Double-sided chamfering device

Abstract

The utility model provides a double-face chamfering device which comprises an upper die and a lower die, and a pre-punching upper male die, a front face chamfering upper male die, a fine punching upper male die, a reverse face chamfering upper male die and a front face shaping upper male die are sequentially arranged in the upper die. A pre-punching lower female die, a front face chamfering lower female die, a fine punching lower female die, a reverse face chamfering lower male die and a front face shaping lower male die are arranged at the positions, corresponding to the pre-punching upper male die, the front face chamfering upper male die, the fine punching upper male die, the reverse face chamfering upper male die and the front face shaping upper male die, in the lower die respectively. According to the utility model, the processing problem of the collision plate product with the double-sided chamfer through hole is solved, the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of progressive die processing, in particular to a double-sided chamfering device. Background Art

[0002] The progressive die is a more advanced die in the current production and processing. It combines multiple dies together and integrates the functions of multiple single-process dies, thus realizing continuous automated production of multiple processes. It has the advantages of good processing quality, high production efficiency, and less operator requirements. It is a major direction of mold design development at this stage. Figure 1 The double-sided strike plate product shown is an important component of the intelligent precision lock in the intelligent security system. The strike plate is provided with a number of square or round through holes, and chamfered structures are provided on both sides of the through holes. The through holes on the traditional strike plate are only chamfered on one side, and the processing is relatively simple. However, the processing of the new double-sided strike plate product is difficult due to the difficulty in designing the mold tool, and machining is usually required. The use of machining is not only costly, but also has low production efficiency. Therefore, it is necessary to invent a double-sided chamfering device for progressive dies. Utility Model Content

[0003] The utility model aims to provide a double-sided chamfering device which can be used in a progressive die to solve the processing problem of a collision plate product with a double-sided chamfered through hole, reduce production costs and improve production efficiency.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A double-sided chamfering device, comprising an upper die and a lower die, wherein the upper die is provided with a pre-punching upper punch, a front chamfering upper punch, a fine punching upper punch, a reverse chamfering upper punch, and a front shaping upper punch in sequence, and the lower die is provided with a pre-punching lower die, a front chamfering lower die, a fine punching lower die, a reverse chamfering lower die, and a front shaping lower die at positions corresponding to the pre-punching upper punch, the front chamfering upper punch, the fine punching upper punch, the reverse chamfering upper punch, and the front shaping upper punch;

[0006] The pre-punching upper punch extends into the pre-punching lower die hole of the pre-punching lower die after the die is closed, and punches a through hole on the material strip;

[0007] The lower end of the front chamfer upper punch is provided with a front chamfer, and the front chamfer punches out an upper chamfer on the inner wall of the through hole after the mold is closed;

[0008] The fine punching upper punch extends into the fine punching lower die hole of the fine punching lower die after the die is closed, and punches out the flange on the inner wall of the through hole;

[0009] The lower end of the reverse chamfer upper punch is provided with an upper positioning chamfer for cooperating with the upper chamfer for positioning, and the side of the reverse chamfer lower punch is provided with a reverse chamfer, and the reverse chamfer punches out a lower chamfer on the inner wall of the through hole after the mold is closed;

[0010] The side of the front shaping upper punch is provided with an upper shaping chamfer, and the upper end of the front shaping lower punch is provided with a lower positioning chamfer for cooperating with the lower chamfer for positioning.

[0011] Furthermore, the upper die includes an upper die seat, and an upper pad and an upper fixed plate which are sequentially stacked and fixed below the upper die seat, and the pre-punching upper punch, the front chamfering upper punch, the fine punching upper punch, and the front shaping upper punch are all fixedly arranged in the upper fixed plate; the lower die includes a lower die seat, and a lower fixed plate and a lower concave template which are sequentially stacked and fixed above the lower die seat, and the pre-punching lower concave template, the front chamfering lower concave template, the fine punching lower concave template, the reverse chamfering lower concave template, and the front shaping lower concave template are all fixedly arranged in the lower concave template.

