T-shaped laser spot welding gun device with jacking mechanism

Abstract

The invention provides a T-shaped laser spot welding gun device with a jacking mechanism, and belongs to the technical field of spot welding guns. Comprising a base, a transmission assembly, a laser assembly, a mounting seat, an air curtain assembly, a connecting seat and a copper nozzle, the transmission assembly is mounted on the base; the laser assembly comprises a fixing frame and a laser head, and the fixing frame is connected with the transmission assembly and can be driven by the transmission assembly to move in the laser direction so as to adjust the defocusing amount; the laser head is fixed on the fixing frame; the mounting seat is connected with the fixing frame; the air curtain assembly comprises a first air knife and a second air knife, and the first air knife and the second air knife are installed on the two sides of the installation base respectively. The connecting seat is detachably connected with the mounting seat and the copper nozzle respectively; the copper nozzle is used for outputting laser. The first air knife and the second air knife respectively blow out the first air curtain and the second air curtain which are perpendicular to the laser direction, so that splashes entering from the nozzle can be prevented from being sputtered onto a lens of the laser head, the lens is better protected, the service life of the lens is prolonged, the replacement period of the lens is prolonged, and the welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding guns, and in particular to a T-shaped laser spot welding gun device with a tightening mechanism. Background Art

[0002] Welding is one of the four major processes in automobile manufacturing. Improving welding quality, welding stability, welding efficiency and weld appearance is of great significance to automobile manufacturing technology. Traditional welding equipment has low melting efficiency and large heat-affected zone when welding aluminum body-in-white and multi-layer high-strength plates. If laser welding is used, the positive and negative defocus and numerical value of the laser head can be controlled to well control the welding quality. Therefore, laser welding is often used in the automobile manufacturing process.

[0003] Existing laser welding guns generally blow protective gas at the copper nozzle to prevent spatter from splashing into the copper nozzle during welding. However, in actual use, it is inevitable that spatter will splash into the copper nozzle and then splash onto the lens of the laser head, reducing the life of the lens. Summary of the invention

[0004] In view of this, the present invention proposes a T-type laser spot welding gun device with a tightening mechanism to solve the technical problem raised in the above background technology that in actual use, spatters will inevitably splash into the copper nozzle and then splash onto the lens of the laser head, thereby reducing the life of the lens.

[0005] The technical solution of the present invention is achieved in this way:

[0006] The present invention provides a T-shaped laser spot welding gun device with a tightening mechanism, comprising a base, a transmission assembly, a laser assembly, a mounting seat, an air curtain assembly, a connecting seat and a copper nozzle, wherein:

[0007] The transmission assembly is mounted on the base;

[0008] The laser assembly includes a fixing frame and a laser head. The fixing frame is connected to the transmission assembly and can move along the laser direction under the drive of the transmission assembly to adjust the defocus amount. The laser head is fixed on the fixing frame.

[0009] The mounting seat is connected to the fixing frame;

[0010] The air curtain assembly comprises a first air knife and a second air knife, wherein the first air knife and the second air knife are respectively mounted on two sides of the mounting seat, and respectively blow out a first air curtain and a second air curtain perpendicular to the laser direction;

[0011] The connecting seat is detachably connected to the mounting seat and the copper nozzle respectively;

[0012] The copper nozzle is used for outputting laser.

[0013] On the basis of the above technical solution, preferably, the installation positions of the first air knife and the second air knife and the mounting seat can be adjusted to adjust the distance between the first air curtain and the second air curtain.

[0014] On the basis of the above technical solution, preferably, a plurality of groups of first mounting holes and a plurality of groups of second mounting holes are respectively provided on both sides of the mounting seat; the first air knife comprises a first knife seat and a first blade body, the first knife seat is detachably connected to the first mounting hole, and the first blade body is connected to the first knife seat; the second air knife comprises a second knife seat and a second blade body, the second knife seat is detachably connected to the second mounting hole, and the second blade body is connected to the second knife seat.

[0015] On the basis of the above technical solution, preferably, the distance between the first air curtain and the second air curtain is 0 to 24 mm.

[0016] On the basis of the above technical solution, preferably, a light outlet channel is provided on the copper mouth, and the cross section of the light outlet channel is a waist-shaped circular hole.

[0017] On the basis of the above technical solution, preferably, the longitudinal section of the light outlet channel is trapezoidal, and the angle between the hypotenuse of the trapezoid and the central axis of the copper nozzle is 20-50°.

[0018] On the basis of the above technical solution, preferably, air pipe joints connected to the light outlet channel are provided on both sides of the copper nozzle, and the air pipe joints are used to be connected to a pipeline filled with protective gas.

