JB/T 9168.3-1998 JB/T 9168.3-1998 General process code for cutting Milling JB/T9168.3-1998 Standard download decompression password: www.bzxz.net

Ks 25.020
Machinery Industry Standard of the People's Republic of China
JB/T9168.1~9168.13-1998
Common process instructions for cutting1998-11·16 Issued
National Machinery Industry Standard
199812-01 Implementation
" Scope
Machinery Industry Standard of the People's Republic of China
Common process instructions for eutting.- Process instractinns for millingThis standard defines the basic rules that should be followed in eutting.- Process instractinns for milling, and is applicable to the pre-milling processing of various enterprises. In milling, the provisions of JB/T 9168. 1 should be followed. 2 Referenced Standards
JH/T 9166.3-1998
Generation J/2sn7.5-86
The following standards contain relevant documents, which are referenced in this standard and constitute the relevant provisions of this standard. 4 When the standard is issued, the versions shown are valid. All standards will be revised. The parties using this standard should consider the possibility of using the following standards to update the performance. JB/9168.1-199A Cutting 1. General principles of cutting technology 3 Selection and use of milling cutters wwW.bzxz.Net
3.1 Selection of milling cutter diameter and number of teeth
3.1.1 The diameter of the milling cutter should be selected according to the milling width and depth. Generally, the larger the cutting width and depth, the deeper the milling cutter diameter should be. 31.2 The number of milling cutter teeth should be selected according to the workpiece material and processing requirements. Generally, when milling plastic materials, use fine teeth: when milling flexural materials or semi-rigid materials, use medium and fine teeth milling cutters. 3.2 Installation of milling cutters
3.2. When working on a horizontal machine, keep the milling cutter as close to the spindle as possible without affecting the position. When the cutter needs to be far away from the spindle, a movable bracket should be installed between the spindle and the machine. 3.2.2 When installing a milling machine on a vertical machine, a short tool bar can be selected without affecting the milling speed. After the tool is installed, a dial indicator should be used to check the radial movement and end movement of the blunt tool when necessary. 3.2.3
3.2.4 If two tools are used to mill a wide plane at the same time, two tools with opposite thread directions should be selected. 4. Differential clamping of workpieces
4.! When installing
4.1.1 Ensure the correct position of the flat-nose pliers on the workbench. When necessary, use a dial indicator to align the pliers surface so that it is parallel or vertical to the movement direction of the machine table.
4.1.2 The bottom of the workpiece should be properly parallel to the workpiece. When clamping, the workpiece should be close to the workpiece. 4.1.3 The positive part should not be too high above the pin or extend out of the wrong end to prevent vibration during sharpening. 4.2 Requirements for using the dividing head
4.2, "When installing the workpiece on the dividing head, the dividing head should be locked first. When tightening, use the pipe to change the bridge and apply force. 4.22 Adjust the main axis of the dividing head. After 4 years, the 4 screws on the upper part of the base should be turned to prevent the parts from moving. 4.2.3 When the two types of work are carried out between the dividing head and the base, the center line of the previous start should be adjusted. 4.2.4 When the dividing head is divided, the indexing head should be moved according to the sense period--if the position is too tight, it needs to be brought to the correct position through the inner cover. The original reason is eliminated.
National Machinery Industry Exhibition 199B1116 batch adjustment
1998-12-01 On-site
JB/T 9168.3—1998
4.2.5 When dividing, slowly insert the positioning pin of the lower car into the hole of the indexing plate. Do not cut off the hand suddenly to avoid damaging the indexing plate. 5 Milling machine
5. After adjusting the machine tool, the direction of movement should be locked. 5.2 When the machine is moving, the normal feed speed should be collected before approaching the workpiece to prevent the knife from interfering with the workpiece. When selecting the machine, the selected hanging light should be used for testing. Check whether the process and the screw are correct. After passing the test, the little finger should be added. 5.3
When milling the forming blunt force, use a high force tool. The milling machine is 25% to 20% of the roundness of the milling machine. When using the profiling method to form the surface, the mold and the mold should be kept in good condition. The pressure should not be too large, so that the machine can rotate. 5. 6
When cutting, the cutter should be as close as possible to increase the cutting accuracy. 5. 7
5.6 Selection of forward and reverse milling systems
5.8.1 In the following cases, reverse milling is recommended:) When the wire support of the bed worktable is inconvenient to adjust;) When the workpiece surface is lumpy, or the surface of the upper part is uneven; d) When the workpiece material is hard; e) When milling; f) When the cutting depth is large; 5.8.2 In the following cases, it is recommended to use the forward milling system: e) When the sample is not easy to be fixed or thin and long; b) When cutting bakelite, plastic, organic glass and other materials;
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