A gate loop wire penetration state detection device

Abstract

The application 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 arranged in the wire feeding cylinder, a detection sheet is slidably arranged on the wire feeding cylinder, 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 sheet is rotatably arranged in the wire feeding cylinder, a torsional spring is arranged on the lap sheet, a power supply is further arranged outside the wire feeding cylinder, the detection sheet is connected with the negative electrode of the power supply, the lap sheet is connected with the positive electrode of the power supply, a first shunt 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. The intelligent sensing system composed of the detection sheet, the lap sheet, the power supply, the first shunt and the processing unit can ensure that the welding wire can be stretched to a sufficient length before welding, and can ensure that the problem of empty welding does not occur when the 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.

[0009] 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 insulatively 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 sheet is rotatably installed inside the wire feeding cylinder, the lap sheet is a metal sheet, a torsional spring is arranged at the position where the lap sheet is hinged with the wire feeding cylinder, the torsional spring is used for keeping the lap sheet lapped on the welding wire, a power supply is further arranged outside the wire feeding cylinder for providing current for the lap sheet, 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, the first shunt, the driving assembly, the annular proximity switch and the power supply are electrically connected with the processing unit.

[0010] The welding wire is input from the input end of the wire feeding cylinder to the inside of the wire feeding cylinder by the external wire feeding assembly, 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 sheet can rotate to avoid the extrusion of the welding wire.

[0011] The end of the detection sheet away from the detection end is connected with the negative electrode of the power supply, and the lap sheet 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 by 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 during welding.

[0012] The scheme is composed of a power supply, a processing unit, a driving assembly, a detection sheet and a lap sheet to form an intelligent sensing system, which can help to automatically detect the extension length of the welding wire, and then cooperate with the laser welding equipment to form an intelligent welding system, 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 situation of empty welding, thereby ensuring the stable quality of the welded door ring product.

[0013] Preferably, the detection sheet is an elastic metal sheet, the wire feeding cylinder is externally provided with a sliding sleeve made of plastic material, one end of the sliding sleeve extends out of an 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 internally provided with a first guide groove parallel to the output end of the sliding sleeve, and the other end of the sliding sleeve externally provided with a second guide groove is parallel to the axis of the wire feeding cylinder, the first guide groove and the second guide groove are in communication and smoothly connected, and the detection sheet is slidably installed in the first guide groove and the second guide groove.

[0014] 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, which not only ensures that the detection sheet can be inclined to extend to the specified 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 parts of the welding equipment or other workpieces during welding.

[0015] The plastic is used as the material of the sliding sleeve, which has low processing and material costs, and in addition, the self-lubricating effect of the plastic can be used to reduce the resistance when the detection sheet slides.

[0016] Preferably, the driving assembly is an electric push rod, which is parallel to the axis of the wire feeding cylinder and is fixed to the outside 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, which can avoid the collision between the detection sheet and the welding wire caused by the rapid extension of the detection sheet, avoid the situation that the welding wire cannot be correctly extended to the welding position caused by the collision of the detection sheet during the extension of the detection sheet, and ensure the stability of the equipment during use. In addition, the retraction speed of the electric push rod can be controlled when the detection sheet is retracted, so that the detection sheet can be quickly retracted to avoid damage to the detection sheet by the laser.

[0017] Preferably, the wire feeding cylinder is internally provided with a metal ring, the metal ring is in conductive connection with the negative electrode of the power supply, the metal ring is coaxially fixed in 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 ring side wall of the metal ring and the outer wall of the welding wire is 3-5 mm, 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 with the processing unit.

[0018] The welding wire passes through the center of the metal ring and does not contact the metal ring in the normal state. When the welding wire is fed too fast in the welding process, the welding wire cannot be melted under the laser beam, 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 contact the metal ring, and the subsequent welding wire cannot be stably fed to the welding position due to the skew, at this time, the metal ring, the welding wire and the lap piece form a second current loop, the shunt detects the current and transmits the electric signal to the processing unit, the processing unit controls the buzzer to sound and issue an alarm, so that the worker can check the welding equipment, and the empty welding caused by the skew of the welding wire is avoided.

