A split structure of a probe current pin, its welding equipment and welding process

Abstract

The present invention discloses a split structure of a probe current needle, its welding equipment, and welding process. The split structure of the probe current needle includes a current needle rod portion and a current needle head portion. A round hole is formed on one end surface of the current needle head portion, and a groove is formed on the side wall of the round hole. A first friction surface matching the bottom wall of the groove is provided on one end surface of the current needle rod portion, and a convex portion is formed by frictionally squeezing the first friction surface and the bottom wall of the groove. Compared with the prior art, the split structure of a probe current needle, its welding equipment, and welding process of the present invention can greatly enhance the connection strength between the current needle head portion and the current needle rod portion, increase the connection tightness at the connection between the current needle head portion and the current needle rod portion, thereby improving the conductivity between the current needle head portion and the current needle rod portion. It can also reduce the cumbersome steps of processing the current needle head portion and the current needle rod portion, save costs, and meet the requirements of mass production.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery testing, and particularly relates to a split structure of a probe current needle, its welding equipment, and welding process. Background Art

[0002] During the processes of formation and grading, the role of the battery probe is to serve as a connecting body between the transmission wire and the battery tab. There are fine needles on its end face, and by piercing the oxide layer on the surface of the battery tab, a lower resistance is achieved for current transmission.

[0003] The traditional probe current needle component is an integral structure. Due to the hardness requirement of the probe head and the conductivity requirement of the probe rod, it is impossible to meet the requirements with one material or it is a split lock structure. The strength at the connection between the current needle head and the rod is not high, and the conductivity is not ideal enough. Moreover, the processing of the above probes is relatively cumbersome and costly, and cannot meet the requirements of large-scale production.

[0004] The information disclosed in this background art section is only intended to enhance the overall understanding of the present invention and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a split structure of a probe current needle, its welding equipment, and welding process, which can greatly enhance the connection strength between the current needle head and the current needle rod, increase the connection tightness at the connection between the current needle head and the current needle rod, thereby improving the conductivity between the current needle head and the current needle rod, and can also reduce the cumbersome steps of processing the current needle head and the current needle rod, save costs, and meet the requirements of large-scale production.

[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the present invention is as follows:

[0007] A split structure of a probe current needle includes a current needle rod portion and a current needle head portion. A round hole is provided on one end face of the current needle head portion, and a groove is provided on the side wall of the round hole. A first friction surface matching the bottom wall of the groove is provided on one end face of the current needle rod portion, and a convex portion is formed by frictionally squeezing the first friction surface and the bottom wall of the groove.

[0008] In one or more embodiments of the present invention, the convex portion and the current needle rod portion are in a T shape.

[0009] A welding device for a split structure of a probe current needle, the welding device for the split structure of the probe current needle comprising a base, an oil cylinder and a top plate. The oil cylinder is arranged between the base and the top plate. A second clamping block is rotatably connected to the upper end surface of the base. A first clamping block matching the second clamping block is rotatably connected to the opposite surface of the upper end surface of the top plate and the base. The first clamping block is in interference fit with the head of the current needle, and the second clamping block is in interference fit with the rod portion of the current needle.

[0010] In one or more embodiments of the present invention, a first motor for driving the first clamping block is fixedly connected to the upper end surface of the top plate.

[0011] In one or more embodiments of the present invention, a third motor for driving the second clamping block is arranged inside the base.

[0012] In one or more embodiments of the present invention, the split structure of the probe current needle is a hollow structure, and a cleaning component for processing the convex part is arranged inside the first clamping block.

[0013] In one or more embodiments of the present invention, the cleaning component comprises an electric push rod and a second motor. The second motor is fixedly connected inside the first clamping block. The second motor can drive the electric push rod to rotate. One end of the electric push rod away from the second motor is movably connected with a cutting knife, and a cutting part is arranged on the cutting knife.

[0014] In one or more embodiments of the present invention, a polishing layer is arranged on the outer wall of the cutting knife.

[0015] In one or more embodiments of the present invention, a through hole matching the split structure of the probe current needle is arranged on the second clamping block, a sliding groove communicated with the through hole is arranged on the base, and a storage bin is slidably connected inside the through hole.

[0016] A welding process for preparing a split structure of a probe current needle, comprising the following steps:

[0017] S1. Prepare the rod portion of the current needle and the head of the current needle;

[0018] S2. Use the welding device according to any one of claims 3 to 9, clamp the head of the current needle in the [first clamping block], clamp the rod portion of the current needle in the second clamping block, and make the first friction surface and the second friction surface contact through the oil cylinder;

[0019] S3. Start the first motor and the third motor simultaneously, make the first motor and the third motor rotate in opposite directions, and the oil cylinder applies pressure to the rod portion of the current needle and the head of the current needle at the same time until the first friction surface softens. After the first friction surface softens, the pressure formed by the oil cylinder can make the softened part rush into the groove;

[0020] After the connection between the current needle rod part and the current needle head part solidifies, the welding is completed.

