Positioning and clamping structure for progressive die

Abstract

The utility model discloses a positioning and clamping structure for a progressive die. A groove is formed in the bottom face, close to the feeding side, of a stripper plate of the progressive die, an elastic pre-pressing piece is arranged in the groove, a limiting piece is arranged on a lower die part, a plurality of guide pins are arranged on an upper die part, and at least one guide pin is a movable guide pin. The movable guide needle comprises an upper needle, a spring, a lower movable cavity and a halfpace head. The elastic pre-pressing piece is arranged on the feeding side of the stripper plate, so that the elastic pre-pressing piece firstly presses the feeding side of the material belt before the whole stripper plate is pressed to the material belt, the material belt is fixed, and possible displacement of the material belt is reduced. The movable guide needle is adopted, when guide holes in a material belt of a guide needle cylinder start to make contact, the guide needle can deviate to a certain degree, force applied to the material belt is reduced, meanwhile, through the frustum type design of the front end, the better centering effect can be achieved, and the alignment precision is improved. In addition, a limiting piece is arranged at the feeding end of the material belt, so that the material belt can be centered and leveled more conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to die technical field, concretely is a kind of positioning clamping structure for progressive die. BACKGROUND

[0002] Progressive die is a kind of high-efficiency multi-station stamping die, its core feature is that punching, blanking, bending, drawing and other multiple processes are completed in turn by different stations in the stroke of press machine. It adopts strip material continuous feeding, and each step corresponds to a station, finally forms complex parts, and is suitable for batch production of small, thin and complex-shaped parts. In the stamping process of progressive die, the material strip will be warped due to its own elasticity. At present, the stripper plate is used to press the material strip before stamping in the die head. However, for some thin materials, the downward pressure of the stripper plate at a relatively high speed is easy to cause the displacement of the material strip, affecting the quality of the final product. In addition, the progressive die is currently positioned by a guide pin. In the stamping process, for some materials with soft texture, the guide pin is easy to cause deformation of the guide hole of the material strip, affecting the quality of the subsequent product. SUMMARY

[0003] The utility model aims at providing a positioning clamping structure for progressive die to solve the problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model provides a positioning clamping structure for progressive die. The progressive die includes an upper die part and a lower die part. The upper die part includes an upper seat, an upper die head pad and a die head, and a stripper plate. The lower die part includes a lower seat, a lower die head pad and a lower die head, and a plurality of guide columns. The stripper plate is provided with a groove on the bottom surface of the side close to the feeding. An elastic pre-pressing piece is arranged in the groove. The bottom surface of the elastic pre-pressing piece protrudes from the bottom surface of the stripper plate. Under the action of pressure, the bottom surface of the elastic pre-pressing piece can be compressed into the groove.

[0005] Preferably, a limiting piece is arranged on the upper part of the lower die head pad of the lower die part, close to the feeding side. The limiting piece includes a bottom plate and lateral limiting convex strips arranged on both sides of the upper part of the bottom plate. The distance between the two lateral limiting convex strips is slightly greater than the width of the material strip.

[0006] Preferably, the limiting piece further includes a feeding limiting unit. The feeding limiting unit is two bolts. The distance between the screw rods of the two bolts is slightly greater than the width of the material strip. Alternatively, the feeding limiting unit includes two bolts, a pressing rod and a fixed nut. Two through holes are arranged on both sides of the bottom plate. The lower part of the bolt is inserted into the through hole and cooperates with the fixed nut. A through hole is arranged on the screw column of the bolt. The pressing rod passes through the through holes of the two bolts.

