A self-service workstation for replacing the tungsten needle of a welding torch

Abstract

A self-service workstation for replacing tungsten needles in welding guns comprises a circular conveyor line assembly, a number of loading units mounted on the conveyor line assembly, and a first, second, third, fourth, fifth, and sixth station, arranged sequentially on the outside of the conveyor line assembly. The first station is a tungsten needle placement station, the second station is a tungsten needle clamping station, the third station is a tungsten needle collection station, the fourth station is a tungsten needle grinding station, the fifth station is a tungsten needle clamp opening station, and the sixth station is a tungsten needle removal station. The first to fourth stations are located at the front end of the conveyor line assembly, while the fifth and sixth stations are located at the rear end of the conveyor line assembly, forming a "qualified tungsten needle storage area" between the fourth and fifth stations. Driven by the conveyor line assembly, any loading unit can be transported to a specific station. This workstation can complete the replacement of tungsten needles and automatically grind old tungsten needles, effectively improving the efficiency of robot welding.

Description

Technical Field

[0001] The invention relates to the technical field of tungsten electrode argon arc welding equipment, in particular to a workstation for replacing a tungsten needle of a welding gun by self-service. Background Art

[0002] With the rapid development of industrial automation, the use of robots to replace manual labor in tungsten inert gas welding is becoming increasingly widespread. In other words, more and more argon arc welding guns have become the terminal equipment of industrial robots. At present, in the application of robotic tungsten inert gas welding, the tungsten needle will wear out as the use period increases. At the same time, oil and dust on the workpiece surface will also accelerate the wear of the tungsten needle. At this time, manual operation is required to frequently replace the tungsten needle and perform subsequent grinding. This manual operation method has the following problems:

[0003] 1) The machine needs to be shut down for replacement, which delays online production time;

[0004] 2) Manual replacement of tungsten needles requires entering dangerous areas, greatly increasing the risk of personal injury;

[0005] 3) It is impossible to detect the usage status of the tungsten needle, resulting in the inability to centrally collect unqualified tungsten needles with excessive wear;

[0006] 4) When entering the subsequent tungsten needle automatic grinding process, the actuator moves the welding gun to the specified position for grinding. If the length of the tungsten needle extended from the nozzle after manual clamping is inconsistent, the grinding disc and the tungsten needle will be inaccurately positioned, causing the tungsten needle to be misaligned after grinding and unqualified. At this time, the machine needs to be stopped to readjust the position, which will increase the time for tungsten needle grinding and affect the efficiency of robot tungsten inert gas arc welding.

[0007] Based on the above reasons, this application proposes a one-stop workstation for replacing tungsten needles for argon arc welding guns, which can automatically complete the unloading of old tungsten needles, the detection of old tungsten needles, the collection of unqualified old tungsten needles, the grinding of qualified old tungsten needles and the loading of ground tungsten needles, which can effectively improve the efficiency of robot tungsten electrode argon arc welding applications. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the present invention provides a workstation for replacing a tungsten needle of a welding gun by a self-service method, so as to overcome the deficiencies in the prior art.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A self-service workstation for replacing tungsten needles of welding guns comprises a ring-shaped conveyor line assembly, a plurality of loading units arranged on the conveyor line assembly, and a first station, a second station, a third station, a fourth station, a fifth station, and a sixth station arranged in sequence outside the conveyor line assembly, further comprising:

[0011] Each loading unit is provided with a tungsten needle clamp, and a clamp groove is provided on the tungsten needle clamp along the radial direction. A clamp block is hinged in the clamp groove, and a protrusion is provided on the non-hinged end of the clamp block, and the protrusion protrudes out of the clamp groove;

[0012] The first station is provided with a No. 1 sensor and a No. 1 support base, and the length of the No. 1 support base extends to the second station;

[0013] The second station is provided with a No. 2 servo slide, a No. 2 rotary clamping cylinder arranged on the No. 2 servo slide, a No. 2 clamping piece installed at the output end of the No. 2 rotary clamping cylinder, a No. 2 blocking cylinder installed with the output end facing the tungsten needle clamp, and a No. 2 blocking block arranged at the output end of the No. 2 blocking cylinder;

[0014] A collection box for unqualified tungsten needles is provided below the third station;

[0015] The fourth station is provided with a No. 4 servo slide, a No. 4 clamping cylinder arranged on the No. 4 servo slide, a No. 4 clamping piece installed at the output end of the No. 4 clamping cylinder, and a grinder assembly installed with the output end facing the tungsten needle clamp;

[0016] The fifth workstation is provided with a No. 5 support seat, a No. 5 servo slide, a No. 5 rotary clamping cylinder arranged on the No. 5 servo slide, a No. 5 clamp installed at the output end of the No. 5 rotary clamping cylinder, a No. 5 blocking cylinder installed with the output end facing the tungsten needle clamp, and a No. 5 blocking block arranged at the output end of the No. 5 blocking cylinder; the length of the No. 5 support seat extends to the sixth workstation.

