Forming and stripping die

Abstract

The present application relates to a kind of forming material return mould, including upper die holder, male die, lower die holder, male die is installed below upper die holder, recessed die is installed on lower die holder, recessed die is provided with punch groove, male die is adapted with recessed die, recessed die periphery is equipped with material return mechanism, material return mechanism includes square fixed block and material return block, fixed block is fixed on recessed die by screw, one mounting hole is arranged in the side surface of fixed block, rotating shaft is installed in mounting hole, the front part in material return block is installed in the upper part position in the side surface of fixed block by rotating shaft, tension spring is arranged on the tail of fixed block, the upper end of tension spring is connected with upper die holder, a limit block is arranged below material return block.Using the above technical scheme, after stamping, the material return block head is pressed against the stamped part by the material return block driven by the upper die holder during the lifting process, so that the stamped part is separated from the male die, the rapid material return of the stamped part can be realized, the structure is simple, the operation is simple, and the stamping processing efficiency can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stamping die, in particular to a forming and material removing die. BACKGROUND

[0002] When manufacturing the retaining ring of the rim, stamping forming is needed, and stamping die is used. The material is put into the stamping die, and the raw material is stamped and formed by the punch. After stamping, the upper flared part of the retaining ring is prone to tightly hold the punch, causing material removing difficulty. Some existing stamping dies usually use a ring plus rubber ring material removing structure to realize the material removing of the workpiece. However, due to the special structure of the retaining ring, the ring material removing plate plus rubber structure has strong speciality and is not suitable for the material removing of the retaining ring. In addition, the rubber is prone to failure, causing insufficient material removing force and causing material clamping. The material removing operation process is complicated, and the rubber is prone to wear and tear, which needs to be replaced frequently, seriously affecting the production efficiency of the retaining ring. SUMMARY

[0003] The present application aims to provide a forming and material removing die which is simple in structure, convenient to operate, and can quickly remove the stamping part from the upper die, and aims to solve the problems of complex structure, inconvenient operation and low efficiency of the existing material removing mode.

[0004] The technical scheme adopted by the present application is: a forming and material removing die, comprising an upper die seat, a punch, and a lower die seat, the punch is installed below the upper die seat, a concave die is installed on the lower die seat, a punch groove is arranged on the concave die, the punch is matched with the concave die, a material removing mechanism is installed on the periphery of the concave die, the material removing mechanism comprises a square fixed block and a material removing block, the fixed block is fixed on the concave die by screws, an installation hole is arranged on the side surface of the fixed block, a rotating shaft is arranged on the front part of the material removing block, the material removing block is installed on the upper part of the side surface of the fixed block through the rotating shaft, the front end surface of the fixed block is close to the side wall of the punch when the fixed block is in a horizontal state, a tension spring is arranged on the tail of the fixed block, the upper end of the tension spring is connected with the upper die seat, the material removing block rotates up and down with the rising or falling of the upper die seat, the head end surface of the material removing block is flush with the edge of the punch groove on the lower die seat of the stamping die when the material removing block rotates downward to the limit; a limiting block is further arranged below the material removing block, the limiting block is fixedly installed on the upper surface of the concave die, the upper part of the limiting block is a slope, and the tail of the material removing block is pulled up, and the head of the material removing block rotates downward, and the bottom surface of the material removing block is stopped by the slope of the limiting block.

[0005] A further technical solution of the present application is that the lower die seat is provided with two-stage stepped circular grooves, the bottom is the first-stage groove, the upper part is the second-stage groove, the first-stage groove is provided with a pad, the diameter of the second-stage groove is larger than that of the first-stage groove, the bottom of the concave die is provided with a downward protruding mounting part, and the mounting part is matched with the second-stage groove and mounted in the second-stage groove.

[0006] A further technical solution of the present application is that the head top surface of the material returning block is provided as an inclined surface, the inclined surface is on the same surface with the inner wall of the upper half of the concave die when the tail of the material returning block is pulled up to the highest point by the tension spring, and the head of the material returning block can smoothly clamp the workpiece and separate the workpiece from the convex die while the tail of the material returning block is pulled up by the tension spring, so that the material returning is quickly realized, and the head of the material returning block does not hinder subsequent feeding.

[0007] A further technical solution of the present application is that the end surface of the fixed block facing the center of the concave die is kept apart from the edge of the concave die punching groove; the reserved space can ensure that the material returning block has enough rotating space, and at the same time, the reserved space can provide storage space for burrs or flanges generated when the workpiece is punched.

[0008] A further technical solution of the present application is that the tail of the material returning block is hinged with the tension spring; the tension spring can be conveniently installed or dismounted, and the maintenance of the tension spring is facilitated.

[0009] A further technical solution of the present application is that the upper die seat is provided with a screw hole, a tension spring mounting rod extending to the outside of the upper die seat is mounted in the screw hole, and the upper end of the tension spring is connected with the tension spring mounting rod; the installation and dismounting of the tension spring are facilitated.