[0019] In addition, when the welding wire collides with foreign matters and is skewed and contacts the metal ring in the welding process, a second current loop is also formed, and an alarm is issued to ensure the welding quality of the door ring product.

[0020] The distance between the inner ring side wall of the metal ring and the outer wall of the welding wire is set to 3-5 mm, which leaves a certain margin to avoid the false touch caused by the jumping of the welding wire itself in the feeding process, and can ensure that the skew of the welding wire can be found in time.

[0021] The metal ring is used to judge the state of the welding wire in the welding process, ensures that the welding wire does not collide with foreign matters to cause skew in the welding process, ensures that the welding wire can be stably fed to the welding position, and avoids empty welding.

[0022] Preferably, the lap piece is fixedly provided with a temperature sensor, 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.

[0023] 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, which further ensures that the welding wire can be effectively fed to the welding position in the welding process of the door ring, and avoids the occurrence of empty welding.

[0024] Preferably, a rotating sleeve is rotatably installed at one end of the torsion spring away from the torsion spring, the rotating sleeve is in a U shape, the rotating sleeve is made of elastic metal, and when the clamping piece clamps the welding wire, the U-shaped rotating sleeve is sleeved on the surface of the welding wire.

[0025] The U-shaped rotating sleeve sleeved on the surface of the welding wire helps to increase the contact area between the clamping piece and the surface of the welding wire, facilitates the heat transfer from the surface of the welding wire to the clamping piece, and further improves the detection sensitivity of the temperature sensor to the temperature of the welding wire.

[0026] Preferably, a guide piece is fixedly installed on the rotating sleeve, 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 clamping piece.

[0027] The arc-shaped guide piece can cover the position where the rotating sleeve is rotatably connected to the clamping piece, so as to avoid the welding wire being stuck at the position where the clamping piece is rotatably connected to the rotating sleeve when the welding wire enters the wire feeding cylinder, and to ensure the stability of the equipment during use.

[0028] Preferably, the guide piece is made of elastic metal material, a conductive piece is fixedly installed at the free end of the guide piece, the conductive piece is made of metal material, the temperature sensor is arranged on the clamping piece between the conductive piece and the clamping piece, and the surface of the conductive piece and the temperature sensor is in sliding fit.

[0029] 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 clamping piece even when the rotating sleeve rotates, and ensures the stability of the equipment during operation.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] 1. The door ring welding wire penetration state detection device designed in the present application forms an intelligent sensing system by setting a detection piece and a clamping piece, passing a weak current through the clamping piece, forming a first current loop when the clamping piece and the detection piece are in contact with the welding wire, judging whether the detection piece has current flowing through the first shunt on the detection piece, and feeding the electric signal to the processing unit to judge whether the welding wire is in contact with the detection piece at the set position, so as to ensure that the welding wire can extend to a sufficient length before welding, and to ensure that the equipment will not have the problem of empty welding when it is started.

[0032] 2、The door ring welding wire penetration state detection device designed by the application is also provided with a metal ring in the wire feeding cylinder, so that the welding wire passes through the metal ring in the conveying process, a second current loop is formed when the metal ring and the lap plate are in contact with the welding wire, and whether the current flows through the metal ring is detected by using the 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 sent to the welding position, and further avoid the occurrence of the air welding condition.

[0033] 3、The door ring welding wire penetration state detection device designed by the application is also provided with a temperature sensor on the lap piece, the lap piece is lapped on the welding wire during welding, the welding wire will transmit 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 ensure that the welding wire can be effectively sent to the welding position during the welding process of the door ring, and avoid the occurrence of the air welding condition. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0035] Figure 2 It is an internal structure three-dimensional view of the application;

[0036] Figure 3 It is a left view of the application;

[0037] Figure 4 It is a sectional view of A-A in the application; Figure 3

[0038] Figure 5 It is an enlarged view of B in the application; Figure 4

[0039] Figure 6 It is an enlarged view of C in the application; Figure 4

[0040] Figure 7 It is an enlarged view of D in the application; Figure 4

[0041] Figure 8 It is a three-dimensional structure schematic diagram of the lap piece and the rotating sleeve in the application.