[0017] Furthermore, the first station, the second station, the third station and the fourth station are sequentially arranged at the front end position of the conveyor line assembly, the fifth station and the sixth station are sequentially arranged at the rear end position of the conveyor line assembly, and there are multiple loading units between the fourth station and the fifth station. Under the drive of the conveyor line assembly, any loading unit can be transferred and aligned to the position of a certain station.

[0018] Furthermore, the conveyor line assembly includes a conveyor line base plate, a conveyor line drive motor, a conveyor line guide rail and several conveyor line trays; the conveyor line drive motor and the conveyor line guide rail are installed on the conveyor line base plate, the conveyor line tray is installed on the conveyor line guide rail, and each conveyor line tray is correspondingly provided with a loading unit.

[0019] Preferably, each of the loading units further includes a connecting block and a bearing seat; the tungsten needle clamp is connected to the inner ring of the bearing seat through an interference fit, the bearing seat is mounted and fixed on the connecting block, the connecting block is mounted and fixed on the conveyor line tray, and the tungsten needle to be replaced is loaded in the tungsten needle clamp.

[0020] Preferably, the No. 1 sensor is mounted on the No. 1 support seat via a sensor bracket, and the No. 1 support seat is mounted and fixed on the bottom plate of the conveyor line.

[0021] Preferably, the No. 2 servo slide and the No. 2 blocking cylinder are respectively fixed on the bottom plate of the conveyor line through brackets.

[0022] Furthermore, the grinder assembly includes a No. 4 grinding cylinder and a grinder arranged at the output end of the No. 4 grinding cylinder, and the grinder is provided with a flexible grinding belt.

[0023] Preferably, the No. 4 servo slide and the No. 4 grinding cylinder are respectively fixed on the conveyor line bottom plate through brackets.

[0024] Preferably, the No. 5 support seat, No. 5 servo slide and No. 5 blocking cylinder are respectively fixed on the conveyor line bottom plate through brackets.

[0025] Preferably, each of the first to sixth workstations is externally provided with an enable signal detector.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1) The self-service workstation for replacing welding gun tungsten needles in this case can detect unloaded old tungsten needles, collect unqualified old tungsten needles, grind qualified old tungsten needles, and load the ground tungsten needles, which can effectively improve the efficiency of robot tungsten inert gas arc welding applications.

[0028] 2) The self-service workstation for replacing welding gun tungsten needles in this case can quickly collect old tungsten needles and quickly provide new polished tungsten needles, making replacement fast.

[0029] 3) The self-service workstation for replacing welding gun tungsten needles in this case is equipped with a "qualified tungsten needle storage area" to ensure sufficient tungsten needles for recycling and long-term maintenance-free operation.

[0030] 4) In this case, the workstation for replacing the welding gun tungsten needle is self-service. After the tungsten needle is clamped, it is automatically ground using a flexible grinding belt. The grinding quality of the tungsten needle is high, the centering is good, and the tungsten needle does not deform during grinding.

[0031] 5) The whole equipment runs automatically without manual operation, reducing the time and risk of manual replacement of tungsten needles and the unstable replacement quality.

[0032] In order to more clearly understand the present invention, preferred embodiments of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the loading unit in the present invention;

[0035] Figure 3 Schematic diagram of the structure of the tungsten needle clamp in the present invention;

[0036] Figure 4 This is a schematic structural diagram of the second station in the present invention;

[0037] Figure 5 This is a schematic structural diagram of the fourth station in the present invention;

[0038] Figure 6 It is a structural schematic diagram of the fifth workstation in the present invention.

