Self-adaptive punch forming all-in-one machine

Abstract

The invention discloses a self-adaptive punch forming all-in-one machine which comprises an upper die (1) and a lower die (2), a mounting plate (3) extending towards one side of the lower die (2) is arranged on the upper die (1), and a horizontally-arranged forming inner cylinder (4) is arranged on the mounting plate (3); a lower semicircular outer forming groove (5) is formed in the lower die (2), side sliding blocks (6) which are elastically and movably connected are arranged on the two sides of the lower semicircular outer forming groove (5), a forming gap (7) matched with the forming inner cylinder (4) is formed between the side sliding blocks (6), forming side grooves (8) facing the lower semicircular outer forming groove (5) are formed in the inner ends of the side sliding blocks (6), and after the side sliding blocks (6) are oppositely attached, the two forming side grooves (8) form an upper semicircular outer forming groove (9). According to the bending device, step-by-step bending with high fitting degree can be automatically carried out on a plate, meanwhile, the bending supporting point is adjusted in a self-adaptive mode according to the bending process, the stress reliability is ensured, and then the structural stability of parts is improved.

Description

Technical Field

[0001] This invention relates to the field of stamping dies, and more particularly to an adaptive stamping forming integrated machine. Background Technology

[0002] Stamping dies are special process equipment used in cold stamping to process materials (metal or non-metal) into parts (or semi-finished products). They are commonly known as cold stamping dies. Stamping dies mainly consist of an upper die, a lower die, and standard fasteners. The upper die moves to apply pressure to the material at room temperature, causing it to separate or undergo plastic deformation, thereby obtaining the desired part. The bending process of cylindrical parts involves positioning a circular blank, then the upper die drives the punch downwards, pressing the blank into the cavity. The blank extends radially and contracts circumferentially, gradually conforming to the punch to form a hollow cylinder. Finally, it is reset and unloaded. This forming process requires pre-cutting of the blank, which is relatively complicated. In addition, because it is extruded from a circular blank as a whole, the instantaneous deformation is large, which can easily lead to uneven internal stress at both ends, resulting in poor structural reliability of the formed part. Summary of the Invention

[0003] The purpose of this invention is to provide an adaptive stamping forming integrated machine. This invention can automatically perform step-by-step bending of sheet metal with high fit, and adaptively adjust the bending support points according to the bending process to ensure stress reliability, thereby improving the structural stability of the parts.

[0004] The technical solution of this invention: An adaptive stamping forming integrated machine includes an upper die and a lower die. The upper die is provided with a mounting plate extending to one side of the lower die, and a horizontally arranged forming inner cylinder is provided on the mounting plate. The lower die is provided with a lower semi-circular outer forming groove, and side sliders are provided on both sides of the lower semi-circular outer forming groove, which are elastically connected. The side sliders have a forming gap corresponding to the forming inner cylinder. The inner end of the side slider is provided with a forming side groove facing the lower semi-circular outer forming groove. After the side sliders are aligned and fitted together, the two forming side grooves form an upper semi-circular outer forming groove. The upper semi-circular outer forming groove and the lower semi-circular outer forming groove surround each other to form an outer forming groove that fits with the forming inner cylinder. The side slider is provided with an outwardly facing inwardly pushing slope, and the upper die is provided with an extrusion slope adapted to the inwardly pushing slope. The forming inner cylinder is provided with a mounting hole arranged along the axis, and a rotating clamping mechanism is provided on the mounting hole.

[0005] In the aforementioned adaptive stamping forming integrated machine, the rotating clamping mechanism includes an adapter block that is axially elastically movably connected to the mounting hole. A rotating hole is provided on the forming inner cylinder, and the rotating hole is arranged parallel to the axis of the forming inner cylinder. A rotating sleeve is rotatably connected within the rotating hole, and a rotating rod is movably connected within the rotating sleeve. The end of the rotating rod is rotatably connected to the adapter block. Extended rods are provided on the sides of both the end of the rotating rod and the end of the rotating sleeve. Clamping pieces are provided at the ends of the extended rods, and clamping gaps exist between the clamping pieces and the outer wall of the forming inner cylinder. Spiral grooves are provided on the sides of both the rotating rod and the rotating sleeve, and guide blocks that fit into the corresponding spiral grooves are provided within the rotating hole. An acting inclined block is provided on the lower die, the inclined surface of which corresponds to the adapter block, and a reset port corresponding to the upper semi-circular outer forming groove is provided at the bottom of the acting inclined block.