[0012] Furthermore, an upper unloading structure is provided in the upper die, and the upper unloading structure includes an upper unloading back plate and an upper unloading plate hung on the upper fixed plate, the upper unloading back plate is fixedly connected to the upper unloading plate, the pre-punching upper punch, the front chamfering upper punch, the fine punching upper punch, and the front shaping upper punch all pass through the upper unloading structure and are movably connected to the upper unloading structure, and the reverse chamfering upper punch is fixedly arranged in the upper unloading plate.

[0013] Furthermore, an upper ejector rod is movably provided in the upper die, an upper end of the upper ejector rod is in contact with an upper spring, and a lower end of the upper ejector rod is in contact with an upper unloading back plate.

[0014] Furthermore, a lower shaping boss is provided at the upper end of the reverse chamfer, and the lower shaping boss extends into the through hole after the mold is closed.

[0015] Furthermore, an upper shaping boss is provided at the lower end of the upper shaping chamfer, and the upper shaping boss extends into the through hole after the mold is closed.

[0016] Furthermore, a first blanking hole is provided in the lower die at a position below the pre-punching lower die hole.

[0017] Furthermore, a second blanking hole is provided in the lower die at a position below the fine punching lower die hole.

[0018] The beneficial effects of the utility model are as follows: the utility model can ensure the deformation of the two planes of the product and the dimensional accuracy of the chamfers on both sides by sequentially arranging five groups of stamping structures, namely pre-punching, front chamfering, fine punching, back chamfering and front shaping, in the progressive die, thereby simplifying the design and processing of the mold, being suitable for mass production, improving production efficiency and greatly reducing production costs.

[0019] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a product structure diagram of the utility model.

[0021] Figure 2 It is a top view of the product strip in the utility model.

[0022] Figure 3 It is a cross-sectional view of a double-sided chamfering device of the utility model in an open state.

[0023] Figure 4 It is a cross-sectional view of a double-sided chamfering device of the utility model in a closed state.

[0024] Figure 5 It is an enlarged view of the matching structure of the pre-punching upper punch and the pre-punching lower die in the utility model.

[0025] Figure 6 It is an enlarged view of the matching structure of the front chamfering upper punch and the front chamfering lower concave die in the utility model.

[0026] Figure 7 It is an enlarged view of the matching structure of the fine punching upper punch and the fine punching lower die in the utility model.

[0027] Figure 8 It is an enlarged view of the matching structure of the reverse chamfering upper punch and the reverse chamfering lower punch in the utility model.

[0028] Fig. 9 It is an enlarged view of the matching structure of the front shaping upper punch and the front shaping lower punch in the utility model. DETAILED DESCRIPTION

[0029] like Figure 3 and Figure 4 A double-sided chamfering device shown in the figure comprises an upper die 10 and a lower die 20, wherein the upper die 10 is provided with a pre-punching upper punch 31, a front chamfering upper punch 32, a fine punching upper punch 33, a reverse chamfering upper punch 34, and a front shaping upper punch 35 in sequence, and the lower die 20 is provided with a pre-punching lower die 41, a front chamfering lower die 42, a fine punching lower die 43, a reverse chamfering lower punch 44, and a front shaping lower punch 45 at positions corresponding to the pre-punching upper punch 31, the front chamfering upper punch 32, the fine punching upper punch 33, the reverse chamfering upper punch 34, and the front shaping upper punch 35 respectively;

[0030] like Figure 5As shown, the pre-punching upper punch 31 extends into the pre-punching lower die hole 411 of the pre-punching lower die 41 after the die is closed, and punches a through hole 501 on the material strip 50;

[0031] like Figure 6 As shown, the lower end of the front chamfering upper punch 32 is provided with a front chamfer 321, and the front chamfer 321 punches out the upper chamfer 502 on the inner wall of the through hole 501 after the mold is closed; the height of the portion of the front chamfering upper punch 32 with the upper chamfer 502 must be less than the thickness of the material strip 50 to avoid directly penetrating the through hole 501 and punching through the material strip 50. After this chamfering step, the upper chamfer 502 will be punched out at the upper part of the through hole 501, and a flange 504 will be formed at the lower part of the through hole 501 (i.e., the lower end of the upper chamfer 502). The structure of the front chamfering lower concave mold 42 can directly groove the lower concave mold plate 201;

