A tungsten needle online grinding device, welding system and use method

Abstract

The present invention provides a tungsten needle online grinding device, a welding system and a use method. The tungsten needle online grinding device comprises a welding gun, a tungsten needle arranged in the welding gun, a needle clamping mechanism for assisting the welding gun in adjusting the extension length of the tungsten needle, and a grinding mechanism for the tungsten needle. The grinding mechanism is driven by a reciprocating mechanism to reciprocate and grind the tungsten needle, and a surface contact grinding system is formed between the grinding end and the tungsten needle. The welding system comprises the tungsten needle online grinding device, a welding robot connected to the welding gun in the tungsten needle online grinding device, an electrical control cabinet for controlling the entire system, and a grinding support table integrating the needle clamping mechanism, a clamping mechanism, a grinding mechanism and a reciprocating mechanism in the tungsten needle online grinding device. The present invention adopts the device, which can not only grind the tungsten needle in the welding gun online without disassembling it, but also enable the entire grinding surface in the grinding mechanism to be ground during the grinding process, thereby ensuring the grinding quality of the tungsten needle.

Description

Technical Field

[0001] The invention relates to the technical field of tungsten needle grinding, and in particular to a tungsten needle online grinding device, a welding system and a use method. Background Art

[0002] There are various welding methods for existing welding robots, and robotic tungsten inert gas welding is one of them. Robotic tungsten inert gas welding uses tungsten electrode, and uses the arc between the tungsten electrode and the workpiece to melt the metal to form a weld. The tungsten electrode does not melt during welding, but only acts as an electrode. Helium or argon is fed into the nozzle of the electric welding torch to protect the electrode and the molten pool. Although the tungsten electrode will not melt during the welding process, the tungsten electrode head is easily worn and consumed due to various external factors after long-term welding, which affects the arc starting effect. Therefore, it needs to be polished after welding for a period of time. In order to ensure welding efficiency, the existing Chinese patent with an application date of 2016.03.30, publication number CN105750707A, and invention name "A Robotic Tungsten Inert Gas Welding System" discloses a device that can realize automatic grinding of tungsten electrode. However, the following problems still exist in the actual use of the equipment:

[0003] 1. When grinding the tungsten needle, they failed to consider the wear on the grinding end of the grinding mechanism during the long-term operation of the grinding mechanism, which is caused by only grinding with the tungsten needle at a fixed position;

[0004] 2. When adjusting the grinding length of the tungsten needle, the grinding device only adjusts the length of the tungsten needle through a tungsten pole top extension adjustment groove, and does not ensure that the tungsten needle is placed vertically in the groove during the adjustment process, thus affecting the adjustment and clamping quality of the welding gun on the tungsten needle;

[0005] 3. The grinding device fails to meet the requirements of good adjustment of the grinding length of tungsten needles of various specifications before grinding, and fails to achieve good limiting of tungsten needles of corresponding specifications during grinding, which affects the grinding accuracy of tungsten needles.

[0006] Therefore, our company carried out corresponding research and development. Summary of the invention

[0007] The main purpose of the present invention is to solve the problems existing in the prior art and to provide a tungsten needle online grinding device, a welding system and a method of use which can grind the tungsten needle in the welding gun online without disassembling the tungsten needle and can grind the entire grinding surface in the grinding mechanism during the grinding process, thereby ensuring the grinding quality of the tungsten needle.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a tungsten needle online grinding device, wherein the tungsten needle online grinding device includes a welding gun, a tungsten needle arranged in the welding gun, a needle clamping mechanism for assisting the welding gun to adjust the extension length of the tungsten needle, and a grinding mechanism for the tungsten needle. The grinding mechanism is driven by a reciprocating mechanism to reciprocate and grind the tungsten needle, and a surface contact grinding system is formed between its grinding end and the tungsten needle. The welding gun and the needle clamping mechanism cooperate to adjust the extension length of the tungsten needle in the welding gun to facilitate the online grinding of the tungsten needle, so that the tungsten needle can be polished without removing it separately, thereby improving the grinding efficiency. The cooperation between the grinding mechanism and the reciprocating mechanism not only realizes the grinding of the tungsten needle, but also enables the entire grinding surface in the grinding mechanism to be ground, effectively reducing the problem that only the same horizontal position on the grinding surface contacts the tungsten needle in the prior art, which not only easily causes wear of the grinding position of the grinding surface after long-term use, but also makes it difficult to ensure the grinding accuracy of the tungsten needle.

