Some standard content:
1CS25.100.01
Machinery Industry Standard of the People's Republic of China
JB/10231.4-2001
Tool Product Inspection Methods
Part 4: Taps
Taol inspection methods part4: taps2001-03-29 Issued
China Machinery Industry Federation
2001-07-01 Implementation
THT[0231.4—2001
This standard was first issued on March 29, 2001. Foreword
This standard was proposed and managed by the National Tool Standardization Technical Committee. The main drafting units of this standard are: Chengdu Tool Research Institute, Henan No. 1 Tool Factory, Shanghai 1 Tool Factory Co., Ltd., Shanghai Cutting Tool Co., Ltd., Chengdu Pan Tool Cutting Tool Co., Ltd. The main drafters of this standard are Qian, Zhao Jianmin, Zhang Minwu, Gu Pi, and Zhuan Jian. This standard is published for the first time.
Mechanical Industry Standard of the People's Republic of China
Tool Product Testing Method
Part 4: Taps
Toai inapartion methadspart4:tapsJR/T 1023E4—2001
This standard specifies the test items, physical testing instruments and test methods for finished wire fiber testing. This method is not exclusive. - This standard is applicable to the quality inspection of chain materials produced in accordance with GB/T67-969, GB/T3464.1-3464.3, GB/T3506, JB/T8364.2, JD/T364.3, 1B/18786, 41-8824.4, 25-88254, and 9994~96. Other finished products can be used as reference.
Cited Standards
The following standards contain provisions that are referenced in this standard and are considered as standard documents. When this standard is published, the versions shown are valid. All standard parts will be considered, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GH/1 967—1994
GB/T 9681994
GB/T 9691994
GB/T 3464.11994
GB/T 3464.2—1554
GB/T 3464.3[594
GB.T35061993
JRTR36431996
JR/T 83G4.3--196
JB/T 8786—1998
JB/T8824.1—1998
[B/T8824.2—1996
JB/T8B24.3—1990
FB/T 8824.4—1998
JB/T8825.1-1995
JB/T8825.2—1998
JB/8825.3—1998
B/[8825.4—199B
:JB/T 99941999
[B/T 9995-1999
Nut thread
Thread taps
Technical conditions for machine and hand taps
Long handle machine taps
Short handle machine and hand taps
Spiral tapsWww.bzxZ.net
000 taps
Technical specifications for taps
Long handle nut taps
Unified thread taps
Unified thread tolerances
Unified thread thread technical parts
Unified spicy thread nut tap
Whitworth thread multi-taper
Whitworth thread tap thread public maintenance
Lianshi thread tap technical provisions
Zhongwu thread nut pure tap
55 cases of support thread tap
55+ reading technology frequency pattern pure maintenance
China Machinery Industry Federation 2001-13-29 approved ladder thread tolerance
2001-07-01 implementation
JB/T9996 ...J999
JBT10231.1—2001
Testing basis
Related standards and product drawings.
Testing of accompanying items
JB/T 10231.4200t
55″Pipe Thread Tap
Tool is a product for the first part of the law: General
The following items of the test method and testing equipment are in accordance with the relevant provisions of JB/T10231.1 for the finished items: a) Marking, packaging:
b) Appearance, surface twist lock:
Material, convenience, surface treatment.
5 Main deviation K, detection|| tt||5.1 Testing equipment
Only when the microscope is under the wire,
5.2 Testing method
The wire sample is mounted on two original tips, and the horizontal hemp line of the hook head is tangent to the tooth of the wire cutting part. The reading angle between the velvet of the wire pliers shaft and the sewing part is measured as the main deflection angle. See Figure 1, Figure
Detection of the front angle
6.1 Testing equipment
Wire group front angle inspection instrument.
