Down-draw high speed punch

Abstract

The application relates to a high-speed down-drawing punch, which comprises a base, a transmission part arranged in the base, a workbench arranged at the upper end of the base, a sliding block driven by the transmission part arranged above the workbench, a crankshaft, a connecting rod assembly, a balance block and a pull plate, a flywheel drivingly connected with the crankshaft is arranged outside the base, the balance block is movably arranged in the base above the crankshaft through a first guide column, two pull plates are symmetrically arranged at the two sides of the balance block and are respectively connected with the sliding block through second guide columns, the crankshaft is connected with the balance block and the pull plate through the toggle type connecting rod assembly to drive the balance block and the pull plate to move up and down, and the pull plate drives the sliding block to move up and down. The toggle type connecting rod assembly makes the motion curve of the sliding block near the lower dead point more stable, is beneficial to the forming requirement of super-high-precision products, prolongs the service life of a die, and makes the equipment realize dynamic balance during stamping work through the balance block, so that the machine table is more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-speed punch, in particular to a down-draw high-speed punch. BACKGROUND

[0002] The down-draw high-speed punch is also called bottom transmission high-speed punch, which is named because the transmission components are arranged at the bottom, and is different from the conventional high-speed punch with the transmission components arranged at the top, such as the high-speed punch stamping lower dead point residence time adjusting device disclosed in the application No. CN201220553245.3 and the transmission device of the high-speed punch disclosed in the application No. CN201320698305.5. The down-draw high-speed punch has lower height and lower vibration source because the transmission components are arranged at the bottom and only the slider is arranged above the transmission components, and the down-draw high-speed punch is more stable during working. At present, the down-draw high-speed punch generally has a crankshaft transmission structure, and the motion curve of the slider is abrupt and steep near the lower dead point, and the down-draw high-speed punch does not have a dynamic balancing device. Therefore, it is necessary to optimize the structure of the down-draw high-speed punch. SUMMARY

[0003] In order to solve the problems in the prior art, the present application provides a down-draw high-speed punch with toggle transmission.

[0004] In order to achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows: the down-draw high-speed punch comprises a base and a transmission component, the transmission component is arranged inside the base, the upper end of the base is provided with a workbench, a slider driven by the transmission component is arranged above the workbench, the transmission component comprises a crankshaft, a connecting rod assembly, a balancing block and a pull plate, a flywheel driven connected with the crankshaft is arranged outside the base, the balancing block is movably arranged inside the base above the crankshaft through a first guide column, two pull plates are symmetrically arranged on both sides of the balancing block and connected with the slider through a second guide column respectively, the crankshaft is connected with the balancing block and the pull plate through the toggle connecting rod assembly to drive the balancing block and the pull plate to move up and down, and the pull plate drives the slider to move up and down.

[0005] The toggle connecting rod assembly can make the motion curve of the slider more stable near the lower dead point, which is beneficial to the forming requirement of ultra-high precision products, beneficial to the protection of the mold, can significantly improve the service life of the mold, and can reduce the acceleration of the slider near the lower dead point, reduce the inertial force and improve the stamping precision; the balancing block can make the equipment achieve dynamic balance during stamping work, and make the machine more stable.

[0006] Further, the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod and a first pin shaft, one end of each of the first connecting rod, the second connecting rod and the third connecting rod is connected with the first pin shaft, the other end of each of the first connecting rod, the second connecting rod and the third connecting rod is connected with a crankshaft, a balance block and a draw plate respectively, the second connecting rod is arranged upwardly and is connected with the balance block through a second pin shaft, and the third connecting rod is arranged upwardly and is connected with the draw plate through a third pin shaft; the first pin shaft is provided with a sliding block at both ends, the inner wall of the base is provided with a track for the sliding block to slide, and the crankshaft drives the first pin shaft to move along the track through the first connecting rod. The second connecting rod connected with the balance block and the third connecting rod connected with the draw plate are symmetrically arranged, the sliding block and the balance block move up and down relative to each other during movement, so that dynamic balance is realized, and meanwhile, the second connecting rod and the third connecting rod are symmetrically arranged and move upward at the same time, so that the overall height of the machine can be compressed.

[0007] Further, the sliding block is fixed to the upper and lower end faces of the first pin shaft, and a pair of pad irons is fixed to the inner wall of the base, and the pair of pad irons form a track for the sliding block to slide. The first pin shaft is guided to move linearly and reciprocally through the track, so that the circular motion of the crankshaft is converted into the linear motion of the first pin shaft, and the balance block and the sliding block are driven to move up and down reciprocally.

