Lever type stamping structure

Abstract

The utility model discloses a lever type punching structure which comprises a machining table, a die arranged on the machining table and four punch parts. The four punch parts are evenly distributed on the periphery of the die in the circumferential direction. The punch part comprises a transverse sliding seat connected to the machining table in a sliding mode, a replacement module detachably connected to the transverse sliding seat and an L-shaped lever with the middle rotationally connected to the machining table. A crankshaft is rotationally connected under the processing table; a middle rotating shaft is arranged in the middle of the L-shaped lever; a longitudinal through hole penetrates through the upper end of the machining table. A radial through hole with the two ends penetrating out is transversely formed in the longitudinal through hole. And the middle rotating shafts are rotationally connected into the corresponding radial through holes. The number of parts machined at a time is larger, and pressure application is more uniform. Replacing the die set to enable the punch to adapt to dies of different parts; the structure is more compact; and the L-shaped lever reduces the use requirement of the power source part.

Description

Technical Field

[0001] This utility model belongs to the field of stamping equipment technology, and in particular relates to a lever-type stamping structure. Background Technology

[0002] Pressure forming equipment is widely used in metal forming and processing. It utilizes molds and pressure applied to metal blanks to exert external force on plates, strips, pipes, and profiles, causing significant plastic deformation and ultimately obtaining workpieces with specific shapes and mechanical properties. Pressure forming has many sub-fields. For example, hot forging hydraulic presses are forging equipment capable of performing various free forging processes and are among the most widely used equipment in the forging industry. Four-column hydraulic presses are suitable for pressing processes of plastic materials, such as powder product forming, plastic product forming, cold (hot) extrusion metal forming, thin plate stretching, and processes such as transverse pressing, bending, flipping, and straightening.

[0003] Chinese patent document CN213134905U discloses a novel connecting rod and slider mechanism for a flat forging machine, relating to the field of connecting rod and slider technology for flat forging machines. It includes a main sliding device, a driving device, a connecting rod device, a side sliding device, and a fixing device. The main sliding device includes a rocker arm; the driving device includes a connecting plate and a cam; the inner surfaces of several connecting plates are rotatably engaged with the outer surface of the rocker arm; the connecting rod device includes a cam groove and a connecting rod; the inner surface of the cam groove is rotatably engaged with the outer surface of the cam; the side sliding device includes a side slider; the outer surface of the side slider has a first mounting groove; and one surface of the connecting rod connects to the mounting groove. The main slider can move forward via mechanical transmission, providing stronger power than previous hydraulic transmission. The combination of several rods and connecting rods provides powerful force for the sliding of the side slider, resulting in a wider range of motion, adjustable adjustment, and more precise forging stamping.

[0004] In practical applications, flat forging machines often need to process various parts using different dies, and the position and shape of the punch also vary depending on the die. In the aforementioned patented solution, the punch and corresponding transmission mechanism are tightly connected, making it difficult to adjust and replace the punch. Therefore, the application scope of this patented solution is narrow and cannot meet the processing requirements of various parts. In addition, due to structural limitations, the aforementioned patented solution can only set up a processing position for one part. The accumulation of multiple processing positions would greatly increase the complexity of the structure and the size of the equipment, thus also resulting in low processing efficiency. Utility Model Content

[0005] To overcome the technical problems of existing technologies where the punch position on the linkage-slider mechanism is uniquely determined, which not only makes it incompatible with dies of different shapes and types, but also limits the processing position to only one part, resulting in a narrow application range and low working efficiency for the corresponding flat forging machine, one objective of this utility model is to provide a lever-type stamping structure. By evenly distributing multiple punches along the circumferential direction on the outer periphery of a die with multiple part processing positions, the number of processing positions for parts is increased. The structure is not only compact, but the applied pressure is also more uniform. Furthermore, the punches are designed as easily disassembled integrated blocks and punches, allowing for the replacement of different specifications of integrated blocks and punches depending on the processing die, thus increasing the applicability of the machine tool.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a lever-type stamping structure, including a machining table horizontally arranged in the middle of a machine tool, a mold arranged on the machining table, and four punches arranged on the upper part of the machining table; the four punches are evenly distributed around the outer periphery of the mold along the circumferential direction; each punch includes a horizontally slidably connected transverse slide block on the upper part of the machining table, a replacement module detachably connected to the transverse slide block facing the mold, and an L-shaped lever rotatably connected in the middle to the machining table for driving the transverse slide block to reciprocate; a crankshaft rotatably connected to each of the L-shaped levers is rotatably connected directly below the machining table; wherein, a central rotating shaft is arranged coaxially with the rotation axis of the L-shaped lever in the middle; four longitudinal through holes are longitudinally arranged on the upper part of the machining table; radial through holes with both ends extending out of the machining table are transversely arranged in the longitudinal through holes; the central rotating shaft is rotatably connected in the corresponding radial through holes.

