A stamping die loading and unloading device for a press

Abstract

The present invention discloses a stamping die loading and unloading device for a press, which relates to the technical field of die stamping equipment. The die loading and unloading device includes a workbench and a loading and unloading mechanism. The loading and unloading mechanism includes a displacement component and swing rods. The paired swing rods are symmetrically arranged along the displacement direction of the die set. The output end of the displacement component is in transmission connection with the swing rods. The side surface of the swing end of the swing rod is in frictional contact and cooperation with the circumferential side surface of the lower die base in the die set. When the swing rods swing relative to each other, the swing ends of the swing rods squeeze and push the die set to move in the direction close to the stamping position. When the swing rods swing away from each other, the displacement component drives the swing rods to move in the direction close to the stamping position. The loading and unloading mechanism further includes a blanking component. The blanking component is arranged on the workbench and is located on the side of the workbench where the stamping position is far from the swing rods. The blanking component is used to displace the die set from the stamping position to the replacement position. The die loading and unloading device realizes fine adjustment of the die set to the center and precise linear displacement.

Description

Technical Field

[0001] The invention belongs to the technical field of die stamping equipment, and in particular relates to a stamping die assembly and disassembly device for a press. Background Art

[0002] A press is a piece of machinery that uses mechanical, hydraulic, or pneumatic pressure to generate pressure to perform processes such as forming, shearing, punching, and pressing. In sheet metal stamping technology, presses are widely used in processes such as cutting, punching, blanking, bending, riveting, and forming. They apply strong pressure to metal blanks, causing them to plastically deform and fracture, thus forming parts.

[0003] At present, the stamping dies used in stamping machines are of large mass. During loading and unloading, multiple people are required to lift them, and even special lifting equipment or forklift equipment is needed for moving operations. Specifically, the lifting equipment lifts the replaced new stamping die in the air and places it on the mobile machine tool. During the placement process, multiple people are required to adjust the position of the die. Not only is the labor efficiency low and the labor intensity high, but more importantly, whether it is a forklift or multiple people working together to push the die, the uneven force will cause the die to become skewed after entering the stamping position of the machine tool workbench, and it is impossible to meet the requirements of precise fine-tuning of the die position. Summary of the Invention

[0004] The purpose of the present invention is to provide a stamping die loading and unloading device for a press machine with a simple structure and reasonable design in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A stamping die loading and unloading device for a press machine, comprising:

[0007] A workbench is provided on the workbench, and the loading and unloading mechanism is used to convert the stamping die set between the stamping position and the replacement position. The loading and unloading mechanism includes a shift assembly and a rocker arm. The rocker arms are arranged in pairs and are symmetrically arranged along the shift direction of the die set. The output end of the shift assembly is transmission-connected to the rocker arm. Under the drive of the shift assembly, the rocker arms are arranged in pairs in opposite directions. The side surfaces of the rocker arms' rocking ends are frictionally engaged with the circumferential side surfaces of the lower die base in the die set.

[0008] When the paired swing arms swing relative to each other, the swing end side surfaces of the swing arms rub against the circumferential side surfaces of the lower die base and squeeze and push the die set to move in the displacement direction toward the stamping position;

[0009] When the paired swing rods swing away from each other, the shifting assembly drives the swing rods to move in a direction close to the stamping position along the shifting direction;

[0010] The loading and unloading mechanism further includes a blanking component, which is arranged on the workbench, and the blanking component is located on one side of the stamping position on the workbench away from the swing rod. The blanking component is used to shift the die set to be replaced from the stamping position to the replacement position.

[0011] As a further optimized solution of the present invention, the shifting component includes a swing driving component and a shifting driving component. The swing driving component includes a driving member, a crankshaft, a driving gear, and a first connecting rod. One end of the swing rod away from the swinging end is rotatably connected to the base through a limiting shaft, and the base is slidably arranged on the workbench. The lower end of the crankshaft is rotatably connected to the base, and the crank part of the crankshaft is rotatably connected with a first connecting rod. One end of the first connecting rod away from the crankshaft is rotatably connected to the swing rod. Among them, the crankshaft and the swing rod are correspondingly arranged, and the upper ends of the two crankshafts are respectively fixedly connected with driving gears, and the two driving gears mesh with each other. The input end of one of the crankshafts is drivingly connected with a driving member, and the driving member is arranged on the base through a cantilever;

[0012] Among them, the output end of the crankshaft is also drivingly connected with the input end of the shifting driving component. When the swing rod swings relatively under the drive of the driving member, the base and the workbench are relatively stationary; when the swing rod swings away from each other under the continuous drive of the driving member, the shifting driving component drives the base to drive the swing rod to move in the shifting direction towards the direction close to the stamping position.

