Dresser and dressing method for dressing a welding electrode having a protrusion of a double helix structure

Abstract

A dresser and method for dressing a projection welding electrode having a double helix structure are provided. According to the dresser and dressing method for a projection welding electrode having a double helix structure of the present invention, the cutting cutter of the present invention can simultaneously cut and restore the geometric shape of the welding surface of the double helix structure welding electrode that has experienced various aging deterioration mechanisms, and can be more accurate and rapid, and can maintain high welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of dressing devices for welding electrodes with a double helix structure, and particularly to a dresser and a dressing method for dressing welding electrodes with a double helix structure. Having a protrusion

Background Art

[0002] Resistance spot welding is a method of joining two or more stacked workpieces by applying pressure and current through electrode contact, generating heat using the resistance between the workpieces to melt the material. In the current production of steel vehicle bodies in automobile manufacturing, this method occupies the main manufacturing process. In order to reduce manufacturing costs and expand the usage amount and range of aluminum alloys, welding electrodes with high welding strength, long service life, and easy popularity are required. However, welding electrodes with a double helix structure on the welding end face have drawbacks such as low joining strength, intense spattering, and large current values, and cannot fully overcome the drawbacks of spot welding of aluminum alloys.

[0003] However, currently, there is no rapid and effective dresser for welding electrodes with a double helix structure. In this field, there is an urgent need for a cutting cutter for dressing the surface of the electrode and its usage method that can effectively solve the above problems.

Summary of the Invention

[0004] Therefore, in order to solve the problem that there is currently no rapid and effective dresser for welding electrodes with a double helix structure, the present invention aims to propose a dresser for dressing welding electrodes with a double helix structure. Having a protrusion Having the protrusion

[0005] To achieve the above object, the technical means of the present invention are realized as follows.

[0006] For welding electrodes with a double helix structure Having a protrusion ​​​A dresser for dressing a welding electrode comprises a dresser assembly, a reciprocating stepping motor, a propulsion screw, a screw support, a fixed base, a dresser assembly rotating base, a base lock block, and two electrode assemblies. The electrode assemblies are respectively provided above and below one side of the dresser assembly. The bottom of the dresser assembly is fixedly connected to the dresser assembly rotating base. The bottom end of the dresser assembly rotating base is rotatably connected to the base lock block. The base lock block is meshingly connected to one end of the propulsion screw. A screw fixing sleeve is fitted outside the propulsion screw. The screw fixing sleeve is fixed to one side of the screw support. The other end of the propulsion screw penetrates through the screw support and is fixedly connected to the output shaft of the reciprocating stepping motor. The bottoms of the reciprocating stepping motor and the screw support are fixedly connected to the fixed base. The electrode assemblies and the reciprocating stepping motor are signal-connected to a controller.

[0007] Furthermore, the dresser assembly comprises a first cutting cutter assembly, a second cutting cutter assembly, a third cutting cutter assembly, and a cutter assembly fixing disk. The cutter assembly fixing disk has a cylindrical structure and is fixedly connected to the first cutting cutter assembly, the second cutting cutter assembly, and the third cutting cutter assembly respectively in the circumferential direction. The bottom is fixedly connected to the dresser assembly rotating base.

[0008] Furthermore, the first cutting cutter assembly includes a first cutter assembly holder, a first cutter assembly base, a first support spring, and two first cutter heads. The first cutter assembly holder is provided on one side of the cutter assembly fixing plate, and the first cutter assembly holder and the cutter assembly fixing plate are formed as an integral structure. A first concave groove is provided at the other end of the first cutter assembly holder, and the first cutter assembly base is attached to the inner wall of the first concave groove. The first support spring is attached to the center of the first cutter assembly base. The first cutter heads are fixedly attached to the upper and lower ends of the first cutter assembly base respectively. The first cutter heads are used to cut the outer edge and the outer peripheral part of the electrode chip of the electrode assembly.

