Cold header auxiliary clamping and conveying device and method for part production

Abstract

The invention provides a cold header auxiliary clamping and conveying device for part production, which specifically comprises a connecting plate fixed on a female die cavity; the cylinder pressing plate is fixedly connected with the connecting plate; the double-rod air cylinder is fixed on the connecting plate through an air cylinder pressing plate; the piston is connected with the double-rod air cylinder, and a short spring piece is installed on the outer side of the piston; the double-rod air cylinder is connected with an air path control system to control periodic motion of the piston so as to complete auxiliary clamping and conveying of the short spring piece to the cold heading part. The auxiliary clamping and conveying device with the short spring pieces is creatively provided for production of cold heading parts, the production operation efficiency is improved, collision is avoided, the qualification rate of the cold heading parts is increased, and device faults are more convenient to maintain and adjust.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts production, and in particular to an auxiliary clamping and conveying device and method of a cold heading machine for parts production. Background Art

[0002] When producing parts of certain special shapes on a cold heading machine, such as a small pancake shape, when the part is ejected from the mold after cold heading, the clamp's jaws are required to clamp the flange outer circle of the part. Due to the irregular shape of the outer circle of the part and partial collapse, the two cannot contact well, resulting in the part not being stably clamped by the clamp, resulting in the part falling or deflecting, and the clamping failure.

[0003] At present, some cold heading machines are equipped with a die front stopper to avoid this problem. That is, a baffle is set in front of the die cavity, which can stop the parts from falling when the parts are ejected from the die. Then, after the clamp clamps the cold heading parts, the baffle is removed. However, the existing die front stoppers are all mechanical transmission methods, and their movement is driven by the power transmitted by the cold heading machine spindle. Through the meshing of gears, the auxiliary shaft is driven to rotate. There is a cam on the auxiliary shaft, which pushes the transmission rod to transmit power to the die front stopper, driving it to move up and down or rotate. The overall mechanical parts exceed 100 pieces, and the structure is very complicated, resulting in a high failure rate. At the same time, since most of the parts are installed inside the equipment, the space is very small and maintenance is very inconvenient.

[0004] For different cold heading parts, the blocking action of the front die stopper needs to be adjusted accordingly. The existing front die stopper devices are all implemented with mechanical structures. The mechanism is complex and the adjustment work is very cumbersome. It is necessary to rotate the conjugate cam plate, etc. There is no scale. It all depends on the operator's experience and feeling. It is dangerous and difficult, the adjustment takes a long time, and the possibility of accidents is relatively high. Summary of the invention

[0005] The invention provides an auxiliary clamping and conveying device and method for a cold heading machine used for parts production, which realizes the safe and efficient production and transportation of cold heading parts.

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

[0007] An auxiliary clamping and feeding device for a cold heading machine used for parts production is characterized by comprising: a connecting plate fixed on a die cavity;

[0008] The cylinder pressure plate is connected and fixed to the connecting plate;

[0009] Double-rod cylinder, fixed on the connecting plate through the cylinder pressure plate;

[0010] A piston is connected to a double-rod cylinder and a short spring sheet is installed on the outside of the piston;

[0011] Exemplarily, the double-rod cylinder is connected to an air circuit control system to control the periodic motion of the piston to complete the auxiliary clamping and feeding of the cold-headed parts by the short spring sheet.

[0012] Exemplarily, the air circuit control system includes a PLC controller, an angle encoder, and a solenoid valve, wherein the PLC controller controls the switch of the solenoid valve by reading the spindle angle of the cold heading machine in the angle encoder.

[0013] Exemplarily, the solenoid valve is connected to a double-bar cylinder, and the double-bar cylinder performs forward / reverse inflation by opening / closing the solenoid valve.

[0014] Exemplarily, the PLC controller is also used to monitor the periodic movement of the double-rod cylinder. If the double-rod cylinder does not operate according to the rules of the set angle range, the operation of the device is stopped and an early warning is issued.