[0021] Compared with the prior art, the split structure of the probe current needle, its welding equipment and welding process of the present invention can greatly enhance the connection strength between the current needle head part and the current needle rod part, increase the connection tightness at the connection between the current needle head part and the current needle rod part, thereby improving the electrical conductivity between the current needle head part and the current needle rod part, and can also reduce the cumbersome steps of processing the current needle head part and the current needle rod part, save costs, and meet the requirements of large-scale production. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a split structure of a probe current needle in an embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of a novel current needle head in an embodiment of the present invention;

[0025] Figure 3 It is a cross-section of a split structure of a probe current needle in an embodiment of the present invention Figure 1 ;

[0026] Figure 4 It is a cross-section of a split structure of a probe current needle in an embodiment of the present invention Figure 2 ;

[0027] Figure 5 It is a front view of a novel welding equipment in an embodiment of the present invention;

[0028] Figure 6 It is a schematic structural diagram of a novel welding equipment in an embodiment of the present invention Figure 1 ;

[0029] Figure 7 It is a schematic structural diagram of a novel welding equipment in an embodiment of the present invention Figure 2 ;

[0030] Figure 8 It is a cross-sectional view of a novel welding equipment in an embodiment of the present invention;

[0031] Figure 9 It is Figure 8 a schematic structural diagram of the structure at A in

[0032] Description of main reference numerals:

[0033] 1. Current needle rod; 101. convex part; 2. current needle head; 201. round hole; 202. groove; 3. base; 301. slide groove; 4. oil cylinder; 5. top plate; 6. first motor; 7. first clamping block; 8. cleaning assembly; 801. electric push rod; 802. second motor; 803. cutter; 8031. cutting part; 804. grinding layer; 9. second clamping block; 901. through hole; 10. storage compartment; 11. third motor. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] A probe current needle split structure and its welding equipment and welding process in one embodiment of the present invention include a probe current needle split structure and a welding equipment for the probe current needle split structure, and the welding equipment is used to weld the probe current needle split structure.

[0036] like Figures 1 to 4 As shown, the probe current needle split structure includes a current needle rod portion 1 and a current needle head portion 2, a circular hole 201 is opened on one end surface of the current needle head portion 2, a groove 202 is opened on the side wall of the circular hole 201, a first friction surface matching the bottom wall of the circular hole 201 is arranged on one end surface of the current needle rod portion 1, and the bottom wall of the circular hole 201 is the second friction surface, the current needle rod portion 1 and the current needle head portion 2 can rotate so that the first friction surface and the second friction surface rub against each other, and the heat generated by the friction causes the first friction surface to melt, and then the current needle rod portion 1 and the current needle head portion 2 are squeezed, so that a convex portion 101 matching the groove 202 is formed on the first friction surface to achieve fixation between the current needle rod portion 1 and the current needle head portion 2, and at the same time, the first friction surface and the second friction surface can fit tightly.

[0037] The split structure of the probe current needle aims to change the traditional one-piece vehicle processing and the split locking structure, where the strength of the connection is not high and the processing is relatively complex. The split structure of the probe current needle adopts a friction welding process, which separates the processing of the current needle head and the rod part and uses different copper materials to balance hardness and conductivity, reduce the processing difficulty, and improve the test accuracy. Different from other locking or riveting methods, the split structure of the probe current needle provides a friction welding connection structure that can effectively connect the head and the rod, improve the strength, and ensure the conductivity at the connection between the current needle rod part 1 and the current needle head part 2.

[0038] Furthermore, the current needle head part 2 uses a high-hardness and high-conductivity material. A round hole 201 is machined on the current needle head part 2, and a groove 202 is machined on the side wall of the round hole 201. The current needle rod part 1 uses a high-conductivity material. The first friction surface is machined into a cylindrical shape. The first friction surface is a plane, and a small-angle chamfer is machined on the first friction surface for the welding quality in the middle. During friction welding, the cylindrical part of the current needle rod part 1 is inserted into the round hole 201 of the current needle head part 2, and then friction welding is carried out. During friction welding, the melting point of the current needle rod part 1 is relatively low, that is, the melting point at the first friction surface is low. The first friction surface will soften and deform first. During friction welding, the rear end of the current needle rod part 1 will be subjected to a forward pressure, and the softened part will rush into the groove 202 of the current needle head part 2 to realize the connection between the current needle rod part 1 and the current needle head part 2. In this connection method, in addition to the welded connection, a convex part 101 is formed. The convex part 101 and the current needle rod part 1 are in a T shape. The convex part 101 and the groove 202 are in a snap fit, greatly strengthening the connection strength and the stability of the product.