[0013] As a further optimized solution of the present invention, the shifting driving component includes a dial, a turntable, a limiting column, a sprocket, a driven gear, and a rack. The crankshaft is also fixedly connected with a dial, and a turntable and a limiting column are fixedly connected to one side of the dial away from the driving gear. The limiting column is located outside the turntable, and the limiting column is correspondingly arranged with the arc notch of the turntable. A sprocket is arranged on one side of the turntable, and a limiting groove is opened on the sprocket. The limiting column is in driving cooperation with the sprocket through the limiting groove. A driven gear is fixedly connected to the output shaft of the sprocket, and the driven gear is in meshing transmission with a rack. The side end of the rack is fixedly connected with a bracket, and the bracket is fixedly connected with the workbench;

[0014] Among them, two sets of shifting driving components are provided, and the two sets of shifting driving components are correspondingly arranged with the swing rod.

[0015] As a further optimized solution of the present invention, a support seat is fixedly arranged on the workbench, a slide rail is opened on the support seat, and the extending direction of the slide rail is consistent with the shifting direction of the die set. A slider is fixedly connected to one side of the base facing the support seat, and the slider is slidably connected with the support seat through the slide rail.

[0016] As a further optimized solution of the present invention, the blanking component includes a telescopic shifting member and a push plate, and the output end of the telescopic shifting member is fixedly connected with the push plate.

[0017] As a further optimized solution of the present invention, a limiting component is arranged on the support seat, and the limiting component is in transmission connection with the slider. When the paired swing rods swing relatively, the limiting component is used to prevent the slider from moving in the displacement direction away from the stamping position.

[0018] As a further optimized solution of the present invention, the limiting component includes a screw rod, a slide rod, a second connecting rod, a sleeve, a spring and a limiting rod. There are two groups of the limiting components, and the two groups of limiting components are symmetrically arranged on both sides of the slide rail. The screw rod is rotationally connected to the support seat in a threaded manner, and the knob of the screw rod is located outside the support seat. The output end of the screw rod is located inside the support seat and is rotationally connected to the slide rod. The slide rod is slidably connected to the support seat. A second connecting rod is rotationally connected to the side part of the slide rod located in the inner cavity of the support seat. One end of the second connecting rod away from the slide rod is rotationally connected to a sleeve. A limiting rod is slidably connected inside the sleeve. A spring is arranged inside the sleeve. One end of the spring is fixedly connected to the limiting rod, and the other end of the spring is fixedly connected to the limiting rod. Among them, the limiting rod and the sleeve are respectively slidably connected to the support seat;

[0019] A wedge surface groove is formed on the side of the slider. The side of the wedge surface groove close to the stamping position is a stepped surface, and the side of the wedge surface groove away from the stamping position is an inclined surface.

[0020] As a further optimized solution of the present invention, the mold set further includes an upper mold base, a moving mold and a fixed mold. The fixed mold is fixedly arranged in the inner cavity of the lower mold base, and the moving mold is fixedly arranged in the inner cavity of the upper mold base. The moving mold and the fixed mold are arranged correspondingly. When the mold set is at the stamping position, the upper mold base is fixedly arranged on the stamping head of the stamping mechanism through the mounting frame, and the upper mold base has a circumferential side surface that fits with the circumferential fitting surface of the mounting frame.

[0021] As a further optimized solution of the present invention, when the mold set is at the replacement position, the overall thickness dimension value of the mold set is smaller than the distance value between the rack and the support seat.

[0022] As a further optimized solution of the present invention, a rolling groove is formed on the support seat, and a rolling rod is rotationally connected in the rolling groove. The axial direction of the rolling rod is perpendicular to the displacement direction of the mold set. Among them, the uppermost end position of the rolling rod protrudes to the upper surface position of the support seat.