[0009] Furthermore, the second cutting cutter assembly includes a second cutter assembly holder, an upper cutter head base, a lower cutter head base, a second support spring, and two second cutter heads. One end of the second cutter assembly holder is provided on one side of the cutter assembly fixing plate, and the second cutter assembly holder and the cutter assembly fixing plate are formed as an integral structure. A second concave groove is provided at the other end of the second cutter assembly holder, and the upper cutter head base and the lower cutter head base are movably attached to the upper and lower ends of the inner wall of the second concave groove respectively. The structures of the upper cutter head base and the lower cutter head base are the same, and they are symmetrically provided in the second concave groove. The upper cutter head base and the lower cutter head base are fixed to both ends of the second support spring respectively. The second cutter heads are fixedly attached to the top of the upper cutter head base and the bottom of the lower cutter head base respectively. The second cutter heads are used to cut the equally spaced parts of the top convex grooves of the electrode chip.

[0010] Furthermore, the third cutting cutter assembly includes a third cutter assembly holder, a third cutter assembly base, a third support spring, and two third cutter heads. The third cutter assembly holder is provided on one side of the cutter assembly fixing plate, and the third cutter assembly holder and the cutter assembly fixing plate are formed as an integral structure. A third concave groove is provided at the other end of the third cutter assembly holder, and the third cutter assembly base is attached to the inner wall of the third concave groove. The third support spring is attached to the center of the third cutter assembly base, and the third cutter heads are fixedly attached to the upper and lower ends of the third cutter assembly base respectively. The third cutter head is used to cut the interval change part of the top convex groove of the electrode tip.

[0011] Furthermore, the electrode assembly further includes a reciprocating rotation motor, a rotating shaft, a locking head, and three locking buckles. The output shaft of the reciprocating rotation motor is fixedly connected to one end of the rotating shaft, the other end of the rotating shaft is fixedly connected to the bottom of the locking head, three locking buckles are provided in the circumferential direction on the surface of the top of the locking head, the ends of the three locking buckles close to the axis of the locking head are of a curved surface structure, the electrode tip is fixed to the ends of the three locking buckles close to the axis of the locking head, and the reciprocating rotation motor is signal-connected to the controller.

[0012] Furthermore, slide rails are provided at the bottom of the fixed base.

[0013] Compared with the prior art, the dresser for dressing the double helix structure Having a protrusion welding electrode of the present invention has the following advantages. (1) The double helix structure Having a protrusionThe dresser for dressing the welding electrode has a simple structure and a reasonable design. In actual production, due to repeated spot welding, the problem that various degrees of wear and aging occur on the end face of the electrode due to the action of pressure and current is solved. To cope with various aging and worn parts of the electrode tip, three different-shaped cutter heads are provided, which are easy to operate, economical and practical, and easy to popularize.

[0014] Another object of the present invention is to solve the problem that there is no quick and effective dressing method corresponding to the current welding electrode with a double helix structure. Having a protrusion In order to solve the problem that there is no quick and effective dressing method corresponding to the welding electrode with a double helix structure, a dressing method for dressing the welding electrode with a double helix structure is proposed. Having the protrusion

[0015] In order to achieve the above object, the technical means of the present invention are realized as follows.

[0016] double helix structure Having the protrusion A dressing method for dressing a welding electrode with a double helix structure is as follows: S1. Remove the dirt on the surface of the electrode tip, and respectively select the first support spring, the second support spring, and the third support spring that match the three types of cutter heads. S2. Adjust the distance between the two electrode tips, set the pressing forces of the first cutter head, the second cutter head, and the third cutter head with an external power source respectively, and make it the cutting start position of the electrode tip after pressing. S3. Rotate and drive the two electrode tips with two reciprocating rotation motors. S4. Use the first cutter head to cut the outer edge and the outer peripheral part of the electrode tip. S5. Use the second cutter head to cut the equally spaced parts of the top convex grooves of the electrode tip. S6. Use the third cutter head to cut the interval change parts of the top convex grooves of the electrode tip.

