Resistance welding electrode grinding device

Abstract

A new type of resistance welding electrode grinder includes: a locking device, the locking device has a locking hole that is coaxial with the electrode and can adjust the diameter; a rotary drive device; a grinding head, the grinding head is used to be installed on the drive shaft and can rotate with the drive shaft; a pressure control handle, the pressure control handle is a lever-type structure, the pressure control handle is connected to the rotary drive device and is used to control the axial movement of the rotary drive device along the locking hole. The present invention performs mechanized motion limiting on the rotary drive device so that it can only move in a specific linear direction, thereby minimizing the shaking of the grinding head during the filing process and greatly improving the filing quality of the electrode; because the stability of the grinding head is improved, the flatness of the electrode end surface can be guaranteed, and the welding quality is guaranteed when welding nuts and screws. In electric welding, the integrity of the round core of the spot welding nugget diameter is also guaranteed, and the welding quality requirements are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of welding electrode repairing equipment, and more specifically, to a resistance welding electrode dresser. Background Art

[0002] In the current automotive manufacturing industry, manually operated resistance spot welding / spot welding machines still occupy a large market share. With the improvement of manufacturing quality requirements and process requirements, in order to ensure the quality of resistance welding points, higher requirements are also put forward for the filing of electrode tips.

[0003] At present, the filing of electrode heads is generally achieved by using a handheld electrode grinder, which can ensure the quality of the grinding and improve the efficiency of the filing. The handheld electrode grinders currently on the market are all single-handle structures. Since they are operated with one hand, the handheld electrode grinder cannot maintain good stability and balance during operation, and thus cannot ensure the concentricity and flatness of the electrode grinding end face. The filed electrode may also have problems such as cold welding of the weld spot and the diameter of the weld core failing to meet the requirements. In addition, the filing operation of the handheld electrode grinder with one hand is relatively laborious due to the lack of a power-assisting mechanism.

[0004] Therefore, how to provide a new manual electrode dresser that can improve the stability and balance of electrode dressing operation and is more labor-saving to use has become a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The invention provides a resistance welding electrode dresser for filing an electrode.

[0007] In the present invention, the resistance welding electrode dresser comprises:

[0008] A locking device, wherein the locking device has a locking hole coaxial with the electrode and with an adjustable diameter, and the locking hole is used for assembling and fixing the electrode;

[0009] A rotary drive device, the rotary drive device comprising a drive shaft, the drive shaft being coaxially arranged with the locking hole;

[0010] A grinding head, the grinding head is used to be installed on the drive shaft and can rotate with the drive shaft, a grinding knife is arranged on the side of the grinding head facing the locking hole, a surface formed by rotating around the axis of the drive shaft with the blade of the grinding knife as the generatrix is ​​the grinding surface, and the grinding surface is coaxially arranged with the locking hole;

[0011] A pressure control handle, wherein the pressure control handle is a lever-type structure, and the pressure control handle is connected to the rotary drive device and is used to control the axial movement of the rotary drive device along the locking hole.

[0012] Preferably, the resistance welding electrode grinder provided by the present invention further includes a connecting seat, on which the pressure control handle, the rotary drive device, the grinding head and the locking device are sequentially arranged from top to bottom; the grinding surface formed by the grinding head and the locking hole are spaced apart to form a grinding operation space for installing the electrode.

[0013] Preferably, in the resistance welding electrode dresser provided by the present invention, a connecting rod is provided on the connecting seat and is coaxially arranged with the locking hole. The connecting rod can move axially along the locking hole. The upper end of the connecting rod is dynamically connected to the pressure control handle for transmitting the grinding downward pressure applied by the pressure control handle, and the lower end of the connecting rod is connected to the rotation drive device for driving the rotation drive device to move up and down.

[0014] Preferably, in the resistance welding electrode dresser provided by the present invention, a limiting hole is provided on the connecting seat, and the connecting rod is slidably disposed in the limiting hole.

[0015] Preferably, in the resistance welding electrode dresser provided by the present invention, there are at least two limit holes, and the limit holes are spaced apart; a pressure ring structure is provided on the connecting rod, and the pressure ring structure can be movably provided between two adjacent limit holes; a reset spring for applying an upward reset force to the connecting rod is provided on the connecting rod and between the pressure ring structure and the limit holes.

