Automatic die changing mechanism for cold heading machine

Abstract

The utility model provides cold header die automatic replacement mechanism relates to cold header die replacement technical field, the utility model discloses fixed installation nitrile rubber sucking disc on the bottom surface of negative pressure cylinder, the inside sliding joint of negative pressure cylinder has piston board, the surface fixed mounting of piston board has push away link, the one end fixed mounting of push away link away from piston board has the lifting plate, the both sides surface of negative pressure cylinder all fixed mounting has first fixed plate and second fixed plate first fixed plate's surface fixed mounting has first electric telescopic handle, second fixed plate's surface fixed mounting has second electric telescopic handle, the utility model discloses through adsorption clamping double fixed device, makes and utilizes the automatic collaborative action of negative pressure adsorption and mechanical clamping, need not manual intervention to change the mould link, solves the problem that traditional manual change mould leads to long equipment downtime and high security risk, guarantees the continuous operation of cold header automatic production line, improves equipment comprehensive utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of cold heading machine mold replacement technology, and in particular to an automatic mold replacement mechanism for cold heading machines. Background Technology

[0002] As a key piece of equipment for metal plastic forming, cold heading machines mainly produce standard fasteners such as bolts, nuts, and rivets through cold forging processes. They have advantages such as high production efficiency and high material utilization, and are widely used in industries such as automobiles, aerospace, and building hardware.

[0003] As a core piece of equipment in fastener production, the efficiency and stability of mold changing in cold heading machines directly affect production cycle and product quality. Traditional manual mold changing relies on operators to manually disassemble and assemble, which has the following significant drawbacks: firstly, it is inefficient; secondly, it poses a high safety risk, because the weight of molds is usually between five and twenty kilograms, and manual handling can easily lead to bumps or lumbar muscle strain. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned above in the background art by proposing an automatic mold changing mechanism for cold heading machines.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an automatic mold changing mechanism for a cold heading machine, comprising a negative pressure cylinder, mounting plates fixedly installed on both outer wall surfaces of the negative pressure cylinder, a double-fixing device for adsorption and clamping provided on the bottom surface of the negative pressure cylinder, the double-fixing device for adsorption and clamping including a nitrile rubber suction cup fixedly installed on the bottom surface of the negative pressure cylinder, a piston plate slidably connected inside the negative pressure cylinder, a push rod fixedly installed on the surface of the piston plate, a lifting plate fixedly installed at the end of the push rod away from the piston plate, a first fixing plate and a second fixing plate fixedly installed on both sides of the negative pressure cylinder, a first electric telescopic rod fixedly installed on the surface of the first fixing plate, a second electric telescopic rod fixedly installed on the surface of the second fixing plate, the output ends of the first electric telescopic rod and the second electric telescopic rod being fixedly connected to the lifting plate, and a mold positioning detection device provided inside the negative pressure cylinder, including a proximity switch installed on the cylinder wall for detecting the position of the piston plate and feeding back to the first PLC controller and the second PLC controller.

[0006] Preferably, a first extension rod is fixedly installed on both sides of the first fixing plate, and a second extension rod is fixedly installed on both sides of the second fixing plate, with a cross plate slidably connected between each of the first and second extension rods.

[0007] Preferably, a third electric telescopic rod is fixedly installed on both sides of the first fixing plate, and a fourth electric telescopic rod is fixedly installed on both sides of the second fixing plate. The output end of each of the third and fourth electric telescopic rods is fixedly connected to the cross plate.

[0008] Preferably, a U-shaped rod is fixedly installed on the surface of both cross plates, and an installation cylinder is inserted into the end of the U-shaped rod away from the cross plate. An arc-shaped clamping plate is fixedly installed on the end of the installation cylinder away from the U-shaped rod.

[0009] Preferably, a first PLC controller is fixedly installed on the side of the first fixing plate, and a second PLC controller is fixedly installed on the side of the second fixing plate.

[0010] Preferably, the first PLC controller is electrically connected to the first and third electric telescopic poles, and the second PLC controller is electrically connected to the second and fourth electric telescopic poles.

[0011] The effects achieved by the above components are as follows: through the automated coordinated action of negative pressure adsorption and mechanical clamping, no manual intervention is required in the mold changing process, which solves the problems of long equipment downtime and high safety risks caused by traditional manual mold changing, ensures the continuous operation of the automated cold heading machine production line, and improves the overall utilization rate of the equipment.