6. 2. Detection force method
Measure from the thread part to the part, and measure on the first complete tooth bullet of the calibration part. See Figure 2a), adjust the instrument to make the tooth tip coincide with the center of the sharp cross line, turn the dividing plate to make the vertical line of the cross line tangent to the front of the tooth, then the angle indicated by the line is the front angle. When the thread key is the front of the curve, the chord is placed forward, see Figure): Sweat: It is allowed to use a universal foot lock to measure the front angle. 2
J8T10231.4
Note: It is the front (the intersection of the main diameter 4 and the small diameter 4 with the curve surface) The joint battle of the point) benefits - a package transmission center! The plane between the effective tooth substance. Figure 2
The detection of the tooth half angle
7. The detector
can be a tool microscope, a dividing head,
7.2 The detection method
First select the middle diameter of the tooth, and its value is calculated as shown in formula (3. Then the main microscope column can be rotated to a certain direction, and the calculation of the tooth opening angle is shown in formula (4). The detection part of this item is the sacrificial calibration part. Any complete tooth is adjusted to the lens. The straight line of the word is cut with the whole tooth rate, see Figure 3, thank the tooth type half angle, then rotate the tap 1, and measure the mother again for the same tooth type. The data processing of the actual deviation of the left and right halves is based on formula (1), formula (2 with
left = +/2
4a2(e/2c)+f22/2
in; 2 (left). 2 (left) - tooth avoidance half angle measured value deviation: 2 -
nominal tooth type half angle.
D=Ksin(a/2/4
In the formula: D - - Instrument light limit diameter;
K—- system effect;
- screw median diameter,
Where: P
JH斤10231.4-2D01
anw=P(m,)
The half angle measured by the above method is the normal tooth profile half angle value. When it is necessary to 2\30, it should be calculated according to formula (5): 2)=/2(/co5
Where: 22(n) Actual measured value of the inter-axial tooth profile half angle; () Actual measured value of the inter-normal tooth profile half angle,,,.4
When detecting the half angle of the tooth profile of the probe, other workers shall do as described above, but when measuring the other side of the middle tooth, the dividing head shall be rotated to form a pair of compensation angles, and the calculation shall be made according to formula (9) or formula (9). 8.1 Detection of B pitch The same as .1. 8.2 Detection method 2.2.1 Adjustment of straight thread push 7.2. When eliminating the style, make the center of the lens M-shaped line close to the effective middle diameter line, record the longitudinal reading, and then eliminate the teeth according to the standard. Measure the end distance P [[, 2, \, n and P" (=1, 2,, month at any point of the calibration part. See 4a. The average value of the single-sided pitch rate P of the two adjacent tooth sides with the same name is the actual measured value of the pitch. That is, P = (- Wei \/2, after data processing, the maximum pitch deviation is determined. Table 1 is a numerical analysis of the T-tooth pitch of M10-H1 machine wire with a pitch of 1.5mm. Processing: The calculation steps are as follows:
! 1) Fill the measured pitch values into the first column of Figure 1 in sequence; 2) Subtract the theoretical pitch from the first column number, and measure the error into the second column; 3) Take the sum of the first number, the second number, the third number, the fourth number, and the fourth number, and list them in the fourth column; 4) Find the maximum and minimum values of the Yth column, and list the difference between the value of the larger thread number and the value of the smaller thread number in the first column; 5) The value in the first column is the deviation. Table
P,= (P+P-1 /2-
P(+-P J2
Single pitch deviation
For the pitch amplitude difference of the 0-position
Large amplitude difference
B.2.2 Spiral groove wire chain
JB/T10231.4—2001
When measuring the spiral wire chain, the measuring disk requirements and data processing are the same as B.2.1. Only when each measurement is made, the dividing head needs to rotate a focus compensation angle. The measured value is the projection P of the normal P on the axial direction, see Figure 4b). Then the difference between the actual measured value of P and the theoretical value of is the required pitch deviation. The relationship is connected to formula (6)-formula (10H=36
When the narrow chip is rotating:
B= 360°[PKH - m]
Pe-PHRH-P)
When the extension is left-handed:
e = 360[P( + P)]:
Phe=PH H+ P)
In the formula,
Actual measuring length of the chip relative axial direction:
The angle of the dividing head when measuring 7 lengths
Actual range of the chip:
The chip is left-handed
Explanation item right
2.3 Dimensional screw thread
JB/10231.4--2001
When testing the thread tap, use the standard wheel to measure the thread. See Figure 4c, select the appropriate standard wheel diameter, which matches the measured thread. The difference between two adjacent longitudinal readings is the measured pitch value. When the pitch accuracy requirement is high, the axis cutting method is used.
