A cold header die structure for preventing misfire

Abstract

The application discloses a cold header die structure capable of preventing air shot, which comprises a die assembly, a punch and an identification mechanism. The die assembly comprises a first die, a second die and a third die. The second die is slidingly arranged in the inner cavity of the first die, and the third die is fixedly arranged in the inner cavity of the first die. A spring is arranged between the second die and the third die, and the two ends of the spring are in abutment with the second die and the third die, respectively. The identification mechanism comprises a sensor and a transmission rod. The sensor is arranged in a containing cavity, and the transmission rod is slidingly arranged in a guide hole. The technical effects achieved are as follows: the air shot phenomenon can be found in time during the machining process, the on-site personnel can be reminded in time by cooperating with an alarm, so that the abnormal products can be taken out, and the air shot abnormal products can be prevented from being mixed into qualified products; the production process can be automatically monitored, the loss caused by the air shot of the cold header is avoided, and the abnormal products can be prevented from being mixed into qualified products, and the effect is good after practical application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts production equipment, in particular to a cold header die structure capable of preventing air hitting. BACKGROUND

[0002] Some parts of new energy vehicles are produced on a cold header, and the cold header is necessary equipment for producing some new energy vehicle parts. When the cold header operates, the male die reciprocates left and right, and the female die is static. The male die and the female die are respectively installed in the male die cavity and the female die cavity. In the cold heading production process, the product is transferred from one station to the next station by the clamping and conveying device. In this process, since the clamping and conveying device has a certain error probability, this will cause the product parts to fall during the conveying process. In this way, there is no part in the next station forming process, resulting in air hitting, and the workpiece lacks one station forming, which will cause the size to not meet the drawing, which is a phenomenon that needs to be avoided as much as possible in the cold heading. There is no mature technology to solve this problem at present. SUMMARY

[0003] Therefore, the present application provides a cold header die structure capable of preventing air hitting to solve the above problems in the prior art.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] According to the first aspect of the present application, a cold header die structure capable of preventing air hitting includes a female die assembly, a male die, and an identification mechanism. The female die assembly includes a first female die, a second female die, and a third female die. The second female die is slidingly arranged in the inner cavity of the first female die. The third female die is fixedly arranged in the inner cavity of the first female die. A spring is arranged between the second female die and the third female die. The two ends of the spring are respectively in abutment with the second female die and the third female die.

[0006] One end of the second female die away from the third female die is provided with a forming cavity. The third female die is provided with a guide hole and a containing cavity. The guide hole is arranged along the axial direction of the third female die, and the guide hole penetrates through one end of the third female die facing the second female die. The guide hole is in communication with the containing cavity.

[0007] The identification mechanism includes a sensor and a transmission rod. The sensor is arranged in the containing cavity. The transmission rod is slidingly arranged in the guide hole.

[0008] The male die is arranged towards the forming cavity. The male die is installed on the output end of a driving mechanism. The driving mechanism is used to drive the male die to reciprocate along the axial direction of the third female die.

[0009] Further, the sensor is a contact position sensor, which outputs a high level signal when pressed and a low level signal when not pressed.

[0010] During the processing, when the forming cavity is provided with a workpiece to be formed, the second die pushes the transmission rod to press the sensor when the punch reaches the preset forming position to press the workpiece in the forming cavity, the sensor outputs a high level signal, indicating that there is no idle punching phenomenon; when the forming cavity is not provided with a workpiece to be formed, the second die cannot push the transmission rod to press the sensor when the punch reaches the preset forming position, the sensor outputs a low level signal, indicating that there is an idle punching phenomenon.

[0011] Further, the forming cavity is arranged along the axial direction of the second die, and the second die is provided with a first ejection hole along its axis, and the first ejection hole penetrates the second die.

[0012] The third die is provided with a second ejection hole along its axis, and the second ejection hole penetrates the third die, and the second ejection hole is coaxially arranged with the first ejection hole.

[0013] Further, it further comprises an ejection rod and a driving assembly, the ejection rod is arranged at the output end of the driving assembly, and the driving assembly is used to drive the ejection rod to reciprocate along its axial direction; the ejection rod is coaxially arranged with the first ejection hole, and the ejection rod is matched with the first ejection hole and the second ejection hole.