[0007] Furthermore, the punch head includes a U-shaped base with an upward-facing opening on the upper end of the processing table; the transverse slide is slidably connected inside the U-shaped base; pressure plates are respectively provided on both sides of the upper end of the U-shaped base in the sliding direction of the transverse slide; transverse stiffeners are respectively provided on both sides of the outer wall of the transverse slide in its sliding direction; the transverse stiffeners are located between the bottom of the opening of the U-shaped base and the pressure plates.

[0008] Furthermore, the replacement module includes an integrated block longitudinally inserted into the transverse slide block on the side facing the mold, and two pressure blocks transversely inserted into the integrated block on the side facing the mold; a punch is provided on the side of the pressure block facing the mold; an end cap is provided on the side of the punch away from the mold; the end cap is located between the pressure block and the integrated block.

[0009] Specifically, the integrated block has two symmetrically arranged longitudinal inserts; the transverse slide has two symmetrically arranged longitudinal slots at one end facing the mold; the two longitudinal inserts are respectively slidably connected in the two longitudinal slots; a first limiting plate is detachably connected to the upper end of the transverse slide; the first limiting plate is used to restrict the longitudinal inserts from sliding out of the longitudinal slots.

[0010] Specifically, the upper and lower ends of the pressure block are respectively provided with transverse insert plates; the integrated block is symmetrically provided with two transverse slots at one end facing the mold; the two transverse insert plates are respectively slidably connected in the two transverse slots; the integrated block is detachably connected to the two ends of the transverse slots; the second limiting plates are used to restrict the transverse insert plates from sliding out of the transverse slots.

[0011] Depending on the different stamping positions on different dies, different specifications of the integrated blocks are selected and installed. Because the installation position of the pressure block on the integrated block varies, the stamping position of the punch also varies, thus enabling the punch to adapt to different stamping positions on various dies. Simultaneously adjusting the integrated blocks and the pressure block allows the stamping force to be evenly distributed on the two punches, helping to reduce die wear.

[0012] Furthermore, a longitudinal slider is slidably connected to the machine tool directly below the processing table; the longitudinal slider is connected to the L-shaped lever; an eccentric shaft is eccentrically arranged in the middle of the crankshaft; a main connecting rod is arranged between the eccentric shaft and the lower end of the longitudinal slider; the upper end of the main connecting rod is rotatably connected to the longitudinal slider, and the lower end is rotatably connected to the outer circumference of the eccentric shaft.

[0013] Specifically, the punch head includes a longitudinal sliding seat that is slidably connected to the transverse sliding seat; one end of the L-shaped lever is rotatably connected to the longitudinal sliding seat, and the other end is provided with a connecting rod between it and the longitudinal slider; the two ends of the connecting rod are rotatably connected to the longitudinal slider and the L-shaped lever, respectively.

[0014] Specifically, the upper end of the transverse slide seat is provided with a receiving cavity; the end of the receiving cavity facing the mold is provided with an inner groove in the longitudinal direction; the longitudinal slide seat is located in the receiving cavity; two longitudinal stiffeners are symmetrically arranged on the longitudinal slide seat; the two longitudinal stiffeners are respectively slidably connected in the inner groove in the longitudinal direction; and a sealing plate for closing the receiving cavity is provided at the upper end of the transverse slide seat.

[0015] Specifically, a linkage seat is provided at the upper end of the longitudinal slider; a cross rib is provided at the upper end of the linkage seat; the support rod is rotatably connected to the cross rib; two connecting shafts are horizontally arranged on the longitudinal slider, one of which is provided with the linkage seat, and the other is rotatably connected to the main connecting rod; radial rods are respectively provided at both ends of the connecting shaft outside the longitudinal slider, and the length of the radial rod is greater than the diameter of the connecting shaft.

