Stamping die assembling and disassembling device for press machine

Abstract

The invention discloses a stamping die assembling and disassembling device for a press machine, and relates to the technical field of die stamping equipment.The die assembling and disassembling device comprises a workbench and an assembling and disassembling mechanism, the assembling and disassembling mechanism comprises a shifting assembly and swing rods, and the swing rods arranged in pairs are symmetrically arranged in the shifting direction of a die set; the output end of the shifting assembly is in transmission connection with the swing rod. The side face of the swing end of the swing rod is in friction abutting fit with the circumferential side face of a lower die base in the die set. When the swing rod relatively swings, the swing end of the swing rod extrudes and pushes the die set to move in the direction close to the stamping position. When the swing rods swing oppositely, the displacement assembly drives the swing rods to move in the direction close to the stamping position. The loading and unloading mechanism further comprises an unloading assembly, the unloading assembly is arranged on the workbench, the unloading assembly is located on the side, away from the swing rod, of the stamping position on the workbench, and the unloading assembly is used for shifting the die set from the stamping position to the replacement position. The die assembling and disassembling device realizes fine adjustment of the die set to the center and accurate 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 loading and unloading device for a press machine. Background Art

[0002] A press machine is a mechanical device that uses mechanical, hydraulic, or pneumatic pressure to generate pressure to form, shear, punch, press, and other processes on materials. In sheet metal stamping technology, press machines are widely used in processes such as cutting, punching, blanking, bending, riveting, and forming. They apply strong pressure to metal blanks to cause plastic deformation and fracture of the metal to form 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 needed to adjust the position of the die, which not only has low labor efficiency and high labor intensity, but more importantly, whether it is a forklift or multiple people working together to push the die, the die will be skewed after entering the stamping position of the machine tool workbench due to uneven force, and cannot meet the 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, wherein a loading and unloading mechanism is arranged on the workbench, and the loading and unloading mechanism is used to convert the die set for stamping between the stamping position and the replacement position, and the loading and unloading mechanism comprises a shift assembly and a swing rod, wherein the swing rods arranged in pairs are symmetrically arranged along the shift direction of the die set, and the output end of the shift assembly is transmission-connected with the swing rods, and under the drive of the shift assembly, the swing directions of the swing rods arranged in pairs are opposite, and the side surface of the swing end of the swing rod is frictionally matched with the circumferential side surface of the lower die seat in the die set;

[0008] When the swing rods arranged in pairs swing relative to each other, the swing end side surfaces of the swing rods rub against the circumferential side surfaces of the lower die seat and squeeze and push the die set to move in the displacement direction toward the direction close to 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 also includes a unloading assembly, which is arranged on the workbench and located on a side of the workbench away from the swing arm at the stamping position. The unloading assembly is used to shift the mold set to be replaced from the stamping position to the replacement position.

[0011] As a further optimization scheme of the present invention, the shift assembly includes a swing drive assembly and a shift drive assembly, the swing drive assembly includes a driving member, a crank shaft, a driving gear and a first connecting rod, the end of the swing rod away from the swing end is rotatably connected to the base through a limit shaft, the base is slidably arranged on a workbench, the lower end of the crank shaft is rotatably connected to the base, the crank portion of the crank shaft is rotatably connected to the first connecting rod, and the end of the first connecting rod away from the crank shaft is rotatably connected to the swing rod, wherein the crank shaft and the swing rod are correspondingly arranged, the upper ends of the two crank shafts are respectively fixedly connected to driving gears, the two driving gears are meshed with each other, the input end of one of the crank shafts is transmission-connected to the driving member, and the driving member is mounted on the base through a cantilever;

[0012] Among them, the output end of the crank shaft is also transmission-connected with the input end of the shift drive assembly. When the rocker arm swings relative to each other under the drive of the driving member, the base and the workbench are relatively stationary; when the rocker arm swings in opposite directions under the continued drive of the driving member, the shift drive assembly drives the base to drive the rocker arm to move along the shift direction toward the direction close to the stamping position.

