A welding tungsten electrode automatic grinding and height calibration mechanism

Abstract

The utility model provides a welding tungsten electrode automatic polishing and height calibration mechanism, tungsten electrode positioning structure, automatic polishing mechanism and height calibration mechanism, wherein, automatic polishing mechanism includes: tungsten electrode polishing head, and the corresponding tungsten electrode is polished to the point of polishing through its rotary force, left and right translation air cylinder, and the air cylinder telescopic arm pushes and pulls tungsten electrode polishing head, and the tungsten electrode positioning structure includes: positioning clamp, clamps tungsten electrode and moves, displacement motor, drives positioning clamp movement, tungsten electrode positioning clamping jaw, and the jaw of the front clamping end can clamp the slender tungsten electrode vertically, the utility model discloses the automatic polishing and height calibration of welding tungsten electrode have been realized, effectively overcome the problem that need artificial inspection electrode state, replace electrode and calibrate electrode height, and further greatly improve the equipment efficiency and product processing quality, and it is extremely beneficial to product production and market promotion.

Description

Technical Field

[0001] This utility model relates to ignition coils, and more particularly to tungsten electrode welding equipment or production lines. Background Technology

[0002] Argon arc welding is widely used in the automotive manufacturing industry, but this welding process requires the use of tungsten electrodes. Tungsten electrodes are typically long, slender cylindrical rods with a cross-sectional diameter of less than 2mm. During welding, the tungsten electrode needs to maintain a fixed distance from the welding position, and its cross-section must be free of foreign objects and have a smooth surface. However, in automated equipment or production lines, it is impossible to constantly inspect the height and surface condition of the tungsten electrode. To ensure welding quality, production lines typically use manual methods to inspect the condition of the tungsten electrode.

[0003] During argon arc welding, the electrode typically needs grinding after several hundred welds. In actual production, alarm frequencies are usually set in automated equipment. When the alarm frequency is reached, the equipment alerts the employee to check the surface condition of the tungsten electrode, and the employee performs the corresponding operations. If the surface condition is poor, the tungsten electrode needs to be replaced, and the replaced tungsten electrode needs to be ground. There are two common methods for replacing the tungsten electrode: the first method is to use a calibration fixture for calibration; the second method is to use a cylinder or servo motor to move the tungsten electrode to a specific position with a calibration plane underneath. The tungsten electrode is installed in place, and the lower surface touching the calibration plane indicates that it is properly installed.

[0004] The existing method has the following problems:

[0005] 1) When employees inspect the surface condition of tungsten electrodes, human judgment is required. Due to operators' inaccurate understanding of the standards, the electrodes may not be polished in time, resulting in welding quality problems.

[0006] 2) The inspection process requires manual disassembly and reassembly of the tungsten electrode, which will cause equipment downtime and affect equipment output.

[0007] 3) Using tooling to calibrate tungsten electrodes involves long manual operation times and extended equipment downtime, impacting output. Furthermore, the tooling is difficult to store and easily lost. Incorrect tooling may also be used.

[0008] 4) The method of using a cylinder or servo motor to move the tungsten electrode and perform calibration achieves a certain degree of automation. However, this method still requires manual disassembly and assembly of the tungsten electrode and initiation of the calibration program, and is not optimal.

[0009] Therefore, there is an urgent need for a product to solve the above problems. Utility Model Content

[0010] The purpose of this invention is to provide an automatic grinding and height calibration mechanism for welding tungsten electrodes, so as to overcome the problems of manually checking the electrode status, replacing the electrode, and calibrating the electrode height, thereby improving equipment efficiency and product processing quality.

[0011] To achieve the above objectives, this utility model provides an automatic tungsten electrode grinding and height calibration mechanism, comprising: a tungsten electrode positioning structure, an automatic grinding mechanism, and a height calibration mechanism. The automatic grinding mechanism includes: a tungsten electrode grinding head, with a grinding surface fixedly connected to the grinding point near the grinding point, so that the grinding surface contacts the tip of the corresponding tungsten electrode, and the grinding point of the corresponding tungsten electrode is ground by its rotational force. A left-right translation cylinder, whose telescopic arm pushes and pulls the tungsten electrode grinding head, and the telescopic arm can reciprocate along the x-axis. Furthermore, the tungsten electrode positioning structure includes: a positioning clamp, which clamps and moves the tungsten electrode to position the tip of the corresponding tungsten electrode at the grinding point. A displacement motor drives the positioning clamp to move along the x-axis to above the tungsten electrode grinding head, and controls the corresponding tungsten electrode to press down along the vertical z-axis until the tip of the tungsten electrode contacts the grinding surface of the tungsten electrode grinding head. The tungsten electrode positioning gripper has jaws at its front clamping end that can vertically clamp the slender tungsten electrode and position the tip of the tungsten electrode to contact the grinding surface of the tungsten electrode grinding head, thereby achieving the grinding of the tungsten electrode. The gripper positioning cylinder has a cylinder telescopic arm that is fixedly connected to the tungsten electrode positioning gripper.

[0012] As a preferred embodiment, the automatic polishing mechanism further includes: a motor connecting rod, the first end of which is fixed with a tungsten electrode polishing head, and the rod body is driven by the cylinder extension arm of the left and right translation cylinder, so that the left and right translation tungsten electrode polishing head passes the polishing point at the tip of the tungsten electrode.

