A compound-action punch press and its usage method

Abstract

This invention relates to a double-acting punch press and its method of use. The punch press includes a base, a drive assembly, a transmission assembly, an upper die, a lower die, an outer slide, and an inner slide. The drive assembly is mounted on the base, and the transmission assembly is connected to the drive assembly, the outer slide, and the inner slide. The upper die is connected to the outer slide, and the lower die is mounted on the base. The transmission assembly includes a crankshaft, a first connecting rod, and a second connecting rod connected to the crankshaft via first and second connecting rod journals, respectively. The journal centerlines of the connecting rods are parallel, and the first connecting rods are symmetrically arranged in pairs on both sides of the second connecting rod. The transmission assembly also includes a toggle-type connecting rod assembly, specifically including first and second toggle rods connected via a second pin. The first connecting rod is connected to the first toggle rod via a third pin, the second toggle rod is connected to the outer slide via a first pin, and the inner slide is connected to the second connecting rod. The drive assembly can complete one punching action for each of the inner and outer slides with one rotation, simplifying the production process and reducing energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of press technology, specifically relating to a double-acting punch press and its usage method. Background Technology

[0002] Punch presses, also known as stamping presses, are widely used in various fields and can process blanking, punching, forming, deep drawing, trimming, fine blanking, shaping, riveting, and extrusion parts. The operating principle of a punch press is to convert circular motion into linear motion. Specifically, the motor outputs power to drive a flywheel, which in turn drives gears, crankshaft, connecting rods, etc., via a clutch, thus converting the motion into the linear motion of a slide block.

[0003] Punch presses can be equipped with corresponding automatic feeding devices to achieve automated production. Compared with traditional machining, punch press technology can save raw materials and energy, and requires less technical expertise from operators.

[0004] Most existing punch presses are single-action punch presses. During workpiece processing, different processes need to be designed according to the processing requirements, with each station completing one process. However, for workpieces with more complex shapes, such as cross shafts, Y-type tees, automotive CV joints, and automotive wheel hubs, existing single-action punch presses require multiple changes to the die position, or the use of two punch presses to complete the workpiece processing. This is cumbersome, prolongs the workpiece processing time, and reduces processing efficiency.

[0005] To accelerate manufacturing efficiency, injection molding can also be used to form complex-shaped workpieces. However, compared with stamping, the workpieces produced by injection molding are not strong enough and are prone to damage.

[0006] Therefore, it is necessary to provide a punch press that can quickly manufacture complex-shaped workpieces while ensuring strength. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] To address the problems of complex operation and long processing time when machining complex-shaped workpieces using single-action punch presses in existing technologies, this invention provides a double-action punch press and its usage method.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0011] A compound-action punch press includes a base, a drive assembly, a transmission assembly, an upper die, a lower die, an outer slide, and an inner slide;

[0012] The drive assembly is mounted on the base, and the transmission assembly is connected to the drive assembly, the outer slider, and the inner slider respectively; the upper die is connected to the outer slider, the lower die is mounted on the base, and the inner slider is located inside the outer slider;

[0013] The transmission assembly includes a crankshaft, a first connecting rod and a second connecting rod connected to the crankshaft via a first connecting rod journal and a second connecting rod journal, respectively. The center lines of the journals of the first connecting rod journal and the second connecting rod journal are parallel, and the first connecting rods are symmetrically arranged in pairs on both sides of the second connecting rod. The transmission assembly also includes a toggle-type connecting rod assembly, which includes a first elbow and a second elbow connected via a second pin. The first connecting rod is connected to the first elbow via a third pin, and the second elbow is connected to the outer slider via a first pin. The inner slider is rotatably connected to the second connecting rod.

[0014] In the aforementioned compound punch press, preferably, the toggle linkage assembly further includes a third toggle connected to the first toggle, the third toggle being connected to the first toggle via a third pin.

