Solder resist device

Abstract

The utility model provides a resistance welding device which comprises a graphite plate used for containing a workpiece, a negative electrode body and a positive electrode, the negative electrode body and the positive electrode are arranged above the graphite plate, and the positive electrode is used for making contact with the workpiece placed on the graphite plate during welding; and the negative electrode main body is in contact with the graphite plate to form electrical connection, so that the negative electrode main body serves as a negative electrode in the welding process. According to the graphite plate, after the graphite plate and the cathode body are connected together, the graphite plate serves as a cathode, the graphite plate can enable current to be more evenly distributed on a workpiece in the welding process, the problem that the workpiece is broken down due to the fact that the current is too concentrated is solved, the welding quality is improved, the service life of the workpiece is prolonged, and the welding quality is improved. The negative electrode function is achieved through the graphite plate, so that a certain distance is kept between the negative electrode main body and the workpiece, the negative electrode main body and the workpiece are prevented from being fused together in the welding process, the cleaning work after welding is simplified, and the appearance and the use performance of the workpiece are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance welding, in particular to a resistance welding device. Background Art

[0002] Resistance welding refers to a method of locally heating the weldment by using the resistance heat generated by the current passing through the weldment and the contact point as a heat source, and simultaneously applying pressure for welding. During welding, no filler metal is required, the productivity is high, the weldment deformation is small, and automation is easy to achieve. Resistance welding is a method of heating the workpiece contact surface and adjacent areas using the resistance heat effect generated by the current flowing through the workpiece to melt or plastic state, thereby forming a metal bond.

[0003] With the rapid development of the electronics industry, resistance welding technology plays an increasingly important role in the manufacturing process of electronic products. However, traditional solder resist devices often have problems with product breakdown and cathode fusion during the welding process. These problems not only affect the welding quality, but may also cause product damage and reduced production efficiency. Therefore, we make improvements to this and propose a solder resist device. Summary of the invention

[0004] The utility model aims to solve the problem that the existing solder resist device often has product breakdown and negative electrode fusion during the welding process.

[0005] In order to achieve the above-mentioned purpose of the invention, the utility model provides a solder resist device to improve the above-mentioned problem.

[0006] The specific application is as follows:

[0007] A solder resist device comprises a graphite plate for placing a workpiece, and a negative electrode body and a positive electrode arranged above the graphite plate, wherein the positive electrode is used to contact the workpiece placed on the graphite plate during welding; the negative electrode body contacts the graphite plate to form an electrical connection so that the negative electrode body acts as a negative electrode during welding.

[0008] As a preferred technical solution of the present application, the positive electrode is made of metal tungsten.

[0009] As a preferred technical solution of the present application, a driving mechanism is provided between the graphite plate and the negative electrode body and the positive electrode, and the driving mechanism is used for supporting the graphite plate and driving the negative electrode body and the positive electrode to rise and fall.

[0010] As a preferred technical solution of the present application, the driving mechanism includes a base frame, an insulating support platform is fixedly installed on the top of the base frame, and the graphite plate is placed on the top of the insulating support platform.

[0011] As a preferred technical solution of the present application, a column is fixedly installed on one side of the top of the base frame, and a clamping seat and a connecting seat are respectively provided on both sides of the column. The clamping seat and the connecting seat are fixed by bolts, and a hydraulic cylinder is installed on the side of the connecting seat away from the clamping seat.

[0012] As a preferred technical solution of the present application, the piston rod of the hydraulic cylinder is fixedly connected to a lifting plate, and two connecting rods are inserted and connected to the lifting plate. The bottom ends of the two connecting rods are fixedly connected to connecting blocks, and the sides of the two connecting blocks close to each other are fixedly connected to a first clamping plate.

[0013] As a preferred technical solution of the present application, the two first clamps are connected to each other with a second clamp by bolts on one side thereof, the negative electrode body is clamped between one of the first clamps and the second clamp, and the positive electrode is clamped between the other first clamp and the second clamp.

[0014] As a preferred technical solution of the present application, the negative electrode body and the positive electrode are lifted and lowered under the drive of the hydraulic cylinder to achieve contact and separation between the negative electrode body and the graphite plate, and to achieve contact and separation between the positive electrode and the workpiece.

