CN108555142A - Diel and Sheet Metal Forming Technology - Google Patents

Abstract

The invention discloses a stamping die and a stamping process, belonging to the technical field of stamping forming. The stamping die includes an upper extruding punch and a lower extruding punch, the lower end surface of the upper extruding punch is provided with an inwardly recessed first annular groove, and the upper end surface of the lower extruding punch is also provided with an inwardly recessed The second annular groove, the sum of the depth of the first annular groove and the depth of the second annular groove is equal to 0.2 ± 0.05mm, the width of the first annular groove and the second annular groove are equal and greater than the width of the strip . Such a structure can ensure that the materials around the first annular groove and the second annular groove gather to the inside of the first annular groove and the second annular groove during the stamping process, so that a 1.9mm material strip can be punched out of a 2.1mm The product meets the product thickness requirement. The invention has the advantages of simple structure, short processing period and low cost, and the common standard material belt can produce products meeting the demand through the stamping and extruding process of the stamping die.

Description

Stamping die and stamping process

technical field

The invention relates to the technical field of stamping forming, in particular to a stamping die and a stamping process.

Background technique

Compared with castings and forgings, stamping parts have the characteristics of thinness, uniformity, lightness and strength. Stamping can produce workpieces with ribs, ribs, undulations or flanges that are difficult to manufacture by other methods to increase their rigidity. Due to the use of precision pneumatic devices, the precision of the workpiece can reach the micron level, and the repeatability is high, and the specifications are consistent, and holes, bosses, etc. can be punched out. Among the steel products in the world, 60%-70% are plates, most of which are stamped into finished products, such as car bodies, chassis, mailboxes, radiator fins, boiler drums, container shells, motors, electrical appliances Iron core silicon steel sheets, etc. are all stamped, and there are also a large number of stamped parts in products such as instruments and meters, household appliances, bicycles, office machinery, and living utensils.

At present, the thickness tolerances of steel strips in various steel mills are very large, which cannot meet the requirements of ring products at all. Most materials are negative tolerance, such as: 304 stainless steel 2.0mm material, the actual material thickness is only 1.9mm. Ring products require a positive tolerance of 2.0mm, and special materials with a tolerance of more than 2.1mm are required. And the price of ordering this special material is high, the cycle is long, and the cost of ring products is doubled, which is uneconomical and low in practicability.

Contents of the invention

The object of the present invention is to provide a stamping die and a stamping process to solve the problem that the prior art cannot meet the thickness requirements of ring products.

In order to achieve the above purpose, the following technical solutions are provided,

The stamping die provided by the present invention includes an upper extruding punch and a lower extruding punch, the lower end surface of the upper extruding punch is provided with an inwardly recessed first annular groove, the lower end of the extruding punch The upper end surface is also provided with an inwardly recessed second annular groove, the sum of the depth of the first annular groove and the depth of the second annular groove is equal to 0.2±0.05mm, and the first annular groove and the depth of the second annular groove are equal to 0.2±0.05mm. The width of the second annular groove is equal to and greater than the width of the strip.

Further, the stamping die is provided with a plurality of corresponding upper extrusion punches and lower extrusion punches.

Further, it also includes an upper stripping plate and a lower template, the upper extruding punch is pierced in the upper stripping plate, and the lower extruding punch is pierced in the lower template.

Further, it also includes an upper mold base and a lower mold base, the upper mold base is connected to the upper mold base, the upper stripping plate is connected to the lower surface of the upper mold base, and the lower template is connected to the lower mold base. The upper surface of the mold base.

Further, it also includes an upper backing plate and a lower backing plate, the upper backing plate is connected between the upper mold base and the upper stripping plate, and the upper extrusion punch is connected to the lower backing plate of the upper backing plate. surface; the lower backing plate is connected between the lower die base and the lower template, and the lower extrusion punch is connected to the upper surface of the lower backing plate.

Further, it also includes an upper clamping plate and a lower cushion block, the upper clamping plate is connected between the upper cushioning plate and the upper stripping plate, and the upper extruding punch is set in the upper clamping plate; The lower cushion block is connected to the lower surface of the lower mold base.

Further, it also includes a baffle plate and a lower supporting plate, the baffle plate is connected between the upper clamping plate and the upper stripping plate, and the upper extruding punch passes through the baffle plate; The lower supporting plate is connected to the lower surface of the lower pad, and the lower supporting plate is installed on the lower formwork.

Further, the material strip is horizontally passed between the upper extruding punch and the lower extruding punch by a traction mechanism.

Further, the stamping die is also provided with a limiting mechanism in the middle of the material strip to limit the horizontal movement of the material strip.

The present invention also provides a stamping process. In the stamping process, an extruding process is added, and the extruding process is the pair of upper presses set on the upper stripping plate on the stamping die described in any one of the above technical solutions. The extrusion punch exerts a pressure perpendicular to the surface of the strip, and at the same time, the corresponding lower press on the lower template applies a pressure perpendicular to the surface of the strip to the bottom extrusion punch. When the upper extrusion punch and the When the lower extruding punch exerts sufficient pressure on the strip, the material in the protrusions of the upper extruding punch (1) and the lower extruding punch (2) will be squeezed into the first annular recess groove (101) and the second annular groove (201).