[0013] As a further optimization scheme of the present invention, the shift drive assembly includes a dial, a turntable, a limit column, a groove wheel, a driven gear and a rack. The crank shaft is also fixedly connected with a dial, and the side of the dial away from the driving gear is fixedly connected with a turntable and a limit column, the limit column is located on the outer side of the turntable, and the limit column is arranged corresponding to the circular arc recess of the turntable, a groove wheel is arranged on one side of the turntable, a limit groove is provided on the groove wheel, and the limit column cooperates with the groove wheel through the limit groove, a driven gear is fixedly connected to the output shaft of the groove wheel, and the driven gear is meshed with a rack, and a bracket is fixedly connected to the side end of the rack, and the bracket is fixedly connected to the workbench;

[0014] There are two groups of shift drive components, and the two groups of shift drive components are arranged corresponding to the rocker rods.

[0015] As a further optimization scheme of the present invention, a support seat is fixedly arranged on the workbench, a slide rail is provided on the support seat, the extension direction of the slide rail is consistent with the displacement direction of the mold group, and a slider is fixedly connected to the side of the base facing the support seat, and the slider is slidably connected to the support seat through the slide rail.

[0016] As a further optimization solution of the present invention, the unloading assembly includes a telescopic displacement member and a push plate, and the output end of the telescopic displacement member is fixedly connected to the push plate.

[0017] As a further optimization scheme of the present invention, a limit assembly is arranged on the support seat, and the limit assembly is transmission-connected with the slider. When the paired rocker arms swing relative to each other, the limit assembly is used to prevent the slider from moving in the direction away from the stamping position along the displacement direction.

[0018] As a further optimization scheme of the present invention, the limit assembly comprises a screw, a sliding rod, a second connecting rod, a sleeve, a spring and a limit rod, and the limit assembly is provided with two groups, and the two groups of limit assemblies are symmetrically arranged on both sides of the slide rail, the screw thread is rotatably connected to the support seat, and the knob of the screw is located outside the support seat, the output end of the screw is located in the support seat and is rotatably connected to the sliding rod, the sliding rod is slidably connected to the support seat, the side of the sliding rod located in the inner cavity of the support seat is rotatably connected to the second connecting rod, the end of the second connecting rod away from the sliding rod is rotatably connected to the sleeve, the limit rod is slidably connected in the sleeve, a spring is arranged in the sleeve, one end of the spring is fixedly connected to the limit rod, and the other end of the spring is fixedly connected to the limit rod, wherein the limit rod and the sleeve are slidably connected to the support seat respectively;

[0019] A wedge surface groove is provided on the side of the sliding block, the side of the wedge surface groove close to the stamping position is a step surface, and the side of the wedge surface groove away from the stamping position is an inclined surface.

[0020] As a further optimization scheme of the present invention, the mold group also includes an upper mold base, a movable mold and a fixed mold. The fixed mold is fixedly arranged in the inner cavity of the lower mold base, and the movable mold is fixedly arranged in the inner cavity of the upper mold base. The movable mold and the fixed mold are arranged correspondingly. When the mold group is in the stamping position, the upper mold base is fixedly arranged on the stamping head of the stamping mechanism through a mounting frame, and the upper mold base has a circumferential side surface that is in contact with the circumferential mating surface of the mounting frame.

[0021] As a further optimization solution of the present invention, when the mold set is located 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 optimization scheme of the present invention, a rolling groove is opened on the support seat, and a rolling rod is rotatably connected in the rolling groove. The axial direction of the rolling rod is perpendicular to the displacement direction of the mold group, wherein the uppermost end 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 swing rod and a discharge assembly, the old die set is shifted from a stamping position to a replacement position by means of the discharge assembly, and then the swing rods arranged in pairs are driven by the shifting assembly to make the swinging directions of the swing rods arranged in pairs opposite, the swing rods are relatively swung to make the swing rods squeeze and push the new die set located at the replacement position to move toward the direction close to the stamping position, and the driven gear and the rack are meshed and driven by the swing rods in opposite directions, so that the base drives the swing rod to move toward the direction close to the stamping position, and the distance between the base and the die set is reduced, thereby realizing periodic centering fine adjustment of the die set, and intermittent linear shifting to the stamping position, to ensure accurate positioning of the die set;

[0024] Moreover, a limit assembly is arranged 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 in a 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 set of the present invention when it is located at the stamping position;

[0028] Figure 4 The present 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 schematic diagram of the loading and unloading mechanism of the present invention;

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

[0033] Fig. 9 It is a partial cross-sectional structural schematic diagram of the limiting assembly and the sliding block of the present invention when they are located at the limiting position;

[0034] Fig.10 The present invention Fig. 9 Enlarged view of center C.