[0016] Preferably, in the resistance welding electrode dresser provided by the present invention, one end of the pressure control handle is a hinged end for being hinged to the connecting seat, and the other end of the pressure control handle is a hand-held end, and a pressure transmission structure is provided at a position of the pressure control handle close to its hinged end, the lower side surface of the pressure transmission structure is a smooth curved surface, the upper end surface of the connecting rod is a plane, and the lower side surface of the pressure transmission structure slides against the upper end surface of the connecting rod.

[0017] Preferably, in the resistance welding electrode dresser provided by the present invention, the rotation drive device is an electric motor, a hydraulic motor or a pneumatic motor.

[0018] Preferably, in the resistance welding electrode dresser provided by the present invention, the dresser head is detachably disposed on the driving shaft.

[0019] Preferably, in the resistance welding electrode dresser provided by the present invention, the connecting seat is made of metal and is an integrated structure; the pressure control handle is made of metal and is an integrated structure.

[0020] Preferably, in the resistance welding electrode dresser provided by the present invention, the locking device is a multi-jaw chuck.

[0021] The beneficial effects of the present invention are as follows:

[0022] The invention provides a resistance welding electrode dresser, which is used for filing an electrode. The resistance welding electrode dresser comprises: a locking device, which has a locking hole which is coaxial with the electrode and has an adjustable diameter, and is used for assembling and fixing the electrode; a rotary drive device, which comprises a driving shaft, and the driving shaft is coaxially arranged with the locking hole; a grinding cutter head, which is used for being installed on the driving shaft and can rotate with the driving shaft, and a grinding cutter is arranged on the side of the grinding cutter head facing the locking hole, and a surface formed by rotating around the axis of the driving shaft with the blade of the grinding cutter as a generatrix is ​​a grinding surface, and the grinding surface is coaxially arranged with the locking hole; and a pressure control handle, which is a lever-type structure, is connected to the rotary drive device and is used for controlling the axial movement of the rotary drive device along the locking hole.

[0023] Through the above structural design, the resistance welding electrode grinder provided by the present invention has at least the following beneficial effects: 1. The grinding head is driven by a rotary drive device to file the electrode, and the grinding speed is fast, which can reduce the grinding time cost; 2. The rotary drive device is mechanized to limit the movement so that it can only move in a specific linear direction, and the pressure control handle is controlled to press down to complete the filing operation, which is not only simple to operate, but also can minimize the shaking of the grinding head during the filing process, greatly improving the filing quality of the electrode; 3. The stability of the grinding cutter head is improved, so the flatness of the electrode end face can be guaranteed, and the welding quality is guaranteed when welding nuts and screws; 4. Under the premise that the coaxiality of the resistance spot welding electrode end face can be guaranteed, the integrity of the spot welding molten core diameter is guaranteed, and the welding quality requirements are guaranteed; 5. The locking device is used to fix the electrode (upper electrode and lower electrode) to ensure the coaxiality between the electrodes during processing. In this way, after the electrode is ground, the flatness and coaxiality of the upper and lower electrode end faces can be guaranteed to be consistent, so that poor quality such as cold welding and too small weld core diameter will not be caused to the weld point. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0025] Figure 1 An exploded view of a resistance welding electrode dresser in one embodiment of the present invention;

[0026] Figure 2 An exploded view of a grinding tool head in one embodiment of the present invention;

[0027] Figure 3 for Figure 2 Illustration after changing the angle;

[0028] Figure 4 An exploded view of a grinding tool head in another embodiment of the present invention;

[0029] Figure 5 for Figure 4 Illustration after changing the angle.

[0030] exist Figures 1 to 5 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0031] Locking device 1, rotating drive device 2, pressure control handle 3, connecting seat 4, connecting rod 5,

[0032] Limiting hole 6, return spring 7, grinding head 8, head body 81, grinding knife 82,

[0033] Chuck body 9 , chuck window 10 , clamping claws 11 , and chuck sleeve 12 . DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0035] Please refer to Figures 1 to 5 ,in, Figure 1 An exploded view of a resistance welding electrode dresser in one embodiment of the present invention; Figure 2 An exploded view of a grinding tool head in one embodiment of the present invention; Figure 3 for Figure 2 Illustration after changing the angle; Figure 4 An exploded view of a grinding tool head in another embodiment of the present invention; Figure 5 for Figure 4 Illustration after changing the angle.

[0036] The invention provides a resistance welding electrode dresser for filing an electrode.

[0037] In the present invention, the resistance welding electrode dresser comprises the following components:

[0038] 1. Locking device 1.

