A part ejection device for a cold heading machine

Abstract

This invention relates to a part ejection device for a cold heading machine, comprising a first die, a second die, a sliding cylinder, a piston, and a spring. The first die is located at the front end of the die cavity, and the second die is located at the rear end, together forming a cavity for accommodating the sliding cylinder, a punch, and an ejector tube. The second die has an air inlet and an air outlet. One end of the sliding cylinder is connected to the ejector tube, and its outer surface has a ventilation groove to guide the flow of compressed air. The piston is movably placed inside the sliding cylinder and connected to the punch, and the spring is mounted on the punch. During operation, compressed air enters the sliding cylinder through an external pipeline, the air inlet, and the ventilation groove, pushing the piston and moving the sliding cylinder from a first position to a second position, compressing the spring. When the sliding cylinder reaches the second position, the ventilation groove connects to the air outlet, and after the air is discharged, the sliding cylinder returns to the first position due to the spring's thrust, preventing interference between the punch and the part. This device is suitable for use in automotive parts production lines.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle parts manufacturing, specifically a parts ejection device for cold heading machines. Background Technology

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

[0003] During the cold heading process, after the parts are formed on the cold heading machine, they usually need to be ejected from the die by an ejector device. However, for parts with recesses, the head of the die punch often gets embedded in the recess, causing close contact between the part and the punch. When the clamps attempt to hold the part and move it laterally, interference between the part and the punch is likely to occur, resulting in the part not being able to be held stably, or even the part falling or tilting, which seriously affects production efficiency and product quality.

[0004] Therefore, based on the problems and shortcomings of the existing technology, a part ejection device for a cold heading machine is proposed. This device can not only stably eject the part from the die, but also effectively avoid interference with the punch when the clamp holds the part and moves it laterally, thereby significantly improving production efficiency and product qualification rate. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a part ejection device for cold heading machines. This device can stably eject parts from the die during the cold heading process and effectively prevent interference with the punch when the clamps are holding the parts and moving them laterally. This significantly improves production efficiency and product qualification rate. This device can be adapted to the cold heading production of various parts and is particularly suitable for automotive parts production lines using cold heading machines.

[0006] To achieve the above objectives, the technical solution adopted by the present invention includes:

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

[0008] The first die cavity is fitted at the front end of the die cavity;

[0009] The second die sleeve is disposed 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 the sliding cylinder, the punch rod, and the ejector tube. The second die sleeve is provided with an air inlet and an air outlet.

[0010] A sliding cylinder, one end of which is connected to one end of an 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 within the sliding cylinder, and one end of the piston extends out of the sliding cylinder and is connected to one end of the punch rod;

[0012] A spring is mounted on the punch and moves with the punch;

[0013] Compressed air in the compressed air pipeline enters the sliding cylinder through the external pipeline, the air inlet, and the venting groove, acting on the piston and pushing the piston to move the sliding cylinder from the first position to the second position. The spring is compressed, and when the sliding cylinder moves to the second position, the venting groove connects with the exhaust port, and the compressed air is discharged through the venting groove and the exhaust port. The spring's thrust causes the sliding cylinder to move back from the second position to the first position.

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

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

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

[0017] Furthermore, the compressed air pipeline is also equipped with a control valve and a pressure sensor. The pressure sensor monitors the pressure of the compressed air and automatically adjusts the control valve according to pressure changes.

[0018] Optionally, the first and second die sleeves are detachably equipped with sealing rings on the outer walls of the sliding cylinder.

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

[0020] Furthermore, there are two sealing rings, which are respectively disposed at both ends of the sliding cylinder.

[0021] The beneficial effects of this invention are as follows:

[0022] The part ejection device of this invention utilizes the coordinated operation of components such as a first die sleeve, a second die sleeve, a sliding cylinder, a piston, a spring, and a compressed air pipeline. During the part ejection stage, compressed air from the compressed air pipeline enters the sliding cylinder through an external pipeline, the air inlet, and the venting groove, acting on the piston and thereby driving the sliding cylinder and the punch rod to move stably, ensuring the part is smoothly ejected from the die. The spring is also compressed and stores energy during this process. When the sliding cylinder moves from the first position to the second position, the venting groove connects to the exhaust port, allowing the compressed air to escape. The piston loses its external force, and the spring releases energy to push the punch rod backward, separating the part from the punch rod in a timely manner and effectively preventing interference between the part and the punch rod during lateral movement.

