Bending die for reed machining

Abstract

The invention belongs to the technical field of progressive dies, in particular to a bending die for reed processing, and provides the following scheme that the bending die comprises a machine base, an upper die mechanism and a lower die mechanism, the upper die mechanism is detachably mounted at the top of the machine base, the lower die mechanism is detachably mounted at the bottom of the machine base, and the upper die mechanism corresponds to the lower die mechanism in position; the lower die mechanism comprises two lower die bases and an extrusion assembly, the two lower die bases are fixed to the two sides of the top of the extrusion assembly, and the extrusion assembly is used for driving the two lower die bases to be close to or away from each other; after the upper die mechanism completes primary bending on the reed, the two lower die bases are driven to move through the extrusion assembly, and therefore the reed is bent again through the two lower die bases. According to the invention, the influence on the bending of the reed caused by the falling of the reed due to the increase of the pressing amplitude can be prevented, and meanwhile, the damage to the reed due to the large one-time bending amplitude can be avoided.

Description

A bending die for processing reeds Technical Field

[0001] This invention relates to the field of progressive dies, and more particularly to a bending die for processing reeds. Background Technology

[0002] Progressive dies consist of multiple stations, each sequentially linked to complete different processes. A series of different stamping processes are completed in one stroke of the punch press. After one stroke is completed, the punch press feeder moves the material forward at a fixed step distance. In this way, multiple processes can be completed on one die, such as punching, blanking, bending, trimming, stretching, etc. When processing spring sheets, progressive dies are used to bend the spring sheets.

[0003] A search revealed Chinese patent application CN210138988U, which discloses a forming stamping die, including an upper die base and a lower die base. A fixing plate is fixed below the upper die base, and a forming punch is vertically fixed through the center of the fixing plate. Guide posts are fixed to the bottom of the fixing plate around the forming punch. A concave die plate is fixed on the lower die base, and a concave die forming insert is fixed at the center of the concave die plate corresponding to the position of the forming punch. A positioning forming block is fixed on the concave die forming insert, and holes are present on the concave die plate corresponding to the positions of the guide posts. The bottom surface of the forming punch is sloped. The sidewalls of the positioning forming block slope inwards from top to bottom. This invention prevents cracking at the 90-degree U-shaped bend of the 277 support spring. Using a stamping die for forming improves the production efficiency and dimensional consistency of the 277 support spring, effectively enhances the safety of die use, improves the forming of stamped parts, and extends the service life of the parts.

[0004] In existing devices, when bending a spring, the spring is usually placed on a lower die and bent by pressing it with an upper die. However, the bending process requires a large amount of pressure. Therefore, bending the spring by pressing can cause it to fall off as the pressure increases, thus affecting the bending process. Summary of the Invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bending die for processing spring sheets, comprising a base, an upper die mechanism, and a lower die mechanism. The upper die mechanism is detachably mounted on the top of the base, and the lower die mechanism is detachably mounted on the bottom of the base, with the upper and lower die mechanisms corresponding to each other. The lower die mechanism includes two lower die seats and an extrusion assembly. The two lower die seats are fixed on both sides of the top of the extrusion assembly, and the extrusion assembly is used to drive the two lower die seats to move closer or further apart. After the upper die mechanism completes the initial bending of the spring sheet, the extrusion assembly drives the two lower die seats to move, thereby performing a second bending process on the spring sheet through the two lower die seats.

[0006] Preferably, the extrusion assembly includes a support plate, a connecting seat, a motor, a double-ended screw, and two support blocks. The support plate is fixed to the machine base, and the connecting seat is fixed to the top of the support plate. Slots are provided on both sides of the top of the connecting seat. The double-ended screw is rotatably connected to one of the slots. The motor is installed on one side of the connecting seat, and its output end is fixedly connected to one end of the double-ended screw. The two support blocks are symmetrically slidably connected to the two slots. The two support blocks are threaded to both sides of the double-ended screw, and the thread directions on both sides of the double-ended screw are opposite. The two lower die holders are respectively fixed to the two support blocks.