Detection of tooth top height and tooth bottom height
9.1 Detection instrument
Universal microscope
9.2 Detection method
Adjust the same instrument as 7,2, and adjust the center of the lens M-shaped line to the half of the final height of a perfect tooth. When measuring the other tooth, the horizontal slide should move a radial amount B. The difference between the two longitudinal readings of the measured disk is the actual measured value. See Figure 5. Through the measurement function, find out that the measured value of the tooth thickness is equal to half of the theoretical pitch (the position of the radial line in the direction of the required loss). Then turn the lens M-shaped line horizontally by 2 times to measure the tooth top and tooth bottom readings respectively. Then the calculation formula of the tooth top height and tooth bottom height is (11) ~ (13) )=
B-[Ptan/2]/2
Wu Jin: 2
Taper push,
10 Detection of major diameter
10.1 Detection equipment
Micrometer with a graduation value of 0.01mm, universal microscope 10.2 Detection method
19.2.3 Wire diameter due to column coal
"Divider fire
［12】
Measure at the starting point of the calibration part. The major diameter of the nut wire is measured at the first complete tooth of the calibration part. For even-numbered groove wire chains, use an outer diameter sub-meter. Trisaccharide, The grid wire is measured by a three-groove micrometer and a five-groove micrometer, see Figure 6. 10.2.2 Wire saw
JB/T10231.4-2001
The diameter of the wire saw is measured by a microscope at a given base position. The true diameter of the wire formed by the wire teeth cut along the direction perpendicular to the axial load is measured.
11 Detection of small diameter
11.1 Detection equipment
11.2 Detection method
2 Wire saw
According to the figure, the direction of the intersection of the wire and the tooth is measured at two places. The reading value is the difference between the two values, which is the double measurement value of the minor diameter. Figure?
11.2.2 Taper thread tap
The minor diameter of the taper thread is measured at a given base surface, and the diameter formed by cutting the bottom of the thread along the vertical axis is measured.
12 Detection of the middle diameter
12. Standard measuring instruments
Micrometer with a graduation value of mm, three-needle or five-needle: thread stem micrometer, odd-numbered comparison, standard pattern bar: Wanfu tool microscope.
12.2 Detection method
The measurement position of the middle diameter of the thread is The starting point of the calibration part. If the starting point of the calibration part of the hand-held wire is less than 4 teeth from the front end, it is tested at the 4 teeth of the front end. The tap is moved 1-2 teeth from the midpoint of the front cutting part to the collection part for testing. The dimensional thread group is measured at the specified base surface position. There are three methods for this test: Method 1; For odd-numbered wires, use three needles and a micrometer to measure the outer diameter. For odd-numbered wires, use five needles, a micrometer or a micrometer (see Figure a), place the three needles at the teeth of the specified position, and measure with a micrometer. One needle should be in contact at the same time, and the wire is rotated to measure the maximum value of M. The difference between the theoretical value and the value is the actual deviation of the wire group. M chain is calculated according to formula (14) and formula [15). 60° tooth type dart pattern:
Md2 +(3dm -0.866P)
55° tooth type horn snail pattern:
.d, + (3.1657dm0.9605F)
Where: d.—three needle (or t needle) diameter
P—end distance;
-(15 )
JB/T10231.4-201
a—median diameter, the nominal median diameter is used when calculating the theoretical value. Formula [14). Formula (15) can be simplified to formula (16) +
Formula: A—constant, which are equal to the bracketed items. --..-(161
The three-piece (or five-pin) diameter and constant A corresponding to the number of steps of the 60° tooth angle are given in Tables 2 and 3, and the number of steps of the 55° tooth type is given in Table 4.
Three-pin diameter d
25.4mm upper tooth type
Three outer diameters
.0.170
.0.9305
25.4 mum 1: year old
Three-pin diameter d.
