Part ejection device for cold header

Abstract

The invention relates to a part ejection device for a cold header. The part ejection device comprises a first female die, a second female die, a sliding air cylinder, a piston, a spring and the like. The first female die is arranged at the front end of the female die cavity, the second female die is arranged at the rear end of the female die cavity, the first female die and the second female die jointly form a die cavity used for containing the sliding air cylinder, the punching rod and the ejection pipe, and the second female die is provided with an air inlet hole and an exhaust hole. One end of the sliding air cylinder is connected with the ejection pipe, the outer surface of the sliding air cylinder is provided with a ventilation groove to guide compressed air to flow, the piston is movably arranged in the sliding air cylinder and connected with the punching rod, and the spring is installed on the punching rod. During working, compressed air enters the sliding air cylinder through an external pipeline, the air inlet hole and the ventilation groove to push the piston, so that the sliding air cylinder moves to a second position from a first position and compresses the spring, when the sliding air cylinder moves to the second position, the ventilation groove is communicated with the exhaust hole, and after air is exhausted, the sliding air cylinder returns to the first position by means of thrust of the spring. And therefore, the punching rod is suitable for an automobile part production line.

Description

Technical Field

[0001] The invention relates to the field of new energy automobile parts production, in particular to a parts ejecting device for a cold heading machine. Background Art

[0002] A cold heading machine is a device that applies local pressure to metal wires or bars through a die at room temperature, causing the material to undergo plastic deformation to produce parts of the desired shape. It is widely used in the fields of automotive parts, fasteners, mechanical parts, etc., and is an indispensable and important equipment in the metal processing industry.

[0003] During the production process of cold heading machines, after the parts are formed on the cold heading machine, they usually need to be pushed out of the die through an ejector device. However, for parts with pits, the punch head of the mold is often embedded in the pit, resulting in close contact between the part and the punch. When the clamp tries to clamp the part for lateral movement, it is easy to cause interference between the part and the punch, resulting in the part being unable to be stably clamped, and even causing the part to fall or tilt, seriously affecting production efficiency and product quality.

[0004] Therefore, based on the above-mentioned problems and shortcomings of the prior art, a part ejection device for a cold heading machine is proposed. The device can not only stably eject the part from the die, but also effectively avoid interference with the punch when the clamp clamps the part for lateral movement, thereby significantly improving production efficiency and product qualification rate. Summary of the invention

[0005] In order to solve the shortcomings of the prior art, the present invention proposes a part ejection device for a cold heading machine, which can stably eject the parts from the die during the cold heading process of the parts, and can effectively avoid interference with the punch when the clamp clamps the parts for lateral movement, thereby significantly improving production efficiency and product qualification rate. This device can adapt to the cold heading production of various parts, and is particularly suitable for the automotive parts production line of the cold heading machine.

[0006] To achieve the above objectives, the technical solutions adopted by the present invention include:

[0007] A parts ejection device for a cold heading machine, comprising:

[0008] The first concave mold is sleeved on the front end of the concave mold cavity;

[0009] The second die sleeve is arranged at the rear end of the die cavity, and together with the first die sleeve forms a die cavity, the die cavity is used to accommodate a sliding cylinder, a punch rod and an ejector tube, and the second die sleeve is provided with an air inlet hole and an air exhaust hole;

[0010] A sliding cylinder, one end of which is connected to one end of the ejector pipe, and the outer surface of the sliding cylinder is provided with at least one ventilation groove for guiding the flow of compressed air;

[0011] A piston is movably disposed in the sliding cylinder, and one end of the piston extends out of the sliding cylinder and is connected to one end of a punch rod;

[0012] A spring, mounted on the punch rod and moving with the punch rod;

[0013] The compressed air in the compressed air pipeline enters the interior of the sliding cylinder through the external pipeline, the air inlet hole and the ventilation groove, acts on the piston, pushes the piston to drive the sliding cylinder to move from the first position to the second position, the spring is compressed, and when the sliding cylinder moves to the second position, the ventilation groove is connected with the exhaust hole, the compressed air is discharged through the ventilation groove and the exhaust hole, and the sliding cylinder moves from the second position back to the first position through the thrust of the spring.

[0014] Furthermore, an annular air groove is provided on the outer wall of the piston, and the annular air groove is connected to the ventilation groove of the sliding cylinder.

[0015] Furthermore, the ventilation groove of the sliding cylinder is designed to be spiral.

[0016] Furthermore, a one-way valve is provided between the annular air groove of the piston and the ventilation groove of the sliding cylinder.

[0017] Furthermore, the compressed air pipeline is also provided with a control valve and a pressure sensor, and the pressure of the compressed air is monitored by the pressure sensor, and the control valve is automatically adjusted according to the pressure change.