[0042] ​​​​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, lap piece; 6, torsional 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, conduction piece; 21, welding wire; a, inclined angle. DETAILED DESCRIPTION

[0043] Please refer to Figures 1 to 8 , the present application provides a door ring welding wire penetration state detection device, technical scheme as follows:

[0044] A door ring welding wire 21 penetration state detection device, referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 , 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 ring proximity switch 2 inside, the detection ring of the ring proximity switch 2 is coaxially arranged with the wire feeding cylinder 1, and the welding wire 21 is uniformly input from the input end 101 of the wire feeding cylinder 1 to the inside of the wire feeding cylinder 1 by the external wire feeding assembly. The welding wire 21 coaxially passes through the detection ring of the ring proximity switch 2 from the input end 101 and extends into the wire feeding cylinder 1, and the detection piece 3 is slidingly arranged on the outer wall of the output end 102 of the wire feeding cylinder 1, the detection piece 3 is a flexible metal sheet, and the thickness of the detection piece 3 is selected to be 0.5 mm in the embodiment. 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, and the inclined angle a is set to 30° in the embodiment. The other end of the sliding sleeve 10 is parallel to the axis of the wire feeding cylinder 1 and is fixed to the outer wall of the wire feeding cylinder 1, the two ends of the sliding sleeve 10 are smoothly and transitionally connected, the 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, the second guide groove 12 is arranged in the end of the sliding sleeve 10 fixed to the outside of the wire feeding cylinder 1, 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 with each other and are smoothly and transitionally connected, and the detection piece 3 is slidingly installed in the first guide groove 11 and the second guide groove 12 and is insulatedly connected with the wire feeding cylinder 1. The end of the detection piece 3 towards the output end 102 is the detection end 301.

[0045] Referring to Figure 1 and Figure 2The driving assembly 4 is an electric push rod, which is fixed to the outside of the wire feeding cylinder 1 in parallel with the axis of the wire feeding cylinder 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.

[0046] With reference to Figure 1 and Figure 4 The overlap sheet 5 is rotatably installed in the inside of the wire feeding cylinder 1, the overlap sheet 5 is a metal sheet, a torsion spring 6 is arranged at the hinged position of the overlap sheet 5 and the wire feeding cylinder 1, the torsion spring 6 is used to keep the overlap sheet 5 overlapped on the welding wire 21, and a power supply 7 is further arranged on the outside of the wire feeding cylinder 1, the power supply 7 is a direct current power supply 7, the output voltage of the power supply 7 is 5V, and the output current is 0.5A, so as to ensure that even if the artificial mis-touch occurs, the electric shock accident will not happen. The detection sheet 3 is connected with the negative pole of the power supply 7, the overlap sheet 5 is connected with the positive pole 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 on the outside of the wire feeding cylinder 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.

[0047] With reference to Figure 4 , Figure 7 and Figure 8 A rotating sleeve 18 is rotatably installed at the end of the overlap sheet 5 away from the torsion spring 6, the rotating sleeve 18 is in a "U" shape and is made of elastic metal. A guide sheet 19 is fixedly installed on the rotating sleeve 18, the guide sheet 19 is made of elastic metal material, the guide sheet 19 is located at the end of the rotating sleeve 18 facing the input end 101, and the guide sheet 19 is arc-shaped and rises towards the overlap sheet 5. A conduction sheet 20 is fixedly installed at the free end of the guide sheet 19, and the conduction sheet 20 is made of metal material. A temperature sensor 17 is fixedly installed on the overlap sheet 5, the temperature sensor 17 is a patch type temperature sensor 17, the temperature sensor 17 is used to detect the temperature of the overlap sheet 5, and the temperature sensor 17 is electrically connected with the processing unit 9. The temperature sensor 17 is arranged on the overlap sheet 5 between the conduction sheet 20 and the overlap sheet 5, and the surface of the conduction sheet 20 and the temperature sensor 17 are slidingly attached.

