Clamping mechanism and stamping device

Abstract

The utility model relates to a clamping mechanism and a stamping device, the clamping mechanism comprises two opening and closing arms, two roller devices, two push rod devices and an elastic device, one ends of the two opening and closing arms are oppositely arranged, and the other end of each opening and closing arm is provided with a rotating shaft; each roller device is mounted on one opening and closing arm; each roller device is slidably connected with a push rod device, the two push rod devices are arranged in the direction forming an included angle with the roller devices, and the two push rod devices synchronously move in the length direction to drive the roller devices and the opening and closing arm to integrally swing around the rotating shaft; and the elastic device is connected with the two opening and closing arms. The two opening and closing arms clamp the two sides of a workpiece more stably, tensioning and resetting of the two opening and closing arms are achieved through the springs, operation of the opening and closing arms on the two sides is more synchronous, clamping force distribution is more uniform, deformation of the workpiece in the follow-up stamping process is avoided, and the stamping quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of clamping mechanisms, and in particular to a clamping mechanism and a stamping device. Background Art

[0002] Traditional stamping devices usually perform direct stamping, and sometimes the workpiece and the stamping device are not aligned, which can lead to various problems with the stamped parts.

[0003] To address this problem, the prior art generally adopts a single-sided clamping or double-sided clamping method to fix the workpiece, but the above solutions all have some shortcomings.

[0004] Single-sided clamping is less stable. Since the clamping force only acts on one side of the workpiece, it can easily cause the workpiece to tilt, slide, or loosen during the stamping process, affecting the stamping quality. This type of single-sided clamping has high requirements for the workpiece shape, requiring the workpiece to have sufficient rigidity and stability to ensure stability during the stamping process. It also has certain restrictions on the shape and size of the workpiece.

[0005] The existing double-sided clamping mechanism is generally complex in structure, making it difficult to achieve synchronous clamping. The clamping force of the double-sided clamping is unevenly distributed, which can easily cause the workpiece to deform during the stamping process, affecting the stamping quality. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this application is to provide a clamping mechanism and a stamping device, which have a relatively simple structure and can achieve stable and synchronous clamping.

[0007] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0008] A clamping mechanism comprises two opening and closing arms, one ends of the two opening and closing arms are arranged opposite to each other, and the other end of each opening and closing arm is provided with a rotating shaft.

[0009] The clamping mechanism further comprises two roller devices, each of which is mounted on one of the opening and closing arms.

[0010] The clamping mechanism also includes two push rod devices, each of the roller devices is slidably connected to a push rod device, the two push rod devices are arranged in a direction having an angle with the roller device, and the two push rod devices move synchronously along their length directions to drive the roller device and the opening and closing arm as a whole to swing around the rotating shaft.

[0011] The clamping mechanism further comprises an elastic device, which connects the two opening and closing arms.

[0012] By adopting the above technical solution, the two opening and closing arms can achieve precise synchronous movement through the roller device and the push rod device, thereby realizing clamping on both sides; the two opening and closing arms are connected by an elastic device for reset, and can effectively offset the vibration and impact during the movement, thereby improving the stability of the clamped workpiece and preventing the workpiece from shifting or loosening during the stamping process.

[0013] The present application is further configured such that the push rod device moves in a direction tangential to the outer side of the roller device, the push rod device has an inclined surface, and the roller device can slide through the inclined surface.

[0014] The present application is further configured such that the clamping mechanism also includes a retaining wheel device provided at the lower end of each of the push rod devices and a sleeve device provided at the upper end of each of the push rod devices, each of the retaining wheels includes two oppositely arranged guide wheels, the two guide wheels can slide against the two sides of the lower end of the push rod device, and the upper end of the push rod device is sleeved in the sleeve device.

[0015] The present application is further configured such that the two opening and closing arms are provided with a plurality of claws arranged in pairs and facing each other.

[0016] A stamping device comprises the above-mentioned clamping mechanism, and further comprises a die-casting device, wherein the die-casting device is arranged above between the two opening and closing arms.