[0009] Furthermore, the welding gun includes a clamping seat, a welding gun shell clamped in the clamping seat, a reduction motor arranged on the welding gun shell, a connecting sleeve connected to the output end of the reduction motor, and a torque limiter sleeved on the end of the connecting sleeve. A tungsten needle is limited by sliding up and down in the connecting sleeve, and the tungsten needle passes through the torque limiter and its end extends out of the welding gun shell. The reduction motor drives the connecting sleeve to rotate forward or reverse to cooperate with the torque limiter to achieve locking or loosening of the tungsten needle. At the same time, the tungsten needle can be driven by the reduction motor to rotate to cooperate with the grinding mechanism to achieve grinding of the tungsten needle.

[0010] Furthermore, a wire feeding guide tube assembly is also connected to the clamping seat, and the wire feeding guide tube assembly supplies welding wire for the welding of the welding gun to cooperate with the welding gun to weld the workpiece.

[0011] Furthermore, argon gas and conductive tubes and cooling water inlet and outlet pipes are also arranged on the side of the welding gun housing. The argon gas and conductive tubes and cooling water inlet and outlet pipes are all penetrated on the clamping seat, and their output ends are connected to the inner cavity of the welding gun housing. The arrangement of the argon gas and conductive tube can provide suitable current for welding with the welding gun, and during the welding process, the argon gas is guided to the welding point between the welding gun and the workpiece through the tube, so as to isolate the air outside the welding area during welding, prevent oxidation of the welding area, and ensure the welding quality. The cooling water inlet and outlet pipes are used to cool the high temperature generated by the large current during welding, so as to ensure the safety of the welding process.

[0012] Furthermore, the needle clamping mechanism includes a guide rail, a parallel clamping cylinder inserted on the guide rail, and two groups of clamping jaws connected to the output end of the parallel clamping cylinder. The two groups of clamping jaws correspond to each other and slide toward each other on the guide rail. The parallel clamping cylinder drives the two groups of clamping jaws to move closer or farther toward each other along the guide rail to achieve reliable clamping or loosening of tungsten needles of various specifications, and the mechanism is highly practical.

[0013] Furthermore, the grinding mechanism includes a rotary drive vertically connected to the output end of the reciprocating mechanism, and a grinding head connected to the output end of the rotary drive. The grinding head is conical, and the rotary drive drives the grinding head to rotate to grind the tungsten needle. Driven by the reciprocating mechanism, the entire grinding surface in the grinding mechanism can be polished to avoid the problem that only the same horizontal position on the grinding surface is in long-term contact with the tungsten needle for grinding, which easily causes wear of the grinding position and reduces the service life of the grinding head.

[0014] Furthermore, the reciprocating mechanism includes a slide rail arranged correspondingly with an inclination, a slide seat arranged on the slide rail for sliding cooperation, and a reciprocating cylinder driving the slide seat to slide along the slide rail. The slide seat is vertically connected to a grinding mechanism, and the reciprocating cylinder drives the slide seat to slide back and forth along the inclined slide rail to drive the grinding mechanism to move accordingly. At the same time, with the cooperation of the conical grinding head in the grinding mechanism, the entire conical grinding surface of the grinding head can evenly grind the tungsten needle.

[0015] Furthermore, a clamping mechanism for tungsten needle grinding is provided above the grinding mechanism. The setting of the clamping mechanism further ensures the reliable positioning of tungsten needles of various specifications during the grinding process, thereby reducing the influence of the movement of the tungsten needles during the grinding process on the grinding accuracy and quality.

[0016] Furthermore, the clamping mechanism includes a connecting seat, a pin cylinder arranged on the connecting seat and two groups of adjacent driven pressure wheels, an active pressure wheel connected to the output end of the pin cylinder, and a clamping chamber formed between the two groups of driven pressure wheels and the active pressure wheel. The connecting seat forms a cutting angle on one side close to the grinding mechanism, and a through hole for placing the tungsten needle is provided on the connecting seat. The through hole is located in the clamping chamber area and extends to the wall where the cutting angle is located. The pin cylinder brings the active pressure wheel thereon to approach or move away from the two groups of driven pressure wheels to assist the tungsten needle to be clamped or loosened in the clamping chamber area, thereby realizing reliable grinding of tungsten needles of various specifications.

[0017] Furthermore, the clamping mechanism is arranged beside the needle clamping mechanism, the reciprocating mechanism is arranged obliquely below the needle clamping mechanism and the clamping mechanism, and the output end of the reciprocating mechanism is vertically connected to the grinding mechanism. The arrangement of the needle clamping mechanism, the clamping mechanism, the grinding mechanism and the reciprocating mechanism integrates the entire tungsten needle online grinding device into one, with a compact structure, which effectively reduces space occupancy and makes the device highly practical.

[0018] A welding system, wherein the welding system comprises the above-mentioned tungsten needle online grinding device.

