JB/T 9168.9-1998 General process code for cutting processing - Gear processing
Some standard content:
Ks 25.020
Standard of the Machinery Industry of the People's Republic of China
JB/T9168.1~9168.13-1998
Common process instructions for cutting
Common process instructions for cutting1998-11·16Published
National Machinery Industry Standard
199812-01Implementation
Standard of the Machinery Industry of the People's Republic of China
Common process instructions for cuttingProcess iastructions fnr This standard defines the basic technical rules that should be followed in gear machining and is applicable to gear machining in various enterprises. Gear milling should also comply with 1R/T9168.1. 2 Reference standards
. IB/T9168.91998
The text contained in the standard is generally cited in the technical standard and becomes the meaning of this standard. The version shown is valid when the standard is published. All standards will be revised. All parties using this standard should consider the possibility of using the latest version of the following standards. B/9168.11008 General tooling for cutting brushes GB 10095-188
3-Light requirements
Degree of involute and concave cylindrical gears
3.! Before installation, check whether the serial number and actual size are consistent with the requirements of the process regulations. 32 When installing the annealing tower, pay attention to the base surface mark and do not install the positioning base surface incorrectly. 3.3 When calculating the teeth of the three-speed gear hobbing ratio, be sure to calculate to the fifth decimal place. 4 Gear Hobbing Process Code
4.1 This standard applies to the use of the rolling cutting method to add 7, 8, and 9 grade precision new line drawing column stepping wheels specified in GB10U5. 4.2 Standard diameter before gear hobbing
4.2.1 When processing the step-by-step herringbone gear, the error of the differential gear must be checked, and the error of the integral gear should be calculated to the fifth decimal place. The differential gear error is calculated according to the formula (): C
Differential gear error:
N—Number of cutter heads
—Gear tooth width
Gear accuracy number; for standard gears, K is 0.CC1, for graded gears, K1.002, for 9-stage gears, it is U.003: Differential gear constant
42.2 When machining the inner wheel with offset function, more appropriate matching requirements should be installed at the corresponding effect. 4.3 Gear machine installation
4.3.1 When installing the embedded tool on the gear machine, it should be adjusted according to the requirements of 1: 4.3.2 The left hydraulic gear machine tool should be adjusted to the base surface with the standard mark facing down and the head should be in contact with the support surface, without lifting paper or other objects. The outer diameter of the tool can be checked according to the table and the reference end circle can be moved. The selected movement does not affect the value specified in 1 and 2. It is not tight. It is approved by the Beijing Machinery Industry Bureau on November 16, 1998.
1812 Implement
Re-check the film to prevent the deformation during compression, gear material
cage length
JB/T9168.9-1998
125--4C0
Gear indexing
Periodic diameter
>400~80G
>om.-2utn
Outer ring foundation engineering runout t||When the three tolerance groups cannot be calculated, the high degree of the degree is determined by the high degree. When the top is taken as the basis, the low degree in the table is the main diameter of the gear shaft. 4.3.3 Installation of gear shaft
4.3.3.! When installing the stepper shaft on a close-gear machine, the following table should be used to check the directional runout of the two reference shafts (or a reference shaft and the top shaft). The total runout tolerance should be calculated using formula (2): 12)
In the formula, x is the runout. Tolerance, mm;
Distance between two measuring points mn
Tooth width of gear shaft, mm;
Accuracy coefficient: For grade 8 and grade 9 precision cam shafts, K value is 0.003~0.01: For grade 9 precision gear shafts, K value is K
0.011~0.013.