[0019] On the basis of the above technical solution, preferably, the angle between the axis of the air outlet of the air pipe joint and the cross section of the copper nozzle is 5-10°, and the cross section of the copper nozzle is perpendicular to the central axis of the copper nozzle.

[0020] On the basis of the above technical solution, preferably, the transmission assembly includes a cylinder, a cross roller guide and a slider, the cylinder and the cross roller guide are both installed on the base, the cylinder is drivingly connected to the slider, and the fixed frame is respectively connected to the cross roller guide and the slider.

[0021] On the basis of the above technical solution, preferably, a speed regulating valve and a proportional valve are provided on the cylinder, the speed regulating valve is used to adjust the running speed of the cylinder, and the proportional valve is used to adjust the pressure of the cylinder.

[0022] Compared with the prior art, the T-type laser spot welding gun device with a tightening mechanism of the present invention has the following advantages:

[0023] Beneficial effects:

[0024] (1) The first air knife and the second air knife are respectively installed on both sides of the mounting seat to blow out the first air curtain and the second air curtain perpendicular to the laser direction, thereby preventing the spatter entering from the nozzle from splashing onto the lens of the laser head, better protecting the lens, increasing the life of the lens, and extending the replacement cycle of the lens, thereby improving the welding efficiency;

[0025] (2) The installation positions of the first air knife and the second air knife and the mounting seat can be adjusted to adjust the distance between the first air curtain and the second air curtain, so as to make targeted adjustments according to different splashing conditions to ensure that the splashing cannot splash onto the lens, thereby improving the reliability and stability of the device;

[0026] (3) The longitudinal section through the light outlet channel is trapezoidal, and the angle between the hypotenuse of the trapezoid and the central axis of the copper nozzle is 20-50°, so that the light outlet channel is gradually reduced. Such a setting has a better guiding effect on the gas, which can make the gas pressure required for the protective gas smaller and improve the energy utilization rate;

[0027] (4) The angle between the axis of the air outlet of the air pipe joint and the cross section of the copper nozzle is 5 to 10 degrees, so that the outlet angle of the shielding gas is optimal, which can make the quality of the weld better and improve the welding quality and reliability;

[0028] (5) The fixed frame is respectively connected to the cross roller guide and the slider, and the cylinder drives the slider to move, driving the fixed frame to move relative to the base, so as to adjust the defocus amount. When the cross roller guide is used for adjustment, its accuracy is higher when the movement stroke is short, so that the sensitivity of the defocus amount adjustment can be controlled to better adapt to the corresponding spot size, obtain the best melting depth and laser capacity, and achieve the best welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 Schematic diagram of the structure of a T-shaped laser spot welding gun device with a tightening mechanism in an embodiment of the present invention;

[0031] Figure 2 It is a schematic structural diagram of a hidden portion of the outer shell of a T-shaped laser spot welding gun device with a tightening mechanism in an embodiment of the present invention;

[0032] Figure 3is a schematic structural diagram of a transmission assembly in an embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of a fixing frame in an embodiment of the present invention;

[0034] Figure 5 is a three-dimensional diagram of a mounting base in an embodiment of the present invention;

[0035] Figure 6 is a front view of a mounting base in an embodiment of the present invention;

[0036] Figure 7 is a three-dimensional diagram of an air curtain assembly in an embodiment of the present invention;

[0037] Figure 8 is a front view of an air curtain assembly in an embodiment of the present invention;

[0038] Fig. 9 Schematic diagram of the structure of the copper nozzle in the embodiment of the present invention;

[0039] Fig.10 Schematic diagram of the structure of the laser, the first air curtain and the second air curtain in an embodiment of the present invention.

[0040] Description of reference numerals: 1-base, 2-transmission assembly, 3-laser assembly, 4-mounting seat, 5-air curtain assembly, 6-connecting seat, 7-copper nozzle, 8-trachea joint;

[0041] 100-laser, 200-first air curtain, 300-second air curtain;

[0042] 21-cylinder, 22-cross roller guide, 221-first guide, 222-second guide, 23-slider;

[0043] 31-fixed frame, 311-connecting plate, 312-first protection plate, 313-second protection plate, 314-third protection plate, 3141-maintenance window, 315-window door, 32-laser head;

[0044] 41-first mounting hole, 42-second mounting hole, 43-first air window, 44-second air window;

[0045] 51-first air knife, 511-first knife seat, 512-first knife body, 52-second air knife, 521-second knife seat, 522-second knife body;

[0046] 71-Light exit channel. DETAILED DESCRIPTION

[0047] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Reference Figure 1-10 As shown, the embodiment of the present invention provides a T-shaped laser spot welding gun device with a tightening mechanism, including a base 1, a transmission assembly 2, a laser assembly 3, a mounting seat 4, an air curtain assembly 5, a connecting seat 6 and a copper nozzle 7, wherein:

[0049] The base 1 is used to be connected and fixed to the frame of the welding machine tool.

