A cam ejecting mechanism for a multi-station press

Abstract

A cam ejection mechanism of multi-station press is provided, which comprises a chain wheel, a crankshaft, a machine body, a corner turner, a universal coupling, a transfer platform, a bevel gear set, a transmission shaft, a cam, a workbench plate, a ejector rod, a spring, an upper fixed plate, a screw rod, a lower fixed plate and a copper sleeve, the chain wheel comprises a crankshaft chain wheel and a corner turner chain wheel, the crankshaft chain wheel is connected with the corner turner chain wheel through a chain, the corner turner drives the transmission shaft to rotate synchronously through the universal coupling, the transfer platform and the bevel gear set, the transmission shaft is provided with the cam corresponding to each station, the workbench plate is provided with a circular top plate and an ejector rod in a hole, the ejector rod is sleeved with the spring and passes through the copper sleeve, synchronous movement of the crankshaft and the transmission shaft is realized, the ejector rod is ejected, stationary and lowered at different stations and different time periods by using the cam characteristics, the process requirements of multi-station stamping and stretching and unloading are met, the problems of response lag and low control precision of the traditional air cushion ejection mechanism are solved, and the structure is simple and reliable and has strong adaptability.

Description

Technical Field

[0001] This article belongs to the technical field of press equipment, specifically relating to a cam ejection mechanism for a multi-station press. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the manufacturing process of battery casings, as core components, has been upgraded from ordinary stamping to precision pressing. Multi-station presses, with their integrated and automated features, have become key equipment for stretching and forming aluminum battery square (round) shells. They typically have 8-12 processing stations and are equipped with automatic transfer arms, servo oscillating feeders, and station safety detection systems. This is equivalent to the integration of multiple presses and destacking and feeding systems, enabling continuous automated production.

[0003] In the stretching process of battery casing, each station needs to be equipped with an ejection mechanism under the table to meet the process requirements such as pressing the edge and ejecting the workpiece. In the existing technology, this ejection function is generally realized by an air cushion ejection mechanism. This type of mechanism relies on an air source to provide power and controls the air cushion's air intake and exhaust through a solenoid valve, thereby controlling the ejection and stationary actions of the air cushion.

[0004] However, the air cushion ejection mechanism has obvious limitations in practical applications: First, the response speed and control accuracy of the solenoid valve are limited, making it difficult to accurately match the dynamic process requirements of multi-station presses at different times and positions, and thus unable to achieve precise edge pressing and ejection under complex timing sequences; Second, the synchronization between the movement of the air cushion and the main movement of the press is difficult to guarantee, which can easily lead to insufficient workpiece stretching accuracy or poor demolding, affecting product quality; In addition, the air cushion system requires an air source, solenoid valves and pipelines, which not only has a complex structure and high equipment cost, but also has problems such as sealing maintenance and service life.

[0005] In summary, existing air cushion ejection mechanisms suffer from drawbacks such as insufficient control flexibility, poor synchronization, complex structure, and high maintenance costs. Therefore, there is an urgent need to develop an ejection mechanism with a simpler structure, more precise control, and better synchronization to meet the multi-station production needs of precision stamped parts such as new energy vehicle battery casings. Summary of the Invention

[0006] To address the aforementioned problems, this paper proposes a cam ejection mechanism for a multi-station press. The mechanism includes a sprocket, crankshaft, machine body, angler, universal coupling, transition table, bevel gear set, drive shaft, cam, worktable, ejector rod, spring, upper fixed plate, screw, lower fixed plate, and copper sleeve. The sprocket includes a crankshaft sprocket and an angler sprocket. The crankshaft sprocket is keyed to the front end of the crankshaft, and the angler sprocket is connected to the crankshaft sprocket via a chain. An angler is mounted on the left side of the machine body, with an angler sprocket at one end and a universal coupling at the other end. The bottom end of the universal coupling connects to the upper end of the transition table, and the bottom end of the transition table connects to the bevel gear set. A bevel gear set is connected to a drive shaft, and the drive shaft is equipped with several cams corresponding to each workstation position. The axial center of the cams is aligned with the center of the holes provided in the worktable. A circular top plate and a push rod are installed in the holes provided in the worktable. The upper end of the push rod is connected to the circular top plate, and a spring is sleeved in the middle of the push rod. The upper fixed plate is located below the worktable, and the lower fixed plate is connected to the upper fixed plate by a screw. Both the upper and lower fixed plates are equipped with copper sleeves. Through the integrated design of the mechanical transmission structure, the complex pneumatic components such as air pumps and solenoid valves required by traditional air cushion ejection mechanisms are eliminated, reducing failure points and maintenance costs. At the same time, the risk of air leakage in the pneumatic system is avoided, and the stability and reliability of the mechanism operation are improved.