[0048] With reference to Figure 1 , Figure 2 and Figure 4, the inside of the wire feeding cylinder 1 is further provided with a metal ring 13, the metal ring 13 is conductively connected with the negative electrode of the power supply 7, the metal ring 13 is coaxially fixed in the inside of the wire feeding cylinder 1 through a 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 outside of the wire feeding cylinder 1 is provided with a buzzer 16, the buzzer 16 is electrically connected with the processing unit 9.

[0049] 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 inside of 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, 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 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 and moves towards the axis direction of the wire feeding cylinder 1 at an angle of 30° with 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.

[0050] Referring to Figure 4 , when the welding wire 21 is stretched out from the output end 102 of the wire feeding cylinder 1 and touches the detection end 301 of the detection piece 3 under the drive of the external wire feeding assembly, the power supply 7, the lap piece 5, the welding wire 21 and the detection piece 3 form a closed first current loop, the first shunt 8 on the detection piece 3 can detect the current, the first shunt 8 feeds back the electric signal to the processing unit 9 after detecting the current, it is determined that the welding wire 21 has been stretched out from the output end 102 of the wire feeding cylinder 1 by a specified length, and the preparation of the welding wire 21 before welding is completed. The processing unit 9 can feed back the electric signal to the external wire feeding assembly, so that the wire feeding assembly stops continuing to feed the welding wire 21.

[0051] Before welding, referring to Figure 4, the welding equipment drives the wire feeding cylinder 1 and the laser head to move together, and the end of the welding wire 21 extending out of the output end 102 is aligned to the welding position. After the laser head is also aligned to the welding position, 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 detection end 301 of the detection piece 3 is also moved away from the axis of the wire feeding cylinder 1 to be retracted to the original position, so as to prevent the laser from melting the detection piece 3 during welding, and the first current loop is disconnected. When the electric push rod is reset and stopped, the processing unit 9 sends a signal to the external wire feeding assembly, the wire feeding assembly continues to uniformly feed the welding wire 21 into the wire feeding cylinder 1, 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 cylinder 1 and the laser head to move along the track of the weld, so as to realize the welding operation of the door ring.

[0052] In the welding process, referring to Figure 1 、 Figure 3 、 Figure 4 , the metal ring 13 also detects the state of the welding wire 21 at any time. Once the welding wire 21 contacts the metal ring 13, the metal ring 13, the welding wire 21 and the lap piece 5 form a closed second current loop. When the second shunt 15 detects the current, it transmits an electrical signal to the processing unit 9. The processing unit 9 analyzes and processes the signal. 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 cylinder 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. When the worker hears the buzzer 16 sounding, he 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. This ensures the stability of the welding quality during the production of the door ring.

[0053] In addition, referring to Figure 4 、 Figure 7 and Figure 8 , the temperature sensor 17 on the lap piece 5 detects the temperature of the lap piece 5 at any time during the welding of the door ring. During the welding process, the laser head emits a high-energy laser beam to melt the welding wire 21, and the welding wire 21 transmits 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 is transmitted to the lap piece 5. At the same time, the "U"-shaped design of the rotating sleeve 18 and the close contact of the lap piece 5 with the temperature sensor 17 from both sides of the temperature sensor 17 through the conductive piece 20 enable the temperature on the welding wire 21 to be transmitted to the temperature sensor 17 more quickly, thereby improving the detection sensitivity of the temperature sensor 17.