[0018] Optionally, the first die sleeve and the second die sleeve are detachably provided with a sealing ring on the outer wall of the sliding cylinder.

[0019] Optionally, a sealing ring is provided on the outer wall of the sliding cylinder.

[0020] Furthermore, the number of the sealing rings is two, which are respectively arranged at the two ends of the sliding cylinder.

[0021] The beneficial effects of the present invention are:

[0022] The part ejection device of the present invention is adopted, through the coordinated work of the first die sleeve, the second die sleeve, the sliding cylinder, the piston, the spring and the compressed air pipeline; in the part ejection stage, the compressed air in the compressed air pipeline enters the sliding cylinder through the external pipeline, the air inlet and the ventilation groove, acts on the piston, and then drives the sliding cylinder and the punch rod to move stably, ensuring that the part is smoothly ejected from the die, and the spring is compressed to store energy at this time. When the sliding cylinder moves from the first position to the second position, the ventilation groove is connected to the exhaust hole, the compressed air is discharged, the piston loses the external force, and the spring releases energy to push the punch rod backward, so that the part and the punch rod are separated in time, effectively avoiding the interference of the part with the movement of the punch rod when the part moves horizontally.

[0023] Therefore, the present invention can simply, stably and reliably ensure that when the parts are clamped by the clamp and moved laterally, they can effectively avoid interference with the punch rod, thereby reducing the risk of parts falling or tilting, avoiding production interruptions caused by this, and significantly improving production efficiency and product quality. It is particularly suitable for the automotive parts production line of the cold heading machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram showing the ejection state of a part provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a first state of a part ejection device for a cold heading machine provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of a second state of a part ejection device for a cold heading machine provided in an embodiment of the present application; description of the figure numbers: 1-part, 2-punch rod, 3-spring, 4-first die sleeve, 5-die cavity, 6-piston, 7-sliding cylinder, 8-sealing ring, 9-ejection tube, 10-second die sleeve, 11, air inlet, 12, exhaust hole. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present invention.

[0028] Those skilled in the art can understand that, unless otherwise stated, the singular forms "one", "an", "said" and "the" used herein may also include plural forms, and the "first", "second", etc., are only used to distinguish and define objects for the purpose of introducing the scheme clearly, and do not limit the objects themselves. Of course, the objects defined by "first" and "second" may be the same terminal, device, user, etc., or the same type of terminal, device and user. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0029] In addition, it should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c can be single or multiple.

[0030] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1 The schematic diagram of the ejection state of the part 1 after cold heading processing is shown. The part 1 has a pit at the bottom. When the part 1 is ejected from the mold after cold heading forming, the head of the punch 2 is protruding and embedded in the pit of the part 1, and the two are in close contact. When the clamp clamps the part 1 and moves it laterally, the pit of the part 1 and the head of the mold punch 2 will interfere with each other, preventing the part 1 from moving laterally. If the clamp is forcibly moved, the part 1 cannot be clamped stably, causing the part 1 to fall or its movement to be blocked, which in turn leads to production interruption and reduces production efficiency and product quality.

[0032] Therefore, the part ejection device is mainly used in the production process of the above-mentioned special-shaped parts 1 to prevent the pit of the part 1 and the head of the punch 2 from interfering with each other, causing the part 1 to fall or its movement to be blocked.

[0033] The part ejection device comprises:

[0034] The first die sleeve 4 is arranged at the front end of the die cavity 5;

[0035] The second die sleeve 10 is disposed at the rear end of the die cavity 5, and together with the first die sleeve 4 forms a die cavity, wherein the die cavity is used to accommodate the sliding cylinder 7, the punch rod 2 and the ejector tube 9, and the second die sleeve 10 is provided with an air inlet 11 and an air outlet 12;

[0036] A sliding cylinder 7, one end of which is connected to one end of the ejector pipe 9, and the outer surface of the sliding cylinder 7 is provided with at least one ventilation groove for guiding the flow of compressed air;

[0037] A piston 6 is movably disposed in the sliding cylinder 7, and one end of the piston 6 extends out from the sliding cylinder 7 and is connected to one end of the punch rod 2;

[0038] A spring 3 is mounted on the punch rod 2 and moves with the punch rod 2;

[0039] like Figure 2 , 3 As shown, the compressed air in the compressed air pipeline enters the interior of the sliding cylinder 7 through the external pipeline, the air inlet hole 11 and the ventilation groove, acts on the piston 6, pushes the piston 6 to drive the sliding cylinder 7 to move from the first position to the second position, the spring 3 is compressed, and when the sliding cylinder 7 moves to the second position, the ventilation groove is connected with the exhaust hole 12, and the compressed air is discharged through the ventilation groove and the exhaust hole 12, and the sliding cylinder 7 moves from the second position back to the first position through the thrust of the spring 3.