[0015] As a preferred technical solution of the present application, a threaded rod is fixedly connected to the top end of the connecting rod, and an adjusting disk is threadedly connected to the outer surface of the threaded rod.

[0016] As a preferred technical solution of the present application, a spring is sleeved on the outer surface of the threaded rod, and the spring is in contact with the bottom of the adjusting disk and the top of the lifting plate.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the scheme of this application:

[0019] In order to solve the problems of product breakdown and negative electrode fusion that often occur in the welding process of the solder resistance device in the prior art, the present application sets a graphite plate. After the graphite plate is connected to the negative electrode body, the graphite plate acts as the negative electrode function. The graphite plate can make the current more evenly distributed on the workpiece during welding, avoiding the problem of workpiece breakdown caused by excessive current concentration. This not only improves the welding quality, but also extends the service life of the workpiece. The negative electrode function is achieved by the graphite plate, so that a certain distance is maintained between the negative electrode body and the workpiece, avoiding the two from fusing together during the welding process, which not only simplifies the cleaning work after welding, but also ensures the appearance and performance of the workpiece. Since the graphite plate has high temperature stability, even if a large amount of heat is generated during the welding process, the graphite plate is not easy to melt or deform, thereby avoiding the problem of fusion with the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A schematic diagram of the structure of the solder resist device provided in this application;

[0021] Figure 2 A schematic diagram of the structure of a graphite plate of a solder resist device provided in this application;

[0022] Figure 3 A schematic diagram of the structure of the driving mechanism of the solder resist device provided in this application;

[0023] Figure 4 A schematic diagram of the structure of the threaded rod of the solder resist device provided in this application;

[0024] Figure 5 The solder resist device provided in this application Figure 3 Schematic diagram of the structure viewed from above.

[0025] Indicated in the figure:

[0026] 1. Graphite plate; 2. Negative electrode body; 3. Positive electrode; 4. Driving mechanism; 401. Base frame; 402. Insulating support platform; 403. Column; 404. Clamp seat; 405. Connecting seat; 406. Hydraulic cylinder; 407. Lifting plate; 408. Connecting rod; 409. Threaded rod; 410. Adjusting disk; 411. Spring; 412. Connecting block; 413. First clamping plate; 414. Second clamping plate. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] As described in the background technology, with the rapid development of the electronics industry, resistance welding technology plays an increasingly important role in the manufacturing process of electronic products. However, traditional solder resist devices often have problems with product breakdown and cathode fusion during the welding process, which not only affect the welding quality, but also may cause product damage and reduced production efficiency.

[0029] In order to solve this technical problem, the utility model provides a solder resist device.

[0030] Specifically, please refer to Figure 1-Figure 2 , the solder resist device specifically includes:

[0031] A graphite plate 1 for placing a workpiece, and a negative electrode body 2 and a positive electrode 3 arranged above the graphite plate 1, the positive electrode 3 is used to contact the workpiece placed on the graphite plate 1 during welding; the negative electrode body 2 contacts the graphite plate 1 to form an electrical connection so that the negative electrode body 2 acts as a negative electrode during the welding process.

[0032] The soldering resistance device provided by the utility model has a graphite plate 1, and after the graphite plate 1 is connected with the negative electrode body 2, the graphite plate 1 acts as a negative electrode. The graphite plate 1 can make the current more evenly distributed on the workpiece during welding, avoiding the problem of workpiece breakdown caused by excessive current concentration, which not only improves the welding quality, but also prolongs the service life of the workpiece. The negative electrode function is achieved by the graphite plate 1, so that a certain distance is maintained between the negative electrode body 2 and the workpiece, avoiding the two from fusing together during welding, which not only simplifies the cleaning work after welding, but also ensures the appearance and performance of the workpiece; because the graphite plate 1 has high temperature stability, even if a large amount of heat is generated during welding, the graphite plate 1 is not easy to melt or deform, thereby avoiding the problem of fusing with the product.

