Stainless steel wire duct welding device

Abstract

The utility model discloses a stainless steel wire duct welding device which comprises a fixing frame, supporting supports are vertically connected to the four corners of the fixing frame respectively, a transmission system is arranged on the fixing frame, a welding execution system is arranged on the transmission system, and a welding seam positioning system and a welding gun are arranged on the welding execution system. A control unit is further arranged on the fixing frame, the control unit is electrically connected with the transmission system, and the control unit is further in signal connection with the welding execution system and the welding seam positioning system. The stainless steel wire duct welding device provided by the utility model provides a high-precision and high-stability omnibearing automatic welding device adopting laser positioning, and solves the problems of poor welding quality, low precision and poor stability in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electrified railway automatic device, and relates to a stainless steel wire slot welding device. BACKGROUND

[0002] In the subway construction, the stainless steel wire slot is connected by welding, and the welding process and quality are required to be high, the waterproof grade is not less than IPX7, and the air tightness is required to be high. The traditional welding work is completed by a welder. On the one hand, the welding environment is generally poor, smoke and strong light are generated in the welding process, and the health of the welder is seriously threatened. On the other hand, the welder needs to observe the position of the welding gun and the weld continuously, and the welding posture is kept stable for a long time, so that the welding labor intensity is high, the work efficiency is low, and the welding quality is difficult to guarantee.

[0003] Poor welding quality can cause the wire slot to be damaged, and if the welding quality problem occurs, the safe operation of the power line in the wire slot will be affected. With the increasing requirements of modern manufacturing industry on welding quality and efficiency, the welding process operation has experienced the transition from manual welding to automatic welding. However, the automatic welding device developed at present has poor adaptability to the variety of welding materials, the change of thickness and the change of welding environment, and cannot meet the welding requirements of the subway stainless steel wire slot. And the automatic welding machine on the market is large in size and inconvenient to carry, and cannot complete the work in the narrow space of the subway system. SUMMARY

[0004] The utility model aims at providing a stainless steel wire slot welding device, providing a high-precision and high-stability all-directional automatic welding device adopting laser positioning, and solving the problems of poor welding quality, low precision and poor stability.

[0005] The utility model adopts the technical scheme, a stainless steel wire slot welding device, including the fixed frame, the fixed frame four corners are respectively connected with the support support perpendicularly, the fixed frame is equipped with transmission system, the transmission system is equipped with the welding execution system, the welding execution system is equipped with the weld positioning system and the welding gun, and the fixed frame is equipped with the control unit.

[0006] The control unit is electrically connected with the transmission system, and the control unit is also signal connected with the welding execution system and the weld positioning system.

[0007] The utility model has the characteristics that:

[0008] The transmission system comprises a second stepper motor and a third stepper motor arranged on two sides of the fixed frame respectively, the output shaft of the second stepper motor is connected with a first driving wheel, the fixed frame is provided with a first driven wheel matched with the first driving wheel, the first driving wheel and the first driven wheel are connected through a first conveying belt, the output shaft of the third stepper motor is connected with a second driving wheel, the fixed frame is provided with a second driven wheel matched with the second driving wheel, the second driving wheel and the second driven wheel are connected through a second conveying belt, and the welding execution system is connected on the first conveying belt and the second conveying belt.

[0009] The first driving wheel is connected with the output shaft of the second stepper motor through a shaft coupling, and the second driving wheel is connected with the output shaft of the third stepper motor through a shaft coupling.

[0010] The welding execution system comprises a ring-shaped welding track, the ring-shaped welding track is connected with the first conveying belt and the second conveying belt at two ends respectively, the ring-shaped welding track is provided with a matched rack, the side wall of the rack is provided with a fixed plate, the fixed plate is provided with a first stepper motor and a signal receiving unit respectively, the signal receiving unit is signal-connected with a control unit, the signal receiving unit is also electrically connected with the first stepper motor, the output shaft of the first stepper motor penetrates through the fixed plate and is connected with a gear, the gear is meshed with the rack, and a welding gun is arranged on the fixed plate.