[0012] Preferably, the outer wall surface of the U-shaped rod is provided with an installation device, the installation device including an L-shaped insert plate fixedly installed on the outer wall surface of the U-shaped rod, a socket fixedly installed on the outer wall surface of the installation cylinder, the socket having a slot on its surface, and the end of the L-shaped insert plate away from the U-shaped rod being inserted into the slot.

[0013] Preferably, an extension plate is fixedly installed on the top surface of the socket, and bolts are threadedly connected to the surface of the extension plate. Threaded holes are provided on the surface of the horizontal end of the L-shaped plug plate.

[0014] The effect achieved by the above components is that the L-shaped plug-in plate and socket plug-in structure, fixed by bolts, enables the quick disassembly and installation of the arc-shaped clamping plate. By replacing the arc-shaped clamping plate with different curvatures or shapes, it can adapt to the clamping requirements of various mold specifications and improve the versatility of the device.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] In this invention, by setting up a dual fixing device of adsorption and clamping, the automated coordinated action of negative pressure adsorption and mechanical clamping is achieved, eliminating the need for manual intervention in the mold changing process. This solves the problems of long equipment downtime and high safety risks caused by traditional manual mold changing, ensuring the continuous operation of the automated cold heading machine production line and improving the overall utilization rate of the equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This utility model Figure 1 Another structural diagram from a different angle;

[0019] Figure 3 This is a schematic diagram of the internal structure of the negative pressure cylinder of this utility model;

[0020] Figure 4 This utility model Figure 1 A schematic diagram of the three-dimensional structure at point A in the middle.

[0021] Legend: 1. Negative pressure cylinder; 2. Adsorption clamping double fixing device; 201. Suction cup; 202. Piston plate; 203. Push rod; 204. Lifting plate; 205. First fixing plate; 206. Second fixing plate; 207. First electric telescopic rod; 208. Second electric telescopic rod; 209. First extension rod; 210. Second extension rod; 211. Cross plate; 212. U-shaped rod; 213. Mounting cylinder; 214. Arc-shaped clamping plate; 215. First PLC controller; 216. Second PLC controller; 217. Third electric telescopic rod; 218. Fourth electric telescopic rod; 3. Mounting device; 31. L-shaped insert plate; 32. Socket; 33. Slot; 34. Extension plate; 35. Bolt; 36. Threaded hole; 4. Mounting plate. Detailed Implementation

[0022] Example 1, such as Figure 1-4 As shown, the automatic mold changing mechanism of the cold heading machine includes a negative pressure cylinder 1. Mounting plates 4 are fixedly installed on both outer wall surfaces of the negative pressure cylinder 1. The negative pressure cylinder 1 is made of aluminum alloy, with an inner diameter of φ100mm and a height of 200mm.

[0023] Reference Figure 1-3As shown in this embodiment: the bottom surface of the negative pressure cylinder 1 is provided with a double-fixed adsorption clamping device 2. The double-fixed adsorption clamping device 2 includes a nitrile rubber suction cup 201 fixedly installed on the bottom surface of the negative pressure cylinder 1. A piston plate 202 is slidably connected inside the negative pressure cylinder 1. A push rod 203 is fixedly installed on the surface of the piston plate 202. A lifting plate 204 is fixedly installed at the end of the push rod 203 away from the piston plate 202. A first fixing plate 205 and a second fixing plate 206 are fixedly installed on both sides of the negative pressure cylinder 1. A first electric telescopic rod 207 is fixedly installed on the surface of the first fixing plate 205, and a second electric telescopic rod 208 is fixedly installed on the surface of the second fixing plate 206. The first electric telescopic rod 207 and... The output ends of the second electric telescopic rods 208 are all fixedly connected to the lifting plate 204. First extension rods 209 are fixedly installed on both sides of the first fixed plate 205, and second extension rods 210 are fixedly installed on both sides of the second fixed plate 206. A cross plate 211 is slidably connected between each first extension rod 209 and each second extension rod 210. Third electric telescopic rods 217 are fixedly installed on both sides of the first fixed plate 205, and fourth electric telescopic rods 218 are fixedly installed on both sides of the second fixed plate 206. The output ends of each third electric telescopic rod 217 and each fourth electric telescopic rod 218 are fixedly connected to the cross plate 211. U-shaped rods are fixedly installed on the surfaces of both cross plates 211. 212, an installation cylinder 213 is inserted into the end of the U-shaped rod 212 away from the cross plate 211. An arc-shaped clamping plate 214 is fixedly installed at the end of the installation cylinder 213 away from the U-shaped rod 212. A first PLC controller 215 is fixedly installed on the side of the first fixing plate 205, and a second PLC controller 216 is fixedly installed on the side of the second fixing plate 206. The first PLC controller 215 is electrically connected to the first electric telescopic rod 207 and the third electric telescopic rod 217. The second PLC controller 216 is electrically connected to the second electric telescopic rod 208 and the fourth electric telescopic rod 218. The negative pressure cylinder 1 is equipped with a mold positioning detection device, including a proximity switch installed on the cylinder wall of the negative pressure cylinder 1, for detecting... The position of piston plate 202 is measured and fed back to the first PLC controller 215 and the second PLC controller 216. The nitrile rubber suction cup 201 has a diameter of φ50mm, a Shore hardness of 50A, and an adsorption surface roughness ≤Ra3.2μm. The first PLC controller 215 and the second PLC controller 216 are both S7-200SMART. The piston plate 202 has a stroke of 50mm. An O-ring seal is used between the cylinder wall and the piston plate 202. The first electric telescopic rod 207, the second electric telescopic rod 208, the third electric telescopic rod 217, and the fourth electric telescopic rod 218 are all model JGC-TC-50. The drive power supply is DC24V, the maximum thrust is 100N, and the response time is ≤50ms.