[0039] The locking device 1 is a component for realizing directional fixation of the electrode in the present invention (fixing the electrode in the vertical direction in the present invention). The locking device 1 has a locking hole coaxial with the electrode and with an adjustable diameter. The locking hole is used for assembling and fixing the electrode. The electrode is inserted into the locking hole, and then the size of the locking hole is adjusted so that the hole wall of the locking hole hugs the electrode, thereby fixing the electrode.

[0040] In the present invention, the locking device 1 is a multi-jaw chuck, which includes a chuck body 9 . The chuck body 9 is a cylindrical structure, and the electrode can be inserted into the chuck body 9 . The lower section of the chuck body 9 adopts a conical structure (the diameter of the lower section of the chuck body 9 gradually decreases from top to bottom), and a chuck window 10 is provided in the lower section of the chuck body 9 (at least three chuck windows 10 are provided and are equally spaced around the circumference of the chuck body 9), and a clamping claw 11 is provided in the chuck body 9 (one clamping claw 11 is provided corresponding to each chuck window 10), and the inner side surface of the clamping claw 11 is located in the chuck body 9, and is used to contact with the electrode to clamp and fix the electrode, and the outer side surface of the clamping claw 11 is exposed to the outside through the chuck window 10, and a chuck sleeve 12 is provided on the outer side of the chuck body 9, and the chuck sleeve 12 is threadedly matched with the outer side surface of the clamping claw 11. When the chuck sleeve 12 is rotated to make it move upward, the clamping claws 11 can be closed to clamp and fix the electrode, and when the chuck sleeve 12 is rotated to make it move downward, the clamping claws 11 can be separated and expanded, thereby loosening and releasing the electrode.

[0041] Before clamping and fixing the electrode, separate the multiple claws of the chuck, enlarge the aperture of the locking hole, and then vertically place the electrode in the locking hole (i.e., in the middle of the multiple claws of the chuck), and then adjust the chuck so that the claws are tightened and in contact with the electrode to fix the electrode. Since the claws on the chuck move synchronously, the electrode can be stably clamped.

[0042] 2. Rotation drive device 2.

[0043] The present invention achieves filing of the electrode end surface by driving the grinding head 8 to rotate. The rotary drive device 2 provided by the present invention is a power device capable of outputting rotational motion and torque, and is used to drive the rotation of the grinding head 8. The rotary drive device 2 includes a drive shaft, and the drive shaft is coaxially arranged with the locking hole. Preferably, the rotary drive device 2 can be an electric motor, a hydraulic motor or a pneumatic motor.

[0044] Taking the rotary drive device 2 as an electric motor as an example, the rotary drive device 2 includes a motor body, a motor rotor is installed on the motor body, and a motor shaft (i.e., a drive shaft) is arranged on the motor rotor. When the rotary drive device 2 is installed, the axial direction of the motor shaft should always be coaxial with the hole axis of the locking hole.

[0045] 3. Grind the cutter head 8.

[0046] The grinding head 8 is used to contact the electrode so as to file the end face of the electrode. The grinding head 8 is used to be installed on the drive shaft and can rotate with the drive shaft. The grinding head 8 is provided with a grinding knife 82 on the side facing the locking hole. The surface formed by rotating around the axis of the drive shaft with the blade of the grinding knife 82 as the generatrix is ​​the grinding surface. The grinding surface is coaxially arranged with the locking hole.

[0047] For electrodes, the shape of their end faces (the faces where the upper electrode and the lower electrode face each other, that is, the end faces used to achieve electric welding) can be roughly divided into two categories, one is a flat end face, and the other is a raised end face. The raised end face can be divided into conical faces and spherical faces. Electrodes generally adopt a cylindrical structure with an electrode axis. The electrode axis is a virtual straight line passing through the centroid of the electrode end face. For electrodes of the second structural form, there is an electrode end face generatrix (a virtual line) extending radially from the centroid of the electrode end face in the form of a smooth curve. The end face of the electrode is formed by rotating the electrode end face generatrix around the centroid of the electrode.

[0048] In the present invention, the grinding head 8 can be installed on the rotary drive device 2 (the rotary drive device 2 outputs the rotary motion and torque), and the rotary drive device 2 drives the grinding head 8 to rotate, thereby grinding the electrode end surface. In the present invention, the grinding head 8 adopts a split structure, including a head body 81 and a grinding knife 82. The head body 81 is used to fix the grinding knife 82, and can also be fixedly installed on the rotary drive device 2.