[0006] In the aforementioned adaptive stamping forming integrated machine, the rotating hole is located on the axis of the forming inner cylinder.

[0007] In the aforementioned adaptive stamping forming integrated machine, the end of the spiral groove is provided with a straight positioning groove parallel to the axis of the forming inner cylinder.

[0008] In the aforementioned adaptive stamping forming integrated machine, the spiral directions of the two spiral grooves are opposite.

[0009] In the aforementioned adaptive stamping forming integrated machine, both sides of the lower die are provided with upright plates, and the upright plates are provided with symmetrically arranged horizontal guide holes. Guide rods are movably connected in the horizontal guide holes; one end of the guide rod is connected to the side slider, and the other end of the guide rod is provided with a return spring connected to the upright plate.

[0010] In the aforementioned adaptive stamping forming integrated machine, the inner push inclined surface is located between the guide rods.

[0011] In the aforementioned adaptive stamping forming integrated machine, the upper die is provided with a vertically arranged mounting port, and a vertically elastically connected mounting block is provided in the mounting port, with the mounting plate disposed at the bottom of the mounting block.

[0012] In the aforementioned adaptive stamping forming integrated machine, a plate placement groove is provided on the top surface of the side slider.

[0013] Compared with existing technologies, this method involves placing a flat sheet material on two side sliders, aligning the center of the sheet material with the inner cylinder of the upper mold. The upper mold is then driven downwards, causing the lower arc surface of the inner cylinder to first contact the center of the flat sheet material. Using the side sliders as support points, the center of the flat sheet material is pressed into the forming gap, forming a bend that fits the arc surface of the inner cylinder. Simultaneously, the rotating clamping mechanism of the adapter block clamps the formed arc surface. As the upper mold continues to move downwards, the inner cylinder passes through the forming gap, and the pressure slope contacts the inner pushing slope of the side sliders. The side sliders move towards the forming gap, and their ends press against the straight portion of the bent and folded flat sheet material, continuing to conform to the two arc surfaces of the inner cylinder, forming a curved surface. Simultaneously, the rotating clamping mechanism... The mechanism adjusts the clamping position to counteract the offset caused by lateral pressure; finally, the inner cylinder is formed close to the lower semicircle outer forming groove, and the two side sliders fit together, the forming gap disappears, and the rotating clamping mechanism of the adapter block disengages during the process. The two forming side grooves come together to form a semicircle outer forming groove and press the straight part of the remaining inwardly folded flat plate into place, forming a curved surface on the top arc surface of the inner cylinder. At this point, the upper and lower semicircle outer forming grooves are enclosed to form an outer forming groove that fits the inner cylinder, thus realizing the forming of the hollow cylinder. This invention features step-by-step extrusion bending with high fit, ensuring the accuracy and reliability of the deformation process. At the same time, it adaptively adjusts the bending support point according to the bending process to ensure the reliability of the force and further improve the structural stability of the part. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the side structure of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the present invention; Figure 4 This is a schematic diagram of the structure after removing the inner cylindrical part of the molded part of the present invention.

