Stamping terminology
(1) terminology of stamping process
1: Blanking: It is a stamping process that separates materials along a closed contour, and the separated materials become workpieces or working parts, mostly planar.
2. Deep drawing: It is a stamping process that changes a flat blank or a process part into a hollow part, or further changes the shape and size of the hollow part. In deep drawing, the center piece is mainly formed by the material outside the bottom of the punch flowing into the die.
3. Forming: it is a stamping process that changes the shape and size of the workpiece little by little depending on the flow of materials to ensure the accuracy of the workpiece.
4. Punching: the punching process of separating the waste from the material or workpiece along the closed contour to obtain the required hole in the material or workpiece.
5. Hole turning: it is a stamping process that turns the material around the inner hole into a side flange.
6. Trimming: It is a stamping process that uses the edge of stamping die to trim the hill to make it have a certain diameter, a certain height or a certain shape.
7. Flanging: It is a stamping process, which will be turned into a short edge along the contour curve.
(2) Terminology of stamping, grinding and stamping die parts
1. Lower die: it is the lower part of the whole set of dies, that is, the stamping die part installed on the workbench of the press.
2. Lower die holder: it is a plate-shaped part on the ground of the lower die, and its work is directly fixed on the pad of the press table.
3. Upper die: it is the upper part of the whole set of dies, that is, the die part installed on the slide block of the press.
4. Upper die holder: It is a plate-shaped part to which the upper die is attached. When working, it is close to the slide block of the pressure gauge and fixed with the slide block of the press through the die handle or directly.
5. Punch: it is a graphic working part that plays a direct role in forming stamping parts, that is, a part that plays a working face outside.
6. Die: it is a concave working part that directly forms the stamping part, that is, the part with the inner shape as the working surface.
7. Blank holder: It is a part used to hold down stamping materials or process parts to control the material flow in the stamping die. In drawing die, the blank holder is mostly blank holder.
8. Punching rib: It is a rib-like protrusion used to control the material flow in the drawing die or drawing die. Blanking can be a local structure of the sliding blank holder of the die, or an independent part embedded in the die or blank holder.
9. Slope of the cutting edge: it is the slope of each side of the cutting edge wall of the punching die hole.
10, sidewall: it is the slope of each side of the sidewall of the punching die hole.
1 1. guide plate: it is a plate-shaped part with an inner hole, which is accurately matched with the punch, guided by the inner hole to ensure the mutual alignment of the punch and the die, and has the function of discharging.
12. Guide post: a cylindrical part that provides accurate guidance for the relative movement of the upper and lower die holders, which is mostly fixed on the upper die holder and used in conjunction with the guide sleeve.
13. Guide sleeve: a tubular part that provides accurate guidance for the relative movement of the upper die holder and the lower die holder, most of which are fixed in the upper die holder and used in conjunction with the guide sleeve fixed in the lower die holder.
14. Positioning pin: it is a part that ensures the position of the workpiece in the mold unchanged, and it becomes a positioning pin or a positioning plate due to different shapes.
15. Scrap knives: There are two kinds:
1) is a cutter installed on the flange trimming die of deep drawing parts, which is used to cut off the whole circle of trimming waste for easy removal.
2) A cutter in the shape of a press or a die is used to stably cut off the strip-shaped waste for easy removal.
16. Limit column: it is a cylindrical part that limits the distance between the upper die seat plane and the lower die seat plane after clamping.
17. Leaky hole: directly connected with the hole of the blanking die, used to send out waste or process parts.
(III) Terminology of stamping process
1, lower pole: it is the lower end point of the up-and-down movement of the press slider.
2. Upper pole: it is the upper end point of the up-and-down movement of the press slider.
3. Workpiece: It is a stamping part that has completed the grid process specified in the process document.
4. Workpiece: It is a stamped blank, but it needs further stamping.
5. Burr: It is a sharp protrusion on the edge of the blanking section after blanking.
6. Closing height: the distance from the upper plane to the lower plane of the upper die holder when punching the lower rod at the working position.
7. Stamping parts: refers to the blank after one or more stamping processes, that is, the system of process parts and workpieces.
8. glossy surface: It is the bright part of the blanking part.
9. Springback: There are two kinds: one is the difference between the size of the forming punch after it is taken out of the mold and the corresponding size of the mold. For curved parts, it is generally expressed by angle difference or radius. The other is the difference between the external size of stamping parts and the corresponding female die size, or the corresponding difference between the internal size and male die.
10, stroke: the distance between the two ends of the press slider moving up and down.
1 1. gap: it refers to the difference of the corresponding dimensions of the mating male die and female die or the gap between them.
12, mold trial: it is the actual trial stamping after the initial assembly of the mold to assess the performance of the mold and the quality of stamping parts.
13. Pull mark: it is the friction mark between the material surface and the working surface of the die during the forming process of stamping parts.
14. Plate: It is a plate-like raw material, which can be used for multiple stamping parts.
15. feeding device: it is a device that feeds raw materials into the mold. The common feeding forms are only tube shaft type, clamping type and hook type.
16. Wrinkling: it is the name of the phenomenon that the flange of a drawing piece produces wavy wrinkles.
17. Punch knife: it is the name of the peeling phenomenon of the cutting edge of punch or die.
reference data
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China Automotive Technology Forum? Manufacturing technology? Stamping terminology