[0035] In the figure: 1. loading and unloading mechanism; 101. base; 102. limit shaft; 103. swing rod; 104. first connecting rod; 105. crank shaft; 106. driving gear; 107. driven gear; 108. rack; 109. groove wheel; 110. limit groove; 111. limit column; 112. turntable; 113. dial; 114. bracket; 115. motor; 2. workbench; 21. roller Rod; 22, support seat; 221, slide rail; 23, slider; 231, wedge groove; 3, mold set; 31, lower mold seat; 32, fixed mold; 33, movable mold; 34, upper mold seat; 4, stamping mechanism; 41, stamping head; 42, mounting frame; 6, limit assembly; 61, screw; 62, slide rod; 63, second connecting rod; 64, sleeve; 65, spring; 66, limit rod; 7, unloading assembly. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0037] In one embodiment, if Figure 1 , Figure 3 and Figure 5 As shown, the present invention provides a stamping die loading and unloading device for a press machine, comprising:

[0038] A workbench 2, on which a loading and unloading mechanism 1 is arranged, and the loading and unloading mechanism 1 is used to convert a stamping die set 3 between a stamping position and a replacement position, and the loading and unloading mechanism 1 includes a shift assembly and a swing rod 103, the swing rods 103 arranged in pairs are symmetrically arranged along the shift direction of the die set 3, the output end of the shift assembly is transmission-connected with the swing rod 103, and under the drive of the shift assembly, the swing directions of the swing rods 103 arranged in pairs are opposite, and the side surfaces of the swing ends of the swing rods 103 are frictionally engaged with the circumferential side surfaces of the lower die seat 31 in the die set 3;

[0039] 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 along the shift direction toward the direction close to the stamping position; when the paired swing rods 103 swing opposite to each other, the shift assembly drives the swing rods 103 to move along the shift direction toward the direction close to the stamping position;

[0040] The loading and unloading mechanism 1 also includes a unloading assembly 7, which is arranged on the workbench 2 and located on the side of the stamping position on the workbench 2 away from the swing rod 103. The unloading assembly 7 is used to shift the mold group 3 to be replaced from the stamping position to the replacement position.

[0041] In the above embodiment, by means of the reciprocating swing of the symmetrically arranged swing rods 103, the mold set 3 is pushed by the pair of swing rods 103 to continuously fine-tune the center position of the mold set 3, so that it is centrally distributed and intermittently moves in the direction close to the stamping position along the shifting direction, thereby ensuring that the mold set 3 will not be skewed when it is shifted to the stamping position; it should be noted that if Figure 1 As shown, the unloading assembly 7 includes a telescopic displacement member and a push plate, and the output end of the telescopic displacement member is fixedly connected to the push plate. After the stamping is completed, when a new mold group 3 needs to be replaced, the rocker arm 103 is shifted to the initial position along with the base 101. With the help of the telescopic displacement member, the push plate pushes the mold group 3 to be replaced out of the stamping position, so that it can be taken away from the workbench 2 with the help of a forklift or a crane, without the need for manual handling, thus saving manpower.

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

[0043] For example, see Figure 4 , Figure 5 and Figure 8 The shift assembly includes a swing drive assembly and a shift drive assembly, the swing drive assembly includes a driving member, a crank shaft 105, a driving gear 106 and a first connecting rod 104, the end of the swing rod 103 away from the swing end is rotatably connected to the base 101 through a limit shaft 102, the base 101 is slidably set on the workbench 2, the lower end of the crank shaft 105 is rotatably connected to the base 101, the crank portion of the crank shaft 105 is rotatably connected to the first connecting rod 104, and the end of the first connecting rod 104 away from the crank shaft 105 is rotatably connected to the swing rod 103, wherein the crank shaft 105 is correspondingly arranged with the swing rod 103, the upper ends of the two crank shafts 105 are respectively fixedly connected with driving gears 106, the two driving gears 106 are meshed with each other, and the input end of one of the crank shafts 105 is transmission-connected with a driving member, and the driving member is mounted on the base 101 through a cantilever;