[0013] As a preferred embodiment, the automatic grinding mechanism further includes a grinding head rotary motor, comprising a rotatable motor shaft and a motor that drives the motor shaft to rotate. The motor shaft is coaxially connected to the second end of a motor connecting rod, and the tungsten electrode grinding head is coaxially connected to the motor connecting rod, thereby causing the motor shaft to drive the tungsten electrode grinding head to rotate coaxially, and grinding the tip of the corresponding tungsten electrode through rotational force.

[0014] As a preferred embodiment, the tungsten electrode positioning gripper has a stepped limiting groove on its wrist. This groove limits the maximum distance the gripper can move in the x-direction, thereby fixing the tip of the corresponding tungsten electrode to the grinding surface of the tungsten electrode grinding head without deflection or bouncing. Furthermore, the tungsten electrode positioning gripper is an openable rigid clamp or caliper that can position the tungsten electrode.

[0015] In a preferred embodiment, the gripper positioning cylinder is parallel to the vertical plane, and the claw wrist of the tungsten electrode positioning gripper is fixedly connected to the gripper positioning cylinder via a linkage structure. The claw surface of the tungsten electrode positioning gripper is parallel to the horizontal plane, the front part of the claw surface is the jaw, and the claw wrist is fixed together with the pusher of the gripper positioning cylinder.

[0016] As a preferred embodiment, the automatic grinding mechanism further includes an inverted L-shaped right-angle fixing block, which comprises: a horizontal extension plate, the front end of which has a positioning through hole to limit the shaft position of the grinding head rotary motor and the motor connecting rod, and is rigidly connected and fixed together with the pusher blade driven by the cylinder telescopic arm of the left and right translation cylinders; and a vertical connecting plate, which is rigidly fixed to the pusher blade of the left and right translation cylinders by clamps or bolts, and the top surface of the vertical connecting plate intersects and is fixed together with the rear side of the horizontal extension plate.

[0017] As a preferred embodiment, the automatic grinding mechanism further includes: a limiting protective housing, nested outside the tungsten electrode grinding head, with a certain gap between it and the grinding head to avoid obstructing the grinding process, thereby protecting the grinding surface of the tungsten electrode grinding head and preventing excessive displacement and deflection of the motor connecting rod. Furthermore, the top of the limiting protective housing is provided with a tungsten limit positioning through hole to ensure the tungsten electrode remains vertical and does not deflect during grinding.

[0018] As a preferred embodiment, the automatic tungsten electrode grinding and height calibration mechanism of this utility model further includes a first dust collection mechanism. The limiting protective housing has a cylindrical structure and forms a sealed cavity, which includes only the dust collection port and the tungsten limit positioning through hole that is blocked after the tungsten electrode is inserted. The first dust collection mechanism includes a dust collection device, a dust collection pipe, and a shaft dust cover. The first end of the dust collection pipe is connected to the dust collection port, and the second end is connected to the dust collection pipe of the dust collection device. The shaft dust cover has an inverted bowl-shaped structure with a through hole at the bottom. This through hole is nested around the motor connecting rod connected to the tungsten electrode grinding head, and the tungsten electrode grinding head protrudes upward from the bottom of the bowl-shaped structure.

[0019] As a preferred embodiment, the height calibration mechanism includes a stepped limiting sleeve, wire drawing pliers, and a wire drawing pliers cylinder. A displacement motor drives the positioning pliers to clamp the corresponding tungsten electrode, horizontally moving the tip of the tungsten electrode to the jaws of the wire drawing pliers, and applying force to the tungsten electrode in a direction away from the wire drawing pliers to draw the wire. It also horizontally moves the tip of the corresponding tungsten electrode above the stepped limiting sleeve, pushing it into the stepped limiting sleeve along the vertical z-axis. The wire drawing pliers cylinder is electrically connected to the wire drawing pliers, controlling the positioning and opening / closing of the wire drawing pliers. The stepped limiting sleeve consists of an upper sleeve and a lower sleeve that are interconnected. The upper sleeve has a larger aperture than the lower sleeve, forming a stepped groove that is wider at the top and tighter at the bottom. Furthermore, the upper sleeve has a clearance fit with the corresponding tungsten electrode, while the lower sleeve has an interference fit, thereby limiting the length of the corresponding tungsten electrode pushed into the stepped limiting sleeve.

[0020] As a preferred embodiment, the height calibration mechanism further includes a second dust collection mechanism, comprising a dust collection device, a dust collection passage, and a dust collection housing. The dust collection housing encloses the dust collection passage and is a sealed cavity structure located between the top surface of the wire drawing pliers cylinder and the bottom surface of the wire drawing pliers. A dust collection hole is provided at the top of the dust collection housing, located below the wire drawing pliers. The dust collection passage connects the passageway of the sealed cavity structure below the wire drawing pliers to the piping of the dust collection device.

[0021] This utility model discloses an automatic grinding and height calibration mechanism for tungsten electrode welding. Firstly, it is an automated closed-loop control triggered by the number of welding operations. That is, the grinding process is automatically triggered by the statistics of the number of argon arc welding operations, which replaces the traditional manual inspection or reliance on visual inspection (such as camera inspection). This effectively avoids the introduction of complex visual monitoring systems and significantly reduces hardware costs. Furthermore, preventive maintenance is achieved by quantifying the number of welding operations, which greatly reduces the need for manual intervention.