[0015] An auxiliary adjustment block is also provided at the other end of the third elbow rod, and the auxiliary adjustment block is connected to the third elbow rod through a fourth pin.

[0016] As described above, the driving assembly of the compound punch press preferably includes a drive motor, a first pulley, a second pulley, a belt, a drive shaft, gears, a flywheel, a clutch, and a brake.

[0017] The output shaft of the drive motor is connected to the first pulley, and the first pulley and the second pulley are connected by the belt drive.

[0018] The second pulley and the gear are respectively mounted on the drive shaft, the flywheel and the clutch are mounted on one end of the crankshaft, the brake is mounted on the other end of the crankshaft, and the flywheel meshes with the gear.

[0019] The reciprocating punch press described above preferably further includes an ejector assembly, which is used to eject the stamped workpiece from the lower die; the ejector assembly includes a drive component, an eccentric shaft, and an ejector core;

[0020] The eccentric shaft includes an eccentric shaft body and a left-turning shaft and a right-turning shaft respectively disposed at both ends of the eccentric shaft body. The center lines of the left-turning shaft and the right-turning shaft are on the same straight line. The center line of the eccentric shaft body is parallel to but does not coincide with the center line of the left-turning shaft.

[0021] One of the left rotating shaft or the right rotating shaft is connected to the driving component, and the eccentric shaft is located below the top material core and in contact with the top material core;

[0022] The top core is inserted into the lower mold.

[0023] In the aforementioned reciprocating punch press, preferably, the driving component is a hydraulic cylinder or a motor.

[0024] The double-acting punch press described above preferably further includes an adjustment component for adjusting the distance between the upper die and the lower die;

[0025] The lower mold includes a fixed platform and a movable platform from bottom to top, and the fixed platform is fixedly mounted on the machine base;

[0026] The adjustment assembly includes a wedge block and a pushing structure. The wedge block is located between the fixed platform and the movable platform, and the wedge block and the movable platform are engaged by an inclined surface.

[0027] The pushing structure is used to push the wedge block to move relative to the fixed platform and the moving platform, so as to adjust the height of the moving platform relative to the upper mold.

[0028] In the aforementioned compound punch press, preferably, the pushing structure includes a motor and a lead screw, the motor and the lead screw are connected by a second gear transmission, and the lead screw is connected to the wedge block.

[0029] In the aforementioned reciprocating punch press, preferably, a baffle is provided at the end of the movable table and the fixed table away from the adjusting component. The baffle is fixedly connected to the fixed table and contacts the movable table.

[0030] In the aforementioned reciprocating punch press, preferably, an air tank is provided on the top of the machine base, and the air tank is connected to the clutch and the brake respectively. The air tank is provided with an air inlet, a clutch connection port, a brake connection port, and a safety valve.

[0031] The present invention also provides a method of using the above-mentioned compound punch press, comprising the following steps:

[0032] S1: Place the material to be processed into the lower die, start the punch press, and the drive assembly transmits power to the first connecting rod and the second connecting rod through the crankshaft;

[0033] S2: The first connecting rod and the toggle-type connecting rod group drive the outer slider and the upper die to descend, perform a stamping of the material to be processed, and then hold the pressure on the upper die and the lower die;

[0034] S3: During the process of the first connecting rod and the toggle-type connecting rod assembly maintaining pressure on the upper and lower dies, the second connecting rod drives the inner slide to descend, and performs a stamping on the material to be processed.

[0035] S4: After the inner slider completes one stamping, the second connecting rod drives the inner slider to rise;

[0036] S5: The first connecting rod and the toggle-type connecting rod group drive the outer slide and the upper die to rise, completing the stamping of a workpiece;

[0037] S6: Repeat steps S1-S5 to complete the stamping process of multiple workpieces.