[0007] Preferably, the width of the support block is adapted to the width of the slot.

[0008] Preferably, the upper mold mechanism includes a hydraulic cylinder, an upper template, a support base, and an upper mold head. The hydraulic cylinder is fixed on the machine base, and its output end is fixedly connected to the upper template. The support base is fixed to the bottom of the upper template, and the upper mold head is detachably installed at the bottom of the support base.

[0009] Preferably, the top of the lower mold base is provided with a slot for placing the spring sheet, and a fixing mechanism is provided on one side of the slot. The fixing mechanism is used to fix the spring sheet when the lower mold mechanism presses the spring sheet.

[0010] Preferably, the fixing mechanism includes a support plate, a fixing clamp, and a transmission component. The support plate is horizontally slidably connected to the bottom of the slot. A support plate spring is provided between the support plate and the side wall of the slot. The support plate has an opening and a connecting groove communicating with the opening. The fixing clamp is slidably connected to the opening through a connecting plate. The transmission component is provided in the connecting groove and is used to drive the fixing clamp to move up and down when the support plate moves.

[0011] Preferably, the transmission component includes a transverse rack, a vertical rack, a driving wheel, and a driven wheel. The transverse rack is fixed to the bottom of the slot and located within the connecting groove. A rotating shaft is rotatably connected within the connecting groove. The driving wheel and the driven wheel are coaxially fixed on the rotating shaft. The driving wheel meshes with the transverse rack. The vertical rack is fixed to one side of the connecting plate and meshes with the driven wheel.

[0012] Preferably, positioning grooves are provided on both sides of the bottom of the card slot, and a positioning block that slides with the positioning groove is fixed at the bottom of the tray.

[0013] Preferably, both ends of one side of the tray are provided with sliding grooves, and sliders are slidably connected in both sliding grooves, and the sliders are fixedly connected to the fixed clamping plate.

[0014] The beneficial effects of this invention are as follows: 1. By setting up an upper mold mechanism and a lower mold mechanism, when bending the spring sheet, the spring sheet is placed between two lower mold seats. At this time, the motor is started, and the motor drives the double-headed screw to rotate, thereby causing the two lower mold seats to clamp the two sides of the spring sheet. After clamping, the upper mold mechanism is started, and the hydraulic cylinder drives the upper template to move downward, thereby causing the upper mold head to press the top of the spring sheet. When the spring sheet is bent to a certain extent, the upper mold mechanism stops pressing the spring sheet. At the same time, the motor is started again, and the motor drives the double-headed screw to rotate again. At this time, the two lower mold seats will squeeze the two sides of the spring sheet, thereby bending the spring sheet again through the squeezing of the lower mold seats. Through the initial bending of the spring sheet by the upper mold mechanism and the secondary bending of the spring sheet by the lower mold mechanism, the bending effect of the spring sheet can be effectively improved. By bending the spring sheet twice, it is possible to prevent the spring sheet from falling off due to the increase in the pressing amplitude, which would affect the bending of the spring sheet, and at the same time, it is possible to avoid the impact of a single bending. Excessive bending can damage the spring. Initial bending generates heat at the bent portion of the spring, allowing it to bend effectively upon re-bending, thus preventing breakage. 2. This invention, through its lower die mechanism and fixing mechanism, allows the support plate to move towards the slot under pressure when the spring is re-bent via the lower die mechanism. The drive wheel moves synchronously with the support plate, engaging with the transverse rack. This engagement causes the drive wheel to rotate, simultaneously driving the driven wheel to rotate. The driven wheel's rotation then drives the vertical rack downwards, and the connecting plate moves the fixing clamp downwards synchronously with the vertical rack. This fixing clamp secures both sides of the spring, preventing it from detaching from the lower die due to positional differences during compression, thus affecting the bending effect. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of a bending die for spring processing proposed in this invention; Figure 2 is a front view schematic diagram of the bending die for spring processing proposed in this invention; Figure 3 is a schematic diagram of the upper die mechanism of the bending die for spring processing proposed in this invention; Figure 4 is a schematic diagram of the lower die mechanism of the bending die for spring processing proposed in this invention; Figure 5 is a partial structural schematic diagram of the bending die for spring processing proposed in this invention; Figure 6 is a cross-sectional schematic diagram of the fixing mechanism of the bending die for spring processing proposed in this invention; Figure 7 is a schematic diagram of the support plate structure of the bending die for spring processing proposed in this invention; Figure 8 is a schematic diagram of the fixing mechanism of the bending die for spring processing proposed in this invention.

