Stamping device for small hardware

Abstract

The invention discloses a small hardware stamping device, and particularly relates to the technical field of hardware machining, the small hardware stamping device comprises a rack, a first supporting frame is mounted on the outer side of the top of the rack, a lower die structure is mounted in the center of the first supporting frame, and a hydraulic cylinder is mounted in the center of the top of a second supporting frame; an upper die structure is installed at the bottom of a piston rod at the output end of the hydraulic cylinder, containing grooves are formed in the two sides of the front side of the first supporting frame, and a clamping device is installed in each containing groove. According to the stamping device for the small hardware, the clamping device is linked through a guide rope and the like, a metal sheet is accurately clamped and is adaptively attached along with the deformation of the metal sheet, and the stamping precision is ensured; the L-shaped clamping blocks can prevent finished products from being lifted along with the upper mold, the demolding problem is solved, when the upper mold is reset, the driving mechanism drives the material moving mechanism to automatically transfer the finished products and supplement new materials, continuous production is achieved in combination with the discharging groove, and efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware processing, in particular to a punching device for small hardware. Background Art

[0002] Hardware refers to tools made by processing and casting metals such as gold, silver, copper, iron, and tin, which are used to fix and process things.

[0003] Hardware parts come in various shapes. In order to ensure processing quality and speed, stamping devices are needed to assist production during the production process. Stamping processing uses the power of conventional or special stamping equipment to directly subject the sheet metal to deformation force in the mold and deform it, thereby obtaining product parts with a certain shape, size and performance.

[0004] Chinese patent document CN110142326 A discloses a stamping device for sheet metal processing, comprising a workbench and a hydraulic cylinder. A support column is fixed to the workbench, and a first horizontally disposed slide is provided on the upper sidewall of the support column. A movable seat is provided on the first slide, and the first slide extends through the movable seat and is slidably connected thereto. A hydraulic cylinder is mounted on the movable seat, and a stamping rod is connected to the output end of the hydraulic cylinder. A forming punch is connected to the bottom end of the stamping rod. A forming die that cooperates with the forming punch is provided on the workbench. The sheet metal processing stamping device also includes a drive mechanism for driving the movable seat to move laterally. The sheet metal processing stamping device uses a drive motor to drive gears to rotate, thereby driving the hydraulic cylinder, stamping rod, and forming punch to move laterally. This allows stamping of different positions of a sheet metal placed on the forming die without requiring a worker to move the sheet metal, making it easy to use.

[0005] The above patent documents still have the following defects during implementation:

[0006] Although the above patent document can complete the stamping operation during implementation, it is well known that during the stamping process of sheet metal sheets, since the side walls of the mold cavity used are vertical, after the metal is deformed by stamping, the metal material will recover due to elasticity after being formed, and then hold the mold tightly, making it difficult to remove it. Summary of the Invention

[0007] The main purpose of the present invention is to provide a punching device for small hardware parts, which can effectively solve the problems mentioned above.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] A stamping device for small hardware parts includes a stand, a blanking chute is installed at the center of the top of the stand, a material guide tube is installed on the top of the stand below the blanking chute, a support frame 1 is installed on the outside of the top of the stand, a lower mold structure is installed at the center of the support frame 1, a support frame 2 is installed on the front side of the top of the support frame 1, a hydraulic cylinder is installed at the center of the top of the support frame 2, an upper mold structure is installed at the bottom of the piston rod of the output end of the hydraulic cylinder, placement grooves are provided on both sides of the front side of the support frame 1, and a clamping device is installed in each placement groove.

[0010] Preferably, the clamping device includes a fixed pulley 1 and a fixed pulley 2 respectively installed on the top side and the bottom side of the support frame 2, and a guide rope is wrapped around the outside of the fixed pulley 1 and the fixed pulley 2. One side of the rope end of the guide rope is installed on the top of the upper mold structure, and the other side is installed with a guide mechanism. The guide mechanism is installed on the inner side of the support frame 1 and is located on the same vertical plane as the fixed pulley 2.

[0011] Preferably, the guiding mechanism includes a toggling rod rotating on one side of the support frame 2, the other side of the guide rope is fixed on the top of the toggling rod, an axis rod is installed on the surface of the toggling rod, and a slip ring is provided on the outer surface of the axis rod, a guide rod 1 is fixed on the side of the slip ring close to the lower mold structure, and a buffer structure sliding on the top of the support frame 2 is provided on the side of the guide rod 1 away from the slip ring.