When installing the central stepper on the gear hobbing machine, use the following scale to check the parallelism between the stepper top loop line and the vertical movement of the tool holder in the room 4. 3. 3. 2
, 1comu length shall not be 10.c1mm
4.3.4 When the installation is tight, the pressing force is formed through the bearing surface, and the size shall not be in the empty space. The small size should be appropriate. 4.4 The installation type of the rod and the installation side
4.4.1, the precision of the tool rod, the knife force must be strictly divided, and the parallelism of the two end surfaces of the tool pad shall not exceed 605mm. 4.4.2 Before the rod and the tool are installed, the knife channel and the hole and the tool parts must be clean. The inner hole of the bearing shaft must be cleaned and the part must be pushed gently. It is strictly forbidden to hit. 4.4.3
After the tool is turned, the radial direction and the front and rear ends of the tool must be checked. The dynamic tolerance shall not be greater than the requirements of Table 3. 4.4. 4
Also the wheel characteristics
precision in the first grade according to the public welfare requirements,
JB/T 9168.9—1998
G, center 5
2 length is less than or greater than 100 when the value of each increase of 100m, B point practice add 0. 01mmmm
The roller wear eyebrow must gradually pull the drop cutter shaft table to the figure runout, its runout tolerance is not greater than the provisions of Table 4, and the two strokes are required to be consistent. 4. 4.5
Step wheel model consistency
Note: The precision grade is the first requirement.
Cutter selection and grinding standards
4.5.1Cutter selection
According to the precision requirements of the quartz wheel, select the cutter according to Table 5. Table 5
Over-camel grade
Twist-off gear
Note: The material grade shall be in accordance with the requirements of the first group, 4. 5.2
Liquid bluntness standard
When grinding, if the surface is found to be shiny, rough, or the torsion is deteriorated, the hob must be inspected. The minimum number of damages must not be:
α~it
>25~-30
JB/T91689.-1998
4.3 After each grinding, check the cumulative error of the gear, the error of adjacent gears, the non-radial nature of the gear surface, the torsion of the gear surface, and the parallelism of the front face of the gear and the inner hole axis, etc., and use it only after the inspection certificate is obtained. 4.6 Machine adjustment
4. (. 1 In order to ensure the smoothness of the sprocket machine during processing, the clearance between the split gear pulley and the differential pulley should be 0.1~-0.15 mm1.46.2 When machining large gears on large gear hobbing machines, the actual weight of the tooth and the clamp must be measured, the unloading mechanism of the machine tool must be adjusted, and its zeroability must be checked.
4.63 The technical parameters, precision requirements, material and tooth surface hardness of gears processed by the root hobbing machine determine the cutting amount. When using a single-head hob, the following specifications are recommended:
When the efficiency is below 20, the relative density and precision drop are one ohm modulus between 20 and 30, roughing, semi-precision rolling, and precision rolling. Cutting depth: When two-stage cutting is used, the tooth thickness after rough rolling has a fine rolling allowance of 0.50~.1.C0mm. When three-stage cutting is used, the first rough rolling depth is 7U%~804 of the full depth, and the second semi-precision rolling tooth thickness must be 3.a~1. 50mm fine rolling allowance,
Cutting speed: cutting rate is within 15~40m/min, feed rate, rough rolling feed rate is within 0.5~2.0mm/r range. Fine rolling feed rate is selected within 0.6~5mm/. 4.7 Gearing Process
4.7.1 After the machine tool is adjusted, use the tool to test cut and check whether the tooth separation and rotation direction are consistent with the design requirements. 4.7.2 Coarse and fine gears should be strictly separated. If there are parts, coarse and fine gear hobbing should be carried out on two gear hobbing machines. 4.7.3 When cutting herringbone gears, the difference in actual tooth thickness on the right side shall not exceed G.10mm. 5 Gear planing process rules
