A quick polishing tooling for resistance welding electrode tip

Abstract

The utility model relates to the field of process equipment, concretely to a resistance welding electrode head quick polishing frock, including first locating plate and second locating plate are connected with each other, first locating plate sets up vertically, second locating plate sets up horizontally, second locating plate connects polishing assembly, polishing assembly includes feed assembly and electrode head fixed plate, electrode head fixed plate is equipped with at least two electrode positioning slot, electrode positioning slot buckling electrode pressure plate. The utility model has simple structure, and the cost is relatively low, can effectively polish the welding surface of electrode head, and the welding surface after polishing is even, keeps the original inclination angle.

Description

Technical Field

[0001] This utility model relates to the field of process equipment, specifically a tooling for rapid grinding of resistance welding electrode heads. Background Technology

[0002] Resistance welding is a commonly used welding process in non-standard manufacturing fields such as automotive, medical, and 3C products. The electrode tip for resistance welding is a consumable. During use, prolonged exposure to high temperatures, thermal shock, contaminants, and welding sparks can cause pitting on the electrode tip surface. These pits affect welding performance, and over time, the pits become larger, gradually reducing the welding performance of the electrode tip. In severe cases, metal spatter and weld sticking can occur. If the product sticks to the electrode tip, it may cause an accident involving impact between the product and the equipment, resulting in the scrapping of the product and electrode tip, or even equipment damage. When the electrode tip develops pits, it must be replaced promptly before production can continue. Furthermore, resistance welding electrodes use tungsten metal, which is expensive, representing a significant cost in mass production.

[0003] Besides replacing electrode heads with pitted surfaces, the electrode heads can also be returned to the factory for repair and reprocessing by the electrode head manufacturer. However, the processing cost is high, approximately one-half to one-third of the cost of a brand new electrode head each time. Furthermore, manual grinding cannot guarantee the flatness and angle of the electrode head's welding surface, affecting normal production.

[0004] Chinese Patent No. CN208276377U discloses an automatic welding head grinding mechanism, including a base, an X-axis working platform, a Y-axis working platform, a welding head, a welding head drive device, a welding head base, a support base, and a sanding belt assembly. This utility model's automatic welding head grinding mechanism for the negative electrode can automatically grind spot welding electrodes, eliminating the need for manual grinding and improving work efficiency while saving labor costs. However, the aforementioned utility model is inconvenient for grinding the beveled surface of the electrode head, and the overall manufacturing cost of the mechanism is relatively high. Utility Model Content

[0005] In view of the problems that existing grinding equipment for welding heads or electrode heads is inconvenient for grinding beveled surfaces and has a generally high manufacturing cost, this utility model proposes a simple structure with relatively low manufacturing cost, which can grind at least two electrode heads at the same time and is convenient for grinding beveled surfaces.

[0006] To achieve the above-mentioned technical effects, this utility model proposes:

[0007] A quick grinding fixture for resistance welding electrode heads includes a first positioning plate and a second positioning plate connected to each other. The first positioning plate is vertically arranged, and the second positioning plate is horizontally arranged. The second positioning plate is connected to a grinding assembly. The grinding assembly includes a feeding assembly and an electrode head fixing plate. The electrode head fixing plate is provided with at least two electrode positioning grooves, which engage with electrode pressure plates.

[0008] This utility model can be connected to a finished belt sander. Based on the connection holes on the side of the finished belt sander, a first positioning plate and a second positioning plate are customized to ensure that the second positioning plate is perpendicular to the grinding surface of the belt sander. The feed assembly and the electrode head fixing plate are set on the surface of the second positioning plate, and the feed direction of the feed assembly is perpendicular to the grinding surface of the belt sander. The positive electrode head and the negative electrode head are fixed on the electrode head fixing plate. The feeding assembly can be manually operated to disconnect the welding surface of the electrode head from the grinding surface of the belt sander for grinding.

[0009] The electrode head fixing plate includes a fixing part and a grinding part. The fixing part is fixedly connected to the feeding assembly. The grinding part is provided with a positive electrode positioning groove and a negative electrode positioning groove. The positive electrode positioning groove engages with the positive electrode pressure plate, and the negative electrode positioning groove engages with the negative electrode pressure plate.