[0039] That is, the welding process for preparing the split structure of the probe current needle can be divided into the following steps: S1, prepare the current needle rod part and the current needle head part; S2, use the welding equipment of the present invention to clamp the current needle head part in the first clamping block and clamp the current needle rod part in the second clamping block, and make the first friction surface and the second friction surface contact through the oil cylinder; S3, start the first motor and the third motor simultaneously, make the first motor and the third motor rotate in opposite directions, and the oil cylinder applies pressure to the current needle rod part and the current needle head part at the same time until the first friction surface softens. After the first friction surface softens, the pressure formed by the oil cylinder can make the softened part rush into the groove; S4, complete the welding after the connection between the current needle rod part and the current needle head part solidifies.

[0040] As Figures 5 to 9As shown, during the welding process of the split structure of the probe current needle, a welding device is used to weld the split structure of the probe current needle. The welding device includes a base 3, an oil cylinder 4, and a top plate 5. The oil cylinder 4 is arranged between the base 3 and the top plate 5. The oil cylinder 4 can adjust the distance between the base 3 and the top plate 5. When there is a split structure of the probe current needle between the base 3 and the top plate 5, the oil cylinder 4 shortens, which can cause the base 3 and the top plate 5 to squeeze the split structure of the probe current needle.

[0041] Specifically, a third motor 11 is arranged inside the base 3. A second clamping block 9 is rotatably connected to the upper end surface of the base 3. The third motor 11 can drive the second clamping block 9. A first clamping block 7 is rotatably connected to the opposite surface of the top plate 5 and the second clamping block 9. A cleaning component 8 for driving the first clamping block 7 is arranged at the upper end of the top plate 5, that is, both the second clamping block 9 and the first clamping block 7 can rotate. The second clamping block 9 is clamped with the current needle head 2, and the second clamping block 9 and the current needle head 2 are in interference fit. The current needle rod part 1 is inserted into the second clamping block 9, and the second clamping block 9 and the current needle rod part 1 are also in interference fit.

[0042] When the welding device is in use, first, the current needle head 2 is clamped in the first clamping block 7, and then the current needle rod part 1 is inserted into the second clamping block 9. After the insertion is completed, the oil cylinder 4 shortens, causing the current needle head 2 and the current needle rod part 1 to contact. The first motor 6 drives the first clamping block 7 to rotate forward, and the third motor 11 drives the second clamping block 9 to rotate backward, causing the first friction surface and the second friction surface to contact and rub, melting the first friction surface, and squeezing the melted part through the shortening of the oil cylinder 4, so that a convex part 101 can be formed and clamped in the groove 202.

[0043] Among them, the third motor 11 and the first motor 6 do not necessarily rotate simultaneously, that is, when the third motor 11 starts, the first motor 6 does not start, and when the first motor 6 starts, the third motor 11 does not start. When the third motor 11 and the first motor 6 start simultaneously, the friction welding speed of the split structure of the probe current needle can be increased to a great extent.

[0044] For the split structure of the probe current needle to save materials, the middle part of the split structure of the probe current needle is hollow. When using the welding device during friction welding, the first friction surface will not only spread towards the groove 202 but also towards the end away from the groove 202. At this time, it is necessary to cut off the convex part 101 at the end away from the groove 202, which can largely avoid the need for secondary treatment of the convex part 101 in subsequent processes and reduce the steps of secondary treatment of the convex part 101.

[0045] As Figures 8 to 9 shown, a cleaning component 8 is arranged inside the first clamping block 7, and the cleaning component 8 is used to process the end of the convex part 101 away from the groove 202.

[0046] Specifically, the cleaning component 8 includes an electric push rod 801 and a second motor 802. The second motor 802 is fixedly connected inside the first clamping block 7. The second motor 802 is used to drive the electric push rod 801 to rotate. A cutting knife 803 is provided at one end of the electric push rod 801 away from the second motor 802. The electric push rod 801 can push the cutting knife 803 to move to the convex portion 101. A cutting portion 8031 is provided on the cutting knife 803. The redundant convex portion 101 can be cut off through the cutting portion 8031. After the cutting is completed, there may still be burrs. At this time, the second motor 802 drives the electric push rod 801 to rotate, and the electric push rod 801 drives the cutting knife 803 to rotate. A polishing layer 804 is provided on the outer wall of the cutting knife 803. The polishing layer 804 and the inner wall of the probe current needle split structure are in interference fit, that is, the polishing layer 804 can friction the burrs on the inner wall of the probe current needle split structure, and the polishing layer 804 can polish the burrs on the inner wall of the probe current needle split structure.