[0039] Figure ID:

[0040] 1-first workstation, 2-second workstation, 3-third workstation, 4-fourth workstation, 5-fifth workstation, 6-sixth workstation, 7-conveyor line assembly, 8-loading unit, 9-tungsten needle; 12-support seat No. 1; 21-servo slide No. 2, 22-rotary clamping cylinder No. 2, 23-clamp No. 2, 24-blocking cylinder No. 2; 31-unqualified tungsten needle collection box; 41-servo slide No. 4, 42-clamping cylinder No. 4, 43-clamp No. 4, 44-grinding cylinder No. 4, 45-flexible grinding belt; 51-support seat No. 5, 52-servo slide No. 5, 53-rotary clamping cylinder No. 5, 54-clamp No. 5, 55-blocking cylinder No. 5; 81-tungsten needle clamp, 82-hoop groove, 83-hoop block, 831-protrusion of the hoop block. DETAILED DESCRIPTION

[0041] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] In addition, if terms such as "first" and "second" are used for descriptive purposes only, they are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0043] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Please also see Figure 1-6 The present invention provides a self-service workstation for replacing tungsten needles of welding guns, comprising a circularly rotating conveyor line assembly 7, a plurality of loading units 8 arranged on the conveyor line assembly 7, and a first workstation 1, a second workstation 2, a third workstation 3, a fourth workstation 4, a fifth workstation 5 and a sixth workstation 6 arranged in sequence on the outside of the conveyor line assembly 7; the first workstation 1 is a tungsten needle placing workstation, the second workstation 2 is a tungsten needle clamping workstation, the third workstation 3 is a tungsten needle collecting workstation, the fourth workstation 4 is a tungsten needle grinding workstation, the fifth workstation 5 is a tungsten needle clamp opening workstation, and the sixth workstation 6 is a tungsten needle taking out workstation; wherein, the first workstation 1, the second workstation 2, the third workstation 3 and the fourth workstation 4 are arranged in sequence at the front end position of the conveyor line assembly 7, the fifth workstation 5 and the sixth workstation 6 are arranged in sequence at the rear end position of the conveyor line assembly 7, and a plurality of the loading units 8 are separated between the fourth workstation 4 and the fifth workstation 5, so that a "qualified tungsten needle storage area" is formed between the fourth workstation 4 and the fifth workstation 5. Driven by the conveyor line assembly 7 , any loading unit 8 can be transferred and aligned to a certain workstation.

[0045] The conveyor assembly 7 includes a conveyor base, a conveyor drive motor, conveyor guide rails, and a plurality of conveyor trays. The conveyor drive motor and conveyor guide rails are mounted on the conveyor base, and the conveyor trays are mounted on the conveyor guide rails. Each conveyor tray is provided with a corresponding loading unit 8. During operation, the conveyor drive motor rotates, driving the conveyor trays to perform circular motion along the conveyor guide rails, thereby transporting and aligning a loading unit 8 to a specific workstation.

[0046] Each of the loading units 8 includes a connecting block, a bearing seat, and a tungsten needle clamp 81; the tungsten needle clamp 81 is connected to the inner ring of the bearing seat through interference fit, the bearing seat is mounted and fixed on the connecting block, the connecting block is mounted and fixed on the conveyor line tray, and the tungsten needle to be replaced is loaded in the tungsten needle clamp 81.

[0047] The tungsten needle clamp 81 is provided with a clamp groove 82 along the radial direction. A clamp block 83 is hinged in the clamp groove 82 . A protrusion 831 is provided at the non-hinged end of the clamp block 83 . The protrusion 831 protrudes out of the clamp groove 82 .

[0048] The principle of the tungsten needle clamp 81 clamping or loosening the tungsten needle is as follows: when the tungsten needle clamp 81 is rotated forward, the external blocking block presses against the protrusion 831 of the clamping block 83, and the clamping block 83 is pushed into the clamping groove 82, so that the tungsten needle can be clamped in the tungsten needle clamp 81; when the tungsten needle clamp 81 is rotated backward, the external blocking block presses against the protrusion 831 of the clamping block 83, and the clamping block 83 is pushed away from the clamping groove 82, so that the tungsten needle in the tungsten needle clamp 81 can be loosened.

[0049] The first workstation 1 is equipped with a No. 1 sensor (not shown) and a No. 1 support base 12. The No. 1 sensor is mounted on the No. 1 support base 12 via a sensor bracket. The No. 1 support base 12 is fixed to the conveyor line floor, and the length of the No. 1 support base 12 extends to the second workstation 2. When a loading unit 8 is operated and aligned to the first workstation 1, the welding robot's manipulator places the tungsten needle 9 to be replaced in the welding gun into the tungsten needle clamp 81 of the first workstation 1. At this time, the lower end of the tungsten needle 9 is supported by the No. 1 support base 12, and the tungsten needle 9 will not slip out of the tungsten needle clamp 81 on the first workstation 1.