[0014] Further, the driving assembly adopts a telescopic air cylinder or a telescopic hydraulic cylinder.

[0015] Further, the first ejection hole and the second ejection hole are both circular holes, and the ejection rod is a cylindrical rod.

[0016] Further, the third die comprises a base body and a guide section, the guide section is arranged at one end of the base body, the guide section is coaxially arranged with the base body, and the spring is sleeved on the guide section.

[0017] Further, the base body and the guide section are both cylindrical.

[0018] Further, the first die is a cylindrical rod, and the second die is a cylindrical rod.

[0019] Further, the transmission rod is a cylindrical solid rod.

[0020] The present application has the following advantages: by setting the identification mechanism, the empty hitting phenomenon can be found in time during the processing, and the signal is transmitted to the cold header to stop and alarm, which can remind the on-site personnel in time by cooperating with the alarm, so as to take out the abnormal product, avoid the abnormal product mixed into the qualified product, the whole structure can greatly simplify the empty hitting identification work of the cold header in the running process, can automatically monitor the production process, avoid the loss caused by the empty hitting of the cold header, also avoid the abnormal product mixed into the qualified product, and the effect is good after practical application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0022] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limiting conditions of the implementation of the present application, so they do not have technical substantive significance, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0023] Figure 1 A cross-sectional view of a cold header die structure for preventing empty hitting provided by some embodiments of the present application.

[0024] Figure 2 A second die of a cold header die structure for preventing empty hitting provided by some embodiments of the present application.

[0025] Figure 3 An end face structure schematic view of the second die of the cold header die structure for preventing empty hitting provided by some embodiments of the present application.

[0026] Figure 4 A third die of a cold header die structure for preventing empty hitting provided by some embodiments of the present application. Figure 3

[0027] Figure 5 An end face structure schematic view of the third die of the cold header die structure for preventing empty hitting provided by some embodiments of the present application.

[0028] Figure 6 An end face structure schematic view of the third die of the cold header die structure for preventing empty hitting provided by some embodiments of the present application.

[0029] Figure 7 ​For Figure 6 a B-B sectional view.

[0030] In the figure: 1, male die, 2, workpiece, 3, first female die, 4, second female die, 5, third female die, 6, sensor, 7, transmission rod, 8, spring, 9, ejection rod, 10, forming cavity, 11, first ejection hole, 12, base, 13, guide section, 14, second ejection hole, 15, guide hole, 16, accommodating cavity. DETAILED DESCRIPTION

[0031] The following specific embodiments illustrate the embodiments of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Example 1

[0033] As Figures 1 to 7 shown, the structure of the cold header die of the first aspect of the present application to prevent misfire includes a female die assembly, a male die 1 and an identification mechanism. The female die assembly includes a first female die 3, a second female die 4 and a third female die 5. The second female die 4 is slidingly arranged in the inner cavity of the first female die 3, and the third female die 5 is fixedly arranged in the inner cavity of the first female die 3. A spring 8 is arranged between the second female die 4 and the third female die 5, and the two ends of the spring 8 abut against the second female die 4 and the third female die 5, respectively.

[0034] The end of the second female die 4 away from the third female die 5 is provided with a forming cavity 10. The third female die 5 is provided with a guide hole 15 and an accommodating cavity 16. The guide hole 15 is arranged along the axial direction of the third female die 5, and the guide hole 15 penetrates through the third female die 5 towards the end of the second female die 4. The guide hole 15 is in communication with the accommodating cavity 16.

[0035] The identification mechanism includes a sensor 6 and a transmission rod 7. The sensor 6 is arranged in the accommodating cavity 16, and the transmission rod 7 is slidingly arranged in the guide hole 15.

[0036] The male die 1 is arranged towards the forming cavity 10. The male die 1 is installed on the output end of a driving mechanism. The driving mechanism is used to drive the male die 1 to reciprocate along the axial direction of the third female die 5.