Second seal diameter 4
.4.7680
Second pin diameter d
B/T102342001
25.4mm tooth type
Second well diameter 4
.3.177
3 2498
.4.63.99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first. Method 3: Use an image measuring disk (used for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the chain stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)
Phe=PH H+ P)
In the formula,
Actual measuring length of the chip relative axial direction:
The angle of the dividing head when measuring 7 lengths
Actual distance of the chip:
Left-hand rotation
Explanation of the item right-hand construction
2.3 Dimensional thread tap
JB/10231.4--2001
When testing the thread tap of a high-speed thread, use a standard wheel to measure the thread. See Figure 4c, select a suitable standard wheel to match the thread of the measured thread. The difference between two adjacent longitudinal readings is the actual measured pitch value. When the pitch accuracy requirement is high, the axis cutting method is used for measurement.
Detection of tooth top height and tooth bottom height
9.1 Detection instrument
Universal microscope
9.2 Detection method
The same instrument is adjusted as in 7,2, and the center of the M-shaped line of the lens is selected to be near the half of the tooth height of the perfect tooth. When measuring the other tooth, the horizontal slide should move a radial amount B. The difference between the two longitudinal readings of the measured disk is the actual measured value. See Figure 5. Through the measurement function, find out that the actual measured value of the tooth thickness is equal to half of the egg pitch (the position of the radial line in the direction of the required loss effect). Then turn the M-shaped line of the lens horizontally by 2 times to measure the tooth top and tooth bottom readings respectively. Then the calculation formula of the tooth top height and tooth bottom height is as follows (11 ~ (13) )=
B-[Ptan/2]/2
Wu Jin: 2
Taper push,
10 Detection of major diameter
10.1 Detection equipment
Micrometer with a graduation value of 0.01mm, universal microscope 10.2 Detection method
19.2.3 Wire diameter due to column coal
"Divider fire
［12】
Measure at the starting point of the calibration part. The major diameter of the nut wire is measured at the first complete tooth of the calibration part. For even-numbered groove wire chains, use an outer diameter sub-meter. Trisaccharide, The grid wire is measured by a three-groove micrometer and a five-groove micrometer, see Figure 6. 10.2.2 Wire saw
JB/T10231.4-2001
The diameter of the wire saw is measured by a microscope at a given base position. The true diameter of the wire formed by the wire teeth cut along the direction perpendicular to the axial load is measured.
11 Detection of small diameter
11.1 Detection equipment
11.2 Detection method
2 Wire saw
According to the figure, the direction of the intersection of the wire and the tooth is measured at two places. The reading value is the difference between the two values, which is the double measurement value of the minor diameter. Figure?
11.2.2 Taper thread tap
The minor diameter of the taper thread is measured at a given base surface, and the diameter formed by cutting the bottom of the thread along the vertical axis is measured.
12 Detection of the middle diameter
12. Standard measuring instruments
Micrometer with a graduation value of mm, three-needle or five-needle: thread stem micrometer, odd-numbered comparison, standard pattern bar: Wanfu tool microscope.
12.2 Detection method
The measurement position of the middle diameter of the thread is The starting point of the calibration part. If the starting point of the calibration part of the hand-held wire is less than 4 teeth from the front end, it is tested at the 4 teeth of the front end. The tap is moved 1-2 teeth from the midpoint of the front cutting part to the collection part for testing. The dimensional thread group is measured at the specified base surface position. There are three methods for this test: Method 1; For odd-numbered wires, use three needles and a micrometer to measure the outer diameter. For odd-numbered wires, use five needles, a micrometer or a micrometer (see Figure a), place the three needles at the teeth of the specified position, and measure with a micrometer. One needle should be in contact at the same time, and the wire is rotated to measure the maximum value of M. The difference between the theoretical value and the value is the actual deviation of the wire group. M chain is calculated according to formula (14) and formula [15). 60° tooth type dart pattern:
Md2 +(3dm -0.866P)
55° tooth type horn snail pattern:
.d, + (3.1657dm0.9605F)
Where: d.—three needle (or t needle) diameter
P—end distance;
-(15 )
JB/T10231.4-201
a—median diameter, the nominal median diameter is used when calculating the theoretical value. Formula [14). Formula (15) can be simplified to formula (16) +
Formula: A—constant, which are equal to the bracketed items. --..-(161
The three-piece (or five-pin) diameter and constant A corresponding to the number of steps of the 60° tooth angle are given in Tables 2 and 3, and the number of steps of the 55° tooth type is given in Table 4.