[0050] The second workstation 2 is provided with a No. 2 servo slide 21, a No. 2 rotary clamping cylinder 22 arranged on the No. 2 servo slide 21, a No. 2 clamping piece 23 installed at the output end of the No. 2 rotary clamping cylinder 22, a No. 2 blocking cylinder 24 installed with the output end facing the tungsten needle clamp 81, and a No. 2 blocking block (not shown) arranged at the output end of the No. 2 blocking cylinder 24; the No. 2 servo slide 21 and the No. 2 blocking cylinder 24 are respectively fixed on the bottom plate of the conveyor line through brackets.

[0051] The principle of tightening the tungsten needle clamp 81 on the second workstation 2 is as follows: the No. 2 servo slide 21 drives the No. 2 rotary clamping cylinder 22 to descend, the No. 2 clamping piece 23 at the output end of the No. 2 rotary clamping cylinder 22 clamps the tungsten needle clamp 81, and the No. 2 rotary clamping cylinder 22 drives the tungsten needle clamp 81 to rotate forward; the No. 2 blocking cylinder 24 drives the No. 2 blocking block to extend, and the No. 2 blocking block is positively pressed against the protrusion 831 of the clamp block 83, pushing the clamp block 83 into the clamp groove 82, thereby clamping the tungsten needle 9 on the tungsten needle clamp 81.

[0052] An unqualified tungsten needle collection box 31 is provided under the third workstation 3; since the unqualified tungsten needles will not be clamped by the tungsten needle clamp 81 at the second workstation 2, the tungsten needles in the tungsten needle clamp 81 are in a loose state. When the tungsten needle clamp 81 on the second workstation 2 is transferred to the third workstation 3 along the conveyor line assembly 7, since the length of the No. 1 support seat 12 only covers the first workstation 1 and the second workstation 2, the tungsten needles in the tungsten needle clamp 81 lose the support of the No. 1 support seat 12, and the tungsten needles fall freely into the collection box 31, completing the centralized collection of unqualified tungsten needles.

[0053] The fourth workstation 4 is provided with a No. 4 servo slide 41, a No. 4 clamping cylinder 42 arranged on the No. 4 servo slide 41, a No. 4 clamping piece 43 installed at the output end of the No. 4 clamping cylinder 42, and a grinder assembly with the output end installed toward the tungsten needle clamp 81; the grinder assembly includes a No. 4 grinding cylinder 44, and a grinder arranged at the output end of the No. 4 grinding cylinder 44, and the grinder is provided with a flexible grinding belt 45; the No. 4 servo slide 41 and the No. 4 grinding cylinder 44 are respectively fixed on the bottom plate of the conveyor line through brackets.

[0054] The principle of automatic grinding of the tungsten needle at the fourth workstation 4 is as follows: the No. 4 servo slide 41 drives the No. 4 clamping cylinder 42 to descend, and the No. 4 clamping piece 43 at the output end of the No. 4 clamping cylinder 42 clamps the tungsten needle clamp 81. At this time, the tungsten needle 9 has been clamped in the tungsten needle clamp 81 at the third workstation 3; the No. 4 grinding cylinder 44 drives the grinder assembly to approach the tungsten needle 9 to be ground, and grinds the end of the tungsten needle 9 through the high-speed flexible grinding belt 45 on the grinder. After grinding is completed, the No. 4 clamping piece 43 releases the tungsten needle clamp 81, and the No. 4 servo slide 41 drives the No. 4 clamping cylinder 42 to rise, and the tungsten needle clamp 81 is transferred to the next workstation along the conveyor line assembly 7.

[0055] The fifth workstation 5 is provided with a No. 5 support seat 51, a No. 5 servo slide 52, a No. 5 rotary clamping cylinder 53 arranged on the No. 5 servo slide 52, a No. 5 clamping piece 54 installed at the output end of the No. 5 rotary clamping cylinder 53, a No. 5 blocking cylinder 55 installed with the output end facing the tungsten needle clamp 81, and a No. 5 blocking block (not shown) arranged at the output end of the No. 5 blocking cylinder 55; the No. 5 support seat 51, the No. 5 servo slide 52 and the No. 5 blocking cylinder 55 are respectively installed and fixed on the bottom plate of the conveyor line through brackets, and the length of the No. 5 support seat 51 extends to the sixth workstation 6.