5.1 This rule applies to the most effective method for processing 7, 8, 9-grade straight teeth. 5.2 Preparation before gear planing
5.2.1 Select and adjust the gear and feed gear according to the processing method and gear module, material and thickness. 5.2.2 Adjust the split gear and roller ratio gear, and the meshing interval should be guaranteed to be 0.1~0.15mm. 5.23 Accurately adjust the roller position of the wheel according to the requirements of precision gear creation. 5.24 After the split gear is adjusted, start the machine tool and use the scale plate of the dust shaft seat to verify the correctness of the split gear 5.2.5 The attenuation ratio of the cutter channel angle and the roll ratio of the hanging wheel are calculated according to formula (3) and formula (4) respectively: S
57.896c号
-h,tane)
K,sing
wherein @——the ratio of the wing angle {*)
,wwW.bzxz.Net
S is the channel tooth thickness on the seat diagram,
h—tooth root height, mm
—tooth angle. (\)
|——Joint angle (\)
R——External cutting distance, mrmL1
Number of gear teeth;
K,-Disturbing bed coefficient,
J/T9168.9—1998
When judging that the tooth profile angle is not equal to the gear pressure angle: Zrosfrcosz
5.3 Point tool (the spindle is installed into the spindle taper hole piece, the radial movement and the surface runout should be corrected, and its benefit is The runout should not be greater than one tenth of the diameter of the tooth and the reference surface. The full surface runout should be less than 0.005mm. 5.4 The clamping of the gear should ensure the correct position of the wheel and the bed. 5.5 The length and height of the bed should be used to set the tool to ensure the correct position of the gear planer. 5.6 When fine planing the gears of the same gear, the same pair of leading teeth should be selected to ensure the working properties of the tooth shape angle. 5. When clamping the gears, the taper and the machine taste should be guaranteed. The center of the cutter should be aligned, and the stroke length of the side cutter should be adjusted according to the distance from the tooth locator surface to its maximum height. Avoid collision between the tool and the frame at the beginning. 5.8 Use and sharpening of cutting tools
5.B.1 When roughing, the cutting force should not exceed c.2mm. 5.8.2 When fine cutting, the tooth cutter should not be ground more than 0.1mm. The front angle of the cutting edge and the front angle of the cutting edge should comply with the relevant provisions of the tool standard
5.8 .3 The straightness of the grinding blade of the pinion gear cutting tool should not exceed 0.01mm. The surface roughness R value should not be greater than 1.6uml, and there should be no material grain and annealing phenomenon: 5. When creating a gear pair, the gear should be planed first, and then the pinion should be matched and processed, and the matching standard should be paid. 6 Gear shaping process rules
1 This rule is applicable to the processing of 7, 8, and grade disconnection specified in GB10UU5 with a card wheel type gear shaping cutter. 6.2 Preparation before gear shaping
(2.1 Adjust the engagement distance of the divided gear wheel within 0.1~0.15mm, 2.2 Select and adjust the speed gear and feed gear according to the processing method, workpiece quality, material and hardness, 6.3 Gear center and gear wear installation history
6.3.1 After the center is polished, its radial runout should not exceed 0.005mm. 6.3.2 Clamping gear When the gear is worn, the marked base surface should be turned down to fit the hollow surface. Paper or pins should not be placed. Before pressing, the radial runout and the reference surface movement of the outer ring should be checked with a dry gauge. The runout should not exceed the requirements of Table 2. 6.3.3 When the gear with a small diameter, poor quality and easy to move is worn, auxiliary support should be added. 6.4 Application and clamping of gear shaping cutters