[0012] Preferably, the buffer structure includes a sliding shell fixed to one end of the guide rod, and the sliding shell slides on the top of the support frame 2, a spring 1 is provided inside the sliding shell, a push plate is fixed to the other end of the spring 1, and the push plate is provided in the inner cavity of the sliding shell, and a guide rod 2 is fixed on the side of the push plate close to the lower mold structure, which extends through the sliding shell to the outside, and an L-shaped clamp is installed on the end of the guide rod 2 away from the sliding shell, and a fixed seat fixed to the top of the support frame 1 slides on the outer surface of the sliding shell.

[0013] Preferably, the vertical portion of the L-shaped clamping block close to the lower mold structure has a plurality of teeth.

[0014] Preferably, the upper mold structure includes a fixed plate 1 installed at the bottom of the hydraulic cylinder piston rod, and one side of the two guide ropes are respectively installed on the left and right sides of the top of the fixed plate 1, and the upper convex mold is installed on the bottom of the fixed plate 1 by bolts in a removable form. The left and right sides of the fixed plate 1 are provided with guide rods 3, and the bottoms of the two guide rods 3 are both installed with pressing blocks. Two supporting plates are installed on the rear side of the fixed plate 1, and a spring 2 is commonly provided between the top of the outer surface of the two guide rods 3 and the fixed plate 1.

[0015] Preferably, the lower mold structure includes a fixed square ring, and a material shifting mechanism is installed on the inner surface of the fixed square ring, and driving mechanisms are installed in the gaps on the left and right sides of the fixed square ring and the material shifting mechanism.

[0016] Preferably, the material transfer mechanism includes two main shafts rotating on the inner surface of a fixed square ring, polygonal rollers are installed on the surfaces of the two main shafts, and a number of metal transmission seats are commonly provided on the outer surfaces of the two polygonal rollers, and the adjacent two metal transmission seats are connected by hinges, and each surface of the metal transmission seat is a concave mold installed in a detachable form by bolts.

[0017] Preferably, the driving mechanism includes a gear fixed to the surface of the main shaft through a one-way bearing, and a rack meshing with the surface of the gear, a spring four is installed at the bottom of the rack, an L-shaped fixing plate fixed to one side of the bottom of the fixed square ring is installed at the bottom of the spring four, and a support plate for limiting the rack is installed in the middle of the L-shaped fixing plate.

[0018] Preferably, the top of the rack is cylindrical and slides inside the supporting piece.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. After the designed stamping is completed, the horizontal part of the L-shaped clamp remains on the top of the finished product. When the upper mold is lifted, it can prevent the finished product from being lifted synchronously with the upper convex mold, realizing the automatic separation of the finished product and the upper mold, avoiding the problem of "the finished product clinging to the upper mold" in traditional molds; during the withdrawal of the upper mold, the fitting relationship between the finished product and the lower concave mold will naturally loosen, solving the core pain point of "the metal clings to the mold and is difficult to remove after forming."

[0021] 2. The device has a designed buffer structure with a spring that can expand and contract synchronously with the stamping deformation of the metal sheet (thickening in the vertical direction and contracting in the horizontal direction), pushing the L-shaped clamp to always keep close to the metal sheet, avoiding the loosening of the metal sheet during the deformation process, and reducing problems such as product cracking and wrinkling caused by uneven force.

[0022] 3. The clamping device in this device clamps the metal sheet in two directions before stamping through the linkage structure of the guiding rope, the toggle rod and the L-shaped clamping block. The teeth of the vertical part of the L-shaped clamping block can enhance the friction with the metal sheet, and can firmly fix the metal transmission seat during the stamping process to prevent it from being displaced by the impact force, ensuring the precise alignment of the upper convex mold and the lower concave mold, and further ensuring the consistency of the stamping size. The horizontal part of the L-shaped clamping block covers the top of the metal sheet. Combined with the adaptive elastic force of the spring in the buffer structure, it can always keep the metal sheet centered directly above the lower concave mold, avoiding dimensional deviation or shape defects caused by the offset of the metal sheet during stamping.