[0017] ​Compared with the prior art, the double - helix structure according to the present invention Having the protrusion The dressing method for dressing the welding electrode has the following advantages. (1) The double - helix structure according to the present invention Having the protrusion The dressing method for dressing the welding electrode has a reasonable design. By this method, the cutting cutter of the present invention can simultaneously cut and restore the geometric shape of the welding surface of the welding electrode with a double - helix structure that has experienced various aging mechanisms, which is more accurate and rapid and can maintain high welding quality. Having a protrusion It can simultaneously cut and restore the geometric shape of the welding surface of the welding electrode, is more accurate and rapid, and can maintain high welding quality.

Brief Description of the Drawings

[0018] The drawings constituting a part of the present invention are for further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are for explaining the present invention and do not unduly limit the present invention.

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0020] It should be noted that, unless contradictory, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0021] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "longitudinal direction", "lateral direction", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating and simplifying the description of the present invention, and does not indicate or imply that the mentioned device or component must have a specific orientation and be configured and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. Also, terms such as "first", "second", etc. are only for the purpose of description, and should not be understood as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features. Thus, the features defined by "first", "second", etc. can explicitly or implicitly include one or more of the said features. In the description of the present invention, unless otherwise specified, "a plurality" means two or more.

[0022] In the description of the present invention, unless there are clear regulations and limitations, the terms "mounting", "connecting", "coupling" should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0023] Hereinafter, the present invention will be described in detail with reference to the drawings according to the embodiments.

[0024] As shown in FIGS. 1 to 6, a double helix structure Having the protrusionA dresser for dressing a welding electrode includes a dresser assembly 1, a reciprocating stepping motor 3, a propulsion screw 4, a screw support 5, a fixed base 6, a rotating base 7 of the dresser assembly, a base lock block 8, and two electrode assemblies 2. The electrode assemblies 2 are respectively provided above and below one side of the dresser assembly 1. The bottom of the dresser assembly 1 is fixedly connected to the rotating base 7 of the dresser assembly. The bottom end of the rotating base 7 of the dresser assembly is rotatably connected to the base lock block 8. The rotatable connection between the rotating base 7 of the dresser assembly and the base lock block 8 facilitates the operator to replace different cutter heads. The base lock block 8 is meshed and connected to one end of the propulsion screw 4. In actual use, as shown in FIG. 6, the base lock block 8 is fitted to the outer wall of the propulsion screw 4 (a long through hole is provided on the outer wall of the propulsion screw 4 so that the base lock block 8 can move the propulsion screw 4 back and forth), and the base lock block 8 is meshed and connected to the propulsion screw 4. Since the base lock block 8 functions as a screw nut, when the propulsion screw 4 rotates, the base lock block 8 moves back and forth along the axial direction of the propulsion screw 4. The back-and-forth movement of the base lock block 8 causes the rotating base 7 of the dresser assembly to move back and forth, and the back-and-forth movement of the rotating base 7 of the dresser assembly causes the dresser assembly 1 to move back and forth. A screw fixing sleeve is fitted outside the propulsion screw 4. The screw fixing sleeve is fixed to one side of the screw support 5. The other end of the propulsion screw 4 passes through the screw support 5 and is fixedly connected to the output shaft of the reciprocating stepping motor 3. The bottoms of the reciprocating stepping motor 3 and the screw support 5 are fixedly connected to the fixed base 6. The electrode assembly 2 and the reciprocating stepping motor 3 are signal-connected to a controller. In actual production, due to repeated spot welding, various degrees of wear and aging occur on the end face of the electrode under the action of pressure and current. This is mainly due to the increase in the temperature of the welding surface of the electrode during welding, resulting in local plastic deformation, or the adhesion caused by the reaction between the electrode and the material, resulting in the accumulation of contaminants.The aging deterioration and shape changes of the electrode can cause problems such as a decrease in welding quality and surface quality. Therefore, it is very important to regularly restore the welding surface to its original shape. Furthermore, it is also very important to quickly and accurately restore it without interrupting production. A double helix structure suitable for this dressing method. Having a protrusion For the specific structure and operating principle of the welding electrode tip, reference can be made to Patent CN202110273861.7.