[0016] Furthermore, the eccentric shaft includes a primary eccentric shaft eccentrically disposed on the crankshaft and a secondary eccentric shaft eccentrically disposed on the primary eccentric shaft; the main connecting rod is rotatably connected to the outer periphery of the secondary eccentric shaft.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model has a punch head arranged in a ring around the outer periphery of the mold, which can process more parts in a single operation and apply pressure more evenly, reducing wear on the punch head and mold and helping to extend the service life of the mold and equipment.

[0019] 2. The punch head of this utility model has a replaceable and easy-to-disassemble replacement module, which makes the punch head adaptable to molds of different parts and increases its applicability; and the driving mechanism of the punch head is located directly below the worktable, which also makes the structure more compact, especially reducing the lateral space occupation; while the L-shaped lever plays a transmission role, it also increases the torque of the power source component and reduces the usage requirements of the power source component. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded structural diagram of the upper part of the processing table of this utility model.

[0022] Figure 3 This is an exploded structural diagram of the lower part of the processing table of this utility model;

[0023] Figure 4 This is an exploded structural diagram of the punch head of this utility model;

[0024] Figure 5 This is a schematic diagram of the crankshaft of this utility model.

[0025] In the diagram: 1. Machining table; 11. Radial perforation; 12. Collection groove; 13. Longitudinal perforation; 21. Longitudinal slider; 22. Crankshaft; 221. Primary eccentric shaft; 222. Secondary eccentric shaft; 223. Large gear; 23. Main connecting rod; 24. Transmission shaft; 241. Small gear; 242. Large pulley; 25. Connecting shaft; 251. Radial rod; 26. Linkage seat; 261. Cross rib; 27. Support rod; 31. Hydraulic cylinder; 32. Mold A surface; 33. Mold B surface; 4. Punch head; 41. U-shaped... Base; 411, pressure plate; 42, L-shaped lever; 43, central pivot; 44, transverse slide; 441, transverse stiffener; 442, receiving cavity; 443, inner slide groove; 444, longitudinal slot; 445, first limiting plate; 446, sealing plate; 45, longitudinal slide; 451, longitudinal stiffener; 46, integrated block; 461, longitudinal insert plate; 462, transverse slot; 463, second limiting plate; 47, pressure block; 471, stepped perforation; 472, transverse insert plate; 48, punch; 481, end cap; 49, pad block. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] See Figures 1-5 A lever-type stamping structure includes a processing table 1 horizontally disposed in the middle of a machine tool, a mold disposed at the center of the upper end of the processing table 1, and four punches 4 disposed on the upper end of the processing table 1; the four punches 4 are evenly distributed around the outer periphery of the mold along the circumferential direction; a collection groove 12 is provided on the outer periphery of the upper end of the processing table 1.

[0031] The punch head 4 includes a U-shaped base 41 with an upward-facing opening at the upper end of the processing table 1, a horizontal slide block 44 slidably connected to the U-shaped base 41, a replacement module detachably connected to the side of the horizontal slide block 44 facing the mold, a longitudinal slide block 45 slidably connected to the horizontal slide block 44, and an L-shaped lever 42 rotatably connected in the middle to the processing table 1 and rotatably connected to the longitudinal slide block 45 at its upper end.

[0032] The replacement module includes an integrated block 46 longitudinally inserted into the transverse slide 44 on the side facing the mold, and two pressure blocks 47 transversely inserted into the integrated block 46 on the side facing the mold. A punch 48 is provided on the side of the pressure block 47 facing the mold. An end cap 481 is provided on the side of the punch 48 away from the mold. The diameter of the end cap 481 is larger than the diameter of the punch 48. A stepped through hole 471 is provided on the pressure block 47. The punch 48 passes through the stepped through hole 471, and the end cap 481 is pressed between the pressure block 47 and the integrated block 46. A pad 49 is provided between the end cap 481 and the integrated block 46.

[0033] The integrated block 46 has two symmetrically arranged longitudinal insert plates 461; the transverse slide block 44 has two symmetrically arranged longitudinal slots 444 at one end facing the mold; the two longitudinal insert plates 461 are respectively slidably connected to the two longitudinal slots 444; the upper end of the transverse slide block 44 is detachably connected to a first limiting plate 445; the first limiting plate 445 is used to restrict the longitudinal insert plates 461 from sliding out of the longitudinal slots 444.

[0034] The upper and lower ends of the pressure block 47 are respectively provided with transverse insert plates 472; the integrated block 46 is symmetrically provided with two transverse slots 462 at one end facing the mold; the two transverse insert plates 472 are respectively slidably connected to the two transverse slots 462; the integrated block 46 is detachably connected to the two ends of the transverse slots 462; the second limiting plates 463 are used to restrict the transverse insert plates 472 from sliding out of the transverse slots 462.