[0015] The second aspect also provides a cold heading machine auxiliary clamping method for parts production, characterized in that any device of claims 1-4 is used to perform the clamping operation, including:

[0016] S1. When the spindle running angle of the cold heading machine is in the first set angle range, the PLC controller controls the solenoid valve to inflate the double-bar cylinder, the piston retracts, and the short spring sheet is always kept in the right limit position;

[0017] S2, when the spindle running angle of the cold heading machine is within the second set angle range, the PLC controller controls the solenoid valve to reversely inflate the double-bar cylinder, and the piston drives the short spring sheet to move to the left extreme position, and at the same time, the cold heading part in the die mold is pushed out and contacts the short spring sheet, and the short spring sheet is squeezed and deformed to complete the elastic blocking of the cold heading part;

[0018] S3, the clamp system clamps and transports the cold heading product to the next processing position;

[0019] S4. When the spindle running angle of the cold heading machine is within the third set angle range, the PLC controller controls the solenoid valve to inflate the double-bar cylinder, and the piston drives the short straight spring sheet to move to the right end to avoid blocking the movement of the cold heading parts and the punch.

[0020] Exemplarily, in the steps S1-S4, the PLC controller is also used to monitor the periodic movement of the double-rod cylinder. If the double-rod cylinder does not operate regularly within the set angle range, the device is stopped and an early warning is issued.

[0021] The beneficial effects of the present invention are as follows: first, it ensures the stable and smooth operation of the clamp transportation system; second, it ensures that the cold-headed parts are processed without collision, thereby increasing the service life of the parts and the production qualification rate of the products; third, the entire parts transportation process is fully automatically mechanically handled, which greatly improves the production efficiency and controls the production cost; fourth, compared with the existing irregular cold-headed parts production process, it is safer; fifth, the setting of the short spring sheet makes the maintenance and adjustment of the equipment more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the auxiliary clamping and conveying device of the cold heading machine of the present invention.

[0023] Figure 2 It is a schematic diagram of the cylinder pressing plate of the auxiliary clamping and feeding device of the cold heading machine of the present invention.

[0024] Figure 3 Schematic diagram of the connecting plate of the auxiliary clamping and conveying device of the cold heading machine of the present invention

[0025] Figure 4 It is a schematic diagram of the device of the cold heading machine of the present invention with the operating angle being within the second angle range.

[0026] Figure 5 It is a schematic diagram of the process of the auxiliary clamping and conveying method of the cold heading machine of the present invention.

[0027] Figure 6 This is a schematic diagram of the cold heading parts transported by the auxiliary clamping and conveying device of the cold heading machine of the present invention. DETAILED DESCRIPTION

[0028] In order to more clearly understand the content of the present invention, it will be described in detail with reference to the drawings and embodiments.

[0029] The accompanying drawings in the specification of the present invention include: 1-cylinder pressure plate; 2-double-bar cylinder; 3-connecting plate; 4-piston; 5-short spring leaf; 6-cold heading machine body; 7-die cavity; 8-clamp; 9-die mold; 10-cold heading parts.

[0030] The first aspect relates to an auxiliary clamping and feeding device for a cold heading machine used in parts production, which is implemented as follows: Figure 1 , 2 As shown in 3, it includes: a connecting plate 3, fixed on the female mold cavity 7;

[0031] The cylinder pressure plate 1 is connected and fixed to the connecting plate 3;

[0032] The double-rod cylinder 2 is fixed on the connecting plate 3 through the cylinder pressure plate 1;

[0033] The piston 4 is connected to the double-rod cylinder 2, and a short spring sheet 5 is installed on the outside of the piston 4;

[0034] Exemplarily, the double-rod cylinder 2 is connected to an air circuit control system to control the periodic motion of the piston 4 to complete the auxiliary clamping and feeding of the cold-headed part 10 by the short spring sheet 4 .

[0035] Exemplarily, the cold heading parts are flange-type cold heading parts and / or flat irregular cold heading parts.

[0036] Exemplarily, the cold heading parts are flange-type cold heading parts and / or flat irregular cold heading parts.

[0037] Specifically, the connecting plate 3 is directly fixed to the die cavity 7, and the fixing method can be bolts and screws. The connecting plate 3 is provided with multiple supporting positions for placing the double-rod cylinder 2, and is also provided with holes fixed to the cylinder pressure plate 1. The supporting positions of the connecting plate 3 and the cylinder pressure plate 1 jointly fix the double-rod cylinder 2; the short spring sheet 5 itself has a certain elasticity, and is installed on the piston 4 of the double-rod cylinder 2 through fasteners. The air circuit control system (not shown in the figure) and the solenoid valve (not shown in the figure) cooperate with each other to control the double-rod cylinder 2 to drive the piston 4 to perform periodic motion to assist the clamp system to smoothly clamp and transport the cold heading parts 10 for production. Among them, Figure 6 As shown, the shape of the cold heading part 10 is generally a flange that is difficult to clamp and\or a flat irregular cold heading part, a cold heading part that is difficult to clamp.