Three-pin diameter d
25.4mm upper tooth type
Three outer diameters
.0.170
.0.9305
25.4 mum 1: year old
Three-pin diameter d.
Second seal diameter 4
.4.7680
Second pin diameter d
B/T102342001
25.4mm tooth type
Second well diameter 4
.3.177
3 2498
.4.63.99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first. Method 3: Use an image measuring disk (used for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the chain stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)
Phe=PH H+ P)
In the formula,
Actual measuring length of the chip relative axial direction:
The angle of the dividing head when measuring 7 lengths
Actual distance of the chip:
Left-hand rotation
Explanation of the item right-hand construction
2.3 Dimensional thread tap
JB/10231.4--2001
When testing the thread tap of a high-speed thread, use a standard wheel to measure the thread. See Figure 4c, select a suitable standard wheel to match the thread of the measured thread. The difference between two adjacent longitudinal readings is the actual measured pitch value. When the pitch accuracy requirement is high, the axis cutting method is used for measurement.
Detection of tooth top height and tooth bottom height
9.1 Detection instrument
Universal microscope
9.2 Detection method
The same instrument is adjusted as in 7,2, and the center of the M-shaped line of the lens is selected to be near the half of the tooth height of the perfect tooth. When measuring the other tooth, the horizontal slide should move a radial amount B. The difference between the two longitudinal readings of the measured disk is the actual measured value. See Figure 5. Through the measurement function, find out that the actual measured value of the tooth thickness is equal to half of the egg pitch (the position of the radial line in the direction of the required loss effect). Then turn the M-shaped line of the lens horizontally by 2 times to measure the tooth top and tooth bottom readings respectively. Then the calculation formula of the tooth top height and tooth bottom height is as follows (11 ~ (13) )=
B-[Ptan/2]/2
Wu Jin: 2
Taper push,
10 Detection of major diameter
10.1 Detection equipment
Micrometer with a graduation value of 0.01mm, universal microscope 10.2 Detection method
19.2.3 Wire diameter due to column coal
"Divider fire
［12】
Measure at the starting point of the calibration part. The major diameter of the nut wire is measured at the first complete tooth of the calibration part. For even-numbered groove wire chains, use an outer diameter sub-meter. Trisaccharide, The grid wire is measured by a three-groove micrometer and a five-groove micrometer, see Figure 6. 10.2.2 Wire saw
JB/T10231.4-2001
The diameter of the wire saw is measured by a microscope at a given base position. The true diameter of the wire formed by the wire teeth cut along the direction perpendicular to the axial load is measured.
11 Detection of small diameter
11.1 Detection equipment
11.2 Detection method
2 Wire saw
According to the figure, the direction of the intersection of the wire and the tooth is measured at two places. The reading value is the difference between the two values, which is the double measurement value of the minor diameter. Figure?
11.2.2 Taper thread tap
The minor diameter of the taper thread is measured at a given base surface, and the diameter formed by cutting the bottom of the thread along the vertical axis is measured.
12 Detection of the middle diameter
12. Standard measuring instruments
Micrometer with a graduation value of mm, three-needle or five-needle: thread stem micrometer, odd-numbered comparison, standard pattern bar: Wanfu tool microscope.
12.2 Detection method
The measurement position of the middle diameter of the thread is The starting point of the calibration part. If the starting point of the calibration part of the hand-held wire is less than 4 teeth from the front end, it is tested at the 4 teeth of the front end. The tap is moved 1-2 teeth from the midpoint of the front cutting part to the collection part for testing. The dimensional thread group is measured at the specified base surface position. There are three methods for this test: Method 1; For odd-numbered wires, use three needles and a micrometer to measure the outer diameter. For odd-numbered wires, use five needles, a micrometer or a micrometer (see Figure a), place the three needles at the teeth of the specified position, and measure with a micrometer. One needle should be in contact at the same time, and the wire is rotated to measure the maximum value of M. The difference between the theoretical value and the value is the actual deviation of the wire group. M chain is calculated according to formula (14) and formula [15). 60° tooth type dart pattern:
Md2 +(3dm -0.866P)
55° tooth type horn snail pattern:
.d, + (3.1657dm0.9605F)
Where: d.—three needle (or t needle) diameter
P—end distance;
-(15 )
JB/T10231.4-201
a—median diameter, the nominal median diameter is used when calculating the theoretical value. Formula [14). Formula (15) can be simplified to formula (16) +
Formula: A—constant, which are equal to the bracketed items. --..-(161
The three-piece (or five-pin) diameter and constant A corresponding to the number of steps of the 60° tooth angle are given in Tables 2 and 3, and the number of steps of the 55° tooth type is given in Table 4.
