Die flanging structure

Abstract

The utility model provides a die flanging structure which comprises an upper die and a lower die, an upper forming female die is fixedly arranged in the upper die, and the inner diameter of the upper forming female die is matched with the outer diameter of the side wall of a boss of a product blank; a piece pushing block is movably connected in the upper forming female die, an upper limiting boss is arranged at the lower end of the piece pushing block, and the outer diameter of the upper limiting boss is matched with the inner diameter of a boss hole of a product blank. A lower flanging male die is fixedly arranged at the position, corresponding to the upper forming female die, in the lower die, and the outer diameter of the lower flanging male die is matched with the inner diameter of the side wall of a boss of a product blank. A lower limiting boss is arranged at the position, corresponding to the upper limiting boss, of the upper end of the lower flanging male die, and the outer diameter of the lower limiting boss is matched with the inner diameter of a boss hole of a product blank. The hole flanging forming die solves the problem that an existing hole flanging forming die lacks a positioning structure for a round hole of a product, so that the machining precision of the round hole of the product is insufficient.

Description

Technical Field

[0001] The utility model relates to the technical field of progressive die processing, in particular to a die flanging structure. 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 sensor output rotor product shown has high requirements for processing progress. The existing progressive die flanging forming die lacks a stable positioning structure for the circular hole of the rotor blank, which causes the product to easily deflect during stamping, resulting in insufficient processing accuracy of the product's circular ring, and even stress cracking at the edge of the product's circular ring, affecting the production quality of the product. Therefore, it is necessary to invent a die flanging structure for a progressive die. Utility Model Content

[0003] The utility model aims to provide a die flanging structure which can be used in a progressive die to solve the problem that the existing flanging forming die lacks a positioning structure for the round hole of the product, resulting in insufficient processing accuracy of the round ring of the product.

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

[0005] A mold flanging structure comprises an upper mold and a lower mold, wherein an upper forming die is fixedly arranged in the upper mold, and the inner diameter of the upper forming die is adapted to the outer diameter of the boss side wall of the product blank;

[0006] A pusher block is movably connected in the upper forming die, and an upper limit boss is arranged at the lower end of the pusher block, and the outer diameter of the upper limit boss is adapted to the inner diameter of the boss hole of the product blank;

[0007] A lower flanging punch is fixedly arranged at a position in the lower die corresponding to the upper forming die, and the outer diameter of the lower flanging punch is adapted to the inner diameter of the boss side wall of the product blank;

[0008] A lower limit boss is arranged at the upper end of the lower flanging punch at a position corresponding to the upper limit boss, and the outer diameter of the lower limit boss is adapted to the inner diameter of the boss hole of the product blank.

[0009] Furthermore, the upper die includes an upper die seat, and an upper pad, an upper fixing plate, an upper unloading back plate, and an upper unloading plate which are sequentially stacked and fixed below the upper die seat, and the upper forming die is fixedly arranged in the upper unloading plate.

[0010] Furthermore, a first spring is arranged in the upper die, and the first spring abuts against the upper end of the pusher block.

[0011] Furthermore, the lower die includes a lower die base, and a lower pad and a lower fixing plate which are sequentially stacked and fixed on the lower die base.

[0012] Furthermore, a floating plate is movably connected above the lower fixed plate, and the lower flanging punch passes through the floating plate and is movably connected to the floating plate.

[0013] Furthermore, a second spring is provided in the lower die, and the second spring abuts against the lower end surface of the floating plate.

[0014] Furthermore, a limiting screw for limiting the floating height of the floating plate is arranged in the lower die, the limiting screw passes through the floating plate and is movably connected to the floating plate, and the limiting screw is fixedly connected to the lower fixed plate.

[0015] Furthermore, the upper edge of the lower limit boss is provided with a first R angle.

[0016] Furthermore, the edge of the lower flanging punch is provided with a second R angle.

[0017] The beneficial effects of the utility model: the utility model has a good matching positioning with the product during the hole-flanging forming, the height difference of the product after flanging is small, and it solves the problem of stress cracking at the edge during conventional hole-flanging forming. It plays an important role in ensuring the stable quality of the product, effectively reduces production costs, and improves production efficiency.