[0037] In the embodiment, it is to be noted that, for a hollow cylindrical die with a thickness of about 10 mm, the first die 3 is made of die steel, the inner and outer surfaces of which are subjected to nitriding treatment, and has high hardness and high wear resistance; the second die 4 is cylindrical, and the second die 4 is made of wear-resistant high-hardness die steel, and the forming cavity 10 is subjected to polishing and titanium plating treatment, and has a smooth and hard surface, the shape and size of the forming cavity 10 are the same as the shape and size of the product part, but a fitting gap of about 0.2 mm is reserved to facilitate the product part to enter and exit the die cavity 10; the transmission rod 7 is a cylindrical solid rod, the transmission rod 7 is made of ordinary steel, and the transmission rod 7 can slide along the guide hole 15, and the transmission rod 7 is used to transmit the movement of the second die 4 to the sensor 6;

[0038] The sensor 6 is connected with the control circuit of the cold header, the sensor 6 is a contact position sensor, the sensor 6 outputs a high-level signal when being pressed, and outputs a low-level signal when not being pressed;

[0039] During processing, when the forming cavity 10 has the workpiece 2 to be formed, the second die 4 pushes the transmission rod 7 to press the sensor 6 when the punch 1 reaches the preset forming position to press the workpiece 2 in the forming cavity 10 to form, the sensor 6 outputs a high-level signal, indicating that there is no air hitting phenomenon; when the forming cavity 10 has no workpiece 2 to be formed, the second die 4 cannot push the transmission rod 7 to press the sensor 6 when the punch 1 reaches the preset forming position, the sensor 6 outputs a low-level signal, indicating that there is an air hitting phenomenon.

[0040] The technical effect achieved by the embodiment is that, by setting the recognition mechanism, the air hitting phenomenon can be found in time during processing, and the signal is transmitted to the cold header to stop and alarm, which can remind the on-site personnel in time by cooperating with the alarm, so as to take out the abnormal product, avoid the abnormal product mixed into the qualified product, greatly simplify the air hitting recognition work of the cold header during operation, automatically monitor the production process, avoid the loss caused by the air hitting of the cold header, and avoid the abnormal product mixed into the qualified product, and the effect is good after practical application.

[0041] Embodiment 2

[0042] As shown in Figures 1 to 7 Another cold header die structure for preventing air hitting provided by the embodiment is provided, which includes all the contents of the embodiment 1, and only the different parts will be described below.

[0043] In the embodiment, the forming cavity 10 is arranged along the axial direction of the second die 4, and the first ejection hole 11 is arranged along the axis of the second die 4 and penetrates the second die 4;

[0044] The third die 5 is provided with a second ejection hole 14 along its axis, the second ejection hole 14 penetrates the third die 5, and the second ejection hole 14 is coaxially arranged with the first ejection hole 11.

[0045] In the embodiment, it is to be noted that the ejection rod 9 is arranged at the output end of the driving assembly, the driving assembly adopts a telescopic pneumatic cylinder or a telescopic hydraulic cylinder, and the driving assembly is used to drive the ejection rod 9 to reciprocate along its axial direction; the ejection rod 9 is coaxially arranged with the first ejection hole 11, and the ejection rod 9 is matched with the first ejection hole 11 and the second ejection hole 14; specifically, the first ejection hole 11 and the second ejection hole 14 are both circular holes, and the ejection rod 9 is cylindrical.

[0046] Further, the working principle of the whole mold structure is as follows:

[0047] When the workpiece 2 to be processed has not yet entered the forming cavity 10 of the second die 4, the second die 4 is located at the rightmost position under the action of the spring, and the right end face of the second die 4 is flush with the right end face of the first die 3;

[0048] When the workpiece 2 to be processed is pushed by the punch 1 and moves from right to left and enters the second die 4, the spring 8 has not been compressed at this moment, and the position of the second die 4 has not been moved;

[0049] When the workpiece 2 to be processed completely enters the forming cavity 10 of the second die 4 and continues to be pushed by the punch 1 and moves from right to left, the second die 4 also starts to move from right to left at this moment, the spring 8 is compressed, and the transmission rod 7 also moves from right to left at the same time;