[0015] The markings in the attached diagram are as follows: 1. Upper mold; 2. Lower mold; 3. Mounting plate; 4. Forming inner cylinder; 5. Lower semi-circular outer forming groove; 6. Side slider; 7. Forming gap; 8. Forming side groove; 9. Upper semi-circular outer forming groove; 10. Outer forming groove; 11. Inner push slope; 12. Extrusion slope; 13. Mounting hole; 14. Rotating clamping mechanism; 15. Adaptor block; 16. Rotating hole; 17. Rotating sleeve; 18. Rotating rod; 19. Extension rod; 20. Clamping piece; 22. Spiral groove; 23. Guide block; 24. Acting inclined block; 25. Reset port; 26. Linear positioning groove; 27. Vertical plate; 28. Horizontal guide hole; 29. ​​Guide rod; 30. Reset spring; 31. Mounting port; 32. Mounting block; 33. Plate placement groove. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0017] Example: An adaptive stamping forming integrated machine, as shown in the attached figure. Figure 1 As shown, it includes an upper mold 1 and a lower mold 2. The lower mold is fixed to the press worktable and locked with bolts. The upper mold is fixed to the press slide and moves vertically. An installation plate 3 extending to the lower mold 2 is mounted on the upper mold 1. A horizontally formed inner cylinder 4 is integrally formed on the installation plate 3. (See attached diagram.) Figure 2 As shown, the lower mold 2 has a lower semi-circular outer forming groove 5. Side sliders 6 are elastically connected to both sides of the lower semi-circular outer forming groove 5. A forming gap 7 with a width corresponding to the forming inner cylinder 4 is formed between the side sliders 6. A quarter-circular forming side groove 8 facing the lower semi-circular outer forming groove 5 is formed at the inner end of each side slider 6. After the side sliders 6 are aligned and fitted together, the two forming side grooves 8 form an upper semi-circular outer forming groove 9. The upper semi-circular outer forming groove 9 and the lower semi-circular outer forming groove 5 enclose each other to form an outer forming groove 10 that fits with the forming inner cylinder 4. An inwardly pushing inclined surface 11 facing outwards is machined on the side sliders 6. An extrusion inclined surface 12 adapted to the inwardly pushing inclined surface 11 is machined on the upper mold 1. The extrusion inclined surface pushes the two side sliders to move laterally in opposite directions via the inwardly pushing inclined surface. An mounting hole 13 is formed in the forming inner cylinder 4 along its axis. A rotating clamping mechanism 14 is mounted on the mounting hole 13. (See attached...) Figure 3 and attached Figure 4As shown, the rotating clamping mechanism 14 includes an adapter block 15 that is axially elastically connected to the mounting hole 13. A rotating hole 16 is formed on the inner cylinder 4, and the rotating hole 16 is arranged parallel to the axis of the inner cylinder 4. A rotating sleeve 17 is rotatably connected inside the rotating hole 16, and a rotating rod 18 is movably connected inside the rotating sleeve 17. The end of the rotating rod 18 is rotatably connected to the adapter block 15. An extension rod 19 is integrally formed on the side of both the end of the rotating rod 18 and the end of the rotating sleeve 17. A clamping piece 20 is integrally formed on the end of the extension rod 19. The two clamping pieces are staggered, and there is a clamping gap between the clamping piece 20 and the outer wall of the inner cylinder 4. The inner surface of the clamping piece 20 is an arc-shaped structure concentric with the arc surface of the inner cylinder 4, ensuring the clamping... The clamping mechanism fits tightly against the surface of the sheet material, with a clamping gap used to clamp the sheet material wall and provide external positioning and fixation. Both the rotating rod 18 and the rotating sleeve 17 have spiral grooves 22 machined on their sides, and a guide block 23 corresponding to the spiral groove 22 is fixed inside the rotating hole 16. An actuating inclined block 24 is installed on the lower mold 2, with its inclined surface corresponding to the adapter block 15. The bottom of the actuating inclined block 24 has a reset port 25 corresponding to the upper semi-circular outer forming groove 9. When the upper mold moves down and contacts the flat sheet material, the actuating inclined block synchronously pushes the adapter block inward. The spiral directions of the two spiral grooves 22 are opposite. The inward movement of the adapter block moves the clamping piece from its initial position to the bending point of the sheet material (i.e., directly below the forming inner cylinder), thereby supporting and fixing the bottom of the sheet material through the clamping gap. To prevent sheet metal vibration due to lack of bottom support during the formation of the side arc surface, as the upper mold continues to move downward, the adapter block continues to be pushed by the inclined block. At this time, the rotating sleeve and rotating rod rotate through the cooperation of the spiral groove and the guide block, and the position of the clamping piece rotates outward. It maintains the fixation of the sheet metal at the curved part from the lower side of the forming inner cylinder, preventing sheet metal vibration due to lack of lateral and bottom support during the formation of the side arc surface. When the forming inner cylinder reaches the lower limit position, the adapter block corresponds to the reset port, and its elasticity allows it to quickly rebound and move outward, thereby driving the clamping piece to reset, avoiding interference with the sheet metal during the final extrusion stage. The rotating hole 16 is set on the axis of the forming inner cylinder 4 to ensure that the two clamping pieces rotate around the center of the forming inner cylinder. This ensures that the width of the clamping gap remains stable. The end of the spiral groove 22 is machined with a straight positioning groove 26 parallel to the axis of the inner cylinder 4. During the push-in stage of the adapter block, the straight positioning groove is engaged with the guide block. At this time, the rotating sleeve and the rotating rod do not rotate and are only used for clamping in the initial position. The two sides of the lower mold 2 are integrally formed with upright plates 27. The upright plates 27 have symmetrically arranged horizontal guide holes 28. A guide rod 29 is movably connected in the horizontal guide holes 28. One end of the guide rod 29 is connected to the side slider 6, and the other end of the guide rod 29 is equipped with a return spring 30 connected to the upright plate 27. The horizontal guide rod ensures that the side slider moves smoothly. At the same time, the initial position of the side slider is in contact with the upright plate, and it can only move inward and will not be squeezed and move outward.The initial state of the reset spring 30 is its natural extension, maintaining the initial distance between the side sliders 6; the inner push slope 11 is located between the guide rods 29, ensuring the stability of the force; the upper mold 1 has a vertically set mounting opening 31, and a mounting block 32 is fitted inside the mounting opening 31, which is vertically elastically connected by a spring; the mounting plate 3 is set at the bottom of the mounting block 32, and when the inner cylinder reaches its lower limit position, the mounting block can still move upward for transition, ensuring the full performance of the extrusion and bonding step; the lower mold has a transition groove corresponding to the position of the upper mold extrusion slope, which allows the upper mold extrusion slope to be embedded to ensure that the outer forming groove of the upper semicircle is fully close to the inner cylinder; the top surface of the side slider 6 has a plate placement groove 33 for placing and positioning the plate for stability.