[0008] Further, the third pin shaft is connected with the draw plate through an adjustable die adjusting assembly. The distance between the draw plate and the third connecting rod is adjusted through the adjustable die adjusting assembly, so that the distance between the sliding block and the workbench is adjusted, and the die of the equipment is adjusted.

[0009] Further, the crankshaft is connected with two groups of connecting rod assemblies, and the axis of the crankshaft and the axes of the two first pin shafts in the two groups of connecting rod assemblies are arranged in the same plane. The two groups of connecting rod assemblies are symmetrically arranged on both sides of the crankshaft, so that the reciprocating motions of the two first pin shafts are opposite to each other, and the vibration of the equipment is reduced.

[0010] Further, the top of the base is provided with a guide sleeve, the second guide column is arranged in the guide sleeve and is in sliding connection with the guide sleeve, and the upper and lower ends of the second guide column are fixedly connected with the sliding block and the draw plate through nuts. The sliding block and the draw plate are connected together through the second guide column and move up and down together.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] 1. The toggle type connecting rod assembly can make the motion curve of the sliding block more stable near the lower dead point, is beneficial to the forming requirement of ultra-high precision products, is beneficial to the protection of the die, and can significantly improve the service life of the die;

[0013] 2. The toggle type connecting rod assembly can reduce the acceleration of the sliding block near the lower dead point, reduce the inertial force and improve the stamping precision;

[0014] 3. The dynamic balance is realized by the balance block when the equipment is punched, so that the machine is more stable; the second connecting rod connected with the balance block and the third connecting rod connected with the sliding block are symmetrically arranged, and the sliding block and the balance block move up and down relative to each other when moving, so that the dynamic balance is realized.

[0015] 4. The second connecting rod connected with the balance block and the third connecting rod connected with the sliding block are symmetrically arranged and upwardly arranged at the same time, so that the overall height of the machine can be compressed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a side view structure schematic diagram of the present application.

[0017] Figure 2 is Figure 1 a cross-sectional structure schematic diagram of B-B` in FIG.

[0018] Figure 3 is Figure 2 a cross-sectional structure schematic diagram of C-C` in FIG.

[0019] Figure 4 is Figure 2 a cross-sectional structure schematic diagram of D-D` in FIG.

[0020] Figure 5 is Figure 2 a cross-sectional structure schematic diagram of E-E` in FIG.

[0021] In the figure: 1, base; 11, guide sleeve; 12, first guide column; 13, track; 14, pad iron; 15, shaft sleeve; 2, sliding block; 3, crankshaft; 4, connecting rod assembly; 41, first connecting rod; 42, second connecting rod; 43, third connecting rod; 5, balance block; 6, pull plate; 71, first pin shaft; 711, sliding block; 72, second pin shaft; 73, third pin shaft; 8, die adjusting assembly; 81, screw; 82, die adjusting nut; 83, locking oil cylinder; 9, second guide column; 91, nut sleeve; 101, workbench; 102, flywheel; 103, clutch. DETAILED DESCRIPTION

[0022] The technical solutions of the present application are further described below in combination with the drawings and specific embodiments.

[0023] As Figure 1 shown, the figure is a side view structure diagram of the punch, and it can be seen that the base 1 of the lower part of the punch occupies a larger volume, and the sliding block 2 of the upper part occupies a smaller volume. The flywheel 102 is arranged outside the base 1, so that the overall height and the center of gravity of the punch are relatively low, so that the punch is relatively stable when working.

[0024] Embodiment 1,

[0025] As Figure 1 ,Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the pull-down high-speed punch press includes a base 1 and a transmission component. The transmission component is located inside the base 1. A worktable 101 is provided at the upper end of the base 1. A slider 2 driven by the transmission component is provided above the worktable 101. The transmission component includes a crankshaft 3, a connecting rod assembly 4, a balance block 5, and a pull plate 6. A flywheel 102 connected to the crankshaft 3 is provided outside the base 1. The balance block 5 is movably disposed inside the base 1 and located above the crankshaft 3 via a first guide post 12. Two pull plates 6 are symmetrically disposed on both sides of the balance block 5 and are respectively connected to the slider 2 via second guide posts 9. The crankshaft 3 is connected to the balance block 5 and the pull plate 6 via a toggle-type connecting rod assembly 4 to drive the balance block 5 and the pull plate 6 to move up and down. The pull plate 6 drives the slider 2 to move up and down together.

[0026] The transmission components are placed inside the base 1, and the only moving part above is the slider 2. Therefore, compared with high-speed presses of the same tonnage, the height of the pull-down high-speed press in this embodiment is lower. Because the transmission components are placed below, the vibration source is low, so the stamping operation is more stable. Since the slider 2, pull plate 6, and balance block 5 of the moving parts are subject to gravity, the overall clearance can be naturally eliminated, which significantly improves the accuracy of the bottom dead center. Since the worktable 101 and above is only the slider 2, no lubricating oil is needed on the slider 2, so there can be absolutely no lubricating oil contamination, which is suitable for the requirements of food-grade industrial products.

