Tungsten electrode replacing device, welding robot and automatic robot welding system

Abstract

The utility model discloses a tungsten electrode replacing device, a welding robot and an automatic robot welding system. The device comprises a driving assembly arranged on a welding gun, a tungsten electrode placing device and a first tungsten electrode clamping device, wherein the tungsten electrode placing device and the first tungsten electrode clamping device are arranged within the moving range of the welding gun. The tungsten electrode placing device is used for placing a new tungsten electrode and elastically abutting against the placed new tungsten electrode; the first tungsten electrode clamping device is used for clamping a tungsten electrode to be replaced on a welding gun during replacement; the driving assembly is used for driving a second tungsten electrode clamping device in the welding gun to clamp or loosen the tungsten electrode. The driving assembly is arranged on the welding gun, the tungsten electrode placing device and the first tungsten electrode clamping device are arranged in the moving range of the welding gun, a tungsten electrode to be replaced on the welding gun can be pulled out through cooperation of the driving assembly and the first tungsten electrode clamping device, and a new tungsten electrode placed in the tungsten electrode placing device can be further embedded into the welding gun through the driving assembly. The automatic replacement of the tungsten electrode is realized, and the replacement efficiency is greatly improved, so that the welding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tungsten electrode replacement device, a welding robot and a robot automatic welding system and belongs to the field of welding technology. BACKGROUND

[0002] TIG welding (tungsten inert gas welding) is a kind of arc welding method using non-melting tungsten electrode, and the tungsten electrode does not melt in the welding process, but the tungsten electrode head will be abraded after being used for a period of time, and it is not easy to arc after being abraded, and the performance of stabilizing arc is poor, so as to affect the welding quality. Therefore, in the robot automatic welding system, the TIG welding robot needs to stop welding after being used for a period of time, and the tungsten electrode is replaced manually, and the replacement efficiency is low, and the welding efficiency is further restricted. SUMMARY

[0003] The utility model provides a kind of tungsten electrode replacement device, solve the problem disclosed in background technology.

[0004] According to one aspect of the present disclosure, a tungsten electrode replacement device is provided, comprising a drive assembly arranged on a welding torch, and a tungsten electrode placement device and a first tungsten electrode clamping device arranged within the movement range of the welding torch.

[0005] The tungsten electrode placement device is used to place a new tungsten electrode and elastically resist the placed new tungsten electrode.

[0006] The first tungsten electrode clamping device is used to clamp the tungsten electrode to be replaced on the welding torch during replacement.

[0007] The drive assembly is used to drive the second tungsten electrode clamping device in the welding torch to clamp or release the tungsten electrode.

[0008] Further, the tungsten electrode placement device comprises a placement hole, an elastic member is arranged in the placement hole, the new tungsten electrode is embedded in the placement hole, and the elastic member elastically resists the new tungsten electrode.

[0009] Further, the elastic member is an elastic sleeve, the elastic sleeve is coaxially arranged in the placement hole, the new tungsten electrode is embedded in the center hole of the elastic sleeve, and the inner wall of the center hole of the elastic sleeve elastically resists the new tungsten electrode.

[0010] Further, the placement hole is a through hole; a liftable abutting plate is arranged directly below the tungsten electrode placement device, and the bottom end of the tungsten electrode embedded in the through hole abuts against the top surface of the abutting plate.

[0011] Further, a collecting portion is arranged below the clamping end of the first tungsten electrode clamping device.

[0012] Further, a detection device is further arranged within the movement range of the welding torch, and the detection device is used to detect whether the tungsten electrode is replaced successfully.

[0013] Further, the detection device comprises a tungsten electrode positioning plate and a photoelectric sensing device arranged above the tungsten electrode positioning plate.

[0014] Further, the second tungsten electrode clamping device is a collet;

[0015] The driving assembly comprises a driving device and a middle hole rod, a bushing is arranged in an inner hole of the middle hole rod, a first end of the middle hole rod is connected to the driving device, the driving device is arranged on the welding torch, a driving end of the driving device extends into the inner hole from the first end of the middle hole rod and is connected to one end of the bushing, the driving device drives the bushing to move in the inner hole, one end of the collet extends into the inner hole from a second end of the middle hole rod and abuts against the other end of the bushing, the other end of the collet extends into a pipeline of the welding torch through which the tungsten electrode passes, and a tapered surface adapted to the collet is arranged in the pipeline.