[0023] The present invention has at least the following beneficial effects: a stamping die loading and unloading device for a press provided by the present invention is provided with a loading and unloading mechanism on a workbench, the loading and unloading mechanism comprising a shifting assembly, a rocking rod and a unloading assembly, wherein an old die set is shifted from a stamping position to a replacement position by means of the unloading assembly, and then the shifting assembly drives the paired rocking rods so that the swing directions of the paired rocking rods are opposite, and the rocking rods swing relative to each other, so that the rocking rods squeeze and push the new die set located at the replacement position to move toward the stamping position, and the rocking rods swing in opposite directions, so that the driven gear and the rack are meshed and transmitted, so that the base drives the rocking rod to move toward the stamping position, reducing the distance between the base and the die set, thereby realizing periodic centering fine-tuning of the die set and intermittent linear shifting to the stamping position, thereby ensuring accurate positioning of the die set;

[0024] Moreover, a limit assembly is provided in the support seat of the workbench, so that before the loading and unloading mechanism shifts the mold group, the screw is operated to make the limit rod protrude into the slide rail, so that when the slider moves within the cycle, the limit rod extends into the wedge groove and abuts against the step surface, thereby preventing the slider from moving backward when the rocker arm squeezes and pushes the mold group, thereby ensuring the position stability of the slider and the loading and unloading assembly above it. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 The present invention Figure 1 Enlarged view of point B in the middle;

[0027] Figure 3 It is a partial cross-sectional structural schematic diagram of the die assembly of the present invention when it is in the stamping position;

[0028] Figure 4 This invention Figure 1 Enlarged view of point A in the middle;

[0029] Figure 5 It is a structural schematic diagram of the loading and unloading mechanism of the present invention;

[0030] Figure 6 It is a partial structural schematic diagram of the loading and unloading mechanism of the present invention;

[0031] Figure 7 It is a partial top view structural diagram of the loading and unloading mechanism of the present invention;

[0032] Figure 8 It is a partial top view of the structure when the loading and unloading mechanism of the present invention drives the lower die base to shift;

[0033] Figure 9 It is a partial cross-sectional structural schematic diagram of the limiting assembly and the slider of the present invention when they are in the limiting position;

[0034] Figure 10 is of the present invention Figure 9 The enlarged view at position C in

[0035] In the figure: 1. Loading and unloading mechanism; 101. Base; 102. Limit shaft; 103. Swing rod; 104. First connecting rod; 105. Crankshaft; 106. Driving gear; 107. Driven gear; 108. Rack; 109. Grooved pulley; 110. Limit groove; 111. Limit post; 112. Turntable; 113. Dial; 114. Support; 115. Motor; 2. Workbench; 21. Roller; 22. Support seat; 221. Slide rail; 23. Slide block; 231. Wedge surface groove; 3. Mold set; 31. Lower mold base; 32. Fixed mold; 33. Movable mold; 34. Upper mold base; 4. Stamping mechanism; 41. Stamping head; 42. Mounting frame; 6. Limit assembly; 61. Screw; 62. Slide bar; 63. Second connecting rod; 64. Sleeve; 65. Spring; 66. Limit rod; 7. Unloading assembly. Detailed implementation manners

[0036] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following detailed implementation manners are only used to further illustrate the present application and cannot be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0037] In one embodiment, as shown in Figure 1 , Figure 3 and Figure 5 , a stamping die loading and unloading device for a press provided by the present invention includes:

[0038] A workbench 2, on which a loading and unloading mechanism 1 is provided. The loading and unloading mechanism 1 is used to convert the mold set 3 for stamping between the stamping position and the replacement position. The loading and unloading mechanism 1 includes a displacement assembly and a swing rod 103. The paired swing rods 103 are symmetrically arranged along the displacement direction of the mold set 3. The output end of the displacement assembly is in transmission connection with the swing rod 103. Driven by the displacement assembly, the swinging directions of the paired swing rods 103 are opposite. The side surface of the swinging end of the swing rod 103 is in frictional contact and cooperation with the circumferential side surface of the lower mold base 31 in the mold set 3;

[0039] When the paired swing rods 103 swing relatively, the side surface of the swinging end of the swing rod 103 is in frictional contact and extrusion with the circumferential side surface of the lower mold base 31 to push the mold set 3 to move along the displacement direction towards the direction close to the stamping position; when the paired swing rods 103 swing away from each other, the displacement assembly drives the swing rod 103 to move along the displacement direction towards the direction close to the stamping position;

[0040] The loading and unloading mechanism 1 further includes a discharging component 7. The discharging component 7 is arranged on the workbench 2, and the discharging component 7 is located on one side of the stamping position on the workbench 2 away from the swing rod 103. The discharging component 7 is used to shift the die set 3 to be replaced from the stamping position to the replacement position.