[0049] In a specific embodiment of the present invention, the cutter head body 81 is similar to a cylindrical structure as a whole, which can improve the rotation stability of the grinding cutter head 8 during the grinding process. Of course, the cutter head body 81 can also adopt other regular cylindrical structures, such as a regular polygonal prism. The cutter head body 81 is preferably implemented in a cylindrical structure. The cutter head body 81 has an axis (a virtual straight line), and the cutter head body 81 can rotate around its axis under the drive of the rotary drive device 2. Along the axial direction of the cutter head body 81, the upper end surface (i.e., the top surface) of the cutter head body 81 is provided with a power hole for connecting to the drive shaft of the rotary drive device 2, and the lower end surface (i.e., the bottom surface) of the cutter head body 81 is provided with a mounting groove, which is used to fix and install the grinding cutter 82. Among them, the power hole is a circular hole or a square hole, and the power hole is preferably a square hole, and can also be a triangular hole (or a polygonal prism hole structure). The cutter head body 81 can be assembled to the drive shaft of the rotary drive device 2 through the power hole, which can be a key connection relationship or a threaded connection relationship. The cutter head body 81 is provided with mounting grooves for mounting the grinding cutter 82. There are at least two mounting grooves (in a preferred embodiment of the present invention, three mounting grooves are provided). All the mounting grooves are arranged at equal intervals around the rotation drive axis of the cutter head body 81. In this way, when the grinding cutter 82 is grinding the electrode, the grinding cutter 82 is subjected to balanced force, which can improve the rotation stability of the entire grinding cutter head 8, thereby achieving the purpose of improving the electrode grinding quality.

[0050] For the grinding knife 82, in order to facilitate the description of its structure, the present invention divides the grinding knife 82 into two parts, that is, the grinding knife 82 includes a mounting body and a blade body, the mounting body is designed according to the shape of the mounting groove, the mounting body can be assembled into the mounting groove, and is used to fix the grinding knife 82 on the cutter head body 81, and the blade body is provided with a blade, which is protruding relative to the outer surface of the cutter head body 81, so that the end face of the electrode can be ground. The blade is provided on the blade body, and when the grinding knife 82 is in a rotating state, the blade realizes the grinding of the electrode end face by contacting with the electrode end face.

[0051] Specifically, the blade rotates around the rotation drive axis of the cutter head body 81 to form a grinding surface, and the grinding surface matches the shape of the end face of the electrode after grinding, that is, the shape of the grinding surface is consistent with the shape of the rear end face of the electrode after grinding in an ideal state. A grinding knife 82 is arranged in each mounting groove, and a plurality of grinding knives 82 are arranged. The rotation of the blade of each grinding knife 82 can form a grinding surface, and the grinding surfaces formed by the blades of all grinding knives 82 overlap.

[0052] 4. Pressure control handle3.

[0053] The main function of the pressure control handle 3 is to transmit the force (pressure applied by the operator) and control the rotary drive device 2 to press down to complete the filing of the electrode.

[0054] In the present invention, the pressure control handle 3 is a lever-type structure, which is connected to the rotation drive device 2 and is used to control the axial movement of the rotation drive device 2 along the locking hole. It should be noted that during the movement of the rotation drive device 2, the axis of its drive shaft always remains coaxial with the axis of the locking hole.

[0055] The pressure control handle 3 can control the action (downward movement) of the rotary drive device 2. The connection structure between the pressure control handle 3 and the rotary drive device 2 is as follows:

[0056] The present invention is provided with a connecting seat 4, which is a structural component with a certain height and high structural strength, and its main function is to realize the installation of other components in the present invention. Specifically, from top to bottom, the pressure control handle 3 (hinged on the connecting seat 4), the rotation drive device 2 (mounted on the connecting seat 4 so as to be movable up and down), the grinding head 8 (mounted on the rotation drive device 2 and also capable of moving up and down relative to the connecting seat 4) and the locking device 1 (fixedly arranged on the connecting seat 4) are arranged in sequence, and the grinding surface formed by the grinding head 8 and the locking hole are arranged at intervals and a grinding operation space for installing the electrode is formed. Further, a connecting rod 5 is arranged coaxially with the locking hole on the connecting seat 4, and the connecting rod 5 is a long straight rod, preferably a round rod. The connecting rod 5 can move along the axial direction of the locking hole, and the upper end of the connecting rod 5 is dynamically connected to the pressure control handle 3, and is used to transmit the grinding downward pressure applied by the pressure control handle 3, and the lower end of the connecting rod 5 is connected to the rotation drive device 2, and is used to drive the rotation drive device 2 to move up and down. Specifically, the present invention horizontally arranges two limit plates on the connecting seat 4, and sets limit holes 6 on the limit plates. There are two limit holes 6, and there is a certain gap in height between the two limit holes 6. The connecting rod 5 can be slidably arranged in the limit holes 6, and the limit holes 6 limit the up and down movement of the connecting rod 5, so that the movement of the connecting rod 5 always maintains a coaxial structure with the locking hole.