[0010] The positive electrode positioning groove is perpendicular to the feeding direction of the feeding component, and the negative electrode positioning groove is at an angle α to the positive electrode positioning groove, where 15°≤α≤45°. The positive electrode head is ground on its side surface, and the negative electrode head is ground on its end bevel, thus creating an angle α between the negative electrode groove and the positive electrode groove. The angle α is set according to the angle of the end bevel of the negative electrode head. Based on the actual bevel of the negative electrode head end, the angle α between the positive and negative electrode positioning grooves can be selected from 15° to 45°.

[0011] The positive electrode positioning groove and the negative electrode positioning groove are respectively configured with one end open and the other end closed along the length direction, and the closed end is provided with a reserved hole. The reserved hole allows the end of the electrode head connector to effectively abut against the closed end of the positioning groove and be positioned in place; the reserved hole makes the closed end of the positioning groove form an independent platform.

[0012] The electrode positioning plate has a polishing groove, and the open ends of the positive electrode positioning groove and the negative electrode positioning groove are located within the polishing groove. The polishing groove is where the end of the electrode head to be polished is located, and the flying debris generated during the polishing process falls through the polishing groove.

[0013] The first positioning plate and the second positioning plate are L-shaped. The first positioning plate and the second positioning plate can be optionally set to L-shape, depending on the structure of different belt sanders.

[0014] The feeding assembly includes a base and a slide, the slide being slidably connected to the base, the slide having a trapezoidal mating surface, and the base having a trapezoidal mating groove, the trapezoidal mating surface and the trapezoidal mating groove being slidably mated.

[0015] The base has a feed knob and a locking knob on its side. The feed knob mates with the trapezoidal mating surface. The trapezoidal mating groove has a reserved groove on the side near the locking knob. The locking knob passes through the reserved groove and abuts against the reserved groove on the side near the trapezoidal mating groove.

[0016] The second positioning plate is connected to the feed assembly via an adapter plate, and the adapter plate is bolted to the second positioning plate.

[0017] The beneficial effects of this utility model are:

[0018] 1. Simple structure and low cost, can be directly used in finished belt sanders, etc.; 2. It can effectively grind the welding surface of the electrode head, with good forming effect, and can grind the beveled end of the electrode head; 3. Simple operation, the electrode head is firmly fixed, and it has higher safety and accuracy compared with manual grinding. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a rapid grinding fixture for resistance welding electrode heads.

[0020] Figure 2 This is a schematic diagram of the electrode positioning plate in Example 1.

[0021] Figure 3 This is the main view of the feed component.

[0022] Figure 4 This is a schematic diagram of the structure of the first positioning plate and the second positioning plate in Embodiment 1.

[0023] Figure 5 This is a schematic diagram of the assembly of the resistance welding electrode head quick grinding fixture and the belt sander in Example 1.

[0024] Icon labels:

[0025] 1. First positioning plate; 2. Second positioning plate; 3. Feed assembly; 4. Electrode head fixing plate; 5. Belt sander;

[0026] 301. Base; 302. Slide table; 303. Trapezoidal mating surface; 304. Trapezoidal mating groove; 305. Feed knob; 306. Locking knob; 307. Reserved groove; 308. Adapter plate;

[0027] 401. Electrode positioning groove; 402. Electrode pressure plate; 403. Fixing part; 404. Grinding part; 405. Positive electrode positioning groove; 406. Negative electrode positioning groove; 407. Positive electrode pressure plate; 408. Negative electrode pressure plate; 409. Reserved hole; 410. Grinding groove. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0029] This utility model provides a quick grinding fixture for resistance welding electrode heads. The preferred embodiment of the quick grinding fixture for resistance welding electrode heads is described below.

[0030] Example 1

[0031] Reference Appendix Figure 1 In this embodiment, the rapid grinding fixture for resistance welding electrode heads includes a first positioning plate 1 and a second positioning plate 2 connected to each other. The first positioning plate 1 is vertically arranged, and the second positioning plate 2 is horizontally arranged. The second positioning plate 2 is connected to a grinding assembly, which includes a feeding assembly 3 and an electrode head fixing plate 4. The electrode head fixing plate 4 is provided with at least two electrode positioning grooves 401, which engage with an electrode pressure plate 402. In this embodiment, two electrode positioning grooves 401 are provided, namely a positive electrode positioning groove 405 and a negative electrode positioning groove 406.