[0024] Reference Figure 1-4As shown in this embodiment: the outer wall surface of the U-shaped rod 212 is provided with an installation device 3. The installation device 3 includes an L-shaped insert plate 31 fixedly installed on the outer wall surface of the U-shaped rod 212. A socket 32 ​​is fixedly installed on the outer wall surface of the installation cylinder 213. A slot 33 is opened on the surface of the socket 32. The end of the L-shaped insert plate 31 away from the U-shaped rod 212 is inserted into the slot 33. An extension plate 34 is fixedly installed on the top surface of the socket 32. A bolt 35 is threadedly connected to the surface of the extension plate 34. A threaded hole 36 is opened on the surface of the horizontal end of the L-shaped insert plate 31.

[0025] Working principle: When the device is needed, firstly, use the mounting plate 4 to fix the negative pressure cylinder 1 to the end of the external robotic arm with bolts, ensuring that the connection torque between the mounting plate 4 and the external robotic arm reaches 20 N·m. After installation, start the external robotic arm to move the device above the target mold. Adjust the position using the vision positioning system on the external robotic arm to align the center of the nitrile rubber suction cup 201 with the center of the top surface of the mold, ensuring that the suction cup 201 adheres to the mold surface. Then, trigger the linkage control program of the first PLC controller 215 and the second PLC controller 216. The first electric telescopic rod 207 and the second electric telescopic rod 208 start synchronously, moving the lifting plate 204 upward by 50mm at a speed of 50mm / s. This, in turn, pulls the piston plate 202 upward within the negative pressure cylinder 1 via the push rod 203, creating a negative pressure of -80kPa inside the cylinder. During this process, the proximity switch monitors the position of the piston plate 202 in real time. When the displacement reaches 50mm, the PLC controller confirms the formation of negative pressure. At this point, the φ50mm suction cup 201 generates an adsorption force of approximately 150N. Immediately afterwards, the third electric telescopic rod 217 and the fourth electric telescopic rod 218 start, moving upward by 30mm / s. The cross plate 211 is moved 30mm towards the center on the first extension rod 209 and the second extension rod 210, causing the U-shaped rod 212 and the arc-shaped clamping plate 214 to clamp the two sides of the mold. Then, the proximity switch feeds back the piston plate 202 positioning signal to the PLC controller. The external system prompts the external robotic arm to perform the handling action through audible and visual signals. At the same time, if the system detects a negative pressure value < -60kPa during the transfer process, the first PLC controller 215 and the second PLC controller will immediately trigger an alarm and lock the robotic arm's movement. Simultaneously, the overload protection of the first, second, third, and fourth electric telescopic rods will be activated. The device will cut off the power supply to prevent the mold from falling off and ensure the safety of the mold changing process. After the mold is moved, other robotic arms can be used to complete the installation of the new mold. When the fixture needs to be replaced, first use an Allen wrench to loosen the bolt 35 so that it is completely removed from the threaded hole 36. Then pull out the arc-shaped clamping plate 214 along the axial direction of the slot 33. At this time, the L-shaped insert plate 31 and the socket 32 ​​are separated, and the old fixture is disassembled. Next, align the socket 32 ​​of the new fixture with the L-shaped insert plate 31 and insert it 15mm to ensure that the slot 33 and the L-shaped insert plate 31 fit tightly. Finally, tighten the bolt 35 and add a spring washer to prevent loosening.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. An automatic mold changing mechanism for a cold heading machine, comprising a negative pressure cylinder (1), wherein mounting plates (4) are fixedly installed on both outer wall surfaces of the negative pressure cylinder (1), characterized in that: The bottom surface of the negative pressure cylinder (1) is provided with a double-fixed device (2) for adsorption and clamping. The double-fixed device (2) for adsorption and clamping includes a nitrile rubber suction cup (201) fixedly installed on the bottom surface of the negative pressure cylinder (1). A piston plate (202) is slidably connected inside the negative pressure cylinder (1). A push rod (203) is fixedly installed on the surface of the piston plate (202). A lifting plate (204) is fixedly installed at the end of the push rod (203) away from the piston plate (202). A first fixing plate (205) and a second fixing plate (206) are fixedly installed on both sides of the negative pressure cylinder (1). A first electric telescopic rod (207) is fixedly installed on the surface of the first fixing plate (205). A second electric telescopic rod (208) is fixedly installed on the surface of the second fixing plate (206). The output ends of the first electric telescopic rod (207) and the second electric telescopic rod (208) are fixedly connected to the lifting plate (204).