[0007] Preferably, a plurality of guide pins are arranged on the upper die pad and die, and a guide pin through hole is arranged on the lower die pad at the corresponding position; at least one movable guide pin is arranged in the guide pins; the movable guide pin comprises an upper pin, a spring and a lower movable cavity; the upper pin is an integral structure comprising a nut part, a threaded connecting part and a guide rod part, a thread is arranged on the outer side of the threaded connecting part, and the guide rod part is arranged at the lower part of the threaded connecting part and has an outer diameter smaller than that of the threaded connecting part; the spring is sleeved on the outer side of the guide rod part, the upper part is fixed with the threaded connecting part, and the lower part is fixed with the top of the lower movable cavity; the upper part of the lower movable cavity is provided with an opening, the upper part of the opening is a stepped hole, and the lower part is a circular hole; the inner diameter of the upper part of the stepped hole is larger, the inner diameter of the bottom part is the same as that of the circular hole, and the inner diameter of the circular hole is matched with the outer diameter of the guide rod part.

[0008] Preferably, the movable guide pin further comprises a stepped head; the stepped head is a reverse stepped structure, the upper part has a larger outer diameter than the lower part, the top is provided with a stud, and the detachable connection of the reverse stepped structure is realized by matching the stud with the threaded hole at the bottom of the lower movable cavity.

[0009] Preferably, a convex column is arranged at the lower part of the stepped head.

[0010] Preferably, a plurality of cutting surfaces are arranged at the upper part of the stepped head and the lower part of the lower movable cavity.

[0011] Preferably, a containing groove is arranged at the area through which the movable guide pin passes on the bottom of the stripping plate, the upper part of the guide pin through hole of the lower die pad is also provided with a containing groove with a larger size, the lower part of the guide pin through hole is provided with a positioning circular hole, and the positioning circular hole has a size matched with the convex column.

[0012] The positioning and clamping structure for progressive die disclosed by the utility model can realize the fixation of the material belt by arranging the elastic pre-pressing piece on the side of the stripping plate close to the feeding side before the whole stripping plate is pressed to the material belt, and then the whole stripping plate is pressed to the material belt, so that the displacement of the material belt can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of the embodiment of the utility model.

[0014] Figure 2 is an exploded view of the embodiment of the utility model.

[0015] Figure 3 is the face view of the feeding limiting unit of another embodiment of the utility model.

[0016] Figure 4 is the guide needle area amplification schematic view of another embodiment of the utility model.

[0017] Figure 5 is the guide needle amplification schematic view of another embodiment of the utility model. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be apparently and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] As shown in the accompanying Figures 1-5 The progressive die of the utility model relates to an upper die part A, a lower die part B, the upper die part includes an upper seat A1, an upper die head gasket and a die head A2, a stripper plate 1, the lower die part B includes a lower seat B1, a lower die head gasket and a lower die head B2, a plurality of guide columns C. The specific structure of the upper die part A, the lower die part B and the guide column C is the conventional knowledge in the field of progressive die, and the specific structure does not belong to the protection scope of the present application. The related structure in the drawings of the present application, including but not limited to the specific structure, quantity, layer number and material of the upper seat A1, the upper die head gasket, the die head and the stripper plate 1, does not constitute the limitation to the technical scheme of the patent.

[0020] The Figure 2 The bottom surface of the elastic pre-pressing part 12 is protruded from the bottom surface of the stripper plate 1. The elastic pre-pressing part 12 has good elasticity, and the bottom surface thereof can be compressed into the groove 11 under the action of pressure. Through the setting of the elastic pre-pressing part 12, the elastic pre-pressing part can press the material belt on the side of the material feeding before the whole stripper plate is pressed onto the material belt L, so that the material belt is pressed against the lower die part, and the fixation of the material belt is realized. Then, the whole stripper plate is pressed onto the material belt, so that the displacement of the material belt can be reduced.