[0032] like Figure 7 As shown, the fine punching upper punch 33 extends into the fine punching lower die hole 431 of the fine punching lower die 43 after the die is closed, and the fine punching upper punch 33 penetrates the through hole 501 and punches out the flange 504 on the inner wall of the through hole 501;

[0033] like Figure 8 As shown, the lower end of the reverse chamfering upper punch 34 is provided with an upper positioning chamfer 341 for cooperating with the upper chamfer 502 for positioning. The upper positioning chamfer 341 not only plays a positioning role, but also plays a role in limiting the size of the upper chamfer 502. The side of the reverse chamfering lower punch 44 is provided with a reverse chamfer 441, and the reverse chamfer 441 punches out a lower chamfer 503 on the inner wall of the through hole 501 after the mold is closed; after this chamfering step, a lower chamfer 503 will be punched out at the lower part of the through hole 501.

[0034] like Fig. 9 As shown, the side of the front shaping upper punch 35 is provided with an upper shaping chamfer 351, which is used to further shape the upper chamfer 502, and the upper end of the front shaping lower punch 45 is provided with a lower positioning chamfer 451 for cooperating with the positioning of the lower chamfer 503. The lower positioning chamfer 451 not only plays a positioning role, but also plays a role in limiting the size of the lower chamfer 503.

[0035] Preferably, in combination with the above scheme, in order to facilitate the processing design of the mold and the assembly of the various parts of the mold, the upper mold 10 includes an upper mold base 101, and an upper pad 102 and an upper fixed plate 103 which are sequentially stacked and fixed below the upper mold base 101, and the pre-punching upper punch 31, the front chamfering upper punch 32, the fine punching upper punch 33, and the front shaping upper punch 35 are all fixedly arranged in the upper fixed plate 103; the lower mold 20 includes a lower mold base 203, and a lower fixed plate 202 and a lower concave template 201 which are sequentially stacked and fixed above the lower mold base 203, and the pre-punching lower concave mold 41, the front chamfering lower concave mold 42, the fine punching lower concave mold 43, the reverse chamfering lower punch 44, and the front shaping lower punch 45 are all fixedly arranged in the lower concave template 201.

[0036] Preferably, in combination with the above scheme, in order to facilitate pushing away the material belt for unloading, an upper unloading structure is provided in the upper mold 10, and the upper unloading structure includes an upper unloading back plate 104 and an upper unloading plate 105 hung on the upper fixed plate 103, and the upper unloading back plate 104 is fixedly connected to the upper unloading plate 105, and the pre-punching upper punch 31, the front chamfering upper punch 32, the fine punching upper punch 33, and the front shaping upper punch 35 all pass through the upper unloading structure and are movably connected to the upper unloading structure, and the reverse chamfering upper punch 34 is fixedly arranged in the upper unloading plate 105.

[0037] Preferably, in combination with the above scheme, in order to facilitate providing unloading elastic force, an upper ejector rod 37 is movably provided in the upper mold 10, the upper end of the upper ejector rod 37 abuts against the upper spring 36, and the lower end of the upper ejector rod 37 abuts against the upper unloading back plate 104.

[0038] Preferably, in combination with the above solution, in order to facilitate the shaping and positioning of the through hole 501, a lower shaping boss 442 is provided at the upper end of the reverse chamfer 441, and the lower shaping boss 442 extends into the through hole 501 after the mold is closed.

[0039] Preferably, in combination with the above solution, in order to facilitate the shaping and positioning of the through hole 501, an upper shaping boss 352 is provided at the lower end of the upper shaping chamfer 351, and the upper shaping boss 352 extends into the through hole 501 after the mold is closed.

[0040] Preferably, in combination with the above solution, in order to facilitate the discharge of waste after punching, a first blanking hole 412 is provided in the lower die 20 below the pre-punching lower die hole 411 .

[0041] Preferably, in combination with the above solution, in order to facilitate the discharge of waste after fine punching, a second blanking hole 432 is provided in the lower die 20 below the fine punching lower die hole 431.

