Door ring welding wire penetration state detection device

Abstract

The invention relates to the technical field of welding equipment, in particular to a door ring welding wire penetration state detection device which comprises a wire feeding cylinder, the wire feeding cylinder comprises an input end and an output end, an annular proximity switch is installed in the wire feeding cylinder, a detection piece is arranged on the wire feeding cylinder in a sliding mode, and an inclined included angle is formed between the detection piece and the axis of the wire feeding cylinder. A driving assembly is arranged on the wire feeding cylinder, a lap joint piece is rotationally installed in the wire feeding cylinder, a torsional spring is arranged on the lap joint piece, a power source is further arranged outside the wire feeding cylinder, the detection piece is connected with the negative electrode of the power source, the lap joint piece is connected with the positive electrode of the power source, a first shunt is arranged on the detection piece, and a processing unit is further arranged outside the wire feeding cylinder. The first shunt, the driving assembly, the annular proximity switch and the power supply are all electrically connected with the processing unit. An intelligent sensing system is composed of the detection piece, the lap joint piece, the power source, the first shunt and the processing unit, it is ensured that the welding wire can stretch out by enough length before welding, and it is ensured that no missing welding problem occurs when equipment is started.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a door ring welding wire penetration state detection device. BACKGROUND

[0002] Before assembling the door, the door ring matching the door needs to be welded on the frame. During the processing of the door ring, the plate material needs to be laser welded. During the laser welding process, the laser head emits a high-energy laser beam at the welding position, and the wire feeding assembly continuously feeds the welding wire to the welding position. The high-energy laser beam emitted by the laser head melts the welding wire at the welding position, and the melted welding wire fixes the plate material together.

[0003] During the welding of the door ring, the delivery of the welding wire is crucial. If the welding wire cannot be stably delivered to the welding position, it will cause the welding equipment to be empty during the welding process, wasting production time. Moreover, during the empty welding process, the high-energy laser beam emitted by the laser head will also damage the plate material, and even if it is re-welded, it is easy to form a defective product, which is not conducive to the control of product quality.

[0004] In order to solve the above-mentioned empty welding situation and ensure that the welding wire is effectively delivered to the welding position during welding, the existing technical solution is to set a proximity switch at one end of the welding wire feeding cylinder near the laser head, and to determine whether the welding wire is effectively delivered to the inside of the welding wire feeding cylinder through the proximity switch. The above-mentioned method can determine whether the welding is effective through the proximity switch, and can stop the welding and adjust the equipment in time when the welding wire delivery is abnormal, thereby reducing the occurrence of empty welding to a certain extent.

[0005] However, since the high-energy laser beam generates high temperature during laser welding, and the melted welding wire may also splash during welding, the position of the proximity switch in the above-mentioned solution cannot be too close to the welding position. As a result, a problem arises, that is, although the welding wire is detected by the proximity switch before welding, the delivery position of the welding wire does not meet the requirements. Therefore, during the initial stage of laser welding, empty welding occurs. Even if the welding wire is delivered to the welding position by the wire feeding assembly in the subsequent production, re-welding operation is still required. Secondly, before welding, although the proximity switch detects that the welding wire has been delivered to the inside of the feeding cylinder, if the length of the welding wire is too long, the long welding wire will be squeezed with the welding position when the equipment automatically aligns the welding position, causing the welding wire to bend, which may cause the subsequent welding wire to be unable to be smoothly delivered to the welding position according to the designed route, thereby causing empty welding.

[0006] Therefore, a door ring welding wire penetration state detection device is proposed to ensure that the welding wire is smoothly delivered to the specified position and prevent empty welding. SUMMARY

[0007] The door ring welding wire penetration state detection device is used for solving the problem of empty welding of the door ring in the automatic welding process.