[0022] Secondly, this invention employs an integrated automatic tungsten electrode grinding fixture design. This involves the linkage of a gripper positioning cylinder and a left-right translation cylinder to achieve both the fixing and grinding of the tungsten electrode. The grinding head rotation motor, in conjunction with the left-right translation cylinders, effectively ensures a smooth surface after grinding. In contrast, traditional manual grinding is prone to shape deviations. This invention significantly improves grinding efficiency and surface consistency, effectively avoiding uneven tungsten electrode wear caused by manual operation.

[0023] Thirdly, this utility model perfectly integrates the height calibration process and the tungsten electrode pulling process in the traditional process. After the wire drawing pliers clamp the wire drawing pliers, the servo motor of the wire drawing pliers cylinder moves upward by 4mm to accurately control the length of the tungsten electrode being pulled out. At the same time, the servo motor drives the tungsten electrode to be pressed down into the stepped limit sleeve at the fixed position of the tooling, so as to realize automatic height calibration, effectively eliminate manual calibration error, and greatly improve the welding accuracy and stability.

[0024] Fourth, this invention employs a dust removal process for tungsten electrode grinding and wire drawing. Both the automatic grinding mechanism and the height calibration mechanism are equipped with pipes to eliminate dust, covering the entire process of tungsten electrode grinding and wire drawing. Corresponding dust removal chambers and shaft dust covers are also provided to reduce dust overflow. Compared to traditional open grinding environments, this invention significantly improves the working environment, effectively solves the pollution problem of tungsten electrode grinding, and ensures that the tungsten electrode processing technology meets industrial safety and environmental protection requirements.

[0025] Fifth, this invention features multiple tungsten electrode positioning and anti-displacement designs, which not only firmly clamp and fix the tungsten electrode but also effectively prevent lateral displacement during grinding. Furthermore, the dust extraction system is linked to the grinding action, effectively preventing debris from interfering with positioning accuracy, thereby greatly ensuring the geometric accuracy of the tungsten electrode processing and extending the electrode's service life.

[0026] Compared with existing technologies, this invention realizes automatic grinding and height calibration of welding tungsten electrodes, effectively overcoming the problems of needing to manually check the electrode status, replace electrodes, and calibrate electrode height, thereby greatly improving equipment efficiency and product processing quality, which is extremely beneficial to product production and market promotion.

[0027] Therefore, this utility model has the following advantages over the prior art:

[0028] 1. This utility model achieves full automation of the tungsten electrode maintenance process, thereby improving production efficiency. From grinding triggering, positioning, dust removal to height calibration, this utility model achieves fully unmanned operation. With the addition of dual welding heads, downtime can be reduced to zero.

[0029] 2. This invention effectively improves the precision and consistency of tungsten electrode grinding. The invention employs coordinated control of cylinder lateral movement and a rotating grinding head, significantly reducing the surface flatness error of the tungsten electrode, thereby improving the consistency of tungsten electrode grinding and ultimately enhancing welding quality.

[0030] 3. This utility model effectively ensures the accuracy of height calibration, thereby improving the stability of welding quality. The calibration height repeatability of this utility model reaches ±0.02mm, which effectively improves the stability of the welding arc.

[0031] 4. This invention can significantly reduce maintenance costs and resource consumption. Through quantitative grinding, this invention effectively avoids excessive cutting of the tungsten electrode, thus eliminating the need for a visual inspection system and manual inspection.

[0032] 5. This invention improves the working environment and safety. Compared with traditional open-type operations, this invention improves the dust collection effect, and because the high-speed rotating parts are located inside the equipment, the safety door ensures effective isolation of personnel.

[0033] 6. This utility model has system compatibility and scalability. It can be adapted to various specifications of tungsten electrodes, and its parameters can be adjusted to meet the needs of different welding processes. Attached Figure Description

[0034] Figure 1 This is a perspective view of the tungsten electrode positioning structure and automatic polishing mechanism according to an embodiment of the present utility model.

[0035] Figure 2 This is a front perspective structural view of the height calibration mechanism according to an embodiment of the present utility model;

[0036] Figure 3 This is a side perspective view of the height calibration mechanism according to an embodiment of the present invention. Detailed Implementation

[0037] In the following description, embodiments of the oxygen sensor of this invention will be described with reference to the accompanying drawings.

[0038] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model, and are illustrative and exemplary, and should not be construed as limiting the embodiments or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include any obvious substitutions and modifications made to the embodiments described herein.

[0039] The accompanying drawings in this specification are schematic diagrams used to illustrate the concept of this utility model, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly show the structure of the various parts of the embodiments of the present invention, the drawings are not necessarily drawn to the same scale.

[0040] Figure 1 This is a perspective view of the tungsten electrode positioning structure and automatic grinding mechanism of this utility model.

[0041] This utility model discloses an automatic grinding and height calibration mechanism for welding tungsten electrodes, comprising: a tungsten electrode positioning structure, an automatic grinding mechanism, and a height calibration mechanism. Figure 1 As shown, the automatic polishing mechanism includes:

[0042] The tungsten electrode grinding head 11 is fixedly connected to the grinding surface of the tungsten electrode grinding head 11, which is fixed near the grinding point so that the grinding surface contacts the tip of the corresponding tungsten electrode and the grinding point of the corresponding tungsten electrode is ground by its rotational force.

[0043] A left-right translation cylinder 12 has a telescopic arm that pushes and pulls the tungsten electrode grinding head 11, and the telescopic arm can reciprocate along the x-axis. Furthermore, the tungsten electrode positioning structure includes:

[0044] The positioning clamp (not shown in the figure) holds the tungsten electrode and moves it so that the tip of the corresponding tungsten electrode is positioned at the point to be polished.