[0016] According to another aspect of the present disclosure, a welding robot is provided, comprising the above-mentioned tungsten electrode replacement device.

[0017] According to another aspect of the present disclosure, a robot automatic welding system is provided, comprising the above-mentioned welding robot.

[0018] The utility model discloses reached beneficial effects: the utility model discloses be provided with driving assembly on the welding torch, be provided with tungsten electrode placing device and first tungsten electrode clamping device in the welding torch moving range, through the cooperation of driving assembly and first tungsten electrode clamping device, can pull out the tungsten electrode of waiting to replace on the welding torch, further through driving assembly, can embed the new tungsten electrode placed in tungsten electrode placing device into the welding torch, realized tungsten electrode automatic replacement, improved the replacement efficiency greatly, thereby improved the welding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a perspective view of the tungsten electrode replacement device;

[0020] Figure 2 It is a structural schematic view of the driving assembly;

[0021] Figure 3 It is a side view of the tungsten electrode replacement device;

[0022] Figure 4 It is a top view of the tungsten electrode replacement device. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one example embodiment is merely illustrative in nature and is in no way limiting on the present disclosure and its applications or uses. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present disclosure.

[0024] Unless otherwise specified, the relative arrangement of the components, the numerical values set forth in these embodiments do not limit the scope of the present disclosure.

[0025] Meanwhile, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship.

[0026] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification where appropriate.

[0027] In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative, and not as a limitation. Thus, other examples of example embodiments can have different values.

[0028] Meanwhile, in the description of the embodiments of the present application, the terms "first", "second", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features.

[0029] In order to solve the problem of low tungsten electrode replacement efficiency, the present disclosure provides a tungsten electrode replacement device, a welding robot and a robot automatic welding system. Specifically, a driving assembly 2 is added to the welding gun 1, a tungsten electrode placement device 3 and a first tungsten electrode clamping device 4 are added within the moving range of the welding gun 1. Through the cooperation of the driving assembly 2 and the first tungsten electrode clamping device 4, the tungsten electrode to be replaced on the welding gun 1 is pulled out, and then the new tungsten electrode placed in the tungsten electrode placement device 3 is embedded into the welding gun 1 through the driving assembly 2, realizing automatic replacement of the tungsten electrode.

[0030] Referring to Figures 1-3 , the tungsten electrode replacement device at least includes a driving assembly 2 arranged on the welding gun 1, and a tungsten electrode placement device 3 and a first tungsten electrode clamping device 4 arranged within the moving range of the welding gun 1; wherein the tungsten electrode placement device 3 is used to place a new tungsten electrode and elastically resist the placed new tungsten electrode; the first tungsten electrode clamping device 4 is used to clamp the tungsten electrode to be replaced on the welding gun 1 during replacement; the driving assembly 2 is used to drive the second tungsten electrode clamping device in the welding gun 1 to clamp or loosen the tungsten electrode.

[0031] Need to explain, in the welding torch 1 often with a second tungsten electrode holding device, such as tungsten electrode clamp, sleeve 24, in order to achieve automatic replacement of tungsten electrode, the need to drive the second tungsten electrode holding device clamping and loosening, for example, sleeve 24, see Figure 2 In some embodiments, the drive assembly 2 includes a drive device 21 and a middle hole rod 22, the inner hole of the middle hole rod 22 is embedded with a bushing 23, the first end of the middle hole rod 22 is connected to the drive device 21, the drive device 21 adopts the common cylinder or electric cylinder, the drive device 21 is fixed on the welding torch 1, the drive end of the drive device 21 extends into the inner hole from the first end of the middle hole rod 22 and connects one end of the bushing 23, the drive device 21 drives the bushing 23 to move in the inner hole, one end of the sleeve 24 extends into the inner hole from the second end of the middle hole rod 22 and abuts against the other end of the bushing 23, the other end of the sleeve 24 extends into the pipe in the welding torch 1 which passes through the tungsten electrode, and the pipe is fixed with a tapered surface which is matched with the sleeve 24.