6.4.1 The accuracy of the gear should be selected according to Table 7.
Gear Note: Precision grade 1 tolerance group, gear shaping cutter special grade 6.4.2 The parallelism tolerance of the two full faces of the force pad shall not be less than 0.CG5mm. The multiplication tolerance of the fracture part of the tool bar and nut and its end face shall not be greater than 0.01mm. 6.4.3 Before the gear shaping cutter is assembled, the radial runout, end face runout and outer diameter wear limit deviation of the part shall be checked with a dry gauge. The value shall not exceed the provisions of Table 8. Public control sheet requirements, 6.5 Machine tool adjustment
JE/9168.91998
6.5.1 According to the gear module, tooth teaching, quality, and degree, select the appropriate uniformity, select and adjust the net stroke teaching of the slotting cutter, and calculate according to formula 5), 000
or the number of strokes per minute of the slotting cutter
cutting speed.m/min;
is.1. The width of the gear mm;
The sum of the length of the cutter cutting in and out, the general pre-press speed can be within the range of 8--30m/ruin (5)
6. During the gearing process, pay attention to the total tool push at any time. When the tool quality reaches 0.15~-0.30㎡, the tool should be changed in time. The milling process of spiral bevel gears
7. Preparation before milling gears
7.2 Gear damage
7.2.1 Install according to the specifications of the seasonal letter and process regulations, and strictly follow the size indicated on the tool (according to the actual size):
7.2.2 When it is necessary to replace the main shaft sleeve of the workpiece, the inner push hole surface of the main shaft and the outer circle and end surface of the main shaft should be cleaned, and a thin layer of machine oil should be applied. Push the matching sleeve into place by hand. There should be a 0.15~Q.20 gap between the end surface of the main shaft sleeve and the main shaft hole. This gap should be eliminated after tightening. 7.3 Installation of the cutter head
7.3.1 Check the cutter head shaft: the outer diameter runout and end face runout should not exceed 1.1mm. 7.3.2 Check the spindle installed on the machine tool: the radial runout of the positioning inner circle or the outer circle of the spindle and the positioning full-length runout should be less than 0. . 7.3.3 The inner hole and rear end face of the disc and the shaft of the machine tool tool must not be worked. After the precision cutting tool is installed on the disc, the white scale will be used for inspection. The error should not be greater than U.02m, and the radial difference of the same name tool should not be greater than 0.005mm. 7.3.4 When the cutter head needs to be replaced during operation, it can only be used after inspection and qualification. 7.1 Machine tool adjustment
7.1 According to the processing methods and various shift numbers specified on the machine tool adjustment card, adjust the position, wheel position, bed position, angle, installation load of the machine tool to restore the use of the monthly rotation angle
7.4.2 When the reverse wheel index is on the center line of the liquid cutting, adjust the gear ratio and roller ratio according to the parameters specified on the machine tool adjustment card. Ensure that their compensation is 0.1~-C.15rnrml. JB/T91 68.9—1998
7.4.3 The gear modulus, material, diameter and speed of the cutter should be selected, and the machine speed can be adjusted within the range of [E.~4nm/min.
.5 Forging
7.5. When milling the gears of the gear, the large gear should be milled first and then the small gear should be milled with the large gear. Marks should be made after milling.
.5.2 After the first tooth is cut, the installation distance between the cylinder teeth should be guaranteed: the condition of the gap should be one, and the gear that is left should be inspected on the machine to see if it runs, adjust the gear and the connection area, and it cannot be officially produced after the joint is expanded. 7.5.3 When milling teeth, the cutter head of the cutter should not be more than 0.3mm: 8 Gear Grinding Process Code
8.1 Preparation before transmission
8.1.1 Gear The number of teeth, material, cutting method, tooth surface characteristics and other elements of the grinding wheel are combined. 8.1.2 The grinding wheel should be balanced → trimmed → leveled → re-trim. 8.2 The installation of the gear to be ground
8, 2,! The installation is in accordance with the technical specifications and process specifications, and the scale marked on it (measured) is marked. Strictly make the horizontal wheel position. 82.2 The gear is installed in the grinding machine After the spindle is repaired, the positioning of the radial dynamic support should be checked and its tolerance should not be greater than:
8.2.3 When the workpiece needs to be replaced, the inner hole of the machine tool shaft and its normal surface, the outer surface of the push sleeve and its surface should be replaced cleanly, and the engine oil should be fully used. Use a pusher to match the sample sleeve and the upper shaft hole. There must be an additional space of 0.15~0.m. This space should be eliminated after pulling.
8. Wheel installation
8.3.1 After the grinding wheel is installed, the grinding machine should be repaired to a correct angle: H.3.2 The correct wheel position of the grinding wheel must be ensured.