[0011] The fixed plate is provided with a buckle, and the welding gun is detachably arranged in the buckle.

[0012] The welding positioning system comprises a laser module, the laser module is arranged on the fixed plate, the laser module comprises a weld seam tracking sensor and a contact type displacement potential sensor, and the weld seam tracking sensor and the contact type displacement potential sensor are electrically connected with the control unit.

[0013] The control unit comprises a switching power supply, the switching power supply is electrically connected with an STM32 single-chip microcomputer, the STM32 single-chip microcomputer is connected with two stepper motor drivers through a level conversion chip, and the two stepper motor drivers are connected with the second stepper motor and the third stepper motor respectively.

[0014] Each supporting bracket is connected with a universal wheel at the lower end.

[0015] The beneficial effects of the utility model are as follows:

[0016] (1) The stainless steel wire slot welding device provided by the utility model is a high-precision, high-stability and omnibearing automatic welding device adopting laser positioning, can improve welding quality, production efficiency and ensure welding precision, and can also ensure welding uniformity, welding quality consistency and stability.

[0017] (2) The utility model discloses a stainless steel wire slot welding device is a small volume, low power consumption, good stability's semi -automatic welding device, and the device can realize continuous welding, reduces the time of manual operation, reduces the manual labor intensity to improve production efficiency, solves the welding quality and production efficiency mainly depend on the technology and experience of welder when adopting manual welding before, and the problem that the influence of human factor and environmental factor is bigger, thereby guaranteeing the uniformity of welding and the consistency and stability of welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model stainless steel wire slot welding device;

[0019] Figure 2 It is the front structure schematic diagram of the utility model stainless steel wire slot welding device;

[0020] Figure 3 It is the overhead structure schematic diagram of the utility model stainless steel wire slot welding device;

[0021] Figure 4 It is the structure schematic diagram of the welding torch and laser module part in the utility model stainless steel wire slot welding device;

[0022] Figure 5 It is the control system scheme design schematic diagram of the utility model stainless steel wire slot welding device;

[0023] Figure 6 It is the pin diagram of main chip and motor control circuit in the utility model stainless steel wire slot welding device.

[0024] In the drawing, 1. First stepper motor, 2. Welding torch, 3. Annular welding track, 4. Second stepper motor, 5. Third stepper motor, 6. First conveyor belt, 7. Second conveyor belt, 8. Support bracket, 9. Universal wheel, 10. Control unit, 11. Signal receiving unit, 12. Laser module. DETAILED DESCRIPTION

[0025] The utility model will be explained in detail below in combination with the drawings and specific embodiment.

[0026] The stainless steel wire slot welding device, as shown in Figure 1 、 2 It is shown that the fixed frame is vertically connected with support bracket 8 at four corners, and the lower end of each support bracket 8 is connected with universal wheel 9, which is convenient to move, and the fixed frame is provided with transmission system, and the transmission system is provided with welding execution system, and the welding execution system is provided with weld positioning system and welding torch 2.

[0027] The fixed frame is further provided with a control unit 10, which is electrically connected with the transmission system, and is signal connected with the welding execution system and the weld positioning system respectively.

[0028] Specifically, as shown in the figure, Figure 3 The transmission system comprises a second stepper motor 4 and a third stepper motor 5 arranged on the two sides of the fixed frame respectively, the output shaft of the second stepper motor 4 is connected with a first driving wheel through a shaft coupling, the fixed frame is provided with a first driven wheel matched with the first driving wheel, the first driving wheel and the first driven wheel are connected through a first transmission belt 6, the output shaft of the third stepper motor 5 is connected with a second driving wheel through a shaft coupling, the fixed frame is provided with a second driven wheel matched with the second driving wheel, the second driving wheel and the second driven wheel are connected through a second transmission belt 7, and the welding execution system is connected on the first transmission belt 6 and the second transmission belt 7.