[0041] In the above embodiment, with the reciprocating swing of the symmetrically arranged swing rods 103, the die set 3 is continuously fine-tuned at the central position under the extrusion and push of the paired swing rods 103, so that it is centered and distributed, and intermittently moves in the shifting direction towards the direction close to the stamping position, so as to ensure that the die set 3 will not be skewed when it is shifted to the stamping position; it should be noted that, as Figure 1 shown, the discharging component 7 includes a telescopic shifting member and a pushing plate. The output end of the telescopic shifting member is fixedly connected with the pushing plate. After the stamping is completed and a new die set 3 needs to be replaced, at this time, the swing rod 103 is shifted to the initial position along with the base 101. With the drive of the telescopic shifting member, the pushing plate is used to push the die set 3 to be replaced out of the stamping position, so that it can be taken away from the workbench 2 by means of a forklift or a crane, without manual handling, saving manpower.

[0042] Among them, the telescopic shifting member can be a hydraulic telescopic member, an electric telescopic member, an electrical telescopic member, etc., which is not limited here.

[0043] Exemplarily, continue to refer to Figure 4 、 Figure 5 and Figure 8 , the shifting component includes a swing driving component and a shifting driving component. The swing driving component includes a driving member, a crankshaft 105, a driving gear 106 and a first connecting rod 104. One end of the swing rod 103 away from the swing end is rotatably connected to the base 101 through a limiting shaft 102. The base 101 is slidably arranged on the workbench 2. The lower end of the crankshaft 105 is rotatably connected to the base 101. The crank part of the crankshaft 105 is rotatably connected with a first connecting rod 104. One end of the first connecting rod 104 away from the crankshaft 105 is rotatably connected to the swing rod 103. Among them, the crankshaft 105 and the swing rod 103 are arranged correspondingly. The upper ends of the two crankshafts 105 are respectively fixedly connected with driving gears 106. The two driving gears 106 are meshed with each other. The input end of one of the crankshafts 105 is drivingly connected with a driving member. The driving member is arranged on the base 101 through a cantilever;

[0044] Exemplarily, the driving member can be a motor 115. As Figure 5 shown, the motor 115 is used to drive one of the crankshafts 105 to rotate;

[0045] Wherein, the output end of the crankshaft 105 is also drivingly connected to the input end of the shifting drive assembly. When the paired swing rods 103 swing relatively under the drive of the driving member, the base 101 and the workbench 2 are relatively stationary; when the paired swing rods 103 swing away from each other under the continuous drive of the driving member, the shifting drive assembly drives the base 101 to drive the swing rods 103 to move in the shifting direction towards the direction close to the stamping position.

[0046] Exemplarily, continue to refer to Figure 6 and Figure 7 ; the shifting drive assembly includes a dial 113, a turntable 112, a limit post 111, a grooved wheel 109, a driven gear 107 and a rack 108. A dial 113 is also fixedly connected to the crankshaft 105. A turntable 112 and a limit post 111 are fixedly connected to the side of the dial 113 away from the driving gear 106. The limit post 111 is located outside the turntable 112, and the limit post 111 is arranged corresponding to the arc notch of the turntable 112. A grooved wheel 109 is arranged on one side of the turntable 112. A limit groove 110 is formed in the grooved wheel 109. The limit post 111 is in driving cooperation with the grooved wheel 109 through the limit groove 110. A driven gear 107 is fixedly connected to the output shaft of the grooved wheel 109. The driven gear 107 is in meshing transmission with a rack 108. A bracket 114 is fixedly connected to the side end of the rack 108. The bracket 114 is fixedly connected to the workbench 2;

[0047] Wherein, two sets of shifting drive assemblies are provided, and the two sets of shifting drive assemblies are arranged corresponding to the swing rods 103.