[0010] The present application has the following advantages: due to the above technical solution, the forming material returning die can separate the punched part from the convex die by lifting the upper die seat to make the head of the material returning block press against the punched part after the punching is completed, so that the material returning of the punched part is realized quickly, the structure is simple, the operation is simple, and the punching processing efficiency can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic view of the forming material returning die of the present application;

[0012] Figure 2 is a structural schematic view of the fixed block of the present application;

[0013] Figure 3 is a structural schematic view of the material returning block of the present application. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] Example:

[0016] like Figure 1 , 2 A molding ejection die shown in Figure 3 ( Figure 1 The diagram shows the mold in the lowered state (left half) and the upper mold base in the raised state (right half). It includes an upper mold base 1, a punch 2, and a lower mold base 3. The punch is mounted below the upper mold base, and a die 4 is mounted on the lower mold base. The die 4 has a punch groove 41. The punch and die are compatible. A material ejection mechanism is installed around the die 4. The material ejection mechanism includes a square fixing block 5 and a material ejection block 6. The fixing block is fixed to the die 4 by screws. A mounting hole 51 is provided on the side of the fixing block. A rotating shaft is provided at the front of the material ejection block. The material ejection block 6 is mounted on the upper side of the fixing block via the rotating shaft. When the fixing block is in a horizontal state, its front end face is close to the side wall of the punch. A tension spring 7 is provided at the tail of the fixing block, and the upper end of the tension spring is connected to the upper mold base. The material ejection block rotates up and down as the upper mold base rises or falls. When the material ejection block rotates downwards to its limit, its head end face is... The edge of the punch groove on the lower die base of the stamping die is flat; a limiting block 11 is also provided below the ejector block, and the limiting block 11 is fixedly installed on the upper surface of the die cavity. The upper part of the limiting block is an inclined surface. After the tail of the ejector block is pulled up and its head rotates downward, the bottom surface of the ejector block is supported by the inclined surface of the limiting block. Without the limiting block, the ejector block can stop rotating by supporting the upper surface of the die cavity with its head. Since stamping is a high-frequency action, the contact area between the bottom of the ejector block and the die cavity is very small, which can easily cause wear on the ejector block and the die cavity. Wear on the ejector block can lead to the inability to complete the ejection process, and the surface of the die cavity is easily damaged. After adding the limiting block, the supporting and limiting effect of the inclined surface of the limiting block can accurately limit the ejector block. The limiting block can effectively avoid the ejector block directly impacting the surface of the die cavity. At the same time, the limiting block and the ejector block are in surface-to-surface contact, which can effectively reduce the wear of the ejector block and effectively improve the service life of the equipment.

[0017] In the stamping process, the upper die holder of the stamping die reciprocates up and down, the punch installed below the upper die holder performs stamping forming on the workpiece. During the stamping process, the tension spring is in a stretched state when the upper die holder is lifted, the tail of the material return block is pulled up by the tension spring, the head of the material return block rotates downward until it is stopped by the limiting block, at this time the head of the material return block is located at the edge of the upper die holder, the stamping process starts by placing the workpiece to be stamped into the die hole, and then the stamping action starts. With the descent of the upper die holder, the tension spring changes from the stretched state to the natural stretched state, the tail of the material return block is subjected to a reduced tension force of the tension spring, and when the upper die holder descends to the lowest point, the material return block is in a horizontal state, the head end surface of the material return block is close to the side wall of the punch. Since the stamped part has a certain thickness, the stamped part will be clamped in the die hole by the material return block at this time. With the rising of the upper die holder, the end surface of the stamped part is separated from the punch by the material return block, and the material return is achieved. The entire material return process is achieved by the movement of the upper die holder, and manual material return by workers is not required, which can greatly improve the processing efficiency.

[0018] The lower die holder is provided with two-stage stepped circular grooves, the bottom is a first-stage groove, and the upper part is a second-stage groove. The first-stage groove is provided with a pad 10. The diameter of the second-stage groove is larger than that of the first-stage groove. The bottom of the concave die is provided with a downward protruding mounting portion which is adapted to and mounted in the second-stage groove. The stability of the concave die mounting can be improved, and the concave die can be ensured not to be displaced in a high-frequency and high-intensity working environment during use, thereby improving the precision and stability of the entire die.

[0019] The head top surface of the material return block is provided with an inclined surface which is on the same plane as the inner wall of the upper half of the concave die when the tail of the material return block is pulled up to the highest point by the tension spring. While the tail of the material return block is pulled up by the tension spring, the head of the material return block can smoothly clamp the workpiece and separate the workpiece from the punch, thereby achieving rapid material return and preventing the head of the material return block from hindering subsequent material feeding.