Three-pin diameter d
25.4mm upper tooth type
Three outer diameters
.0.170
.0.9305
25.4 mum 1: year old
Three-pin diameter d.
Second seal diameter 4
.4.7680
Second pin diameter d
B/T102342001
25.4mm tooth type
Second well diameter 4
.3.177
3 2498
.4.63.99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first. Method 3: Use an image measuring disk (used for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)3 The wire diameter of the nut is measured at the starting point of the calibration part. The major diameter of the nut wire is measured at the first complete tooth of the calibration part. The outer diameter of the even-numbered groove wire chain is measured with an outer diameter micrometer. The three-groove micrometer and the five-groove micrometer are used for the three-groove and five-groove micrometers, respectively, as shown in Figure 6. 10.2.2 The diameter of the frequency-corrugated wire button JB/T10231.4-2001 The true diameter of the threaded wire saw is measured at a given base position using a power tool microscope along the direction perpendicular to the axial load to obtain the desired threaded tooth. 11 Detection of minor diameter 11.1 Detector 11.2 Test method 2 According to the figure, take the readings of the two points where the thread and the thread meet, and the difference between the two values is the minor diameter. Figure 11.2.2 Thread taps The minor diameter of the taper thread is measured at a given base surface, and the diameter formed by the thread bottom cut perpendicular to the axis is measured. 12 Test of the pitch diameter 12. Standard measuring instruments Micrometer with a graduation value of mm: three-needle or five-needle thread micrometer, standard tool microscope. 12.2 Test method The measurement position of the thread pitch diameter is at the starting point of the calibration part. If the starting point of the calibration part of the hand-held wire is less than 4 teeth from the front end, the test is performed at the 4 teeth of the front end. The tap is moved 1-2 teeth from the midpoint of the front cutting part to the calibration part for testing. The dimensional thread group is measured at the specified base surface position. There are three methods for this test: Method 1: For odd-numbered wires, use three needles and a micrometer to measure the outer diameter. For odd-numbered wires, use five needles, a micrometer or a micrometer (see Figure a), place the three needles at the teeth of the current position, and measure with a micrometer. The needle should be in contact at the same time, and the wire is rotated to measure the maximum value. The difference between the theoretical value and the value is the actual deviation of the wire group. M chain is calculated according to formula (14) and formula [15). 60° tooth type dart pattern:
Md2 +(3dm -0.866P)
55° tooth type horn snail pattern:
.d, + (3.1657dm0.9605F)
Where: d.—three needle (or t needle) diameter
P—end distance;
-(15 )
JB/T10231.4-201
a—median diameter, the nominal median diameter is used when calculating the theoretical value. Formula [14). Formula (15) can be simplified to formula (16) +
Formula: A—constant, which are equal to the bracketed items. --..-(161
The three-piece (or five-pin) diameter and constant A corresponding to the number of steps of the 60° tooth angle are given in Tables 2 and 3, and the number of steps of the 55° tooth type is given in Table 4.
Three-pin diameter d
25.4mm upper tooth type
Three outer diameters
.0.170
.0.9305
25.4 mum 1: year old
Three-pin diameter d.