[0023] 4、The device is driven by the gear, rack and one-way bearing, when the upper die resets, the rack is driven by the supporting piece to rise, the main shaft rotates counterclockwise, and then the lower concave die is driven to move as a whole through the polygonal shaft roller and the metal transmission seat: the finished product is moved backward, and the new metal sheet is accurately transported to the lower side of the upper die, realizing the continuous automatic circulation of "stamping-removing material-feeding".

[0024] 5、The clamping, stamping, demolding and material moving actions are completed through the single power source linkage of the hydraulic cylinder (the upper die moves downward to drive clamping, and the upper die resets to drive material moving), each link is seamlessly connected, the process interval time is reduced, and the processing quantity per unit time is improved. BRIEF DESCRIPTION OF DRAWINGS

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

[0026] Figure 2 It is another view of the overall structure schematic diagram of the present application;

[0027] Figure 3 It is the local structure schematic diagram of the present application;

[0028] Figure 4 It is the overall structure schematic diagram of the clamping device of the present application;

[0029] Figure 5 It is the overall structure schematic diagram of the present application; Figure 4 It is the enlarged schematic diagram of A in the present application;

[0030] Figure 6 It is the overall structure schematic diagram of the lower die structure and the upper die structure of the present application;

[0031] Figure 7 It is the overall structure schematic diagram of the upper die structure and the material moving mechanism of the present application;

[0032] Figure 8 It is another view of the overall structure schematic diagram of the upper die structure and the material moving mechanism of the present application;

[0033] Figure 9 It is the overall structure schematic diagram of the present application; Figure 7 It is the enlarged schematic diagram of B in the present application;

[0034] Figure 10 It is the overall structure schematic diagram of the present application; Figure 8 It is the enlarged schematic diagram of C in the present application;

[0035] Figure 11 It is the local schematic diagram of the upper die structure of the present application.

[0036] In the figure: 1. gantry; 2. chute; 3. guide tube; 4. support frame 1; 5. support frame 2; 6. hydraulic cylinder; 7. clamping device; 71. fixed pulley 1; 72. fixed pulley 2; 73. guide rope; 74. guide mechanism; 741. toggle lever; 742. slip ring; 743. guide lever 1; 744. buffer structure; 7441. sliding housing; 7442. spring 1; 7443. fixed seat; 7444. push plate; 7445. guide lever 2; 7446. L-shaped clamping block; 8. Lower mold structure; 81. Fixed square ring; 82. Material transfer mechanism; 821. Main shaft; 822. Polygonal shaft roller; 823. Metal transmission seat; 824. Lower concave mold; 83. Driving mechanism; 831. Gear; 832. Rack; 833. L-shaped fixed plate; 834. Support plate; 835. Spring four; 9. Upper mold structure; 91. Fixed plate one; 92. Upper convex mold; 93. Guide rod three; 94. Pressing block; 95. Spring two; 96. Support plate. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0038] Before implementing this case, material preparation is required. The raw material sheet metal sheet must be divided into several smaller sheet metal sheets. The size of the metal sheet must be larger than the size of the concave mold 824 in this case, and a margin must be reserved to facilitate clamping by the L-shaped clamp block 7446 in this case and to facilitate the subsequent trimming of the stamped hardware.

[0039] Example 1, as Figure 1 、 Figure 2 and Figure 3 As shown, a stamping device for small hardware parts includes a stand 1, a blanking chute 2 is installed at the center of the top of the stand 1, a material guide tube 3 is installed on the top of the stand 1 below the blanking chute 2, a support frame 4 is installed on the outside of the top of the stand 1, a lower mold structure 8 is installed at the center of the support frame 4, a support frame 2 5 is installed on the front side of the top of the support frame 4, a hydraulic cylinder 6 is installed at the center of the top of the support frame 2 5, an upper mold structure 9 is installed at the bottom of the piston rod of the output end of the hydraulic cylinder 6, and there are placement grooves on both sides of the front side of the support frame 4, and a clamping device 7 is installed in each placement groove.

[0040] During the implementation of this embodiment, the divided metal sheets need to be placed in sequence on the upper side of the lower mold structure 8. As the lower mold structure 8 operates, the metal sheets are gradually placed, and the hydraulic cylinder 6 is turned on. During the operation of the hydraulic cylinder 6, the two clamping devices 7 are first driven to clamp the metal sheets. As the piston rod of the hydraulic cylinder 6 continues to move downward, the upper mold structure 9 first limits the lower mold structure 8 to prevent the lower mold structure 8 from operating again. Then, the upper mold structure 9 performs a stamping operation on the metal sheet inside the lower mold structure 8.