[0019] Furthermore, the welding system also includes a welding robot connected to the welding gun in the tungsten needle online grinding device, an electrical control cabinet for controlling the entire system, and a grinding support table that integrates the needle clamping mechanism, the clamping mechanism, the grinding mechanism and the reciprocating movement mechanism in the tungsten needle online grinding device. The electrical control cabinet controls the welding robot to move the welding gun in space, so that it can not only weld the workpiece, but also cooperate with the various mechanisms in the tungsten needle online grinding device to realize the online grinding of the tungsten needle in the welding gun, thereby ensuring the working continuity of the entire welding system, improving work efficiency, and effectively avoiding the problem of needing to stop working and disassemble the tungsten needle for grinding after the welding gun has been welding for a period of time in the existing welding system, which is time-consuming and labor-intensive.

[0020] Furthermore, the welding robot is connected to the welding gun in the tungsten needle online grinding device through a connecting bracket.

[0021] Furthermore, the needle clamping mechanism, clamping mechanism, grinding mechanism and reciprocating mechanism in the tungsten needle online grinding device are integrated on a mounting plate, and the mounting plate is fixed on the grinding support table. The mounting plate fixes the various mechanisms in the tungsten needle online grinding device on the grinding support table to ensure the integrity of the entire tungsten needle online grinding device and facilitate the subsequent overall disassembly and maintenance.

[0022] A method for using the above-mentioned tungsten needle online grinding device, wherein the method for using is:

[0023] S1. Move the welding gun to the needle clamping mechanism;

[0024] S2, the needle clamping mechanism clamps the tungsten needle;

[0025] S3, the welding gun releases the tungsten needle and moves along the axis of the tungsten needle, moves away from the clamping mechanism for a certain distance, and then clamps the tungsten needle to complete the action of pulling out a section of the tungsten needle;

[0026] S4, the welding gun moves to the grinding mechanism again;

[0027] S5. The reciprocating mechanism drives the grinding mechanism to reciprocate and grind the tungsten needle to form a surface contact grinding system.

[0028] The above-mentioned online grinding method for the tungsten needle can effectively avoid the problem that when grinding the tungsten needle in the welding gun, the welding process needs to be interrupted and the machine needs to be stopped to remove the tungsten needle, thereby affecting the welding processing efficiency of the workpiece. In addition, the entire grinding surface in the grinding mechanism can be in contact with the tungsten needle during the reciprocating movement of the reciprocating mechanism without removing the tungsten needle, forming a surface contact grinding system, reducing the problem that only the grinding line at a fixed position on the grinding surface contacts the tungsten needle during the long-term grinding process, which easily causes wear to the position.

[0029] Furthermore, in the above step S2, the action of the needle clamping mechanism to clamp the tungsten needle is specifically that the parallel clamping cylinder drives the two sets of clamping jaws to slide toward each other along the guide rail until the two sets of clamping jaws abut against the tungsten needle, thereby completing the clamping of the tungsten needle.

[0030] Furthermore, in the above step S3, the action of the welding gun loosening / clamping the tungsten needle is specifically that the reduction motor reverses / forwards to drive the torque limiter to loosen / clamp the tungsten needle.

[0031] Furthermore, in the above step S4, after the welding gun moves to the grinding mechanism, the tungsten needle is passed through the clamping mechanism and is clamped thereby.

[0032] Furthermore, the action of the clamping mechanism to clamp the tungsten needle is specifically as follows: after the portion of the tungsten needle to be polished passes through the through hole in the clamping mechanism, the piston rod at the output end of the ejector cylinder extends out, and moves with the active pressure wheel toward the direction close to the driven pressure wheel until it abuts against the side wall of the tungsten needle above the connecting seat, and the piston rod at the output end of the ejector cylinder stops extending, confining the tungsten needle in the clamping chamber.

[0033] Furthermore, in the above step S5, the specific process of reciprocatingly grinding the tungsten needle is as follows:

[0034] a. First, make the rotary drive in the grinding mechanism rotate with the grinding head;

[0035] b. Restart the reduction motor in the welding gun to reverse, the torque limiter releases the tungsten needle, and the tungsten needle rotates with the reduction motor;

[0036] c. The reciprocating cylinder in the reciprocating mechanism pushes the slide seat to slide along the slide rail, and the grinding mechanism moves back and forth accordingly. In this process, the self-rotation of the grinding head and the reciprocating movement of the grinding mechanism as a whole make the entire conical surface of the grinding head the part to be polished by the tungsten needle, forming a surface contact grinding system.

[0037] The advantages and positive effects of the present invention are:

[0038] (1) The welding gun cooperates with the needle clamping mechanism to adjust the extension length of the tungsten needle in the welding gun to facilitate the online grinding of the tungsten needle, so that the tungsten needle can be ground without being removed separately, thereby improving the grinding efficiency. The cooperation between the grinding mechanism and the reciprocating mechanism not only realizes the grinding of the tungsten needle, but also enables the entire grinding surface in the grinding mechanism to be ground, effectively reducing the problem that only the same horizontal position on the grinding surface contacts the tungsten needle in the prior art. After long-term use, it is not only easy to cause wear on the grinding position of the grinding surface, but also it is difficult to ensure the grinding accuracy of the tungsten needle.