[0023] Therefore, this invention can simply, stably, and reliably ensure that when parts are clamped and moved laterally, interference with the punch can be effectively avoided, thereby reducing the risk of parts falling or tilting, avoiding production interruptions, and significantly improving production efficiency and product quality. It is particularly suitable for automotive parts production lines using cold heading machines. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the ejection state of a part as provided in an embodiment of this application;

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

[0026] Figure 3 This is a schematic diagram of the second state of a part ejection device for a cold heading machine provided in an embodiment of this application; the figures are explained as follows: 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 Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting the invention.

[0028] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. The terms “first,” “second,” etc., are merely for clarification of the subject matter and do not limit the subject matter itself. Of course, the subjects defined by “first” and “second” may be the same terminal, device, and user, or the same type of terminal, device, and user. It should be further understood that the term “comprising” as used in this application means the presence of the stated 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” as used herein includes all or any unit and all combinations of one or more associated listed items.

[0029] Furthermore, it should be understood that in the embodiments of this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single 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, and c can be single or multiple.

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0031] like Figure 1 The diagram shows the ejection state of part 1 after cold heading. Part 1 has a recess at the bottom. When part 1 is ejected from the mold after cold heading, the head of the punch 2 is embedded in the recess of part 1, and the two are in close contact. When the clamps clamp part 1 and move it laterally, the recess of part 1 and the head of the punch 2 of the mold will interfere, preventing part 1 from moving laterally. If the clamps move forcibly, part 1 cannot be stably clamped, causing part 1 to fall or its movement to be blocked, which in turn leads to production interruption, reducing production efficiency and product quality.

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

[0033] The part ejection device includes:

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

[0035] The second die sleeve 10 is located at the rear end of the die cavity 5 and together with the first die sleeve 4 forms a mold cavity. The mold cavity is used to accommodate the sliding cylinder 7, the punch 2 and the ejector tube 9. 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] Piston 6 is movably disposed within the sliding cylinder 7, and one end of piston 6 extends out from the sliding cylinder 7 and is connected to one end of the punch 2;

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

[0039] like Figure 2 , 3 As shown, 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 venting groove, acting on the piston 6 and pushing the piston 6 to move the sliding cylinder 7 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 venting groove connects with the exhaust port 12, and the compressed air is discharged through the venting groove and the exhaust port 12. The thrust of the spring 3 causes the sliding cylinder 7 to move back from the second position to the first position.

[0040] Furthermore, the outer wall of the piston 6 is provided with an annular air groove, which 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-shaped.

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

[0043] Furthermore, the compressed air pipeline is also equipped with a control valve and a pressure sensor. The pressure sensor monitors the pressure of the compressed air and automatically adjusts the control valve according to pressure changes.

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

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

[0046] Furthermore, there are two sealing rings 8, which are respectively disposed at both ends of the sliding cylinder 7.

[0047] During the ejection stage of part 1 in use, compressed air from the compressed air pipeline enters the sliding cylinder 7 through the external pipeline, the air inlet 11, and the venting groove, acting on the piston 6. This, in turn, drives the sliding cylinder 7 and the punch 2 to move stably, ensuring that part 1 is smoothly ejected from the die. At this time, the spring 3 is compressed and stores energy. When the sliding cylinder 7 moves from the first position to the second position, the venting groove connects with the exhaust port 12, the compressed air is discharged, the piston 6 loses external force, and the spring 3 releases energy to push the punch 2 backward, allowing part 1 to separate from the punch 2 in a timely manner, effectively avoiding motion interference between part 1 and the punch 2 during lateral movement.

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

[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A part ejection device for a cold heading machine, comprising: The first die cavity is fitted at the front end of the die cavity; The second die sleeve is disposed 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 the sliding cylinder, the punch rod, and the ejector tube. The second die sleeve is provided with an air inlet and an air outlet. A sliding cylinder, one end of which is connected to one end of an 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 within the sliding cylinder, and one end of the piston extends out of the sliding cylinder and is connected to one end of the punch rod; A spring is mounted on the punch and moves with the punch; During the part ejection stage, compressed air in the compressed air pipeline enters the sliding cylinder through the external pipeline, the air inlet, and the ventilation groove, acting on the piston and driving the punch rod to move stably, ensuring that the part is successfully ejected from the die. At this time, the spring is compressed and stores energy. When the sliding cylinder moves from the first position to the second position, the ventilation groove connects with the exhaust port, 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. The compressed air pipeline is also equipped with a control valve and a pressure sensor. The pressure sensor monitors the pressure of the compressed air and automatically adjusts the control valve according to the pressure changes.

2. The apparatus as claimed in claim 1, characterized in that, The first and second die sleeves are detachable.

3. The apparatus as described in claim 1, characterized in that, The outer wall of the sliding cylinder is provided with a sealing ring.

4. The apparatus as described in claim 3, characterized in that, There are two sealing rings, which are respectively installed at both ends of the sliding cylinder.

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