JB/T 9168.12-1998 JB/T 9168.12-1998 General process code for cutting and marking JB/T9168.12-1998 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
Machinery Industry Standard of the People's Republic of China
Common process Instructlons forcuttingProceka instrurtiuns fur laying uulThe technical standard defines the cost-effectiveness of the cutting process and is suitable for the starting point in machine manufacturing. Marking shall comply with the provisions of J1/T9183.1. 2 Referenced Standards JB/T9168.12-1998 JB/23n7.12-88 The following standards contain texts which, by reference in this standard, constitute non-articles of this standard. The version shown in this standard is valid at the time of publication. All standards are subject to revision. Parties reading and using this standard should explore the possibility of using the following new versions. JBT9168.:1998 Cutting Process Code 1-1996 3 Related Technical Principles 3.1 Surface marking Quick-fitting flat plate Marking in reverse order in the two coordinate systems of the worker. 4.2 Body
The alignment of the workpiece within the standard system, 3.3 The line
The line of the machine waiting for the machine to be opened, the line of the machine to be connected, etc. 3.1 Finished product
The line of the finished product.
J.5 The line of the station end to determine the relative position of each part. 3.6 The line
is drawn on the surface of the workpiece as the processing boundary. 3.7 The line
is drawn on the workpiece to find its correct position on the machine tool. 3.8 The inspection line
is drawn on the workpiece to check the line or the processing pin to correct the silicon. 3.9 Ruler line
The workpiece processing center's added second line or inspection line extends to the non-processing part and becomes the section line of the designated part. 3.10 Auxiliary line
The lines other than the post line 1, such as our line inspection line, ruler lead line, etc. are all potential lines. 3.11 Push center second surface
The ideal plane of the actual center plane.
[Guohao Machinery City Industrial Bureau approved 199·1116 1998-12-01 implementation
JR/T9168.FZ-1998
Note, the actual center plane. The corresponding points on the two corresponding actual tables are composed of the midpoints of the lines. 3.12 Borrowing materials
When marking, for the defective (or two pieces) with partial sinking, under the condition of total margin, the defective is outside the marking line. Instructions,
4 Preparation before marking
1, the marking platform should be kept clean. The bottom of the two used for marking should be cleaned and pulled clean, and the arrangement should be aligned. 4.2 Understand the long process of the drawing modification and clarify the end line work. 4.3 Check the shape and size of the rough (semi-finished) surface to see if they are consistent with the requirements of the drawings and work documents, and whether there are obvious defects in the appearance. 4.4 Do a good job of cleaning the marking area.
4.5 Remove the color of the marked area. wwW.bzxz.Net
5 Requirements for commonly used marking tools
5.1 Marking platform (three-board)
5 Small! The marking platform should be regularly inspected and adjusted according to relevant regulations. The size should be kept in a state of 10. The working degree should be within the 3 paper fluting degree specified in 1B/7971. 5.1.2 The large platform should not be frequently marked with small pieces to avoid partial rust. 5..3 Keep the table surface clean. There should be no sand, iron filings, or other objects. 5.1, 4 [. Tools should be placed gently. It is forbidden to pick up and hit the table surface. 5.1.5 When not in use, the surface should be rust-proof. 5. 2 Marking, marking rules
5.2.1 When marking castings and forgings, a marking line with a low-quality metal should be used and kept light. The width of the marking line should be within 0.1 ~0.15mm.
5.2.2 When marking concave and T-shaped surfaces, a spring key or high-speed steel stylus should be used, with the stylus tip angle of 15~2°. The line of the marking should be within the range of 5~0.1mm.
5.2.3 The stylus and stylus disc used for marking and semi-finished products should not be used in accordance with the specifications. The stylus disc should be removed and the parts should be sorted out.
5.3 The stylus selected in pairs should be marked. It is not allowed to be used individually. 6 Selection of marking datum
6.1 Selection of general principle
) The marking datum should first be considered to be consistent with the design datum b) For workpieces with three surfaces that have been marked, the processed surface should be selected as the line datum. ) When there is no marked working surface on the rough surface, first select the sitting surface to be held (or the large one is not added as the marking reference, 6.2 Flat rain marking reference then select
) Use two vertical center lines as the reference; h) Use two perpendicular lines, among which... is the center line as the reference:) Use the vertical line that overlaps the two cases as the reference. 6.3 Stereoscopic line datum selection: Use three perpendicular center planes as datum 3: Use: mutually perpendicular planes, two of which are the correct center planes as the standard:) Use three mutually perpendicular planes as datum 4. When referring to vertical planes, one of which is the datum center plane and the difference standard:) Use three mutually perpendicular planes as datum 1. The roughness is also correct and the material is borrowed JB/T9168.121998 7.1 Half outer average line, generally the machining allowance distribution of the surface can be guaranteed 72. For the roughness of the rear part, the method of borrowing can be used to make up for it, and the proofing and punching service 8.1 The parts of the work line should be proofed and punched, and should be basically evenly distributed. The spacing between the straight part is larger and the spacing between the curved part can be smaller. 8.2 Center loading, excavation loading, size lead wire, matching space record inspection scorpion and other auxiliary loading, stock should be punched and bullet punched, 8.3 Sample punching should be used to find the center and lead center line of the material point 5
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