Second seal diameter 4
.4.7680
Second pin diameter d
B/T102342001
25.4mm tooth type
Second well diameter 4
.3.177
3 2498
.4.63.99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first. Method 3: Use an image measuring disk (used for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the chain stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)3 The wire diameter of the nut is measured at the starting point of the calibration part. The major diameter of the nut wire is measured at the first complete tooth of the calibration part. The outer diameter of the even-numbered groove wire chain is measured with an outer diameter micrometer. The three-groove micrometer and the five-groove micrometer are used for the three-groove and five-groove micrometers, respectively, as shown in Figure 6. 10.2.2 The diameter of the frequency-corrugated wire button JB/T10231.4-2001 The true diameter of the threaded wire saw is measured at a given base position using a power tool microscope along the direction perpendicular to the axial load to obtain the desired threaded tooth. 11 Detection of minor diameter 11.1 Detector 11.2 Test method 2 According to the figure, take the readings of the two points where the thread and the thread meet, and the difference between the two values is the minor diameter. Figure 11.2.2 Thread taps The minor diameter of the taper thread is measured at a given base surface, and the diameter formed by the thread bottom cut perpendicular to the axis is measured. 12 Test of the pitch diameter 12. Standard measuring instruments Micrometer with a graduation value of mm: three-needle or five-needle thread micrometer, standard tool microscope. 12.2 Test method The measurement position of the thread pitch diameter is at the starting point of the calibration part. If the starting point of the calibration part of the hand-held wire is less than 4 teeth from the front end, the test is performed at the 4 teeth of the front end. The tap is moved 1-2 teeth from the midpoint of the front cutting part to the calibration part for testing. The dimensional thread group is measured at the specified base surface position. There are three methods for this test: Method 1: For odd-numbered wires, use three needles and a micrometer to measure the outer diameter. For odd-numbered wires, use five needles, a micrometer or a micrometer (see Figure a), place the three needles at the teeth of the current position, and measure with a micrometer. The needle should be in contact at the same time, and the wire is rotated to measure the maximum value. The difference between the theoretical value and the value is the actual deviation of the wire group. M chain is calculated according to formula (14) and formula [15). 60° tooth type dart pattern:
Md2 +(3dm -0.866P)
55° tooth type horn snail pattern:
.d, + (3.1657dm0.9605F)
Where: d.—three needle (or t needle) diameter
P—end distance;
-(15 )
JB/T10231.4-201
a—median diameter, the nominal median diameter is used when calculating the theoretical value. Formula [14). Formula (15) can be simplified to formula (16) +
Formula: A—constant, which are equal to the bracketed items. --..-(161
The three-piece (or five-pin) diameter and constant A corresponding to the number of steps of the 60° tooth angle are given in Tables 2 and 3, and the number of steps of the 55° tooth type is given in Table 4.
Three-pin diameter d
25.4mm upper tooth type
Three outer diameters
.0.170
.0.9305
25.4 mum 1: year old
Three-pin diameter d.
Second seal diameter 4
.4.7680
Second pin diameter d
B/T102342001
25.4mm tooth type
Second well diameter 4
.3.177
3 2498
.4.63.99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first. Method 3: Use an image measuring disk (used for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the chain stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first.
Method 2: Use an image measuring disc (for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the chain stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)99
Method 2: Use a thread gauge or odd-number comparator to measure. When using an odd-number comparator, it must be calibrated with a standard thread sample first.
Method 2: Use an image measuring disc (for screw thread) on a universal microscope. First, record the longitudinal reading by passing the light through the end of the tap. Then move the distance! to the base front position. Turn the screw so that the contour line of the thread and the thread are symmetrically fitted. (See %h) Measure the left and right thread cuts (near the mid-diameter line), and then calculate the base surface mid-diameter using formula (17). If the measuring position is not the base but position 1 (see Figure 8c), then the mid-diameter d is calculated using formula (18). When the mid-diameter accuracy is required to be higher, the axis cutting method can be used on a universal microscope to measure the spot.
d, =(d,r+d, m/2
d=(l xI++
Where: ★
Thread thread size:
Medium diameter at the largest part of the pipe,
Measurement scale
B/T10251,4200
When the test results are controversial, use a method to cut the screw tap, c)
Note: If there are unequal light threads, the diameter of the product can be ignored. The extraction rate is allowed to be used as the inspection factor, 13. 1 Testing equipment
Universal tool microscope.
13.2 Testing method
Measure with the image method on a universal tool microscope. Measure two median diameters +,,d with a distance L between them in the calibration part, see Figure 9. The actual conicity deviation 4y measured in length shall not exceed the allowable deviation 4. The calculation formula is as follows (19)-(21). When the chain stop length is one: [6:
Where: - The theoretical value of the difference between the two diameters in length: 81mm The allowable taper deviation in length.
(20)
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