[0045] The displacement motor (not shown in the figure) drives the positioning clamp to move along the x-axis to above the tungsten electrode grinding head 11, and controls the corresponding tungsten electrode to press down along the vertical z-axis until the tip of the bottom of the tungsten electrode contacts the grinding surface of the tungsten electrode grinding head 11.

[0046] The tungsten electrode positioning jaw 21 has jaws 211 at its front clamping end that can vertically clamp the slender tungsten electrode and position the tip of the tungsten electrode to contact the grinding surface of the tungsten electrode grinding head 11, thereby achieving the grinding of the tungsten electrode.

[0047] The gripper positioning cylinder 22 has its cylinder telescopic arm fixedly connected to the tungsten electrode positioning gripper 21.

[0048] Specifically, the gripper positioning cylinder 22 and the tungsten electrode positioning gripper 21 can be connected to each other via, for example, a linkage structure 222. The tungsten electrode positioning gripper 21 can be composed of two carbide gripping arms, which achieve opposite translational motion through a four-bar linkage; the gripper positioning cylinder 22 drives the four-bar linkage to open and close through a double-acting piston, thereby driving the opening and closing of the carbide gripping arms of the tungsten electrode positioning gripper 21.

[0049] In a further preferred embodiment, the automatic polishing mechanism further includes a motor connecting rod 13, the first end of which is fixed with a tungsten electrode polishing head 11, and its rod body is driven by the cylinder extension arm 123 of the left and right translation cylinder, so that the left and right translation tungsten electrode polishing head 11 passes through the polishing point of the tungsten electrode tip.

[0050] In a further preferred embodiment, the automatic grinding mechanism further includes a grinding head rotary motor 14, comprising a rotatable motor shaft and a motor that drives the motor shaft to rotate. The motor shaft is coaxially connected to the second end of the motor connecting rod 13, and the tungsten electrode grinding head 11 is coaxially connected to the motor connecting rod 13, thereby causing the motor shaft to drive the tungsten electrode grinding head 11 to rotate coaxially, and grinding the tip of the corresponding tungsten electrode through rotational force.

[0051] In a further preferred embodiment, the tungsten electrode positioning gripper 21 has a stepped limiting groove 212 on its wrist 221. This stepped limiting groove 212 limits the maximum distance the tungsten electrode positioning gripper 21 can move in the x-direction, thereby fixing the tip of the corresponding tungsten electrode to the grinding surface of the tungsten electrode grinding head 11 by the tungsten electrode positioning gripper 21 without deflection or bounce. Furthermore, the tungsten electrode positioning gripper 21 is an openable and closable rigid clamp or caliper that can position the tungsten electrode.

[0052] In a further preferred embodiment, the gripper positioning cylinder 22 is parallel to the vertical plane, and the claw wrist 221 of the tungsten electrode positioning gripper 21 is fixedly connected to the gripper positioning cylinder 22 via a connecting rod structure 222. The claw surface of the tungsten electrode positioning gripper 21 is parallel to the horizontal plane, the front part of the claw surface is the jaw, and the claw wrist 221 is fixed together with the pusher of the gripper positioning cylinder 22.

[0053] In a further preferred embodiment, the automatic polishing mechanism further includes an inverted L-shaped right-angle fixing block 121, wherein the right-angle fixing block 121 comprises:

[0054] The horizontal extension plate has a positioning through hole 1211 on its front end to limit the shaft position of the grinding head rotary motor 14 and the motor connecting rod 13, and is rigidly connected and fixed together with the push shovel that is driven and connected to the cylinder telescopic arm 123 of the left and right translation cylinder.

[0055] The vertical connecting plate is rigidly fixed to the pusher 122 of the left and right translation cylinder by clamps or bolts, and the top surface of the vertical connecting plate intersects and is fixed together with the rear side of the horizontal extension plate.

[0056] In a further preferred embodiment, the automatic polishing mechanism further includes a limiting protective housing 31, nested outside the tungsten electrode polishing head 11, with a certain gap between it and the tungsten electrode polishing head 11, so as not to hinder the polishing of the tungsten electrode polishing head 11, to protect the polishing surface of the tungsten electrode polishing head 11, and to prevent excessive displacement and deflection of the motor connecting rod 13. Furthermore, the top of the limiting protective housing 31 is provided with a tungsten limit positioning through hole 311 to limit the tungsten electrode to remain vertical and prevent deflection during polishing.

[0057] In a further preferred embodiment, the automatic grinding and height calibration mechanism for the tungsten electrode welding of this utility model also includes a first dust extraction mechanism. The limiting protective housing 31 has a cylindrical structure and forms a sealed cavity, which includes only the dust extraction port 312 and the tungsten limit position through hole 311 that is blocked after the tungsten electrode is inserted.

[0058] The first dust collection mechanism includes a dust collection device (not shown in the figure), a dust collection pipe 41, and a shaft dust cover 42. The first end of the dust collection pipe 41 is connected to the dust collection port 312, and its second end is connected to the dust collection pipe 41 of the dust collection device. The shaft dust cover 42 is an inverted bowl-shaped structure with a through hole 421 at the bottom. This through hole 421 is nested around the motor connecting rod 13 connected to the tungsten electrode grinding head 11, and the tungsten electrode grinding head 11 extends upwards beyond the bottom of the bowl-shaped structure.