[0047] As Figures 8 to 9 shown, a through hole 901 matching the probe current needle split structure is provided on the second clamping block 9. After the redundant convex portion 101 in the probe current needle split structure is cut off, it will move downward due to gravity and pass through the through hole 901. A sliding groove 301 matching the through hole 901 is provided on the base 3. A storage bin 10 is slidably connected in the sliding groove 301. The cut-off convex portion 101 or the polished convex portion 101 passes through the probe current needle split structure and the through hole 901 in sequence, and finally enters the storage bin 10. The storage bin 10 can collect the redundant convex portion 101 for unified processing.

[0048] When using the welding equipment, first, insert the current needle rod portion 1 into the second clamping block 9, and then clamp the current needle head portion 2 in the first clamping block 7. The oil cylinder 4 is used to make the current needle rod portion 1 and the current needle head portion 2 contact. After the first motor 6 is started, it drives the first clamping block 7 to rotate, and the first clamping block 7 drives the current needle head portion 2 to rotate forward. After the third motor 11 is started, it drives the second clamping block 9 to rotate, and the second clamping block 9 drives the current needle rod portion 1 to rotate backward. The contact surfaces of the current needle rod portion 1 and the current needle head portion 2 friction, and the oil cylinder 4 continuously gives a certain pressure to the probe current needle split structure. After the first friction surface melts, the melted part can enter the groove 202 and solidify to form the convex portion 101. The contact surfaces of the current needle rod portion 1 and the current needle head portion 2 can complete the welding, and the connection strength of the probe current needle split structure can be strengthened through the convex portion 101.

[0049] Among them, after the friction welding is completed, the cleaning component 8 drives the cutting tool 803 to cut off the redundant part of the convex portion 101. The convex portion 101 is rotated by the second motor 802, and the cutting tool 803 rotates with the convex portion 101. The polishing layer 804 on the outer wall of the cutting tool 803 can friction the redundant convex portion 101 to remove the burrs of the cut-off part.

[0050] After the current needle head 2 is inserted into the first clamping block 7, the electric push rod 801 can extend a part so that the cutting tool 803 does not exceed the contact surface between the current needle rod portion 1 and the current needle head 2. The cutting tool 803 plays a role in positioning the current needle head 2, and to a great extent, it ensures that the current needle head 2 is not easily displaced during rotation.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding device for a split structure of a probe current needle, characterized in that the split structure of the probe current needle includes a current needle rod part and a current needle head part. A round hole is provided on one end face of the current needle head part, and a groove is provided on the side wall of the round hole. A first friction surface matching the bottom wall of the groove is provided on one end face of the current needle rod part, and a convex part is formed by friction extrusion between the first friction surface and the bottom wall of the groove; the convex part and the current needle rod part are in a T shape; the welding device for the split structure of the probe current needle includes a base, an oil cylinder and a top plate. The oil cylinder is arranged between the base and the top plate. A second clamping block is rotatably connected to the upper end face of the base, and a first clamping block matching the second clamping block is rotatably connected to the opposite face of the upper end face of the base and the top plate. The first clamping block is in interference fit with the current needle head part, and the second clamping block is in interference fit with the current needle rod part; a first motor for driving the first clamping block is fixedly connected to the upper end face of the top plate; a third motor for driving the second clamping block is arranged inside the base.

2. The welding device for the split structure of the probe current needle according to claim 1, characterized in that The split structure of the probe current needle is a hollow structure, and a cleaning component for processing the convex part is arranged inside the first clamping block.

3. The welding device for the split structure of the probe current needle according to claim 2, characterized in that, The cleaning component includes an electric push rod and a second motor. The second motor is fixedly connected inside the first clamping block. The second motor can drive the electric push rod to rotate. One end of the electric push rod away from the second motor is movably connected with a cutting knife, and a cutting part is provided on the cutting knife.

4. A welding device for a split structure of a probe current needle according to claim 3, characterized in that, A polishing layer is provided on the outer wall of the cutting knife.

5. The welding device for the split structure of the probe current needle according to claim 1, wherein, A through hole matching the split structure of the probe current needle is provided on the second clamping block, a sliding groove communicated with the through hole is provided on the base, and a storage bin is slidably connected inside the through hole.

6. A welding process for preparing a split structure of a probe current needle, characterized in that, Including the following steps: S1. Prepare the current needle rod part and the current needle head part; S2. Use the welding device according to any one of claims 1 to 5, clamp the current needle head part in the first clamping block, clamp the current needle rod part in the second clamping block, and make the first friction surface and the bottom wall of the groove contact through the oil cylinder; S3. Start the first motor and the third motor at the same time, make the first motor and the third motor rotate in opposite directions, and the oil cylinder applies pressure to the current needle rod part and the current needle head part at the same time until the first friction surface is softened. After the first friction surface is softened, the pressure formed by the oil cylinder can make the softened part rush into the groove; S4. After the connection part of the current needle rod part and the current needle head part solidifies, the welding is completed.

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