[0050] When the second die 4 and the third die 5 contact, the third die 5 pushes against the second die 4, so that the second die 4 can no longer continue to move to the left side, at this moment, the punch 1 continues to move from right to left, and the force applied by the punch 1 is all applied to the workpiece 2, so that the metal of the workpiece 2 is deformed, thereby obtaining the required product shape and size. At this moment, the transmission rod 7 has pushed the probe of the sensor 6, and the sensor 6 sends a high-level signal to the control circuit of the cold header. The control circuit is always monitoring the rotation of the main shaft of the equipment. In a specific main shaft rotation angle (the main shaft is driven to rotate by the motor, the main shaft controls the movement of the punch 1 by using a crank linkage mechanism in cooperation with a guide seat and a sliding block, specifically, the punch 1 is installed on the sliding block, the sliding block is slidably arranged on the guide seat, the output end of the crank linkage mechanism is connected with the sliding block, and the input end of the crank linkage mechanism is connected with the main shaft, the crank linkage mechanism converts the rotary motion of the main shaft into linear motion and transmits it to the punch 1, so as to make the punch 1 do linear reciprocating motion, which is prior art), when the control circuit receives the high-level signal sent by the sensor 6, it is determined that the equipment is running normally, the forming process of the product workpiece is stable and normal, and the equipment is allowed to continue to run;

[0051] When the workpiece 2 to be processed falls off the clamping device accidentally, the punch 1 moves from right to left, and there is no product workpiece in the forming cavity 10 of the second female die 4, so the punch 1 can only push the empty second female die 4 to move from right to left. When the main shaft angle of the device rotates to the fixed angle described above, since there is no workpiece 2 in the second female die 4, although the punch 1 moves to the position of the normal state, the second female die 4 does not move to the normal position from right to left, so the transmission rod 7 cannot move far enough to the left to trigger the sensor 6, and thus the sensor 6 still outputs a low-level signal at this moment. After the control circuit senses this situation, it can determine that the workpiece 2 has not entered the second female die 4, and an accident of accidental falling of the product workpiece has occurred, so the control circuit sends a stop signal to make the cold header stop production immediately, and an alarm is given to avoid the cold header from being operated empty, so as to avoid damage to the device and the die. After receiving the alarm signal, the operator can find the half-finished product workpiece that has just fallen off from the product output conveyor belt, so as to avoid mixing the half-finished product workpiece that has not completed the whole process into the normal workpiece;

[0052] When the product part completes the cold heading plastic deformation process, the punch 1 moves from left to right, and at this moment the second female die 4 also moves from left to right under the pushing action of the spring 8 until the right end faces of the second female die 4 and the first female die 3 are flush. Then the ejector rod 9 starts to act and moves from left to right to push the product workpiece out of the second female die 4 and drop it onto the finished product output conveyor belt.

[0053] The technical effect achieved by the embodiment is that the workpiece 2 processed is automatically ejected during processing by the setting of the ejector rod 9, so as to realize automatic discharge and automatic production, and the processing efficiency is higher.

[0054] Embodiment 3

[0055] As shown in Figures 1 to 7 Another cold header die structure for preventing empty operation provided by the embodiment is shown in the figure, which includes all the contents of the embodiment 1, and only the different parts will be described below.

[0056] In the embodiment, the third female die 5 includes a base body 12 and a guide segment 13, the guide segment 13 is arranged at one end of the base body 12, the guide segment 13 is coaxially arranged with the base body 12, and the spring 8 is sleeved on the guide segment 13. The spring 8 is a round wire section spring with moderate rigidity, and in the free state, the spring 8 pushes the second female die 4 to the right to make the right end face of the second female die 4 flush with the right end face of the first female die 3.

[0057] In the embodiment, it should be noted that the base body 12 and the guide segment 13 are both cylindrical, and the base body 12 and the guide segment 13 are an integral structure.

[0058] Although the present application has been described in detail with general description and specific embodiments above, it is obvious to those skilled in the art that some modifications or improvements can be made to the present application on the basis of the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application are within the scope of the present application.