[0056] The principle of opening the tungsten needle clamp 81 at the fifth workstation 5 is as follows: the No. 5 servo slide 52 drives the No. 5 rotary clamping cylinder 53 downward, and the No. 5 clamping piece 54 at the output end of the No. 5 rotary clamping cylinder 53 clamps the tungsten needle clamp 81, which then drives the tungsten needle clamp 81 to rotate in the opposite direction. The No. 5 blocking cylinder 55 drives the No. 5 blocking block to extend, which in turn presses against the protrusion 831 of the clamping block 83, pushing the clamping block 83 away from the clamping groove 82, thereby opening the tungsten needle clamp 81 that clamps the tungsten needle 9. At this time, the tungsten needle 9 in the tungsten needle clamp 81 is in a loose state. Because the bottom end of the tungsten needle 9 is supported by the No. 5 support seat 51, the tungsten needle 9 will not fall out of the tungsten needle clamp 81 during the transfer from the fifth workstation 5 to the sixth workstation 6.

[0057] The sixth station 6 is the tungsten needle removal station. The sixth station 6 and the fifth station 5 share the fifth support seat 51. The tungsten needle clamp 81 on the sixth station 6 has been opened at the fifth station 5. The tungsten needle 9 supported by the fifth support seat 51 is in a loose state, and the tungsten needle 9 in the tungsten needle clamp 81 has been ground.

[0058] The working process of the sixth workstation 6 is as follows: the robotic arm moves the welding gun to the top of the sixth workstation 6, aligns the welding gun with the tungsten needle on the sixth workstation 6, and the robotic arm moves downward with the welding gun. The tungsten needle in the tungsten needle clamp 81 is inserted into the welding gun. The welding gun automatically clamps the tungsten needle and then rises, completing the loading of the new tungsten needle on the welding gun.

[0059] Furthermore, each of the first to sixth workstations 1 to 6 is externally provided with an enable signal detector, which is used to detect and determine whether the enable signal of the tungsten needle clamp 81 passing through the workstation is "1" or "0".

[0060] The control process of a self-service workstation for replacing the welding gun tungsten needle in this case is as follows:

[0061] S1: Under the continuous driving of the conveyor line assembly 7, any loading unit 8 can be transferred and aligned to a certain workstation, and the cycle continues;

[0062] S2: The robot arm moves the welding gun (the welding gun is loaded with the tungsten needle to be replaced and ground) to the top of the first workstation 1, releases the tungsten needle from the welding gun, and the tungsten needle enters the tungsten needle clamp 81 of the first workstation 1;

[0063] S3: The No. 1 sensor on the first station 1 detects the length of the tungsten needle. If the tungsten needle has a qualified length, the enable signal of the tungsten needle clamp 81 is set to "1". If the tungsten needle has an unqualified length, the enable signal of the tungsten needle clamp 81 is set to "0".

[0064] S4: The tungsten needle clamp 81 is transferred to the second workstation 2. The second workstation 2 determines the enable signal of the current tungsten needle clamp 81. If it is "1", the No. 2 servo slide 21 drives the No. 2 rotary clamping cylinder 22 to descend, and the No. 2 clamping piece 23 at the output end of the No. 2 rotary clamping cylinder 22 clamps the tungsten needle clamp 81. The No. 2 rotary clamping cylinder 22 drives the tungsten needle clamp 81 to rotate forward; the No. 2 blocking cylinder 24 drives the No. 2 blocking block to extend, and the No. 2 blocking block positively presses against the protrusion 831 of the clamping block 83, pushing the clamping block 83 into the clamping groove 82, thereby clamping the tungsten needle 9 on the tungsten needle clamp 81; if the enable signal of the tungsten needle clamp 81 is "0", no action is taken. At this time, the tungsten needle in the tungsten needle clamp 81 is in a loose state;

[0065] S5: The tungsten needle clamp 81 is transferred to the third station 3. Since the first support seat is no longer supported, the tungsten needles with unqualified lengths fall freely into the unqualified tungsten needle collection box 31 under the action of their own gravity. The tungsten needles with qualified lengths have been clamped at the second station 2 and continue to the next station.

