Automatic-feeding quick pin inserting equipment for IGBT module

Abstract

The invention relates to the technical field of semiconductor packaging, in particular to an automatic-feeding quick pin inserting device for an IGBT (Insulated Gate Bipolar Translator) module, which comprises a three-dimensional rack, a pin material belt, a pin inserting mechanism, a pin cutting mechanism, a cam group, a pin supplying mechanism and a pin clamping mechanism matched with the pin cutting mechanism, the cam group is arranged in the three-dimensional rack and comprises a needle inserting cam for driving the needle inserting mechanism to act, a needle cutting cam for driving the needle cutting mechanism to act and a needle feeding cam for driving the needle clamping mechanism to act; the needle clamping mechanism is matched with the needle cutting mechanism to clamp and cut off a needle material belt; when the needle clamping mechanism acts, the needle supplying mechanism is controlled to intermittently supply a needle material belt, the needle supplying mechanism comprises a material guiding frame, a material supplying groove is formed in the material guiding frame in a penetrating mode, and the needle material belt moves along the material supplying groove; according to the intermittent feeding device for the needle belt, intermittent stable conveying and feeding of the needle belt are additionally achieved by reasonably reducing the using number of the cams.

Description

Technical Field

[0001] This invention relates to the field of semiconductor packaging technology, and more particularly to a fast pin insertion device for IGBT modules with automatic feeding. Background Technology

[0002] The cam pin insertion machine is an automated pin insertion device for IGBT modules. The existing patent publication number CN116598865A discloses a cam cutting pin insertion machine and a terminal cutting and insertion method. In order to realize the fully automated terminal cutting and insertion, the device is equipped with four independent cams on the same rotating shaft: a first cam, a second cam, a third cam, and a fourth cam. These cams drive each component to complete four actions: strip positioning, terminal cutting, primary insertion, and secondary insertion.

[0003] The profile curve of the cam determines the timing and accuracy of the motion. In the cam machining process, high-precision profile machining is required according to the motion law of the corresponding action. Most of these processes require the use of high-end equipment such as five-axis linkage machining centers and precision grinding machines. The relative dimensions of each cam also need to be repeatedly tested and adjusted in conjunction with the equipment. The more cams there are, the higher the processing and manufacturing costs and the more difficult the equipment assembly and debugging become, resulting in high processing and maintenance costs and low efficiency for the pin insertion machine.

[0004] Therefore, there is an urgent need for an automatic feeding device for IGBT modules that can quickly insert pins. By reasonably reducing the number of cams used, the device can achieve intermittent and stable feeding of pins while ensuring the accuracy of pin clamping, cutting and insertion. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic feeding device for IGBT modules with rapid pin insertion, which achieves intermittent and stable feeding of the pin tape by reasonably reducing the number of cams used.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic feeding IGBT module quick pin insertion device, comprising a three-dimensional frame, a pin material strip, a pin insertion mechanism, a pin cutting mechanism, a cam group, a pin supply mechanism, and a pin clamping mechanism adapted to the pin cutting mechanism. The cam assembly is located inside the three-dimensional frame and includes a needle insertion cam that drives the needle insertion mechanism, a needle cutting cam that drives the needle cutting mechanism, and a needle feeding cam that drives the needle clamping mechanism. The needle clamping mechanism works in conjunction with the needle cutting mechanism to clamp and cut the needle material strip; While the needle clamping mechanism is in operation, it controls the needle supply mechanism to intermittently supply needle material.

[0007] As a preferred embodiment of the present invention, the needle feeding mechanism includes a guide frame, and a feeding groove is provided through the guide frame, and the needle material belt moves along the feeding groove; A feeding port is provided on one side of the guide frame. A needle feeding mechanism is movable inside the feeding port. The needle feeding mechanism passes through the feeding port and extends into the feeding groove to push the material intermittently.