[0032] Reference Appendix Figure 4 Both the first positioning plate 1 and the second positioning plate 2 are L-shaped. In some other embodiments, the shapes of the first positioning plate 1 and the second positioning plate 2 can be set in other ways, as long as the first positioning plate 1 and the second positioning plate 2 are connected to ensure that the second positioning surface is perpendicular to the grinding surface of the sander belt 5 and perpendicular to the running direction of the sander belt's grinding surface. In this embodiment, the first positioning plate 1 is bolted to the sander belt 5 to ensure vertical setting; the second positioning plate 2 is bolted to the first positioning plate 1 to ensure horizontal setting. The first positioning plate 1 and the second positioning plate 2 can basically position the feed direction of the grinding assembly perpendicular to the grinding surface of the sander belt 5.

[0033] The grinding assembly is used to position and mount the electrode head to be ground, and is manually operated to grind the electrode head. The grinding assembly includes an electrode fixing plate, which is the component for mounting the electrode head to be ground. Its surface has at least two electrode positioning grooves 401. The electrode to be ground is fixed in the electrode positioning grooves 401 by an electrode pressure plate 402. The electrode fixing plate is fixedly connected to the feed assembly 3 by bolts.

[0034] Reference Appendix Figure 2The electrode head fixing plate 4 includes a fixing part 403 and a grinding part 404. The fixing part 403 is fixedly connected to the feeding assembly 3. The fixing part 403 has several through holes and is fixedly connected to the feeding assembly 3 by bolts to achieve the positioning of the electrode positioning plate. The positive electrode positioning groove 405 is provided on the right side of the grinding part 404, and the negative electrode positioning groove 406 is provided on the left side of the grinding part 404. The positive electrode positioning groove 405 engages with the positive electrode pressure plate 407, and the negative electrode positioning groove 406 engages with the negative electrode pressure plate 408.

[0035] In this embodiment, the grinding section 404 includes two parts, each extending from the fixing section 403, including a negative electrode fixing section and a positive electrode fixing section. A grinding groove 410 is formed between the positive electrode fixing section and the negative electrode fixing section, and the grinding groove 410 accommodates the parts of the positive electrode head and the negative electrode head to be ground. The welding plane of the positive electrode head is located on the side of its electrode head. When grinding the positive electrode head, the arrangement direction of the positive electrode head needs to be parallel to the grinding surface of the belt sander, that is, the arrangement direction of the positive electrode positioning groove is parallel to the grinding surface of the belt sander. Similarly, the negative electrode positioning groove is inclined.

[0036] In this embodiment, the positive electrode positioning groove 405 is set perpendicular to the feeding direction of the feeding component 3, and the side of the positive electrode head can be polished by the belt sander 5; the negative electrode positioning groove 406 is set at an angle α with the positive electrode positioning groove 405, and this angle α corresponds to the end bevel of the negative electrode head. The electrode positioning plate has a polishing groove 410, and the open ends of the positive electrode positioning groove 405 and the negative electrode positioning groove 406 are located in the polishing groove 410. The positive electrode head and the negative electrode head are fixed on the electrode head positioning plate respectively, and the welding ends of the two electrode heads are located in the polishing groove 410.

[0037] Reference Appendix Figure 2 In this embodiment, the included angle α between the negative electrode positioning groove 406 and the positive electrode positioning groove 405 is 20°.

[0038] The widths of the positive electrode positioning groove 405 and the negative electrode positioning groove 406 are set according to the width of the electrode head connector, which can limit the degree of freedom of the electrode head in the width direction. The positive electrode positioning groove 405 and the negative electrode positioning groove 406 are respectively designed to be open at one end and closed at the other end along the length direction, with a reserved hole 409 at the closed end. The reserved hole 409 is located at the two corners of the closed end, forming an independent platform at the end of the closed end, which abuts against the end of the electrode head connector, thus limiting the degree of freedom of the electrode head along its length direction. The reserved hole 409 can prevent the closed end from colliding with the bottom edge of the electrode head connector, or prevent mispositioning due to the presence of foreign objects.