[0033] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] Example 1, please refer to Figure 1-Figure 2 A solder resist device comprises a graphite plate 1 for placing a workpiece, and a negative electrode body 2 and a positive electrode 3 arranged above the graphite plate 1, wherein the positive electrode 3 is used to contact the workpiece placed on the graphite plate 1 during welding; the negative electrode body 2 contacts the graphite plate 1 to form an electrical connection so that the negative electrode body 2 acts as a negative electrode during the welding process; to prevent the workpiece from being broken down due to excessive current concentration, and the negative electrode of the negative electrode body 2 from fusing with the workpiece.

[0037] Furthermore, the positive electrode 3 is made of metal tungsten, and the melting point of tungsten is 3410 degrees Celsius. The graphite plate 1 is made of graphite, and the melting point of graphite is about 3650 degrees Celsius. This application should be applied to the welding of stainless steel products, such as stainless steel mesh. The melting point of stainless steel products is generally between 1300-1500 degrees Celsius, thus avoiding the product and the graphite plate 1 and the positive electrode 3 from being welded together.

[0038] For the convenience of description and understanding, this application uses A to represent the workpiece after welding, and workpiece A is composed of raw materials A1 and raw materials A2. Workpiece A, raw materials A1 and raw materials A2 are all marked in the figure. During welding, after the negative electrode body 2 is in contact with the graphite plate 1, the raw material A2 is placed on the top of the graphite plate 1 but not in contact with the negative electrode body 2, and then the raw material A1 is placed on the raw material A2, and then the positive electrode 3 is in contact with the top of the raw material A2 for resistance welding.

[0039] Embodiment 2 further optimizes the solder resist device provided in Embodiment 1. Specifically, Figure 3-Figure 5 As shown, a driving mechanism 4 is provided between the graphite plate 1 and the negative electrode body 2 and the positive electrode 3. The driving mechanism 4 is used to support the graphite plate 1 and drive the negative electrode body 2 and the positive electrode 3 to rise and fall to meet the welding requirements of the workpiece.

[0040] Further, such as Figure 3 and Figure 5 As shown, the driving mechanism 4 includes a base frame 401, an insulating support platform 402 is fixedly installed on the top of the base frame 401, and the graphite plate 1 is placed on the top of the insulating support platform 402. The base frame 401 and the insulating support platform 402 cooperate with each other to manufacture the graphite plate 1.

[0041] Further, such as Figure 3 As shown, a column 403 is fixedly installed on one side of the top of the base frame 401, and a clamping seat 404 and a connecting seat 405 are respectively provided on both sides of the column 403. The clamping seat 404 and the connecting seat 405 are fixed by bolts, and a hydraulic cylinder 406 is installed on the side of the connecting seat 405 away from the clamping seat 404. The hydraulic cylinder 406 can be supported by the mutual cooperation of the column 403, bolts, the connecting seat 405 and the clamping seat 404.

[0042] Further, such as Figure 3 As shown, the piston rod of the hydraulic cylinder 406 is fixedly connected to the lifting plate 407, and two connecting rods 408 are inserted and connected to the lifting plate 407. The bottom ends of the two connecting rods 408 are fixedly connected to the connecting blocks 412, and the sides of the two connecting blocks 412 close to each other are fixedly connected to the first clamping plate 413. The connecting rods 408 are preferably rectangular rods to reduce the rotation of the connecting blocks 412.

[0043] Further, such as Figure 3-Figure 4 As shown, the sides of the two first clamping plates 413 close to each other are connected with the second clamping plate 414 by bolts, the negative electrode body 2 is clamped between one of the first clamping plates 413 and the second clamping plate 414, and the positive electrode 3 is clamped between the other first clamping plate 413 and the second clamping plate 414. After unscrewing the bolts connecting the first clamping plate 413 and the second clamping plate 414, the negative electrode body 2 and the positive electrode 3 can be removed.

[0044] Furthermore, the negative electrode body 2 and the positive electrode 3 are lifted and lowered under the drive of the hydraulic cylinder 406 to achieve contact and separation between the negative electrode body 2 and the graphite plate 1, and to achieve contact and separation between the positive electrode 3 and the workpiece.

[0045] Embodiment 3 further optimizes the solder resist device provided in Embodiment 2. Specifically, Figure 3-Figure 4 As shown, a threaded rod 409 is fixedly connected to the top of the connecting rod 408 , and an adjusting disk 410 is threadedly connected to the outer surface of the threaded rod 409 . The adjusting disk 410 can rotate on the outer surface of the threaded rod 409 to move up and down.