[0018] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the sensor output rotor product in the utility model.

[0020] Figure 2 This is a cross-sectional view of the sensor output rotor blank in the utility model.

[0021] Figure 3 It is a cross-sectional view of an open state of a mold flanging structure of the utility model.

[0022] Figure 4 It is a sectional view of a closed state of a mold flanging structure of the utility model.

[0023] Figure 5 It is a cross-sectional view of the push piece block in the utility model.

[0024] Figure 6 It is a cross-sectional view of the lower flanging punch of the utility model. DETAILED DESCRIPTION

[0025] like Figures 3 to 6 A mold flanging structure shown includes an upper mold 10 and a lower mold 20. An upper molding die 1 is fixedly disposed in the upper mold 10. The inner diameter of the upper molding die 1 is adapted to the outer diameter of the boss side wall 31 of the product blank 30.

[0026] A push block 2 is movably connected in the upper forming die 1, and an upper limit boss 21 is provided at the lower end of the push block 2. The outer diameter of the upper limit boss 21 is adapted to the inner diameter of the boss hole 32 of the product blank 30; the upper limit boss 21 is used to prevent the boss hole 32 of the product blank 30 from flanging interference.

[0027] A lower flanging punch 4 is fixedly arranged in the lower die 20 at a position corresponding to the upper forming die 1, and the outer diameter of the lower flanging punch 4 is adapted to the inner diameter of the boss side wall 31 of the product blank 30;

[0028] A lower limit boss 41 is provided at the upper end of the lower flanging punch 4 at a position corresponding to the upper limit boss 21 , and the outer diameter of the lower limit boss 41 matches the inner diameter of the boss hole 32 of the product blank 30 .

[0029] Preferably, in combination with the above scheme, the upper mold 10 includes an upper mold base 101, and an upper pad 102, an upper fixed plate 103, an upper unloading back plate 104, and an upper unloading plate 105 which are sequentially stacked and fixed under the upper mold base 101 by screwing, and the upper molding die 1 is fixedly arranged in the upper unloading plate 105.

[0030] Preferably, in combination with the above solution, in order to provide ejection elastic force to the pusher block 2 and facilitate unloading, a first spring 3 is provided in the upper die 10 , and the first spring 3 abuts against the upper end of the pusher block 2 .

[0031] Preferably, in combination with the above solution, the lower die 20 includes a lower die base 204, and a lower pad 203 and a lower fixing plate 202 which are sequentially stacked and fixed on the lower die base 204 by screw connection.

[0032] Preferably, in combination with the above solution, in order to facilitate unloading, a floating plate 201 is movably connected above the lower fixed plate 202 , and the lower flanging punch 4 passes through the floating plate 201 and is movably connected to the floating plate 201 .

[0033] Preferably, in combination with the above solution, in order to provide a force to lift the material strip and facilitate unloading, a second spring 5 is provided in the lower mold 20 , and the second spring 5 abuts against the lower end surface of the floating plate 201 .

[0034] Preferably, in combination with the above scheme, the lower mold 20 is provided with a limit screw 6 for limiting the floating height of the floating plate 201, the limit screw 6 passes through the floating plate 201 and is movably connected to the floating plate 201, and the limit screw 6 is fixedly connected to the lower fixed plate 202.

[0035] Preferably, in combination with the above solution, in order to play a stamping guide role and prevent hard stamping from causing damage to the product, the upper edge of the lower limit boss 41 is provided with a first R angle 42.

[0036] Preferably, in combination with the above solution, in order to play a stamping guide role and prevent hard stamping from causing damage to the product, the edge of the lower flanging punch 4 is provided with a second R angle 43.