[0032] The drive device 21 drives the bushing 23 to move downward in the middle hole rod 22, the bushing 23 abuts against the sleeve 24, the front end opening structure of the sleeve 24 abuts against the tapered surface, the front end of the sleeve 24 shrinks, clamping the tungsten electrode which extends into the pipe, the drive device 21 drives the bushing 23 to move upward in the middle hole rod 22, the bushing 23 does not abut against the sleeve 24, under the elastic effect of the front end opening structure of the sleeve 24, the sleeve 24 loosens the tungsten electrode, at this time the tungsten electrode can be pulled out of the welding torch 1.

[0033] Need to explain, the function of the tungsten electrode placing device 3 is to place new tungsten electrode, and in order to facilitate replacement, it is necessary to ensure that the placed new tungsten electrode is stable and cannot be shaken arbitrarily, therefore the above-mentioned tungsten electrode placing device 3 can be an elastic clamp which clamps new tungsten electrode.

[0034] Since the specification of the tungsten electrode replacement is consistent during a welding period, in some embodiments, the tungsten electrode placing device 3 adopts a tungsten electrode placing plate 31, the tungsten electrode placing plate 31 is provided with holes, the number of holes is determined according to the actual situation, for example, eight holes are provided in the figure (divided into two columns), the eight holes can place eight new tungsten electrodes, which can meet the use of the welding period, so it is not necessary to frequently supplement new tungsten electrodes into the tungsten electrode placing device 3.

[0035] The holes provided on the tungsten electrode placing plate 31 can be bottom closed placing holes 32, in order to facilitate the elastic abutment against the tungsten electrode, an elastic member will be installed in the placing hole 32, the new tungsten electrode is embedded into the placing hole 32, the elastic member elastically abuts against the new tungsten electrode, which is equivalent to that the elastic member and the inner wall of the placing hole 32 elastically clamp the tungsten electrode, so it is not only convenient to embed the tungsten electrode, but also convenient to pull out the tungsten electrode from the placing hole 32.

[0036] The elastic member can be a spring, a spring piece, an elastic sleeve, etc. In this embodiment, the elastic sleeve 33 is coaxially fixed in the placement hole 32, the new tungsten electrode is inserted into the middle hole of the elastic sleeve 33, and the inner wall of the middle hole of the elastic sleeve 33 elastically abuts against the new tungsten electrode. Compared with the spring and the spring piece, the elastic sleeve 33 can wrap the tungsten electrode, the tungsten electrode is uniformly stressed when clamped, the tungsten electrode is prevented from being damaged, and the tungsten electrode is also convenient to pull out.

[0037] It should be noted that the length of the tungsten electrode is different in different welding conditions. If a longer tungsten electrode is used and the bottom of the placement hole 32 is closed, the placed tungsten electrode will be unstable. Therefore, in some embodiments, the placement hole 32 is opened into a through hole, and the bottom end of the longer tungsten electrode can protrude from the bottom of the through hole.

[0038] Referring to Figure 3 , in order to ensure that the top end of the tungsten electrode is neat and consistent and can adapt to tungsten electrodes of different lengths, in some embodiments, a liftable abutting plate 8 is installed directly below the tungsten electrode placement device 3, and the bottom end of the tungsten electrode inserted into the through hole abuts against the top surface of the abutting plate 8. The lifting structure of the abutting plate 8 can adopt an existing lifting structure, such as a lead screw lifter.

[0039] Before placing the new tungsten electrode, the height of the abutting plate top can be adjusted according to the length of the new tungsten electrode, and then the new tungsten electrode is inserted into the elastic sleeve 33 until the bottom end of the new tungsten electrode abuts against the top surface of the abutting plate 8.

[0040] It should be noted that the first tungsten electrode clamping device 4 is a controllable tungsten electrode clamping device, such as a pneumatic gripper or an electric gripper. When replacing, the first tungsten electrode clamping device 4 clamps the tungsten electrode to be replaced on the welding gun 1, the drive clamping sleeve 24 releases the tungsten electrode to be replaced, and the welding gun 1 is moved upward to pull out the tungsten electrode to be replaced from the welding gun 1.