[0008] To achieve the above object, the present application provides the following technical scheme: A door ring welding wire penetration state detection device, comprising a wire feeding cylinder for conveying welding wire, the wire feeding cylinder is circular, the wire feeding cylinder comprises an input end and an output end, an annular proximity switch is fixedly installed inside the input end of the wire feeding cylinder, the detection ring of the annular proximity switch is coaxially arranged with the wire feeding cylinder, the welding wire coaxially passes through the detection ring of the annular proximity switch from the input end and extends into the wire feeding cylinder, a detection sheet is slidably arranged on the outer wall of the output end of the wire feeding cylinder, the detection sheet is made of metal material, the detection sheet is insulatedly connected with the wire feeding cylinder, one end of the detection sheet towards the output end is a detection end, an inclined angle is formed between the detection sheet and the axis of the wire feeding cylinder, a driving assembly is arranged on the wire feeding cylinder, a lap piece is rotatably installed inside the wire feeding cylinder, the lap piece is a metal sheet, a torsional spring is arranged at the hinged position of the lap piece and the wire feeding cylinder, the torsional spring is used for keeping the lap piece lapped on the welding wire, a power supply is further arranged outside the wire feeding cylinder for providing current for the lap piece, a first shunt for detecting the current signal of the detection sheet is arranged on the detection sheet, a processing unit is further arranged outside the wire feeding cylinder, and the first shunt, the driving assembly, the annular proximity switch and the power supply are electrically connected with the processing unit.

[0009] The welding wire is input from the input end of the wire feeding assembly to the inside of the wire feeding cylinder, and extends out of the wire feeding cylinder to the welding position from the output end of the wire feeding cylinder. When the welding wire enters the inside of the wire feeding cylinder, the lap piece can rotate to avoid the welding wire.

[0010] One end of the detection sheet away from the detection end is connected with the negative electrode of the power supply, and the lap piece is connected with the positive electrode of the power supply. The driving assembly is a device or mechanism that can bring the body to move linearly, and the detection end of the detection sheet can be pushed to approach or move away from the axis of the wire feeding cylinder through the driving assembly. Since the detection sheet and the axis of the wire feeding cylinder form an inclined angle, when the detection end coincides with the axis of the wire feeding cylinder, there will be a certain extension distance between the detection end and the end face of the output end of the wire feeding cylinder, and the length of the extension distance can be set to determine the length of the welding wire required to be extended when welding.

[0011] The scheme forms an intelligent sensing system through the power supply, the processing unit, the driving assembly, the detection sheet and the lap piece, which can help to automatically detect the extension length of the welding wire, and can form an intelligent welding system together with the laser welding equipment, thereby improving the intelligent degree of the welding equipment and ensuring that the welding wire can extend to the specified length before the welding equipment welds the door ring, so as to ensure that the welding wire can extend to the welding position and avoid the empty welding, and the quality of the welded door ring product is stable.

[0012] Preferably, the detection sheet is an elastic metal sheet, the outer part of the wire feeding cylinder is provided with a sliding sleeve, the sliding sleeve is made of plastic material, one end of the sliding sleeve extends out of the output end and forms an inclined angle with the axis of the wire feeding cylinder, the other end of the sliding sleeve is parallel to the axis of the wire feeding cylinder and is fixed to the outer wall of the wire feeding cylinder, the two ends of the sliding sleeve are smoothly connected, one end of the output end of the sliding sleeve is provided with a first guide groove, the first guide groove is parallel to one end of the output end of the sliding sleeve, one end of the sliding sleeve fixed to the outer part of the wire feeding cylinder is provided with a second guide groove, the second guide groove is parallel to the axis of the wire feeding cylinder, the first guide groove and the second guide groove are connected and smoothly connected, and the detection sheet is slidably installed in the first guide groove and the second guide groove.

[0013] The detection sheet is an elastic metal sheet that can be elastically deformed. By providing a sliding sleeve and a first guide groove and a second guide groove inside the sliding sleeve, the detection sheet can change direction under the guidance of the first guide groove and the second guide groove when sliding inside the first guide groove and the second guide groove. This not only ensures that the detection sheet can be tilted and extended to the designated position, but also reduces the occupied space of the detection sheet when it is retracted, which helps to ensure the miniaturization of the equipment and avoids interference between the detection sheet and other workpieces during welding.