[0048] In the above embodiment, the driving member drives one of the crankshafts 105, so that the two driving gears 106 mesh with each other, and the rotation directions of the crankshafts 105 are opposite. Exemplarily, taking the Figure 7 shown top view orientation as an example, the driving gear 106 on the right rotates clockwise, so that the crank portion of the crankshaft 105 drives the swing rod 103 to swing relatively through the first connecting rod 104, thereby pushing the mold set 3 placed at the replacement position towards the direction close to the stamping position. During this process, as Figure 6 shown, the turntable 112 restricts the grooved wheel 109 from rotating, so that the meshing transmission between the driven gear 107 and the rack 108 stops, thereby ensuring that the base 101 is stationary relative to the workbench 2 when the mold set 3 is shifted until the swing rod 103 swings relatively to the maximum angular displacement, as Figure 8As shown, the lower die holder 31 in the die set 3 is displaced from the dotted line position to the solid line position; and when the crankshaft 105 continues to rotate and drives the swing rod 103 to swing away from each other through the first connecting rod 104, at this time, by means of the transmission cooperation between the limit post 111 and the limit groove 110, the sheave 109 rotates, so that the driven gear 107 moves in the direction close to the stamping position under the meshing constraint of the rack 108, that is, the base 101 drives the swing rod 103 to move in the direction close to the stamping position. By repeating the above actions, continuous fine adjustment of the central position of the die set 3 can be achieved, so that it is centered and distributed, and intermittently moves in the displacement direction towards the stamping position, thereby ensuring that the die set 3 will not be skewed when it is displaced to the stamping position.

[0049] Exemplarily, continue to refer to Figure 1 and Figure 4 As shown in FIGS. and, a support base 22 is fixedly arranged on the workbench 2, a slide rail 221 is arranged on the support base 22, and the extending direction of the slide rail 221 is consistent with the displacement direction of the die set 3. A slider 23 is fixedly connected to one side of the base 101 facing the support base 22, and the slider 23 is slidably connected to the support base 22 through the slide rail 221. Thus, when the base 101 makes intermittent movement, by means of the sliding constraint between the slider 23 and the slide rail 221, the precise linear displacement of the base 101 driving the swing rod 103 is ensured, that is, the centering and deviation correction accuracy of the die set 3 is ensured.

[0050] In one embodiment, continue to refer to Figure 4 and Figure 9 A limit assembly 6 is arranged on the support base 22, and the limit assembly 6 is in transmission connection with the slider 23. When the paired swing rods 103 swing relative to each other, the limit assembly 6 is used to prevent the slider 23 from moving in the displacement direction away from the stamping position. When the paired swing rods 103 swing relative to each other, in addition to the transmission constraint of the turntable 112 on the sheave 109, the limit assembly 6 is also used to further clamp and limit the slider 23, so as to avoid the tendency of the slider 23 to move backward away from the stamping position due to the extrusion force between the swing rod 103 and the lower die holder 31.

[0051] Exemplarily, continue to refer to Figure 9, the limiting component 6 includes a screw rod 61, a sliding rod 62, a second connecting rod 63, a sleeve 64, a spring 65 and a limiting rod 66. There are two groups of limiting components 6, and the two groups of limiting components 6 are symmetrically arranged on both sides of the slide rail 221. The screw rod 61 is rotationally connected to the support base 22 in a threaded manner, and the knob of the screw rod 61 is located outside the support base 22. The output end of the screw rod 61 is located inside the support base 22 and is rotationally connected to the sliding rod 62. The sliding rod 62 is slidably connected to the support base 22. A second connecting rod 63 is rotationally connected to the side of the sliding rod 62 located in the inner cavity of the support base 22. One end of the second connecting rod 63 away from the sliding rod 62 is rotationally connected to a sleeve 64. A limiting rod 66 is slidably connected inside the sleeve 64. A spring 65 is arranged inside the sleeve 64. One end of the spring 65 is fixedly connected to the limiting rod 66, and the other end of the spring 65 is fixedly connected to the limiting rod 66. Among them, the limiting rod 66 and the sleeve 64 are respectively slidably connected to the support base 22;

[0052] A wedge surface groove 231 is formed on the side of the slider 23. One side of the wedge surface groove 231 close to the stamping position is a stepped surface, and the side of the wedge surface groove 231 away from the stamping position is an inclined surface.

[0053] It should be noted that after the mold set 3 is placed at the replacement position, by tightening the screw rod 61, the limiting rod 66 protrudes into the slide rail 221. At this time, when the slider 23 moves forward, under the extrusion of the inclined surface at the front end of the slider 23 on the limiting rod 66, the spring 65 is compressed. Thus, after the displacement of the slider 23 ends, under the action of the elastic force, the limiting rod 66 moves outward into the wedge surface groove 231, and the limiting rod 66 abuts against the stepped surface of the wedge surface groove 231, thereby preventing the slider 23 from retreating, that is, the slider 23 is located at the limiting position. And when moving forward again next time, the inclined surface of the wedge surface groove 231 is extruded against the convex surface of the limiting rod 66. Thus, after the slider 23 finishes a new forward movement, the limiting rod 66 that was originally in the wedge surface groove 231 is now located behind the slider 23; when the displacement of the mold set 3 ends, only need to unscrew the screw rod 61, so that the sliding rod 62 moves the limiting rod 66 back into the support base 22 through the second connecting rod 63, that is, the limiting end of the limiting rod 66 exits the slide rail 221, so that the backward movement of the slider 23 is not blocked.