[0066] S5: The tungsten needle clamp 81 is transferred to the fourth workstation 4, and the enable signal detector detects the enable signal of the current tungsten needle clamp 81. When it is "1", the No. 4 servo slide 41 drives the No. 4 clamping cylinder 42 to descend, and the No. 4 clamping piece 43 at the output end of the No. 4 clamping cylinder 42 clamps the tungsten needle clamp 81. At this time, the tungsten needle has been clamped in the tungsten needle clamp 81 at the third workstation 3; the No. 4 grinding cylinder 44 drives the grinding machine assembly to approach the tungsten needle to be ground, and grinds the end of the tungsten needle through the high-speed flexible grinding belt 45 on the grinding machine. After grinding, the No. 4 clamping piece 43 releases the tungsten needle clamp 81, and the No. 4 servo slide 41 drives the No. 4 clamping cylinder 42 to rise. The tungsten needle clamp 81 is transferred to the next workstation along with the conveyor line assembly 7; if the enable signal of the tungsten needle clamp 81 is "0", it means that there is no tungsten needle in the tungsten needle clamp 81 and no action is taken;

[0067] S6: The tungsten needle holder 81 continues to be transferred on the conveyor assembly 7. Since there are multiple loading units 8 between the fourth station 4 and the fifth station 5, the tungsten needle holder 81 in this interval may contain a ground tungsten needle, or it may be empty (the unqualified tungsten needles have been collected at the third station 3). As a result, the area between the fourth station 4 and the fifth station 5 forms a "qualified tungsten needle storage area" that can store multiple qualified tungsten needles, which is more conducive to improving efficiency.

[0068] S7: The tungsten needle clamp 81 is transferred to the fifth workstation 5. The enable signal detector currently detects the enable signal of the tungsten needle clamp 81. If it is "1", the No. 5 servo slide 52 drives the No. 5 rotary clamping cylinder 53 to descend, and the No. 5 clamping piece 54 at the output end of the No. 5 rotary clamping cylinder 53 clamps the tungsten needle clamp 81. The No. 5 rotary clamping cylinder 53 drives the tungsten needle clamp 81 to rotate in the opposite direction; the No. 5 blocking cylinder 55 drives the No. 5 blocking block to extend, and the No. 5 blocking block presses against the protrusion 831 of the clamping block 83 in the opposite direction, pushing the clamping block 83 away from the clamping groove 82, so that the tungsten needle clamp 81 that clamps the tungsten needle is opened. At this time, the tungsten needle in the tungsten needle clamp 81 is in a loose state. Since the bottom end of the tungsten needle is supported by the No. 5 support seat 51, the tungsten needle will not fall off from the tungsten needle clamp 81 during the process of being transferred from the fifth workstation 5 to the sixth workstation 6; if the enable signal of the tungsten needle clamp 81 is "0", no action will be taken;

[0069] S8: The tungsten needle clamp 81 is transferred to the sixth workstation 6. At this time, the robotic arm moves the welding gun to the top of the sixth workstation 6, aligns the welding gun with the qualified tungsten needle on the sixth workstation 6, and the robotic arm moves downward with the welding gun. The tungsten needle is inserted into the welding gun. The welding gun clamps the tungsten needle and then rises to complete the loading of the new tungsten needle on the welding gun.