[0027] like Figure 2 As shown, the workbench 101 is fixed to the upper surface of the base 1 with screws. Below the workbench 101 are two vertically arranged first guide posts 12. The lower ends of the two first guide posts 12 are respectively inserted through the two ends of the balance block 5 along its length and are slidably connected to it. The area of ​​the slider 2 is larger than that of the workbench 101. Each of the four corners of the slider 2 is connected to a second guide post 9, for a total of four second guide posts 9. The top of the base 1 is provided with four guide sleeves 11 on the outside of the workbench 101. The four second guide posts 9 are respectively inserted into the four guide sleeves 11 and are slidably connected to the guide sleeves 11. The slider 2 moves stably up and down through the four second guide posts 9. The upper and lower ends of the second guide posts 9 are fixed to the slider 2 and the pull plate 6 respectively through the nut sleeves 91. The slider 2 and the pull plate 6 are connected together through the second guide posts 9 and move up and down together.

[0028] The toggle-type connecting rod assembly 4 makes the motion curve of the slider 2 near the bottom dead center more stable, which is beneficial to the forming requirements of ultra-high precision products, protects the mold, and can significantly improve the mold life. At the same time, it can reduce the acceleration of the slider 2 near the bottom dead center, reduce the inertial force, and thus improve the stamping accuracy. The balance block 5 enables the equipment to achieve dynamic balance during stamping operation, making the machine more stable.

[0029] likeFigure 2 As shown in the drawings, the connecting rod assembly 4 comprises a first connecting rod 41, a second connecting rod 42, a third connecting rod 43, a first pin shaft 71, one end of each of the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43 is connected with the first pin shaft 71, the other end of each of the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43 is connected with the crankshaft 3, the balance block 5 and the pull plate 6 respectively, the second connecting rod 42 is upwardly inclined and connected with the balance block 5 through a second pin shaft 72, and the third connecting rod 43 is upwardly inclined and connected with the pull plate 6 through a third pin shaft 73; the first pin shaft 71 is provided with a sliding block 711 at both ends, the inner wall of the base 1 is provided with a track 13 for the sliding of the sliding block 711, and the crankshaft 3 drives the first pin shaft 71 to move along the track 13 through the first connecting rod 41.

[0030] The second connecting rod 42 connected with the balance block 5 and the third connecting rod 43 connected with the pull plate 6 are symmetrically arranged, the sliding block 2 and the balance block 5 move up and down relative to each other during movement, so as to realize dynamic balance, and the second connecting rod 42 and the third connecting rod 43 are symmetrically arranged and simultaneously upward, so as to compress the overall height.

[0031] As shown in the drawings, Figure 4 The sliding block 711 is fixed to the upper and lower end faces of the first pin shaft 71, and a pair of pad irons 14 is fixed to the inner wall of the base 1, the pair of pad irons 14 forms the track 13 for the sliding of the sliding block 711, the track 13 is arranged in the horizontal direction, the first pin shaft is guided to move linearly through the track 13, so as to convert the circular motion of the crankshaft 3 into the linear motion of the first pin shaft 71, and drive the balance block 5 and the sliding block 2 to move up and down reciprocatingly. The sliding block 711 is used to ensure that the first pin shaft 71 and the track 13 have a good sliding connection relationship, and the sliding block 711 can be a ball rolling block.

[0032] As shown in the drawings, Figure 5 The third pin shaft 73 is connected with the pull plate 6 through the adjustable mold adjusting assembly 8. The distance between the pull plate 6 and the third connecting rod 43 is adjusted through the mold adjusting assembly 8, so as to adjust the distance between the sliding block 2 and the workbench 101, and realize the mold adjustment of the equipment. The mold adjusting assembly 8 comprises a screw rod 81, a mold adjusting nut 82 and a locking oil cylinder 83, the mold adjusting nut 82 is movably arranged at the lower end opening of the locking oil cylinder 83, a sealing ring is arranged between the upper end of the mold adjusting nut 82 and the inner wall cavity of the locking oil cylinder 83, the lower end of the screw rod 81 is connected with the third pin shaft 73, the upper end of the screw rod 81 penetrates through the mold adjusting nut 82, the screw rod 81 is threadedly connected with the mold adjusting nut 82, the distance between the mold adjusting nut 82 and the screw rod 81 is adjusted by rotating the mold adjusting nut 82, after the adjustment is completed, the mold adjusting nut 82 is pressed downward by injecting hydraulic oil into the locking oil cylinder 83, so that the threads between the mold adjusting nut 82 and the screw rod 81 are locked.