[0044] For example, the driving member may be a motor 115, such as Figure 5 As shown, the motor 115 is used to drive one of the crank shafts 105 to rotate;

[0045] Among them, the output end of the crank shaft 105 is also transmission-connected to the input end of the shift drive assembly. When the paired rocker arms 103 swing relative to each other under the drive of the driving member, the base 101 and the workbench 2 are relatively stationary; when the paired rocker arms 103 swing back and forth under the continued drive of the driving member, the shift drive assembly drives the base 101 to drive the rocker arms 103 to move along the shift direction toward the direction close to the stamping position.

[0046] For example, see Figure 6 and Figure 7 , the shift drive assembly includes a dial 113, a turntable 112, a limit column 111, a groove wheel 109, a driven gear 107 and a rack 108. The crank shaft 105 is also fixedly connected with a dial 113. The side of the dial 113 away from the driving gear 106 is fixedly connected with the turntable 112 and the limit column 111. The limit column 111 is located on the outer side of the turntable 112, and the limit column 111 is arranged corresponding to the arc recess of the turntable 112. A groove wheel 109 is arranged on one side of the turntable 112. A limit groove 110 is provided on the groove wheel 109. The limit column 111 is matched with the groove wheel 109 through the limit groove 110. The output shaft of the groove wheel 109 is fixedly connected with a driven gear 107. The driven gear 107 is meshed with a rack 108. The side end of the rack 108 is fixedly connected with a bracket 114, and the bracket 114 is fixedly connected to the workbench 2;

[0047] There are two groups of shift drive components, and the two groups of shift drive components are arranged corresponding to the rocker rod 103 .

[0048] In the above embodiment, the driving member drives one of the crank shafts 105, so that the two driving gears 106 mesh with each other, so that the rotation directions of the crank shaft 105 are opposite. Figure 7 Taking the top view as an example, the driving gear 106 on the right rotates clockwise, so that the crank portion of the crank shaft 105 drives the swing rod 103 to swing relatively through the first connecting rod 104, thereby pushing the die set 3 placed in the replacement position toward the direction close to the stamping position. In this process, Figure 6 As shown, the turntable 112 constrains the groove wheel 109 to be unable to rotate, so that the driven gear 107 and the rack 108 stop meshing and transmission, thereby ensuring that when the mold set 3 is shifted, the base 101 is stationary relative to the workbench 2 until the swing rod 103 swings relatively to the maximum angular displacement, as shown in FIG. Figure 8As shown, the lower die base 31 in the die set 3 is shifted from the dotted line position to the solid line position; and under the continued rotation of the crank shaft 105, when the rocker arm 103 is driven to swing in opposite directions through the first connecting rod 104, at this time, the groove wheel 109 is rotated by means of the transmission cooperation between the limit column 111 and the limit groove 110, so that the driven gear 107 moves toward the direction close to the stamping position under the meshing constraint of the rack 108, that is, the base 101 drives the rocker arm 103 to move toward the direction close to the stamping position, and the above-mentioned actions are repeated to realize continuous fine-tuning of the center position of the die set 3, so that it is distributed in the center, and intermittently moves along the shifting direction toward the stamping position, thereby ensuring that the die set 3 will not be skewed when it is shifted to the stamping position.

[0049] For example, see Figure 1 and Figure 4 The workbench 2 is fixedly provided with a support seat 22, and a slide rail 221 is provided on the support seat 22. The extension direction of the slide rail 221 is consistent with the displacement direction of the mold set 3. The base 101 is fixedly connected with a slider 23 on the side facing the support seat 22. The slider 23 is slidably connected to the support seat 22 through the slide rail 221. Therefore, when the base 101 is intermittently moving, the base 101 drives the swing rod 103 to move accurately in a straight line with the help of the sliding constraint of the slider 23 and the slide rail 221, that is, the centering correction accuracy of the mold set 3 is guaranteed.

