Cam device for ejection of female die of cold header and ejection system

Abstract

The invention relates to a cam device and an ejection system for ejecting a female die of a cold header, the device comprises a push rod, a small shaft, a small wheel, a cam, a spiral sleeve, a flat key and a shaft, and is characterized in that the push rod is connected with the small wheel through the small shaft, and the small wheel is in rolling contact with the cam; the cam comprises a cam outer ring and a cam inner ring, and the cam outer ring is in meshed contact with the cam inner ring; the spiral sleeve is connected with the cam inner ring through threads, and the spiral sleeve is used for fixing the cam outer ring and the cam inner ring; the cam is connected with the shaft through a flat key, and radiuses from points on the periphery of the cam to the center of the shaft are different. The female die ejection cam device which is specially designed is adopted, movement interference between parts and a clamp system or a male die is prevented, the parts can be stably ejected out, clamped and transferred, normal and continuous production of the parts is guaranteed, and the cold heading device is suitable for cold heading production of various parts.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle parts production, and particularly to a cam device and an ejection system for ejecting a concave die of a cold heading machine. Background Art

[0002] When the cold heading machine operates, the punch reciprocates left and right, and at the same time, the clamp moves left and right. After the parts are formed in the concave die, the concave die ejection cam pushes the ejection mechanism, thereby ejecting the parts out of the concave die and into the clamp. When the cold heading machine produces some parts with special shapes, it is necessary to eject the concave die earlier or later to cooperate with the movement of the clamp to complete the stable clamping of the parts. If the ejection timing of the concave die is incorrect, that is, the timing of the concave die ejection mechanism pushing the parts out of the concave die is incorrect, the parts will have kinematic interference with the clamp system or the punch, or the parts cannot be clamped by the clamp, resulting in abnormal production. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the present invention proposes a cam device and an ejection system for ejecting a concave die of a cold heading machine. By using a specially designed concave die ejection cam device, the parts can be stably ejected and clamped for transfer, preventing kinematic interference between the parts and the clamp system or the punch. At the same time, the ejection moment of the concave die can be adjusted within a certain range to adapt to the cold heading production of various parts and ensure the normal and continuous production of the parts.

[0004] To achieve the above objectives, the technical solutions adopted by the present invention include:

[0005] A cam device for ejecting a concave die of a cold heading machine, comprising a push rod, a small shaft, a small wheel, a cam, a screw sleeve, a flat key, and a shaft. It is characterized in that the push rod is connected to the small wheel through the small shaft, and the small wheel is in rolling contact with the cam; the cam includes a cam outer ring and a cam inner ring, and the cam outer ring is in meshing contact with the cam inner ring; the screw sleeve is connected to the cam inner ring through a thread, and the screw sleeve is used to fix the cam outer ring and the cam inner ring; the cam is connected to the shaft through a flat key, and the radii of the points on the periphery of the cam to the center of the shaft are different.

[0006] Further, the movement of the high point and the low point of the cam is transmitted to the push rod through the small wheel. The push rod is connected to the concave die ejection mechanism of the cold heading machine, and the push rod is used to move up and down when the cam rotates to drive the action of the concave die ejection mechanism of the cold heading machine.

[0007] Further, the inner ring of the cam outer ring is tooth-shaped, the cam outer ring is made of bearing steel, and the outer surface of the cam outer ring is surface hardened.

[0008] Further, the outer ring at one end of the cam inner ring is tooth-shaped, and the cam inner ring meshes with the tooth-shaped inner ring of the cam outer ring through the tooth shape of the outer ring.

[0009] Further, the outer ring at the other end of the cam inner ring is provided with a thread, the inside of the spiral sleeve is provided with a thread, and the spiral sleeve is spirally connected with the cam inner ring, so that the position of the cam outer ring is fixed and the cam outer ring cannot move axially.

[0010] The present invention also relates to an ejection system, which is characterized in that it includes performing an ejection operation using the device as described above.