[0035] The L-shaped lever 42 has a central rotating shaft 43 coaxially arranged with its rotating shaft in the middle; the upper end of the processing table 1 has four longitudinal through holes 13; the longitudinal through holes 13 have radial through holes 11 extending out of the processing table 1 at both ends; the central rotating shaft 43 is rotatably connected to the corresponding radial through holes 11.

[0036] The upper end of the U-shaped base 41 is provided with pressure plates 411 on both sides of the sliding direction of the transverse slide 44; the outer wall of the transverse slide 44 is provided with transverse stiffeners 441 on both sides of its sliding direction; the transverse stiffeners 441 are located between the bottom of the opening of the U-shaped base 41 and the pressure plates 411.

[0037] The upper end of the transverse slide block 44 is provided with a receiving cavity 442; the end of the receiving cavity 442 facing the mold is provided with an inner sliding groove 443; the longitudinal slide block 45 is located in the receiving cavity 442; two longitudinal stiffeners 451 are symmetrically arranged on the longitudinal slide block 45; the two longitudinal stiffeners 451 are respectively longitudinally slidably connected in the inner sliding groove 443; the upper end of the transverse slide block 44 is provided with a sealing plate 446 for closing the receiving cavity 442.

[0038] A longitudinal slider 21 is slidably connected to the bottom of the processing table 1; a crankshaft 22 is rotatably connected to the bottom of the longitudinal slider 21; an eccentric shaft is eccentrically arranged in the middle of the crankshaft 22; the eccentric shaft includes a primary eccentric shaft 221 eccentrically arranged on the crankshaft 22 and a secondary eccentric shaft 222 eccentrically arranged on the primary eccentric shaft 221; a main connecting rod 23 is arranged between the secondary eccentric shaft 222 and the longitudinal slider 21; the upper end of the main connecting rod 23 is rotatably connected to the longitudinal slider 21, and the lower end is rotatably connected to the outer periphery of the secondary eccentric shaft 222.

[0039] The upper end of the longitudinal slider 21 is provided with a linkage seat 26; the upper end of the linkage seat 26 is provided with a cross rib plate 261; the punch head 4 includes a support rod 27 with one end rotatably connected to the lower end of the L-shaped lever 42, and the lower end of the support rod 27 is rotatably connected to the cross rib plate 261.

[0040] Two connecting shafts 25 are horizontally arranged on the longitudinal slider 21. One of the connecting shafts 25 is equipped with the linkage seat 26, and the other connecting shaft 25 is rotatably connected to the main connecting rod 23. Radial rods 251 are respectively arranged at both ends of the connecting shaft 25 on the outside of the longitudinal slider 21. The length of the radial rods 251 is greater than the diameter of the connecting shaft 25.

[0041] A hydraulic cylinder 31 is longitudinally arranged above the processing table 1; the mold includes a mold A surface 32 arranged on the lower moving end of the hydraulic cylinder 31 and a mold B surface 33 arranged at the center of the upper end of the processing table 1.

[0042] A speed change shaft 24 is rotatably connected below the processing table 1; a large gear 223 is provided at one end of the crankshaft 22; a small gear 241 is provided at one end of the speed change shaft 24 and is connected to the large gear 223; a large pulley 242 is provided at the other end of the speed change shaft 24; and the motor is connected to the large pulley 242 via a belt.

[0043] Stamping process: Hydraulic cylinder 31 brings mold A surface 32 and mold B surface 33 together, encasing the preheated roller inside; motor drives crankshaft 22 to rotate, which in turn rotates eccentric shaft, which pulls down longitudinal slider 21 via main connecting rod 23. Longitudinal slider 21 drives L-shaped lever 42 to rotate downward via support rod 27, and the rotation of L-shaped lever 42 pushes longitudinal slide seat 45 to slide transverse slide seat 44 towards the mold, thereby causing punch 48 to stamp the roller and form a part.