[0041] In some embodiments, a collection part 5 is installed below the clamping end of the first tungsten electrode clamping device 4, specifically a collection box with an open top. After the tungsten electrode to be replaced is pulled out, the first tungsten electrode clamping device 4 is released, and the tungsten electrode will automatically fall into the collection box, thereby completing the collection of the tungsten electrode and preventing the pulled-out tungsten electrode from being thrown around.

[0042] Since the tungsten electrode replacement device is automatically replaced, in order to ensure that the replacement of the tungsten electrode is successful, referring to Figure 4 , in some embodiments, a detection device 6 is installed within the moving range of the welding gun 1. The detection device 6 is used to detect whether the replacement of the tungsten electrode is successful. Specifically, the detection device 6 can include a tungsten electrode positioning plate 62 and a photoelectric sensing device 61, such as a recess type power-off switch, installed above the tungsten electrode positioning plate 62.

[0043] After the new tungsten electrode is inserted into the welding gun 1 in the tungsten electrode placing device 3, the welding gun 1 is moved to above the detection device 6 (here, the position of movement is fixed), the clamping sleeve 24 is driven to loosen the new tungsten electrode, the tungsten electrode freely falls through the groove-shaped power-off switch, the bottom end of the tungsten electrode falls on the tungsten electrode positioning plate 62, if the groove-shaped power-off switch does not detect the tungsten electrode, it indicates that the tungsten electrode replacement is not successful, and the welding gun 1 is controlled to return to the tungsten electrode placing device 3 in the original route (here, the control method is a conventional control method, that is, after receiving the signal that the tungsten electrode is not detected, the welding gun 1 is controlled to return to the tungsten electrode placing device 3 in the original route), if the groove-shaped power-off switch detects the tungsten electrode, it indicates that the tungsten electrode replacement is successful, the clamping sleeve 24 is driven to clamp the new tungsten electrode again, and the welding gun 1 is controlled to continue the subsequent welding work. At this time, the height of the tungsten electrode relative to the welding gun 1 after each replacement can be ensured to be consistent through the detection device 6, and the welding quality is further ensured.

[0044] It should be noted that, referring to Figure 1 , 3 and 4, in order to improve the replacement efficiency, the tungsten electrode placing device 3, the first tungsten electrode clamping device 4, the detection device 6, the abutting plate 8, the collecting part 5 and the like are all installed on the same platform 7, as shown in the figure, the tungsten electrode placing device 3 is installed on the top surface of the platform 7, the top surface is provided with a hole opposite to the through hole, so as to facilitate the extension of the tungsten electrode, the abutting plate 8 is installed on the bottom surface of the platform 7 in a lifting manner, the first tungsten electrode clamping device 4 is installed on one end of the platform 7, the collecting part 5 is installed on the supporting leg of the platform 7, and the detection device 6 is installed on one side of the platform 7.

[0045] The working process of the above-mentioned tungsten electrode replacement device is as follows:

[0046] When the tungsten electrode needs to be replaced, the welding robot drives the welding gun 1 to the position of the first tungsten electrode clamping device 4, the first tungsten electrode clamping device 4 is driven to clamp the tungsten electrode to be replaced, the clamping sleeve 24 is driven to loosen the tungsten electrode to be replaced, the welding robot drives the welding gun 1 to the position of the tungsten electrode placing device 3 (i.e. the position of a new tungsten electrode), the welding gun 1 is lowered to an appropriate position, the clamping sleeve 24 is driven to clamp the inserted new tungsten electrode, the welding gun 1 is moved to above the detection device 6, the clamping sleeve 24 is driven to loosen the new tungsten electrode, the tungsten electrode freely falls through the groove-shaped power-off switch, the bottom end of the tungsten electrode falls on the tungsten electrode positioning plate 62, if the groove-shaped power-off switch does not detect the tungsten electrode, it indicates that the tungsten electrode replacement is not successful, and the welding gun 1 is controlled to return to the tungsten electrode placing device 3 in the original route, if the groove-shaped power-off switch detects the tungsten electrode, it indicates that the tungsten electrode replacement is successful, the clamping sleeve 24 is driven to clamp the new tungsten electrode again, and the welding gun 1 is controlled to continue the subsequent welding work.