[0038] (III) Beneficial Effects

[0039] The beneficial effects of this invention are:

[0040] This invention features an outer and inner slider on a single punch press. The outer slider is connected by a first connecting rod and a toggle-type connecting rod assembly, while the inner slider is connected by a second connecting rod. A crankshaft drives the movement of both sliders. The outer and inner sliders move asynchronously, reaching their bottom dead center at different times. First, the outer slider, driven by the first connecting rod and the toggle-type connecting rod assembly, punches the material. Then, pressure is maintained between the upper and lower dies. Finally, the second connecting rod drives the inner slider to descend and punch. In this invention, each rotation of the crankshaft by the drive assembly causes both the outer and inner sliders to reciprocate once, punching the material once. This eliminates the need for multiple punch presses and frequent changes in workpiece position, simplifying the production process, significantly reducing production time, and lowering energy consumption. Attached Figure Description

[0041] Figure 1 This is a front view of the compound-action punch press of the present invention;

[0042] Figure 2 This is a left view of the compound-action punch press in this invention;

[0043] Figure 3 for Figure 1 A sectional view;

[0044] Figure 4 This is a top view of a double-acting punch press;

[0045] Figure 5 This is a partial top view of a double-acting punch press;

[0046] Figure 6 for Figure 2 Left view (partial);

[0047] Figure 7 for Figure 2 A partial schematic diagram;

[0048] Figure 8 This is a partial sectional view of a double-acting punch press;

[0049] Figure 9 for Figure 3 A partial schematic diagram;

[0050] Figure 10 for Figure 4 A partial schematic diagram;

[0051] Figure 11 This is a diagram showing the running trajectory of each node.

[0052] [Explanation of Labels in the Attached Image]

[0053] 1: Machine base; 2: Upper mold; 3: Lower mold; 4: Outer slide block; 5: Inner slide block; 6: Crankshaft; 7: First connecting rod; 8: Second connecting rod; 9: First pin; 10: Second pin; 11: Third pin; 12: Fourth pin; 13: First elbow; 14: Second elbow; 15: Third elbow; 16: Auxiliary adjusting block;

[0054] 17: Drive motor; 18: First pulley; 19: Second pulley; 20: Belt; 21: Drive shaft; 22: Gear; 23: Flywheel; 24: Clutch; 25: Brake;

[0055] 26: Drive component; 27: Eccentric shaft; 28: Ejector core; 29: Fixed platform; 30: Moving platform; 31: Wedge block; 32: Inclined surface;

[0056] 33: Motor; 34: Lead screw; 35: Baffle; 36: Air tank; 361: Air inlet; 362: Clutch connection port; 363: Brake connection port; 364: Safety valve; 37: Spacing between inner and outer sliders; 38: Fixing bolt; 39: First connecting rod cover; 40: Second connecting rod cover;

[0057] 41: Fifth pin; 42: Support rod; 43: Rear copper guide rail; 44: Side copper guide rail; 45:

[0058] Front guide rail plate; 46: Side guide rail plate base plate. Detailed Implementation

[0059] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] Example 1

[0061] like Figure 1-11As shown, this embodiment provides a double-acting punch press, including a base 1, a drive assembly, a transmission assembly, an upper die 2, a lower die 3, an outer slide 4, and an inner slide 5. The lower die 3 is used to hold the material to be processed. The drive assembly is mounted on the base 1. The transmission assembly is connected to the drive assembly, the outer slide 4, and the inner slide 5 respectively. The drive assembly transmits power to the inner slide and the outer slide through the transmission assembly, thereby realizing the stamping and forming of the workpiece. The upper die 2 is connected to the outer slide 4, the lower die 3 is mounted on the base 1, and the inner slide 5 is located inside the outer slide 4. The transmission assembly includes a crankshaft 6, a first connecting rod 7, and a second connecting rod 8 connected to the crankshaft 6 through a first connecting rod journal and a second connecting rod journal respectively. The center lines of the first connecting rod journal and the second connecting rod journal are parallel but do not coincide, so that the inner slide and the outer slide reach the bottom dead center at different times. The first connecting rod 7 includes two rods, with the direction of the crankshaft as the horizontal direction. Figure 3 for Figure 1 A sectional view along the vertical plane containing the horizontal direction. For example... Figure 3 as well as Figure 9 As shown, the paired first links 7 are symmetrically arranged on both sides of the second link 8. Furthermore, as... Figure 2 As shown, the transmission assembly also includes a toggle-type linkage assembly, which specifically includes a first toggle 13 and a second toggle 14 connected by a second pin 10. The first connecting rod 7 is connected to the first toggle 13 via a third pin 11, and the second toggle 14 is connected to the outer slider 4 via a first pin 9. The inner slider 5 is rotatably connected to the second connecting rod 8, specifically, the inner slider 5 is rotatably connected to the second connecting rod 8 via a fifth pin 41.