[0017] The present application is further configured such that the stamping device also includes an upper template and a lower template, the die-casting device and the sleeve device are both installed on the upper template, the roller device and the retaining wheel device are both provided on the lower template, and the push rod device passes through the lower template.

[0018] The present application is further configured such that the opening and closing arm is provided with a plurality of clamping stations arranged in sequence, the opening and closing arm reciprocates along the direction in which the clamping stations are arranged, and the die-casting device is provided with a die-casting station corresponding to each of the clamping stations.

[0019] The present application is further configured such that the stamping device further includes a workpiece placement belt, which is arranged between the two opening and closing arms, and the workpiece placement belt intermittently moves along the setting direction of the clamping station.

[0020] The present application is further configured such that a plurality of induction switches are provided on the workpiece placement belt.

[0021] The present application is further configured such that the stamping device further includes a loading frame, which is arranged at the front end of the die-casting device, and the loading frame is arranged above the workpiece placement belt, and there is a gap between the loading frame and the workpiece placement belt.

[0022] In summary, the beneficial technical effects of this application are:

[0023] 1. The two opening and closing arms of the present application achieve efficient clamping action through the synchronous movement of the roller device and the push rod device, and can clamp the target object quickly and stably.

[0024] 2. The two opening and closing arms of the present application clamp the workpiece on both sides, which is more stable, simple in structure and low in cost. Springs are used to tighten and reset the two opening and closing arms, making the operation of the opening and closing arms on both sides more synchronized and the clamping force more evenly distributed, thereby avoiding deformation of the workpiece in the subsequent stamping process and ensuring the stamping quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the opening and closing arm in the state of locking the workpiece.

[0026] Figure 2 This is a schematic diagram of the opening and closing arm when the workpiece is released.

[0027] Figure 3 It is a schematic diagram of the reciprocating push mechanism.

[0028] Figure 4 It is a side view of the reciprocating pushing mechanism.

[0029] Figure 5 It is an axonometric view of the stamping device.

[0030] Figure 6 is a schematic diagram of an inductive switch.

[0031] Figure 7 It is a top view of the workpiece placement belt.

[0032] Explanation of the accompanying symbols: 1. opening and closing arm; 11. rotating shaft; 12. holding claw; 2. roller device; 3. push rod device; 31. inclined plane; 32. first plane; 33. second plane; 4. elastic device; 5. holding wheel device; 51. guide wheel; 6. sleeve device; 7. die-casting device; 8. upper template; 9. lower template; 10. workpiece placement belt; 101. induction switch; 102. loading frame; 103. reciprocating pushing mechanism; 103a. cam; 103b. rocker mechanism. DETAILED DESCRIPTION

[0033] The present application is further described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 3As shown, a clamping mechanism includes two opening and closing arms 1, two roller devices 2, two push rod devices 3 and an elastic device 4, one end of the two opening and closing arms 1 is arranged opposite to each other, and the other end of each opening and closing arm 1 is provided with a rotating shaft 11; each roller device 2 is respectively installed on an opening and closing arm 1; each roller device 2 is slidably connected to a push rod device 3, and the two push rod devices 3 are arranged in a direction having an angle with the roller device 2, and the two push rod devices 3 move synchronously along their length direction to drive the roller device 2 and the opening and closing arm 1 as a whole to swing around the rotating shaft 11; the elastic device 4 connects the two opening and closing arms 1.

[0035] In a preferred embodiment, there is an angle between the push rod device 3 and the roller device 2, the push rod device 3 is tilted, and the push rod device 3 moves in the direction of the angle with the roller device 2, that is, the length direction of the push rod device 3, thereby causing the roller device 2 to deflect, and the roller device 2 and the opening and closing arm 1 are fixedly connected, so that the roller device 2 and the opening and closing arm 1 swing around the rotating shaft 11.