[0029] In operation, the control unit 10 controls the second stepper motor 4 and the third stepper motor 5 to work synchronously, drives the first driving wheel and the second driving wheel to rotate respectively, and drives the first transmission belt 6 and the second transmission belt 7 to rotate, so as to drive the welding execution system to rotate, which can help the welding gun 2 to be positioned and aligned with the weld.

[0030] As shown in the figure, Figure 4 The welding execution system comprises a ring-shaped welding track 3, the ring-shaped welding track 3 is connected with the first transmission belt 6 and the second transmission belt 7 at two ends respectively, the ring-shaped welding track 3 is provided with a matched rack, the side wall of the rack is provided with a fixed plate, the first stepper motor 1 and a signal receiving unit 11 are mounted on the fixed plate respectively, the signal receiving unit 11 is signal connected with the control unit 10, and the signal receiving unit 11 is further electrically connected with the first stepper motor 1, the output shaft of the first stepper motor 1 penetrates through the fixed plate and is connected with a gear, the gear is arranged in meshing with the rack, and the welding gun 2 is arranged on the fixed plate, specifically, the fixed plate is provided with a buckle, the welding gun 2 is detachably arranged in the buckle, and the welding gun 2 can be fixed in the buckle through screwing, clamping and other ways, the position and angle of the welding gun 2 can be adjusted according to the welding requirements, including the height, angle and distance between the welding gun 2 and the workpiece, so as to ensure the welding quality, and the above connection mode belongs to the known technology, and the specific structure will not be described here.

[0031] In operation, the first stepper motor 1 is started to drive the gear to rotate, so as to control the welding gun 2 to move along the ring-shaped welding track 3.

[0032] As shown in the figure, Figure 5As shown, the welding positioning system comprises a laser module 12 arranged on a fixed plate, wherein the laser module 12 comprises a weld tracking sensor and a contact displacement potential sensor, the weld tracking sensor is used to detect the displacement of the welding gun and the weld center horizontal line in real time, and the contact displacement potential sensor is used to detect the displacement of the welding gun and the weld center height in real time, and the weld tracking sensor and the contact displacement potential sensor are electrically connected with the control unit 10.

[0033] Before welding, the laser module 12 can be used to assist in positioning the weld and checking whether the welding gap is appropriate. During the welding process, in order to ensure that the laser beam is always aligned with the weld, a weld tracking technology needs to be used. The basic principle of laser weld tracking is based on laser triangulation method: the laser module emits laser irradiation to the workpiece surface, and then the laser profile is imaged on the CCD or CMOS sensor after diffuse reflection. The controller processes and analyzes the collected images to obtain the position of the weld for guiding welding or correcting the welding track.

[0034] The welding positioning system of the device manually controls the start and stop of the motor to realize semi-automatic positioning of the weld.

[0035] As shown in Figure 6 The control unit 10 comprises a switching power supply, the switching power supply is electrically connected with an STM32 single-chip microcomputer, the STM32 single-chip microcomputer is connected with two stepper motor drivers through a level conversion chip, and the two stepper motor drivers are connected with the second stepper motor 4 and the third stepper motor 5 respectively. The control unit 10 sends signals to the signal receiving unit 11, the signal receiving unit 11 is electrically connected with the first stepper motor 1 to control the rotating speed of the first stepper motor 1.

[0036] The automatic control system based on the single-chip microcomputer STM32F103RCT6 controls the forward and reverse rotation of the first stepper motor 1 through the signal receiving unit 11 to achieve the purpose of moving the welding gun 2. At the same time, the forward and reverse rotation of the second stepper motor 4 and the third stepper motor 5 is controlled based on the single-chip microcomputer STM32F103RCT6 to drive the first conveying belt 6 and the second conveying belt 7 to rotate respectively, so that the welding track can move horizontally along the direction of the to-be-welded slot; on the other hand, the moving speed of the welding gun 2 is related to the rotating speed of the first stepper motor 1 during welding, the welding gun 2 moves on the welding track 3 through the meshing of the gears, and through the gear transmission device, the welding gun 2 can be driven to move clockwise or counterclockwise outside the to-be-welded slot.

