Workpiece feeding device for a transfer mold

Abstract

The utility model provides a kind of workpiece feeding device of progressive die, the feeding device is arranged between upper die and lower die, including main connecting rod, connecting block, electromagnet, limit block and buffer assembly, the bottom of upper die is provided with long strip installation slot, one end of main connecting rod and one end of installation slot are rotatably connected, electromagnet is fixedly arranged at the top of installation slot and away from the rotation center of main connecting rod;The top of connecting block and the free end of main connecting rod are rotatably connected, the bottom of connecting block is equipped with the sliding block movable along vertical direction;Connecting block is internally provided with the first spring for pushing the sliding block to move downwards.The utility model solves that workpiece is not completed when strip stamping raw material is processed again in progressive die and cannot continue to move forward, so that the structure that progressive die can process is more.

Description

Technical Field

[0001] This utility model relates to the field of progressive die equipment, and in particular to a workpiece feeding device for progressive dies. Background Technology

[0002] Progressive die refers to a cold stamping die in which a strip of raw material is used in one stamping stroke of a press, and multiple stamping processes are completed simultaneously on a die at several different stations. After each stamping stroke is completed, the strip moves a fixed distance once until the product is finished.

[0003] In existing technologies, feeding structures are typically set at both ends of a progressive die to ensure continuous feeding of the raw material. However, when the stamped product separates from the stamped raw material without moving the ejection end due to its shape or process, the feeding mechanisms at both ends cannot allow the workpiece to continue moving. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a workpiece feeding device for a continuous die, which solves the problem that in existing technologies, when the workpiece is not fully processed, the strip-shaped stamped raw material cannot continue to move forward in the continuous die.

[0005] According to an embodiment of this utility model, a workpiece feeding device for a progressive die is provided. The feeding device is disposed between an upper die and a lower die, and includes a main connecting rod, a connecting block, an electromagnet, a limiting block, and a buffer assembly. The bottom of the upper die is provided with an elongated mounting groove. One end of the main connecting rod is rotatably connected to one end of the mounting groove. The electromagnet is fixedly disposed at the top of the mounting groove and away from the rotation center of the main connecting rod. The top of the connecting block is rotatably connected to the free end of the main connecting rod. The bottom of the connecting block is provided with a sliding block that can move vertically. A first spring is provided inside the connecting block to push the sliding block downward. The limiting block is fixedly disposed on the side wall of the mounting groove and corresponds to the movement trajectory of the connecting block. The limiting block has a first inclined surface on its outer surface, and a matching second inclined surface is provided on one side of the connecting block. A third inclined surface is provided on the inner wall of the mounting groove to limit the downward rotation angle of the main connecting rod. The buffer assembly is used to reduce the impact force of the main connecting rod rotating downward and the third inclined surface. The rotation surface of the main connecting rod is parallel to the feeding direction of the progressive die.

[0006] The technical principle of this utility model is as follows: when the upper mold and the lower mold are closed, the hole in the sliding block inserted into the workpiece contacts the plane of the top surface of the lower mold. As the main connecting rod rotates, the connecting block moves laterally with the sliding block, thereby causing the workpiece to be continuously fed forward on the lower mold.

[0007] Preferably, one end of the main connecting rod is provided with a U-shaped groove, the connecting block is located in the U-shaped groove, and a rotating shaft is provided between the two sides of the connecting block and the inner wall of the U-shaped groove.

[0008] Preferably, the buffer assembly includes an abutment block, a second spring, a piston block, and a third spring. A primary buffer hole is horizontally arranged on the third inclined surface, a secondary buffer hole is arranged at the bottom of the primary buffer hole, and an exhaust hole is arranged at the bottom of the secondary buffer hole. One end of the abutment block is slidably disposed inside the primary buffer hole, and the piston block is disposed inside the secondary buffer hole. One end of the second spring is fixedly connected to one end of the abutment block, and the other end of the second spring is fixedly connected to the end face of the piston block. One end of the third spring is fixedly connected to the bottom of the secondary buffer hole, and the other end of the third spring is fixedly connected to the adjacent end face of the piston block.

[0009] Preferably, the end of the abutment block away from the primary buffer hole is provided with a rubber head; and the end center of the piston block is provided with a threaded hole.

[0010] Preferably, the main connecting rods are arranged on both sides of the bottom surface of the upper mold.

[0011] Preferably, two opposing positioning plates are fixedly installed in the middle of the mounting groove, and the distance between the two positioning plates is adapted to the width of the main connecting rod; the bottom of the positioning plates is chamfered.

[0012] Preferably, a sealing ring is provided on the outer wall of the piston block.