[0014] The material of the sliding sleeve is plastic, which has low processing and material costs. In addition, the self-lubricating effect of plastic can be used to reduce the resistance when the detection sheet slides.

[0015] Preferably, the driving assembly is an electric push rod, the electric push rod is fixed to the outer part of the wire feeding cylinder parallel to the axis of the wire feeding cylinder, and one end of the detection sheet opposite to the detection end is fixedly connected to the push rod output head of the electric push rod. The electric push rod as a driving assembly has the advantages of high precision and strong controllability. During the extension of the detection sheet, it can avoid the collision between the detection sheet and the welding wire caused by the rapid extension of the detection sheet, and avoid the situation that the welding wire cannot be correctly extended to the welding position due to the collision of the detection sheet during the extension of the detection sheet, which ensures the stability of the equipment during use. In addition, during the retraction of the detection sheet, the retraction speed of the electric push rod can be controlled to quickly retract the detection sheet, avoiding laser damage to the detection sheet.

[0016] Preferably, the wire feeding cylinder is provided with a metal ring, the metal ring is conductively connected to the negative electrode of the power supply, the metal ring is coaxially fixed to the inside of the wire feeding cylinder through a connecting rod, the connecting rod is made of insulating material, the welding wire passes through the inner ring of the metal ring, the distance between the inner wall of the inner ring of the metal ring and the outer wall of the welding wire is 3mm-5mm, a second shunt for detecting the current signal on the metal ring is fixedly installed on the connecting rod, and the second shunt is electrically connected to the processing unit.

[0017] The welding wire passes through the center of the metal ring, and the welding wire is not in contact with the metal ring in the normal state. When the welding wire is delivered too fast during welding, the welding wire fails to melt under the laser beam, and the welding wire will abut against the door ring workpiece at the welding position, and the subsequent welding wire will be skewed, so that the welding wire will be in contact with the metal ring, and the subsequent welding wire will also be skewed and unable to be stably delivered to the welding position. At this time, the metal ring, the welding wire and the lap piece form a second current loop. After the current is detected by the current divider, an electrical signal is transmitted to the processing unit, and the processing unit controls the buzzer to sound an alarm, so that the worker can check the welding equipment, and avoid the situation of empty welding after the welding wire is skewed.

[0018] In addition, when the welding wire collides with foreign matter during welding and is skewed and in contact with the metal ring, a second current loop is also formed, and an alarm is issued to ensure the welding quality of the door ring product.

[0019] The distance between the inner ring side wall of the metal ring and the outer wall of the welding wire is set to 3-5mm, which leaves a certain margin to avoid false touch caused by the jumping of the welding wire itself during delivery, and also ensures that the welding wire can be found in time when it is skewed.

[0020] The metal ring is used to judge the state of the welding wire during welding, to ensure that the welding wire does not collide with foreign matter during welding to cause skewing, and to ensure that the welding wire can be stably delivered to the welding position to avoid empty welding.

[0021] Preferably, a temperature sensor is fixedly installed on the lap piece, the temperature sensor is a patch type temperature sensor, the temperature sensor is used to detect the temperature of the lap piece, and the temperature sensor is electrically connected with the processing unit.

[0022] The lap piece is lapped on the welding wire during welding, the welding wire transmits heat to the lap piece, and then the temperature of the lap piece is detected by the temperature sensor to judge whether the welding wire reaches the welding position, further ensuring that the welding wire can be effectively delivered to the welding position during welding of the door ring to avoid empty welding.

[0023] Preferably, a rotating sleeve is rotatably installed at the end of the lap piece away from the torsion spring, the rotating sleeve is "U"-shaped, the rotating sleeve is made of elastic metal, and the "U"-shaped rotating sleeve is sleeved on the surface of the welding wire when the lap piece is lapped on the welding wire.

[0024] The "U"-shaped rotating sleeve is sleeved on the surface of the welding wire, which helps to increase the contact area between the lap piece and the surface of the welding wire, facilitates the transmission of heat on the surface of the welding wire to the lap piece, and further improves the detection sensitivity of the temperature sensor to the temperature of the welding wire.