[0039] Taking the negative electrode head as an example, place the connector of the electrode head into the negative electrode positioning groove 406, and ensure that the end of the connector is in contact with the bottom of the groove. Since there is a certain tolerance between the width of the negative electrode positioning groove 406 and the width of the connector of the negative electrode head in actual manufacturing, ensure that the surface of the negative electrode head to be ground faces the grinding surface of the belt sander 5, and that the side of the connector away from the surface to be ground is in close contact with the opposite side of the negative electrode positioning groove 406. Finally, fasten the negative electrode pressure plate 408 to the negative electrode positioning groove 406 with bolts to press the negative electrode head firmly, completing the positioning. The positive electrode head is positioned similarly. Another method for positioning the electrode head is to insert the positive electrode head and the negative electrode head into the positive positioning groove 405 and the negative positioning groove 406 respectively, manually operate the metal assembly 3, and bring the surfaces of the negative electrode head and the positive electrode head to be polished into contact with the abrasive belt and fit them together adaptively. Then, fasten the positive electrode plate 407 and the negative electrode plate 408 to fix the positive electrode head and the negative electrode head in place.

[0040] Reference Appendix Figure 3 In this embodiment, the feed assembly 3 includes a base 301 and a slide 302. The slide 302 is slidably connected to the base 301. The slide 302 has a trapezoidal mating surface 303, and the base 301 has a trapezoidal mating groove 304. The trapezoidal mating surface and the trapezoidal mating groove 304 are slidably mated. A feed knob 305 and a locking knob 306 are provided on the side of the base 301. The feed knob 305 mates with the trapezoidal mating surface 303. The trapezoidal mating groove 304 has a reserved groove 307 near the locking knob 306. The locking knob 306 passes through the reserved groove 307 and abuts against the reserved groove 307 near the trapezoidal mating groove 304. The feed direction of the feed assembly 3 is perpendicular to the grinding surface of the belt sander 5. The trapezoidal mating surface 303 and the trapezoidal mating groove 304 of the feed assembly 3 can ensure the stable connection of the feed assembly 3 and the stable and accurate feed direction.

[0041] During the grinding of the electrode head, the feed knob 305 needs to be manually operated to bring the grinding groove 410 closer to the grinding surface of the belt sander 5 or retract it. The locking knob 306 is screwed to the base 301. When the locking knob 306 is rotated, the part of the locking knob 306 located in the reserved groove 307 can further press against the trapezoidal mating groove 304 and the trapezoidal mating surface 303, so that the sliding fit between the slide table 302 and the base 301 is locked.

[0042] An adapter plate 308 is connected below the base 301 of the feed assembly 3. The feed assembly 3 is bolted to the second positioning plate 2 via the adapter plate 308. Since the first positioning plate 1 and the second positioning plate 2 are customized according to different belt sanders, the connection between the second positioning plate 2 and the feed assembly 3 requires repeated adaptation, which is inconvenient. By setting the adapter plate 308, the feed assembly 3 can be connected only to the adapter plate 308. The second positioning plate 2 only needs to have bolt positioning holes made with the adapter plate 308 and be connected by bolts to achieve the connection and positioning of the feed assembly 3 and the second positioning plate 2.

[0043] Reference Appendix Figure 4 and 5 The first positioning plate 1 is adjusted in length and slidably connected to the belt sander 5 through a long strip-shaped through hole and bolts, and positioned and fixedly connected through another through hole. The second positioning plate 2 is fixedly connected to the first positioning plate 1 by bolts.

[0044] Example 2

[0045] Continue to refer to the appendix Figures 1 to 5 In this embodiment, the rapid grinding fixture for resistance welding electrode heads includes a first positioning plate 1 and a second positioning plate 2 connected to each other. The first positioning plate 1 is vertically arranged, and the second positioning plate 2 is horizontally arranged. The second positioning plate 2 is connected to a grinding assembly, which includes a feed assembly 3 and an electrode head fixing plate 4. The electrode head fixing plate 4 is provided with at least two electrode positioning grooves 401, which engage with an electrode pressure plate 402. In this embodiment, two electrode positioning grooves 401 are provided, namely a positive electrode positioning groove 405 and a negative electrode positioning groove 406. Both the first positioning plate 1 and the second positioning plate 2 are L-shaped. The first positioning plate 1 and the second positioning plate 2 are configured according to the structure and size of the selected belt sander 5. An adapter plate 308 is connected below the base 301 of the feed assembly 3, and the feed assembly 3 is bolted to the second positioning plate 2 through the adapter plate 308.