[0008] As a preferred embodiment of the present invention, the needle clamping mechanism includes a mating seat that is driven to move horizontally by a needle feeding cam, and a clamping table for clamping the needle material strip is fixedly connected to one end of the mating seat near the needle cutting mechanism. The needle cutting mechanism includes a slide base driven by a needle cutting cam to move horizontally. One end of the slide base is fixedly connected to a needle cutting seat, which corresponds to the clamping table.

[0009] As a preferred embodiment of the present invention, the needle supply mechanism includes a needle supply block, one end of which is set as an inclined surface, and a hinge block is fixedly connected to one end of the needle supply block. A concave clamping block is hinged to the outer side of one end of the hinge block. A hinge groove for the needle supply block to move is opened on the inner side of the concave clamping block. A spring hole is opened in the hinge groove and a spring is provided in the hole. The spring is connected to the hinge block.

[0010] As a preferred embodiment of the present invention, a convex strip with one end protruding is fixedly connected to one side of the mating seat, a rolling wheel is rotatably arranged on the convex strip, a guide strip is rotatably connected to one end of the rolling wheel, a connecting plate is fixedly connected to one end of the guide strip, and the connecting plate is fixedly connected to the concave clamping block. A linear guide mechanism is provided on one side of the connecting plate; The concave clamping block has a countersunk hole at the end away from the convex strip, and a spring is installed in the countersunk hole. One end of the spring is connected to a fixed abutment block.

[0011] As a preferred embodiment of the present invention, the needle feeding mechanism includes a needle feeding roller group, which includes a driving roller and a driven roller, and the two rollers squeeze the needle material strip and feed it intermittently. The active roller and the driven roller are rotatably connected to both sides of the guide frame via shaft brackets, and the guide frame has appropriate openings on both sides.

[0012] As a preferred embodiment of the present invention, a feed disk is coaxially arranged on the top of the drive roller, a plurality of feed teeth are arranged in a ring around the outer periphery of the feed disk, and a paddle block is arranged on one side of the feed disk, with an inclined surface at one end of the paddle block that is adapted to the feed teeth. One end of the lever is fixedly connected to a linkage block, one end of the linkage block is provided with a movable seat, one end of the movable seat is provided with a lever groove, the linkage block is disposed in the lever groove and is hinged to it, and a torsion spring is provided between the two.

[0013] As a preferred embodiment of the present invention, one end of the movable seat is rotatably connected to a second rolling wheel, and a second convex strip is rolled against one side of the second rolling wheel, and the second convex strip is fixed to the mating seat; The top of the movable seat is provided with a linear guide mechanism 2; The movable seat is provided with a fixed abutment block 2 at the end away from the convex strip 2, and a return spring is provided between the two.

[0014] In a preferred embodiment of the present invention, the height of the driving roller and the driven roller is greater than or equal to the height of the needle material strip.

[0015] As a preferred embodiment of the present invention, the end of the cutting needle seat near the needle clamping mechanism is provided with a retractable pressure block, a push rod punch, a limiting fork rod and a slitting blade; The slitting blade and the limiting fork pass through the pressure block and slide with it, and the length of the limiting fork is greater than that of the slitting blade; A slitting base is connected through and fixedly connected inside the clamping table. The slitting base has through openings for corresponding limiting forks and slitting blades. The clamping platform has a through-hole square opening that is compatible with the push rod punch.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By setting a needle insertion cam, a needle cutting cam, and a needle feeding cam, the present invention further reduces the number of cams to be processed compared with the traditional single cam corresponding to a single action scheme, while reducing the complexity of multi-cam coaxial debugging and reducing processing and debugging costs. During the clamping process, the needle feeding mechanism controls the intermittent feeding of the needle supply mechanism, eliminating the need for additional independent drive components, ensuring synchronous operation, and resulting in a compact structure. Attached Figure Description