[0046] Further, such as Figure 3-Figure 4 As shown, a spring 411 is sleeved on the outer surface of the threaded rod 409, and the spring 411 contacts the bottom of the adjustment disk 410 and the top of the lifting plate 407. When the negative electrode body 2 and the positive electrode 3 are lowered and contact the graphite plate 1 and the workpiece respectively, the spring 411 can buffer the contact force to reduce damage to the components.

[0047] The use process of the solder resist device provided by the utility model is as follows:

[0048] This application uses A to represent the workpiece after welding, and workpiece A is composed of raw materials A1 and A2. Workpiece A, raw materials A1 and A2 are all marked in the figure. During welding, raw material A2 is placed on the top of the graphite plate 1, and then raw material A1 is placed on raw material A2. The lifting plate 407 is pushed down by the hydraulic cylinder 406, so that the negative electrode body 2 and the positive electrode 3 are respectively in contact with the graphite plate 1 and the raw material A2 for resistance welding. After the welding is completed, the hydraulic cylinder 406 drives the negative electrode body 2 and the positive electrode 3 to rise through the lifting plate 407 and other structures.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A solder resist device, characterized in that: The invention comprises a graphite plate (1) for placing a workpiece, and a negative electrode body (2) and a positive electrode (3) arranged above the graphite plate (1); the positive electrode (3) is used to contact the workpiece placed on the graphite plate (1) during welding; the negative electrode body (2) contacts the graphite plate (1) to form an electrical connection, so that the negative electrode body (2) acts as a negative electrode during the welding process.

2. A solder resist device according to claim 1, characterized in that: The positive electrode (3) is made of metal tungsten.

3. A solder resist device according to claim 2, characterized in that: A driving mechanism (4) is provided between the graphite plate (1) and the negative electrode body (2) and the positive electrode (3); the driving mechanism (4) is used to support the graphite plate (1) and drive the negative electrode body (2) and the positive electrode (3) to rise and fall.

4. A solder resist device according to claim 3, characterized in that: The driving mechanism (4) comprises a base frame (401), an insulating support platform (402) is fixedly mounted on the top of the base frame (401), and the graphite plate (1) is placed on the top of the insulating support platform (402).

5. A solder resist device according to claim 4, characterized in that: A column (403) is also fixedly mounted on one side of the top of the base frame (401), and a clamping seat (404) and a connecting seat (405) are respectively arranged on both sides of the column (403). The clamping seat (404) and the connecting seat (405) are fixed by bolts, and a hydraulic cylinder (406) is installed on the side of the connecting seat (405) away from the clamping seat (404).

6. A solder resist device according to claim 5, characterized in that: The piston rod of the hydraulic cylinder (406) is fixedly connected to a lifting plate (407), and two connecting rods (408) are inserted and connected to the lifting plate (407). The bottom ends of the two connecting rods (408) are fixedly connected to a connecting block (412), and the two connecting blocks (412) are fixedly connected to a first clamping plate (413) on the sides close to each other.

7. A solder resist device according to claim 6, characterized in that: The two first clamping plates (413) are connected to a second clamping plate (414) on one side thereof close to each other by bolts; the negative electrode body (2) is clamped between one of the first clamping plates (413) and the second clamping plate (414); and the positive electrode (3) is clamped between the other first clamping plate (413) and the second clamping plate (414).

8. A solder resist device according to claim 7, characterized in that: The negative electrode body (2) and the positive electrode (3) are lifted and lowered under the drive of the hydraulic cylinder (406) to achieve contact and separation between the negative electrode body (2) and the graphite plate (1), and to achieve contact and separation between the positive electrode (3) and the workpiece.

9. A solder resist device according to claim 8, characterized in that: The top end of the connecting rod (408) is fixedly connected to a threaded rod (409), and the outer surface of the threaded rod (409) is threadedly connected to an adjustment disk (410).

10. A solder resist device according to claim 9, characterized in that: A spring (411) is sleeved on the outer surface of the threaded rod (409), and the spring (411) is in contact with the bottom of the adjustment disk (410) and the top of the lifting plate (407).

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