Standardize the drawing method of sheet metal (part) drawing and realize the rapid unification of sheet metal (part) drawing. 2. Drawing requirements 2. 1 Sheet metal drawing and part drawing must be drawn by the first angle projection method. Triangular drawings are not allowed to be distributed to workshops. Unless the customer's drawings are in picture format or PDF file format that is difficult to convert, the third angle view must be clearly marked, otherwise it will be implemented from the first angle. 2.2 The drawing method of holes in sheet metal drawings shall conform to the national standard "Drawing Method" and relevant regulations. 2.3 Generally, one drawing can only express one template. When the template (or foot pad) with the same function is divided into several parts, it should be drawn in the same drawing, and the total number of parts (such as how many feet) should be filled in the number column in the drawing frame. In addition, it should be numbered directly below the view to show the difference, such as CC- 1, CC-2, etc. If the materials of several parts are different, it is necessary. If several parts are made of the same material, just fill in the material column in the title bar of the drawing frame. 2.4 If there are multiple sheet metal parts (or parts) in the sheet metal drawing, you must copy the parts shared by * * * (which can be contracted) to the side of the sheet metal drawing, and indicate the part number directly below the copied view. Generally, special-shaped parts are numbered first, and * * * finally enjoy the part number. The circular part is in between. 2.5 Plane parts drawings generally only draw the top view of the parts (as a front view), and the unclear parts are partially sectioned. 2.6 The part drawing is based on the principle of clear expression, and the front view is generally copied directly from the template drawing. Do not rotate the mirror image except in special circumstances, and it is absolutely forbidden to put the copied view in the position of other views. The front view below the front view and the right view on the right meet the needs of expression. Determine whether to draw. Only one axial section can be drawn for the parts with pure circular punch and circular block, and the technical requirements of sheet metal parts can be omitted for the views with circular projection, involving appearance regulations such as materials, thickness, knife marks, crush injuries, scratches and burrs, and corresponding surface treatment and inspection standards. 2.8 For multi-bend parts, for parts with more holes, such as pressure riveting and sprouting holes, the pressure riveting holes (or sprouting holes) are marked with the symbol "A", and different types of pressure riveting, such as nuts and studs, are marked with different symbols, such as "A", "B" and "C", so as to clearly mark the numbers of corresponding specifications on the drawings and prevent employees from making mistakes. For many bends, use multiple views to clearly express the size of each bend. 3. Marking requirements 3. 1 All sheet metal drawings and parts drawings must be marked according to the operation standard of dimensioning. 3.2 When enjoying * * *, the template or part code of * * * must be marked with a lead in the main view. * * * The dimensions of sheet metal (parts) should be marked in the main view as far as possible. * * * When enjoying the parts for subsequent processing, duplicate views must be made. 3.3 The unfolded drawing must have the size of bending control, such as hole opposite side, hole-to-hole spacing, peripheral size, riveting hole number, budding hole number, etc. , so as to facilitate the quality control or operator inspection after NC blanking, avoid the wrong parts from flowing to the next working procedure and reduce losses. 4. This function menu is used to make a configuration Tu Tu frame corresponding to the sheet metal drawing for the part assembly drawing; Use the function menu to number the parts. The numbering shall be as horizontal as possible and vertical from top to bottom. If there is any confusion, you need to write the number of the same part, otherwise you can only mark one as a representative. The assembly requirements of parts can express the assembly relationship of each part, the number and model of parts to be purchased, the requirements for dimensional inspection and functional test of parts after assembly, and include the requirements for appearance. 5. Packaging Specification (packaging requirements for shipment) The design of cartons must undergo trial assembly and general damage test, and the consigned cartons can withstand drop and general drop tests. For the size of the carton, it is necessary to indicate the number of packages, the number of PE bags and the number of foam linings. All products shipped in the future are required to be marked on the outer boxes (unless special marks are provided by customers), and the contents of the marks are as follows: customer order number, customer box name, packaging quantity, production date, manufacturer's label printed and pasted, and the outer boxes that need environmental protection labels are labeled with environmental protection labels, which are signed or sealed by inspectors. Serial number combination method combines the advantages and disadvantages of equipment. The graphics requirement is 1. Rivet rivet gun is 1. There is no requirement for operating equipment (except compressed air).
2. Convenient operation and good fluidity.
3. No positioning homing 1. Salad holes and passages are required on the product.
2. The nail tail may interfere with other parts. Pict nail tail should have 8mm space to avoid the position.
The head should be equipped with pressure equipment such as a gasket with a diameter of 20mm, a nail gun and a budding self-riveting punch. 1. It can be self-guided without positioning.
2. For small-scale production, 1 can be made by hand. Salad holes and germination holes need to be made in the product, and the preliminary process is complicated. The center of Pict self-riveting hole is not less than 6mm3. 3-point spot welder 1. No pretreatment is needed, and the process is simple. There are pits on the inner and outer surfaces of spot welding, which need polishing and antirust treatment.
2. Fixture to be welded
3. The welding bonding force is small and easy to be separated. The center of Pict spot is not less than 6mm from the edge.
The center of the spot welding spot is not less than 8 mm from the bending edge. 4 TOX riveting machine and other pressure equipment 1. No pre-treatment is needed, and the process is simple.
2. The riveting combination effect is good
3. The riveting operation is convenient
4. No damage to the coating
1. Patent restrictions.
2. The distance from the riveting center of Pict shall be no less than 6mm.
Products should have internal positioning to ensure riveting effect.