[0013] Compared to existing technologies, this invention has the following advantages: When the sliding block moves downwards and accurately enters the through hole on the workpiece, the upper and lower dies close, causing the main connecting rod to rotate. The rotating main connecting rod then drives the sliding block forward along the continuous die's direction to the next station. When the upper and lower dies contact, the connecting block and the limiting block contact, and the sliding block retracts into the connecting block, thus preventing the sliding block from moving the workpiece during the punching process. When the upper and lower dies separate, the electromagnet engages and holds the main connecting rod to prevent it from resetting the sliding block. When the upper die moves to the desired height, the electromagnet releases the connecting rod, and the main connecting rod rotates downwards, causing the sliding block to move to the position of the through hole on the workpiece at the previous station, and then the process repeats. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the upper and lower molds of this utility model during mold opening.

[0015] Figure 2 This is a schematic diagram of the upper and lower molds of this utility model when they are closed.

[0016] Figure 3This is a schematic diagram of the buffer component of this utility model.

[0017] In the above attached figures: 1. Main connecting rod; 2. Mounting groove; 3. Workpiece; 4. Sliding block; 5. Connecting block; 6. Abutting block; 7. Electromagnet; 8. Limiting block; 9. Upper mold; 10. Lower mold; 11. Positioning plate; 12. Third spring; 13. Vent hole; 14. Second spring; 15. Piston block. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 , 2 As shown in the figure, this utility model embodiment proposes a workpiece feeding device for a continuous die. The feeding device is disposed between the upper die 9 and the lower die 10, between two workstations. The device includes a main connecting rod 1, a connecting block 5, an electromagnet 7, a limiting block 8, and a buffer assembly. The bottom of the upper die 9 is provided with a long strip-shaped mounting groove 2. When the main connecting rod 1 is in a horizontal state, it can be completely inserted into the mounting groove 2. One end of the main connecting rod 1 is rotatably connected to one end of the mounting groove 2. The rotation axis of the main connecting rod 1 is horizontally set, so that the rotation surface of the main connecting rod 1 is a vertical plane. The electromagnet 7 is fixedly disposed at the top of the mounting groove 2 and away from the rotation center of the main connecting rod 1. The main connecting rod 1 is made of metal. The top of the connecting block 5 is rotatably connected to the free end of the main connecting rod 1. The bottom of the connecting block 5 is provided with a sliding block 4 that can move in the vertical direction. The area where the lower die 10 contacts the sliding block 4 is a smooth plane to reduce friction. The connecting block 5 is provided with a first spring for pushing the sliding block 4 downward. The limiting block 8 is fixedly mounted on the side wall of the mounting groove 2 and corresponds to the movement trajectory of the connecting block 5. The limiting block 8 has a first inclined surface on its outer surface, and the connecting block 5 has a matching second inclined surface on one side. The limiting block 8 makes the movement position of the sliding block 4 more precise when the upper mold 9 and the lower mold 10 are closed. The inner wall of the mounting groove 2 has a third inclined surface to limit the downward rotation angle of the main connecting rod 1. The third inclined surface prevents the main connecting rod 1 from rotating downward to a 90° dead angle position, which would cause the main connecting rod 1 to break when the upper mold 9 and the lower mold 10 close again. The buffer assembly is used to reduce the impact force of the main connecting rod 1 when it rotates downward and the third inclined surface. The rotation surface of the main connecting rod 1 is parallel to the feed direction of the continuous mold. After the stamping is completed, the electromagnet 7 attracts the main connecting rod 1, so that the main connecting rod 1 does not rotate downward when the upper mold 9 moves upward. After moving to a certain height, the restriction on the main connecting rod 1 is released. The movement distance of the sliding block 4 is determined by the rotation angle and length of the main connecting rod 1. The rotation of the main connecting rod can move the workpiece by a full station distance, rather than just a partial distance. The through hole that matches the sliding block 4 is a pre-designed structure for the workpiece during the stamping process.

[0020] Preferably, one end of the main connecting rod 1 is provided with a U-shaped groove, and the connecting block 5 is located within the U-shaped groove. A pivot is provided between the two sides of the connecting block 5 and the inner wall of the U-shaped groove. When the upper mold 9 and lower mold 10 close, the sliding block 4 at the end of the main connecting rod 1 slides relative to the top surface of the lower mold 10, causing relative rotation between the main connecting rod 1 and the connecting block 5. The rotation of the connecting block 5 within the U-shaped groove ensures a stable connection.

[0021] like Figure 3 As shown, preferably, the buffer assembly includes an abutment block 6, a second spring 14, a piston block 15, and a third spring 12. A primary buffer hole is horizontally arranged on the third inclined surface, and a secondary buffer hole is arranged at the bottom of the primary buffer hole. An exhaust hole 13 is arranged at the bottom of the secondary buffer hole. One end of the abutment block 6 is slidably disposed inside the primary buffer hole, and the piston block 15 is disposed inside the secondary buffer hole. One end of the second spring 14 is fixedly connected to one end of the abutment block 6, and the other end of the second spring 14 is fixedly connected to the end face of the piston block 15. One end of the third spring 12 is fixedly connected to the bottom of the secondary buffer hole, and the other end of the third spring 12 is fixedly connected to the adjacent end face of the piston block 15. When the electromagnet 7 is released from its restraint, the main connecting rod 1 rotates rapidly downwards. The main connecting rod 1 first contacts the abutment block 6, which then slides into the secondary buffer hole. The second spring 14 provides initial cushioning, preventing the main connecting rod 1 from contacting the third inclined surface immediately. Then, under the influence of gravity, the main connecting rod 1 pushes the abutment block 6 and piston block 15 to contract. The piston block 15 expels the gas from the secondary buffer hole, causing the main connecting rod 1 to fit against the third inclined surface. The third inclined surface also serves a positioning function, ensuring that when the main connecting rod 1 rotates downwards to a fixed angle, the sliding block 4 will be positioned accordingly.