[0016] In the attached diagram: 1. Machine base; 2. Upper mold mechanism; 3. Lower mold mechanism; 4. Hydraulic cylinder; 5. Upper template; 6. Support base; 7. Upper mold head; 8. Support plate; 9. Connecting seat; 10. Groove; 11. Motor; 12. Support block; 13. Double-ended screw; 14. Lower mold base; 15. Fixing mechanism; 16. Slot; 17. Support plate; 18. Positioning block; 19. Through opening; 20. Connecting groove; 21. Slide groove; 22. Fixing clamping plate; 23. Slider; 24. Horizontal rack; 25. Rotating shaft; 26. Driving wheel; 27. Driven wheel; 28. Vertical rack; 29. ​​Connecting plate. Detailed Implementation

[0017] Example 1, referring to Figures 1-5, a bending die for processing spring sheets includes a base 1, an upper die mechanism 2, and a lower die mechanism 3. The upper die mechanism 2 is detachably installed on the top of the base 1, and the lower die mechanism 3 is detachably installed on the bottom of the base 1. The upper die mechanism 2 and the lower die mechanism 3 are positioned correspondingly, facilitating the upper die mechanism 2 to press and bend the spring sheet located on the lower die mechanism 3. The lower die mechanism 3 consists of two lower die seats 14 and an extrusion assembly. The two lower die seats 14 are fixed on both sides of the top of the extrusion assembly. The extrusion assembly drives the two lower die seats 14 to move, clamping both sides of the spring sheet. After the upper die mechanism 2 has initially bent the spring sheet, the extrusion assembly drives the two lower die seats 14 to move, thereby bending the spring sheet again through the two lower die seats 14. Bending the spring sheet twice can prevent the spring sheet from falling off due to increased pressing amplitude, thus avoiding the impact on the bending of the spring sheet, while also avoiding the damage to the spring sheet caused by a large bending amplitude in one go. Damage is caused by the initial bending of the spring, which generates heat at the bent part. When bent again, the spring can be effectively bent under the action of heat, thus preventing the spring from breaking during bending. The extrusion assembly includes a support plate 8, a connecting seat 9, a motor 11, a double-ended screw 13, and two support blocks 12. The support plate 8 is fixed to the machine base 1 by bolts. The connecting seat 9 is fixedly connected to the top of the support plate 8 by bolts. The top of the connecting seat 9 has slots 10 on both sides. The two slots 10 are rotatably connected to the double-ended screw 13 by bearings. The motor 11 is installed on one side of the connecting seat 9 by bolts. One end of the motor 11 is fixedly connected to the double-ended screw 13. The two support blocks 12 are symmetrically slidably connected in the two slots 10. The two support blocks 12 have threaded openings on one side. The threaded openings are threaded to the double-ended screw 13. The thread directions on both sides of the double-ended screw 13 are opposite. The two lower die seats 14 are fixed to the two support blocks 12 by bolts.

[0018] When bending the spring sheet, the spring sheet is placed between two lower die bases 14. At this time, the motor 11 is started, and the motor 11 drives the double-headed screw 13 to rotate, so that the two lower die bases 14 clamp the two sides of the spring sheet. After clamping, the upper die mechanism 2 is started, so that the upper die mechanism 2 presses the top of the spring sheet. When the spring sheet is bent to a certain extent, the upper die mechanism 2 stops pressing the spring sheet. At the same time, the motor 11 is started again, and the motor 11 drives the double-headed screw 13 to rotate again. At this time, the two lower die bases 14 will squeeze the two sides of the spring sheet, so that the spring sheet is bent again by the squeezing of the lower die bases 14.