[0050] The transmission assembly 2 is installed on the base 1;

[0051] The laser assembly 3 includes a fixing frame 31 and a laser head 32. The fixing frame 31 is connected to the transmission assembly 2 and can be moved along the direction of the laser 100 under the drive of the transmission assembly 2 to adjust the defocus amount. The laser head 32 is fixed on the fixing frame 31. The laser head 32 is used to emit the laser 100. The central axes of the mounting seat 4, the connecting seat 6 and the copper nozzle 7 are all collinear with the central axis of the laser 100.

[0052] The mounting seat 4 is connected to the fixing frame 31, the interior of the mounting seat 4 is penetrated along the direction of the laser 100, and a first air window 43 and a second air window 44 are respectively provided on both sides of the mounting seat 4;

[0053] The air curtain assembly 5 includes a first air knife 51 and a second air knife 52, which are respectively mounted on both sides of the mounting base 4, and respectively blow out a first air curtain 200 and a second air curtain 300 perpendicular to the direction of the laser 100, the first air curtain 200 is injected from the first air window 43, and the second air curtain 300 is injected from the second air window 44;

[0054] The connecting seat 6 is detachably connected to the mounting seat 4 and the copper nozzle 7 respectively; the detachable connection mode can facilitate the replacement of the connecting tube to adapt to connecting tubes of different lengths. The length of the connecting tube is adapted to the focal length of the laser head 32. Specifically, the focal length and the length of the connecting tube are adjusted in a one-to-one ratio. For example, if the focal length increases by 1 mm, the length of the connecting tube increases by 1 mm accordingly.

[0055] The copper nozzle 7 is used to output the laser 100 .

[0056] The present embodiment proposes that the first air knife 51 and the second air knife 52 are respectively installed on both sides of the mounting seat 4, and blow out the first air curtain 200 and the second air curtain 300 perpendicular to the direction of the laser 100, thereby preventing the spatter entering from the nozzle from splashing onto the lens of the laser head 32, better protecting the lens, increasing the life of the lens, and extending the replacement cycle of the lens, thereby improving the welding efficiency.

[0057] In some embodiments, the installation positions of the first air knife 51 and the second air knife 52 and the mounting seat 4 can be adjusted to adjust the distance between the first air curtain 200 and the second air curtain 300. By adjusting the installation positions of the first air knife 51 and the second air knife 52 and the mounting seat 4 to adjust the distance between the first air curtain 200 and the second air curtain 300, targeted adjustments can be made for different splashing conditions, and splashing can be further prevented from entering from the first air window 43 or the second air window 44 and splashing onto the lens, so as to ensure that the splashing cannot splash onto the lens, thereby improving the reliability and stability of the device.

[0058] In some embodiments, multiple groups of first mounting holes 41 and multiple groups of second mounting holes 42 are respectively provided on both sides of the mounting seat 4, and the multiple groups of first mounting holes 41 are equidistantly arranged on the inner wall of the first air window 43, and the multiple groups of second mounting holes 42 are equidistantly arranged on the inner wall of the second air window 44; the first air knife 51 includes a first knife seat 511 and a first blade 512, the first knife seat 511 is detachably connected to the first mounting hole 41, the first blade 512 is connected to the first knife seat 511, and the axis of the air outlet of the first blade body 512 is perpendicular to the direction of the laser 100; the second air knife 52 includes a second knife seat 521 and a second blade 522, the second knife seat 521 is detachably connected to the second mounting hole 42, the second blade 522 is connected to the second knife seat 521, and the air outlet direction of the second blade body 522 is perpendicular to the direction of the laser 100. The first knife seat 511 is detachably connected to the first mounting hole 41, and the second knife seat 521 is detachably connected to the second mounting hole 42, so that the mounting positions of the first air knife 51 and the second air knife 52 and the mounting seat 4 can be adjusted to adjust the distance between the first air curtain 200 and the second air curtain 300; and the first mounting hole 41 and the second mounting hole 42 are respectively located on both sides of the mounting seat 4, so that there will be no interference when adjusting the mounting position. Compared with the solution of setting it on one side, the structure is more compact and convenient for flexible layout in a limited narrow space.

