Automatic stub bar removing mechanism of cold header

Abstract

The utility model provides an automatic stub bar removing mechanism of a cold header. The automatic stub bar removing mechanism comprises a rod material joint detecting device, a rod material length tracking and measuring device and a stub bar releasing device. The rod material length tracking and measuring device comprises two line pressing wheels which are symmetrically arranged on the two radial sides of a rod material, and one line pressing wheel is coaxially connected with an encoder. The material head releasing device is arranged in front of the axial direction of the rod material and comprises a lifting air cylinder, and the lifting air cylinder is in driving connection with a material clamp opening structure. According to the mechanism, the material head is sensed through the color code sensor, the length of the material head is measured through the encoder, finally, the material head is output through movement of the material clamp, material head removing is accurate without errors, and precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading machines, in particular to an automatic head removing mechanism of a cold heading machine. Background Art

[0002] The raw materials used in cold heading machines are mainly coils and rods. When the cold heading machine is in production, the length of the raw material cannot be an integer multiple of the length of a single blank, so there will always be a section of material that is not long enough. Especially when the raw material is rod, two rods are fed into the cold heading machine end to end. At the junction of the two rods, there will always be a head and tail of the material. The presence of the head and tail of the material can cause the following hazards:

[0003] 1. Easy to damage the mold;

[0004] 2. The transfer clamp is easily damaged;

[0005] 3. The tool is easily damaged;

[0006] 4. Cause waste of materials.

[0007] The existing technology for dealing with material head is to use a material stopper to detect the material head. When the material head is detected, the actuator that transports the blank is inoperative, and the blank is automatically dropped after being cut by the cutter. Because the material stopper is a mechanical sensor, it is prone to misjudgment when there is an error in the material stopper's travel. In addition, the actuator's inoperative structure makes the actuator's components complex to design and the production cost is high. Utility Model Content

[0008] In response to the above problems, the utility model provides an automatic head removal mechanism for a cold heading machine. The mechanism senses the head through a color code sensor, measures the length of the head through an encoder, and finally outputs the head through the movement of the material clamp. The head removal is accurate and error-free with high precision.

[0009] A cold heading machine automatic head removal mechanism includes a rod material joint detection device, a rod material length tracking and measuring device and a head release device; the rod material length tracking and measuring device includes two crimping wheels symmetrically arranged on both sides of the rod material radially, one of the crimping wheels is coaxially connected to an encoder; the head release device is arranged in front of the axial direction of the rod material, and the head release device includes a lifting cylinder, and the lifting cylinder is driven and connected to a material clamp opening structure.

[0010] Preferably, the rod joint detection device is a color code sensor.

[0011] Preferably, one of the two pressing wheels is a fixed pressing wheel fixedly connected to the frame, and the other is a dynamic pressing wheel that can move along the radial direction of the rod material, and the dynamic pressing wheel is slidably connected to the frame.

[0012] Preferably, a wire pressing wheel driving cylinder is arranged above the dynamic wire pressing wheel, and a reset structure is provided below the dynamic wire pressing wheel.

[0013] Preferably, the reset structure includes a pillar, a first reset spring is sleeved on the outside of the pillar, a mounting seat is connected above the first reset spring, the mounting seat is slidably connected to the pillar, and the side of the mounting seat is connected to the dynamic pressure wire wheel.

[0014] Preferably, the material clamp opening structure includes a push rod, which is slidably connected to the frame up and down, the lower end of the push rod is in contact with the lateral swing bracket, the middle part of the lateral swing bracket is hinged to the frame, and the end of the lateral swing bracket away from the push rod is connected to the upper clamp of the material clamp.