[0025] Preferably, the rotating sleeve is fixedly provided with a guide piece, the guide piece is located at one end of the rotating sleeve facing the input end, and the guide piece is arc-shaped and raised towards the direction of the lap piece.

[0026] The arc-shaped and raised guide piece can cover the position where the rotating sleeve is connected with the lap piece, so that the welding wire cannot be stuck at the position where the rotating sleeve is connected with the lap piece when entering the wire feeding cylinder, and the stability of the device during use is ensured.

[0027] Preferably, the guide piece is made of elastic metal material, a conductive piece is fixedly arranged at the free end of the guide piece, the conductive piece is made of metal material, the temperature sensor is arranged on the lap piece between the conductive piece and the lap piece, and the surface of the conductive piece and the temperature sensor is in sliding fit.

[0028] The conductive piece and the temperature sensor are in fit, so that the temperature of the welding wire can be more quickly conducted to the temperature sensor, and the detection sensitivity of the temperature sensor is further improved. The guide piece made of elastic metal material can avoid interference with the temperature sensor or the lap piece even when the rotating sleeve rotates, and the stability of the device during operation is ensured.

[0029] Compared with the prior art, the present application has the following advantages: 1. The door ring welding wire penetration state detection device is provided with a detection piece and a lap piece, a weak current is passed through the lap piece to the welding wire, a first current loop is formed when the lap piece and the detection piece are both in contact with the welding wire, whether the current flows through the detection piece is judged by a first shunt on the detection piece, and an electrical signal is fed back to a processing unit to judge whether the welding wire is stretched to the set position and in contact with the detection piece, so as to form an intelligent sensing system, ensure that the welding wire can be stretched to a sufficient length before welding, and ensure that the device will not appear empty welding when used.

[0030] 2. The door ring welding wire penetration state detection device is further provided with a metal ring in the wire feeding cylinder, the welding wire passes through the metal ring during conveying, a second current loop is formed when the metal ring and the lap piece are both in contact with the welding wire, whether the current flows through the metal ring is detected by a second shunt, so as to judge whether the conveying position of the welding wire is skewed, and ensure that the welding wire can be smoothly conveyed to the welding position, and further avoid the occurrence of empty welding.

[0031] 3. The door ring welding wire penetration state detection device is further provided with a temperature sensor on the lap piece, the lap piece is lapped on the welding wire during welding, the welding wire transmits heat to the lap piece, and the temperature of the lap piece is detected by the temperature sensor to judge whether the welding wire reaches the welding position, so as to further ensure that the welding wire can be effectively conveyed to the welding position during the welding process of the door ring, and avoid the occurrence of empty welding. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view of the structure of the present application; Figure 2 is a perspective view of the internal structure of the present application; Figure 3 is a left view of the present application; Figure 4 is a perspective view of the present application Figure 3 is a sectional view at A-A of the present application; Figure 5 is an enlarged view at B of the present application; Figure 4 Figure 6 is an enlarged view at C of the present application; Figure 4 Figure 7 is an enlarged view at D of the present application; Figure 4 Figure 8 is a perspective view of the structure of the overlap piece and rotating sleeve in the present application.

[0033] In the figure: 1, wire feeding cylinder; 101, input end; 102, output end; 2, ring proximity switch; 3, detection piece; 301, detection end; 4, driving assembly; 5, overlap piece; 6, torsion spring; 7, power supply; 8, first shunt; 9, processing unit; 10, sliding sleeve; 11, first guide groove; 12, second guide groove; 13, metal ring; 14, connecting rod; 15, second shunt; 16, buzzer; 17, temperature sensor; 18, rotating sleeve; 19, guide piece; 20, conducting piece; 21, welding wire; a, oblique included angle. DETAILED DESCRIPTION