[0046] The grinding assembly is used to position and mount the electrode head to be ground, and is manually operated to grind the electrode head. The grinding assembly includes an electrode fixing plate, which is the component for mounting the electrode head to be ground. Its surface has at least two electrode positioning grooves 401. The electrode to be ground is fixed in the electrode positioning grooves 401 by an electrode pressure plate 402. The electrode fixing plate is fixedly connected to the feed assembly 3 by bolts.

[0047] The electrode head fixing plate 4 includes a fixing part 403 and a grinding part 404. The fixing part 403 is fixedly connected to the feed assembly 3. The fixing part 403 has several through holes and is fixedly connected to the feed assembly 3 by bolts to achieve the positioning of the electrode positioning plate. The positive electrode positioning groove 405 is provided on the right side of the grinding part 404, and the negative electrode positioning groove 406 is provided on the left side of the grinding part 404. The positive electrode positioning groove 405 engages with the positive electrode pressure plate 407, and the negative electrode positioning groove 406 engages with the negative electrode pressure plate 408.

[0048] In this embodiment, the positive electrode positioning groove 405 is set perpendicular to the feeding direction of the feeding component 3, and the side of the positive electrode head can be polished by the belt sander 5; the negative electrode positioning groove 406 is set at an angle α with the positive electrode positioning groove 405, and this angle α corresponds to the end bevel of the negative electrode head. The electrode positioning plate has a polishing groove 410, and the open ends of the positive electrode positioning groove 405 and the negative electrode positioning groove 406 are located in the polishing groove 410. The positive electrode head and the negative electrode head are fixed on the electrode head positioning plate respectively, and the welding ends of the two electrode heads are located in the polishing groove 410.

[0049] In this embodiment, the included angle α between the negative electrode positioning groove 406 and the positive electrode positioning groove 405 is 30°.

[0050] The widths of the positive electrode positioning groove 405 and the negative electrode positioning groove 406 are set according to the width of the electrode head connector, which can limit the degree of freedom of the electrode head in the width direction. The positive electrode positioning groove 405 and the negative electrode positioning groove 406 are respectively designed to be open at one end and closed at the other end along the length direction, with a reserved hole 409 at the closed end. The reserved hole 409 is located at the two corners of the closed end, forming an independent platform at the end of the closed end, which abuts against the end of the electrode head connector, thus limiting the degree of freedom of the electrode head along its length direction. The reserved hole 409 can prevent the closed end from colliding with the bottom edge of the electrode head connector, or prevent mispositioning due to the presence of foreign objects. Taking the negative electrode head as an example, place the connector of the electrode head into the negative electrode positioning groove 406, and ensure that the end of the connector is in contact with the bottom of the groove. Since there is a certain tolerance between the width of the negative electrode positioning groove 406 and the width of the connector of the negative electrode head in actual manufacturing, ensure that the surface of the negative electrode head to be ground faces the grinding surface of the belt sander 5, and that the side of the connector away from the surface to be ground is in close contact with the opposite side of the negative electrode positioning groove 406. Finally, fasten the negative electrode pressure plate 408 to the negative electrode positioning groove 406 with bolts to press the negative electrode head firmly, completing the positioning. The positive electrode head is positioned similarly.

[0051] In this embodiment, the feed assembly 3 includes a base 301 and a slide 302. The slide 302 is slidably connected to the base 301. The slide 302 has a trapezoidal mating surface 303, and the base 301 has a trapezoidal mating groove 304. The trapezoidal mating surface and the trapezoidal mating groove 304 are slidably mated. A feed knob 305 and a locking knob 306 are provided on the side of the base 301. The feed knob 305 mates with the trapezoidal mating surface 303. The trapezoidal mating groove 304 has a reserved groove 307 near the locking knob 306. The locking knob 306 passes through the reserved groove 307 and abuts against the reserved groove 307 near the trapezoidal mating groove 304. The feed direction of the feed assembly 3 is perpendicular to the grinding surface of the belt sander 5. The trapezoidal mating surface 303 and the trapezoidal mating groove 304 of the feed assembly 3 can ensure the stable connection of the feed assembly 3 and the stable and accurate feed direction.