[0037] Working principle:

[0038] The automatic welding device of the application is moved to the vicinity of the workpiece to be welded, the welding torch 2 is fixed on the buckle, the workpiece to be welded is placed on the workbench and fixed at a suitable height using the clamping device, the welding torch 2 is passed through and aligned with the weld seam from the annular welding track 3; the weld seam tracking sensor detects the displacement of the welding torch 2 from the center horizontal line of the weld seam in real time and transmits the information to the STM32 single-chip microcomputer in the control unit 10; the contact displacement potential sensor detects the displacement of the welding torch 2 from the center height of the weld seam in real time and transmits the information to the STM32 single-chip microcomputer in the control unit 10, which then controls the rotation of the second stepper motor 4 and the third stepper motor 5 according to the received information, drives the first conveyor belt 6 and the second conveyor belt 7 to rotate, and the annular welding track 3 moves accordingly, driving the welding torch 2 to move until the welding torch 2 is precisely overlapped with the weld seam. Subsequently, the control unit 10 sends a driving signal to the signal receiving unit 11 through wireless transmission to control the rotation of the first stepper motor 1, drive the gear to rotate, and the rack to rotate accordingly, thereby driving the fixed plate and the welding torch 2 above it to move. After the position adjustment of the welding torch 2 is completed, the wire feeding and power supply control system is started, and the welding operation is performed. After welding the welds around the circumference, the work is stopped.

[0039] At the same time, the workpieces to be welded on both sides are clamped by auxiliary clamps during welding to reduce shaking and ensure smooth welding.

[0040] Example 1

[0041] The stainless steel wire slot welding device, as shown in Figure 1 , 2 , includes a fixed frame, support brackets 8 are vertically connected to the four corners of the fixed frame, respectively, each support bracket 8 has a universal wheel 9 connected to the lower end, facilitating movement, a transmission system is provided on the fixed frame, a welding execution system is provided on the transmission system, a weld positioning system and a welding torch 2 are provided on the welding execution system.

[0042] A control unit 10 is also provided on the fixed frame, the control unit 10 is electrically connected to the transmission system, and the control unit 10 is also signal connected to the welding execution system and the weld positioning system, respectively.

[0043] Example 2

[0044] The stainless steel wire slot welding device, as shown in Figure 1 , 2 , includes a fixed frame, support brackets 8 are vertically connected to the four corners of the fixed frame, respectively, each support bracket 8 has a universal wheel 9 connected to the lower end, facilitating movement, a transmission system is provided on the fixed frame, a welding execution system is provided on the transmission system, a weld positioning system and a welding torch 2 are provided on the welding execution system.

[0045] The fixed frame is further provided with a control unit 10, which is electrically connected with the transmission system, and is signal connected with the welding execution system and the weld positioning system respectively.

[0046] As shown in Figure 3 , the transmission system comprises a second stepper motor 4 and a third stepper motor 5 arranged on the two sides of the fixed frame respectively, the output shaft of the second stepper motor 4 is connected with a first driving wheel through a shaft coupling, the fixed frame is provided with a first driven wheel matched with the first driving wheel, the first driving wheel and the first driven wheel are connected through a first conveying belt 6, the output shaft of the third stepper motor 5 is connected with a second driving wheel through a shaft coupling, the fixed frame is provided with a second driven wheel matched with the second driving wheel, the second driving wheel and the second driven wheel are connected through a second conveying belt 7, and the welding execution system is connected on the first conveying belt 6 and the second conveying belt 7.

[0047] In operation, the control unit 10 controls the second stepper motor 4 and the third stepper motor 5 to work synchronously, drives the first driving wheel and the second driving wheel to rotate respectively, and drives the welding execution system to rotate through the rotation of the first conveying belt 6 and the second conveying belt 7, so as to help the welding gun 2 to be positioned and aligned with the weld.