[0039] (2) The rotary drive drives the grinding head to rotate and grind the tungsten needle. Driven by the reciprocating mechanism, the entire grinding surface in the grinding mechanism can be ground, so as to avoid the problem that only the same horizontal position on the grinding surface is in contact with the tungsten needle for a long time, which easily causes wear of the grinding position and reduces the service life of the grinding head.

[0040] (3) The reciprocating cylinder pushes the slide seat to slide back and forth along the inclined slide rail, thereby driving the grinding mechanism to move accordingly. At the same time, with the cooperation of the conical grinding head in the grinding mechanism, the entire conical grinding surface of the grinding head can evenly grind the tungsten needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the tungsten needle online grinding device in the present invention.

[0042] Figure 2 yes Figure 1 Schematic diagram of the structure in another direction.

[0043] Figure 3 It is a structural schematic diagram of the welding gun in the present invention.

[0044] Figure 4 It is a schematic cross-sectional view of the welding gun in the present invention.

[0045] Figure 5 It is a structural schematic diagram of the needle clamping mechanism in the present invention.

[0046] Figure 6 It is a schematic diagram of the connection structure of the grinding mechanism and the reciprocating mechanism in the present invention.

[0047] Figure 7 It is a structural schematic diagram of the clamping mechanism in the present invention.

[0048] Figure 8 It is a structural schematic diagram of the welding system in the present invention.

[0049] Fig. 9 It is a block diagram of the control relationship between the controller and various electrical components in the present invention.

[0050] In the figure: welding gun 1, clamping seat 11, welding gun housing 12, reduction motor 13, connecting sleeve 14, torque limiter 15, sliding block 16, wire feeding guide tube assembly 17, argon gas and conductive tube 18, cooling water inlet and outlet pipe 19, tungsten needle 2, needle clamping mechanism 3, guide rail 31, parallel clamping cylinder 32, clamping claw 33, grinding mechanism 4, rotary drive 41, grinding head 42, reciprocating mechanism 5, slide rail 51, slide seat 52, reciprocating cylinder 53, clamping mechanism 6, connecting seat 61, ejector cylinder 62, driven pressure wheel 63, active pressure wheel 64, through hole 65, grinding support table 7, connecting bracket 8, mounting plate 9. DETAILED DESCRIPTION

[0051] In order to better understand the present invention, the present invention is further described below in conjunction with specific embodiments and drawings.

[0052] Embodiment 1

[0053] like Figure 1-Figure 7 As shown, a tungsten needle online grinding device includes a welding gun 1, a tungsten needle 2 arranged in the welding gun 1, a needle clamping mechanism 3 for assisting the welding gun 1 to adjust the extension length of the tungsten needle 2, and a grinding mechanism 4 for the tungsten needle 2. The grinding mechanism 4 is driven by a reciprocating mechanism 5 to reciprocate and grind the tungsten needle 2, and a surface contact grinding system is formed between its grinding end and the tungsten needle 2.

[0054] Furthermore, the welding gun 1 includes a clamping seat 11, a welding gun housing 12 clamped in the clamping seat 11, a reduction motor 13 arranged on the welding gun housing 12, a connecting sleeve 14 connected to the output end of the reduction motor 13, and a torque limiter 15 sleeved on the end of the connecting sleeve 14. The connecting sleeve 14 slides up and down to limit the tungsten needle 2, and the tungsten needle 2 passes through the torque limiter 15 and its end extends out of the welding gun housing 12.

[0055] Specifically, the tungsten needle 2 can be limited in the connecting sleeve 14 by sliding up and down through the sliding block 16, that is, it can slide up and down in the connecting sleeve 14, and can also be limited in the connecting sleeve 14 under the action of the friction between the sliding block 16 and the inner wall of the connecting sleeve 14, so that when the connecting sleeve 14 rotates with the reduction motor 13, it can also rotate with the connecting sleeve 14; a tightening sleeve is sleeved on the welding gun housing 12, and the tightening sleeve is clamped in the clamping seat 11 in cooperation, and a notch is provided on the tightening sleeve. This structural design facilitates the installation of the welding gun housing 12 with the tightening sleeve in the clamping seat 11, that is, the diameter of the tightening sleeve can be reduced by gathering the tightening sleeve, so that the welding gun housing 12 can be smoothly clamped in the clamping seat 11. At the same time, after the tightening sleeve is assembled in the clamping seat 11, under the action of its elastic restoring force, the tightening sleeve is tightened between the welding gun housing 12 and the clamping seat 11, thereby ensuring a reliable connection between the two.