[0062] This embodiment features an outer and inner slider on a single punch press. The outer slider is connected by a first connecting rod and a toggle-type connecting rod assembly, while the inner slider is connected by a second connecting rod. A crankshaft drives the first and second connecting rods, which in turn move the inner and outer sliders. The movements of the outer and inner sliders are asynchronous, and they reach their bottom dead center at different times. During one revolution of the crankshaft, the outer slider first punches the material via the first connecting rod and the toggle-type connecting rod assembly. After the first punch, the outer slider does not rise but instead uses the first connecting rod-toggle-type connecting rod assembly to maintain pressure on the upper and lower dies. Then, the second connecting rod drives the inner slider to descend and punch the material a second time. Therefore, in this embodiment, each revolution of the drive assembly drives the crankshaft to cause the outer and inner sliders to reciprocate once, punching the material once each. This enables rapid processing of complex-shaped workpieces. Compared to existing technologies, this embodiment eliminates the need for multiple punch presses and frequent changes in workpiece position, simplifying the production process, significantly reducing production time, and lowering energy consumption.

[0063] In this embodiment, the movement times of the outer slider and the inner slider are different, through... Figure 7You can see the distance 37 between the inner and outer sliders, the first link cap 39 at the top of the first link, and the second link cap at the top of the second link. (See attached image.) Figure 10 As shown, the rear copper guide rail 43, the side copper guide rail 44, the front guide rail plate 45, and the side guide rail plate base plate 46 are mounted on the machine base 1, and the slider moves back and forth along the above guide rails.

[0064] In this embodiment, the entire base 1 is fixed from top to bottom by several fixing bolts 38.

[0065] Preferably, the toggle linkage assembly further includes a third toggle 15 connected to the first toggle 13, and the third toggle 15 is connected to the first toggle 13 via a third pin 11. An auxiliary adjusting block 16 is also provided at the other end of the third toggle 15, and the auxiliary adjusting block 16 is connected to the third toggle 15 via a fourth pin 12. The first and second toggles have both rotational and lateral planar movements, the third toggle 15 swings around the fourth pin 12, and the auxiliary adjusting block 16 adjusts the stamping height.

[0066] Preferably, such as Figure 4-5 As shown, the drive assembly includes a drive motor 17, a first pulley 18, a second pulley 19, a belt 20, a drive shaft 21, a gear 22, a flywheel 23, a clutch 24, and a brake 25. The drive motor 17 can be fixedly mounted on the top of the base 1. The output shaft of the drive motor 17 is connected to the first pulley 18, and the first pulley 18 and the second pulley 19 are connected via the belt 20. The second pulley 19 and the gear 22 are respectively mounted on the drive shaft 21. The flywheel 23 and the clutch 24 are mounted at one end of the crankshaft 6, and the brake 25 is mounted at the other end of the crankshaft 6. The flywheel 23 meshes with the gear 22. Through this structure, power is transmitted from the drive motor to the crankshaft, and then to the inner and outer sliders.