[0019] In this invention, the upper mold mechanism 2 includes a hydraulic cylinder 4, an upper template 5, a support base 6, and an upper mold head 7. The hydraulic cylinder 4 is fixed to the machine base 1 by bolts, and its bottom is fixedly connected to the upper template 5 by bolts. The support base 6 is welded to the bottom of the upper template 5. The upper mold head 7 is detachably installed at the bottom of the support base 6. When bending the spring sheet, the hydraulic cylinder 4 drives the upper template 5 to move downward until the upper mold head 7 presses on the upper surface of the spring sheet. At this time, the upper mold mechanism 2 will perform pre-bending treatment on the spring sheet, so that the spring sheet is bent to a certain extent.

[0020] In this invention, in order to improve the movement effect of the support block 12 inside the slot 10, the width of the support block 12 is the same as the width of the slot 10, so that the support block 12 can move along the direction of the slot 10.

[0021] Example 2, referring to Figures 1-8, is a bending die for processing spring sheets. Compared with Example 1, the lower die base 14 has a slot 16 on its top, and a fixing mechanism 15 is provided on one side of the slot 16. The fixing mechanism 15 cooperates with the lower die mechanism 3 to fix the spring sheet when the lower die mechanism 3 is pressing the spring sheet, thereby improving the bending stability of the spring sheet and improving the bending effect of the spring sheet.

[0022] Based on the above, the fixing mechanism 15 includes a support plate 17, a fixing clamp 22, and a transmission component. Positioning grooves are provided on both sides of the bottom of the slot 16. Positioning blocks 18 are slidably connected to the inner walls of the two positioning grooves. The positioning blocks 18 are fixed to the bottom of the support plate 17. A support plate spring is provided between one side of the support plate 17 and the slot 16, enabling the reciprocating movement of the support plate 17. A through-hole 19 is provided on one side of the support plate 17, and a connecting plate 29 is slidably connected within the through-hole 19. The fixing clamp 22 is fixed to the connecting plate 29 with bolts. A connecting groove 20 is provided on one side of the through-hole 19. The connecting plate 29 and the slot 16 are connected by a transmission component.

[0023] Based on the above, the transmission component consists of a transverse rack 24, a vertical rack 28, a driving wheel 26, and a driven wheel 27. The bottom of the slot 16 is provided with a rack groove, and the transverse rack 24 is fixed inside the rack groove. Both ends of the connecting groove 20 are connected to rotating shafts 25 by bearings. The driving wheel 26 and the driven wheel 27 are respectively fixedly sleeved on the two rotating shafts 25. The driving wheel 26 and the driven wheel 27 mesh with each other. The driving wheel 26 meshes with the transverse rack 24, and the driven wheel 27 meshes with the vertical rack 28. The vertical rack 28 is detachably installed on one side of the connecting plate 29.

[0024] When the spring is bent again by the lower die mechanism 3, the support plate 17 will move to one side of the slot 16 under pressure, and the drive wheel 26 will move synchronously with the movement of the support plate 17. When the drive wheel 26 moves, it will mesh with the transverse rack 24, and the drive wheel 26 will rotate under the meshing of the transverse rack 24. When the drive wheel 26 rotates, it will drive the driven wheel 27 to rotate through meshing. At this time, when the driven wheel 27 rotates, it will drive the vertical rack 28 to move downward, and the connecting plate 29 will drive the fixing clamp 22 to move downward synchronously with the downward movement of the vertical rack 28. Thus, the fixing clamp 22 fixes both sides of the spring and prevents the spring from falling off the two lower die seats 14 due to the difference in position on both sides of the spring when it is squeezed, thereby affecting the bending effect of the spring.