[0056] Furthermore, a wire feeding guide tube assembly 17 is connected to the clamping seat 11 .

[0057] Specifically, the wire feeding guide tube assembly 17 is clamped by a connecting block and connected to one side of the clamping seat 11. Its structural composition and working principle can adopt the existing technology.

[0058] Furthermore, argon gas and conductive tubes 18 and cooling water inlet and outlet pipes 19 are also arranged on the side of the welding gun housing 12. The argon gas and conductive tubes 18 and cooling water inlet and outlet pipes 19 are all penetrated on the clamping seat 11, and their output ends are connected to the inner cavity of the welding gun housing 12.

[0059] Specifically, the argon gas and the conductive tube 18 are used to guide the appropriate current provided by the external power supply to the welding gun 1 through the tube, and during the welding process, the argon gas can also be introduced into the welding area of ​​the welding gun 1 through the tube for welding protection. The cooling water inlet and outlet pipe 19 imports and exports cooling water to dissipate heat from the welding gun 1 to ensure welding safety.

[0060] Furthermore, the needle clamping mechanism 3 includes a guide rail 31 , a parallel clamping cylinder 32 passing through the guide rail 31 , and two groups of clamping jaws 33 connected to the output end of the parallel clamping cylinder 32 . The two groups of clamping jaws 33 correspond to each other and slide toward each other on the guide rail 31 .

[0061] Specifically, the two groups of clamping jaws 33 are slidably disposed on the guide rail 31 via a slider.

[0062] Furthermore, the grinding mechanism 4 includes a rotation drive 41 vertically connected to the output end of the reciprocating mechanism 5, and a grinding head 42 connected to the output end of the rotation drive 41, and the grinding head 42 is conical.

[0063] Specifically, the rotary drive 41 can be set as a high-speed electric spindle, and the output end of the high-speed electric spindle is fixed with a grinding head 42, which can be a diamond graphite head. Of course, the grinding head 42 can also be a frustum or other special-shaped structure with a conical part for grinding tungsten needles, which will not be expanded here.

[0064] Furthermore, the reciprocating mechanism 5 includes a slide rail 51 arranged with a corresponding tilt, a slide seat 52 slidably arranged on the slide rail 51 , and a reciprocating cylinder 53 driving the slide seat 52 to slide along the slide rail 51 , and the slide seat 52 is vertically connected to the grinding mechanism 4 .

[0065] Specifically, the piston rod output end of the reciprocating cylinder 53 is connected to the slide 52, and the slide 52 is vertically fixed with the rotation drive 41 by a connecting block. In addition, the taper of the conical grinding surface of the grinding head 42 is consistent with the inclination angle of the inclined arrangement of the slide rail 51 (wherein, with the vertical direction as a reference, the angle between the generatrix of the conical grinding surface of the grinding head 42 and the vertical direction is equal to the angle between the axis of the slide rail 51 and the vertical direction), that is, the generatrix of the conical grinding surface of the grinding head 42 is parallel to the slide rail 51, so as to ensure that when the grinding mechanism 4 slides back and forth with the slide rail 51, the entire conical surface of the grinding head 42 can reciprocate and contact the tungsten needle 2 point by point to grind it.

[0066] Furthermore, a pressing mechanism 6 for grinding the tungsten needle 2 is provided above the grinding mechanism 4 .

[0067] Furthermore, the clamping mechanism 6 includes a connecting seat 61, a pin cylinder 62 arranged on the connecting seat 61, two groups of adjacent driven pressure wheels 63, an active pressure wheel 64 connected to the output end of the pin cylinder 62, and a clamping cavity formed between the two groups of driven pressure wheels 63 and the active pressure wheel 64. The connecting seat 61 forms a cutting angle on one side close to the grinding mechanism 4, and a through hole 65 for placing the tungsten needle 2 is provided on the connecting seat 61. The through hole 65 is located in the clamping cavity area and extends to the wall where the cutting angle is located.

[0068] Specifically, the driven pressure wheel 63 is rotatably arranged on the connecting seat 61 to reduce the limiting friction between the clamping mechanism 6 and the tungsten needle 2 and the influence on the rotation of the tungsten needle 2 during the process of the grinding mechanism 4 driving the tungsten needle 2 to rotate and grind. The inclination angle of the cutting angle is equal to the taper of the conical grinding surface of the grinding head 42, that is, with the vertical direction as a reference, the angle between the cutting angle and the vertical direction is equal to the angle between the generatrix of the conical grinding surface of the grinding head 42 and the vertical direction. Of course, the inclination angle of the cutting angle can also be set to be greater than the taper of the conical grinding surface of the grinding head 42. The through hole 65 is located on the center line between the two groups of driven pressure wheels 63 to ensure the reliability of the clamping of the tungsten needle 2 between the active pressure wheel 64 and the two groups of driven pressure wheels 63, and the grinding head 42 is arranged below the through hole 65.