[0040] Furthermore, an annular air groove is provided on the outer wall of the piston 6 , and the annular air groove is connected to the ventilation groove of the sliding cylinder 7 .

[0041] Furthermore, the ventilation groove of the sliding cylinder 7 is designed to be spiral.

[0042] Furthermore, a one-way valve is provided between the annular air groove of the piston 6 and the ventilation groove of the sliding cylinder 7 .

[0043] Furthermore, the compressed air pipeline is also provided with a control valve and a pressure sensor, and the pressure of the compressed air is monitored by the pressure sensor, and the control valve is automatically adjusted according to the pressure change.

[0044] Optionally, the first die sleeve 4 and the second die sleeve 10 are detachable.

[0045] Optionally, a sealing ring 8 is provided on the outer wall of the sliding cylinder 7 .

[0046] Furthermore, the number of the sealing rings 8 is two, which are respectively arranged at two ends of the sliding cylinder 7 .

[0047] During the ejection stage of the part 1 during use, the compressed air in the compressed air pipeline enters the interior of the sliding cylinder 7 through the external pipeline, the air inlet 11 and the ventilation groove, acts on the piston 6, and then drives the sliding cylinder 7 and the punch 2 to move stably, ensuring that the part 1 is smoothly ejected from the die, and the spring 3 is compressed to store energy at this time. When the sliding cylinder 7 moves from the first position to the second position, the ventilation groove is connected to the exhaust hole 12, the compressed air is discharged, the piston 6 loses the external force, and the spring 3 releases energy to push the punch 2 back, so that the part 1 and the punch 2 are separated in time, effectively avoiding the interference of the movement of the part 1 with the punch 2 when it moves horizontally.

[0048] Therefore, the present invention can simply, stably and reliably ensure that the part 1 can effectively avoid interference with the punch 2 when it is clamped by the clamp and moved laterally, thereby reducing the risk of the part 1 falling or tilting, avoiding production interruptions caused by this, and significantly improving production efficiency and product quality. It is particularly suitable for the automotive parts production line of the cold heading machine.

[0049] The above is only a preferred specific embodiment 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 a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A parts ejection device for a cold heading machine, comprising: The first concave mold is sleeved on the front end of the concave mold cavity; The second die sleeve is arranged at the rear end of the die cavity, and together with the first die sleeve forms a die cavity, the die cavity is used to accommodate a sliding cylinder, a punch rod and an ejector tube, and the second die sleeve is provided with an air inlet hole and an air exhaust hole; A sliding cylinder, one end of which is connected to one end of the ejector pipe, and the outer surface of the sliding cylinder is provided with at least one ventilation groove for guiding the flow of compressed air; A piston is movably disposed in the sliding cylinder, and one end of the piston extends out of the sliding cylinder and is connected to one end of a punch rod; A spring, mounted on the punch rod and moving with the punch rod; The compressed air in the compressed air pipeline enters the interior of the sliding cylinder through the external pipeline, the air inlet hole and the ventilation groove, acts on the piston, pushes the piston to drive the sliding cylinder to move from the first position to the second position, the spring is compressed, and when the sliding cylinder moves to the second position, the ventilation groove is connected with the exhaust hole, the compressed air is discharged through the ventilation groove and the exhaust hole, and the sliding cylinder moves from the second position back to the first position through the thrust of the spring.

2. The device according to claim 1, characterized in that An annular air groove is arranged on the outer wall of the piston, and the annular air groove is connected with the ventilation groove of the sliding cylinder.

3. The device according to claim 1 or 2, characterized in that The ventilation groove of the sliding cylinder is designed to be spiral.

4. The device according to claim 3, characterized in that A one-way valve is arranged between the annular air groove of the piston and the ventilation groove of the sliding cylinder.

5. The device according to claim 4, characterized in that The compressed air pipeline is also provided with a control valve and a pressure sensor, through which the pressure of the compressed air is monitored, and the control valve is automatically adjusted according to the pressure change.

6. The device according to claim 1 or 2, characterized in that: The first die sleeve and the second die sleeve are detachably provided with a sealing ring on the outer wall of the sliding cylinder.

7. The device according to claim 1, characterized in that The outer wall of the sliding cylinder is provided with a sealing ring.

8. The device according to claim 7, characterized in that The number of the sealing rings is 2, which are respectively arranged at the two ends of the sliding cylinder.

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