[0025] As a result of intensive research, the present application has developed a cutting cutter and its method for dressing a welding electrode with a double helix structure. Compared with the prior art, the cutting cutter of the present invention can simultaneously cut and restore the geometric shape of the welding surface of the double helix structure welding electrode that has experienced various aging deterioration mechanisms, is more accurate and rapid, and can maintain high welding quality.

[0026] The dresser assembly 1 includes a first cutting cutter assembly 11, a second cutting cutter assembly 12, a third cutting cutter assembly 13, and a cutter assembly fixing plate 14. The cutter assembly fixing plate 14 has a cylindrical structure and is fixedly connected to the first cutting cutter assembly 11, the second cutting cutter assembly 12, and the third cutting cutter assembly 13 in the circumferential direction, and the bottom is fixedly connected to the dresser assembly rotating base 7. Suitable for different spacing widths between the spiral convex grooves at the top of the electrode tip 25, and to enhance practicality, the cutting cutter is divided into three parts. The first part is the outer edge and central cutting cutter, that is, the first cutting cutter assembly 11, the second part is the rotating cutting cutter with a fixed width, that is, the second cutting cutter assembly 12, and the third part is the cutting cutter with a variable width double helix structure, that is, the third cutting cutter assembly 13.

[0027] The first cutting cutter assembly 11 includes a first cutter assembly holder 112, a first cutter assembly base 113, a first support spring 114, and two first cutter heads 111. The first cutter assembly holder 112 is provided on one side of the cutter assembly fixing plate 14, and the first cutter assembly holder 112 and the cutter assembly fixing plate 14 are formed as an integral structure. A first concave groove is provided at the other end of the first cutter assembly holder 112, and the first cutter assembly base 113 is attached to the inner wall of the first concave groove. The first support spring 114 is attached to the center of the first cutter assembly base 113, and the first cutter heads 111 are fixedly attached to the upper and lower ends of the first cutter assembly base 113 respectively. The first cutter head 111 is used to cut the outer edge and the outer peripheral portion of the electrode tip 25 of the electrode assembly 2. In this embodiment, the first cutter head 111 has a special-shaped structure composed of a right angle and a curve in a front view in order to correspond to the cutting of the outer edge and the outer peripheral portion of the electrode tip 25.

[0028] The second cutting cutter assembly 12 includes a second cutter assembly holder 122, an upper cutter head base 123, a lower cutter head base 124, a second support spring 125, and two second cutter heads 121. One end of the second cutter assembly holder 122 is provided on one side of the cutter assembly fixing plate 14, and the second cutter assembly holder 122 and the cutter assembly fixing plate 14 are formed as an integral structure. A second concave groove is provided at the other end of the second cutter assembly holder 122. The upper cutter head base 123 and the lower cutter head base 124 are movably attached to the upper and lower ends of the inner wall of the second concave groove respectively. The structures of the upper cutter head base 123 and the lower cutter head base 124 are the same, and both are symmetrically provided in the second concave groove. The upper cutter head base 123 and the lower cutter head base 124 are fixed to both ends of the second support spring 125 respectively. The second cutter heads 121 are fixedly attached to the top of the upper cutter head base 123 and the bottom of the lower cutter head base 124 respectively. The second cutter heads 121 are used to cut the equally spaced portions of the top convex grooves of the electrode chip 25. In this embodiment, the second cutter head 121 has a special-shaped structure that is a rectangle with two right angles cut out in a side view in order to correspond to the cutting of the equally spaced portions of the top convex grooves of the electrode chip 25.