[0067] The compound-action punch press in this embodiment also includes an ejector assembly, the function of which is to eject the stamped workpiece from the lower die 3. For example... Figure 2-3 As shown, the ejector assembly specifically includes a drive component 26, an eccentric shaft 27, and an ejector core 28. The drive component 26 drives the eccentric shaft 27 to rotate, thereby causing the ejector core 28 to move upward relative to the lower mold 3, ejecting the workpiece from the lower mold 3.

[0068] Specifically, the eccentric shaft 27 includes an eccentric shaft body and a left-hand rotating shaft and a right-hand rotating shaft respectively disposed at both ends of the eccentric shaft body. The centerlines of the left-hand rotating shaft and the right-hand rotating shaft are on the same straight line, and the centerline of the eccentric shaft body is parallel to but does not coincide with the centerline of the left-hand rotating shaft. One of the left-hand rotating shafts or the right-hand rotating shaft is connected to the driving component 26. The eccentric shaft body is located below the ejector core 28 and is in contact with the ejector core 28. The ejector core 28 passes through the lower mold 3. In this embodiment, the driving component 26 can be a hydraulic cylinder or a motor.

[0069] The aforementioned eccentric shaft is supported by a support rod 42. Specifically, both ends of the support rod 42 are fixedly connected to the bottom of the movable platform and the base, respectively. Both ends of the eccentric shaft can be mounted on the support rod 42 by bearings or other structures.

[0070] Ordinary rotating shafts can only rotate on their own axis. In this embodiment, an eccentric shaft is used, which has two parallel but non-coincident axes. In addition to rotating on its own axis, it can also transmit revolution to the ejector core through contact between the eccentric shaft and the ejector core. In this way, when the drive component drives the eccentric shaft to rotate, the eccentric shaft can drive the ejector core to move up and down relative to the lower mold, thereby realizing the ejector function.

[0071] During the stamping process, the quality of the workpiece needs to be controlled, and the thickness of the workpiece needs to be checked. Thickness that is too large or too small is unacceptable. To facilitate quality control, the double-acting punch press in this embodiment also includes an adjustment assembly for adjusting the distance between the upper die 2 and the lower die 3.

[0072] Specifically, such as Figure 2 As shown, the lower mold 3 includes a fixed platform 29 and a movable platform 30, arranged from bottom to top. The fixed platform 29 is fixedly mounted on the machine base 1. The adjustment assembly includes a wedge block 31 and a pushing structure. The wedge block 31 is located between the fixed platform 29 and the movable platform 30. The upper part of the wedge block 31 and the bottom of the movable platform 30 are both inclined surfaces. The wedge block 31 and the movable platform 30 cooperate with each other through the inclined surface 32. A baffle 35 is also provided at the end of the movable platform 30 and the fixed platform 29 away from the adjustment assembly. The baffle 35 is fixedly connected to the fixed platform 29 and contacts the movable platform 30. The wedge block 31 passes through the baffle 35 and can move horizontally relative to the baffle 35 under the action of the pushing structure. The pushing structure is used to push the wedge block 31 to move relative to the fixed platform 29 and the movable platform 30 to adjust the height of the movable platform 30 relative to the upper mold 2.

[0073] Preferably, the actuating structure includes a motor 33 and a lead screw 34. The motor 33 and the lead screw 34 can be connected by a transmission via a second gear or the like. The lead screw 34 is connected to the wedge block 31. Figure 6 As shown, motor 33 can be fixedly mounted on machine base 1. By rotating the motor forward and backward, it drives the lead screw, which in turn pushes the wedge block forward or backward, adjusting the distance between the moving platform and the upper die.

[0074] When the thickness of the workpiece is detected to be inconsistent with the preset requirements, the motor can drive the lead screw to rotate, thereby pushing the wedge block to move horizontally, changing the height of the moving table relative to the upper die, so that the workpiece obtained by the next stamping process meets the requirements.