[0034] Please refer to Figures 1 to 8 , the present application provides a door ring welding wire penetration state detection device, the technical scheme is as follows: A door ring welding wire 21 penetration state detection device, referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 ​​​, including a wire feeding drum 1 for conveying the welding wire 21, the wire feeding drum 1 is circular, the wire feeding drum 1 includes an input end 101 and an output end 102, the input end 101 of the wire feeding drum 1 is internally fixedly installed with a ring-shaped proximity switch 2, the detection ring of the ring-shaped proximity switch 2 is coaxially arranged with the wire feeding drum 1, and the welding wire 21 is uniformly input from the input end 101 of the wire feeding drum 1 into the wire feeding drum 1 by an external wire feeding assembly. The welding wire 21 coaxially passes through the detection ring of the ring-shaped proximity switch 2 from the input end 101 and extends into the wire feeding drum 1, and a detection sheet 3 is slidingly arranged on the outer wall of the output end 102 of the wire feeding drum 1, the detection sheet 3 is a flexible metal sheet, and the thickness of the detection sheet 3 is selected to be 0.5mm in the embodiment. A sliding sleeve 10 is arranged outside the wire feeding drum 1, the sliding sleeve 10 is made of plastic material, one end of the sliding sleeve 10 extends out of the output end 102 and forms an inclined angle a with the axis of the wire feeding drum 1, and the inclined angle a is set to be 30° in the embodiment. The other end of the sliding sleeve 10 is parallel to the axis of the wire feeding drum 1 and is fixed to the outer wall of the wire feeding drum 1, the two ends of the sliding sleeve 10 are smoothly connected, a first guide groove 11 is arranged in the end of the sliding sleeve 10 extending out of the output end 102, the first guide groove 11 is parallel to the end of the sliding sleeve 10 extending out of the output end 102, a second guide groove 12 is arranged in the end of the sliding sleeve 10 fixed to the outside of the wire feeding drum 1, the second guide groove 12 is parallel to the axis of the wire feeding drum 1, the first guide groove 11 and the second guide groove 12 are in communication with each other and are smoothly connected, and the detection sheet 3 is slidingly installed in the first guide groove 11 and the second guide groove 12 and is insulatedly connected with the wire feeding drum 1. One end of the detection sheet 3 facing the output end 102 is a detection end 301.

[0035] Reference Figure 1 and Figure 2 A driving assembly 4 is arranged on the wire feeding drum 1, the driving assembly 4 is an electric push rod, the electric push rod is fixed to the outside of the wire feeding drum 1 and is parallel to the axis of the wire feeding drum 1, and one end of the detection sheet 3 opposite to the detection end 301 is fixedly connected to the push rod output head of the electric push rod.

[0036] Reference Figure 1 and Figure 4 A lap piece 5 is rotatably installed in the wire feeding drum 1, the lap piece 5 is a metal sheet, a torsional spring 6 is arranged at the hinged position of the lap piece 5 and the wire feeding drum 1, and the torsional spring 6 is used to keep the lap piece 5 lapped on the welding wire 21. A power supply 7 is further arranged outside the wire feeding drum 1, the power supply 7 adopts a direct current power supply 7, the output voltage of the power supply 7 is 5V, and the output current is 0.5A, so that even if the person is mistakenly touched, electric shock accident will not occur. The detection sheet 3 is connected with the negative electrode of the power supply 7, the lap piece 5 is connected with the positive electrode of the power supply 7, a first shunt 8 for detecting the current signal of the detection sheet 3 is arranged on the detection sheet 3, a processing unit 9 is further arranged outside the wire feeding drum 1, the processing unit 9 can be a single-chip microcomputer system or a computer processor, and the first shunt 8, the driving assembly 4, the ring-shaped proximity switch 2 and the power supply 7 are electrically connected with the processing unit 9.

[0037] Referring to Figure 4 , Figure 7 and Figure 8 , the lap piece 5 is rotatably mounted with a rotating sleeve 18 at one end away from the torsion spring 6. The rotating sleeve 18 is in a "U" shape and is made of elastic metal. The rotating sleeve 18 is fixedly mounted with a guide piece 19 made of elastic metal material. The guide piece 19 is located at one end of the rotating sleeve 18 facing the input end 101 and is arc-shaped and raised towards the lap piece 5. The free end of the guide piece 19 is fixedly mounted with a conducting piece 20 made of metal material. The lap piece 5 is fixedly mounted with a temperature sensor 17 which is a patch type temperature sensor 17. The temperature sensor 17 is used to detect the temperature of the lap piece 5 and is electrically connected to the processing unit 9. The temperature sensor 17 is arranged on the lap piece 5 between the conducting piece 20 and the lap piece 5, and the surface of the conducting piece 20 and the temperature sensor 17 are slidingly attached.