[0059] In some embodiments, the spacing between the first air curtain 200 and the second air curtain 300 is 0-24 mm. By adjusting the spacing between the first air curtain 200 and the second air curtain 300 within the range of 0-24 mm, the lens can be protected in a full range, and each 8 mm is a level, and the spacing between two adjacent groups of first mounting holes 41 and the spacing between two adjacent groups of second mounting holes 42 can be a common divisor of 8 mm (for example, 8 mm, 4 mm, 2 mm), and the adjustment is convenient and quick.

[0060] In some other embodiments, the first tool holder 511 can be slidably connected to the mounting seat 4, and the first tool holder 511 can be driven to move by a corresponding driving member, and the movement stroke is controllable, so that the position of the first tool holder 511 can be automatically adjusted. The second tool holder 521 can be slidably connected to the mounting seat 4, and the second tool holder 521 can be driven to move by a corresponding driving member, so that the position of the second tool holder 521 can be automatically adjusted, thereby adjusting the distance between the first air curtain 200 and the second air curtain 300.

[0061] In some embodiments, the copper nozzle 7 is provided with a light outlet channel 71, and the cross section of the light outlet channel 71 is a waist-shaped circular hole. The setting of the waist-shaped circular hole allows the laser 100 to pass through, and there is a certain fault tolerance space, thereby improving the reliability and stability of the device.

[0062] In some embodiments, the longitudinal section of the light outlet channel 71 is trapezoidal, and the angle between the hypotenuse of the trapezoid and the central axis of the copper nozzle 7 is 20-50°. The longitudinal section of the light outlet channel 71 is trapezoidal, and the angle between the hypotenuse of the trapezoid and the central axis of the copper nozzle 7 is 20-50°, so that the light outlet channel 71 gradually decreases. Such a setting has a better guiding effect on the gas, can make the gas pressure required for the protective gas smaller, and improve energy utilization.

[0063] In some embodiments, air pipe joints 8 connected to the light outlet channel 71 are provided on both sides of the copper nozzle 7, and the air pipe joints 8 are used to connect to a pipe filled with protective gas. By installing two air pipe joints 8 on both sides of the copper nozzle 7, respectively, the protective gas is blown from both sides above the workpiece to be welded at the same time, which can improve the quality of welding and the aesthetic appearance of the weld.

[0064] In some embodiments, the angle between the axis of the air outlet of the air pipe joint 8 and the cross section of the copper nozzle 7 is 5-10°, and the cross section of the copper nozzle 7 is perpendicular to the central axis of the copper nozzle 7. The angle between the axis of the air outlet of the air pipe joint 8 and the cross section of the copper nozzle 7 is 5-10°, so that the outlet angle of the shielding gas is optimal, which can make the quality of the weld better and improve the welding quality and reliability.

[0065] In some embodiments, the transmission assembly 2 includes a cylinder 21, a cross roller guide 22 and a slider 23, the cylinder 21 and the cross roller guide 22 are both installed on the base 1, the cylinder 21 is drivingly connected to the slider 23, and the fixed frame 31 is respectively connected to the cross roller guide 22 and the slider 23. The cross roller guide 22 includes a first guide 221, a second guide 222 and a cylindrical roller. The first guide 221 and the second guide 222 are both provided with a V-shaped raceway. The cylindrical roller is located in the V-shaped raceway of the first guide 221 and the second guide 222. The first guide 221 is fixed to the base 1, and the second guide 222 is connected and fixed to the fixing frame 31. The fixing frame 31 is connected to the slider 23. The cylinder 21 pushes the slider 23 to move, so that the second guide 222 moves relative to the first guide 221, and the fixing frame 31 moves relative to the base 1, so as to adjust the defocus amount. The cross roller guide 22 is used for adjustment. When the movement stroke is short, its accuracy is higher, so that the sensitivity of the defocus amount adjustment can be controlled to better adapt to the corresponding spot size, obtain the best penetration depth and laser 100 capacity, so as to optimize the welding quality. In addition, the structure of the cylinder 21 and the cross roller guide 22 can greatly reduce the size of the transmission component 2, so that the entire device can be more miniaturized.

[0066] In some embodiments, a speed regulating valve and a proportional valve are provided on the cylinder 21, wherein the speed regulating valve is used to adjust the running speed of the cylinder 21, and the proportional valve is used to adjust the pressure of the cylinder 21. By adjusting the running speed of the cylinder 21 by the speed regulating valve, the time required for adjusting the defocus amount can be adjusted. Under the premise of ensuring the adjustment accuracy, the defocus amount can be adjusted to the required value as quickly as possible, which can improve the assembly efficiency of the device and thus improve the welding efficiency; by adjusting the pressure of the cylinder 21 by the proportional valve, the force of the cylinder 21 can be adjusted to avoid damage to the cross roller guide 22 due to excessive force, thereby improving the reliability of the device.