[0038] Exemplarily, the air circuit control system includes a PLC controller, an angle encoder, and a solenoid valve, wherein the PLC controller controls the switch of the solenoid valve by reading the spindle angle of the cold heading machine in the angle encoder.

[0039] Exemplarily, the solenoid valve is connected to a double-bar cylinder, and the double-bar cylinder performs forward / reverse inflation by opening / closing the solenoid valve.

[0040] Specifically, the normal operating speed of the cold heading machine is 30-100 working cycles / minute. During operation, the spindle of the cold heading machine rotates continuously, and the crank slider mechanism is used to push the punch mold (not shown in the figure) to reciprocate back and forth to complete the cold heading extrusion work. According to industry practice, the punch mold is at the position farthest from the die mold 9, and the corresponding spindle angle at this moment is 0 degrees. When the punch mold moves forward and reaches the closest distance to the die mold 9, the corresponding spindle angle at this moment is 180 degrees. After that, the punch mold moves backward, and finally returns to the position where the punch mold is farthest from the die mold 9. At this moment, the spindle angle is 360 degrees. This cycle of movement completes the continuous production of parts.

[0041] The PLC controller of this device reads the rotation angle of the cold heading machine spindle in real time through the angle encoder, grasps the operating status of the cold heading machine, and controls the switch of the solenoid valve according to the predetermined program based on the spindle angle, thereby driving the periodic movement of the short spring sheet.

[0042] like Figure 1 As shown, when the operating angle of the cold heading machine read by the angle encoder is within the first set angle range, which is set within the range of 0-200 degrees in this embodiment, the PLC controller controls the solenoid valve to inflate the double-rod cylinder 2, and the piston 4 retracts and always maintains the right end position. At this time, the short spring sheet 5 is in the rightmost state, and the cold heading part 10 and the punch mold (not shown in the figure) can freely enter the die mold 9, and the short spring sheet 5 does not have any obstruction to their movement.

[0043] like Figure 4 As shown, when the cold heading machine operating angle is within the second set angle range, which is set to 201-310 degrees in this embodiment, the PLC controller (not shown) controls the solenoid valve (not shown) to reversely inflate the double-rod cylinder 2, and the piston 4 extends in a very short time, driving the short spring sheet 4 to move to the left until it reaches the leftmost limit position. The cold heading part 10 formed by cold heading in the concave die 9 has been formed and is pushed out of the concave die 9 by the ejection device, just in contact with the short spring sheet 5. Due to the obstruction and elastic deformation of the short straight spring sheet 5, the cold heading part 10 is prevented from falling. At this time, the clamp system firmly clamps the part, and the force applied by the short spring sheet 5 prevents the cold heading part 10 from flipping and tilting during the closing of the clamp.

[0044] When the cold heading machine operates at a third set angle range, which is set at 301-360 degrees in this embodiment, the PLC controller controls the solenoid valve to positively inflate the double-rod cylinder 2, and the piston 4 retracts within a certain period of time, driving the short spring sheet 5 to move to the right end to avoid blocking the movement of the cold heading part 10 and the punch.

[0045] Exemplarily, the PLC controller is also used to monitor the periodic movement of the double-rod cylinder. If the double-rod cylinder does not operate according to the rules of the set angle range, the operation of the device is stopped and an early warning is issued.

[0046] Specifically, the PLC controller monitors the movement of the double-rod cylinder 2. Once an unexpected situation occurs, the cylinder cannot move according to the set program of the PLC controller and immediately stops and alarms, thereby preventing collision accidents and ensuring the safety of the entire machine.