[0042] The working principle of this utility model:

[0043] like Figure 2 As shown in the structure of the material strip 50, this process flow is divided into 18 stations from g1 to g18. Among them: g1 is a punching and guiding hole station, which is used for precise positioning and feeding; g2 is a pre-punching station; g3 is a front chamfering station; g4 is an empty station; g5 is a fine punching station; g6 is an empty station; g7 is an empty station; g8 is a reverse chamfering station; g9 is a front shaping station; g10 is an empty station; g11 is an empty station; g12 is a pre-punching station, which is used to punch holes in other positions of the material strip; g13 is a fine punching station, which is used to fine punch holes in other positions of the material strip; g14 is a small hole punching station; g15 is a small hole deburring station; g16 is a punching station, which is used to punch holes in other positions of the material strip; g17 is a punching station, which is used to punch holes in other positions of the material strip; g18 is a cutting and discharging station. The structure of the utility model is mainly in the g2 pre-punching station, the g3 front chamfering station, the g5 fine punching station, the g8 reverse chamfering station, and the g9 front shaping station. The empty station design is mainly for arranging the inserts and increasing the strength of the mold.

[0044] In this embodiment, the moving direction of the material belt 50 is Figure 3 When the punch press drives the upper die 10 to move upward to the top, the feeder will have sent the material strip 50 to the top of the lower concave template 201. Under the action of the upper spring 36, the upper discharge structure (upper discharge back plate 104, upper discharge plate 105) in the upper die 10 first presses the material strip 50 with the upper discharge plate 105 until the material strip 50 contacts the lower concave template 201, and the upper ejector rod 37 presses the upper surface of the upper discharge back plate 104, so that the upper discharge plate 105 elastically acts on the upper surface of the material strip 50, providing the material strip pressing force to ensure that the material strip 50 does not move.

[0045] At this time, at the g2 station, after the mold is closed, the upper punch 31 extends into the pre-punching lower die hole 411 of the pre-punching lower die 41, and punches a through hole 501 on the material strip 50, until the mold is completely closed, the pre-punching is completed, and the waste falls from the first blanking hole 412;

[0046] At the same time, at the g3 station, the front chamfer 321 of the front chamfer upper punch 32 punches out the upper chamfer 502 on the inner wall of the through hole 501 of the pre-punched material strip after the mold is completely closed; and at the same time, a flange 504 is formed at the lower part of the through hole 501;

[0047] At the same time, at the g5 station, the fine punching upper punch 33 extends into the fine punching lower die 43 after the die is closed, and the fine punching upper punch 33 penetrates the through hole 501 and punches out the flange 504 on the inner wall of the through hole 501. After the front chamfering step, the fine punching is completed, and the waste material falls off from the waste material holes of the lower pad 402 and the lower die base 403;

[0048] At the same time, at the g8 station, the reverse chamfer 441 of the reverse chamfering lower punch 44 punches out the lower chamfer 503 on the inner wall of the through hole 501 after the mold is closed; after this chamfering step, the lower chamfer 503 will be punched out at the lower part of the through hole 501 that has completed the fine punching step, completing the reverse chamfering;

[0049] At the same time, at the g9 station, the upper shaping chamfer 351 of the front shaping upper punch 35 is further shaped on the upper chamfer 502 after the mold is closed.

[0050] After completing the above steps, the mold is opened, and the upper mold 10 moves up and down, first separated from the upper discharge structure by a discharge height (6mm), and the upper ejector 37 acts on the upper discharge structure and the material strip 50 with elastic force, ensuring that the material strip 50 does not change, while providing discharge force, and the upper discharge structure and the upper fixed plate 103 are separated, and the material strip 50 is completely removed from the pre-punching upper punch 31, the front chamfering upper punch 32, the fine punching upper punch 33, the reverse chamfering upper punch 34, and the front shaping upper punch 35. When the material strip 50 rises to the designed feeding height (10mm), the upper mold 10 continues to rise to the top of the stroke, and the mold is fully opened. Each time the mold is opened, the material strip 50 moves forward one station.

[0051] It should be noted that all directional indications in the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain posture shown in the drawings. If the specific posture changes, the directional indication will also change accordingly.

[0052] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or they are directly applied to other occasions without improvement, they all fall within the protection scope of the utility model.