[0036] In another preferred embodiment, the included angle between the push rod device 3 and the roller device 2 is 90 degrees, the push rod device 3 is vertically arranged, and the push rod device 3 moves along the direction having the included angle with the roller device 2, that is, the length direction of the push rod device 3. In other words, along Figure 1 and Figure 2 The push rod device 3 moves in the up and down direction, and the push rod device 3 moves in the direction tangential to the outer side of the roller device 2. The direction tangential to the outer side of the roller device 2 is Figure 1 On the side opposite to the elastic device 4, the push rod device 3 has an inclined surface 31, and the roller device 2 can slide through the inclined surface 31. The roller device 2 rolls on the inclined surface 31, thereby causing the roller device 2 to deflect. The roller device 2 and the opening and closing arm 1 are fixedly connected, so that the roller device 2 and the opening and closing arm 1 swing around the rotating shaft 11.

[0037] Furthermore, the push rod device 3 also has a first plane 32 and a second plane 33, which are respectively connected to the two ends of the inclined plane 31. The roller device 2 rolls from the first plane 32 through the inclined plane 31 to the second plane 33, thereby realizing the swing of the opening and closing arm 1 around the rotating shaft 11.

[0038] The design of the inclined surface 31 of the push rod device 3 can effectively control the deflection angle of the roller device 2. By adjusting the angle and length of the inclined surface 31, the opening and closing angle of the clamping mechanism can be precisely controlled. The roller device 2 rolls from the first plane 32 to the second plane 33 through the inclined surface 31, realizing the swinging of the opening and closing arm 1 around the rotating shaft 11, simplifying the movement path and improving the movement efficiency. The roller device 2 rolls on the inclined surface 31, achieving a smooth transition during the movement process, reducing noise and vibration during the movement process, and improving the working reliability of the clamping mechanism. Compared with the inclined setting of the push rod device 3, the vertical setting of the push rod device 3 can save more space and is more suitable for use under conditions of limited space.

[0039] It is worth noting that the two push rod devices 3 move synchronously along their length direction to achieve synchronous clamping of the opening and closing arm 1 on both sides of the workpiece. The preferred method for achieving synchronous movement can be electrical control, such as a servo motor. Through motor control, the two push rods can achieve precise and synchronous linear movement; such as a stepper motor. Using stepper motor control, precise and synchronous stepping movement can be achieved; such as a linear motor. Using linear motor control, high-precision and high-speed synchronous linear movement can be achieved; such as a synchronous control system. Sensors are used to monitor the position information of the two push rods, and synchronous movement is achieved through the control system. The preferred method for achieving synchronous movement can be mechanical connection, such as gear transmission. A rack structure is set on the two push rod devices 3, and the two racks cooperate with a gear to achieve synchronous movement.

[0040] The two push rod devices 3 move synchronously along their length, enabling the opening and closing arms 1 to simultaneously clamp both sides of the workpiece, ensuring even distribution of the clamping force and preventing deformation or damage to the workpiece. Through electrical control or mechanical connection, the movement of the push rod devices 3 can be precisely controlled, thereby enabling precise adjustment of the clamping force. The angle between the push rod device 3 and the roller device 2 is adjustable and can be flexibly adjusted according to the size and shape of the workpiece to meet the clamping requirements of different workpieces. The elastic device 4 can effectively buffer the impact force during the clamping process, improving the stability and reliability of the clamping mechanism. The clamping mechanism has a simple structure, is easy to operate, and is easy to maintain.

[0041] The clamping mechanism also includes a retaining wheel device 5 provided at the lower end of each push rod device 3 and a sleeve device 6 provided at the upper end of each push rod device 3. Each retaining wheel includes two oppositely arranged guide wheels 51. The two guide wheels 51 can be slidably pressed against the two sides of the lower end of the push rod device 3. The upper end of the push rod device 3 is sleeved in the sleeve device 6.