[0021] A limiting part 2 is arranged on the upper die head gasket of the lower die part, close to the side of the material feeding. The limiting part includes a bottom plate 21, a lateral limiting convex strip 22 and a material feeding limiting unit 23. The lateral limiting convex strip 22 is arranged on the upper part of the bottom plate 21 on both sides, and the distance between the two lateral limiting convex strips 22 is the width of the material belt, which is used for limiting the movement of the material belt in the width direction. The material feeding limiting unit 23 is arranged on the front part of the bottom plate 21, as shown in the accompanying Figure 2As shown, the feed limiting unit 23 is two bolts, the distance between the screw rods of the bolts is slightly larger than the material belt, in use, the bolts are tightened to the appropriate height, the lower end surface of the nut of the bolt can limit the vertical jumping of the material belt.

[0022] The Figure 3 Another embodiment of the feed limiting unit 23 provided in the present application includes two bolts 231, a pressing rod 233, and a fixed nut 232, two through holes are arranged on both sides of the bottom plate 21, the lower part of the bolt 231 is inserted into the through hole and cooperates with the fixed nut 232, a through hole is arranged on the stud of the bolt 231, and the pressing rod 233 passes through the through holes of the two bolts 231. The vertical jumping of the material belt is limited by the pressing rod 233.

[0023] A plurality of guide pins 3 are arranged on the upper die pad and the die A2, guide holes 30 are arranged on the material belt, and guide pin through holes are arranged at the corresponding positions of the lower die pad. In use, the guide pins 3 pass through the guide holes 30 and are inserted into the guide pin through holes during the clamping of the mold. Figure 5 As shown, the technical scheme of the movable guide pin 3 of the present application is provided. At least one movable guide pin 31 is arranged on the upper die pad and the die A2.

[0024] As shown, Figure 4 , 5 As shown, the movable guide pin 31 includes an upper pin 311, a spring 312, a lower movable cavity 313, and a ladder head 314.

[0025] The upper needle 311 is an integral structure, comprising a screw cap part a1, a threaded connection part a2 and a guide rod part a3. The threaded connection part a2 is located at the lower part of the screw cap part a1, and a thread (not shown in the figure) is arranged on the outer side of the threaded connection part a2, which is used to fix the movable guide needle 31 on the upper die head base plate and the die head A2. The guide rod part a3 is arranged at the lower part of the threaded connection part a2, and the outer diameter of the guide rod part a3 is smaller than that of the threaded connection part a2. The screw cap part a1, the threaded connection part a2 and the guide rod part a3 are coaxial. The spring 312 is sleeved on the outer side of the guide rod part a3, and the upper part of the spring 312 is fixed with the threaded connection part a2, and the lower part of the spring 312 is fixed with the top of the lower movable cavity 313. The upper part of the lower movable cavity 313 is provided with an opening, and the upper part of the opening is a stepped hole b1, and the lower part of the opening is a circular hole b2. The inner diameter of the upper part of the stepped hole b1 is larger, and the inner diameter of the bottom part is the same as that of the circular hole. The inner diameter of the circular hole is matched with the outer diameter of the guide rod part a3, and the inner diameter of the circular hole is slightly larger than the outer diameter of the guide rod part a3. The stepped head 314 is a reverse stepped structure, and the outer diameter of the upper part is larger than that of the lower part. A threaded hole is arranged on the top of the stepped head 314, and the threaded hole is matched with the threaded hole on the bottom of the lower movable cavity 313 to realize the detachable connection of the reverse stepped structure. Further, a convex column 3141 is arranged on the lower part of the stepped head 314, which is matched with the guide needle through hole at the corresponding position of the lower die head base plate. A plurality of cutting surfaces q are arranged on the upper part of the stepped head 314 and the lower part of the lower movable cavity 313, which are used for tightening when the threaded connection is performed between the two.

[0026] In order to avoid the interference of the stepped head 314 during the clamping process, the accommodation groove r is arranged on the area through which the movable guide needle 31 of the stripper plate 1 passes at the bottom of the stripper plate 1. Figure 4 The dashed circle frame in the figure shows the schematic diagram of the accommodation groove r on the bottom surface of the stripper plate 1. The upper part of the guide needle through hole 315 of the lower die head base plate is also provided with a larger size accommodation groove r, which is used to accommodate the stepped head 314. The lower part of the guide needle through hole is provided with a positioning circular hole r1, and the size of the positioning circular hole r1 is matched with the convex column 3141.