Claims

1. A double-sided chamfering device, comprising an upper die (10) and a lower die (20), characterized in that: The upper die (10) is provided with a pre-punching upper punch (31), a front chamfering upper punch (32), a fine punching upper punch (33), a reverse chamfering upper punch (34), and a front shaping upper punch (35) in sequence; the lower die (20) is provided with a pre-punching lower die (41), a front chamfering lower die (42), a fine punching lower die (43), a reverse chamfering lower die (44), and a front shaping lower die (45) at positions corresponding to the pre-punching upper punch (31), the front chamfering upper punch (32), the fine punching upper punch (33), the reverse chamfering upper punch (34), and the front shaping upper punch (35) respectively; The pre-punching upper punch (31) extends into the pre-punching lower die hole (411) of the pre-punching lower die (41) after the die is closed, and punches a through hole (501) on the material strip (50); The lower end of the front chamfer upper punch (32) is provided with a front chamfer (321), and the front chamfer (321) punches out an upper chamfer (502) on the inner wall of the through hole (501) after the mold is closed; The fine punching upper punch (33) extends into the fine punching lower die hole (431) of the fine punching lower die (43) after the die is closed, and punches out the flange (504) on the inner wall of the through hole (501); The lower end of the reverse chamfer upper punch (34) is provided with an upper positioning chamfer (341) for cooperating with the upper chamfer (502) for positioning, and the side of the reverse chamfer lower punch (44) is provided with a reverse chamfer (441), and the reverse chamfer (441) punches out a lower chamfer (503) on the inner wall of the through hole (501) after the mold is closed; The side edge of the front shaping upper punch (35) is provided with an upper shaping chamfer (351), and the upper end of the front shaping lower punch (45) is provided with a lower positioning chamfer (451) for cooperating with the lower chamfer (503) for positioning.

2. The double-sided chamfering device according to claim 1, characterized in that: The upper die (10) comprises an upper die seat (101), and an upper pad (102) and an upper fixed plate (103) which are sequentially stacked and fixed below the upper die seat (101); the pre-punching upper punch (31), the front chamfering upper punch (32), the fine punching upper punch (33), and the front shaping upper punch (35) are all fixedly arranged in the upper fixed plate (103); the lower die (20) comprises a lower die seat (203), and a lower fixed plate (202) and a lower concave template (201) which are sequentially stacked and fixed above the lower die seat (203); the pre-punching lower concave template (41), the front chamfering lower concave template (42), the fine punching lower concave template (43), the reverse chamfering lower concave template (44), and the front shaping lower concave template (45) are all fixedly arranged in the lower concave template (201).

3. The double-sided chamfering device according to claim 2, characterized in that: An upper discharge structure is provided in the upper die (10), and the upper discharge structure includes an upper discharge back plate (104) and an upper discharge plate (105) hung on the upper fixed plate (103); the upper discharge back plate (104) is fixedly connected to the upper discharge plate (105); the pre-punching upper punch (31), the front chamfering upper punch (32), the fine punching upper punch (33), and the front shaping upper punch (35) all pass through the upper discharge structure and are movably connected to the upper discharge structure; the reverse chamfering upper punch (34) is fixedly provided in the upper discharge plate (105).

4. The double-sided chamfering device according to claim 3, characterized in that: An upper ejector rod (37) is movably arranged in the upper die (10), the upper end of the upper ejector rod (37) is in contact with an upper spring (36), and the lower end of the upper ejector rod (37) is in contact with an upper unloading back plate (104).

5. The double-sided chamfering device according to claim 1, characterized in that: A lower shaping boss (442) is provided at the upper end of the reverse chamfer (441), and the lower shaping boss (442) extends into the through hole (501) after the mold is closed.

6. The double-sided chamfering device according to claim 1, characterized in that: An upper shaping boss (352) is provided at the lower end of the upper shaping chamfer (351), and the upper shaping boss (352) extends into the through hole (501) after the mold is closed.

7. The double-sided chamfering device according to claim 1, characterized in that: A first blanking hole (412) is provided in the lower die (20) at a position below the pre-punching lower die hole (411).

8. The double-sided chamfering device according to claim 1, characterized in that: A second blanking hole (432) is provided in the lower die (20) at a position below the fine punching lower die hole (431).

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