[0054] It should be noted that continue to refer to Figure 3 , the mold set 3 further includes an upper mold base 34, a moving mold 33 and a fixed mold 32. The fixed mold 32 is fixedly arranged in the inner cavity of the lower mold base 31, and the moving mold 33 is fixedly arranged in the inner cavity of the upper mold base 34. The moving mold 33 and the fixed mold 32 are arranged correspondingly. When the mold set 3 is at the stamping position, as Figure 3As shown, the lower die base 31 is fixedly limited on the support base 22, and the upper die base 34 is fixedly arranged on the punch head 41 of the stamping mechanism 4 through the mounting frame 42. The upper die base 34 has a circumferential side surface that fits with the circumferential fitting surface of the mounting frame 42. Thus, after the die set 3 is shifted to the stamping position, there is no need to adjust the circumferential position of the die set 3. Just by clamping and fixing the upper die base 34 through the mounting frame 42, the docking position accuracy between the moving die 33 on the upper die base 34 and the fixed die 32 on the lower die base 31 can be ensured. Among them, the stamping driving part in the stamping mechanism 4 drives the punch head 41 to move up and down, so that the mounting frame 42 drives the upper die base 34 to move up and down. Among them, the stamping driving part can be a hydraulic telescopic part, an electric telescopic part, etc., which is not limited here.

[0055] Among them, the side part of the mounting frame 42 is slidably connected with the side part of the support of the stamping mechanism 4, so as to realize the stable up and down stamping work of the mounting frame 42 driving the upper die base 34 with the punch head 41.

[0056] It should be noted that through the pre-setting of the moving distance, after the die set 3 at the replacement position undergoes multiple intermittent displacements and is displaced to the stamping position, the die set 3 is at the stamping position, and there is no need for additional fine adjustment in the displacement direction at the stamping position. For different stamping dies, the structural dimensions of the lower die base 31 are the same. Only the fixed die 32 and the moving die 33 inside are selected according to the process shape requirements of product preparation. And after each loading and unloading of the die set 3, the base 101 will reset to the preset position, so as to ensure that after a limited number of intermittent displacements, the die set 3 can be accurately displaced to the stamping position each time.

[0057] It should be further noted that when the die set 3 is at the replacement position, the overall thickness dimension value of the die set 3 is smaller than the distance value between the rack 108 and the support base 22. Thus, it is convenient for the forklift to support the die set 3 from the side and send the die set 3 to the workbench 2 without being interfered by the rack 108.

[0058] Exemplarily, continue to refer to Figure 1 、 Figure 2 and Figure 4 , a rolling groove is formed on the support base 22, and a rolling rod 21 is rotatably connected in the rolling groove. The axial line direction of the rolling rod 21 is perpendicular to the displacement direction of the die set 3. Among them, the uppermost end position of the rolling rod 21 protrudes to the upper surface position of the support base 22. Thus, when the lower die base 31 is displaced, with the rolling of the rolling rod 21, the friction between the lower die base 31 and the support base 22 is reduced, facilitating the displacement.

[0059] It should be noted that when the stamping die loading and unloading device for the press is in use, the old die set 3 is pushed by the unloading component 7 from the stamping position to outside the stamping position, so that it can be carried away by a forklift, and the new die set 3 is placed at the replacement position. By tightening the screw 61, the limit rod 66 protrudes into the slide rail 221;

[0060] Start the motor 115. Under the meshing drive of the paired driving gears 106, the two crankshafts 105 respectively drive the swing rods 103 to swing through the first connecting rods 104. Under the relative swing of the paired swing rods 103, the swing ends of the swing rods 103 squeeze the lower die holder 31 and push the lower die holder 31 forward. During this process, under the constraint of the turntable 112 and the sprocket wheel 109, the driven gear 107 stops meshing and driving with the rack 108. Then, after the swing rod 103 swings to the maximum angular displacement, as Figure 8 shown, when the paired swing rods 103 swing away from each other under the continuous drive of the crankshaft 105, the dial 113 drives the limit post 111 to rotate, and under the drive of the limit post 111 and the limit groove 110 on the sprocket wheel 109, the driven gear 107 continues to mesh and drive with the rack 108, so that the base 101 drives the slider 23 to slide along the slide rail 221. Repeating the above actions can continuously fine-tune the central position of the die set 3, making it centered and intermittently moving in the displacement direction towards the direction close to the stamping position, so as to ensure that the die set 3 will not be skewed when it is displaced to the stamping position;