[0041] After the current stamping action is completed, the hydraulic cylinder 6 runs in the reverse direction, the upper mold structure 9 starts to reset, driving the two clamping devices 7 to return to the initial position, releasing the constraints on the stamped product, and driving the lower mold structure 8 to run, moving the finished hardware backward, and the subsequent metal sheets move back to the bottom of the upper mold structure 9 to continue the subsequent stamping operation.

[0042] Specifically, in order to achieve the purpose of clamping and limiting the metal sheet during the stamping process, refer to Figure 4 In this embodiment, the clamping device 7 includes a fixed pulley 71 and a fixed pulley 72 respectively mounted on the top side and the bottom side of the support frame 5. A guide rope 73 is wound around the outer sides of the fixed pulley 71 and the fixed pulley 72. One end of the guide rope 73 is mounted on the top of the upper mold structure 9, and the other end is mounted with a guide mechanism 74. The guide mechanism 74 is mounted on one side of the interior of the support frame 4 and is located on the same vertical plane as the fixed pulley 72.

[0043] In this embodiment, when the upper mold structure 9 moves downward, it can drag the guide rope 73 to move under the fixed pulley 1 71 and the fixed pulley 2 72 in the steering direction. The guide rope 73 can drag the guide mechanism 74 to rotate in the direction of the lower mold structure 8. The metal sheet is clamped by the guide mechanism 74 to ensure that the metal sheet is in the middle of the lower mold structure 8, preventing it from being offset and ensuring the stamping quality.

[0044] Furthermore, in order to achieve the purpose of the above-mentioned guide mechanism 74 to clamp the metal sheet and ensure the stamping quality, refer to Figure 4 and Figure 5 In this embodiment, the guide mechanism 74 includes a toggle rod 741 that rotates on one side of the support frame 5. The other end of the guide rope 73 is fixed to the top of the toggle rod 741. A shaft is installed on the surface of the toggle rod 741, and a slip ring 742 is provided on the outer surface of the shaft. A guide rod 1 743 is fixed on the side of the slip ring 742 close to the lower mold structure 8. A buffer structure 744 is provided on the side of the guide rod 1 743 away from the slip ring 742, which slides on the top of the support frame 5.

[0045] For further information, see Figure 4 and Figure 5In this embodiment, the buffer structure 744 includes a sliding shell 7441 fixed to one end of the guide rod 1 743, and the sliding shell 7441 slides on the top of the support frame 2 5. A spring 1 7442 is provided inside the sliding shell 7441, and a push plate 7444 is fixed to the other end of the spring 1 7442. The push plate 7444 is provided in the inner cavity of the sliding shell 7441. A guide rod 2 7445 is fixed on the side of the push plate 7444 close to the lower mold structure 8, which extends through the sliding shell 7441 to the outside. An L-shaped clamp 7446 is installed on the end of the guide rod 2 7445 away from the sliding shell 7441. A fixing seat 7443 fixed to the top of the support frame 4 slides on the outer surface of the sliding shell 7441.

[0046] In this case, when the toggle rod 741 is pulled by the guide rope 73, the guide mechanism 74 rotates with the rotation axis at its bottom as the center point, and the shaft on its surface drags the slip ring 742 and the guide rod 1 743 toward the lower mold structure 8. At this time, the guide rod 1 743 squeezes the sliding housing 7441, driving the L-shaped clamp 7446 to contact the metal sheet. At this time, the horizontal part of the L-shaped clamp 7446 is located above the metal sheet. The vertical and horizontal parts of the two L-shaped clamps 7446 jointly fix the metal sheet, ensuring that the position of the metal sheet is centered on the lower mold structure 8, so that the metal sheet is facing the upper mold structure 9, thereby improving the quality of the finished hardware.

[0047] Secondly, when the guide rod 1 743 pushes the sliding housing 7441 to move, after the vertical portion of the L-shaped clamp 7446 contacts the metal sheet, the upper mold structure 9 is still moving downward to continue the stamping operation, and the sliding housing 7441 will continue to be pushed by the guide rod 1 743. Since the L-shaped clamp 7446 no longer moves at this time, the movement of the sliding housing 7441 will be converted into elastic potential energy of the spring 1 7442 for storage. During this process, the guide rod 2 7445 will push the push plate 7444 to continue to slide into the inner cavity of the sliding housing 7441.