[0070] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A self-service workstation for replacing welding gun tungsten pins, comprising a ring-shaped conveyor line assembly, a plurality of loading units disposed on the conveyor line assembly, and a first station, a second station, a third station, a fourth station, a fifth station, and a sixth station sequentially disposed outside the conveyor line assembly, characterized in that: The first station is the tungsten needle placement station, the second station is the tungsten needle clamping station, the third station is the unqualified tungsten needle collection station, the fourth station is the tungsten needle grinding station, the fifth station is the tungsten needle clamp opening station, and the sixth station is the tungsten needle removal station; Each loading unit is provided with a tungsten needle clamp, and a clamp groove is provided on the tungsten needle clamp along the radial direction. A clamp block is hinged in the clamp groove, and a protrusion is provided on the non-hinged end of the clamp block, and the protrusion protrudes out of the clamp groove; A No. 1 sensor and a No. 1 support base are provided on the first station, and the length of the No. 1 support base extends to the second station. The No. 1 sensor is used to detect the length of the tungsten needle, and the No. 1 support base is used to support the tungsten needle; The second workstation is provided with a No. 2 servo slide, a No. 2 rotary clamping cylinder arranged on the No. 2 servo slide, a No. 2 clamping piece installed at the output end of the No. 2 rotary clamping cylinder, a No. 2 blocking cylinder installed with the output end facing the tungsten needle clamp, and a No. 2 blocking block arranged at the output end of the No. 2 blocking cylinder; when the tungsten needle is clamped, the No. 2 clamping piece is used to clamp the tungsten needle clamp, and the No. 2 blocking block is positively pressed against the protrusion of the clamping block, pushing the clamping block into the clamping groove, thereby clamping the tungsten needle on the tungsten needle clamp; A collection box for unqualified tungsten needles is provided below the third station; The fourth station is provided with a No. 4 servo slide, a No. 4 clamping cylinder arranged on the No. 4 servo slide, a No. 4 clamping piece installed at the output end of the No. 4 clamping cylinder, and a grinder assembly installed with the output end facing the tungsten needle clamp; when the tungsten needle is being ground, the No. 4 clamping piece is used to clamp the tungsten needle clamp; The fifth workstation is provided with a No. 5 support seat, a No. 5 servo slide, a No. 5 rotary clamping cylinder arranged on the No. 5 servo slide, a No. 5 clamp installed at the output end of the No. 5 rotary clamping cylinder, a No. 5 blocking cylinder installed with the output end facing the tungsten needle clamp, and a No. 5 blocking block arranged at the output end of the No. 5 blocking cylinder; the length of the No. 5 support seat extends to the sixth workstation; when the tungsten needle clamp is opened, the No. 5 clamp is used to clamp the tungsten needle clamp, and the No. 5 blocking block is used to press against the protrusion of the clamp block in reverse, pushing the clamp block away from the clamp groove, so that the tungsten needle clamp that clamps the tungsten needle is opened, and the tungsten needle in the tungsten needle clamp is in a loose state, and the No. 5 support seat is used to support the tungsten needle.

2. The self-service workstation for replacing welding gun tungsten needles according to claim 1, characterized in that: The first station, the second station, the third station and the fourth station are sequentially arranged at the front end position of the conveyor line assembly, the fifth station and the sixth station are sequentially arranged at the rear end position of the conveyor line assembly, and there are multiple loading units between the fourth station and the fifth station. Under the drive of the conveyor line assembly, any loading unit can be transferred and aligned to the position of a certain station.

3. The self-service workstation for replacing welding gun tungsten needles according to claim 2, characterized in that: The conveyor line assembly includes a conveyor line base plate, a conveyor line drive motor, a conveyor line guide rail and several conveyor line trays; the conveyor line drive motor and the conveyor line guide rail are installed on the conveyor line base plate, the conveyor line tray is installed on the conveyor line guide rail, and each conveyor line tray is correspondingly provided with a loading unit.

4. The self-service workstation for replacing welding gun tungsten needles according to claim 3, characterized in that: Each of the loading units also includes a connecting block and a bearing seat; the tungsten needle clamp is connected to the inner ring of the bearing seat through interference fit, the bearing seat is mounted and fixed on the connecting block, the connecting block is mounted and fixed on the conveyor line tray, and the tungsten needle to be replaced is loaded in the tungsten needle clamp.

5. The self-service workstation for replacing welding gun tungsten needles according to claim 3, characterized in that: The No. 1 sensor is installed on the No. 1 support seat through the sensor bracket, and the No. 1 support seat is installed and fixed on the bottom plate of the conveyor line.

6. The self-service workstation for replacing welding gun tungsten needles according to claim 3, characterized in that: The No. 2 servo slide and No. 2 blocking cylinder are respectively fixed on the bottom plate of the conveyor line through brackets.

7. The self-service workstation for replacing welding gun tungsten needles according to claim 3, characterized in that: The grinder assembly includes a No. 4 grinding cylinder and a grinder arranged at the output end of the No. 4 grinding cylinder, and a flexible grinding belt is arranged on the grinder.

8. The self-service workstation for replacing welding gun tungsten needles according to claim 7, characterized in that: The No. 4 servo slide and the No. 4 grinding cylinder are respectively fixed on the conveyor line bottom plate through brackets.

9. The self-service workstation for replacing welding gun tungsten needles according to claim 3, characterized in that: The No. 5 support seat, No. 5 servo slide and No. 5 blocking cylinder are respectively installed and fixed on the conveyor line bottom plate through brackets.

10. The self-service workstation for replacing welding gun tungsten needles according to claim 3, characterized in that: Each of the first to sixth workstations is externally provided with an enable signal detector.

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