[0015] Preferably, a second return spring is provided below one end of the lateral swing bracket close to the push rod, and the second return spring is installed in a groove of the frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model uses a color mark sensor to sense the position of the rod material head, and uses a wire pressing wheel and an encoder to detect the distance of the material head. The material clamp opening structure enables the material clamp to move without clamping the waste material, thereby realizing accurate detection of the material head and cutting off and removing the material head under a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the implementation methods of the present invention, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of the utility model Figure 2 ;

[0021] Figure 3 This is the schematic diagram of the material head release device structure Figure 1 ;

[0022] Figure 4 This is the schematic diagram of the material head release device structure Figure 2 ;

[0023] Figure 5 This is a diagram of the rod length tracking and measuring device Figure 1 ;

[0024] Figure 6 This is a diagram of the rod length tracking and measuring device Figure 2 ;

[0025] In the figure, 1. Lifting cylinder, 2. Main mold base, 3. Rod material joint detection device, 4. Rod material a, 5. Rod material b, 6. Rod material length tracking and measuring device, 7. Dynamic pressure wheel, 8. Pressure wheel driving cylinder, 9. Fixed pressure wheel, 10. First return spring, 11. Encoder, 12. Adjustment base, 13. Mounting seat 14. Cutting knife, 15. Material end ejection position, 16. Press plate, 17. Ejector rod, 18. Horizontal swing bracket, 19. Second return spring, 20. Material clamp. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] like Figure 1-6 As shown, the present invention discloses an automatic stock head removal mechanism for a cold heading machine. The mechanism includes a stock joint detection device 3, a stock length tracking and measurement device 6, and a stock head release device. The stock joint detection device is a color code sensor, the base of which is fixedly connected to the main die base 2, with the detection end of the color code sensor facing the stock. The stock joint is pre-dyed. During the stock feeding process, when the stock joint (i.e., the connection between the tail of the preceding stock a4 and the head of the following stock b5) passes the color code sensor, the color code sensor can identify the color of the joint and detect the joint. After detecting the joint color, the color code sensor sends a signal to the control system to determine the position of the joint.

[0028] The rod material length tracking and measuring device 6 includes a fixed pressure wire wheel 9 installed below the rod material b5 and fixedly connected to the frame in a straight line direction, and a dynamic pressure wire wheel 7 installed above the rod material b5 and slidably connected to the frame in a straight line direction. Both the fixed pressure wire wheel and the dynamic pressure wire wheel can rotate around the installation axis. The fixed pressure wire wheel 9 is coaxially connected to an encoder 11, which is a rotary encoder. A pressure wire wheel driving cylinder 8 is arranged above the dynamic pressure wire wheel 7, and the execution end of the pressure wire wheel driving cylinder is connected to the mounting seat 13. The dynamic pressure wire wheel 7 is installed on the side of the mounting seat. A reset structure is provided below the dynamic pressure wire wheel 9. The reset mechanism includes a pillar, a first reset spring 10 is sheathed on the outside of the pillar, a mounting seat 13 is connected above the first reset spring, and the mounting seat is slidably connected to the pillar.

[0029] When the control system receives a signal from the joint detection device, it uses the bar length tracking and measurement device 6 to measure the feed length after receiving the signal in real time, thereby determining the real-time distance between the joint and the cutting blade. When the feed length equals the distance between the joint detection device and the cutting blade 14, the head and tail separation device is activated. The tracking and measurement device works by using the linear motion of the bar to drive the rotation of the pressing rollers on both sides. A rotary encoder is connected behind the pressing rollers, which converts the rotation of the pressing rollers into pulse outputs. After receiving the pulses from the rotary encoder, the control system calculates the distance the bar has moved in real time, thereby obtaining the real-time distance between the bar joint and the cutting blade.

[0030] The material head release device includes a lifting cylinder 1, which drives the material clamp opening mechanism below. This mechanism includes a push rod 17, which is connected to the frame for vertical sliding movement. The lower end of the push rod 17 is in contact with a lateral swing bracket 18, which is hinged to the frame at its midsection. The end of the lateral swing bracket 18, distal from the push rod 17, is connected to the upper clamp of the material clamp 20. A second return spring 19 is installed below the end of the lateral swing bracket 18, near the push rod 17. This second return spring 19 is installed in a groove in the frame.

[0031] When the rod-material joint reaches the cutting knife 14, the cutting knife 14 will cut off the material head. At this time, the lifting cylinder 1 that controls the opening of the material clamp 20 is pressed down, and the material clamp 20 is opened through the linkage of the push rod 17 and the horizontal swing bracket 18. In this way, when the joint is pushed into the material clamp, the material clamp cannot clamp the material segment, and the material segment falls into the waste box, completing the separation of the material head, material tail and normal products.