[0047] Another aspect of the present invention also relates to a cold heading machine auxiliary clamping method for parts production, characterized in that the clamping operation is performed by using any device of claims 1-4, such as Figure 5 As shown, including:

[0048] S1. When the spindle running angle of the cold heading machine is in the first set angle range, the PLC controller controls the solenoid valve to inflate the double-bar cylinder, the piston retracts, and the short spring sheet is always kept in the right limit position;

[0049] S2, when the spindle running angle of the cold heading machine is within the second set angle range, the PLC controller controls the solenoid valve to reversely inflate the double-bar cylinder, and the piston drives the short spring sheet to move to the left extreme position, and at the same time, the cold heading part in the die mold is pushed out and contacts the short spring sheet, and the short spring sheet is squeezed and deformed to complete the elastic blocking of the cold heading part;

[0050] S3, the clamp system clamps and transports the cold heading product to the next processing position;

[0051] S4. When the spindle running angle of the cold heading machine is within the third set angle range, the PLC controller controls the solenoid valve to inflate the double-bar cylinder, and the piston drives the short straight spring sheet to move to the right end to avoid blocking the movement of the cold heading parts and the punch.

[0052] Exemplarily, in the steps S1-S4, the PLC controller is also used to monitor the periodic movement of the double-rod cylinder. If the double-rod cylinder does not operate regularly within the set angle range, the device is stopped and an early warning is issued.

[0053] Exemplarily, the cold heading parts are flange-type cold heading parts and / or flat irregular cold heading parts.

[0054] By using this method, the above-mentioned device can be executed and the corresponding technical effects can be achieved to ensure the safety of clamping and transporting cold-headed parts.

[0055] 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. An auxiliary clamping and feeding device for a cold heading machine used in parts production, characterized in that: It includes: a connecting plate, fixed on the die cavity; The cylinder pressure plate is connected and fixed to the connecting plate; Double-rod cylinder, fixed on the connecting plate through the cylinder pressure plate; A piston is connected to a double-rod cylinder and a short spring sheet is installed on the outside of the piston; The double-rod cylinder is connected to an air circuit control system to control the periodic movement of the piston, so as to complete the auxiliary clamping and feeding of the cold-forged parts by the short spring sheet.

2. The device according to claim 1, characterized in that: The air circuit control system includes a PLC controller, an angle encoder, and a solenoid valve, wherein the PLC controller controls the switch of the solenoid valve by reading the spindle angle of the cold heading machine in the angle encoder.

3. The device according to claim 2, characterized in that: The solenoid valve is connected to the double-bar cylinder, and the double-bar cylinder performs forward / reverse inflation through the opening / closing of the solenoid valve.

4. The device according to claim 3, characterized in that: The PLC controller is also used to monitor the periodic movement of the double-rod cylinder. If the double-rod cylinder does not operate according to the rules of the set angle range, the device will be stopped and an early warning will be issued.

5. The device according to any one of claims 1 to 4, characterized in that: The cold heading parts are flange-type cold heading parts and / or flat-type irregular cold heading parts.

6. A cold heading machine auxiliary clamping method for parts production, characterized in that: The pinching operation is performed using any device of claims 1-5, comprising: S1. When the spindle running angle of the cold heading machine is in the first set angle range, the PLC controller controls the solenoid valve to inflate the double-bar cylinder, the piston retracts, and the short spring sheet is always kept in the right limit position; S2, when the spindle running angle of the cold heading machine is within the second set angle range, the PLC controller controls the solenoid valve to reversely inflate the double-bar cylinder, and the piston drives the short spring sheet to move to the left extreme position, and at the same time, the cold heading part in the die mold is pushed out and contacts the short spring sheet, and the short spring sheet is squeezed and deformed to complete the elastic blocking of the cold heading part; S3, the clamp system clamps and transports the cold heading product to the next processing position; S4. When the spindle running angle of the cold heading machine is within the third set angle range, the PLC controller controls the solenoid valve to inflate the double-bar cylinder, and the piston drives the short straight spring sheet to move to the right end to avoid blocking the movement of the cold heading parts and the punch.

7. The method according to claim 6, characterized in that: In the steps S1-S4, the PLC controller is also used to monitor the periodic movement of the double-rod cylinder. If the double-rod cylinder does not operate according to the rules of the set angle range, the operation of the device is stopped and an early warning is issued.

8. The method according to claims 6-7, characterized in that: In the steps S1-S4, the cold heading parts are flange-type cold heading parts and / or flat-type irregular cold heading parts.

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