[0011] Further, the device is placed inside the cold heading machine, the device is placed below the female die, the shaft of the device is connected to the shaft drive device of the cold heading machine, and the shaft drive device of the cold heading machine drives the shaft of the device to rotate;

[0012] The shaft of the device drives the cam inner ring to rotate through a flat key, and the cam inner ring drives the cam outer ring to rotate through the tooth shape;

[0013] The surface of the cam outer ring is tangent to the small wheel, the small wheel is in rolling contact with the cam, and the small wheel transmits the running actions of the high and low points of the cam to the push rod, that is, the cam outer ring drives the small wheel and the push rod to move up and down, driving the female die ejection mechanism to complete the ejection action;

[0014] The clamp is synchronized with the ejection action of the female die for clamping;

[0015] Repeat the above steps to complete the continuous production process.

[0016] Further, the ejection system further includes:

[0017] Based on the different radii of each point on the periphery of the cam to the center of the shaft, adjust the high point phase angle of the cam outer ring, change the phase angle of the female die ejection, and perform the ejection operation.

[0018] Furthermore, the adjustment of the high point phase angle of the cam outer ring includes:

[0019] Adjust the tooth-shaped meshing area between the cam outer ring and the cam inner ring, rotate N teeth, adjust the radius distance from the tangent point of the small wheel and the cam outer ring to the center of the shaft, install the cam outer ring on the cam inner ring, install and tighten the spiral sleeve, and fix the cam outer ring on the cam inner ring so that the position of the cam outer ring is fixed and cannot move axially.

[0020] The beneficial effects of the present invention are:

[0021] By adopting the cam device and the ejection system for ejecting the female die of a cold heading machine according to the present invention, components can be stably ejected and clamped for transfer, preventing movement interference between the components and the clamp system or the punch. At the same time, the ejection moment of the female die can be adjusted within a certain range to adapt to the cold heading production of various components, ensuring the normal and continuous production of the components. Brief Description of the Drawings

[0022] Figure 1 It is a schematic internal structure diagram of a cam device for ejecting the female die of a cold heading machine according to the present invention.

[0023] Figure 2 It is a schematic external structure diagram of a cam device for ejecting the female die of a cold heading machine according to the present invention.

[0024] Figure 3 It is a schematic structure diagram of the cam outer ring of a cam device for ejecting the female die of a cold heading machine according to the present invention.

[0025] Figure 4 It is a schematic structure diagram of the cam inner ring of a cam device for ejecting the female die of a cold heading machine according to the present invention.

[0026] Figure 5 It is a schematic structure diagram of the screw sleeve of a cam device for ejecting the female die of a cold heading machine according to the present invention.

[0027] Description of the drawing reference numerals: 1 - push rod, 2 - small shaft, 3 - small wheel, 41 - cam outer ring, 42 - cam inner ring, 5 - screw sleeve, 6 - flat key, 7 - shaft. Detailed Description of the Invention

[0028] For a clearer understanding of the content of the present invention, it will be described in detail in conjunction with the drawings and embodiments.

[0029] As Figure 1 shown is a schematic internal structure diagram of a cam device for ejecting the female die of a cold heading machine according to the present invention, and as Figure 2 shown is a schematic external structure diagram of a cam device for ejecting the female die of a cold heading machine according to the present invention. In this embodiment, it includes a push rod 1, a small shaft 2, a small wheel 3, a cam outer ring 41, a cam inner ring 42, a screw sleeve 5, a flat key 6, and a shaft 7. The push rod 1 is connected to the small wheel 3 through the small shaft 2, and the small wheel 3 is in rolling contact with the cam outer ring 41; the cam outer ring 41 is in meshing contact with the cam inner ring 42; the screw sleeve 5 is connected to the cam inner ring 42 through a thread, and the screw sleeve 5 is used to fix the cam outer ring 41 and the cam inner ring 42; the cam inner ring 42 is connected to the shaft 7 through the flat key 6, and the radii of the points on the periphery of the cam outer ring 41 to the center of the shaft 7 are different.

[0030] In this embodiment, the cam includes a cam outer ring 41 and a cam inner ring 42. The movement of its high and low points is transmitted to the push rod 1 through the small wheel 3. The push rod 1 is connected to the ejection mechanism of the cold heading machine die. The push rod 1 is used to drive the ejection mechanism of the cold heading machine die to act when the cam rotates and moves up and down.