[0017] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the rapid pin insertion device of the present invention; Figure 2 This is a three-dimensional schematic diagram of the cam assembly of the present invention; Figure 3 yes Figure 1 A magnified view of a portion of region A; Figure 4 This is a three-dimensional schematic diagram of the cutting needle seat of the present invention; Figure 5 This is a three-dimensional schematic diagram of the clamping platform of the present invention; Figure 6 This is a three-dimensional schematic diagram of the needle supply mechanism of the present invention; Figure 7 This is a three-dimensional schematic diagram of the needle supply roller assembly of the present invention; Figure 8 This is a cross-sectional schematic diagram of the needle supply roller assembly of the present invention; Figure 9 This is a three-dimensional schematic diagram of the feed disc and the shift block of the present invention; Figure 10 yes Figure 5 A magnified view of a portion of region B; Figure 11 This is a three-dimensional schematic diagram of the pin insertion mechanism of the present invention; In the diagram: 1. Needle clamping mechanism; 101. Needle feed cam; 102. Mating seat; 103. Clamping table; 104. Convex strip one; 105. Driving roller; 106. Driven roller; 107. Shaft support; 108. Feed plate; 109. Pulley block; 110. Linking block; 111. Moving seat; 112. Rolling wheel two; 113. Convex strip two; 2. Needle cutting mechanism; 201. Needle cutting cam; 204. Needle cutting seat; 205. Slide table seat; 206. Sliding knife; 207. Limiting fork rod; 208. Push rod punch; 209. Sliding base; 210. Through square opening; 211. Pressure block; 3. Pin insertion mechanism; 301. Pin insertion cam; 302. Vertical swing arm; 303. Pin insertion seat; 304. Roller; 305. Pin insertion head; 306. Vertical guide rail; 4. Needle supply block; 401. Concave clamping block; 402. Hinge block; 403. Countersunk hole; 404. Fixed abutment block one; 405. Rolling wheel one; 406. Guide bar; 407. Connecting plate; 5. Needle-shaped material strip; 6. Material guide frame; 601. Material feeding trough; 7. Three-dimensional frame; 8. Linear guide mechanism one; 801. Linear guide mechanism two. Detailed Implementation

[0019] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0020] Please see Figure 1-11 The present invention provides a technical solution: an automatic feeding IGBT module quick pin insertion device, comprising a three-dimensional frame 7, a pin material belt 5, a pin insertion mechanism 3, a pin cutting mechanism 2, a cam group, a pin supply mechanism, and a pin clamping mechanism 1 adapted to the pin cutting mechanism 2. The cam assembly is located inside the three-dimensional frame 7 and includes a needle insertion cam 301 that drives the needle insertion mechanism 3, a needle cutting cam 201 that drives the needle cutting mechanism 2, and a needle feeding cam 101 that drives the needle clamping mechanism 1. The needle clamping mechanism 1, in conjunction with the needle cutting mechanism 2, clamps and cuts the needle material strip 5; While the needle clamping mechanism 1 is in motion, the needle supply mechanism is controlled to intermittently supply the needle material belt 5. like Figure 11 As shown, the pin insertion mechanism 3 includes a double-wheel clamping mechanism, a vertical guide rail 306, and a pin insertion seat 303. The pin insertion cam 301 is configured as an end face cam. The double-wheel clamping mechanism clamps and fits the edge of the end face cam. One end of the double-wheel clamping mechanism is provided with a vertical swing arm 302, and one end of the swing arm is rotatably connected to a roller 304. One end of the pin insertion seat 303 is provided with an adapter groove. The roller 304 moves in the adapter groove. The pin insertion seat 303 rises and falls along the vertical guide rail 306. The bottom of the pin insertion seat is fixedly connected to a pin head 305.