[0007] The crankshaft and drive shaft move synchronously. Through the zero-delay synchronous operation of the crankshaft and drive shaft, the action of the cam-driven push rod is precisely matched with the stamping action of the punch press. This solves the response lag problem caused by the reliance on air pressure transmission in traditional air cushions and meets the process sequence requirements of multi-station presses at different times.

[0008] The drive shaft is mounted on the base of the machine body. The drive shaft is supported by a sliding bearing between itself and the pre-drilled hole in the machine body. The right end of the drive shaft is fixed to the lower right side of the machine body, and the left end of the drive shaft is connected to the lower end of the adapter through a bevel gear set. The support of the sliding bearing and the fixed design at both ends ensure the coaxiality and stability of the drive shaft during high-speed operation, avoiding axial movement or deviation during transmission. At the same time, the bevel gear set realizes the vertical steering transmission of power, adapts to the spatial layout of the machine body, and improves the installation adaptability of the mechanism.

[0009] The worktable has several holes, and the number of holes on the worktable is the same as the number of cams. By setting a one-to-one correspondence between the holes and the cams, it is ensured that each cam can accurately drive the corresponding push rod through the hole to complete the ejection action, thereby realizing the ejection control of each station.

[0010] The size of the circular top plate is matched with the size of the holes in the worktable, and the holes in the circular top plate and the worktable are fitted with clearance. The working surface of the circular top plate is treated with a quenching process. The clearance fit design reduces the friction between the top plate and the worktable, while the quenching treatment improves the hardness and wear resistance of the working surface of the top plate, extends the service life of the parts, and ensures the smoothness of the ejection action, avoiding the impact of friction jamming on process accuracy.

[0011] The push rod and the circular top plate are detachably connected by threads. The push rod passes through the copper sleeve and slides up and down along the copper sleeve. The two ends of the spring abut against the upper fixed plate and the lower fixed plate, respectively. The upper fixed plate and the lower fixed plate are fixed during the operation of the mechanism. The detachable connection by threads facilitates quick replacement and maintenance of the push rod and the circular top plate. The copper sleeve provides precise guidance for the push rod, ensuring the straightness of the up and down sliding. The elastic abutment design of the spring realizes the automatic reset of the push rod without the need for additional driving components. This simplifies the structure while ensuring the continuity and reliability of the pushing and lowering actions.

[0012] Beneficial effects:

[0013] By integrating the mechanical transmission structure, the complex pneumatic components such as air pumps and solenoid valves required by traditional air cushion ejection mechanisms are eliminated, reducing failure points and maintenance costs. At the same time, the risk of air leakage in the pneumatic system is avoided, improving the stability and reliability of the mechanism's operation.

[0014] By ensuring the synchronous operation of the crankshaft and drive shaft without delay, the action of the cam-driven push rod is precisely matched with the stamping action of the punch press, which solves the response lag problem caused by the reliance on air pressure transmission in traditional air cushions and meets the process sequence requirements of multi-station presses at different times.

[0015] The support of sliding bearings and the fixed design at both ends ensure the coaxiality and stability of the drive shaft during high-speed operation, avoiding axial movement or deviation during transmission. At the same time, the bevel gear set realizes the vertical steering transmission of power, adapts to the machine body space layout, and improves the installation adaptability of the mechanism.

[0016] By setting a one-to-one correspondence between holes and cams, it is ensured that each cam can accurately drive the corresponding push rod through the hole to complete the ejection action, thereby realizing ejection control at each station.