[0050] In one embodiment, continue to refer to Figure 4 and Fig. 9 The support seat 22 is provided with a limit assembly 6, which 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 in the direction away from the stamping position along the displacement direction. When the paired swing rods 103 swing relatively, in addition to the transmission constraint of the turntable 112 on the groove wheel 109, the limit assembly 6 is used to further clamp and limit the slider 23, thereby avoiding the tendency of the slider 23 to move backward away from the stamping position due to the squeezing force of the swing rod 103 and the lower die seat 31.

[0051] For example, see Fig. 9The limiting assembly 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. The limiting assembly 6 is provided with two groups, and the two groups of limiting assemblies 6 are symmetrically arranged on both sides of the slide rail 221. The screw rod 61 is threadedly rotatably connected to the support seat 22, 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 in the support seat 22 and is rotatably connected to the sliding rod 62. The sliding rod 62 is slidably connected to the support seat 22. The side of the sliding rod 62 located in the inner cavity of the support seat 22 is rotatably connected with the second connecting rod 63. The end of the second connecting rod 63 away from the sliding rod 62 is rotatably connected with the sleeve 64. The limiting rod 66 is slidably connected in the sleeve 64. A spring 65 is arranged in 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. The limiting rod 66 and the sleeve 64 are respectively slidably connected to the support seat 22.

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

[0053] It should be noted that after the mold set 3 is placed in the replacement position, the screw 61 is tightened to make the limit rod 66 protrude into the slide rail 221. At this time, when the slider 23 moves forward, the inclined surface of the front end of the slider 23 presses the limit rod 66, so that the spring 65 is compressed. After the slider 23 is displaced, under the action of the elastic force, the limit rod 66 moves outward to the wedge groove 231, and the limit rod 66 abuts against the step surface of the wedge groove 231, thereby preventing the slider 23 from retreating, that is, the slider 23 is in the limit position. , and when the slider 23 moves forward for the next time, the inclined surface of the wedge groove 231 is squeezed with the convex surface of the limit rod 66, so that after the slider 23 finishes a new forward movement, the limit rod 66 originally located in the wedge groove 231 is now located at the rear position of the slider 23; when the displacement of the mold group 3 is completed, it is only necessary to screw the screw 61 outward so that the slide rod 62 passes through the second connecting rod 63, and the limit rod 66 is moved back into the support seat 22, that is, the limit end of the limit rod 66 withdraws from the slide rail 221, so that the slider 23 can move backward without obstruction.

[0054] It should be noted that, please continue to refer to Figure 3 The die set 3 further includes an upper die seat 34, a movable die 33 and a fixed die 32. The fixed die 32 is fixedly arranged in the inner cavity of the lower die seat 31, and the movable die 33 is fixedly arranged in the inner cavity of the upper die seat 34. The movable die 33 is arranged corresponding to the fixed die 32. When the die set 3 is in the stamping position, as shown in FIG. Figure 3As shown, the lower die seat 31 is fixedly limited on the support seat 22, and the upper die seat 34 is fixedly arranged on the punch head 41 of the punch mechanism 4 through the mounting frame 42, and the upper die seat 34 has a circumferential side surface that fits with the circumferential fitting surface of the mounting frame 42, so that after the die set 3 is shifted to the punching position, there is no need to adjust the circumferential position of the die set 3, and only the upper die seat 34 needs to be clamped and fixed by the mounting frame 42 to ensure that the movable die 33 on the upper die seat 34 and the fixed die 32 on the lower die seat 31 are accurately connected. Among them, the punching drive member in the punch mechanism 4 drives the punch head 41 to move up and down, so that the mounting frame 42 drives the upper die seat 34 to move up and down, and the punching drive member can be a hydraulic telescopic member, an electrical telescopic member, etc., which is not limited here.

[0055] The side of the mounting frame 42 is slidably connected to the side of the bracket of the punching mechanism 4 , so that the mounting frame 42 drives the upper die seat 34 to stably perform the up and down punching work along with the punching head 41 .

