Miniature bearing rolling process documents

Reduce process each content, in the form of written documents is a kind of process documents, process planning. General, guidance, process for the production of workers for operation and management of all kinds of technical documents belong to a fan process document. Many different kinds of process documents, different kinds of products and production, the format and detailed JianCheng also have very big difference. In the process of bearing production, process documents mainly include two categories: the dominant and direct service production file. Dominant files including blank drawing, inspection procedures, allowance and tolerance standards, work sequence diagrams, process technical conditions, clip ( The amount) List, cutting specification, etc; Direct service production files including process CARDS, process CARDS and process card, etc. 1. Blank drawing bad figure includes the content of the MAO: the various components of the blank graph, structure size tolerance, each surface sum spare quantity standard and processing methods. Table 1 - 1-4 to watch 6 is a bearing factory ring forging allowance and tolerance standard example. The allowance of the fee on the 14 free ( D) And male ( ) ( Unit: mm) Ring width finished pieces of outer diameter pieces of inner width diameter o D 45, 170. 5. 2. 5 3, 4. 0 2. 5 45 75 2, 5, 2. 5, 170 - 240 45 3 2. 5, 4, 5 3-45 75, 55667, 3. 5. 2. 5, 5, 240-5 330 G75 455667 5,5 3. 5, 566778, 75 = 110 6. 5 3,5 ≤75 30- 440 July 3. 5, 6, 5 75 8 4, 5, 7, 5:1. For a trestle enlarge hole pattern on the process, figure and tolerance than the table value reduced. 2. Check a place of tolerance with acid inside diameter tolerance of delta, delta c or outside diameter tolerance of delta p 15 on the extrusion pressure and upper die parts allowance ( D) And male ( △) ( Unit: mm) Food product acid degree of diameter D 20 pieces of outer diameter pieces of inner width 2, 5, 2. 5 to 1. 3 ≤50 20- 45. 2. 5 to 1. 3. 2. 5 50 - 80 1. 3 33 to 1. 3 21 - 45 3 1, 3, 3, 5 1. 45 3 1 1 1, 3, 5. 5. 3. 3, 5, 80-5 110 1. 5 d 45 1。 5: in regard to the forgings, value in the table should be appropriately increased.