[0054] Referring to Figure 4The overlap 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 ambient temperature. The temperature sensor 17 feeds back the detected data to the processing unit 9. During the welding process, i.e. during the laser head starting process, if the temperature detected by the temperature sensor 17 is lower than the set temperature for a certain period of time, it can be judged that the welding wire 21 has not been effectively delivered to the welding position to be melted by the laser. In this embodiment, the temperature detected by the temperature sensor 17 can be set to 50°C. If the temperature sensor 17 detects that the temperature of the overlap piece 5 is lower than 50°C for more than 5 seconds during the laser head starting process, the processing unit 9 judges that the welding wire 21 has not been effectively delivered to the welding position. Subsequently, 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 being continuously welded in vain.

[0055] 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, and 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), a lap sheet (5) is rotatably installed inside the wire feeding cylinder (1), a torsional spring (6) is arranged at the position where the lap sheet (5) is hinged with the wire feeding cylinder (1), a power supply (7) is further arranged outside the wire feeding cylinder (1), the detection sheet (3) is conductively connected with the negative electrode of the power supply (7), the lap sheet (5) is conductively connected with the positive electrode of the power supply (7), a first shunt (8) is arranged on the detection sheet (3), a processing unit (9) is further arranged outside the wire feeding cylinder (1), the first shunt (8), the ring-shaped proximity switch (2) and the power supply (7) are all electrically connected with the processing unit (9), a metal ring (13) is arranged inside the wire feeding cylinder (1), the metal ring (13) is conductively connected with the negative electrode of the power supply (7), the metal ring (13) is coaxially fixed inside the wire feeding cylinder (1) through a 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 side wall of the metal ring (13) and the outer wall of the welding wire (21) is 3mm-5mm, a second shunt (15) for detecting the current signal on the metal ring (13) is fixedly installed on the connecting rod (14), a temperature sensor (17) is fixedly installed on the lap sheet (5), the temperature sensor (17) is a patch type temperature sensor (17), the temperature sensor (17) is used for detecting the temperature of the lap sheet (5), the temperature sensor (17) is electrically connected with the processing unit (9), a rotating sleeve (18) is rotatably installed at the end of the lap sheet (5) away from the torsional spring (6), the rotating sleeve (18) is "U"-shaped, the rotating sleeve (18) is made of elastic metal, when the lap sheet (5) is lapped on the welding wire (21), the "U"-shaped rotating sleeve (18) is sleeved on the surface of the welding wire (21), a guide sheet (19) is fixedly installed on the rotating sleeve (18), the guide sheet (19) is located at one end of the rotating sleeve (18) towards the input end (101), the guide sheet (19) is arc-shaped and rises towards the lap sheet (5), the guide sheet (19) is made of elastic metal material, a conducting sheet (20) is fixedly installed at the free end of the guide sheet (19), the conducting sheet (20) is made of metal material, the temperature sensor (17) is located between the conducting sheet (20) and the lap sheet (5), the conducting sheet (20) is slidably attached to the surface of the temperature sensor (17).

2. A door loop wire penetration status detection device according to claim 1, characterized in that, The detection piece (3) is an elastic metal piece, the outer part of the wire feeding cylinder (1) is provided with a sliding sleeve (10), the sliding sleeve (10) is made of plastic material, one end of the sliding sleeve (10) extends to an 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), a first guide groove (11) is arranged in the end of the sliding sleeve (10) extending to the output end (102), the first guide groove (11) is parallel to the end of the sliding sleeve (10) extending to the output end (102), a second guide groove (12) is arranged in the end of the sliding sleeve (10) fixed on the outer part of the wire feeding cylinder (1), 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 communicated and transitionally connected, and the detection piece (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 wire feeding cylinder (1) is provided with a driving assembly (4), the driving assembly (4) is an electric push rod, the driving assembly (4) is electrically connected with the processing unit (9), the electric push rod is fixed on the outer part of the wire feeding cylinder (1) and is parallel to the axis of the wire feeding cylinder (1), and one end of the detection piece (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 second shunt (15) is electrically connected with the processing unit (9), the outer part of the wire feeding cylinder (1) is provided with a buzzer (16), and the buzzer (16) is electrically connected with the processing unit (9).

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