[0057] As can be seen from the above, the present invention uses a pressure control handle 3 to press down the connecting rod 5 together with the rotary drive device 2. In order to achieve the upward reset of the rotary drive device 2, the present invention provides a reset spring 7 on the basis of the connecting rod 5. Specifically, at least two (preferably two in the present invention) limiting holes 6 are provided, and the limiting holes 6 are arranged at intervals. A pressure ring structure (the diameter of the pressure ring structure is greater than the diameter of the connecting rod 5) is provided on the connecting rod 5. The pressure ring structure is fixed relative to the connecting rod 5 and can move up and down with the connecting rod 5. By designing the position of the pressure ring structure on the connecting rod 5, the pressure ring structure can be movably arranged between two adjacent limiting holes 6. A reset spring 7 for applying an upward reset force to the connecting rod 5 is provided on the connecting rod 5 and between the pressure ring structure and the limiting hole 6. The pressure control handle 3 applies pressure (after the pressure overcomes the elastic force of the reset spring 7, the rotary drive device 2 can be pressed down through the connecting rod 5) to press the rotary drive device 2 down to file the electrode. After the filing is completed, the force on the pressure control handle 3 is cancelled, and the connecting rod 5 can drive the rotary drive device 2 to move upward and reset to overcome gravity under the action of the reset spring 7. The pressure control handle 3 and the connecting rod 5 can be connected by setting a transition rod, and the two ends of the transition rod are respectively hinged to the pressure control handle 3 and the connecting rod 5, so that when the pressure control handle 3 is pressed down, the connecting rod 5 can only move up and down. In other preferred embodiments of the present invention, the following structural design is adopted: one end of the pressure control handle 3 is a hinged end for hinged connection with the connecting seat 4, and the other end of the pressure control handle 3 is a handheld end. A pressure transmission structure is provided at a position near the hinged end of the pressure control handle 3, the lower side of the pressure transmission structure is a smooth curved surface, and the upper end face of the connecting rod 5 is a plane. The lower side of the pressure transmission structure slides against the upper end face of the connecting rod 5.

[0058] Specifically, the connecting seat 4 is made of metal, and the connecting seat 4 is an integrated structure; the pressure control handle 3 is made of metal, and the pressure control handle 3 is an integrated structure.

[0059] The present invention provides a resistance welding electrode dresser, which is used for filing an electrode. The resistance welding electrode dresser comprises: a locking device 1, which has a locking hole which is coaxial with the electrode and has an adjustable diameter, and is used for assembling and fixing the electrode; a rotating drive device 2, which comprises a driving shaft, and the driving shaft is coaxially arranged with the locking hole; a grinding head 8, which is used for being installed on the driving shaft and can rotate with the driving shaft, and a grinding knife 82 is arranged on the side of the grinding head 8 facing the locking hole, and a surface formed by rotating around the axis of the driving shaft with the blade of the grinding knife 82 as a generatrix is ​​a grinding surface, and the grinding surface is coaxially arranged with the locking hole; a pressure control handle 3, which is a lever-type structure, is connected to the rotating drive device 2 and is used for controlling the axial movement of the rotating drive device 2 along the locking hole.

[0060] The resistance welding electrode grinder provided by the present invention aims to overcome the problems existing in existing manual electrode grinders, such as the inability to maintain good stability and balance during electrode filing operation. The use of the present invention can not only ensure the stability and balance of the operation, but also ensure the flatness and coaxiality of the electrode end surface, and its use is also very labor-saving.

[0061] The use operation steps of the present invention are as follows:

[0062] Step 1: Fix the electrode grinder. The electrode grinder can be fixed on the work surface or directly fixed on the electrode by adjusting the claws;

[0063] Step 2: The electrode to be ground is locked and fixed by means of the claws;

[0064] Step 3: Start the rotation drive device 2 (i.e., the motor) to rotate, and the rotation drive device 2 drives the grinding head 8 to rotate;

[0065] Step 4: manually press down the pressure control handle 3, the grinding head 8 contacts the electrode and starts to grind the electrode;

[0066] Step 5: When the electrode end surface is smooth and flat, the original oxide layer is ground clean and then stop grinding.