[0047] The device is characterized in that the driving assembly 2 is arranged on the welding gun 1, the tungsten electrode placing device 3 and the first tungsten electrode clamping device 4 are arranged in the moving range of the welding gun 1, the tungsten electrode to be replaced on the welding gun 1 can be pulled out through cooperation of the driving assembly 2 and the first tungsten electrode clamping device 4, and the new tungsten electrode placed in the tungsten electrode placing device 3 can be embedded into the welding gun 1 through the driving assembly 2, so that the automatic replacement of the tungsten electrode is realized, the replacement efficiency is greatly improved, and the welding efficiency is improved.

[0048] The present disclosure also relates to a welding robot comprising the above-mentioned tungsten electrode replacing device, in particular, the driving assembly 2 is additionally arranged on the welding gun 1, the tungsten electrode placing device 3, the first tungsten electrode clamping device 4 and the detection device 6 are additionally arranged in the moving range of the welding gun 1.

[0049] The present disclosure also relates to a robot automatic welding system comprising the above-mentioned welding robot, in particular, the driving assembly 2 is additionally arranged on the welding gun 1 of all the welding robots in the system, the tungsten electrode placing device 3, the first tungsten electrode clamping device 4 and the detection device 6 are additionally arranged in the moving range of the welding gun 1.

[0050] The above-mentioned is only the preferred embodiment of the present disclosure, and it should be pointed out that, for the ordinary skilled in the art, without departing from the technical principles of the present disclosure, a number of improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection range of the present disclosure.

Claims

1. A tungsten electrode replacement device characterized by comprising: The driving assembly is arranged on the welding gun, and the tungsten electrode placing device and the first tungsten electrode clamping device are arranged within the moving range of the welding gun; The tungsten electrode placing device is used to place a new tungsten electrode and elastically abut the placed new tungsten electrode; The first tungsten electrode clamping device is used to clamp the tungsten electrode to be replaced on the welding gun during replacement; The driving assembly is used to drive the second tungsten electrode clamping device in the welding gun to clamp or release the tungsten electrode.

2. The apparatus of claim 1, wherein, The tungsten electrode placing device comprises a placing hole, an elastic member is arranged in the placing hole, and the new tungsten electrode is embedded in the placing hole and elastically abutted by the elastic member.

3. The apparatus of claim 2, wherein, The elastic member is an elastic sleeve, the elastic sleeve is coaxially arranged in the placing hole, the new tungsten electrode is embedded in the middle hole of the elastic sleeve, and the inner wall of the middle hole of the elastic sleeve elastically abuts the new tungsten electrode.

4. The apparatus of claim 2, wherein, The placing hole is a through hole; a liftable abutting plate is arranged directly below the tungsten electrode placing device, and the bottom end of the tungsten electrode embedded in the through hole abuts the top surface of the abutting plate.

5. The apparatus of claim 1, wherein, A collecting part is arranged below the clamping end of the first tungsten electrode clamping device.

6. The apparatus of claim 1, wherein, A detection device is further arranged within the moving range of the welding gun, and the detection device is used to detect whether the replacement of the tungsten electrode is successful.

7. The apparatus of claim 6, wherein, The detection device comprises a tungsten electrode positioning plate and a photoelectric sensing device arranged above the tungsten electrode positioning plate.

8. The apparatus of claim 1, wherein, The second tungsten electrode clamping device is a clamping sleeve; The driving assembly comprises a driving device and a middle hole rod, a bushing is arranged in the inner hole of the middle hole rod, the first end of the middle hole rod is connected with the driving device, the driving device is arranged on the welding gun, the driving end of the driving device extends into the inner hole from the first end of the middle hole rod and is connected with one end of the bushing, the driving device drives the bushing to move in the inner hole, one end of the clamping sleeve extends into the inner hole from the second end of the middle hole rod and abuts the other end of the bushing, the other end of the clamping sleeve extends into the pipeline for the tungsten electrode in the welding gun, and a taper surface matched with the clamping sleeve is arranged in the pipeline.

9. A welding robot, characterized in that, The device of any one of claims 1-8.

10. A robotic automatic welding system characterized by, The welding robot of claim 9.

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