[0059] The terms such as "upper", "lower", "left", "right", "middle" and the like cited in the present specification are merely for the convenience of clear description, and are not intended to limit the scope of the present application. The change or adjustment of the relative relationship without substantial change in the technical content is also considered as the scope of the present application.

Claims

1. A cold header die structure for preventing misfire, characterized by, The die assembly includes a first die (3), a second die (4) and a third die (5), the second die (4) is slidingly arranged in the inner cavity of the first die (3), the third die (5) is fixedly arranged in the inner cavity of the first die (3), a spring (8) is arranged between the second die (4) and the third die (5), and the two ends of the spring (8) are respectively in abutment with the second die (4) and the third die (5); The end of the second die (4) away from the third die (5) is provided with a forming cavity (10), the third die (5) is provided with a guide hole (15) and a containing cavity (16), the guide hole (15) is arranged along the axial direction of the third die (5), and the guide hole (15) penetrates through the third die (5) towards the end of the second die (4), and the guide hole (15) is in communication with the containing cavity (16); The identification mechanism includes a sensor (6) and a transmission rod (7), the sensor (6) is arranged in the containing cavity (16), and the transmission rod (7) is slidingly arranged in the guide hole (15); The punch (1) is arranged towards the forming cavity (10), the punch (1) is mounted on the output end of a driving mechanism, and the driving mechanism is used for driving the punch (1) to reciprocate along the axial direction of the third die (5); The sensor (6) is connected with the control circuit of the cold header, the sensor (6) adopts a contact type position sensor, the sensor (6) outputs a high level signal when being pressed, and the sensor (6) outputs a low level signal when not being pressed; During the processing, when the workpiece (2) to be formed is arranged in the forming cavity (10), when the punch (1) reaches a preset forming position and presses the workpiece (2) in the forming cavity (10) to form, the second die (4) pushes the transmission rod (7) to press the sensor (6), the sensor (6) outputs a high level signal, indicating that there is no idle punching phenomenon; when there is no workpiece (2) to be formed in the forming cavity (10), when the punch (1) reaches the preset forming position, the second die (4) cannot push the transmission rod (7) to press the sensor (6), the sensor (6) outputs a low level signal, indicating that there is an idle punching phenomenon.

2. A cold header die structure for preventing misfire according to claim 1, wherein The forming cavity (10) is arranged along the axial direction of the second die (4), and the second die (4) is provided with a first ejection hole (11) along the axial line thereof, and the first ejection hole (11) penetrates through the second die (4); The third die (5) is provided with a second ejection hole (14) along the axial line thereof, the second ejection hole (14) penetrates through the third die (5), and the second ejection hole (14) is coaxially arranged with the first ejection hole (11).

3. A cold header die structure for preventing misfire according to claim 2, wherein Further comprising an ejection rod (9) and a driving assembly, the ejection rod (9) is arranged at the output end of the driving assembly, the driving assembly is used for driving the ejection rod (9) to reciprocate along its axial direction; the ejection rod (9) is coaxially arranged with the first ejection hole (11), and the ejection rod (9) is matched with the first ejection hole (11) and the second ejection hole (14).

4. A cold header die structure for preventing misfire according to claim 3, wherein The driving assembly adopts a telescopic air cylinder or a telescopic hydraulic cylinder.

5. A cold header die structure for preventing misfire according to claim 3, wherein The first ejection hole (11) and the second ejection hole (14) are both circular holes, and the ejection rod (9) is cylindrical.

6. A cold header die structure for preventing misfire according to claim 1, wherein The third die (5) comprises a base body (12) and a guide section (13), the guide section (13) is arranged at one end of the base body (12), the guide section (13) is coaxially arranged with the base body (12), and the spring (8) is sleeved on the guide section (13).

7. A cold header die structure for preventing misfire according to claim 6, wherein The base body (12) and the guide section (13) are both cylindrical.

8. A cold header die structure for preventing misfire according to claim 1, wherein The first die (3) is cylindrical, and the second die (4) is cylindrical.

9. A cold header die structure for preventing misfire according to claim 1, wherein The transmission rod (7) is a cylindrical solid rod.

Images