[0017] The clearance fit design reduces the motion friction between the top plate and the worktable, while the quenching treatment improves the hardness and wear resistance of the top plate's working surface, extending the service life of the components. At the same time, it ensures the smoothness of the ejection action and avoids affecting the process accuracy due to friction jamming.

[0018] The threaded detachable connection facilitates quick replacement and maintenance of the push rod and the circular top plate. The copper sleeve provides precise guidance for the push rod, ensuring the straightness of its up and down sliding. The elastic spring abutment design enables the push rod to automatically reset without the need for additional drive components. This simplifies the structure while ensuring the continuity and reliability of the push-out and descent actions. Attached Figure Description

[0019] Figure 1 This is a front view of a cam ejection mechanism for a multi-station press.

[0020] Figure 2 This is a side view of a cam ejection mechanism in a multi-station press;

[0021] Figure 3 This is a cross-sectional view of the crankshaft and the angler of the cam ejection mechanism of a multi-station press;

[0022] Figure 4 This is a sectional view of the cam ejection structure of a cam ejection mechanism for a multi-station press;

[0023] In the diagram: 1. Crankshaft, 201. Crankshaft sprocket, 202. Angle switch sprocket, 3. Machine body, 4. Angle switch, 5. Universal coupling, 6. Drive shaft, 7. Bevel gear set, 8. Cam, 9. Worktable, 10. Push rod, 11. Spring, 12. Transfer table, 13. Upper fixed plate, 14. Screw, 15. Lower fixed plate, 16. Copper sleeve, 17. Circular top plate. Detailed Implementation

[0024] To enhance understanding of the present invention, the invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only for explaining the invention and do not constitute a limitation on the scope of protection of the invention.

[0025] Crankshaft 1, crankshaft sprocket 201, angler sprocket 202, machine body 3, angler 4, universal coupling 5, drive shaft 6, bevel gear set 7, cam 8, worktable 9, push rod 10, spring 11, transfer table 12, upper fixed plate 13, screw 14, lower fixed plate 15, copper sleeve 16, circular top plate 17.

[0026] like Figure 1 , 2 As shown in Figures 3 and 4;

[0027] A cam ejection mechanism for a multi-station press includes a sprocket, crankshaft 1, machine body 3, angler 4, universal coupling 5, adapter 12, bevel gear set 7, drive shaft 6, cam 8, worktable 9, ejector rod 10, spring 11, upper fixed plate 13, screw 14, lower fixed plate 15, and copper sleeve 16. The sprocket includes a crankshaft sprocket 201 and an angler sprocket 202. The crankshaft sprocket 201 is keyed to the front end of the crankshaft 1, and the angler sprocket 202 is connected to the crankshaft sprocket 201 via a chain. A rotating... Angle device 4, one end of which is equipped with an angle device sprocket 202, and the other end of which is equipped with a universal coupling 5. The bottom end of the universal coupling 5 is connected to the upper end of the adapter 12, and the bottom end of the adapter 12 is connected to the bevel gear set 7. The bevel gear set 7 is connected to the drive shaft 6. The drive shaft 6 is equipped with a plurality of cams 8 corresponding to each workstation position. The axial center of the cams 8 is aligned with the center of the holes provided in the worktable 9. A circular top plate 17 and a push rod 10 are installed in the holes provided in the worktable 9. The upper end of the push rod 10 is connected to the circular top plate 17. 7. A spring 11 is sleeved in the middle of the top rod 10. The upper fixing plate 13 is located below the worktable 9. The lower fixing plate 15 is connected to the upper fixing plate 13 by a screw 14. Both the upper fixing plate 13 and the lower fixing plate 15 are equipped with copper sleeves 16. The crankshaft 1 and the drive shaft 6 move synchronously. The drive shaft 6 is installed on the base of the machine body 3. The drive shaft 6 is supported by a sliding bearing between itself and the preset hole of the machine body 3. The right end of the drive shaft 6 is fixed to the lower right side of the machine body 3. The left end of the drive shaft 6 is connected to the lower end of the transfer table 12 through a bevel gear set 7. The worktable 9 is provided with several The number of holes in the worktable 9 is the same as the number of holes in the cam 8. The size of the circular top plate 17 is adapted to the size of the holes in the worktable 9, and the circular top plate 17 and the holes in the worktable 9 are fitted with clearance. The working surface of the circular top plate 17 is treated with a quenching process. The push rod 10 is detachably connected to the circular top plate 17 by threads. The push rod 10 passes through the copper sleeve 16 and slides up and down along the copper sleeve 16. The two ends of the spring 11 abut against the upper fixed plate 13 and the lower fixed plate 15 respectively. The upper fixed plate 13 and the lower fixed plate 15 are fixed during the operation of the mechanism.