[0018] Working principle: The flat plate is placed in the plate placement groove 33 of the side slider 6, so that its center is aligned with the forming inner cylinder 4. The upper mold 1 is driven to move downward with the driving slider of the press. The lower arc surface of the forming inner cylinder 4 first contacts the center of the plate and presses it into the forming gap 7. With the side slider 6 as the support base, the center of the plate forms an arc surface that fits into the forming inner cylinder 4. At the same time, the inclined block 24 of the lower mold 2 pushes the adapter block 15 to move inward along the mounting hole 13, which drives the rotating rod 18 and the rotating sleeve 17 to rotate through the cooperation of the spiral groove 22 and the guide block 23 (the spiral directions of the two spiral grooves 22 are opposite). The clamping piece 20 at the end of the extension rod 19 clamps and fixes the formed arc surface through the clamping gap. The straight positioning groove 26 at the end of the spiral groove 22 engages with the guide block 23 in the initial clamping stage to ensure stable positioning. The upper mold 1 continues to move downward, and the forming inner cylinder 4 passes through the forming gap 7. The extrusion inclined surface 12 of the upper mold 1 and the inward pushing inclined surface 11 of the side slider 6 are in contact. The side slider 6 is pushed along the guide rod 29 to move towards the forming gap 7. The horizontal guide hole 28 of the vertical plate 27 ensures that the guide rod 29 slides smoothly. The forming side groove 8 of the side slider 6 squeezes the straight part of the plate to make it fit into the arc surfaces on both sides of the inner cylinder 4. The clamping mechanism 14 is rotated to adjust the clamping position to counteract lateral displacement. When the inner cylinder 4 is close to the lower semicircular outer forming groove 5 of the lower mold 2, the two side sliders 6 are completely fitted together, making the forming gap 7 disappear. The two forming side grooves 8 form the upper semicircular outer forming groove 9 and surround the lower semicircular outer forming groove 5 to form the outer forming groove 10. The remaining straight part of the plate is pressed to fit into the top arc surface of the inner cylinder 4. At this time, the adapter block 15 corresponds to the reset port 25 of the inclined block 24 and elastically rebounds and moves outward, driving the clamping piece 20 to reset and detach from the plate. The mounting block 32 of the upper mold 1 moves elastically along the mounting port 31 to ensure sufficient compression. Finally, the upper mold 1 moves upward, and the reset spring 30 pulls the side slider 6 to reset, completing the hollow cylinder forming.