[0029] The third cutting cutter assembly 13 includes a third cutter assembly holder 132, a third cutter assembly base 133, a third support spring 134, and two third cutter heads 131. The third cutter assembly holder 132 is provided on one side of the cutter assembly fixing plate 14, and the third cutter assembly holder 132 and the cutter assembly fixing plate 14 are formed as an integral structure. A third concave groove is provided at the other end of the third cutter assembly holder 132, and the third cutter assembly base 133 is attached to the inner wall of the third concave groove. The third support spring 134 is attached to the center of the third cutter assembly base 133, and the third cutter heads 131 are fixedly attached to the upper and lower ends of the third cutter assembly base 133 respectively. The third cutter head 131 is used to cut the interval change part of the top convex groove of the electrode tip 25. The structures of the first cutter assembly base 113 and the third cutter assembly base 133 are the same as the structure of the second cutter assembly base. In this embodiment, the third cutter head 131 has a deformed structure that is hook-shaped in plan view to correspond to the cutting of the interval change part of the top convex groove of the electrode tip 25.

[0030] The electrode assembly 2 further includes a reciprocating rotation motor 21, a rotating shaft 22, a locking head 23, and three locking buckles 24. The output shaft of the reciprocating rotation motor 21 is fixedly connected to one end of the rotating shaft 22, the other end of the rotating shaft 22 is fixedly connected to the bottom of the locking head 23, and three locking buckles 24 are provided in the circumferential direction on the surface of the top of the locking head 23. The ends of the three locking buckles 24 close to the axis of the locking head 23 have a curved surface structure, and the electrode tip 25 is fixed to the ends of the three locking buckles 24 close to the axis of the locking head 23. The reciprocating rotation motor 21 is signal-connected to the controller. In specific use, the output shaft of the reciprocating rotation motor 21 rotates to rotate the rotating shaft 22, the rotating shaft 22 rotates to rotate the locking head 23, the locking head 23 rotates to rotate the electrode tip 25, and the electrode tip 25 rotates to correspond to the cutting of the three cutter heads.

[0031] Slide rails are provided at the bottom of the fixed table 6. By providing the slide rails, it becomes easier for the operator to send the dresser to the cutting station, saving time and labor and increasing the cutting speed.

[0032] Both the controller and the reciprocating stepping motor 3 are of the prior art. The controller may be a PLC or an industrial computer.

[0033] Double helix structure Having the protrusion The operating principle of the dresser for dressing the welding electrode is as follows.

[0034] When using the first cutter head 111, the operator presses the first cutter head 111 to the cutting start position of the electrode tip 25 and manually activates the controller. The controller controls the start of the operation of the two reciprocating rotation motors 21, and the output shafts of the upper and lower two reciprocating rotation motors 21 rotate to rotate the two electrode tips 25 respectively, so as to achieve the purpose of the dresser assembly 1 cutting the rotating electrode tip 25.

[0035] When using the second cutter head 121 or the third cutter head 131, the operator presses the second cutter head 121 or the third cutter head 131 against the cutting start position of the electrode tip 25 and manually activates the controller. The controller controls the start of the operation of the reciprocating stepping motor 3 and the two reciprocating rotary motors 21. The output shafts of the two upper and lower reciprocating rotary motors 21 rotate to rotate the two electrode tips 25 respectively. The output shaft of the reciprocating stepping motor 3 rotates the propulsion screw 4 (since the base lock block 8 functions as a screw nut, when the propulsion screw 4 rotates, the screw nut moves the propulsion screw 4 back and forth). Due to the rotation of the propulsion screw 4, the base lock block 8 moves back and forth along the axial direction of the propulsion screw 4. Due to the back and forth movement of the base lock block 8, the dresser assembly rotating base 7 moves back and forth. Due to the back and forth movement of the dresser assembly rotating base 7, the dresser assembly 1 moves back and forth. By moving the dresser assembly 1 forward towards the center of the electrode tip 25 according to the rotation speed, the purpose of cutting the rotating electrode tip 25 is achieved.

[0036] Double helix structure Having the protrusion The dressing method for dressing a welding electrode includes the following steps.

[0037] A1. Remove the dirt on the surface of the electrode tip 25, clean the electrode tip 25, and select the first support spring 114, the second support spring 125, and the third support spring 134 that match the three types of cutter heads respectively. Specifically, in this embodiment, after the operator removes the dirt on the electrode tip 25 according to the material and removal strength of the electrode tip 25, subsequent operations are performed.