[0067] In some embodiments, the fixing frame 31 includes a connecting plate 311, a first protective plate 312, a second protective plate 313 and a third protective plate 314. The connecting plate 311 is used to connect to the slider 23. The first protective plate 312 and the second protective plate 313 are respectively connected to the two sides of the connecting plate 311. The third protective plate 314 is respectively connected to the first protective plate 312 and the second protective plate 313 and is located on the opposite side of the connecting plate 311. The four form a square protective space to protect the laser head 32. A maintenance window is provided on the third protective plate 314, and the maintenance window is closed by a window door 315. The window door 315 can be disassembled. The lens can be replaced without disassembling the entire fixing frame 31, which facilitates the replacement of the lens and saves the time for replacing the lens.

[0068] The working principle of the T-type laser spot welding gun device with a tightening mechanism proposed in this embodiment is: the cylinder 21 pushes the slider 23 to move, so that the second guide rail 222 moves relative to the first guide rail 221, realizes the movement of the fixing frame 31 relative to the base 1, and adjusts the defocus amount to a required value; the first air knife 51 and the second air knife 52 respectively blow out the first air curtain 200 and the second air curtain 300 perpendicular to the direction of the laser 100, which can prevent the spatters entering from the nozzle from splashing onto the lens of the laser head 32, and can further prevent the spatters from splashing onto the lens after entering from the first air window 43 or the second air window 44, so as to ensure that the spatters cannot splash onto the lens; through the two air pipe joints 8, the protective gas is blown simultaneously from both sides above the workpiece to be welded, which can improve the quality of welding and the aesthetic appearance of the weld.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A T-shaped laser spot welding gun device with a tightening mechanism, characterized in that: It includes a base, a transmission component, a laser component, a mounting seat, an air curtain component, a connecting seat and a copper nozzle, wherein: The transmission assembly is mounted on the base; The laser assembly includes a fixing frame and a laser head. The fixing frame is connected to the transmission assembly and can move along the laser emission direction under the drive of the transmission assembly to adjust the defocus amount. The laser head is fixed on the fixing frame. The mounting seat is connected to the fixing frame; The air curtain assembly comprises a first air knife and a second air knife, wherein the first air knife and the second air knife are respectively mounted on two sides of the mounting seat, and respectively blow out a first air curtain and a second air curtain perpendicular to the laser direction; The connecting seat is detachably connected to the mounting seat and the copper nozzle respectively; The laser passes through the copper nozzle and is projected onto the workpiece to be welded.

2. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 1, characterized in that: The mounting positions of the first air knife and the second air knife and the mounting seat can be adjusted to adjust the distance between the first air curtain and the second air curtain.

3. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 2, characterized in that: A plurality of groups of first mounting holes and a plurality of groups of second mounting holes are respectively provided on both sides of the mounting seat; the first air knife comprises a first knife seat and a first blade body, the first knife seat is detachably connected to the first mounting hole, and the first blade body is connected to the first knife seat; the second air knife comprises a second knife seat and a second blade body, the second knife seat is detachably connected to the second mounting hole, and the second blade body is connected to the second knife seat.

4. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 2, characterized in that: The distance between the first air curtain and the second air curtain is 0-24 mm.

5. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 1, characterized in that: The copper nozzle is provided with a light outlet channel, and the cross section of the light outlet channel is a rounded rectangle.

6. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 5, characterized in that: The longitudinal section of the light outlet channel is trapezoidal, and the angle between the hypotenuse of the trapezoid and the central axis of the copper nozzle is 20-50°.

7. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 5, characterized in that: Air pipe joints connected to the light outlet channel are arranged on both sides of the copper nozzle, and the air pipe joints are used to be connected to a pipeline filled with protective gas.

8. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 7, characterized in that: The angle between the axis of the air outlet of the air pipe joint and the cross section of the copper nozzle is 5-10 degrees, and the cross section of the copper nozzle is perpendicular to the central axis of the copper nozzle.

9. The T-shaped laser spot welding gun device with a tightening mechanism according to any one of claims 1 to 8, characterized in that: The transmission assembly includes a cylinder, a cross roller guide and a slider. The cylinder and the cross roller guide are both installed on the base. The cylinder is drivingly connected to the slider. The fixing frame is respectively connected to the cross roller guide and the slider.

10. The T-shaped laser spot welding gun device with a tightening mechanism as claimed in claim 9, characterized in that: The cylinder is provided with a speed regulating valve and a proportional valve, wherein the speed regulating valve is used to regulate the running speed of the cylinder, and the proportional valve is used to regulate the pressure of the cylinder.

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