2. The automatic mold changing mechanism for cold heading machine according to claim 1, characterized in that: The first fixing plate (205) has a first extension rod (209) fixedly installed on both sides of the first fixing plate (205), and the second fixing plate (206) has a second extension rod (210) fixedly installed on both sides of the second fixing plate (206). A cross plate (211) is slidably connected between each of the first extension rod (209) and the second extension rod (210).

3. The automatic mold changing mechanism for cold heading machine according to claim 1, characterized in that: The first fixing plate (205) has a third electric telescopic rod (217) fixedly installed on both sides of the first fixing plate (205), and the second fixing plate (206) has a fourth electric telescopic rod (218) fixedly installed on both sides of the second fixing plate (206). The output end of each of the third electric telescopic rod (217) and the fourth electric telescopic rod (218) is fixedly connected to the cross plate (211).

4. The automatic mold changing mechanism for cold heading machine according to claim 2, characterized in that: U-shaped rods (212) are fixedly installed on the surfaces of both cross plates (211). An installation cylinder (213) is inserted into the end of the U-shaped rod (212) away from the cross plate (211). An arc-shaped clamping plate (214) is fixedly installed on the end of the installation cylinder (213) away from the U-shaped rod (212).

5. The automatic mold changing mechanism for cold heading machine according to claim 1, characterized in that: A first PLC controller (215) is fixedly installed on the side of the first fixing plate (205), and a second PLC controller (216) is fixedly installed on the side of the second fixing plate (206).

6. The automatic mold changing mechanism for cold heading machine according to claim 5, characterized in that: The first PLC controller (215) is electrically connected to the first electric telescopic rod (207) and the third electric telescopic rod (217), and the second PLC controller (216) is electrically connected to the second electric telescopic rod (208) and the fourth electric telescopic rod (218).

7. The automatic mold changing mechanism for cold heading machine according to claim 4, characterized in that: The outer wall surface of the U-shaped rod (212) is provided with an installation device (3). The installation device (3) includes an L-shaped insert plate (31) fixedly installed on the outer wall surface of the U-shaped rod (212). The outer wall surface of the installation cylinder (213) is fixedly installed with a socket (32). The surface of the socket (32) is provided with a slot (33). The end of the L-shaped insert plate (31) away from the U-shaped rod (212) is inserted into the slot (33).

8. The automatic mold changing mechanism for cold heading machine according to claim 7, characterized in that: An extension plate (34) is fixedly installed on the top surface of the socket (32), and a bolt (35) is threadedly connected to the surface of the extension plate (34). A threaded hole (36) is opened on the surface of the horizontal end of the L-shaped plug plate (31).

9. The automatic mold changing mechanism for cold heading machine according to claim 1, characterized in that: The negative pressure cylinder (1) is equipped with a mold positioning detection device, including a proximity switch installed on the cylinder wall of the negative pressure cylinder (1), which is used to detect the position of the piston plate (202) and feed it back to the first PLC controller (215) and the second PLC controller (216).

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