[0038] A2. Adjust the distance between the two electrode chips 25, and use the first cutter head 111 to cut the outer edge and the outer peripheral part of the electrode chip 25. Specifically, in this embodiment, the operator selects the first support spring 114 with a strength corresponding to the first cutter head 111, presses the first cutter head 111 by an external power source to set it at the cutting start position of the electrode chip 25, and the two reciprocating rotary motors 21 above and below drive the electrode chip 25 to rotate to achieve the purpose of cutting.

[0039] A3. Use the second cutter head 121 to cut the equally spaced parts of the top convex grooves of the electrode chip 25. Specifically, the equally spaced parts of the top convex grooves are the parts away from the center of the circle at the top of the electrode chip 25. In this embodiment, the operator selects the second support spring 125 with a strength corresponding to the second cutter head 121, presses the second cutter head 121 by an external power source to set it at the cutting start position of the electrode chip 25, the two reciprocating rotary motors 21 above and below rotate, and the reciprocating stepping motor 3 advances towards the center of the electrode chip 25 according to the rotation speed, so as to ensure that the central part of the second cutter head 121 rotates and advances along the groove center line on the surface of the electrode chip 25.

[0040] A4. Use the third cutter head 131 to cut the interval changing parts of the top convex grooves of the electrode chip 25. Specifically, the interval changing parts of the top convex grooves are the parts close to the center of the circle at the top of the electrode chip 25. In this embodiment, the operator selects the third support spring 134 with a strength corresponding to the third cutter head 131, presses the third cutter head 131 by an external power source to set it at the cutting start position of the electrode chip 25, the two reciprocating rotary motors 21 above and below rotate, and the reciprocating stepping motor 3 advances towards the center of the electrode chip 25 according to the rotation speed, so as to ensure that the outer edge part of the third cutter head 131 rotates and advances along the groove outer edge on the surface of the electrode chip 25.

[0041] Example 1 1. The cutting cutter can rotate around the axes of the first welding surface and the second welding surface. Here, rotation means that the operator can rotate the cutting cutter to select the first cutter head 111, the second cutter head 121, or the third cutter head, and the first welding surface and the second welding surface are the surfaces of the upper and lower two electrode tips 25 to be cut. When restoring the first welding surface and the second welding surface, materials in the range of 10 to 500 microns from the surface are removed. Also, it is possible to dress the welding surface after 10 to 1000 uses.

[0042] 2. Different-sized cutting cutters can be used for welding electrode tips with different double helix structures.

[0043] 3. According to the materials and states of the surfaces of different electrode tips 25, cutter heads of different materials and rotational feed speeds can be selected to completely clean the surfaces of the electrode tips 25.

[0044] Best Mode: In this best mode, after the welding surface has been used about 500 times, the electrode tip 25 is dressed.

[0045] The dressing of the electrode tip with a double helix structure is divided into four steps. In the preparatory work of the first step, the oil stains on the surface of the electrode tip 25 are removed, the electrode tip 25 is attached to the upper and lower two reciprocating rotation motors, and the speed at which the upper and lower two reciprocating rotation motors 21 drive the rotation of the electrode tip 25 is set to 1 r / min.

[0046] In the second step, it is not necessary to push the first cutter head 111 by the reciprocating stepping motor 3 during rotation. In the third and fourth steps, based on the conventional electrode tip 25, when the interval of the parallel convex grooves is 6 mm and the speed at which the reciprocating rotation motor 21 drives the rotation of the electrode tip 25 is set to 1 r / min, the forward speed of the reciprocating stepping motor 3 becomes 6 mm / min.