[0038] Referring to Figure 1 , Figure 2 and Figure 4 , the inside of the wire feeding cylinder 1 is further provided with a metal ring 13 which is electrically connected to the negative electrode of the power supply 7. The metal ring 13 is coaxially fixed inside the wire feeding cylinder 1 by a connecting rod 14 made of insulating material. The welding wire 21 passes through the inner ring of the metal ring 13. The distance between the inner ring side wall of the metal ring 13 and the outer wall of the welding wire 21 is 3mm-5mm. The connecting rod 14 is fixedly mounted with a second shunt 15 for detecting the current signal on the metal ring 13. The second shunt 15 is electrically connected to the processing unit 9. The outside of the wire feeding cylinder 1 is provided with a buzzer 16 which is electrically connected to the processing unit 9.

[0039] In use, referring to Figure 2 , Figure 4 , Figure 5 and Figure 6 , the annular proximity switch 2 judges whether the welding wire 21 is fed into the wire feeding cylinder 1. The lap piece 5 is always lapped on the welding wire 21 under the action of the torsion spring 6, and at the same time, the rotating sleeve 18 on the lap piece 5 is sleeved on the surface of the welding wire 21. The welding wire 21 is made of metal material and has electrical conductivity. At this time, the push rod output head of the electric push rod as the driving assembly 4 is controlled by the processing unit 9 to move at a speed of 0.5cm / s towards the output end 102 of the wire feeding cylinder 1. The electric push rod pushes the detection piece 3 to move horizontally towards the output end 102 of the wire feeding cylinder 1. Under the guidance of the first guide groove 11 and the second guide groove 12, the output end 102 of the detection piece 3 is guided to move in a direction at an angle of 30° with the axis of the wire feeding cylinder 1 towards the axis of the wire feeding cylinder 1 until the detection end 301 of the detection piece 3 coincides with the axis of the wire feeding cylinder 1. Then the electric push rod stops moving.

[0040] Referring toFigure 4 When the external wire feeding assembly drives the welding wire 21 to extend from the output end 102 of the wire feeding drum 1 and touch the detection end 301 of the detection sheet 3, the power supply 7, the overlap sheet 5, the welding wire 21, and the detection sheet 3 form a closed first current loop, and the first shunt 8 on the detection sheet 3 can detect the current. After the first shunt 8 detects the current, the first shunt 8 feeds back an electrical signal to the processing unit 9, determines that the welding wire 21 has extended from the output end 102 of the wire feeding drum 1 by a specified length, and completes the preparation of the welding wire 21 before welding. The processing unit 9 can feed back the electrical signal to the external wire feeding assembly to stop the wire feeding assembly from continuing to feed the welding wire 21.

[0041] Before welding, referring to Figure 4 The welding equipment drives the wire feeding drum 1 and the laser head to move together, aligns one end of the welding wire 21 extending from the output end 102 to the welding position, and aligns the laser head to the welding position. After that, the processing unit 9 controls the push rod output head of the electric push rod to retract at a speed of 3 cm / s, and the electric push rod also drives the detection end 301 of the detection sheet 3 to move away from the axis of the wire feeding drum 1 to return to the original position, preventing the detection sheet 3 from being melted by the laser during welding, and breaking the first current loop. When the electric push rod returns to the original position and stops, the processing unit 9 sends a signal to the external wire feeding assembly, the wire feeding assembly continues to feed the welding wire 21 into the wire feeding drum 1 at a constant speed, the laser head starts to emit a high-energy laser beam to melt the welding wire 21 at the welding position, and the welding equipment drives the wire feeding drum 1 and the laser head to move along the trajectory of the weld, thereby realizing the welding operation of the door ring.