8. Machine tool adjustment
4.1 According to the parameters specified on the machine tool, adjust the tool position, single package, cross position of the machine tool, 8.4.2 Adjust the tooth ratio of the pulley and the roller wheel to ensure that the tonnage range is 0.1~n.15:nm, 8.4.3 Adjust the drum wheel structure, adjust the different types of belts and rollers, and ensure that the installation is correct. 8.4.4 Adjust the cam angle; adjust the starting point of the automatic grinding lift to make the angle of the split operation well defined. 4.5 Select appropriate side-scratching materials to ensure that the teeth of the gear being ground do not have burnout, annealing and cracks. 8.5 Spring machining
8.5.1 When scraping the meshing gears, the large gear must be ground first, and then the small gear is ground with the large gear. 8.52 After the gears are aligned, under the conditions of ensuring the installation distance and tooth side clearance, they should be assembled on the rolling straightening machine, adjust the tooth surface fusion area, and mark the qualified points:
9 Gear shaving process rules
1 The installation of the new energy
9.1.1 The light surface jump of the machine before and after or under the workpiece should not exceed C.05mm. The center line of the two top dusts should not be greater than the moving side of the workbench within 159umm F0.t.1mm shaving center fee, and the color should not be greater than 0.005m. 9, 1.2 The end face diameter of the half shaft of the bed is 05mm, and the end faces are almost 005mm0. 2 Selection and installation of shaving cutter
9.2.1 Selection of tooth blade. 21
Western flower essence skin berry warm
Jiang Special Research Grade No. 1 Public Hall Group Requirements, JB/T4165.9—1998
Single World Special Paper
9.2.2 After the shaving cutter is changed, its end face drop and radial movement should not be less than 0.01mm9.2.3 The number of the first cutter should have no common divisor with the number of teeth of the other gears, 9.3 Machine tool adjustment
9.3.1 The spindle control gear should be selected according to the rigidity of the machine tool, gear modulus, material, hardness, gear force type, gear force diameter, etc. 9.3.2 The reverse feed amount should be selected according to the gear number, number of teeth, material, and hardness. The radial feed quality is generally U.005~U,01mm/. The axial feed amount is . 1~0. 5 mm/.
9.3.3 Adjustment of the shaving groove, in order to ensure the accuracy of the tooth direction: the shaving length should generally be 1/2 of the thickness of the gear cutter.
9.4 Gear Shaving Processing
9.4. Selection of the angle during tooth cutting;
a) When shaving spur gears, the shaft angle should be 5 or 15b) When shaving helical gears, the shaft angle should be 10~-25=) When shaving helical gears or service gears, the shaft angle should be appropriately set according to the width of the gear cutter to ensure that the shoulder is not involved. 9.4.2 After the machine tool is adjusted, the gear should be trial-produced and the uniformity accuracy should be checked. Only qualified pieces can be cut. 9.4.3 When the tooth surface loses its scratches, indentations appear, the surface is shiny, the surface is rough, there is dark hitting, the tooth profile error increases, the normal length changes beyond tolerance or abnormal sounds are heard, it should be replaced immediately. 9.4.4 Adjustment of the profiling plate during single front profiling: The profiling plate should be placed according to the center point of the workpiece, and the center point of the worktable should be coincident to ensure that the workpiece has the same amount of stroke, so that the shaved tooth profile is symmetrical. 10 Sha Gear Process Code || tt || 18, the accuracy level of the gear is exceeded, and the gradual tooth force type is selected to deal with the deformation. 10.2 The precision adjustment of the balancing wheel should be 9~10 levels, and the radial runout of the tooth circumference should not be greater than 0.10mm. 10.3 When the gear is adjusted, the gear should generally be in the speed-up state. The speed of the balancing wheel should not be too high, and can be selected within the range of 2003C0r/m:n.