[0031] In this embodiment, as Figure 3 shown is a schematic structural diagram of the outer ring of the cam of a cam device for ejecting a cold heading machine die according to the present invention. The inner ring of the cam outer ring 41 is tooth-shaped. The cam outer ring 41 is made of bearing steel, and the outer surface of the cam outer ring 41 is surface hardened and has a relatively high hardness.

[0032] In this embodiment, as Figure 4 shown is a schematic structural diagram of the inner ring of the cam of a cam device for ejecting a cold heading machine die according to the present invention. The outer ring at one end of the cam inner ring 42 is tooth-shaped. The cam inner ring 42 is meshed with the inner ring of the cam outer ring 41 through the tooth shape of the outer ring. The outer ring at the other end of the cam inner ring 42 is provided with a thread.

[0033] In this embodiment, as Figure 5 shown is a schematic structural diagram of the spiral sleeve of a cam device for ejecting a cold heading machine die according to the present invention. The inside of the spiral sleeve 5 is provided with a thread. The spiral sleeve 5 is spirally connected to the cam inner ring 42, so that the position of the cam outer ring 41 is fixed and the cam outer ring 41 cannot move axially.

[0034] The working principle of the device of the present invention is as follows:

[0035] A cam device for ejecting a cold heading machine die according to the present invention is installed inside the cold heading machine, below the die direction. The shaft 7 is connected to the shaft drive device of the cold heading machine, and the shaft 7 is driven to rotate by the shaft drive device of the cold heading machine. The normal operating speed of an ordinary cold heading machine is 40 - 100 working cycles per minute. During operation, the cold heading machine runs continuously. The shaft drives the cam inner ring to rotate through a flat key, and then drives the cam outer ring to rotate. The small wheel is always tangent to the surface of the cam outer ring. Therefore, the small wheel and the push rod are also driven to move up and down, thereby driving the die ejection mechanism to complete the ejection action. Repeating the above steps can achieve continuous production.

[0036] When the early or late ejection of the female die is required for the production of special products, loosen the screw sleeve 5, move the outer cam ring 41 towards the screw sleeve 5 to disengage the tooth engagement area, rotate a few teeth, and then install the outer cam ring 41 onto the inner cam ring 42. After good tooth engagement, install and tighten the screw sleeve 5 to fix the outer cam ring 41 on the inner cam ring 42 to form an integral body. At this moment, relative to the shaft 7, the high-point phase angle of the outer cam ring 41 has changed. Continue to operate the cold heading machine, and the phase angle (moment) of the female die ejection has changed. The action of the female die ejection will be advanced or delayed. Thus, the coordination of the female die ejection action with the actions of the clamp and the cam is achieved, and the cold heading production process is jointly completed.

[0037] The present invention also relates to an ejection system that uses the above device to perform the ejection operation. The device is placed inside the cold heading machine, below the female die. The shaft 7 of the device is connected to the shaft drive device of the cold heading machine, and the shaft drive device of the cold heading machine drives the rotation of the shaft 7 of the device;

[0038] The shaft 7 of the device drives the rotation of the inner cam ring 42 through a flat key 6, and the inner cam ring 42 drives the rotation of the outer cam ring 41 through tooth engagement;

[0039] The surface of the outer cam ring 41 is tangent to the small wheel 3, and the small wheel 3 is in rolling contact with the cam. The small wheel transmits the running actions of the high and low points of the cam to the push rod, that is, the outer cam ring 41 drives the small wheel 3 and the push rod 1 to move up and down, driving the female die ejection mechanism to complete the ejection action;

[0040] The clamp is synchronized with the female die ejection action for clamping;

[0041] Repeat the above steps to complete the continuous production process.

[0042] In this embodiment, the ejection system further includes:

[0043] Based on the different radii of the points on the periphery of the cam to the center of the shaft 7, adjust the high-point phase angle of the outer cam ring 41, change the phase angle of the female die ejection, and perform the ejection operation.