[0042] The retaining wheel assembly 5 provides stable support for the lower end of the push rod assembly 3 via two guide wheels 51, preventing the push rod assembly 3 from shaking or deflecting during movement, thereby improving the stability of the push rod assembly 3. The sleeve assembly 6 secures the upper end of the push rod assembly 3, ensuring that the push rod assembly 3 maintains a consistent direction of movement, reducing errors in the push rod assembly 3 during movement, and improving the movement accuracy of the clamping mechanism. The sleeve assembly 6 effectively protects the upper end of the push rod assembly 3 from wear or impact from the external environment, thereby extending the service life of the push rod assembly 3. Since the upper and lower ends of the push rod assembly 3 are respectively secured by the sleeve assembly 6 and the retaining wheel assembly 5, the push rod assembly 3 can be easily maintained and replaced, reducing maintenance costs. The coordination of the retaining wheel assembly 5 and the sleeve assembly 6 effectively reduces the friction of the push rod assembly 3 during movement, reduces noise and vibration, and improves the smoothness of the movement process. The retaining wheel assembly 5 and the sleeve assembly 6 are compactly designed and do not take up too much space, which helps to improve the space utilization of the clamping mechanism.

[0043] Preferably, the elastic device 4 can be made of rubber elastic body; more preferably, Figure 1 As shown, the elastic device 4 can be a wire spring or a spring.

[0044] like Figure 2 As shown, the roller device 2 includes a base and a roller. The roller is installed on the base. The base is fixedly connected to the opening and closing arm 1. The base and the opening and closing arm 1 swing around the rotating shaft 11. The roller and the push rod are in rolling contact.

[0045] The two opening and closing arms 1 have a plurality of claws 12 arranged in pairs and facing each other. Specifically, any claw 12 of one opening and closing arm 1 has a claw 12 on the other opening and closing arm 1 that is paired and arranged opposite to it.

[0046] The gripping claws 12 securely hold the clamped object, preventing it from slipping or falling during the clamping process and improving clamping stability. The gripping claws 12 can be designed to suit the shape of the clamped object. For example, they can be designed in straight, curved, or concave / convex shapes to accommodate workpieces of varying shapes. Multiple gripping claws 12 can be designed based on the size of the clamped workpiece to achieve more precise positioning and improve clamping accuracy.

[0047] like Figures 4 to 7 As shown, a stamping device includes the above-mentioned clamping mechanism and a die-casting device 7, which is arranged above and between two opening and closing arms 1. A plurality of claws 12 arranged in pairs on the opening and closing arms 1 form clamping stations arranged in sequence. The opening and closing arms 1 move back and forth along the direction in which the clamping stations are arranged. The die-casting device 7 has a die-casting station corresponding to each clamping station.

[0048] The punching device further includes a workpiece placement belt 10 , which is disposed between the two opening and closing arms 1 , and intermittently moves along a direction in which the clamping stations are disposed.

[0049] Preferably, the opening and closing arm 1 moves back and forth along the direction in which the clamping station is set. A linear motor can be used to drive the slider to perform linear reciprocating motion using electromagnetic force. This has high speed and high precision, but is costly and has a more complex structure. A stepper motor and lead screw combination can be used to use the rotational motion of the stepper motor to drive the lead screw to perform linear reciprocating motion. This has a slower speed but higher precision and lower cost. A servo motor and lead screw can be used to use the rotational motion of the servo motor to drive the lead screw to perform linear reciprocating motion. This has high speed and high precision, but is costly.

[0050] Preferably, the opening and closing arm 1 moves back and forth along the direction in which the clamping station is set, and the Figures 4 and 5 The reciprocating push mechanism 103 shown includes a cam 103a and a rocker mechanism 103b. The rotation of the cam 103a causes the rocker in the rocker mechanism 103b to swing, and the rocker, through a connecting mechanism in the rocker mechanism 103b, drives the slider to perform linear reciprocating motion. Combining the flexibility of the cam 103a with the simplicity of the rocker mechanism 103b, more complex linear reciprocating motion paths can be achieved.

[0051] The workpiece placement belt 10 may have a structure similar to a conveyor belt.

