This part specifies the testing methods and testing equipment for round broaches. These methods are not exclusive. This part is applicable to the testing of round broaches for machining smooth cylindrical holes with a diameter of less than 120 mm produced according to JB/T 7962. JB/T 10231.7-2002 Tool Product Testing Methods Part 7: Round Broaches JB/T10231.7-2002 Standard Download Decompression Password: www.bzxz.net

HCS25.100.25
Machinery Industry Standard of the People's Republic of China
JB/T10231.7——2002
Tool inspection methods
Part 7: Round broaches
Published on 2002-07-16
Implementation on 2002-12-01
Published by the State Economic and Trade Commission of the People's Republic of China
2 Normative reference documents
3 Design basis
4 Inspection methods and inspection instruments
4.! Appearance..
JB/I 10231.7-—2002
Thickness
Outer diameter of calibration teeth and precision-cut teeth of the same size, and outer diameter consistency, or calibration tooth taper, radial run-out of calibration teeth and inner and rear guide parts of the same size..Radial run-out of the outer circle of other parts, outer diameter of precision-cut teeth and leading part, rear part and shank
Outer diameter of leading part, rear part and shank
Oblique run-out of guide surface
Slot size
Material and hardness
Marking and packaging
This standard is proposed by China Machinery Industry Federation. Foreword
This standard is proposed by National Standardization Technical Safety Committee of Shandong Province.
The main drafters of this certificate: Wang Xiaoxian, Wang Jiagao, JB/T10231.7—2002
1 Scope
Tool product testing methods
Part 3: Broaches
This part specifies the testing methods and testing equipment for broaches. These methods are not difficult to achieve. JB/T10231.7—2002
This part is applicable to the testing of smooth cylindrical round broaches with a true diameter within 120mm produced according to JB/T7962-1999. 2 Normative references
The following clauses become clauses of this part through reference to this part of JB/1U231. For dated references, all amendments (excluding the contents of the negotiation) or revisions are not applicable to this part. However, the parties who reach an agreement based on this part are encouraged to use the latest versions of these documents. For undated references, the latest versions apply to this part.
B/T7962—1999 Technical conditions for broaches
JBT10231I.I—20D1 Test methods for force tools Part 1: General 3 Inspection basis
Related product standards and drawings.
4 Inspection method and detector
4.1 Appearance
Appearance inspection shall be in accordance with the provisions of Section 4 of R1231.1-201. 4.2 Surface roughness
Surface roughness inspection shall be in accordance with the provisions of Section 5 of 1B/T[0231.1-2001. 4.3 The outer diameter of the calibration tooth and the precision-cutting tooth with the same size, and the consistency of the outer diameter, or the taper of the calibration tooth 4.3.1 Inspection method
Select the tool according to the size and tolerance of the outer diameter of the broach. First, use 4 equal blocks to form the basic ruler of the calibration tooth to test the lever caliper or lever leveling ruler, and determine the zero position: the algebraic sum of the value displayed by the lever support caliper or the rod micrometer and the actual value of the outer diameter is checked. According to the difference between the outer diameters, determine the consistency of the outer diameter of the calibration tooth and the precision-cut tooth. The outer diameter is expressed by the diameter difference of the calibration tooth. 4.3.2 Quick-crack instrument
Lever caliper or red-bar micrometer, zero-level micrometer, 4-level block. 4.4 Radial runout of calibration teeth and precision-cut teeth of the same size and rear guide 4.4.1 Testing method
Install the small part between the two tips of the optical dividing head or runout tester, with the indicator at the level of the band, and adjust the zero position of the indicator. Rotate it once, and the minimum change of the indicator pointer is the runout of the inspected part. 4.4.2 Testing instrument
Optical dividing head or circular motion tester, indicator with a graduation value of 0.001mm. 4.5 Radial runout of the outer circle of the remaining parts 4.5.1 Testing method
Check the radial runout of the outer circle of each part according to the requirements, and the method shall be in accordance with the provisions of 4.4,1. 1
.TR/T10231.7—2002
4.5.2 Testing equipment
The optical dividing head shall be a runout inspection instrument and an indicator with a graduation value of u.01mm. 4.6 Outer diameter of rough-cut and fine-cut teeth
4.6.1 Testing method
Use a zero-level micrometer to measure the teeth. The measured value is the actual outer diameter size of each tooth. 4.6.2 Testing equipment
Zero-level micrometer:
4.7 Tooth height difference of adjacent cutting teeth
4.7.1 Testing method
Use a zero-level micrometer to measure the outer diameter size of the cutting teeth. The difference in the actual outer diameter size of adjacent teeth is the actual tooth height difference. The difference between the actual value and the specified value is the difference between the adjacent cutting teeth. 4.7.2 Testing instrument
Military grade micrometer,
4.B The outer diameter of the front guide, rear guide and handle is measured with a micrometer. The measured reading is the actual outer diameter of the handle, 4.8.2, Testing instrument
The outer diameter is measured in thousandths.