[0028] Implementation example;

[0029] When the multi-station press is started, the crankshaft 1 rotates, which drives the crankshaft sprocket 201 and chain to drive the corner sprocket 202 to rotate synchronously, thereby driving the corner 4 to operate. The universal coupling 5 at the output end of the corner 4 transmits power to the transfer table 12. The transfer table 12 drives the bevel gear set 7 to rotate, driving the transmission shaft 6 to rotate synchronously with the crankshaft 1. The cam 8 on the transmission shaft 6 rotates synchronously with the transmission shaft 6. The profile surface of the cam 8 contacts the bottom end of the push rod 10. During the push stroke of the cam 8, the push rod 10 slides up and down along the copper sleeve 16, driving the circular top plate 17 to achieve the actions of ejection, stationary, and descent. With the reset action of the spring 11, the multi-station stamping, stretching, and unloading processes are completed.

[0030] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A cam ejection mechanism for a multi-station press, characterized in that, The mechanism includes a sprocket, crankshaft, machine body, angler, universal coupling, adapter, bevel gear set, drive shaft, cam, worktable, push rod, spring, upper fixed plate, screw, lower fixed plate, and copper sleeve. The sprocket includes a crankshaft sprocket and an angler sprocket. The crankshaft sprocket is keyed to the front end of the crankshaft. The angler sprocket is connected to the crankshaft sprocket via a chain. An angler is mounted on the left side of the machine body. An angler sprocket is mounted at one end of the angler, and a universal coupling is mounted at the other end of the angler. The bottom end of the universal coupling... The upper end of the adapter is connected to the top end of the adapter, the bottom end of the adapter is connected to the bevel gear set, the bevel gear set is connected to the drive shaft, and the drive shaft is equipped with several cams corresponding to each workstation position. The axial center of the cams is aligned with the center of the holes provided in the worktable. A circular top plate and a push rod are installed in the holes provided in the worktable. The upper end of the push rod is connected to the circular top plate, and a spring is sleeved in the middle of the push rod. The upper fixing plate is located below the worktable, and the lower fixing plate is connected to the upper fixing plate by a screw. Both the upper fixing plate and the lower fixing plate are equipped with copper sleeves.

2. The cam ejection mechanism for a multi-station press according to claim 1, characterized in that, The crankshaft and drive shaft move synchronously.

3. The cam ejection mechanism for a multi-station press according to claim 1, characterized in that, The drive shaft is mounted on the base of the machine body. The drive shaft is supported by a sliding bearing between itself and a pre-set hole in the machine body. The right end of the drive shaft is fixed to the lower right side of the machine body, and the left end of the drive shaft is connected to the lower end of the transfer table through a bevel gear set.

4. The cam ejection mechanism for a multi-station press according to claim 1, characterized in that, The worktable has several holes, and the number of holes in the worktable is the same as the number of cams.

5. The cam ejection mechanism for a multi-station press according to claim 1, characterized in that, The dimensions of the circular top plate are adapted to the dimensions of the holes in the worktable, and the circular top plate and the holes in the worktable are fitted with a clearance fit. The working surface of the circular top plate is treated with a quenching process.

6. The cam ejection mechanism for a multi-station press according to claim 1, characterized in that, The top rod and the circular top plate are detachably connected by threads. The top rod passes through the copper sleeve and slides up and down along the copper sleeve. The two ends of the spring abut against the upper fixed plate and the lower fixed plate, respectively. The upper fixed plate and the lower fixed plate remain fixed during the operation of the mechanism.

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