[0052] During the grinding of the electrode head, the feed knob 305 needs to be manually operated to bring the grinding groove 410 closer to the grinding surface of the belt sander 5 or retract it. The locking knob 306 is screwed to the base 301. When the locking knob 306 is rotated, the part of the locking knob 306 located in the reserved groove 307 can further press against the trapezoidal mating groove 304 and the trapezoidal mating surface 303, so that the sliding fit between the slide table 302 and the base 301 is locked.

[0053] In this embodiment, the positive and negative electrode heads mentioned require a welding device to fix them during the actual welding process. The welding surfaces of the positive and negative electrode heads must be aligned and substantially parallel. When welding the product, the welding device moves the two electrode heads closer together to clamp the product for welding. Since the two welding heads need to maintain substantially parallel welding surfaces during operation, the included angle between the positive positioning groove 405 and the negative positioning groove 406 must be equal to the included angle formed by the two welding heads in their working state. This ensures that after grinding, the two electrode heads remain substantially parallel when installed on the welding device, guaranteeing the welding effect.

[0054] The above description is a preferred embodiment of the present utility model, used to illustrate the present utility model and its effects. It should be noted that, for those skilled in the art, for the purpose of making foreseeable improvements and modifications without departing from the principles of the present utility model, such improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A quick grinding fixture for resistance welding electrode heads, characterized in that, It includes a first positioning plate and a second positioning plate that are connected to each other. The first positioning plate is vertically arranged and the second positioning plate is horizontally arranged. The second positioning plate is connected to a grinding assembly. The grinding assembly includes a feeding assembly and an electrode head fixing plate. The electrode head fixing plate is provided with at least two electrode positioning grooves, which engage with an electrode pressure plate.

2. The rapid grinding fixture for resistance welding electrode heads according to claim 1, characterized in that, The electrode head fixing plate includes a fixing part and a grinding part. The fixing part is fixedly connected to the feeding assembly. The grinding part is provided with a positive electrode positioning groove and a negative electrode positioning groove. The positive electrode positioning groove engages with the positive electrode pressure plate, and the negative electrode positioning groove engages with the negative electrode pressure plate.

3. The rapid grinding fixture for resistance welding electrode heads according to claim 2, characterized in that, The positive electrode positioning groove is set in a direction perpendicular to the feeding direction of the feeding component, and the negative electrode positioning groove is set in a direction with an angle α to the positive electrode positioning groove, wherein 15°≤a≤45°.

4. A rapid grinding fixture for resistance welding electrode heads according to claim 2 or 3, characterized in that, The positive electrode positioning groove and the negative electrode positioning groove are respectively configured to have one end open and the other end closed along the length direction, and the closed end is provided with a reserved hole.

5. The rapid grinding fixture for resistance welding electrode heads according to claim 4, characterized in that, The electrode head fixing plate has a grinding groove, and the opening ends of the positive electrode positioning groove and the negative electrode positioning groove are located in the grinding groove.

6. The rapid grinding fixture for resistance welding electrode heads according to claim 1, characterized in that, The first positioning plate and the second positioning plate are L-shaped.

7. The rapid grinding fixture for resistance welding electrode heads according to claim 1, characterized in that, The feeding assembly includes a base and a slide, the slide being slidably connected to the base, the slide having a trapezoidal mating surface, and the base having a trapezoidal mating groove, the trapezoidal mating surface and the trapezoidal mating groove being slidably mated.

8. The rapid grinding fixture for resistance welding electrode heads according to claim 7, characterized in that, The base has a feed knob and a locking knob on its side. The feed knob mates with the trapezoidal mating surface. The trapezoidal mating groove has a reserved groove on the side near the locking knob. The locking knob passes through the reserved groove and abuts against the reserved groove on the side near the trapezoidal mating groove.

9. A rapid grinding fixture for resistance welding electrode heads according to claim 7, characterized in that, The second positioning plate is connected to the feed assembly via an adapter plate, and the adapter plate is bolted to the second positioning plate.

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