1.4 The number of balancing cycles is 2-4 times. Too many cycles will damage the tooth shape of the gear! 10.5 The overrunning stroke of the balancing wheel should generally be selected according to one-third of the thickness of the grinding wheel. The rest can be in accordance with the gearing process code. 11 Process code for involute cylindrical gears 11.1 Preparation of teeth before grinding
11.1.1 According to the module, number of teeth, material, hardness, grinding method, concave surface avoidance, etc. of the gear, the grinding wheel can be roughly leveled → repaired → finely leveled → trimmed. 11.2 Gear clamping
1.2. [Book 1 (right> The diameter runout of the finished product should not be more than 0.003J1.2.2 Make the shortest possible matching shaft press and grind. 11.3.3 When grinding teeth according to the needs of the spindle: a) The selection of the gear spindle shall be in accordance with the requirements of
JB/T9168.9-1998
b) The various parts of the gear spindle must be precise and suitable according to the requirements of Table 11 c) Ensure that the gear is ground! The matching accuracy of the flash wheel hole and the output spindle; d) The half line of the washer at both ends should not be greater than .005ni. The gear center of the transmission type head should be tightened appropriately. Table 10
Gear absolute grade group
Note Gear structure change grade according to the requirements of the first! Tolerance group Gear accuracy
Instant step spindle
Diameter and gear
0, 0D2-0. 003
0. 053--D.D65
Note: The step wheel auxiliary grade is the key to the public's favorite. 11.24 When using the old type of tool to locate the teeth, choose the type of pumping type, the wet spindle with a price of m per period, the workpiece and the sleeve matching time is 2K per month, the chain spindle is 15000-1! 15000 or the new spindle with a 4-meter grouping, the national spindle or the discarded spindle, the state letter to the outside, the surface of the problem, tt||0.001~0.002
0, 002+-0, 004
0.005--0.006
Bowl surface, juice
Table width R,
a) The tool positioning surface is within the range of 400mm, and the total surface runout should not be greater than 0.(05mm
Bowl surface
Table rough and fine height R
h) The slight lateral movement and reference incremental movement of the inner hole of the drum grinding gear should not be greater than the values specified in Table 2. 11.3 Installation and alignment of grinding wheels
11.3.1 When installing the grinding wheel, the required grinding wheel tooth profile angle should be specified using the grinding wheel characteristics. (d) For conical grinding wheel gear grinding machines, the grinding wheel profile should generally be equal to the pressure angle of the gear being ground. b) For Magnesium grinding machines, the 0 grinding method or K-type grinding method can be used preferentially according to the accuracy of the gear being cut and the production batch. 11.3.2 When correcting the grinding wheel, the moving trajectory of the diamond bit should pass through the axis of the grinding wheel, and the moving speed should be uniform. 11.4 Machine tool adjustment
11.4.1 When using a gear reducer to reduce the gear grinding machine, the diameter of the base disc should be calculated to the fifth significant figure after the decimal point: when using a gear reducer to reduce the gear grinding machine, the base disc diameter should be calculated to the second significant figure after the decimal point. The radial runout of the base plate should not exceed 0.C15mm. 11.4.2 The meshing of the divided gear and the ratio gear should be guaranteed to be within 0.08~-0.12mm. 11.5 Grinding process
11.5.1 According to the module, number of teeth, material, hardness, precision grade, tooth surface texture, material, grit and hardness of the grinding wheel, the grinding speed, feed speed and stroke times should be reasonably selected: 11.5.2 The first wheel should not be ground for the second time to meet the product size. During the grinding process, the shape, tooth direction, and pitch should be checked. If there is any standard, it should be ground to the finished product size.