[0056] It should be noted that, after the moving distance is preset, the mold set 3 located at the replacement position is shifted to the stamping position after multiple intermittent shifts, and the mold set 3 is located at the stamping position, and no additional fine-tuning along the shifting direction is required at the stamping position. For different stamping dies, the structural dimensions of the lower die base 31 are the same, except that the internal fixed die 32 and the movable die 33 are selected according to the process shape requirements of the product preparation, and each time the loading and unloading of the mold set 3 is completed, the base 101 will be reset to the preset position, so as to ensure that after a limited number of intermittent shifts, it can be ensured that the mold set 3 can be accurately shifted to the stamping position each time.

[0057] It should be further explained that when the mold set 3 is at the replacement position, the overall thickness of the mold set 3 is smaller than the distance between the rack 108 and the support seat 22. This makes it easier for a forklift to carry the mold set 3 from the side to the workbench 2 without interference from the rack 108.

[0058] For example, see Figure 1 , Figure 2 and Figure 4 The support seat 22 is provided with a rolling groove, in which a rolling rod 21 is rotatably connected, and the axis direction of the rolling rod 21 is perpendicular to the displacement direction of the mold set 3, wherein the uppermost end of the rolling rod 21 protrudes to the upper surface of the support seat 22. Thus, when the lower mold seat 31 is displaced, the friction between the lower mold seat 31 and the support seat 22 is reduced by the rolling of the rolling rod 21, so as to facilitate displacement.

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

[0060] The motor 115 is started, and under the meshing transmission of the paired driving gears 106, the two crank shafts 105 are respectively driven by the first connecting rod 104 to swing the swing rods 103. Under the relative swinging of the paired swing rods 103, the swinging ends of the swing rods 103 squeeze the lower die base 31 and push the lower die base 31 forward. In this process, under the constraints of the rotating disk 112 and the groove wheel 109, the driven gear 107 and the rack 108 stop meshing transmission. Then, after the swing rods 103 swing to the maximum angular displacement, as shown in FIG. Figure 8 As shown, under the continuous driving of the crank shaft 105, when the paired swing rods 103 swing in opposite directions, the dial 113 drives the limiting column 111 to rotate, and under the transmission of the limiting column 111 and the limiting groove 110 on the groove wheel 109, the driven gear 107 and the rack 108 continue to mesh and transmit, so that the base 101 drives the slider 23 to slide along the slide rail 221, and the above actions are repeated to realize the continuous fine adjustment of the center position of the mold group 3, so that it is distributed in the center, and intermittently moves along the shifting direction toward the direction close to the stamping position, so as to ensure that the mold group 3 will not be skewed when it is shifted to the stamping position;

[0061] Furthermore, when the slider 23 moves forward, the limiting rod 66 compresses the spring 65 by means of the compression of the inclined surface at the front end of the slider 23 and the limiting rod 66, so that the limiting rod 66 retreats into the support seat 22, and when the slider 23 completes one movement, under the elastic force of the spring 65, the limiting rod 66 extends into the wedge groove 231 and abuts against the step surface of the wedge groove 231, ensuring that when the swing rod 103 performs the next cycle of relative swing, the slider 23 is prevented from moving backward, ensuring the squeezing and pushing effect of the swing rod 103 on the lower die seat 31;

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

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

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

2. A stamping die loading and unloading device for a press machine according to claim 1, characterized in that: The shifting assembly comprises a swinging drive assembly and a shifting drive assembly, the swinging drive assembly comprising a driving member, a crank shaft (105), a driving gear (106) and a first connecting rod (104), the end of the swinging rod (103) away from the swinging end is rotatably connected to the base (101) via a limit shaft (102), the base (101) is slidably arranged on the workbench (2), 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). The crankshaft (105) is rotatably connected to a first connecting rod (104), and one end of the first connecting rod (104) away from the crankshaft (105) is rotatably connected to the swing rod (103), wherein the crankshaft (105) and the swing rod (103) are arranged correspondingly, 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 swing arm (103) swings relative to each other under the drive of the drive member, the base (101) and the workbench (2) are relatively stationary. When the swing arm (103) swings in opposite directions under the continued drive of the drive member, the shift drive assembly drives the base (101) to drive the swing arm (103) to move along the shift direction toward a direction close to the stamping position.