[0069] Furthermore, the clamping mechanism 6 is arranged beside the needle clamping mechanism 3 , the reciprocating mechanism 5 is arranged obliquely below the needle clamping mechanism 3 and the clamping mechanism 6 , and the output end of the reciprocating mechanism 5 is vertically connected to the polishing mechanism 4 .

[0070] Specifically, the slide rail 51 is obliquely arranged below the clamping mechanism 6 and the ejector mechanism.

[0071] Embodiment 2

[0072] like Figure 1-Figure 9 As shown, a welding system, wherein the welding system adopts the tungsten needle online grinding device in the above-mentioned embodiment 1.

[0073] Furthermore, the welding system also includes a welding robot (not shown in the figure) connected to the welding gun 1 in the tungsten needle online grinding device, an electrical control cabinet (not shown in the figure) that controls the entire system, and a grinding support table 7 that integrates the needle clamping mechanism 3, clamping mechanism 6, grinding mechanism 4 and reciprocating movement mechanism 5 in the tungsten needle online grinding device.

[0074] Specifically, the electrical control cabinet includes a controller, which is electrically connected to the welding robot, welding gun 1, needle clamping mechanism 3, clamping mechanism 6, grinding mechanism 4 and reciprocating mechanism 5 to ensure the automated and efficient operation of the entire welding system. The setting of the grinding support table 7 supports the various mechanisms in the tungsten needle online grinding device in the welding system to cooperate with the welding stations in the welding system to ensure the working continuity of the entire welding process.

[0075] Furthermore, the welding robot is connected to the welding gun 1 in the tungsten needle online grinding device via a connecting bracket 8 .

[0076] Specifically, one end of the connecting bracket 8 is fixed to the clamping seat 11 in the welding gun 1 by bolts, and the other end is fixed to the welding robot.

[0077] Furthermore, the needle clamping mechanism 3 , the pressing mechanism 6 , the grinding mechanism 4 and the reciprocating mechanism 5 in the tungsten needle online grinding device are integrated on a mounting plate 9 , and the mounting plate 9 is fixed on the grinding support table 7 .

[0078] In addition, the specific models and specifications of the reduction motor 13, torque limiter 15, parallel clamp cylinder 32, high-speed electric spindle, reciprocating cylinder 53, ejector cylinder 62, welding robot and controller need to be determined by selection calculation based on the parameter specifications of the welding system and the welding range of the workpiece to be welded. The specific selection calculation method is the existing technology, and the controller is electrically connected to the reduction motor 13, torque limiter 15, parallel clamp cylinder 32, high-speed electric spindle, reciprocating cylinder 53, ejector cylinder 62, and welding robot. The specific electrical connection structure, connection method and control principle are the existing technology. This application has not made any improvements on this, so it will not be described in detail.

[0079] Embodiment 3

[0080] like Figure 1-Figure 7 As shown, a method for using the tungsten needle online grinding device according to the first embodiment above, wherein the method of use is,

[0081] S1, move the welding gun 1 to the needle clamping mechanism 3;

[0082] S2, the needle clamping mechanism 3 clamps the tungsten needle 2;

[0083] S3, the welding gun 1 releases the tungsten needle 2 and moves along the axis of the tungsten needle 2, moves away from the needle clamping mechanism 3 for a certain distance, and then clamps the tungsten needle 2 to complete the action of pulling out a section of the tungsten needle 2;

[0084] S4, the welding gun 1 is moved to the grinding mechanism 4;

[0085] S5, the reciprocating mechanism 5 drives the grinding mechanism 4 to reciprocate and grind the tungsten needle 2 to form a surface contact grinding system.

[0086] The above-mentioned online grinding method for the tungsten needle 2 can effectively avoid the problem that when grinding the tungsten needle 2 in the welding gun 1, the welding process needs to be interrupted and the machine needs to be stopped to disassemble the tungsten needle 2, thereby affecting the welding processing efficiency of the workpiece. In addition, the entire grinding surface in the grinding mechanism 4 can be in contact with the tungsten needle 2 during the reciprocating movement of the reciprocating mechanism 5 without disassembling the tungsten needle 2, forming a surface contact grinding system, reducing the problem that during the long-term grinding process, only the grinding line at a fixed position on the grinding surface contacts the tungsten needle 2, which easily causes wear to the position.

[0087] Furthermore, in the above step S2, the action of the needle clamping mechanism 3 clamping the tungsten needle 2 is specifically that the parallel clamping cylinder 32 drives the two sets of clamping jaws 33 to slide toward each other along the guide rail 31 until the two sets of clamping jaws 33 abut against the tungsten needle 2, thereby completing the clamping thereof.

