JB/T 9168.2-1998 JB/T 9168.2-1998 General process code for cutting Turning JB/T9168.2-1998 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 cutting
Common process instructions for cutting1998-11·16issued
National Machinery Industry Standard
199812-01implemented
Machinery Industry Standard of the People's Republic of China
Common process instructious forcnlling-Process instructiony fur lurningThis standard defines the basic technical specifications that should be implemented in turning processing and is applicable to all enterprises. Turning processing should also comply with the provisions of JBT0168.1. 2 Reference standards
FB/T9168.2-1998bzxZ.net
Release date JE/Z307.2-6B
The provisions contained in the following standards shall constitute the provisions of this standard through reference in this standard: At the time of publication of this standard, the versions shown are all current. All standards are subject to revision. Parties using this standard shall consider the sustainability of the following standard versions. JR/T915.1-1s9 General process code for cutting 3 Clamping of turning tools
3.1 The tool bar and tool holder of the turning tool should not be too long. The general length should not be 1.5 times the tool height (except for the turning hole, etc.). 3.2 The center of the tool cup should be perpendicular or parallel to the direction of travel. 3.3 Adjustment of tool height
3.3.1 Under the following conditions, the tool should generally be aligned with the center line of the workpiece a) Turning the end face:
3) Rate maintenance;
c) Turning:
d) Before forming,
e) Cutting off solid workpieces.
3.3.2 Under the following conditions, the tip should generally be slightly higher or equal to the center of the workpiece:
b) Precision turning of holes.
3.3.3 Under the following conditions, the tool tip should generally be slightly lower than the center line of the workpiece.
3) Turning holes;
b) Cutting hollow workpieces.
3.4 ​​The bisector of the tool tip should be the same as the center line of the workpiece. 3.5 When installing the tool, the pad should be small and flat, and the screw should be pressed tightly. 4.1 When using a three-wheeled plate to load the workpiece, if the diameter of the workpiece is less than or greater than 303, its extension length should not be greater than 5 times the diameter. If the diameter of the workpiece is greater than 3) mm, its overhang length should not be greater than 1 to 3 times the diameter. 4.2 When using a non-chuck, a faceplate, an angle iron plate, etc. to clamp irregular weights, a counterweight must be added. 4.3 When using a workpiece with a pointed axis, the center of the seat should be adjusted to the center line of the main spindle before cutting. 9168.2-[598
4.4 When the two parts are used as the long axis, the force of the lifting or centering unit is used. During the processing, the force of the dead center and the centering unit should be adjusted. The sliding of the dead center and the centering unit should be paid attention to.
4.5 When using the seat, the vertical adjustment should be made as much as possible to reduce the sweeping motion. 4.6 When clamping the workpiece with a small support surface and a high height on the stand, a heightened clamp should be used, and a tie rod or pressure should be added at the appropriate position to tighten the workpiece.
4. When turning the wheel, the unprocessed surface should be aligned to ensure that the wall thickness of the workpiece is uniform after processing. 5 Turning Processing
5.1 When turning the front step, in order to ensure the rigidity during turning, the part with larger diameter should be turned first, and the part with smaller diameter should be turned later. 5.2 When cutting on the workpiece, it should be done before fine turning to prevent deformation of the two parts. 5.3 When cutting the workpiece with thread pattern, the threadless part should be fine turned after the thread pattern processing. 54 The end face of the workpiece should be turned flat before drilling, and the center hole should be drilled first if necessary. S.5 When drilling deep holes, generally the guide hole should be drilled first
5. When drilling holes with diameters of 0~0mm, the diameter of the tool bar should be the same as the diameter of the hole to be drilled. When machining holes with diameters greater than nm, a small force bar should generally be used. 5. When turning strips or multi-head screws, a trial cut should be made after adjusting the wheel. 5.8 When using an automatic lathe, the relative position of the tool and the workpiece must be adjusted according to the machine tool adjustment card. After adjustment, a test run must be carried out before processing. During processing, attention must be paid to the distance between the tool and the size and surface finish of the workpiece. 5.9 When turning on a vertical lathe, the crossbeam must not be moved at will after the tool holder is adjusted. 5.10 When the workpiece and the relevant mounting surfaces have position tolerance requirements, the turning must be completed in one clamping. S.11 When turning the same gear tooth, the hole and the reference end face must be clamped in one clamping. If necessary, a gauge line should be drawn near the broken wheel pitch circle of the end face.
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