[0044] Specifically, adjusting the high-point phase angle of the outer cam ring 41 includes:

[0045] Adjust the tooth engagement area between the outer cam ring 41 and the inner cam ring 42, rotate N teeth, adjust the radius distance from the tangent point of the small wheel 3 and the outer cam ring 41 to the center of the shaft 7, install the outer cam ring 41 on the inner cam ring 42, install and tighten the screw sleeve 5 to fix the outer cam ring 41 on the inner cam ring 42, so that the position of the outer cam ring 41 is fixed and no axial movement can occur.

[0046] By adopting the cam device and the ejection system for ejecting the female die of the cold heading machine described in the present invention, components can be stably ejected and clamped and transferred, preventing movement interference between the components and the clamp system or the punch. At the same time, the ejection moment of the female die can be adjusted within a certain range to adapt to the cold heading production of various components, ensuring the normal and continuous production of the components.

[0047] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A cam device for ejecting a female die of a cold heading machine, comprising a push rod, a small shaft, a small wheel, a cam, a screw sleeve, a flat key, and a shaft, characterized in that, The push rod is connected to the small wheel through a small shaft, and the small wheel is in rolling contact with the cam; the cam includes a cam outer ring and a cam inner ring, and the cam outer ring is in meshing contact with the cam inner ring; the spiral sleeve is connected to the cam inner ring through a thread, and the threaded sleeve is used to fix the cam outer ring and the cam inner ring; the cam is connected to the shaft through a flat key, and the radii of the points on the periphery of the cam to the center of the shaft are different.

2. The device according to claim 1, wherein The high and low point movements of the cam are transmitted to the push rod through the small wheel, and the push rod is connected to the ejection mechanism of the cold heading machine die. The push rod is used to drive the ejection mechanism of the cold heading machine die to act when the cam rotates up and down.

3. The device according to claim 1, characterized in that, The inner ring of the cam outer ring is tooth-shaped, the cam outer ring is made of bearing steel, and the outer surface of the cam outer ring is surface hardened.

4. The device according to claim 1, characterized in that The outer ring at one end of the cam inner ring is tooth-shaped, and the cam inner ring meshes with the inner ring of the cam outer ring through the tooth shape of the outer ring.

5. The device according to claim 1, characterized in that, The outer ring at the other end of the cam inner ring is provided with a thread, and the inner part of the spiral sleeve is provided with a thread. The spiral sleeve is spirally connected to the cam inner ring, so that the position of the cam outer ring is fixed and the cam outer ring cannot move axially.

6. An ejection system, characterized in that, Including performing an ejection operation using the device according to any one of claims 1 to 5.

7. The ejection system according to claim 6, characterized in that, The device is placed inside the cold heading machine, below the die. The shaft of the device is connected to the shaft drive device of the cold heading machine, and the shaft drive device of the cold heading machine drives the shaft of the device to rotate; The shaft of the device drives the cam inner ring to rotate through a flat key, and the cam inner ring drives the cam outer ring to rotate through a tooth shape; The surface of the cam outer ring is tangent to the small wheel, and the small wheel is in rolling contact with the cam. The small wheel transmits the running actions of the high and low points of the cam to the push rod, that is, the cam outer ring drives the small wheel and the push rod to move up and down, driving the die ejection mechanism to complete the ejection action; The clamp is synchronized with the die ejection action for clamping; Repeat the above steps to complete the continuous production process.

8. The ejection system according to claim 6, wherein The ejection system further includes: Based on the different radii of the points on the periphery of the cam to the center of the shaft, adjust the high point phase angle of the cam outer ring, change the phase angle of the die ejection, and perform the ejection operation.

9. The ejection system according to claim 8, wherein The adjustment of the high point phase angle of the cam outer ring includes: Adjust the tooth-shaped meshing area of the cam outer ring and the cam inner ring, rotate N teeth, adjust the radius distance from the tangent point of the small wheel and the cam outer ring to the center of the shaft, install the cam outer ring on the cam inner ring, install and tighten the spiral sleeve, and fix the cam outer ring on the cam inner ring so that the position of the cam outer ring is fixed and cannot move axially.

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