[0019] The above embodiments merely illustrate implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. Furthermore, in these embodiments, "up," "down," "left," "right," "front," and "back" represent relative positions only, not absolute positions. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An adaptive stamping forming integrated machine, characterized in that: The upper mold (1) and the lower mold (2) are included. The upper mold (1) is provided with a mounting plate (3) extending to one side of the lower mold (2). The mounting plate (3) is provided with a horizontally arranged forming inner cylinder (4). The lower mold (2) is provided with a lower semi-circular outer forming groove (5). The two sides of the lower semi-circular outer forming groove (5) are provided with elastically movable side sliders (6). The side sliders (6) have a forming gap (7) corresponding to the forming inner cylinder (4). The inner end of the side sliders (6) is provided with a forming side groove (8) facing the lower semi-circular outer forming groove (5). 6) After the two forming side grooves (8) are aligned, they form an upper semi-circular outer forming groove (9). The upper semi-circular outer forming groove (9) and the lower semi-circular outer forming groove (5) surround each other to form an outer forming groove (10) that fits with the forming inner cylinder (4). The side slider (6) is provided with an inward pushing slope (11) facing outward. The upper mold (1) is provided with an extrusion slope (12) that matches the inward pushing slope (11). The forming inner cylinder (4) is provided with an installation hole (13) arranged along the axis. The installation hole (13) is provided with a rotating clamping mechanism (14).

2. The adaptive stamping forming integrated machine according to claim 1, characterized in that: The rotating clamping mechanism (14) includes an adapter block (15) that is axially elastically connected to the mounting hole (13). A rotating hole (16) is provided on the formed inner cylinder (4), and the rotating hole (16) is arranged parallel to the axis of the formed inner cylinder (4). A rotating sleeve (17) is provided in the rotating hole (16) and is rotatably connected in the rotating sleeve (17). A rotating rod (18) is provided in the rotating sleeve (17) and is rotatably connected to the end of the rotating rod (18). An extension rod (19) is provided on the side of both the end of the rotating rod (18) and the end of the rotating sleeve (17). The end of the extension rod (19) is provided with a clamping piece (20), and there is a clamping gap between the clamping piece (20) and the outer wall of the forming inner cylinder (4); the side of the rotating rod (18) and the rotating sleeve (17) are provided with a spiral groove (22), and the rotating hole (16) is provided with a guide block (23) that matches the corresponding spiral groove (22); the lower mold (2) is provided with an action inclined block (24), the inclined surface of the action inclined block (24) corresponds to the adapter block (15), and the bottom of the action inclined block (24) is provided with a reset port (25) that corresponds to the upper semi-circular outer forming groove (9).

3. The adaptive stamping forming integrated machine according to claim 2, characterized in that: The rotating hole (16) is located on the axis of the formed inner cylinder (4).

4. The adaptive stamping forming integrated machine according to claim 2, characterized in that: The end of the spiral groove (22) is provided with a straight positioning groove (26) parallel to the axis of the inner cylinder (4).

5. The adaptive stamping forming integrated machine according to claim 2, characterized in that: The two spiral grooves (22) have opposite spiral directions.

6. The adaptive stamping forming integrated machine according to claim 1, characterized in that: Both sides of the lower mold (2) are provided with upright plates (27), and the upright plates (27) are provided with symmetrically arranged horizontal guide holes (28). The horizontal guide holes (28) are provided with guide rods (29) that are movably connected. One end of the guide rod (29) is connected to the side slider (6), and the other end of the guide rod (29) is provided with a return spring (30) connected to the upright plate (27).

7. The adaptive stamping forming integrated machine according to claim 5, characterized in that: The inward inclined surface (11) is located between the guide rods (29).

8. The adaptive stamping forming integrated machine according to claim 1, characterized in that: The upper mold (1) is provided with a vertically arranged mounting port (31), and a vertically elastically connected mounting block (32) is provided inside the mounting port (31). The mounting plate (3) is located at the bottom of the mounting block (32).

9. The adaptive stamping forming integrated machine according to claim 1, characterized in that: The top surface of the side slider (6) is provided with a plate placement groove (33).

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