[0047] Also, when dressing, the pressing forces of the first cutter head 111, the second cutter head 121, and the third cutter head 131 are set to 650 N, 50 N, and 1750 N respectively according to the contact areas between different cutter heads and the electrode tip 25. Specifically, the second cutter head 121 is pressed by an external power source (the external power source is a prior art. As long as the external power source does not affect the cutting of the electrode tip 25, a conventional drive motor can be used to drive the drive screw to press the bases of the three cutter heads to the prestress set by the three support springs, and also a conventional electric telescopic rod can be used to press the bases of the three cutter heads to the prestress set by the three support springs. Similarly, it is necessary to ensure that the external power source does not affect the cutting of the electrode tip 25) to push the upper cutter head base 123 and the lower cutter head base 124 into the second support spring 125, and a distance sensor (the distance sensor is also a prior art) monitors the compression distance of the second support spring 125 to calculate the pressure value (the principles of the pressing forces of the first cutter head 111 and the third cutter head 131 are the same as that of the pressing force of the second cutter head 121, so the description is omitted here). The final cutting depth is about 200 microns.

[0048] The above are only the preferred embodiments of the present invention, not intended to limit the present invention. All modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Description of Reference Numerals

[0049] 1: Dressing Assembly 11: First Cutting Cutter Assembly 111: First Cutter Head 112: First Cutter Assembly Holder 113: First Cutter Assembly Base 114: First Support Spring 12: Second Cutting Cutter Assembly 121: Second Cutter Head 122: Second cutter assembly holder 123: Upper cutter head base 124: Lower cutter head base 125: Second support spring 13: Third cutting cutter assembly 131: Third cutter head 132: Third cutter assembly holder 133: Third cutter assembly base 134: Third support spring 14: Cutter assembly fixing plate 2: Electrode assembly 21: Reciprocating rotary motor 22: Rotating shaft 23: Lock head 24: Lock buckle 25: Electrode tip 3: Reciprocating stepping motor 4: Propulsion screw 5: Screw support part 6: Fixed table 7: Dresser assembly rotating base 8: Base lock block

Claims

1. A dresser for dressing a welding electrode having protrusions of a double helix structure, comprising a dresser assembly (1), a reciprocating stepping motor (3), a propulsion screw (4), a screw support portion (5), a fixed base (6), a dresser assembly rotating base (7), a base lock block (8), and two electrode assemblies (2). The electrode assemblies (2) are respectively provided above and below one side of the dresser assembly (1). The bottom of the dresser assembly (1) is fixedly connected to the dresser assembly rotating base (7). The bottom end of the dresser assembly rotating base (7) is rotatably connected to the base lock block (8). The base lock block (8) is meshingly connected to one end of the propulsion screw (4). A screw fixing sleeve is fitted outside the propulsion screw (4). The screw fixing sleeve is fixed to one side of the screw support portion (5). The other end of the propulsion screw (4) passes through the screw support portion (5) and is fixedly connected to the output shaft of the reciprocating stepping motor (3). The bottoms of the reciprocating stepping motor (3) and the screw support portion (5) are fixedly connected to the fixed base (6). The electrode assembly (2) and the reciprocating stepping motor (3) are signal-connected to a controller. The dresser assembly (1) comprises a first cutting cutter assembly (11), a second cutting cutter assembly (12), a third cutting cutter assembly (13), and a cutter assembly fixing disk (14). The cutter assembly fixing disk (14) has a cylindrical structure and is fixedly connected to the first cutting cutter assembly (11), the second cutting cutter assembly (12), and the third cutting cutter assembly (13) respectively in the circumferential direction. The bottom is fixedly connected to the dresser assembly rotating base (7). The first cutting cutter assembly (11) includes a first cutter assembly holder (112), a first cutter assembly base (113), a first support spring (114), and two first cutter heads (111). The first cutter assembly holder (112) is provided on one side of the cutter assembly fixing plate (14). The first cutter assembly holder (112) and the cutter assembly fixing plate (14) are formed as an integral structure. A first concave groove is provided at the other end of the first cutter assembly holder (112), and the first cutter assembly base (113) is attached to the inner wall of the first concave groove. The first support spring (114) is attached to the center of the first cutter assembly base (113). The first cutter heads (111) are fixedly attached to the upper and lower ends of the first cutter assembly base (113) respectively. The first cutter head (111) is used to cut the outer edge and the outer peripheral part of the electrode tip (25) of the electrode assembly (2). The second cutting cutter assembly (12) includes a second cutter assembly holder (122), an upper cutter head base (123), a lower cutter head base (124), a second support spring (125), and two second cutter heads (121). One end of the second cutter assembly holder (122) is provided on one side of the cutter assembly fixing plate (14). The second cutter assembly holder (122) and the cutter assembly fixing plate (14) are formed as an integral structure. A second concave groove is provided at the other end of the second cutter assembly holder (122), and the upper cutter head base (123) and the lower cutter head base (124) are movably attached to the upper and lower ends of the inner wall of the second concave groove respectively. The structures of the upper cutter head base (123) and the lower cutter head base (124) are the same, and both are symmetrically provided in the second concave groove. The upper cutter head base (123) and the lower cutter head base (124) are respectively fixed to both ends of the second support spring (125). The second cutter heads (121) are fixedly attached to the top of the upper cutter head base (123) and the bottom of the lower cutter head base (124) respectively. The second cutter head (121) is used to cut the equally spaced parts of the top convex groove of the electrode tip (25). The third cutting cutter assembly (13) includes a third cutter assembly holder (132), a third cutter assembly base (133), a third support spring (134), and two third cutter heads (131). The third cutter assembly holder (132) is provided on one side of the cutter assembly fixing plate (14). The third cutter assembly holder (132) and the cutter assembly fixing plate (14) are formed as an integral structure. A third concave groove is provided at the other end of the third cutter assembly holder (132), and the third cutter assembly base (133) is attached to the inner wall of the third concave groove. The third support spring (134) is attached to the center of the third cutter assembly base (133). The third cutter heads (131) are fixedly attached to the upper and lower ends of the third cutter assembly base (133) respectively. The third cutter head (131) is used to cut the interval change part of the top convex groove of the electrode tip (25). A dresser for dressing a welding electrode having a double helix structure of protrusions, characterized in that.