Compared with the prior art, in the stamping die and stamping process provided by the present invention, a first annular groove recessed inward is provided on the lower end surface of the upper extrusion punch, and an inwardly concave groove is provided on the upper end surface of the lower extrusion punch. Depressed second annular groove, the sum of the depth of the first annular groove and the depth of the second annular groove is equal to 0.2 ± 0.05mm, the width of the first annular groove and the second annular groove are equal and greater than that of the strip Width, such a structure can ensure that the material around the first and second annular grooves gathers to the inside of the first and second annular grooves during the stamping process, so that a 1.9mm material strip can be punched out of 2.1 mm products meet the high requirements of product thickness. The invention has the advantages of simple structure, short processing period and low cost, and the common standard material belt can produce products meeting the demand through the stamping and extruding process of the stamping die.

Description of drawings

Fig. 1 is a schematic structural view of a stamping die in Embodiment 1 of the present invention;

Fig. 2 is the enlarged view of place A in Fig. 1;

Fig. 3 is a cross-sectional view of the first annular groove of the upper extruding punch in the first embodiment of the present invention when punching a strip.

Reference signs: 1-upper extrusion punch; 101-first annular groove; 2-lower extrusion punch; 201-second annular groove; 3-upper die seat; 4-upper backing plate; 5- Upper splint; 6-stop baffle; 7-upper stripping plate; 8-lower formwork; 9-lower backing plate; 10-lower mold base;

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

As shown in Figure 1, the stamping die provided by the present invention includes an upper stripping plate 7, an upper mold base 3, an upper backing plate 4, an upper clamping plate 5, a stop plate 6, a lower template 8, a lower mold base 10, and a lower backing plate 9. The lower pad 11, the lower supporting plate 12, and a plurality of upper extruding punches 1 and a plurality of lower extruding punches 2 arranged in one-to-one correspondence. Upper mold base 3 is installed on the upper mold frame, for fixing the whole upper mold device. The upper backing plate 4 is connected to the lower surface of the upper die base 3 for installing the upper punch press. The upper splint 5 is connected to the lower surface of the upper backing plate 4 for connecting and fixing the upper extruding punch 1 . The stop plate 6 is connected to the lower surface of the upper clamping plate 5 for further connecting and fixing the upper extruding punch 1 . The upper stripping plate 7 is connected to the lower surface of the stopper plate 6 for fixedly installing the upper extruding punch 1 . The lower supporting plate 12 is installed on the lower mold frame for fixing the whole lower mold device. The lower cushion block 11 is connected to the upper surface of the lower supporting plate 12, and is used to increase the height of the lower template 8, which is easy to feed materials. The lower mold base 10 is connected to the upper surface of the lower cushion block 11 for installing and fixing the lower punch press. The lower backing plate 9 is connected to the upper surface of the lower die base 10 for connecting the lower extruding punch 2 . The lower template 8 is connected to the upper surface of the lower backing plate 9 for fixedly installing the lower extruding punch 2 .

Further, the upper extruding punch 1 is connected through the upper stripping plate 7, the stop plate 6 and the upper clamping plate 5, connected to the lower surface of the upper backing plate 4, and connected with the upper punch press. Because the upper extrusion punch 1 is under downward pressure and has its own gravity, it needs multi-layer reinforcement to ensure that the bearing capacity is large enough. The lower extruding punch 2 is installed in the lower template 8, connected with the upper surface of the lower backing plate 9, and connected with the lower punch press. Further, as shown in FIG. 2 and FIG. 3 , the lower end surface of the upper extrusion punch 1 is provided with a first annular groove 101 sunken inward, and the upper end surface of the lower extrusion punch 2 is also provided with an inward sunken groove 101 . The second annular groove 201, the sum of the depth of the first annular groove 101 and the depth of the second annular groove 201 is equal to 0.2 ± 0.05mm, the width of the first annular groove 101 and the second annular groove 201 is equal to and greater than The width of strip 13. The material strip 13 is horizontally passed between the upper extruding punch 1 and the lower extruding punch 2 through the traction mechanism. Further, the stamping die is also provided with a limit mechanism in the middle of the strip 13 to limit the strip 13 to keep moving horizontally. Specifically, the traction mechanism includes two sets of traction assemblies arranged in parallel, wherein one set of traction assemblies includes a first traction motor, the first traction motor is arranged on one side of the discharge direction of the stamping die, and the output shaft of the first traction motor is connected with The driving gear, the side of the feeding direction of the stamping die is provided with a driven gear corresponding to the driving gear, the driving gear and the driven gear are connected by a chain drive, and the other set of traction components has the same structure as the above traction components, and the material belt 13 is drawn by two parallel chains and moves from the feed end to the discharge end. The position-limiting structure is a blocking piece arranged on the outside of the chain surface, and is used to limit the inclination of the material belt 13 to the outside of the chain.