[0061] Moreover, when the slider 23 moves forward, by means of the extrusion between the inclined surface at the front end of the slider 23 and the limit rod 66, the limit rod 66 squeezes the spring 65, causing the limit rod 66 to retract into the support seat 22. When the slider 23 completes one movement, under the elastic force of the spring 65, the limit rod 66 extends into the wedge surface groove 231 and abuts against the step surface of the wedge surface groove 231, ensuring that when the swing rod 103 makes a relative swing in the next cycle, the slider 23 is prevented from moving backward, ensuring the extrusion and pushing effect of the swing rod 103 on the lower die holder 31;

[0062] In addition, since the lower die holder 31 and the upper die holder 34 respectively have circumferential side surfaces, when the upper die holder 34 is fixed by means of the mounting frame 42, there is no need to additionally consider the circumferential positioning of the upper die holder 34, which is convenient for installation and accurate in positioning.

[0063] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A stamping die loading and unloading device for a press, characterized in that, include: A workbench (2) is provided with a loading and unloading mechanism (1) for switching a die set (3) for stamping between a stamping position and a replacement position. The loading and unloading mechanism (1) comprises a shift assembly and a rocker (103). The rocker (103) is arranged symmetrically along the shift direction of the die set (3). The output end of the shift assembly is connected to the rocker (103) in a transmission manner. Under the drive of the shift assembly, the rocker (103) is arranged in pairs in opposite directions. The side surfaces of the rocker ends of the rocker (103) are in frictional contact with the circumferential side surfaces of the lower die base (31) of the die set (3). When the paired swing rods (103) swing relative to each other, the swing end side surfaces of the swing rods (103) rub against the circumferential side surfaces of the lower die base (31) and squeeze and push the die set (3) to move in the displacement direction toward the stamping position; When the paired swing rods (103) swing away from each other, the shifting assembly drives the swing rods (103) to move in a direction close to the stamping position along the shifting direction; The loading and unloading mechanism (1) further comprises a discharge assembly (7), which is arranged on the workbench (2) and is located on a side of the workbench (2) away from the rocker (103) at the stamping position. The discharge assembly (7) is used to shift the die set (3) to be replaced from the stamping position to the replacement position.

2. The stamping die loading and unloading device for a press according to claim 1, characterized in that, The shifting assembly comprises a swinging drive assembly and a shifting drive assembly, wherein the swinging drive assembly comprises a driving member, a crank shaft (105), a driving gear (106) and a first connecting rod (104), wherein the end of the swinging rod (103) away from the swinging end is rotatably connected to the base (101) via a limiting shaft (102), and the base (101) is slidably arranged on the workbench (2), and the lower end of the crank shaft (105) is rotatably connected to the base (101), and the crank portion of the crank shaft (105) is rotatably connected to the base (101). A first connecting rod (104) is rotatably connected to the crankshaft (105), and one end of the first connecting rod (104) away from the crankshaft (105) is rotatably connected to the rocker arm (103), wherein the crankshaft (105) and the rocker arm (103) are correspondingly arranged, and the upper ends of the two crankshafts (105) are respectively fixedly connected to driving gears (106), and the two driving gears (106) are meshed with each other, and the input end of one of the crankshafts (105) is transmission-connected to a driving member, and the driving member is mounted on the base (101) through a cantilever; The output end of the crankshaft (105) is also connected to the input end of the shift drive assembly in a transmission manner. When the rocker arm (103) swings relative to each other under the drive of the driving member, the base (101) and the workbench (2) are relatively stationary. When the rocker arm (103) swings in opposite directions under the continued drive of the driving member, the shift drive assembly drives the base (101) to drive the rocker arm (103) to move along the shift direction toward the direction close to the stamping position.