3. A stamping die loading and unloading device for a press machine according to claim 2, characterized in that: The shift drive assembly comprises a dial (113), a rotating disk (112), a limiting column (111), a groove wheel (109), a driven gear (107) and a rack (108); the crank shaft (105) is also fixedly connected to the dial (113); a side of the dial (113) away from the driving gear (106) is fixedly connected to the rotating disk (112) and the limiting column (111); the limiting column (111) is located outside the rotating disk (112), and a circular arc notch between the limiting column (111) and the rotating disk (112) is formed. Correspondingly, a groove wheel (109) is provided on one side of the rotating disk (112), a limiting groove (110) is provided on the groove wheel (109), the limiting column (111) is matched with the groove wheel (109) through the limiting groove (110), a driven gear (107) is fixedly connected to the output shaft of the groove wheel (109), the driven gear (107) is meshed with a rack (108), a side end of the rack (108) is fixedly connected to a bracket (114), and the bracket (114) is fixedly connected to the workbench (2); There are two groups of shift drive components, and the two groups of shift drive components are arranged corresponding to the rocker rod (103).

4. A stamping die loading and unloading device for a press machine according to claim 3, characterized in that: A support seat (22) is fixedly arranged on the workbench (2), a slide rail (221) is provided on the support seat (22), the extension direction of the slide rail (221) is consistent with the displacement direction of the mold assembly (3), and a slide block (23) is fixedly connected to the side of the base (101) facing the support seat (22), and the slide block (23) is slidably connected to the support seat (22) via the slide rail (221).

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

6. A stamping die loading and unloading device for a press machine according to claim 5, characterized in that: A limit assembly (6) is provided on the support seat (22), and 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 in a direction away from the stamping position along the displacement direction.

7. A stamping die loading and unloading device for a press machine according to claim 6, characterized in that: The limiting assembly (6) comprises a screw rod (61), a slide rod (62), a second connecting rod (63), a sleeve (64), a spring (65) and a limiting rod (66). The limiting assembly (6) is provided with two groups, and the two groups of limiting assemblies (6) are symmetrically arranged on both sides of the slide rail (221). The screw rod (61) is threadedly rotatably connected to the support seat (22), 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 rotatably connected to the slide rod (62). The slide rod (62) and the support seat (22) are connected to each other. ) is slidably connected, the side of the slide rod (62) located in the inner cavity of the support seat (22) is rotatably connected to the second connecting rod (63), the end of the second connecting rod (63) away from the slide rod (62) is rotatably connected to the sleeve (64), the sleeve (64) is slidably connected to a limit rod (66), a spring (65) is arranged in the sleeve (64), one end of the spring (65) is fixedly connected to the limit rod (66), and the other end of the spring (65) is fixedly connected to the limit rod (66), wherein the limit rod (66) and the sleeve (64) are respectively slidably connected to the support seat (22); A wedge surface groove (231) is provided on the side of the slide block (23); a side of the wedge surface groove (231) close to the punching position is a step surface, and a side of the wedge surface groove (231) away from the punching position is an inclined surface.

8. A stamping die loading and unloading device for a press machine according to claim 7, characterized in that: The die set (3) further comprises an upper die seat (34), a movable die (33) and a fixed die (32); the fixed die (32) is fixedly arranged in the inner cavity of the lower die seat (31); the movable die (33) is fixedly arranged in the inner cavity of the upper die seat (34); the movable die (33) and the fixed die (32) are arranged correspondingly; when the die set (3) is located at the punching position, the upper die seat (34) is fixedly arranged on the punching head (41) of the punching mechanism (4) via a mounting frame (42); and the upper die seat (34) has a circumferential side surface that is in contact with a circumferential contact surface of the mounting frame (42).

9. A stamping die loading and unloading device for a press machine 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. A stamping die loading and unloading device for a press machine according to claim 9, characterized in that: The support seat (22) is provided with a rolling groove, in which a rolling rod (21) is rotatably connected, and the axis direction of the rolling rod (21) is perpendicular to the displacement direction of the mold assembly (3), wherein the uppermost end of the rolling rod (21) protrudes to the upper surface of the support seat (22).

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