In the stamping die provided by the present invention, an inwardly recessed first annular groove 101 is provided on the lower end surface of the upper extrusion punch 1, and an inwardly recessed second annular groove is provided on the upper end surface of the lower extrusion punch 2. 201, the sum of the depth of the first annular groove 101 and the depth of the second annular groove 201 is equal to 0.2 ± 0.05mm, the width of the first annular groove 101 and the second annular groove 201 are equal and greater than the width of the strip 13 , such a structure can ensure that the material around the first annular groove 101 and the second annular groove 201 gathers to the inside of the first annular groove 101 and the second annular groove 201 during the stamping process, so as to achieve a material strip of 1.9mm 13 Punch out a 2.1mm product to meet the product thickness requirement. The invention has the advantages of simple structure, short processing period and low cost, and the ordinary standard material strip 13 can be manufactured to meet the demand through the stamping and extruding process of the stamping die.

Embodiment two

The present invention also provides a stamping process. In the stamping process, an extruding process is added. The extruding process is to punch the upper extruding material through the upper punch press set on the upper backing plate 4 on the stamping die provided in Embodiment 1. The head 1 exerts a pressure perpendicular to the surface of the strip 13, and at the same time, the corresponding lower punch press on the lower die base 10 applies a pressure perpendicular to the surface of the strip 13 on the lower extrusion punch 2, when the upper extrusion punch 1 When the material belt 13 is exerted enough pressure by the lower extrusion punch 2 and the upper extrusion punch 1 and the lower extrusion punch 2, the material in the protrusions of the upper extrusion punch 1 and the lower extrusion punch 2 will be squeezed into the first annular groove 101 and the second annular groove. In the groove 201.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. A stamping die, characterized in that it comprises an upper extruding punch (1) and a lower extruding punch (2), the lower end surface of the upper extruding punch (1) is provided with an inwardly recessed first An annular groove (101), the upper end surface of the lower extruding punch (2) is also provided with an inwardly recessed second annular groove (201), the depth of the first annular groove (101) is the same as The sum of the depths of the second annular groove (201) is equal to 0.2±0.05mm, and the width of the first annular groove (101) is equal to that of the second annular groove (201) and is larger than the strip (13 ) width. 2. The stamping die according to claim 1, characterized in that, the stamping die is provided with a plurality of corresponding upper extrusion punches (1) and lower extrusion punches (2). 3. The stamping die according to claim 1, characterized in that, it also includes an upper stripping plate (7) and a lower template (8), and the upper extruding punch (1) is set on the upper stripping plate ( 7), the lower extrusion punch (2) is set in the lower template (8). 4. stamping die according to claim 3, is characterized in that, also comprises upper mold base (3) and lower mold base (10), and described upper mold base (3) is connected on the upper mold frame, and described upper mold base The stripping plate (7) is connected to the lower surface of the upper mold base (3); the lower template (8) is connected to the upper surface of the lower mold base (10). 5. The stamping die according to claim 4, further comprising an upper backing plate (4) and a lower backing plate (9), the upper backing plate (4) being connected to the upper die base (3) and the upper stripping plate (7), the upper extrusion punch (1) is connected to the lower surface of the upper backing plate (4); the lower backing plate (9) is connected to the lower die Between the seat (10) and the lower template (8), the lower extrusion punch (2) is connected to the upper surface of the lower backing plate (9). 6. The stamping die according to claim 5, characterized in that, it also comprises an upper clamping plate (5) and a lower pad (11), and the upper clamping plate (5) is connected to the upper clamping plate (4) and the Between the upper stripping plates (7), the upper extruding punch (1) is pierced in the upper splint (5); the lower pad (11) is connected to the lower mold base (10) lower surface. 7. The stamping die according to claim 6, characterized in that, it also comprises a stop plate (6) and a lower supporting plate (11), and the stop plate (6) is connected to the upper clamping plate (5) and Between the upper stripping plates (7), the upper extruding punch (1) is set in the stop plate (6); the lower supporting plate (12) is connected to the lower pad ( 11) on the lower surface, and the lower supporting plate (12) is installed on the lower formwork. 8. The stamping die according to any one of claims 1-7, characterized in that, the material strip (13) is arranged horizontally through the upper extrusion punch (1) and the lower extrusion punch through a traction mechanism between the heads (2). 9. The stamping die according to claim 8, characterized in that, the stamping die is further provided with a limiting mechanism in the middle of the material strip (13) to limit the horizontal movement of the material strip (13). 10. A stamping process, characterized in that a material extrusion process is added in the stamping process, and the material extrusion process is passed through the upper stripping plate (7) on the stamping die described in any one of claims 1-9. The set upper press applies a pressure perpendicular to the surface of the strip (13) to the upper extrusion punch (1), while the corresponding lower press on the lower template (8) applies a vertical pressure to the lower extrusion punch (2). The pressure on the surface of the material strip (13), when the upper extrusion punch (1) and the lower extrusion punch (2) exert a sufficient pressure on the material strip (13), it will The material in the protrusions of the upper extruding punch (1) and the lower extruding punch (2) is extruded into the first annular groove (101) and the second annular groove (201).