11.5.3 The gear tooth surface is not allowed to have defects such as olefins, olefins, etc. 23
JB/r 9168.41998
11.5.4 When adjusting the working steps, the gear should be fully opened and there should be appropriate clearance to eliminate the running and transmission clearance or water fluctuation. 244 The number of tooth-average cycles is 2-4 times. Too many cycles will damage the tooth profile of the gear. 10.5 The overrunning stroke of the grinding wheel should generally be selected according to one-third of the grinding wheel thickness. The rest can be determined according to the tooth-average process specifications. 11 Process code for involute cylindrical gears 11.1 Preparation of teeth before grinding
11.1.1 According to the module, number of teeth, material, hardness, grinding method, concave surface avoidance, etc. of the gear, the grinding wheel can be roughly leveled → repaired → finely leveled → trimmed. 11.2 Gear clamping
1.2. [Book 1 (right> The diameter runout of the finished product should not be more than 0.003J1.2.2 Make the shortest possible matching shaft press and grind. 11.3.3 When grinding teeth according to the needs of the spindle: a) The selection of the gear spindle shall be in accordance with the requirements of
JB/T9168.9-1998
b) The various parts of the gear spindle must be precise and suitable according to the requirements of Table 11 c) Ensure that the gear is ground! The matching accuracy of the flash wheel hole and the output spindle; d) The half line of the washer at both ends should not be greater than .005ni. The gear center of the transmission type head should be tightened appropriately. Table 10
Gear absolute grade group
Note Gear structure change grade according to the requirements of the first! Tolerance group Gear accuracy
Instant step spindle
Diameter and gear
0, 0D2-0. 003
0. 053--D.D65
Note: The step wheel auxiliary grade is the key to the public's favorite. 11.24 When using the old type of tool to locate the teeth, choose the type of pumping type, the wet spindle with a price of m per period, the workpiece and the sleeve matching time is 2K per month, the chain spindle is 15000-1! 15000 or the new spindle with a 4-meter grouping, the national spindle or the discarded spindle, the state letter to the outside, the surface of the problem, tt||0.001~0.002
0, 002+-0, 004
0.005--0.006
Bowl surface, juice
Table width R,
a) The tool positioning surface is within the range of 400mm, and the total surface runout should not be greater than 0.(05mm
Bowl surface
Table rough and fine height R
h) The slight lateral movement and reference incremental movement of the inner hole of the drum grinding gear should not be greater than the values specified in Table 2. 11.3 Installation and alignment of grinding wheels
11.3.1 When installing the grinding wheel, the required grinding wheel tooth profile angle should be specified using the grinding wheel characteristics. (d) For conical grinding wheel gear grinding machines, the grinding wheel profile should generally be equal to the pressure angle of the gear being ground. b) For Magnesium grinding machines, the 0 grinding method or K-type grinding method can be used preferentially according to the accuracy of the gear being cut and the production batch. 11.3.2 When correcting the grinding wheel, the moving trajectory of the diamond bit should pass through the axis of the grinding wheel, and the moving speed should be uniform. 11.4 Machine tool adjustment
11.4.1 When using a gear reducer to reduce the gear grinding machine, the diameter of the base disc should be calculated to the fifth significant figure after the decimal point: when using a gear reducer to reduce the gear grinding machine, the base disc diameter should be calculated to the second significant figure after the decimal point. The radial runout of the base plate should not exceed 0.C15mm. 11.4.2 The meshing of the divided gear and the ratio gear should be guaranteed to be within 0.08~-0.12mm. 11.5 Grinding process
11.5.1 According to the module, number of teeth, material, hardness, precision grade, tooth surface texture, material, grit and hardness of the grinding wheel, the grinding speed, feed speed and stroke times should be reasonably selected: 11.5.2 The first wheel should not be ground for the second time to meet the product size. During the grinding process, the shape, tooth direction, and pitch should be checked. If there is any standard, it should be ground to the finished product size.