[0044] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A lever-type stamping structure, characterized in that: The machine tool includes a machining table horizontally positioned in the middle, a mold mounted on the machining table, and four punches mounted on the upper part of the machining table. The four punches are evenly distributed around the outer periphery of the mold in a circumferential direction. Each punch includes a horizontally slidable slide block connected to the upper part of the machining table, a replacement module detachably connected to the slide block facing the mold, and an L-shaped lever rotatably connected to the machining table in the middle for driving the slide block to reciprocate. A crankshaft rotatably connected to each L-shaped lever is located directly below the machining table. A central rotating shaft is provided in the middle of each L-shaped lever and is coaxial with its rotation axis. Four longitudinal through holes are provided longitudinally through the upper part of the machining table. Radial through holes extending out of the machining table at both ends are provided transversely within each longitudinal through hole. The central rotating shaft is rotatably connected within the corresponding radial through hole.

2. The stamping structure as described in claim 1, characterized in that: The punch head includes a U-shaped base with an upward-facing opening on the upper end of the processing table; the transverse slide is slidably connected inside the U-shaped base; pressure plates are respectively provided on both sides of the upper end of the U-shaped base in the sliding direction of the transverse slide; transverse stiffeners are respectively provided on both sides of the outer wall of the transverse slide in the sliding direction; the transverse stiffeners are located between the bottom of the opening of the U-shaped base and the pressure plates.

3. The stamping structure as described in any one of claims 1-2, characterized in that: The replacement module includes an integrated block that is longitudinally inserted into the transverse slide block on the side facing the mold, and two pressure blocks that are transversely inserted into the integrated block on the side facing the mold; a punch is provided on the side of the pressure block facing the mold; an end cap is provided on the side of the punch away from the mold; the end cap is located between the pressure block and the integrated block.

4. The stamping structure as described in claim 3, characterized in that: The integrated block has two symmetrically arranged longitudinal inserts; the transverse slide has two symmetrically arranged longitudinal slots at one end facing the mold; the two longitudinal inserts are respectively slidably connected in the two longitudinal slots; a first limiting plate is detachably connected to the upper end of the transverse slide; the first limiting plate is used to restrict the longitudinal inserts from sliding out of the longitudinal slots.

5. The stamping structure as described in claim 3, characterized in that: The upper and lower ends of the pressure block are respectively provided with transverse insert plates; the integrated block is symmetrically provided with two transverse slots at one end facing the mold; the two transverse insert plates are respectively slidably connected in the two transverse slots; the integrated block is detachably connected to the two ends of the transverse slots; the second limiting plates are used to restrict the transverse insert plates from sliding out of the transverse slots.

6. The stamping structure as described in any one of claims 1-2, characterized in that: A longitudinal slider is slidably connected to the machine tool directly below the processing table; the longitudinal slider is connected to the L-shaped lever; an eccentric shaft is eccentrically arranged in the middle of the crankshaft; a main connecting rod is arranged between the eccentric shaft and the lower end of the longitudinal slider; the upper end of the main connecting rod is rotatably connected to the longitudinal slider, and the lower end is rotatably connected to the outer circumference of the eccentric shaft.

7. The stamping structure as described in claim 6, characterized in that: The punch head includes a longitudinal sliding seat that is slidably connected to the transverse sliding seat; one end of the L-shaped lever is rotatably connected to the longitudinal sliding seat, and the other end is provided with a connecting rod between it and the longitudinal slider; the two ends of the connecting rod are rotatably connected to the longitudinal slider and the L-shaped lever, respectively.

8. The stamping structure as described in claim 7, characterized in that: The upper end of the transverse slide block is provided with a receiving cavity; the end of the receiving cavity facing the mold is provided with an inner groove in the longitudinal direction; the longitudinal slide block is located in the receiving cavity; two longitudinal stiffeners are symmetrically arranged on the longitudinal slide block; the two longitudinal stiffeners are respectively slidably connected in the inner groove in the longitudinal direction; the upper end of the transverse slide block is provided with a sealing plate for closing the receiving cavity.

9. The stamping structure as described in claim 7, characterized in that: A linkage seat is provided at the upper end of the longitudinal slider; a cross rib is provided at the upper end of the linkage seat; the support rod is rotatably connected to the cross rib; two connecting shafts are horizontally arranged on the longitudinal slider, one of which is provided with the linkage seat, and the other is rotatably connected to the main connecting rod; radial rods are respectively provided at both ends of the connecting shaft outside the longitudinal slider, and the length of the radial rod is greater than the diameter of the connecting shaft.

10. The stamping structure as described in claim 6, characterized in that: The eccentric shaft includes a primary eccentric shaft eccentrically mounted on the crankshaft and a secondary eccentric shaft eccentrically mounted on the primary eccentric shaft; the main connecting rod is rotatably connected to the outer periphery of the secondary eccentric shaft.

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