[0048] As the upper mold structure 9 is stamping downward, the metal sheet will gradually form a finished product. The flat metal sheet will gradually deform, and the metal sheet will gradually thicken vertically and shrink inward horizontally. At this time, the elastic potential energy stored in the spring 1 7442 during compression will gradually be released, pushing the L-shaped clamp 7446 to always adhere to the metal sheet until the metal sheet is stamped by the upper mold structure 9 with the assistance of the lower mold structure 8 to form a finished product.

[0049] After the stamping is completed, the upper mold structure 9 leaves the lower mold structure 8 under the drive of the hydraulic cylinder 6. Since the horizontal part of the L-shaped clamp 7446 is located above the metal sheet and does not contact the metal sheet, it blocks the metal sheet from moving upward. Therefore, during the process of being drawn out from the upper mold structure 9, the finished hardware product will automatically separate from the upper mold structure 9, leaving the finished hardware product inside the lower mold structure 8. During the process of the upper mold structure 9 being drawn out from the lower mold structure 8, the tightness of the contact between the finished product and the lower mold structure 8 will be loosened, making it easier to unload the finished product later.

[0050] Under the continuous movement of the hydraulic cylinder 6, after the finished product is separated from the upper mold structure 9, the L-shaped clamp 7446 will also gradually separate from the finished product. At the same time, the upper mold structure 9 will drive the lower mold structure 8 to operate, moving the stamped hardware backward, and dragging the unstamped finished product backward at the same time, and moving it to the bottom of the upper mold structure 9 so that the hardware stamping operation can continue later.

[0051] For further information, see Figure 5 , the vertical part of the L-shaped clamping block 7446 close to the lower mold structure 8 has a number of teeth to ensure the stability of the metal sheet during the clamping process;

[0052] Embodiment 2: This embodiment optimizes the stamping process based on embodiment 1, so as to achieve the purpose of moving materials during the stamping process and improve the degree of automation of the device.

[0053] Specifically, to achieve the above purpose, refer to Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 In this embodiment, the lower mold structure 8 includes a fixed square ring 81, and a material moving mechanism 82 is installed on the inner surface of the fixed square ring 81, and a driving mechanism 83 is installed in the gaps on the left and right sides of the fixed square ring 81 and the material moving mechanism 82;

[0054] In this case, a placement slot is also provided at the center of the support frame 4. Figure 6 , install the fixed square ring 81 in the placement groove, and install handles on the left and right sides of the fixed square ring 81. Use the handles to support the fixed square ring 81 on the top of the support frame 4. Modularize the fixed square ring 81, the material moving mechanism 82 and the driving mechanism 83. If the lower mold structure 8 is damaged, the lower mold structure 8 can be lifted out of the placement groove as a whole for replacement or repair.

[0055] Specific, in order to achieve the purpose of the lower die structure 8 described in embodiment one can be matched with the upper die structure 9 metal sheet stamping and can be automatically through the movement of the lower die structure 8 feeding and discharging, material moving mechanism 82 includes two rotating in the fixed square ring 81 inner surface spindle 821, two spindle 821 surface are provided with polygonal shaft roller 822, two polygonal shaft roller 822 outer surface is provided with a plurality of metal transmission seat 823, and adjacent two metal transmission seat 823 are connected by hinge, each metal transmission seat 823 surface is through bolt with dismounting form installed lower concave die 824;

[0056] First, in the embodiment, referring to Figure 7 And Figure 8 , the lower concave die 824 is installed in the form of bolt, the shape and size of the lower concave die 824 can be customized according to actual production demand;

[0057] Second, in order to ensure the stamping quality of hardware, the diameter of two spindle 821 can be selected as the diameter of the thick, which can withstand the impact force generated during the stamping process between the upper die structure 9 and the lower concave die 824, and the spindle 821 will not be deformed, which ensures that the spindle 821 can operate normally;

[0058] In addition, the size and shape of the polygonal shaft roller 822 can also be customized according to actual situation, as long as it can match with the lower concave die 824, the polygonal shaft roller 822 used in the embodiment is a regular polygon, which is used to make the stamping surface of the lower concave die 824 parallel to the upper convex die 92 during stamping process, so as to ensure the stamping quality.