3. The stamping die loading and unloading device for a press according to claim 2, characterized in that, The shift driving assembly includes a dial (113), a turntable (112), a limit post (111), a Geneva wheel (109), a driven gear (107) and a rack (108). A dial (113) is also fixedly connected to the crankshaft (105). A turntable (112) and a limit post (111) are fixedly connected to the side of the dial (113) away from the driving gear (106). The limit post (111) is located outside the turntable (112) and is arranged corresponding to the arc notch of the turntable (112). A Geneva wheel (109) is arranged on one side of the turntable (112). A limit groove (110) is formed in the Geneva wheel (109). The limit post (111) is in transmission cooperation with the Geneva wheel (109) through the limit groove (110). A driven gear (107) is fixedly connected to the output shaft of the Geneva wheel (109). The driven gear (107) is in meshing transmission with a rack (108). A support (114) is fixedly connected to the side end of the rack (108). The support (114) is fixedly connected to the workbench (2). Among them, two sets of shift driving assemblies are provided, and the two sets of shift driving assemblies are arranged corresponding to the swing rods (103).

4. The stamping die loading and unloading device for a press according to claim 3, characterized in that, A support base (22) is fixedly arranged on the workbench (2). A slide rail (221) is formed in the support base (22). The extending direction of the slide rail (221) is the same as the shift direction of the die set (3). A slider (23) is fixedly connected to the side of the base (101) facing the support base (22). The slider (23) is slidably connected to the support base (22) through the slide rail (221).

5. A stamping die loading and unloading device for a press according to claim 4, characterized in that, The unloading assembly (7) includes a telescopic displacement member and a push plate. The output end of the telescopic displacement member is fixedly connected to the push plate.

6. The stamping die loading and unloading device for a press according to claim 5, characterized in that, A limit assembly (6) is arranged on the support base (22). The limit assembly (6) is in transmission connection with the slider (23). When the paired swing rods (103) swing relatively, the limit assembly (6) is used to prevent the slider (23) from moving away from the stamping position along the shift direction.

7. The stamping die loading and unloading device for a press according to claim 6, characterized in that, The limiting component (6) includes a screw rod (61), a sliding rod (62), a second connecting rod (63), a sleeve (64), a spring (65) and a limiting rod (66). There are two sets of the limiting components (6), and the two sets of limiting components (6) are symmetrically arranged on both sides of the slide rail (221). The screw rod (61) is rotationally connected to the support seat (22) in a threaded manner, and the knob of the screw rod (61) is located outside the support seat (22). The output end of the screw rod (61) is located inside the support seat (22) and is rotationally connected to the sliding rod (62). The sliding rod (62) is slidably connected to the support seat (22). A second connecting rod (63) is rotationally connected to the side of the sliding rod (62) located in the inner cavity of the support seat (22). One end of the second connecting rod (63) away from the sliding rod (62) is rotationally connected to a sleeve (64). A limiting rod (66) is slidably connected inside the sleeve (64). A spring (65) is arranged inside the sleeve (64). One end of the spring (65) is fixedly connected to the limiting rod (66), and the other end of the spring (65) is fixedly connected to the limiting rod (66). Among them, the limiting rod (66) and the sleeve (64) are respectively slidably connected to the support seat (22); A wedge surface groove (231) is formed on the side of the slider (23). The side of the wedge surface groove (231) close to the stamping position is a stepped surface, and the side of the wedge surface groove (231) away from the stamping position is an inclined surface.

8. A stamping die loading and unloading device for a press according to claim 7, characterized in that, The mold set (3) further includes an upper mold base (34), a moving mold (33) and a fixed mold (32). The fixed mold (32) is fixedly arranged in the inner cavity of the lower mold base (31). The moving mold (33) is fixedly arranged in the inner cavity of the upper mold base (34). The moving mold (33) and the fixed mold (32) are arranged correspondingly. When the mold set (3) is located at the stamping position, the upper mold base (34) is fixedly arranged on the stamping head (41) of the stamping mechanism (4) through the mounting frame (42), and the upper mold base (34) has a circumferential side surface that fits with the circumferential fitting surface of the mounting frame (42).

9. The stamping die loading and unloading device for a press according to claim 8, characterized in that When the mold set (3) is located at the replacement position, the overall thickness dimension value of the mold set (3) is smaller than the distance value between the rack (108) and the support seat (22).

10. The stamping die loading and unloading device for a press according to claim 9, characterized in that, A rolling groove is formed on the support seat (22), and a rolling rod (21) is rotationally connected in the rolling groove. The axial direction of the rolling rod (21) is perpendicular to the displacement direction of the mold set (3). Among them, the uppermost position of the rolling rod (21) protrudes to the upper surface position of the support seat (22).

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