2. The electrode assembly (2) further includes a reciprocating rotation motor (21), a rotating shaft (22), a lock head (23), and three lock buckles (24). The output shaft of the reciprocating rotation motor (21) is fixedly connected to one end of the rotating shaft (22). The other end of the rotating shaft (22) is fixedly connected to the bottom of the lock head (23). Three lock buckles (24) are provided on the surface of the top of the lock head (23) in the circumferential direction. The ends of the three lock buckles (24) close to the axis of the lock head (23) have a curved surface structure. The electrode tip (25) is fixed to the ends of the three lock buckles (24) close to the axis of the lock head (23). The reciprocating rotation motor (21) is signal-connected to a controller. A dresser for dressing a welding electrode having a double helix structure of protrusions according to claim 1, characterized in that.

3. A slide rail is provided at the bottom of the fixed base (6). A dresser for dressing a welding electrode having a double helix structure of protrusions according to claim 1, characterized in that.

4. A dressing method for a dresser for dressing a welding electrode having a double helix structure of protrusions according to any one of claims 1 to 3, S1. Remove the dirt on the surface of the electrode tip (25), and select the first support spring (114), the second support spring (125), and the third support spring (134) that match the three types of cutter heads respectively; S2. Adjust the distance between the two electrode tips (25), set the pressing forces of the first cutter head (111), the second cutter head (121), and the third cutter head (131) with an external power source respectively, and make it the cutting start position of the electrode tip (25) after pressing; S3. Rotationally drive the two electrode tips (25) by two reciprocating rotation motors (21); S4. Use the first cutter head (111) to cut the outer edge and the outer peripheral part of the electrode tip (25); S5. Use the second cutter head (121) to cut the equally spaced part of the top convex groove of the electrode tip (25); S6. Use the third cutter head (131) to cut the interval change part of the top convex groove of the electrode tip (25). A dressing method of a dresser, characterized by including the above steps.

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