[0067] Through the above structural design, the resistance welding electrode grinder provided by the present invention has at least the following beneficial effects: 1. The rotary drive device 2 is used to drive the grinding head 8 to file the electrode, and the grinding speed is fast, which can reduce the grinding time cost; 2. The rotary drive device 2 is mechanized to limit the movement so that it can only move in a specific linear direction, and the pressure control handle 3 is used to control the downward pressure to complete the filing operation. It is not only simple to operate, but also can minimize the shaking of the grinding head 8 during the filing process, and greatly improve the filing quality of the electrode; 3. Since the stability of the grinding cutter head 8 is improved, the flatness of the electrode end face can be guaranteed, and the welding quality is guaranteed when welding nuts and screws; 4. Under the premise that the coaxiality of the resistance spot welding electrode end face can be guaranteed, the integrity of the spot welding nugget diameter round core is guaranteed, and the welding quality requirements are guaranteed; 5. The locking device is used to fix the electrode (upper electrode and lower electrode) to ensure the coaxiality between the electrodes during processing. In this way, after the electrode is ground, the flatness and coaxiality of the upper and lower electrode end faces can be guaranteed to be consistent, so that poor quality such as cold welding and too small weld core diameter will not be caused to the weld point.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A resistance welding electrode dresser for filing an electrode, characterized in that: include: A locking device, wherein the locking device has a locking hole coaxial with the electrode and with an adjustable diameter, and the locking hole is used for assembling and fixing the electrode; A rotary drive device, the rotary drive device comprising a drive shaft, the drive shaft being coaxially arranged with the locking hole; A grinding head, the grinding head is used to be installed on the drive shaft and can rotate with the drive shaft, a grinding knife is arranged on the side of the grinding head facing the locking hole, a surface formed by rotating around the axis of the drive shaft with the blade of the grinding knife as the generatrix is ​​the grinding surface, and the grinding surface is coaxially arranged with the locking hole; A pressure control handle, wherein the pressure control handle is a lever-type structure, the pressure control handle is connected to the rotary drive device and is used to control the axial movement of the rotary drive device along the locking hole; It also includes a connecting seat, on which the pressure control handle, the rotary drive device, the grinding head and the locking device are arranged in sequence from top to bottom; A grinding operation space for installing an electrode is formed between the grinding surface formed by the grinding head and the locking hole; A connecting rod is provided on the connecting seat and is coaxial with the locking hole. The connecting rod can move along the axial direction of the locking hole. The upper end of the connecting rod is dynamically connected to the pressure control handle and is used to transmit the grinding downward pressure applied by the pressure control handle. The lower end of the connecting rod is connected to the rotation driving device and is used to drive the rotation driving device to move up and down. One end of the pressure control handle is a hinged end for hinged connection with the connecting seat, and the other end of the pressure control handle is a hand-held end. A pressure transmission structure is arranged at a position of the pressure control handle near its hinged end. The lower side surface of the pressure transmission structure is a smooth curved surface, and the upper end surface of the connecting rod is a plane. The lower side surface of the pressure transmission structure slides against the upper end surface of the connecting rod.

2. The resistance welding electrode dresser according to claim 1, characterized in that: A limiting hole is arranged on the connecting seat, and the connecting rod is slidably arranged in the limiting hole.

3. The resistance welding electrode dresser according to claim 2, characterized in that: There are at least two limiting holes, and the limiting holes are spaced apart from each other; A pressure ring structure is arranged on the connecting rod, and the pressure ring structure can be movably arranged between two adjacent limiting holes. A return spring for applying an upward return force to the connecting rod is arranged on the connecting rod and between the pressure ring structure and the limiting holes.

4. The resistance welding electrode dresser according to claim 1, characterized in that: The rotary drive device is an electric motor, a hydraulic motor or a pneumatic motor.

5. The resistance welding electrode dresser according to claim 1, characterized in that: The grinding tool head is detachably arranged on the driving shaft.

6. The resistance welding electrode dresser according to claim 1, characterized in that: The connecting seat is made of metal and is an integrated structure; The pressure control handle is made of metal and is an integrated structure.

7. The resistance welding electrode dresser according to any one of claims 1 to 6, characterized in that: The locking device is a multi-jaw chuck.

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