4.9 Oblique runout of the precision traction surface
4.9.1 Testing method
Install the broach between the two tops of the optical dividing head or runout tester, install the indicator on the magnetic table frame, make the broach contact with the button 1, and measure the axis of the broach with the measuring table vertically, see Figure 1. The broach rotates one circle, and the difference between the maximum and minimum values ​​of the measuring table is 1
4.9.2 Testing equipment
Optical dividing head circular runout tester, indicating table with a typical value of 0.01mm. 4.10 Rake angle
4.10.1 Testing method
Inspect the calibration gear and the same cutting tool, and then directly measure the angle value with a ruler, and take the actual angle value. Before cutting: Due to the influence of the lifting angle, the measurement results need to be corrected. The measurement method must be adjusted with the universal angle ruler and the universal light table. Adjust the standard so that the tip of the ruler contacts the cutting tooth blade without any trace, and read the scale value of the dial. The angle of tooth lift is screened out according to the following formula: anA = HP
H--the pitch of the adjacent tooth on the broach surface
P--pitch. The actual front angle = measured value + tooth lift angle. JB/T10231.7-2002: The original universal negative ruler is 1.5. When checking the front angle, there is a shadow. In order to increase the required front angle, the width of the tool tip is reduced to 0.30.5mm. 4.10.2 Inspection requires an angle ruler. 4.11 Back angle 4.11.1 Inspection method To inspect the angle of the difficult tooth and the same size of the cutting tooth, you can use an angle ruler to directly measure it and read the actual angle α value. When measuring the back angle of the cutting tooth, the influence of the lead angle should be paid attention to. The measured value needs to be corrected. The negative end of the positive value is related to the direction of the broach and the measuring scale. bZxz.net
Figure 3. When measuring, the base scale and the top blade of the universal angle ruler are not equal. Adjust the vernier so that there is no gap between the flat end blade of the true scale and the back contact joint of the cutting tooth. The scale value on the dial is taken as the center. The tooth lead angle is calculated according to the following formula: Figure 3
JB/T10291.7-2002
H—Pulling force single-sided adjacent tooth tooth lead:
P tooth pitch.
tanAsH/P
Actual back angle α-measured value. — Tooth lead angle
In order to measure the degree of accuracy, the tip of the ruler is modified to a knife-edge type, and its accuracy is 0.3 mm~-0.5 mm. 4.11.2 Testing tool
Universal angle ruler.
4.12 Dimensions of slots
4.12.1 Testing method
Use mesh plate optical original method
4.12.2 Testing tool
Chip slot sample.
4.13 Material and hardness
The material and hardness standards shall comply with the provisions of JB/T10231.1-200U, Chapter 11. 4.14
Marking and packaging
The inspection of marking and packaging shall comply with the provisions of B/10231.1-2001, Chapters 13 and 14.
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