[0075] like Figure 5As shown, an air tank 36 is also provided on the top of the base 1 as an air source for the clutch and brake. The air tank 36 is connected to the clutch 24 and the brake 25 through the clutch connection port 362 and the brake connection port 363, respectively. An air inlet 361 and a safety valve 364 are also provided on the air tank 36.

[0076] To protect the structure of each link, upper and lower bearing shells are installed on each link.

[0077] Example 2

[0078] This embodiment provides a method for using the compound-action punch press of Embodiment 1, including the following steps:

[0079] S1: Place the material to be processed into the lower die 3, start the punch press, and the drive assembly transmits power to the first connecting rod 7 and the second connecting rod 8 through the crankshaft 6.

[0080] S2: The first connecting rod 7 and the toggle-type connecting rod group drive the outer slider 4 and the upper die 2 to descend, perform a stamping of the material to be processed, and then hold the pressure on the upper die 2 and the lower die 3.

[0081] S3: During the process of the first connecting rod 7 and the toggle-type connecting rod group holding pressure on the upper die 2 and the lower die 3, the second connecting rod 8 drives the inner slider 5 to descend and perform a stamping on the material to be processed.

[0082] S4: After the inner slider 5 completes one stamping, the second connecting rod 8 drives the inner slider 5 to rise.

[0083] S5: The first connecting rod 7 and the toggle-type connecting rod group drive the outer slider 4 and the upper die 2 to rise, completing the stamping of a workpiece.

[0084] S6: Repeat steps S1-S5 to complete the stamping process of multiple workpieces.

[0085] This embodiment, through the above operations, can complete two stamping processes for complex-shaped workpieces within one minute, resulting in high processing efficiency.

[0086] This invention uses a crankshaft to drive the movement of both the outer and inner sliders. The inner and outer sliders reach their bottom dead center at different times. First, the outer slider is driven by a first connecting rod and a toggle-type connecting rod assembly, which moves the upper die downwards. The upper and lower dies then punch out the shape of the product, forming a rough blank. After the first connecting rod and toggle-type connecting rod assembly drive the outer slider to its lowest point for the first stamping, they maintain pressure on the upper and lower dies, locking them in place. Then, a second connecting rod drives the inner slider downwards, where it performs a second stamping to form the rough blank. In this embodiment, each revolution of the crankshaft drives one reciprocating motion of both the inner and outer sliders, simplifying the production process, significantly reducing production time, and minimizing energy consumption.

[0087] The above embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. Various modifications or variations made by those skilled in the art within the scope of the claims are all part of the essence of the present invention.

Claims

1. A compound-action punch press, characterized in that, It includes a base, drive assembly, transmission assembly, upper die, lower die, outer slider, and inner slider; The drive assembly is mounted on the base, and the transmission assembly is connected to the drive assembly, the outer slider, and the inner slider respectively; the upper die is connected to the outer slider, the lower die is mounted on the base, and the inner slider is located inside the outer slider; The transmission assembly includes a crankshaft, a first connecting rod and a second connecting rod connected to the crankshaft via a first connecting rod journal and a second connecting rod journal, respectively. The center lines of the journals of the first connecting rod journal and the second connecting rod journal are parallel, and the first connecting rods are symmetrically arranged in pairs on both sides of the second connecting rod. The transmission assembly also includes a toggle-type connecting rod assembly, which includes a first elbow and a second elbow connected via a second pin. The first connecting rod is connected to the first elbow via a third pin, and the second elbow is connected to the outer slider via a first pin. The inner slider is rotatably connected to the second connecting rod. The elbow-type linkage assembly also includes a third elbow (15) connected to the first elbow (13), and the third elbow (15) is connected to the first elbow (13) via a third pin (11). An auxiliary adjustment block (16) is also provided at the other end of the third elbow (15), and the auxiliary adjustment block (16) is connected to the third elbow (15) through a fourth pin (12); The drive assembly includes a drive motor (17), a first pulley (18), a second pulley (19), a belt (20), a drive shaft (21), a gear (22), a flywheel (23), a clutch (24), and a brake (25). The output shaft of the drive motor (17) is connected to the first pulley (18), and the first pulley (18) and the second pulley (19) are connected by the belt (20). The second pulley (19) and the gear (22) are respectively mounted on the transmission shaft (21), the flywheel (23) and the clutch (24) are mounted on one end of the crankshaft (6), and the brake (25) is mounted on the other end of the crankshaft (6). The flywheel (23) meshes with the gear (22).