[0048] Example 3

[0049] Based on the structure of example 2, as shown in Figure 4 , the welding execution system comprises a ring-shaped welding track 3, the ring-shaped welding track 3 is connected with the first conveying belt 6 and the second conveying belt 7 at two ends respectively, the ring-shaped welding track 3 is provided with a matched rack, the side wall of the rack is provided with a fixed plate, the first stepper motor 1 and a signal receiving unit 11 are mounted on the fixed plate respectively, the signal receiving unit 11 is signal connected with the control unit 10, and the signal receiving unit 11 is further electrically connected with the first stepper motor 1, the output shaft of the first stepper motor 1 penetrates through the fixed plate and is connected with a gear, the gear is meshed with the rack, and the welding gun 2 is arranged on the fixed plate, specifically, the fixed plate is provided with a buckle, the welding gun 2 is detachably arranged in the buckle, and the welding gun 2 can be fixed in the buckle through screwing, clamping and other ways, the position and angle of the welding gun 2 can be adjusted according to the welding requirements, including the height, angle and distance between the welding gun 2 and the workpiece, so as to ensure the welding quality, and the above connection mode belongs to the known technology, and the specific structure will not be described here.

[0050] In operation, the first stepper motor 1 is started to drive the gear to rotate, so as to control the welding gun 2 to move along the ring-shaped welding track 3.

[0051] Example 4

[0052] Based on the structure of example 3, as shown in Figure 5As shown, the welding positioning system comprises a laser module 12 arranged on a fixed plate, wherein the laser module 12 comprises a weld tracking sensor and a contact displacement potential sensor, the weld tracking sensor is used to detect the displacement of the welding gun and the weld center horizontal line in real time, and the contact displacement potential sensor is used to detect the displacement of the welding gun and the weld center height in real time, and the weld tracking sensor and the contact displacement potential sensor are electrically connected with the control unit 10.

[0053] Before welding, the laser module 12 can be used to assist in positioning the weld and checking whether the welding gap is appropriate. During welding, in order to ensure that the laser beam is always aligned with the weld, a weld tracking technology needs to be used. The basic principle of laser weld tracking is based on laser triangulation method: the laser module emits laser irradiation to the workpiece surface, and then the laser profile is imaged on the CCD or CMOS sensor after diffuse reflection. The controller processes and analyzes the collected images to obtain the position of the weld for guiding welding or correcting the welding track.

[0054] The welding positioning system of the device manually controls the start and stop of the motor to realize semi-automatic positioning of the weld.

[0055] Embodiment 5

[0056] Based on the structure of Embodiment 4, as shown in the figure, Figure 6 The control unit 10 comprises a switching power supply, the switching power supply is electrically connected with an STM32 single-chip microcomputer, the STM32 single-chip microcomputer is connected with two stepper motor drivers through a level conversion chip, and the two stepper motor drivers are connected with the second stepper motor 4 and the third stepper motor 5 respectively. The control unit 10 sends signals to the signal receiving unit 11, the signal receiving unit 11 is electrically connected with the first stepper motor 1 to control the rotating speed of the first stepper motor 1.

[0057] The automatic control system based on the single-chip microcomputer STM32F103RCT6 controls the forward and reverse rotation of the first stepper motor 1 through the signal receiving unit 11 to achieve the purpose of moving the welding gun 2. At the same time, the forward and reverse rotation of the second stepper motor 4 and the third stepper motor 5 are controlled based on the single-chip microcomputer STM32F103RCT6 to drive the first conveying belt 6 and the second conveying belt 7 to rotate respectively, so that the welding track can move horizontally along the direction of the to-be-welded slot; on the other hand, the moving speed of the welding gun 2 during welding is related to the rotating speed of the first stepper motor 1, the welding gun 2 moves on the welding track 3 through the meshing of the gears, and through the gear transmission device, the welding gun 2 can be driven to move clockwise or counterclockwise outside the to-be-welded slot.