[0020] The end surface of the fixed block facing the center of the concave die is spaced apart from the edge of the die hole. The reserved space can ensure that the material return block has sufficient rotating space up and down, and can provide storage space for burrs or flanges generated during stamping of the workpiece.

[0021] The tail of the material return block is hinged to the tension spring. The tension spring can be conveniently installed or removed, and the maintenance of the tension spring in the later stage is facilitated.

[0022] The upper die holder is provided with a screw hole in the side surface, and a tension spring mounting rod 8 extending outward from the upper die holder is installed in the screw hole. The upper end of the tension spring is connected with the tension spring mounting rod. The installation and removal of the tension spring are facilitated.

[0023] Preferably, the rotating shafts on the material returning blocks extend to both sides of the material returning blocks respectively, and the material returning blocks are provided with fixing blocks on both sides respectively, and the rotating shafts extending out of the material returning blocks are respectively installed in the mounting holes on the fixing blocks so that the material returning blocks are clamped by the two fixing blocks. This mounting mode can improve the stability of the material returning blocks.

[0024] The principle of use is as follows: before the mold works, the mold is first adjusted to align the centers of the upper and lower molds, and then the stamping forming process can be performed; the forming material returning mold in the embodiment can be used for the red stamping forming and cold stamping forming continuous process of the workpiece 9, and after the red stamping forming of the workpiece is completed, the workpiece is immediately taken out and placed in the cold stamping forming mold, a pressure of 18-23 Mpa is applied to the workpiece, and after the stamping, the formed workpiece is obtained.

[0025] Before the workpiece 9 is placed, the upper mold is in a rising state, the tension spring is in a stretched state, the material returning block is inclined downward, and the head of the material returning block is topped to the upper surface of the concave die. At this time, the workpiece to be stamped and formed can be smoothly placed in the concave die of the mold, and after the feeding is completed, the stamping process is started, and the upper mold is pressed down.

[0026] During the pressing process of the upper mold, the material returning block gradually rotates and swings upward, and after the pressing of the upper mold is completed, the tension spring approaches a free state, and at this time, the material returning block is flat. After the stamping of the workpiece is completed, the upper mold is raised, and if the workpiece is stuck to the mold, the end surface of the workpiece will top the material returning block 6 when reaching a certain position, so that the workpiece and the stamping convex die are separated to realize material returning. With the rising of the mold, the tension spring is in a stretched state, and the material returning block swings around the rotating shaft, so that the material returning block and the workpiece have a gap at the set position, and the workpiece can be freely ejected from the concave die to realize material taking. The device changes the method of using a circular ring material returning plate and rubber material returning, and has a simple structure and is convenient to operate.

[0027] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A forming scrapback die characterized by: The utility model provides a punch die, including upper die holder, male die, lower die holder, male die is installed below upper die holder, and the recessed die is installed on lower die holder, and the recessed die is provided with punch groove, male die is matched with recessed die, the recessed die periphery is installed with material return mechanism, and material return mechanism includes square fixed block and material return block, the fixed block is fixed on the recessed die through screw, and one mounting hole is arranged on the side surface of fixed block, the rotating shaft is arranged on the front part of material return block, and material return block is installed on the side surface of fixed block through rotating shaft and is located in the upper part, when the fixed block is in horizontal state, the front end surface of fixed block is close to the side wall of male die, and the tail of fixed block is provided with tension spring, and the upper end of tension spring is connected with upper die holder, material return block rotates up and down along with the ascending or descending of upper die holder, when material return block rotates downward to the limit, the head end surface of material return block is level with the edge of punch groove on the lower die holder of punch die, a limiting block is further arranged below material return block, and the limiting block is fixedly installed on the upper surface of recessed die, the upper part of limiting block is inclined surface, the bottom surface of material return block is pressed by the inclined surface of limiting block after the tail of material return block is pulled up and the head of material return block rotates downward, and the top surface of material return block head is inclined surface, and the inclined surface is on the same plane with the inner wall of recessed die upper half when the tail of material return block is pulled up to the highest point by tension spring.

2. The forming blank mold of claim 1, wherein: The lower die holder is provided with two-stage stepped circular grooves, the bottom is the first-stage groove, and the upper part is the second-stage groove, the first-stage groove is provided with a pad, and the diameter of the second-stage groove is larger than that of the first-stage groove, the bottom of the recessed die is provided with a downward protruding mounting part, and the mounting part is matched with the second-stage groove and is installed in the second-stage groove.

3. The forming scrap die of claim 1, wherein: The end surface of the fixed block towards the center of the recessed die is kept apart from the edge of the punch groove.

4. The forming blank mold of claim 1, wherein: The tail of the material return block is hinged with the tension spring.

5. The forming scrap die of claim 1, wherein: The side surface of the upper die holder is provided with a screw hole, a tension spring mounting rod extending outward from the upper die holder is installed in the screw hole, and the upper end of the tension spring is connected with the tension spring mounting rod.

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