[0032] Rod material a4 and rod material b5 move along the axis toward the cutting knife 1. When the joint of the two rod materials ( Figure 1 When a color mark sensor (the black portion in the middle) passes through it, it detects the color change and sends a signal to the control system. The color mark sensor is mounted behind the main mold base and is a fixed distance from the cutting blade 14. This distance also corresponds to the distance between the tail end of rod a4 and the head end of rod b5 and the cutting blade 14.

[0033] The rod material length tracking and measuring device is installed at the feed port. The dynamic pressure wheel 7 is mounted on the mounting seat 13. Below the mounting seat 13 is the first return spring 10, and above it is the pressure wheel drive cylinder 8. When the pressure wheel drive cylinder 8 retracts, the mounting seat 13 is supported by the first return spring 10, and the dynamic pressure wheel 7 is separated from the fixed pressure wheel 9. When the control system receives the signal from the color code sensor, it controls the pressure wheel drive cylinder 8 to extend and press the mounting seat 13 down, thereby pressing the rod material b5 against the fixed pressure wheel 9. The encoder 11 is coaxially installed with the fixed pressure wheel 9. When the rod material b5 moves along the axis, the friction force drives the fixed pressure wheel 9 to rotate. The encoder 11 sends the angle of rotation of the fixed pressure wheel 9 to the control system in the form of pulses. The control system calculates the distance moved by the rod material b5 based on the received pulses. This determines the real-time distance between the rod material joint and the cutting knife 1. This distance is the key to determining when to remove the hopper.

[0034] When the control system detects that the rod-material joint reaches the position of the cutting knife 14, the lifting cylinder 1 extends, and the lifting cylinder 1 drives the pressure plate 16 to press the push rod 17 down. The push rod 17 is pressed on the lateral swing bracket 18, and the lateral swing bracket 18 can rotate around the axis and has a second return spring 19 installed underneath. When the push rod 17 is pressed down, the lateral swing bracket 18 rotates counterclockwise around the axis to open the material clamp 20. When the rod-material joint passes through the cutting knife 14, it is cut off by the cutting knife and sent to the position of the material clamp 20. At this time, since the material clamp 20 is in an open state, the material segment cannot be clamped when it is pushed into the material clamp 20, and the material segment finally falls into the waste box, thus completing the separation of the material head, material tail and normal material segment.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automatic head removal mechanism for a cold heading machine, characterized in that: It includes a rod material joint detection device, a rod material length tracking and measuring device and a material head release device; the rod material length tracking and measuring device includes two crimping wheels symmetrically arranged on both sides of the radial direction of the rod material, one of which is coaxially connected to an encoder; the material head release device is arranged in the axial front of the rod material, and the material head release device includes a lifting cylinder, and the lifting cylinder is driven and connected to a material clamp opening structure.

2. The automatic head removal mechanism of a cold heading machine according to claim 1, characterized in that: The rod material joint detection device is a color code sensor.

3. The automatic head removal mechanism of a cold heading machine according to claim 1, characterized in that: One of the two pressing wheels is a fixed pressing wheel fixedly connected to the frame, and the other is a dynamic pressing wheel that can move along the radial direction of the rod material. The dynamic pressing wheel is slidably connected to the frame.

4. The automatic head removal mechanism of a cold heading machine according to claim 3, characterized in that: A wire pressing wheel driving cylinder is arranged above the dynamic wire pressing wheel, and a reset structure is arranged below the dynamic wire pressing wheel.

5. The automatic head removal mechanism of a cold heading machine according to claim 4, characterized in that: The reset structure includes a pillar, a first reset spring is sleeved on the outside of the pillar, a mounting seat is connected above the first reset spring, the mounting seat is slidably connected to the pillar, and a side surface of the mounting seat is connected to a dynamic pressure wire wheel.

6. The automatic head removal mechanism of a cold heading machine according to claim 1, characterized in that: The material clamp opening structure includes a push rod, which is slidably connected to the frame up and down, the lower end of the push rod is in contact with the lateral swing bracket, the middle part of the lateral swing bracket is hinged to the frame, and the end of the lateral swing bracket away from the push rod is connected to the upper clamp of the material clamp.

7. The automatic head removal mechanism of a cold heading machine according to claim 6, characterized in that: A second return spring is provided below one end of the lateral swing bracket close to the push rod, and the second return spring is installed in the groove of the frame.

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