[0042] During welding, referring to Figure 1 , Figure 3 , Figure 4 The metal ring 13 also detects the state of the welding wire 21 at all times, and once the welding wire 21 contacts the metal ring 13, the metal ring 13, the welding wire 21, and the overlap sheet 5 form a closed second current loop. After the second shunt 15 detects the current, the second shunt 15 transmits an electrical signal to the processing unit 9, and the processing unit 9 analyzes and processes. When the second shunt 15 continuously detects the current for 2 seconds, the processing unit 9 controls the buzzer 16 to sound an alarm and sends a signal to the external wire feeding assembly to stop feeding the welding wire 21 into the wire feeding drum 1. At the same time, the processing unit 9 also feeds back an electrical signal to the welding equipment to control the laser head to stop emitting a high-energy laser beam. After the worker hears the buzzer 16 sounding, the worker checks the equipment to avoid the situation that the welding wire 21 is distorted and cannot be accurately fed to the welding position, causing a large range of empty welding, and ensures the stability of the welding quality during the production of the door ring.

[0043] In addition, referring to Figure 4 , Figure 7 and Figure 8In the welding process of the door ring, the temperature sensor 17 on the lap piece 5 always detects the temperature of the lap piece 5. In the welding process, the laser head emits a high-energy laser beam to melt the welding wire 21, and the welding wire 21 will transmit the temperature along the welding wire 21. The lap piece 5 is sleeved on the surface of the welding wire 21 through the rotating sleeve 18, so the temperature of the welding wire 21 will be transmitted to the lap piece 5. At the same time, through the "U" shape design of the rotating sleeve 18 and the cooperation of the conductive piece 20 and the lap piece 5, the temperature on the welding wire 21 can be transmitted to the temperature sensor 17 more quickly, and the detection sensitivity of the temperature sensor 17 is improved.

[0044] Reference Figure 4 The lap piece 5 is located inside the wire feeding cylinder 1 and is close to the welding position, so the temperature rises faster and is more easily distinguished from the environment temperature. The temperature sensor 17 feeds back the detected data to the processing unit 9. In the welding process, that is, in the process of starting the laser head, if the temperature detected by the temperature sensor 17 is lower than the set temperature for a certain time, it can be judged that the welding wire 21 cannot be effectively transmitted to the welding position to be melted by the laser. In this embodiment, the detected temperature of the temperature sensor 17 can be set to 50℃. If the temperature sensor 17 detects that the temperature of the lap piece 5 is lower than 50℃ for more than 5 seconds in the process of starting the laser head, the processing unit 9 judges that the welding wire 21 cannot be effectively transmitted to the welding position. Then the processing unit 9 feeds back a signal to the welding equipment to stop the work of the laser head, and controls the buzzer 16 to issue an alarm to remind the worker to repair, so as to avoid the welding equipment always being empty.

[0045] The above describes one specific embodiment of the present application in detail in combination with the drawings, but the present application is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and ideas of the present application, which should still fall within the protection scope of the present application.

Claims

1. A kind of door ring welding wire penetration state detection device, including the wire feeding cylinder (1) for conveying welding wire (21), the wire feeding cylinder (1) is circular, the wire feeding cylinder (1) includes input end (101) and output end (102), the input end (101) of the wire feeding cylinder (1) is fixedly installed with annular proximity switch (2) inside, the welding wire (21) is coaxially extended into wire feeding cylinder (1) from input end (101) and passes through the detection ring of annular proximity switch (2), it is characterized in that, The outer wall of the wire feeding cylinder (1) is slidably provided with a detection sheet (3), the detection sheet (3) is insulatedly connected with the wire feeding cylinder (1), one end of the detection sheet (3) towards the output end (102) is a detection end (301), an inclined angle (a) is formed between the detection sheet (3) and the axis of the wire feeding cylinder (1), the wire feeding cylinder (1) is provided with a driving assembly (4), the wire feeding cylinder (1) is rotatably installed with a lap joint sheet (5) inside, the lap joint sheet (5) is provided with a torsional spring (6) at the position hinged with the wire feeding cylinder (1), the wire feeding cylinder (1) is further provided with a power supply (7) outside, the detection sheet (3) is conductively connected with the negative electrode of the power supply (7), the lap joint sheet (5) is conductively connected with the positive electrode of the power supply (7), the detection sheet (3) is provided with a first shunt (8), the wire feeding cylinder (1) is further provided with a processing unit (9) outside, the first shunt (8), the driving assembly (4), the ring-shaped proximity switch (2) and the power supply (7) are all electrically connected with the processing unit (9).