[0088] Furthermore, in the above step S3 , the action of the welding gun 1 to loosen / clamp the tungsten needle 2 is specifically that the reduction motor 13 rotates reversely / forwardly to drive the torque limiter 15 to loosen / clamp the tungsten needle 2 .

[0089] Furthermore, in the above step S4, after the welding gun 1 moves to the grinding mechanism 4, the tungsten needle 2 is passed through the clamping mechanism 6 and is clamped thereby.

[0090] Furthermore, the action of the clamping mechanism 6 to clamp the tungsten needle 2 is specifically as follows: after the portion of the tungsten needle 2 to be polished passes through the through hole 65 in the clamping mechanism 6, the piston rod at the output end of the ejector cylinder 62 extends, and moves with the active pressure wheel 64 toward the direction close to the driven pressure wheel 63 until it abuts against the side wall of the tungsten needle 2 above the connecting seat 61, and the piston rod at the output end of the ejector cylinder 62 stops extending, limiting the tungsten needle 2 in the clamping chamber.

[0091] Furthermore, in the above step S5, the specific process of reciprocatingly grinding the tungsten needle 2 is as follows:

[0092] a. First, the rotary drive 41 in the grinding mechanism 4 rotates with the grinding head 42;

[0093] b. Restart the reduction motor 13 in the welding gun 1 to reverse, the torque limiter 15 releases the tungsten needle 2, and the tungsten needle 2 rotates with the reduction motor 13;

[0094] c. The reciprocating cylinder 53 in the reciprocating mechanism 5 pushes the slide seat 52 to slide along the slide rail 51, and the grinding mechanism 4 reciprocates accordingly. In this process, the rotation of the grinding head 42 and the overall reciprocating movement of the grinding mechanism 4 enable the entire conical surface of the grinding head 42 to be ground, forming a surface contact grinding system.

[0095] By using the tungsten needle online grinding device, welding system and use method provided by the present invention, the tungsten needle 2 in the welding gun 1 can be ground online without disassembling it, and during the grinding process, the entire grinding surface in the grinding mechanism 4 can be ground, thereby ensuring the grinding quality of the tungsten needle 2. The working process of the welding system using the tungsten needle online grinding device is as follows:

[0096] 1. Needle clamping. The controller in the electrical control cabinet controls the welding robot to move with the welding gun 1 to the needle clamping mechanism 3. At this time, the parallel clamping cylinder 32 drives the two sets of clamping jaws 33 to slide toward each other along the guide rail 31 until the two sets of clamping jaws 33 abut against the tungsten needle 2 to clamp it. Then, the controller controls the reduction motor 13 to reverse, the torque limiter 15 releases the tungsten needle 2, and the reduction motor 13 stops working. After that, the controller controls the welding robot to move a distance away from the tungsten needle 2 with the welding gun 1. Finally, the controller controls the reduction motor 13 to rotate forward, so that the torque limiter 15 locks the tungsten needle 2, and the reduction motor 13 stops working. At the same time, the parallel clamping cylinder 32 drives the two sets of clamping jaws 33 to slide toward each other along the guide rail 31 to release the tungsten needle 2, thereby completing the action of extracting a section of tungsten needle 2 from the welding gun 1.

[0097] 2. Grinding needle: the controller controls the welding robot to move the welding gun 1 to the clamping mechanism 6, and makes the part of the tungsten needle 2 to be ground pass through the through hole 65 in the clamping mechanism 6. Then, the controller controls the piston rod at the output end of the ejector cylinder 62 to extend, and move the active pressure wheel 64 toward the driven pressure wheel 63 until it abuts against the side wall of the tungsten needle 2 above the connecting seat 61. The piston rod at the output end of the ejector cylinder 62 stops extending, and the tungsten needle 2 is limited in the clamping chamber. After that, the controller first starts the high-speed electric spindle to rotate with the grinding head 42, and then starts The reduction motor 13 is reversed, and the torque limiter 15 releases the tungsten needle 2. The tungsten needle 2 rotates with the reduction motor 13 with the help of the friction between the sliding block 16 at its end and the inner wall of the connecting sleeve 14. Finally, the controller starts the reciprocating cylinder 53 to push the slide seat 52 to slide along the slide rail 51, and the grinding mechanism 4 moves back and forth accordingly. In this process, the self-rotation of the grinding head 42 and the overall reciprocating movement of the grinding mechanism 4 enable the grinding of the part of the tungsten needle 2 to be ground to be the entire conical surface of the grinding head 42, forming a surface contact grinding system, and completing the grinding of the tungsten needle 2;

[0098] 3. Welding. After completing step 2 above, the controller starts the reduction motor 13 to rotate forward, drives the torque limiter 15 to lock the tungsten needle 2, and turns off the reduction motor 13. The controller controls the welding robot to transfer the welding gun 1 to the welding station to weld the workpiece. During the welding process, the argon gas and the conductive tube 18 provide a suitable current for the welding of the welding gun 1, and during the welding process, the argon gas is guided to the welding point between the welding gun 1 and the workpiece through the tube to isolate the air outside the welding area during welding to prevent oxidation of the welding area. At the same time, the cooling water inlet and outlet pipe 19 is used to cool the high temperature generated by the large current during the welding process to ensure the safety of the welding process.