[0059] Figure 2 This is a front perspective structural view of the height calibration mechanism of this utility model. Figure 3 This is a side perspective view of the height calibration mechanism of this utility model.

[0060] This embodiment is further preferably preferred, such as Figure 2 and Figure 3 As shown, the height calibration mechanism includes a stepped limiting sleeve 51, wire drawing pliers 52, and wire drawing pliers cylinder 53.

[0061] A displacement motor (not shown in the figure) drives a positioning clamp (not shown in the figure) to hold the corresponding tungsten electrode, move the tip of the corresponding tungsten electrode horizontally to the jaws of the wire drawing pliers 52, and apply a force to the tungsten electrode in a direction away from the wire drawing pliers 52 to draw the wire. It also moves the tip of the corresponding tungsten electrode horizontally above the stepped limiting sleeve 51 and pushes it into the stepped limiting sleeve 51 along the vertical z-axis direction.

[0062] The wire drawing pliers cylinder 53 is electrically connected to the wire drawing pliers 52, controlling the positioning and opening / closing of the wire drawing pliers 52.

[0063] Specifically, the wire drawing pliers cylinder 53 and the wire drawing pliers 52 can be connected to each other via, for example, a linkage structure. The wire drawing pliers 52 can be composed of two carbide gripping arms with serrated patterns, which can achieve opposing translational motion through a four-bar linkage; the wire drawing pliers cylinder 53 drives the four-bar linkage to open and close through a double-acting piston, thereby driving the opening and closing of the carbide gripping arms of the wire drawing pliers 52.

[0064] The stepped limiting sleeve 51 consists of an upper sleeve and a lower sleeve that are interconnected. The upper sleeve has a larger aperture than the lower sleeve, forming a stepped groove that is wider at the top and tighter at the bottom. Furthermore, the upper sleeve has a clearance fit with the corresponding tungsten electrode, while the lower sleeve has an interference fit with the corresponding tungsten electrode, thereby limiting the length of the corresponding tungsten electrode that is pushed into the stepped limiting sleeve 51.

[0065] In a further preferred embodiment, the height calibration mechanism further includes a second dust collection mechanism, comprising a dust collection device, a dust collection passage 61, and a dust collection housing 62.

[0066] Furthermore, the dust collector housing 62 encloses the dust collection passage 61 and is a sealed cavity structure located between the top surface of the wire drawing pliers cylinder 53 and the bottom surface of the wire drawing pliers 52. A dust collection hole 621 is provided at the top of the dust collector housing 62, located below the wire drawing pliers 52. The dust collection passage 61 connects the passage of the sealed cavity structure below the wire drawing pliers 52 with the piping of the vacuuming equipment.

[0067] In a further preferred embodiment, the automatic tungsten electrode grinding and height calibration mechanism of this invention also includes a base assembly. This base assembly is formed by welding a vertical plate 71 and a horizontal base plate 72 together via triangular reinforcing ribs 73. The cylinder body of the left-right translation cylinder 12 is mounted on the vertical plate 71. The cylinder body of the gripper positioning cylinder 22 is fixed on the vertical plate 71 and is located above the left-right translation cylinder 12.

[0068] To overcome the problems existing in the prior art, this utility model provides a fully automated solution for tungsten electrode grinding and height calibration, avoiding manual inspection of electrode status, electrode replacement, and electrode height calibration, thereby improving equipment efficiency and quality. It adopts an automatic grinding method, that is, the equipment automatically grinds when the number of argon arc welding cycles reaches the alarm limit; and after grinding, it automatically performs calibration.

[0069] A set of tooling was designed, one for automatic tungsten electrode grinding and the other for automatic tungsten electrode height calibration. A left-right translation cylinder 12 moves the tungsten electrode grinding head 11 left and right to perform the grinding action. A gripper positioning cylinder 22 controls the tungsten electrode positioning gripper 21 to clamp the tungsten electrode, achieving positioning and ensuring the tungsten electrode's left-right position is fixed. During grinding, a vacuum dust removal device removes debris generated during the grinding process. Positioning clamps and wire-drawing clamps 52 respectively clamp the rear end and tip of the tungsten electrode, with the positioning clamp moving away from the wire-drawing clamps 52, pulling the ground tungsten electrode out a certain length. Then, a displacement motor moves the tungsten electrode above the stepped limiting sleeve 51 of the calibration plate, and then presses it down to push it into the stepped limiting sleeve 51 until it is fixed in position, thus adjusting the tungsten electrode to a certain height. A dust removal passage 61 is provided below the wire-drawing clamps 52 to avoid debris generated by relative friction between the wire-drawing clamps 52 and the tungsten electrode.

[0070] The functions of the main components of this utility model are as follows:

[0071] The positioning clamp and the moving motor (not shown in the figure) are used to control the movement of the tungsten electrode to the corresponding tooling position, and to work with other components to realize the tungsten electrode wire drawing process and height calibration process.

[0072] The tungsten electrode positioning jaw 21 is used to position the tungsten electrode to ensure that the position of the tungsten electrode is fixed during grinding.

[0073] The gripper positioning cylinder 22 is used to control the opening and closing of the tungsten electrode positioning gripper 21.

[0074] The tungsten electrode polishing head 11 contacts the tungsten electrode to perform polishing. The surface of the tungsten electrode polishing head 11 can be plated with a hard alloy layer to improve its durability.