[0022] Preferably, the end of the abutment block 6 furthest from the primary buffer hole is provided with a rubber head. A threaded hole is provided at the center of the end of the piston block 15. The rubber head prevents rigid contact, while the threaded hole facilitates the removal of the piston block 15 for maintenance and upkeep.

[0023] Preferably, the main connecting rods 1 are located on both sides of the bottom surface of the upper mold 9, allowing the workpiece 3 to be pushed forward simultaneously from both sides. The dual-sided pushing force ensures that the workpiece moves as a whole, rather than just moving a single point.

[0024] Preferably, two opposing positioning plates 11 are fixedly disposed in the middle of the mounting groove 2, and the distance between the two positioning plates 11 is adapted to the width of the main connecting rod 1; the bottom of the positioning plates 11 is chamfered. The positioning plates 11 are used to ensure that the main connecting rod 1 will not shift after frequent and long-term rotation.

[0025] Preferably, a sealing ring is provided on the outer wall of the piston block 15, and the gas in the secondary buffer hole is slowly released through the exhaust hole 13 to form a buffering effect, while the sealing ring prevents air leakage.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A workpiece feeding device for a progressive die, the feeding device being disposed between an upper die (9) and a lower die (10), characterized in that: The system includes a main connecting rod (1), a connecting block (5), an electromagnet (7), a limiting block (8), and a buffer assembly. The bottom of the upper mold (9) is provided with a long, narrow mounting groove (2). One end of the main connecting rod (1) is rotatably connected to one end of the mounting groove (2). The electromagnet (7) is fixedly mounted on the top of the mounting groove (2) and away from the rotation center of the main connecting rod (1). The top of the connecting block (5) is rotatably connected to the free end of the main connecting rod (1). The bottom of the connecting block (5) is provided with a sliding block (4) that can move vertically. The connecting block (5) has a mechanism for... A first spring pushes the sliding block (4) downward; the limiting block (8) is fixedly set on the side wall of the mounting groove (2) and corresponds to the movement trajectory of the connecting block (5); the limiting block (8) has a first inclined surface on its outer surface, and the connecting block (5) has a matching second inclined surface on one side; the inner wall of the mounting groove (2) has a third inclined surface to limit the downward rotation angle of the main connecting rod (1); the buffer assembly is used to reduce the impact force of the main connecting rod (1) and the third inclined surface when it rotates downward; the rotation surface of the main connecting rod (1) is parallel to the feed direction of the continuous mold.

2. The workpiece feeding device for a progressive die as described in claim 1, characterized in that: One end of the main connecting rod (1) is provided with a U-shaped groove, the connecting block (5) is located in the U-shaped groove, and a rotating shaft is provided between the two sides of the connecting block (5) and the inner wall of the U-shaped groove.

3. The workpiece feeding device for a progressive die as described in claim 1, characterized in that: The buffer assembly includes an abutment block (6), a second spring (14), a piston block (15), and a third spring (12). A primary buffer hole is horizontally arranged on the third inclined surface. A secondary buffer hole is arranged at the bottom of the primary buffer hole. An exhaust hole (13) is arranged at the bottom of the secondary buffer hole. One end of the abutment block (6) is slidably disposed inside the primary buffer hole. The piston block (15) is disposed inside the secondary buffer hole. One end of the second spring (14) is fixedly connected to one end of the abutment block (6), and the other end of the second spring (14) is fixedly connected to the end face of the piston block (15). One end of the third spring (12) is fixedly connected to the bottom of the secondary buffer hole, and the other end of the third spring (12) is fixedly connected to the adjacent end face of the piston block (15).

4. The workpiece feeding device for a progressive die as described in claim 3, characterized in that: The abutment block (6) has a rubber head at one end away from the primary buffer hole; the piston block (15) has a threaded hole at the center of its end.

5. The workpiece feeding device for a progressive die as described in claim 1, characterized in that: The main connecting rod (1) is located on both sides of the bottom surface of the upper mold (9).

6. The workpiece feeding device for a progressive die as described in claim 1, characterized in that: Two opposing positioning plates (11) are fixedly installed in the middle of the mounting groove (2), and the distance between the two positioning plates (11) is adapted to the width of the main connecting rod (1); the bottom of the positioning plate (11) is chamfered.

7. The workpiece feeding device for a progressive die as described in claim 4, characterized in that: A sealing ring is provided on the outer wall of the piston block (15).

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