[0025] Based on the above, in order to improve the stability of the fixing plate 22 in fixing the spring, a sliding groove 21 is provided at both ends on one side of the support plate 17. A slider 23 is slidably connected to the inner wall of the two sliding grooves 21, and the slider 23 is fixedly connected to the fixing plate 22.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bending die for processing spring sheets, comprising a base (1), an upper die mechanism (2), and a lower die mechanism (3), wherein the upper die mechanism (2) is detachably mounted on the top of the base (1), and the lower die mechanism (3) is detachably mounted on the bottom of the base (1), and the upper die mechanism (2) and the lower die mechanism (3) are positioned correspondingly, characterized in that, The lower die mechanism (3) includes two lower die bases (14) and an extrusion assembly. The two lower die bases (14) are fixed on both sides of the top of the extrusion assembly. The extrusion assembly is used to drive the two lower die bases (14) to move closer or further away from each other. After the upper die mechanism (2) completes the initial bending of the spring sheet, the extrusion assembly drives the two lower die bases (14) to move, thereby bending the spring sheet again through the two lower die bases (14).

2. A bending die for processing reeds according to claim 1, characterized in that, The extrusion assembly includes a support plate (8), a connecting seat (9), a motor (11), a double-ended screw (13), and two support blocks (12). The support plate (8) is fixed on the machine base (1), and the connecting seat (9) is fixed on the top of the support plate (8). The top of the connecting seat (9) has slots (10) on both sides. The double-ended screw (13) is rotatably connected in the two slots (10). The motor (11) is installed on one side of the connecting seat (9), and the output end of the motor (11) is fixedly connected to one end of the double-ended screw (13). The two support blocks (12) are symmetrically slidably connected in the two slots (10). The two support blocks (12) are threadedly connected to both sides of the double-ended screw (13), and the thread directions on both sides of the double-ended screw (13) are opposite. The two lower die seats (14) are fixed on the two support blocks (12).

3. A bending die for processing reeds according to claim 2, characterized in that, The width of the support block (12) is adapted to the width of the slot (10).

4. A bending die for processing reeds according to claim 1, characterized in that, The upper mold mechanism (2) includes a hydraulic cylinder (4), an upper template (5), a support base (6) and an upper mold head (7). The hydraulic cylinder (4) is fixed on the machine base (1) and its output end is fixedly connected to the upper template (5). The support base (6) is fixed at the bottom of the upper template (5). The upper mold head (7) is detachably installed at the bottom of the support base (6).

5. A bending die for processing reeds according to claim 1, characterized in that, The top of the lower mold base (14) is provided with a slot (16) for placing the spring sheet. A fixing mechanism (15) is provided on one side of the slot (16). The fixing mechanism (15) is used to fix the spring sheet when the lower mold mechanism (3) squeezes the spring sheet.

6. A bending die for processing reeds according to claim 1, characterized in that, The fixing mechanism (15) includes a support plate (17), a fixing clamp (22), and a transmission component. The support plate (17) is horizontally slidably connected to the bottom of the slot (16). A support plate spring is provided between the support plate (17) and the side wall of the slot (16). The support plate (17) has an opening (19) and a connecting groove (20) connected to the opening (19). The fixing clamp (22) is slidably connected to the opening (19) through a connecting plate (29). The transmission component is provided in the connecting groove (20) and is used to drive the fixing clamp (22) to move up and down when the support plate (17) moves.

7. A bending die for processing reeds according to claim 6, characterized in that, The transmission component includes a transverse rack (24), a vertical rack (28), a driving wheel (26), and a driven wheel (27). The transverse rack (24) is fixed at the bottom of the slot (16) and located in the connecting groove (20). A rotating shaft (25) is rotatably connected in the connecting groove (20). The driving wheel (26) and the driven wheel (27) are coaxially fixed on the rotating shaft (25). The driving wheel (26) meshes with the transverse rack (24). The vertical rack (28) is fixed on one side of the connecting plate (29) and meshes with the driven wheel (27).

8. A bending die for processing reeds according to claim 7, characterized in that, The card slot (16) has positioning grooves on both sides of its bottom, and the bottom of the tray (17) is fixed with a positioning block (18) that slides with the positioning groove.

9. A bending die for processing reeds according to claim 6, characterized in that, The tray (17) has grooves (21) at both ends on one side, and sliders (23) are slidably connected in both grooves (21). The sliders (23) are fixedly connected to the fixed clamp (22).

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