[0037] The working principle of this utility model:

[0038] In order to make the product flanging, the blank must go through a punching process (the punching structure is a prior art and does not involve the flanging forming of the present invention, so it will not be elaborated). When the punch press drives the upper die 10 to move upward to the top, the feeder will send the supporting material belt of the product blank 30 to the top of the floating plate 201. At this time, the boss hole 32 at the upper end of the product blank 30 is aligned with the upper limit boss 21 and the lower limit boss 41;

[0039] The punch press then drives the upper die 10 downward to gradually close the die. When the upper unloading plate 105 contacts the material belt 300 and presses on the floating plate 201, the first R angle 42 initially contacts and cooperates with the boss hole 32. Then, the lower limit boss 41 of the lower flanging punch 4 passes through the boss hole 32 of the product blank 30 and cooperates with the boss hole 32 to be positioned.

[0040] The upper die 10 continues to move downward, and the lower limit boss 41 abuts against the upper limit boss 21 of the push block 2, forcing the push block 2 to move upward and retreat so as to avoid interference during flanging. At this time, the second R angle 43 gradually straightens the boss side wall 31 of the product blank 30 into a convex ring structure, and the outer cylindrical surface of the lower flanging punch 4 also enters the inside of the boss side wall 31 of the product blank 30; under the action of force, the lower flanging punch 4 presses the product into the upper forming die 1 for plastic deformation to form the shape of the product;

[0041] After the press passes the lower limit point, it moves upward, the mold opens, the upper mold 10 moves upward, the pusher block 2 pushes the product out of the upper forming die 1 by elastic force, and the floating plate 201 also lifts the material strip by elastic force, and the material strip moves to the next station for subsequent processing. At this point, the entire flanging process is completed.

[0042] 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.

[0043] 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 mold flanging structure, comprising an upper mold (10) and a lower mold (20), characterized in that: An upper forming die (1) is fixedly arranged in the upper die (10), and the inner diameter of the upper forming die (1) is adapted to the outer diameter of the boss side wall (31) of the product blank (30); A pusher block (2) is movably connected to the upper forming die (1), and an upper limit boss (21) is provided at the lower end of the pusher block (2), and the outer diameter of the upper limit boss (21) is adapted to the inner diameter of the boss hole (32) of the product blank (30); A lower flanging punch (4) is fixedly arranged at a position in the lower die (20) corresponding to the upper forming die (1), and the outer diameter of the lower flanging punch (4) is adapted to the inner diameter of the boss side wall (31) of the product blank (30); A lower limit boss (41) is provided at the upper end of the lower flanging punch (4) at a position corresponding to the upper limit boss (21), and the outer diameter of the lower limit boss (41) is adapted to the inner diameter of the boss hole (32) of the product blank (30).

2. The mold flanging structure according to claim 1 is characterized in that: The upper die (10) comprises an upper die base (101), and an upper pad (102), an upper fixing plate (103), an upper unloading back plate (104), and an upper unloading plate (105) which are sequentially stacked and fixed below the upper die base (101); the upper forming die (1) is fixedly arranged in the upper unloading plate (105).

3. The mold flanging structure according to claim 1 is characterized in that: The upper die (10) is provided with a first spring (3), and the first spring (3) abuts against the upper end of the pusher block (2).

4. The mold flanging structure according to claim 1 is characterized in that: The lower die (20) comprises a lower die base (204), and a lower pad (203) and a lower fixing plate (202) which are sequentially stacked and fixed on the lower die base (204).

5. The mold flanging structure according to claim 4 is characterized in that: A floating plate (201) is movably connected above the lower fixed plate (202), and the lower flanging punch (4) passes through the floating plate (201) and is movably connected to the floating plate (201).

6. The mold flanging structure according to claim 5, characterized in that: The lower die (20) is provided with a second spring (5), and the second spring (5) abuts against the lower end surface of the floating plate (201).

7. The mold flanging structure according to claim 6 is characterized in that: The lower mold (20) is provided with a limiting screw (6) for limiting the floating height of the floating plate (201); the limiting screw (6) passes through the floating plate (201) and is movably connected to the floating plate (201); and the limiting screw (6) is fixedly connected to the lower fixed plate (202).

8. The mold flanging structure according to claim 1, characterized in that: The upper edge of the lower limit boss (41) is provided with a first R angle (42).

9. The mold flanging structure according to claim 1, characterized in that: The edge of the lower flanging punch (4) is provided with a second R angle (43).

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