[0052] Furthermore, the opening and closing arm 1 moves back and forth along the setting direction of the clamping station, and the workpiece placement belt 10 moves intermittently along the setting direction of the clamping station. The specific clamping operation process is that there are multiple claws 12 on the opening and closing arm 1, among which the first pair of claws 12 clamp the first workpiece, and the opening and closing arm 1 clamps the workpiece and moves to the rear end. At the same time, the workpiece placement belt 10 also supports the workpiece and moves synchronously in the same direction, driving the workpiece to enter the first die-casting station for die-casting, and then the opening and closing arm 1 clamps the workpiece and moves to the front end, the first pair of claws 12 clamps the second workpiece, and the second pair of claws 12 clamps the first workpiece. At this time, the workpiece placement belt 10 stops, and then the opening and closing arm 1 and the workpiece placement belt 10 move synchronously to the rear end again, and the first workpiece enters the second die-casting station for die-casting. Figure 7 As shown, this process continues until the last die casting station is completed and the first workpiece is transported to the next process.

[0053] The front end and back end mentioned above refer to the order of relative processes, for example Figure 7 If the process on the left is performed before the process on the right, the process on the left is the front end and the process on the right is the back end, that is, Figure 7 Moving to the left means moving toward the front end, and moving to the right means moving toward the rear end.

[0054] The use of multiple clamping and die-casting stations, along with the intermittent movement of the workpiece placement belt 10, enables continuous workpiece conveying and die-casting, effectively improving production efficiency and reducing process changeover time. The synchronized movement of the opening and closing arm 1 and the workpiece placement belt 10 enables automated clamping, conveying, and die-casting of workpieces, reducing manual operations and labor intensity, and enhancing the automation level of the production line. Precisely controlling the movement of the opening and closing arm 1 and the workpiece placement belt 10, along with the use of appropriate clamping and die-casting mechanisms, allows for precise positioning and die-casting of workpieces, improving product quality and consistency.

[0055] The punching device also includes an upper template 8 and a lower template 9. The die-casting device 7 and the sleeve device 6 are both installed on the upper template 8. The roller device 2 and the retaining wheel device 5 are both provided on the lower template 9. The push rod device 3 passes through the lower template 9.

[0056] When the upper template 8 is pressed down, the sleeve device 6 drives the push rod to press down, and then drives the roller to drive the opening and closing arm 1 to swing, forming Figure 1 Exercise to Figure 2 During the die-casting process, the claws 12 are opened and the die-casting device 7 is also installed on the upper template 8, which just realizes the die-casting operation. The claws 12 and the opening and closing arm 1 play a centering role without interfering with the die-casting operation.

[0057] It is worth noting that the die-casting device 7 realizes the die-casting of the workpiece. According to the needs, various types of devices for realizing the die-casting operation can be selected, such as the die-casting device in the Chinese invention disclosure document die-casting mold and die-casting device with publication number CN106903286A. This example is only used to illustrate that the die-casting device 7 is a conventional technical means in this field.

[0058] Furthermore, the workpiece placement belt 10 is provided with a plurality of induction switches 101, such as Figure 6 and Figure 7 As shown, the workpiece placement belt 10 has multiple workpiece placement stations, and the workpiece is placed in the workpiece placement station. When the workpiece placement station is moved to the die-casting station for die-casting, the induction switch 101 is used to determine the relative position of the workpiece placement station and the die-casting station. Induction switches 101 are provided on both sides of each workpiece placement station.

[0059] Preferably, the die-casting device 7 is provided with a laser emitting device, and the induction switch 101 receives the laser, and receiving the laser indicates that the die-casting station has been reached.

[0060] By detecting the relative position of the workpiece placement station and the die-casting station, the sensor switch 101 ensures that the workpiece is accurately placed in the die-casting mold, avoiding die-casting defects caused by positioning deviations, such as gate offset and substandard product dimensions. Accurate positioning can increase die-casting speed and reduce production cycle delays caused by repeated positioning adjustments.

[0061] The induction switch 101 can provide real-time feedback on the workpiece's position, providing accurate signals to the automated control system, enabling automated control, reducing manual intervention, and improving production efficiency. It can be integrated with automated equipment such as robots to implement more complex automated production lines, further improving production efficiency.

[0062] The induction switch 101 can monitor the movement status of the workpiece placement station and the die-casting station to prevent the workpiece from accidentally falling off during the movement, thereby improving production safety.

[0063] When the workpiece is not placed in place or is in the wrong position, the induction switch 101 can sound an alarm to remind the operator to make adjustments to avoid safety accidents during the die-casting process.