11.5.3 The gear tooth surface is not allowed to have defects such as olefins, olefins, etc. 23
JB/r 9168.41998
11.5.4 When adjusting the working steps, the gear should be fully opened and there should be appropriate clearance to eliminate the running and transmission clearance or fluid fluctuations. 244 The number of tooth-average cycles is 2-4 times. Too many cycles will damage the tooth profile of the gear. 10.5 The overrunning stroke of the grinding wheel should generally be selected according to one-third of the grinding wheel thickness. The rest can be determined according to the tooth-average process specifications. 11 Process code for involute cylindrical gears 11.1 Preparation of teeth before grinding
11.1.1 According to the module, number of teeth, material, hardness, grinding method, concave surface avoidance, etc. of the gear, the grinding wheel can be roughly leveled → repaired → finely leveled → trimmed. 11.2 Gear clamping
1.2. [Book 1 (right> The diameter runout of the finished product should not be more than 0.003J1.2.2 Make the shortest possible matching shaft press and grind. 11.3.3 When grinding teeth according to the needs of the spindle: a) The selection of the gear spindle shall be in accordance with the requirements of
JB/T9168.9-1998
b) The various parts of the gear spindle must be precise and suitable according to the requirements of Table 11 c) Ensure that the gear is ground! The matching accuracy of the flash wheel hole and the output spindle; d) The half line of the washer at both ends should not be greater than .005ni. The gear center of the transmission type head should be tightened appropriately. Table 10
Gear absolute grade group
Note Gear structure change grade according to the requirements of the first! Tolerance group Gear accuracy
Instant step spindle
Diameter and gear
0, 0D2-0. 003
0. 053--D.D65
Note: The step wheel auxiliary grade is the key to the public's favorite. 11.24 When using the old type of tool to locate the teeth, choose the type of pumping type, the wet spindle with a price of m per period, the workpiece and the sleeve matching time is 2K per month, the chain spindle is 15000-1! 15000 or the new spindle with a 4-meter grouping, the national spindle or the discarded spindle, the state letter to the outside, the surface of the problem, tt||0.001~0.002
0, 002+-0, 004
0.005--0.006
Bowl surface, juice
Table width R,
a) The tool positioning surface is within the range of 400mm, and the total surface runout should not be greater than 0.(05mm
Bowl surface
Table rough and fine height R
h) The slight lateral movement and reference incremental movement of the inner hole of the drum grinding gear should not be greater than the values specified in Table 2. 11.3 Installation and alignment of grinding wheels
11.3.1 When installing the grinding wheel, the required grinding wheel tooth profile angle should be specified using the grinding wheel characteristics. (d) For conical grinding wheel gear grinding machines, the grinding wheel profile should generally be equal to the pressure angle of the gear being ground. b) For Magnesium grinding machines, the 0 grinding method or K-type grinding method can be used preferentially according to the accuracy of the gear being cut and the production batch. 11.3.2 When correcting the grinding wheel, the moving trajectory of the diamond bit should pass through the axis of the grinding wheel, and the moving speed should be uniform. 11.4 Machine tool adjustment
11.4.1 When using a gear reducer to reduce the gear grinding machine, the diameter of the base disc should be calculated to the fifth significant figure after the decimal point: when using a gear reducer to reduce the gear grinding machine, the base disc diameter should be calculated to the second significant figure after the decimal point. The radial runout of the base plate should not exceed 0.C15mm. 11.4.2 The meshing of the divided gear and the ratio gear should be guaranteed to be within 0.08~-0.12mm. 11.5 Grinding process
11.5.1 According to the module, number of teeth, material, hardness, precision grade, tooth surface texture, material, grit and hardness of the grinding wheel, the grinding speed, feed speed and stroke times should be reasonably selected: 11.5.2 The first wheel should not be ground for the second time to meet the product size. During the grinding process, the shape, tooth direction, and pitch should be checked. If there is any standard, it should be ground to the finished product size.
11.5.3 The gear tooth surface is not allowed to have defects such as olefins, olefins, etc. 23
JB/r 9168.41998
11.5.4 When adjusting the working steps, the gear should be fully opened and there should be appropriate clearance to eliminate the running and transmission clearance or water fluctuation. 24
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