[0058] Embodiment 6

[0059] Working principle:

[0060] The automatic welding device of the application is moved to the vicinity of the workpiece to be welded, the welding torch 2 is fixed on the buckle, the workpiece to be welded is placed on the workbench and fixed at a proper height by using the clamping device, the ring-shaped welding track 3 is passed through and aligned with the weld; the weld tracking sensor detects the displacement of the welding torch 2 from the center horizontal line of the weld in real time and transmits the information to the STM32 single-chip microcomputer in the control unit 10; the contact type displacement potential sensor detects the displacement of the welding torch 2 from the center height of the weld in real time and transmits the information to the STM32 single-chip microcomputer in the control unit 10, then the STM32 single-chip microcomputer controls the second step motor 4 and the third step motor 5 to rotate according to the received information, drives the first conveying belt 6 and the second conveying belt 7 to rotate, and the ring-shaped welding track 3 moves accordingly, driving the welding torch 2 to move, until the welding torch 2 is accurately overlapped with the weld, then the control unit 10 sends a driving signal to the signal receiving unit 11 through wireless transmission to control the first step motor 1 to rotate, driving the gear to rotate, the rack to rotate, and thus driving the fixed plate and the welding torch 2 above to move, after the position adjustment of the welding torch 2 is completed, the wire feeding and power supply control system is started, the welding operation is performed, and the work is stopped after the welding of the four surrounding welds is completed.

Claims

1. A stainless steel wire trough welding device, characterized in that, It includes a fixed frame, with support brackets (8) vertically connected to the four corners of the fixed frame. The fixed frame is equipped with a transmission system, and the transmission system is equipped with a welding execution system. The welding execution system is equipped with a weld positioning system and a welding torch (2). The fixed frame is also provided with a control unit (10), which is electrically connected to the transmission system and is also connected to the welding execution system and the weld positioning system respectively.

2. The stainless steel wire trough welding device according to claim 1, characterized in that, The transmission system includes a second stepper motor (4) and a third stepper motor (5) respectively disposed on both sides of the fixed frame. The output shaft of the second stepper motor (4) is connected to a first drive wheel. The fixed frame is provided with a first driven wheel that cooperates with the first drive wheel. The first drive wheel and the first driven wheel are connected by a first conveyor belt (6). The output shaft of the third stepper motor (5) is connected to a second drive wheel. The fixed frame is provided with a second driven wheel that cooperates with the second drive wheel. The second drive wheel and the second driven wheel are connected by a second conveyor belt (7). The welding execution system is connected to the first conveyor belt (6) and the second conveyor belt (7).

3. The stainless steel wire trough welding device according to claim 2, characterized in that, The first drive wheel is connected to the output shaft of the second stepper motor (4) via a coupling, and the second drive wheel is connected to the output shaft of the third stepper motor (5) via a coupling.

4. The stainless steel wire trough welding device according to claim 2, characterized in that, The welding execution system includes an annular welding track (3), with a first conveyor belt (6) and a second conveyor belt (7) connected to both ends of the annular welding track (3). The annular welding track (3) is provided with a matching rack, and a fixing plate is provided on the side wall of the rack. A first stepper motor (1) and a signal receiving unit (11) are respectively installed on the fixing plate. The signal receiving unit (11) is signal connected to the control unit (10) and is also electrically connected to the first stepper motor (1). The output shaft of the first stepper motor (1) rotates through the fixing plate and is connected to a gear. The gear meshes with the rack. The welding torch (2) is mounted on the fixing plate.

5. The stainless steel wire trough welding device according to claim 4, characterized in that, The fixing plate is provided with a buckle, and the welding gun (2) is detachably installed in the buckle.

6. The stainless steel wire trough welding device according to claim 5, characterized in that, The weld positioning system includes a laser module (12), which is mounted on a fixed plate. The laser module (12) includes a weld tracking sensor and a contact displacement potential sensor, both of which are electrically connected to the control unit (10).

7. The stainless steel wire trough welding device according to claim 6, characterized in that, The control unit (10) includes a switching power supply, which is electrically connected to an STM32 microcontroller. The STM32 microcontroller is connected to two stepper motor drivers via a level conversion chip. The two stepper motor drivers are connected to a second stepper motor (4) and a third stepper motor (5) respectively.

8. The stainless steel wire trough welding device according to claim 1, characterized in that, Each of the support brackets (8) is connected to a caster wheel (9) at its lower end.

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