[0059] Further, referring to Figure 7 、 Figure 8 And Figure 9 , in the embodiment, the driving mechanism 83 includes a gear 831 fixed on the surface of the spindle 821 through a one-way bearing, and a rack 832 engaged with the surface of the gear 831, the rack 832 is provided with a spring four 835 at the bottom, the spring four 835 is provided with an L-shaped fixed plate 833 fixed on one side of the bottom of the fixed square ring 81, and the L-shaped fixed plate 833 is provided with a supporting plate 834 for limiting the rack 832;

[0060] In the embodiment, during the descending process of the upper die structure 9, the rack 832 gradually approaches the supporting plate 834, and the gear 831 rotates clockwise in the perspective of the left front view, at this time, the spindle 821 will not rotate under the action of the one-way bearing;

[0061] After the stamping is completed by the cooperation of the upper mold structure 9 and the lower concave mold 824, the upper mold structure 9 moves upward, and through the linkage rack 832, drives the gear 831 to rotate counterclockwise, thereby driving the main shaft 821 to rotate counterclockwise to drag the stamped hardware product backward, and the unstamped metal sheet moves backward. After the opening of the lower concave mold 824 is downward, the stamped hardware product will automatically pour out and leave through the blanking chute 2 and the guide tube 3.

[0062] In addition, the two racks 832 are both mounted on the inner wall of the fixed square ring 81 through slide rails and buckles.

[0063] Embodiment 3: Based on embodiment 2, this embodiment can cooperate with the lower mold structure 8 to punch the metal sheet and can be linked with the lower mold structure 8 to unload the punched parts and automatically load the unpunched parts.

[0064] Specifically, to achieve the above purpose, refer to Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11 The upper mold structure 9 includes a fixed plate 91 installed at the bottom of the piston rod of the hydraulic cylinder 6, and one side of the two guide ropes 73 is respectively installed on the left and right sides of the top of the fixed plate 91. The bottom of the fixed plate 91 is detachably mounted with an upper convex mold 92 by bolts. The left and right sides of the fixed plate 91 are each provided with a guide rod 3 93. The bottom of the two guide rods 3 93 are both equipped with a pressing block 94. Two supporting pieces 96 are installed on the rear side of the fixed plate 91. A spring 2 95 is commonly provided between the top of the outer surface of the two guide rods 3 93 and the fixed plate 91.

[0065] In this case, when the upper convex mold 92 moves downward, the polygonal shaft roller 822 stops rotating. At this time, one of the metal transmission seats 823 is located directly below the upper convex mold 92. When the upper convex mold 92 continues to move downward, the pressing block 94 presses on the metal transmission seat 823. As the upper convex mold 92 continues to move downward, the spring 2 95 deforms and generates elastic force, which can firmly fix the metal transmission seat 823 directly below the upper convex mold 92, preventing failure caused by the offset of the position of the metal transmission seat 823 during the stamping process and thus reducing the quality of the hardware.

[0066] The top of the rack 832 is cylindrical and slides inside the support piece 96.

[0067] Among the above, Figure 11As can be seen, the top of the rack 832 slides on the fixed plate 91. A horizontal limit block is installed on the top of the rack 832. When the support plate 96 lifts the horizontal limit block upward, the rack 832 and other structures can be driven to operate. The rotation timing of the rack 832 can be determined by the contact timing between the horizontal limit block of the rack 832 and the support plate 96.

[0068] When the rack 832 needs to move a long distance, the horizontal limit block needs to be close to the support piece 96 so that the support piece 96 can move synchronously with the rack 832 when it starts to move upward.

[0069] On the contrary, when the horizontal limit block moves upward away from the supporting piece 96, after the supporting piece 96 moves a certain distance, the supporting piece 96 can move synchronously with the rack 832, so that the moving distance of the rack 832 can be adjusted.

[0070] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A punching device for small hardware parts, comprising a stand (1), characterized in that: A blanking trough (2) is installed at the center position of the top of the platform (1), a material guide tube (3) is installed at the top of the platform (1) below the blanking trough (2), a support frame (4) is installed on the outer side of the top of the platform (1), a lower mold structure (8) is installed at the center position of the support frame (4), a support frame (5) is installed on the front side of the top of the support frame (4), a hydraulic cylinder (6) is installed at the center position of the top of the support frame (5), an upper mold structure (9) is installed at the bottom of the piston rod of the output end of the hydraulic cylinder (6), both sides of the front side of the support frame (4) are provided with placement grooves, and a clamping device (7) is installed in each placement groove.