[0075] The left and right translation cylinder 12 is used to drive the tungsten electrode polishing head 11 to move left and right, thereby ensuring that the tungsten electrode is flat after polishing.

[0076] The grinding head rotary motor 14 is used to drive the tungsten electrode grinding head 11 to rotate, thereby realizing the rapid grinding of the tungsten electrode.

[0077] The limiting protective housing 31 is used to ensure that as little dust as possible is emitted during grinding, and to ensure that the tungsten electrode grinding head 11 does not touch the worker during grinding.

[0078] The suction pipe 41 is connected to the suction equipment to remove the dust and fumes from the grinding process.

[0079] The stepped limiting sleeve 51 of the height calibration component is used to achieve height calibration after grinding.

[0080] The wire drawing pliers cylinder 53 is used to drive the wire drawing pliers 52 to open and close.

[0081] The dust removal passage 61 is connected to a dust collection device to remove metal debris generated during the wire drawing process;

[0082] The wire drawing pliers 52, together with the positioning pliers (not shown in the figure), work together to achieve the wire drawing of the tungsten electrode.

[0083] The workflow of this utility model is as follows:

[0084] 1) The positioning clamp (not shown in the figure) clamps the tungsten electrode, and the displacement motor (not shown in the figure) drives the tungsten electrode clamped in the positioning clamp to move above the tungsten electrode positioning jaw 21. Then the displacement motor drives the tungsten electrode clamped in the positioning clamp to push downward into the tungsten limit positioning through hole 311 of the limit protection housing 31, and moves downward until it touches the grinding surface of the tungsten electrode grinding head 11.

[0085] 2) The jaws 211 at the front clamping end of the tungsten electrode positioning claw 21 clamp the tungsten electrode, preventing it from moving left or right.

[0086] 3) When the vacuum cleaning equipment (not shown in the figure) is turned on, the grinding head rotary motor 14 drives the tungsten electrode grinding head 11 to rotate at high speed. The left and right translation cylinder 12 translates left and right three times, and drives the pusher 122 connected to the cylinder telescopic arm. The pusher 122 pushes and pulls the motor connecting rod 13, so that the motor connecting rod 13 drives the tungsten electrode grinding head 11 to translate left and right three times, removing foreign objects from the surface of the tungsten electrode and grinding the tip of the tungsten electrode flat.

[0087] 4) The grinding head rotary motor 14 stops rotating, the vacuum dust collection equipment stops, and the tungsten electrode positioning jaw 21 releases the tungsten electrode. At this time, the grinding process ends.

[0088] 5) The displacement motor drives the tungsten electrode clamped in the positioning clamp to move to the gap between the left and right clamps of the wire drawing pliers 52 above the cylinder 53. Then, the displacement motor drives the tungsten electrode clamped in the positioning clamp to move downward to the clamping position of the jaws of the wire drawing pliers 52.

[0089] 6) The cylinder 53 of the wire drawing pliers drives the left and right clamps to clamp by driving the left and right connecting rods. At this time, the tungsten electrode is tightly clamped between the left and right clamps of the wire drawing pliers 52.

[0090] 7) The vacuum cleaning equipment (not shown in the figure) is turned on, and dust is continuously absorbed through the dust removal passage 61.

[0091] 8) The displacement motor drives the tungsten electrode clamped in the positioning clamp to move upward by 4mm. At this time, because the tungsten electrode is clamped by the positioning clamp and the wire drawing pliers 52, and the positioning clamp moves away from the wire drawing pliers 52, the tungsten electrode is pulled out by the corresponding length.

[0092] 9) The wire drawing pliers 52 are released, and the vacuum cleaning equipment (not shown in the figure) stops. The displacement motor drives the tungsten electrode clamped in the positioning clamp to move upward and move it above the height calibration component.

[0093] 10) The displacement motor drives the tungsten electrode clamped in the positioning clamp to move above the stepped limiting sleeve 51. Then, the displacement motor drives the tungsten electrode clamped in the positioning clamp to press down, and the tungsten electrode is also pushed into the stepped limiting sleeve 51 to be fixed.

[0094] 11) After the grinding and calibration process is completed, the displacement motor is lifted, and the displacement motor drives the tungsten electrode clamped in the positioning clamp to the welding position (not shown in the figure), so as to carry out normal welding work.

[0095] In addition, in practical applications, dual welding heads and dual grinding and calibration fixtures can be equipped to ensure that while one tungsten electrode occupies one set of fixtures used for grinding and welding, the other set of fixtures can still be used normally, thus achieving zero downtime of the tungsten electrode processing production line.

[0096] This utility model discloses an automatic grinding and height calibration mechanism for tungsten electrode welding. Firstly, it is an automated closed-loop control triggered by the number of welding operations. That is, the grinding process is automatically triggered by the statistics of the number of argon arc welding operations, which replaces the traditional manual inspection or reliance on visual inspection (such as camera inspection). This effectively avoids the introduction of complex visual monitoring systems and significantly reduces hardware costs. Furthermore, preventive maintenance is achieved by quantifying the number of welding operations, which greatly reduces the need for manual intervention.

[0097] Secondly, this invention employs an integrated automatic tungsten electrode grinding fixture design. The tungsten electrode is fixed and ground through the linkage of the gripper positioning cylinder 22 and the left-right translation cylinder 12. The grinding head rotation motor 14, in conjunction with the left-right translation cylinder 12, effectively ensures a smooth surface after grinding. Compared to this invention, traditional manual grinding is prone to shape deviations. This invention significantly improves grinding efficiency and surface consistency, effectively avoiding uneven tungsten electrode wear caused by manual operation.