[0099] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. A tungsten needle online grinding device, characterized in that: The tungsten needle (2) online grinding device comprises a welding gun (1), a tungsten needle (2) arranged in the welding gun (1), a needle clamping mechanism (3) for assisting the welding gun (1) in adjusting the extension length of the tungsten needle (2), and a grinding mechanism (4) for the tungsten needle (2), wherein the grinding mechanism (4) is driven by a reciprocating mechanism (5) to reciprocately grind the tungsten needle (2), and a surface contact grinding system is formed between the grinding end of the grinding mechanism and the tungsten needle (2); A pressing mechanism (6) for grinding the tungsten needle (2) is also provided above the grinding mechanism (4); The clamping mechanism (6) comprises a connecting seat (61), a pin cylinder (62) arranged on the connecting seat (61), two groups of adjacent driven pressure wheels (63), an active pressure wheel (64) connected to the output end of the pin cylinder (62), and a clamping cavity formed between the two groups of driven pressure wheels (63) and the active pressure wheel (64). A cutting angle is formed on the connecting seat (61) near the grinding mechanism (4), and a through hole (65) for placing the tungsten needle (2) is provided on the connecting seat (61). The through hole (65) is located in the clamping cavity area and extends to the wall surface where the cutting angle is located.

2. The tungsten needle online grinding device according to claim 1 is characterized in that: The welding gun (1) comprises a clamping seat (11), a welding gun housing (12) clamped in the clamping seat (11), a reduction motor (13) arranged on the welding gun housing (12), a connecting sleeve (14) connected to the output end of the reduction motor (13), and a torque limiter (15) sleeved on the end of the connecting sleeve (14); a tungsten needle (2) is slidably limited in the connecting sleeve (14) up and down, and the tungsten needle (2) passes through the torque limiter (15) and its end protrudes out of the welding gun housing (12).

3. The tungsten needle online grinding device according to claim 1 is characterized in that: The needle clamping mechanism (3) comprises a guide rail (31), a parallel clamping cylinder (32) passing through the guide rail (31), and two groups of clamping jaws (33) connected to the output end of the parallel clamping cylinder (32), wherein the two groups of clamping jaws (33) correspond to each other and slide towards each other on the guide rail (31).

4. The tungsten needle online grinding device according to claim 1 is characterized in that: The grinding mechanism (4) comprises a rotary drive (41) vertically connected to the output end of the reciprocating mechanism (5), and a grinding head (42) connected to the output end of the rotary drive (41), wherein the grinding head (42) is conical.

5. The tungsten needle online grinding device according to claim 1 is characterized in that: The reciprocating mechanism (5) comprises slide rails (51) arranged with corresponding inclinations, a slide seat (52) arranged on the slide rails (51) in a sliding manner, and a reciprocating cylinder (53) driving the slide seat (52) to slide along the slide rails (51); the slide seat (52) is vertically connected to the grinding mechanism (4).

6. A welding system, characterized in that: The welding system comprises the tungsten needle online grinding device according to any one of claims 1-5.

7. The welding system according to claim 6, characterized in that: The welding system also includes a welding robot connected to a welding gun (1) in the tungsten needle online grinding device, an electrical control cabinet for controlling the entire system, and a grinding support table (7) that integrates a needle clamping mechanism (3), a clamping mechanism (6), a grinding mechanism (4) and a reciprocating mechanism (5) in the tungsten needle online grinding device.

8. A method for using the tungsten needle online grinding device according to any one of claims 1 to 5, characterized in that: The method of use is: S1, moving the welding gun (1) to the needle clamping mechanism (3); S2, a needle clamping mechanism (3) clamps the tungsten needle (2); S3, the welding gun (1) releases the tungsten needle (2) and moves along the axis of the tungsten needle (2), moves away from the needle clamping mechanism (3) for a certain distance, and then clamps the tungsten needle (2) to complete the action of pulling out a section of the tungsten needle (2); S4, the welding gun (1) is moved to the grinding mechanism (4); S5. The reciprocating mechanism (5) drives the grinding mechanism (4) to reciprocate and grind the tungsten needle (2), thereby forming a surface contact grinding system.

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