2. The compound-action punch press according to claim 1, characterized in that, It also includes an ejector assembly for ejecting the stamped workpiece from the lower die (3); the ejector assembly includes a drive (26), an eccentric shaft (27), and an ejector core (28). The eccentric shaft (27) includes an eccentric shaft body and a left-turning shaft and a right-turning shaft respectively disposed at both ends of the eccentric shaft body. The center lines of the left-turning shaft and the right-turning shaft are on the same straight line. The center line of the eccentric shaft body is parallel to but does not coincide with the center line of the left-turning shaft. One of the left rotating shaft or the right rotating shaft is connected to the drive member (26), and the eccentric shaft is located below the top material core (28) and in contact with the top material core (28); The top core (28) is inserted into the lower mold (3).

3. The compound-action punch press according to claim 2, characterized in that, The driving component (26) is a hydraulic cylinder or a motor.

4. The compound-action punch press according to claim 1, characterized in that, It also includes an adjustment component for adjusting the distance between the upper mold (2) and the lower mold (3); The lower mold (3) includes a fixed platform (29) from bottom to top and a movable platform (30), wherein the fixed platform (29) is fixedly mounted on the machine base (1); The adjustment assembly includes a wedge block (31) and a pushing structure. The wedge block (31) is located between the fixed platform (29) and the movable platform (30). The wedge block (31) and the movable platform (30) are engaged by an inclined surface (32). The pushing structure is used to push the wedge block (31) to move relative to the fixed platform (29) and the moving platform (30) to adjust the height of the moving platform (30) relative to the upper mold (2).

5. The compound-action punch press according to claim 4, characterized in that, The pushing structure includes a motor (33) and a lead screw (34). The motor (33) and the lead screw (34) are connected by a second gear transmission. The lead screw (34) is connected to the wedge block (31).

6. The compound-action punch press according to claim 4, characterized in that, A baffle (35) is provided at the end of the movable platform (30) and the fixed platform (29) away from the adjustment component. The baffle (35) is fixedly connected to the fixed platform (29) and contacts the movable platform (30).

7. The compound-action punch press according to claim 1, characterized in that, An air tank (36) is provided on the top of the base (1). The air tank (36) is connected to the clutch (24) and the brake (25) respectively. An air inlet (361), a clutch connection port (362), a brake connection port (363) and a safety valve (364) are provided on the air tank (36).

8. The method of using the compound-action punch press according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Place the material to be processed into the lower die (3), start the punch press, and the drive assembly transmits power to the first connecting rod (7) and the second connecting rod (8) through the crankshaft (6). S2: The first connecting rod (7) and the toggle-type connecting rod group drive the outer slider (4) and the upper die (2) to descend, perform a stamping on the material to be processed, and then hold the pressure on the upper die (2) and the lower die (3); S3: During the process of the first connecting rod (7) and the toggle-type connecting rod group holding pressure on the upper die (2) and the lower die (3), the second connecting rod (8) drives the inner slider (5) to descend and perform a stamping on the material to be processed; S4: After the inner slider (5) completes one stamping, the second connecting rod (8) drives the inner slider (5) to rise; S5: The first connecting rod (7) and the toggle-type connecting rod group drive the outer slider (4) and the upper die (2) to rise, completing the stamping of a workpiece; S6: Repeat steps S1-S5 to complete the stamping process of multiple workpieces.

Images