[0033] The crankshaft 3 is connected with two sets of connecting rod assemblies 4, the axis of the crankshaft 3 and the axis of two first pin shafts 71 in the two sets of connecting rod assemblies 4 are arranged in the same plane. The two sets of connecting rod assemblies 4 are symmetrically arranged on both sides of the crankshaft 3, so that the reciprocating motion of the two first pin shafts 71 is opposite to each other, thereby reducing the vibration of the device.

[0034] Embodiment 2,

[0035] As Figure 2 , Figure 3 shown, compared with embodiment 1, the embodiment also includes a clutch 103, the base 1 is provided with a shaft sleeve 15, the crankshaft 3 is transversely arranged, the crankshaft 3 is arranged in the shaft sleeve 15 and is rotatably arranged on the base 1 through a bearing, the crankshaft 3 extends out of the shaft sleeve 15 and is exposed outside the base 1, the clutch 103 and the flywheel 102 are arranged on the outer circumference of the exposed part of the crankshaft 3, the flywheel 102 is sleeved on the shaft sleeve 15, the flywheel 102 is connected with the motor through a belt, and the clutch 103 is connected with the crankshaft 3. The clutch 103 is a dry magnetic clutch 103, the transmission between the flywheel 102 and the crankshaft 3 is controlled through the clutch 103, the motor drives the flywheel 102 to rotate through the belt, and the clutch 103 drives the crankshaft 3 to rotate after being attracted.

[0036] The specific motion process is as follows: the motor drives the flywheel 102 to rotate through the belt, the clutch 103 drives the crankshaft 3 to rotate after being attracted, the crankshaft 3 rotates to drive the first connecting rod 41 and the slider 711 on the first pin shaft 71 to slide along the anvil 14, the slider 711, the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43 are connected with the first pin shaft 71 at the same time, the first pin shaft 71 drives the second connecting rod 42 and the third connecting rod 43 to move, the third connecting rod 43 drives the third pin shaft 73, the mold adjusting assembly 8, the pull plate 6, the second guide column 9 and the sliding block 2 to move up and down along the guide sleeve 11, since the second connecting rod 42 and the third connecting rod 43 are symmetrically arranged, the sliding block 2 and the balance block 5 move up and down relative to each other, dynamic balance is achieved, and the balance block 5 moves up and down along the first guide column 12.

[0037] The above is not intended to limit the technical scope of the present application in any way, and any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A pull-down high-speed punch press, characterized in that, The system includes a base and a transmission component. The transmission component is located inside the base, and a worktable is located on the upper end of the base. A slider driven by the transmission component is located above the worktable. The transmission component includes a crankshaft, a connecting rod assembly, a balance weight, and a pull plate. A flywheel connected to the crankshaft is located outside the base. The balance weight is movably mounted inside the base and located above the crankshaft via a first guide post. Two pull plates are symmetrically arranged on both sides of the balance weight and are respectively connected to the slider via second guide posts. The crankshaft is connected to the balance weight and pull plates via a toggle-type connecting rod assembly to drive the balance weight and pull plates to move up and down. The pull plates drive the slider to move up and down together. The connecting rod assembly includes a first connecting rod, a second connecting rod, a third connecting rod, and a first pin. One end of each of the first, second, and third connecting rods is connected to the first pin. The other end of each of the first, second, and third connecting rods is connected to a crankshaft, a balance block, and a pull plate, respectively. The second connecting rod is inclined upwards and connected to the balance block via the second pin. The third connecting rod is inclined upwards and connected to the pull plate via the third pin. Sliders are provided at both ends of the first pin. The inner wall of the base is provided with a track for the sliders to slide along. The crankshaft drives the first pin to move along the track via the first connecting rod.

2. The pull-down high-speed punch press according to claim 1, characterized in that, The slider is fixed to the upper and lower end faces of the first pin, and a pair of pads are fixed to the inner wall of the base, forming a track for the slider to slide between the pair of pads.

3. The pull-down high-speed punch press according to claim 1, characterized in that, The third pin is adjustablely connected to the pull plate via the mold adjustment assembly.

4. The pull-down high-speed punch press according to claim 1, characterized in that, The crankshaft is connected to two sets of connecting rod assemblies, and the axis of the crankshaft and the axes of the two first pins in the two sets of connecting rod assemblies are arranged in the same plane.

5. The pull-down high-speed punch press according to claim 1, characterized in that, The top of the base is provided with a guide sleeve, the second guide post passes through the guide sleeve and is slidably connected to the guide sleeve, and the upper and lower ends of the second guide post are fixed to the slider and the pull plate respectively by nut sleeves.

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