2. A punching device for small hardware according to claim 1, characterized in that: The clamping device (7) comprises a fixed pulley 1 (71) and a fixed pulley 2 (72) respectively mounted on the top side and the bottom side of the support frame 2 (5); a guide rope (73) is wound around the outer sides of the fixed pulley 1 (71) and the fixed pulley 2 (72); one end of the guide rope (73) is mounted on the top of the upper mold structure (9); and a guide mechanism (74) is mounted on the other side; the guide mechanism (74) is mounted on one side inside the support frame 1 (4) and is located on the same vertical plane as the fixed pulley 2 (72).

3. A punching device for small hardware according to claim 2, characterized in that: The guiding mechanism (74) includes a toggling rod (741) rotating on one side of the support frame 2 (5), the other side of the guide rope (73) is fixed on the top of the toggling rod (741), a shaft is installed on the surface of the toggling rod (741), and a slip ring (742) is provided on the outer surface of the shaft, a guide rod 1 (743) is fixed on the side of the slip ring (742) close to the lower mold structure (8), and a buffer structure (744) is provided on the side of the guide rod 1 (743) away from the slip ring (742) and slides on the top of the support frame 2 (5).

4. A punching device for small hardware according to claim 3, characterized in that: The buffer structure (744) includes a sliding shell (7441) fixed to one end of the guide rod (743), and the sliding shell (7441) slides on the top of the support frame (5). A spring (7442) is provided inside the sliding shell (7441), and a push plate (7444) is fixed to the other end of the spring (7442), and the push plate (7444) is provided in the inner cavity of the sliding shell (7441). A guide rod (7445) extending through the sliding shell (7441) to the outside is fixed on the side of the push plate (7444) close to the lower mold structure (8), and an L-shaped clamp (7446) is installed on the end of the guide rod (7445) away from the sliding shell (7441). The outer surface of the sliding shell (7441) slides with a fixed seat (7443) fixed to the top of the support frame (4).

5. A punching device for small hardware according to claim 4, characterized in that: The vertical portion of the L-shaped clamp (7446) close to the lower mold structure (8) has a plurality of teeth.

6. A punching device for small hardware according to claim 2, characterized in that: The upper mold structure (9) includes a fixed plate (91) installed at the bottom of the piston rod of the hydraulic cylinder (6), and one side of the two guide ropes (73) are respectively installed on the left and right sides of the top of the fixed plate (91), and the bottom of the fixed plate (91) is installed with an upper convex mold (92) by bolts in a detachable form. The left and right sides of the fixed plate (91) are both provided with guide rods (93), and the bottoms of the two guide rods (93) are both provided with pressing blocks (94). Two supporting plates (96) are installed on the rear side of the fixed plate (91), and a spring (95) is commonly provided between the top of the outer surface of the two guide rods (93) and the fixed plate (91).

7. A punching device for small hardware according to claim 6, characterized in that: The lower mold structure (8) includes a fixed square ring (81), and a material shifting mechanism (82) is installed on the inner surface of the fixed square ring (81). Drive mechanisms (83) are installed in the gaps on both sides of the fixed square ring (81) and the material shifting mechanism (82).

8. The punching device for small hardware according to claim 7, characterized in that: The material transfer mechanism (82) comprises two main shafts (821) rotating on the inner surface of the fixed square ring (81), polygonal rollers (822) are installed on the surface of the two main shafts (821), and a plurality of metal transmission seats (823) are provided on the outer surface of the two polygonal rollers (822). Two adjacent metal transmission seats (823) are connected by hinges, and each surface of the metal transmission seat (823) is provided with a concave mold (824) installed in a detachable manner by bolts.

9. A punching device for small hardware according to claim 8, characterized in that: The driving mechanism (83) includes a gear (831) fixed to the surface of the main shaft (821) through a one-way bearing, and a rack (832) meshed with the surface of the gear (831), a spring (835) is installed at the bottom of the rack (832), an L-shaped fixing plate (833) fixed to one side of the bottom of the fixed square ring (81) is installed at the bottom of the spring (835), and a supporting plate (834) for limiting the rack (832) is installed in the middle of the L-shaped fixing plate (833).

10. A punching device for small hardware parts according to claim 9, characterized in that: The top of the rack (832) is cylindrical and slides inside the support piece (96).

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