[0064] The design of the induction switch 101 can simplify traditional positioning methods, such as manual visual inspection or mechanical fixtures, thereby reducing production costs and improving production efficiency.

[0065] The stamping device also includes a loading frame 102, which is arranged at the front end of the die-casting device 7. The loading frame 102 is arranged above the workpiece placement belt 10. There is a gap between the loading frame 102 and the workpiece placement belt 10. When the workpiece placement station is facing the loading frame 102, a workpiece is released from the loading frame 102 to the workpiece placement station, and the workpiece placement belt 10 drives the workpiece to move. The gap between the loading frame 102 and the workpiece placement belt 10 is used for the workpiece to pass through.

[0066] The loading frame 102 automatically transports workpieces to the workpiece placement belt 10, eliminating the need for manual placement. This significantly increases loading speed, reduces manual operation time, and improves production efficiency. Automatic loading reduces the workload of workers handling workpieces, improves the working environment, and enhances work efficiency. The loading frame 102 ensures that workpieces are positioned correctly on the workpiece placement belt 10, avoiding deviations caused by manual operation and improving product quality consistency.

[0067] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A clamping mechanism, characterized in that: include, Two opening and closing arms (1), one end of the two opening and closing arms (1) being arranged opposite to each other, and the other end of each opening and closing arm (1) being provided with a rotating shaft (11); Two roller devices (2), each of the roller devices (2) is mounted on one of the opening and closing arms (1); Two push rod devices (3), each of the roller devices (2) is slidably connected to one of the push rod devices (3), the two push rod devices (3) are arranged along a direction having an included angle with the roller device (2), and the two push rod devices (3) move synchronously along their length directions to drive the roller device (2) and the opening and closing arm (1) to swing around the rotating shaft (11) as a whole; An elastic device (4), wherein the elastic device (4) connects the two opening and closing arms (1).

2. The clamping mechanism according to claim 1, characterized in that: The push rod device (3) moves in a direction tangential to the outer side of the roller device (2). The push rod device (3) is provided with an inclined surface (31), and the roller device (2) can slide through the inclined surface (31).

3. The clamping mechanism according to claim 2, characterized in that: It also includes a retaining wheel device (5) provided at the lower end of each of the push rod devices (3) and a sleeve device (6) provided at the upper end of each of the push rod devices (3), each of the retaining wheels includes two guide wheels (51) arranged opposite to each other, the two guide wheels (51) can be slidably pressed against the two sides of the lower end of the push rod device (3), and the upper end of the push rod device (3) is sleeved in the sleeve device (6).

4. The clamping mechanism according to claim 1, wherein: The two opening and closing arms (1) are provided with a plurality of claws (12) arranged in pairs and facing each other.

5. A stamping device comprising the clamping mechanism according to claim 3, characterized in that: It also includes a die-casting device (7), which is arranged above the two opening and closing arms (1).

6. The punching device according to claim 5, characterized in that It also includes an upper template (8) and a lower template (9), the die-casting device (7) and the sleeve device (6) are both installed on the upper template (8), the roller device (2) and the retaining wheel device (5) are both arranged on the lower template (9), and the push rod device (3) passes through the lower template (9).

7. The punching device according to claim 6, characterized in that The opening and closing arm (1) has a plurality of clamping stations arranged in sequence, the opening and closing arm (1) moves back and forth along the direction in which the clamping stations are arranged, and the die-casting device (7) has a die-casting station corresponding to each of the clamping stations.

8. The punching device according to claim 7, characterized in that It also includes a workpiece placement belt (10), which is arranged between the two opening and closing arms (1), and the workpiece placement belt (10) moves intermittently along the setting direction of the clamping station.

9. The punching device according to claim 8, characterized in that The workpiece placement belt (10) is provided with a plurality of induction switches (101).

10. The punching device according to claim 8, characterized in that It also includes a loading frame (102), which is arranged at the front end of the die-casting device (7), and is arranged above the workpiece placement belt (10), with a gap between the loading frame (102) and the workpiece placement belt (10).

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