[0027] It should be noted that, unless otherwise clearly specified and limited, the terms such as "mounting", "connecting", "connecting", "fixing", "arranging" and the like should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A positioning and clamping structure for a progressive die, the progressive die comprising an upper die portion and a lower die portion, the upper die portion comprising an upper seat, an upper die head pad and a die head, and a stripper plate, the lower die portion comprising a lower seat, a lower die head pad and a lower die head, and a plurality of guide pillars, characterized in that, The stripper plate has a groove on the bottom surface near the feed side, and an elastic pre-compression member is installed in the groove. The bottom surface of the elastic pre-compression member protrudes from the bottom surface of the stripper plate, and the bottom surface of the elastic pre-compression member can be compressed into the groove under pressure.

2. The positioning and clamping structure for a progressive die according to claim 1, characterized in that, A limiting component is provided on the upper part of the lower die head pad plate near the feed side. The limiting component includes a base plate and lateral limiting protrusions. The lateral limiting protrusions are arranged on both sides of the upper part of the base plate, and the distance between the two lateral limiting protrusions is the width of the material strip.

3. The positioning and clamping structure for a progressive die according to claim 2, characterized in that, The limiting component also includes a feeding limiting unit, which consists of two bolts, with the distance between the opposite edges of the bolt threads slightly greater than that of the material strip; or the feeding limiting unit includes two bolts, a pressure rod, and a fixing nut, with two through holes provided on the base plate on both sides of the material strip, the lower part of the bolts being inserted into the through holes to cooperate with the fixing nut, and through holes provided on the studs of the bolts, with the pressure rod passing through the through holes of the two bolts.

4. The positioning and clamping structure for a progressive die according to claim 1, characterized in that, A plurality of guide pins are provided on the upper die head pad and the die head, and guide pin through holes are provided at corresponding positions on the lower die head pad; at least one of the guide pins is a movable guide pin; the movable guide pin includes an upper pin, a spring, and a lower movable cavity; the upper pin is an integral structure including a nut part, a threaded connection part, and a guide rod part, the threaded connection part is provided with threads on the outside, the guide rod part is located at the lower part of the threaded connection part, and its outer diameter is smaller than the outer diameter of the threaded connection part; the spring is sleeved on the outside of the guide rod part, the upper part is fixed to the threaded connection part, and the lower part is fixed to the top of the lower movable cavity; the upper part of the lower movable cavity is provided with an opening, the upper part of the opening is a trapezoidal hole, and the lower part is a round hole, the upper inner diameter of the trapezoidal hole is larger, the bottom inner diameter is the same as the inner diameter of the round hole, and the inner diameter of the round hole matches the outer diameter of the guide rod part.

5. The positioning and clamping structure for a progressive die according to claim 4, characterized in that, The movable guide pin also includes a ladder head; the ladder head is an inverted ladder structure, with the upper outer diameter being larger than the lower diameter, and a stud is provided on the top, which cooperates with the threaded hole at the bottom of the lower movable cavity to achieve a detachable connection of the inverted ladder.

6. The positioning and clamping structure for a progressive die according to claim 5, characterized in that, A protruding column is provided at the lower part of the ladder platform.

7. The positioning and clamping structure for a progressive die according to claim 5, characterized in that, Several cross-sections are provided on the upper part of the ladder head and the lower part of the lower movable cavity.

8. The positioning and clamping structure for a progressive die according to claim 6, characterized in that, A receiving groove is provided in the area through which the movable guide pin passes at the bottom of the stripper plate. A larger receiving groove is also provided above the guide pin through hole of the lower die head pad. A positioning round hole is provided below the guide pin through hole, and the size of the positioning round hole matches the convex post.

Images