[0098] Thirdly, this utility model perfectly integrates the height calibration process and the tungsten electrode pulling process in the traditional process. After the wire drawing pliers 52 clamps the wire drawing pliers, the servo motor of the wire drawing pliers cylinder 53 moves upward by 4mm to accurately control the length of the tungsten electrode being pulled out. At the same time, the servo motor drives the tungsten electrode to be pressed down into the stepped limiting sleeve 51 at the fixed position of the tooling, so as to realize automatic height calibration, effectively eliminate manual calibration error, and greatly improve the welding accuracy and stability.

[0099] Fourth, this invention employs a dust removal process for tungsten electrode grinding and wire drawing. Both the automatic grinding mechanism and the height calibration mechanism are equipped with pipes to eliminate dust, covering the entire process of tungsten electrode grinding and wire drawing. This invention also includes a corresponding dust removal chamber and a shaft dust cover 42 to reduce dust overflow. Compared to traditional open grinding environments, this invention significantly improves the working environment, effectively solves the pollution problem of tungsten electrode grinding, and ensures that the tungsten electrode processing technology meets industrial safety and environmental protection requirements.

[0100] Fifth, this invention features multiple tungsten electrode positioning and anti-displacement designs, which not only firmly clamp and fix the tungsten electrode but also effectively prevent lateral displacement during grinding. Furthermore, the dust extraction system is linked to the grinding action, effectively preventing debris from interfering with positioning accuracy, thereby greatly ensuring the geometric accuracy of the tungsten electrode processing and extending the electrode's service life.

[0101] Compared with existing technologies, this invention realizes automatic grinding and height calibration of welding tungsten electrodes, effectively overcoming the problems of needing to manually check the electrode status, replace electrodes, and calibrate electrode height, thereby greatly improving equipment efficiency and product processing quality, which is extremely beneficial to product production and market promotion.

[0102] Therefore, this utility model has the following advantages over the prior art:

[0103] 1. This utility model achieves full automation of the tungsten electrode maintenance process, thereby improving production efficiency. From grinding triggering, positioning, dust removal to height calibration, this utility model achieves fully unmanned operation. With the addition of dual welding heads, downtime can be reduced to zero.

[0104] 2. This invention effectively improves the precision and consistency of tungsten electrode grinding. The invention employs coordinated control of cylinder lateral movement and a rotating grinding head, significantly reducing the surface flatness error of the tungsten electrode, thereby improving the consistency of tungsten electrode grinding and ultimately enhancing welding quality.

[0105] 3. This utility model effectively ensures the accuracy of height calibration, thereby improving the stability of welding quality. The calibration height repeatability of this utility model reaches ±0.02mm, which effectively improves the stability of the welding arc.

[0106] 4. This invention can significantly reduce maintenance costs and resource consumption. Through quantitative grinding, this invention effectively avoids excessive cutting of the tungsten electrode, thus eliminating the need for a visual inspection system and manual inspection.

[0107] 5. This invention improves the working environment and safety. Compared with traditional open-type operations, this invention improves the dust collection effect, and because the high-speed rotating parts are located inside the equipment, the safety door ensures effective isolation of personnel.

[0108] 6. This utility model has system compatibility and scalability. It can be adapted to various specifications of tungsten electrodes, and its parameters can be adjusted to meet the needs of different welding processes.

[0109] The embodiments of this utility model have been described above, with the aim of explaining the spirit of this utility model. Please note that those skilled in the art can modify and combine the features of the above embodiments without departing from the spirit of this utility model; therefore, this utility model is not limited to the above embodiments. Specific features such as shape, size, and position of the automatic tungsten electrode grinding and height calibration mechanism can be specifically designed based on the functions of the features disclosed above, and these designs are all achievable by those skilled in the art. Furthermore, the disclosed technical features are not limited to combinations with other features; those skilled in the art can also make other combinations of technical features according to the purpose of this utility model to achieve its objective.

Claims

1. An automatic grinding and height calibration mechanism for welding tungsten electrodes, characterized in that, include: The system includes a tungsten electrode positioning structure, an automatic polishing mechanism, and a height calibration mechanism; wherein the automatic polishing mechanism comprises: A tungsten electrode grinding head is fixedly connected to a grinding surface that is fixed near the grinding point, so that the grinding surface contacts the tip of the corresponding tungsten electrode, and the grinding point of the corresponding tungsten electrode is ground by its rotational force. A left-right translation cylinder, whose telescopic arm pushes and pulls the tungsten electrode grinding head, and the telescopic arm can reciprocate along the x-axis; and... The tungsten electrode positioning structure includes: Positioning clamps hold the tungsten electrode and move it so that the tip of the corresponding tungsten electrode is positioned at the point to be polished; The displacement motor drives the positioning clamp to move along the x-axis to above the tungsten electrode grinding head, and controls the corresponding tungsten electrode to press down along the vertical z-axis until the tip of the bottom of the tungsten electrode contacts the grinding surface of the tungsten electrode grinding head; The tungsten electrode positioning jaws have jaws at the front clamping end that can vertically clamp the slender tungsten electrode and position the tip of the tungsten electrode to contact the grinding surface of the tungsten electrode grinding head, thereby achieving the grinding of the tungsten electrode. A gripper positioning cylinder, wherein the cylinder extension arm is fixedly connected to the tungsten electrode positioning gripper.

2. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 1, characterized in that, The automatic polishing mechanism also includes: The motor connecting rod has the tungsten electrode grinding head fixed at its first end, and its body is driven by the cylinder extension arm of the left and right translation cylinder, which moves the tungsten electrode grinding head left and right past the grinding point of the tungsten electrode tip.

3. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 1, characterized in that, The automatic polishing mechanism also includes: A grinding head rotary motor includes a rotatable motor shaft and a motor that drives the motor shaft to rotate; The motor shaft is coaxially connected to the second end of the motor connecting rod, and the tungsten electrode grinding head is coaxially connected to the motor connecting rod, so that the motor shaft drives the tungsten electrode grinding head to rotate coaxially, and the tip of the corresponding tungsten electrode is ground by the rotational force.

4. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 1, characterized in that, The tungsten electrode positioning gripper has a stepped limiting groove on its wrist. This stepped limiting groove is used to limit the maximum distance the tungsten electrode positioning gripper can move in the x-direction, thereby fixing the tip of the corresponding tungsten electrode to the grinding surface of the tungsten electrode grinding head by the tungsten electrode positioning gripper without deflection or bounce. Furthermore, the tungsten electrode positioning gripper is an openable and closable rigid clamp or caliper that can position the tungsten electrode.

5. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 1, characterized in that, The gripper positioning cylinder is parallel to the vertical plane, and the claw wrist of the tungsten electrode positioning gripper is fixedly connected to the gripper positioning cylinder through a connecting rod structure. The claw surface of the tungsten electrode positioning gripper is parallel to the horizontal plane, the front part of the claw surface is the jaw, and the claw wrist is fixed together with the pusher of the gripper positioning cylinder.

6. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 3, characterized in that, The automatic polishing mechanism also includes an inverted L-shaped right-angle fixing block, wherein... The right-angle fixing block includes: The horizontal extension plate has a positioning through hole on its front end to limit the shaft position of the grinding head rotary motor and the motor connecting rod, and is rigidly connected and fixed together with the push shovel driven by the cylinder telescopic arm of the left and right translation cylinder. The vertical connecting plate is rigidly fixed to the pusher of the left and right translation cylinder by clamps or bolts, and the top surface of the vertical connecting plate intersects and is fixed together with the tail side of the horizontal extension plate.

7. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 1, characterized in that, The automatic polishing mechanism also includes: A limiting protective housing is nested outside the tungsten electrode grinding head, with a certain gap between it and the grinding head to avoid obstructing grinding. This protects the grinding surface of the tungsten electrode grinding head and prevents excessive displacement and deflection of the motor connecting rod. The top of the limiting protective housing is provided with a tungsten limit through hole to limit the tungsten electrode to remain vertical and prevent it from deflecting during grinding.

8. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 7, characterized in that, It also includes a first dust collection mechanism; wherein the limiting protective housing is a cylindrical structure and forms a sealed cavity, the sealed cavity including only the dust collection port and the tungsten limit position through hole that is blocked after the tungsten electrode is inserted; The first dust collection mechanism includes a dust collection device, a dust collection pipe, and a shaft dust cover; Furthermore, the first end of the suction pipe is connected to the suction port, and its second end is connected to the suction pipe of the vacuuming device; The dust cover of the shaft is an inverted bowl-shaped structure with a through hole at the bottom. The through hole is nested around the motor connecting rod connected to the tungsten electrode grinding head, and the tungsten electrode grinding head extends upward out of the bottom of the bowl-shaped structure.

9. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 1, characterized in that, The height calibration mechanism includes a stepped limiting sleeve, wire drawing pliers, and a wire drawing pliers cylinder; The displacement motor drives the positioning clamp to hold the corresponding tungsten electrode, moves the tip of the corresponding tungsten electrode horizontally to the jaws of the wire drawing pliers, and applies a force to the tungsten electrode in the direction away from the wire drawing pliers to draw the wire. And it moves the tip of the corresponding tungsten electrode horizontally above the stepped limiting sleeve and pushes it into the stepped limiting sleeve along the vertical z-axis direction; The wire drawing pliers cylinder is electrically connected to the wire drawing pliers and controls the positioning and opening / closing of the wire drawing pliers; The stepped limiting sleeve is divided into an upper sleeve and a lower sleeve that are interconnected, wherein, The upper sleeve has a larger aperture than the lower sleeve, forming a stepped groove that is wider at the top and tighter at the bottom; and... The upper sleeve is clearance-fitted with the corresponding tungsten electrode, and the lower sleeve is interference-fitted with the corresponding tungsten electrode, thereby limiting the length of the corresponding tungsten electrode that is pushed into the stepped limiting sleeve.

10. The automatic grinding and height calibration mechanism for welding tungsten electrodes according to claim 9, characterized in that, The height calibration mechanism also includes: The second dust collection mechanism includes a dust collection device, a dust collection passage, and a dust collection housing; and... The dust removal housing encloses the dust removal passage and is a sealed cavity structure located between the top surface of the wire drawing pliers cylinder and the bottom surface of the wire drawing pliers; wherein, The top of the dust removal housing is provided with a dust removal hole, which is located below the wire drawing pliers; The dust removal passage connects the passage of the sealed cavity structure below the wire drawing pliers and the pipeline of the dust collection equipment.

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