2. A door loop wire penetration status detection device according to claim 1, characterized in that, The detection sheet (3) is an elastic metal sheet, the wire feeding cylinder (1) is provided with a sliding sleeve (10) outside, the sliding sleeve (10) is made of plastic material, one end of the sliding sleeve (10) extends out of the output end (102) and forms an inclined angle (a) with the axis of the wire feeding cylinder (1), the other end of the sliding sleeve (10) is parallel to the axis of the wire feeding cylinder (1) and is fixed on the outer wall of the wire feeding cylinder (1), one end of the sliding sleeve (10) extending out of the output end (102) is provided with a first guide groove (11), the first guide groove (11) is parallel to one end of the sliding sleeve (10) extending out of the output end (102), one end of the sliding sleeve (10) fixed on the outside of the wire feeding cylinder (1) is provided with a second guide groove (12), the second guide groove (12) is parallel to the axis of the wire feeding cylinder (1), the first guide groove (11) and the second guide groove (12) are in communication and transitionally connected, the detection sheet (3) is slidably installed in the first guide groove (11) and the second guide groove (12).

3. A door loop wire penetration status detection device according to claim 2, wherein, The driving assembly (4) is an electric push rod, the electric push rod is fixed on the outside of the wire feeding cylinder (1) and is parallel to the axis of the wire feeding cylinder (1), one end of the detection sheet (3) opposite to the detection end (301) is fixedly connected to the push rod output head of the electric push rod.

4. The door loop wire penetration status detection device of claim 1, wherein, The metal ring (13) is coaxially fixed in the inside of the wire feeding cylinder (1) through the connecting rod (14), the connecting rod (14) is made of insulating material, the welding wire (21) passes through the inner ring of the metal ring (13), the distance between the inner ring sidewall of the metal ring (13) and the outer wall of the welding wire (21) is 3mm-5mm, the second shunt (15) for detecting the current signal on the metal ring (13) is fixedly installed on the connecting rod (14), the second shunt (15) is electrically connected with the processing unit (9), the wire feeding cylinder (1) is externally provided with a buzzer (16), and the buzzer (16) is electrically connected with the processing unit (9).

5. The door loop wire penetration status detection device of claim 1, wherein, The temperature sensor (17) is a patch type temperature sensor (17), which is used for detecting the temperature of the lap piece (5), and is electrically connected with the processing unit (9).

6. A door loop wire penetration status detection device according to claim 5, wherein The lap piece (5) is rotatably installed with a rotating sleeve (18) away from one end of the torsional spring (6), the rotating sleeve (18) is "U"-shaped, the rotating sleeve (18) is made of elastic metal, and when the lap piece (5) is lapped on the welding wire (21), the "U"-shaped rotating sleeve (18) is sleeved on the surface of the welding wire (21).

7. A door loop wire penetration status detection device according to claim 6, wherein The rotating sleeve (18) is fixedly installed with a guide piece (19), the guide piece (19) is located at one end of the rotating sleeve (18) facing the input end (101), and the guide piece (19) is arc-shaped and raised towards the lap piece (5).

8. A door loop wire penetration status detection device according to claim 7, wherein The guide piece (19) is made of elastic metal material, the free end of the guide piece (19) is fixedly installed with a conductive piece (20), the conductive piece (20) is made of metal material, the temperature sensor (17) is arranged on the lap piece (5) between the conductive piece (20) and the lap piece (5), and the conductive piece (20) is in sliding fit with the surface of the temperature sensor (17).

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