Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 8776-1998
Carbide Circular Milling Cutter for Woodworking
Published on July 17, 1998
National Bureau of Machinery Industry
Implemented on December 1, 1998
Appendix A of this standard is the appendix of the standard.
This standard is approved by the National Technical Committee for Standardization of Machine Tools and Cutting Tools. This standard is under the jurisdiction of the Orange State Woodworking Machine Tool Research Institute. This standard was drafted by Harbin Second Tool Co., Ltd. The main drafters of this standard are Wei Liquan, Zheng Guobang, He Wu, Zheng Zongjian, and Fu Yujuan. 1 Scope
Machinery Industry Standard of the People's Republic of China
Woodworking Carbide Circular Milling Cutters
JB/T8776-1998
This standard specifies the types and dimensions, technical requirements, test methods, inspection regulations, and marking, packaging, and storage of carbide circular milling cutters (hereinafter referred to as circular milling cutters).
This standard applies to convex, concave half-country and 1/4 convex, concave milling cutters with a radius R of 8 to 30 mm. 2 Referenced Standards
The provisions contained in the following sub-clauses constitute the text of this standard by reference in this standard. The versions shown are valid when this standard is published. All standards will be subscribed. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB 699-88 bZxz.net
High quality steel technical parts
Special properties GB1257-90 Safety of woodworking machine tools JB611392
YB849-75
3 Types and sizes
Safety technical parts for woodworking machine tools
Hard steel grades
3.1 The types are divided into half-circle concave half-leaf knives, 1/circle and 1/4. 1.1.1 The types and sizes of convex semicircular chain knives shall comply with the provisions of Table 1 and Table 1. 3.1.2 The types and sizes of T semicircular knives shall comply with the provisions of Table 2 and Table 2. 3.1.31/4 convex distance element step and size according to the specification of Figure 3, 1.41/4 concave arc knife type and size according to Figure 4 and Table 4. Approved by the Machinery Industry Bureau on July 17, 1998 and implemented on December 1, 1998
JB/TB776
Figure convex semicircular knife
Table 1 Semicircular size
P(S15)
JB/T8776—1998
Ma 2 return semicircular force
Li 2 Semicircular selection
B(JS5)
JB/T87761998
National 31/4 convex nipple force
Table 3 1/4 convex arc blade size
±0,43
JB/T8776—1998
Thai 3 (finished)
(JS153
National 41/4 round-cut tool selection
±0,50
Table 41/4 concave box to milling size
DUS15)
B(FS1)
+D, 021
3.2 Marking example
D(JS1S)
JB/T 8776—199R
Table 4 (research)
E(JS15)
The convex semi-circular knife R20140+40*30YG with a radius of 20mm, an outer diameter of 140mm, a blade width of 40mm and a diameter of 30mm is selected from high-quality alloy convex semi-circular knives. It meets the technical requirements of JB/T8776-19984.
The knife surface must not have defects such as punctures, smears, blade scratches, and grinding scratches that affect its performance. 4.1
4.1 The maximum allowable value of the surface roughness of the selected tool shall comply with the following provisions: a) The cutting edge surface of the general tool is R3.2m: b) The surface of the hole and the two supporting surfaces are R125m4.1 The position tolerance shall comply with the provisions of Table 5,
The tool position tolerance shall comply with the provisions of Table 5. The two supporting surfaces of the moving tool are parallel to the shaft diameter specification of the light shaft.
d2-125
4.4 The steel part of the milling cutter shall be made of YG8 in accordance with YB849 or hard alloy with performance not lower than that of the material. The milling cutter shall be made of 45 in accordance with GB699 or carbon steel with performance not lower than that of the material. 4.5 The safety technology of the milling cutter shall comply with the following provisions and shall also comply with the provisions in B6113. 4.5.1 The milling cutter shall be dynamically balanced according to the provisions of B9239. Permissible unbalance em.-5.3060
X10)(g·mm/kg)
Permissible unbalance: upu=Meu（gmm）Cutter mass, kgr
Where,
Working speed of milling cutter, r/min,
JB/T87T6—1998
4.5.2 The shear strength of the support shall not be less than 120MPa4.5.3 The maximum working speed shall be indicated on the milling machine.
5 Test method
The performance test of the milling cutter shall be carried out on a machine that meets the standard of mechanical properties, and all safety requirements shall be in accordance with the provisions of B1255. 5.1
5.2 Test material Use a medium hardness material with a moisture content of 12% to 15%. 5.3 Test uniform cutting specifications are shown in Table 6.
Table 6 Test uniform cutting specifications
Comb knife cabinet
118~-128
132-·142
-52~172
Selected guard speed
10G0K~-0
70(0~60Gm
Burial age extension
5.4 After the test, there shall be no obvious shearing and slacking phenomenon, and it can continue to be used. 6 Inspection rules
6.1 The measurement method of the blunt knife position shall comply with the provisions of Appendix A (Standard Appendix) and the length
6.2 The selected knives shipped from the factory shall meet the requirements of this standard, and the unified knife acceptance method of the batch factory shall be implemented according to the relevant standards. Marking, packaging and storage
7. 1 Marking
7.1. The chain knives shall be marked with: manufacturer’s trademark, round radius, cutter tooth material brand and maximum operating speed. 7.1.2 The packaging tray of standard knives shall be marked with: product name, standard number, manufacturer’s name, factory name and trademark, cutter’s round radius, outer diameter, blade width, hole name, cutter tooth material brand, year and month of manufacture. 7.1.3 The packaging box shall be marked with: product name, overall dimensions, gross weight, “wetproof” and “handle with care”. 7.2 Packaging
7.2.1 The knives shall be treated with anti-corrosion treatment before packaging, and the quality of the knives after packaging can be guaranteed not to be damaged during operation and maintenance. 7.2.2 The packaging tray shall be accompanied by a certificate of conformity.
Blunt knives shall be stored in a well-ventilated, non-leafy warehouse. Serial number
Inspection method
JB/T8776 199R
(accurate recording)
Measuring method of the position tolerance of carbide driving iron tool in this machine. Measurement method
All the methods are as follows: the special milling cutter is guided
and the experience of the war can be solved by the fixed center. When the mesh is in the two moving
material cutter, the two main bearings face
the end face of the hole on the axis
the two support ends are parallel to the flow
isolated At the same time, the percentage gauge head is placed on the cutting edge of the milling cutter. After that, the milling cutter is turned for the first time, and the maximum difference between each previous milling cutter is read out. Then the maximum difference between each previous milling cutter is obtained. The above process is repeated. The door is installed between the two areas of the milling cutter, and the percentage gauge head is placed on the milling cutter. The third one is the most important one in the whole process. After that, the blue tool is turned to the perimeter of the dial indicator. Then the above method is used to check the tool. The tool is placed on the platform with a percentage indicator for easy measurement. The support end of the actual turning tool is ground, and the mobile table frame is inspected. The dial indicator is collected. The largest and smallest secretion is the same, the printing is for reading the first door parallel seat male measurement method is still drawing guide axis shaft matching axis inflammation direction card check and, 3.OT degree of white meter, mouth meter case 0.01 scale value of the percentage package, percentage meter beam, platform
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