[0021] Specifically, a servo motor drives a cam assembly to rotate inside the three-dimensional frame 7. The rotation of the needle feeding cam 101 drives the needle clamping mechanism 1 to operate, which, in conjunction with the needle cutting mechanism 2, pre-clamps and positions the needle material strip 5. At the same time, the needle clamping mechanism 1 intermittently supplies the needle material strip 5 through mechanical linkage control of the needle feeding mechanism. At this time, the needle clamping mechanism 1, in conjunction with the needle cutting mechanism 2, clamps the needle material strip 5 after it has been fed. During this process, driven by the needle insertion cam 301, the needle insertion head 305 descends and enters the upper part of the needle body through the bottom slot hole for limiting and fixing. Meanwhile, the needle cutting mechanism 2 continues to operate, cutting off the upper terminal connection part of the needle material strip 5 to separate the needle body. Subsequently, the needle clamping mechanism 1 and the needle cutting mechanism reset and unfold, and the needle insertion head 305 can continue to descend to complete the needle insertion work. The double-wheel clamping mechanism clamps the edge of the end face cam and swings with the change of the cam profile, driving the vertical swing arm 302 to move. The roller 304 at one end of the vertical swing arm 302 moves in the adapter groove of the pin holder 303, converting the swing motion of the swing arm into the linear motion of the pin holder 303, so that the pin holder 303 moves up and down along the vertical guide rail 306, and the pin head 305 at its bottom moves up and down synchronously with the pin holder 303 to complete the insertion action of the PIN pin body. In this embodiment, by setting up a needle insertion cam 301, a needle cutting cam 201, and a needle feeding cam 101, compared with the traditional single cam corresponding to a single action, the number of cams to be processed is further reduced, while the complexity of multi-cam coaxial debugging is reduced, and the processing and debugging costs are reduced. Furthermore, by using the needle clamping mechanism 1 to control the needle feeding mechanism to feed intermittently during the clamping action, no additional independent drive components are required, ensuring the synchronization of actions and resulting in a compact structure. Furthermore, the pin insertion cam 301 is set to be an end face cam, which is used in conjunction with the double wheel clamping mechanism for close-fitting transmission. Compared with the single-point contact of the traditional disc cam, it has more uniform force distribution, less vibration when running at high speed, improves the repeatability and accuracy of the pin insertion action, and makes the pin insertion transmission structure stable.

[0022] Based on the above embodiments, the needle feeding mechanism includes a guide frame 6, and a feeding groove 601 is provided through the guide frame 6, and the needle material belt 5 moves along the feeding groove 601. A feeding port is provided on one side of the guide frame 6. A needle feeding mechanism is movable inside the feeding port. The needle feeding mechanism passes through the feeding port and extends into the feeding groove 601 to push the material intermittently.

[0023] In this embodiment, the feeding trough 601 is set to guide the needle material belt 5, and the needle feeding mechanism extends from the feeding port into the feeding trough 601 to push the material, so as to avoid the needle material belt 5 from deviating during the conveying process and ensure the stability of intermittent feeding. Preferably, a wear-resistant bushing is installed inside the feed trough 601 to reduce the friction between the needle material belt 5 and the trough wall, extend the service life of the guide frame 6, and reduce the moving resistance of the needle material belt 5.

[0024] Based on the above embodiments, the needle clamping mechanism 1 includes a mating seat 102 driven to move horizontally by the needle feeding cam 101, and a clamping table 103 for clamping the needle material strip 5 is fixedly connected to one end of the mating seat 102 near the needle cutting mechanism 2. The needle cutting mechanism 2 includes a slide base 205 that is driven to move horizontally by the needle cutting cam 201. One end of the slide base 205 is fixedly connected to a needle cutting seat 204, which corresponds to the clamping table 103. like Figure 6As shown, the top of the mating seat 102 is also provided with an adapter groove, a roller is provided in the groove, a horizontal swing arm is provided at one end of the roller, a return torsion spring is provided at the hinge of the horizontal swing arm, and a roller is provided at one end of the horizontal swing arm to roll in contact with the needle feeding cam 101. The relevant drive structure of the needle cutting mechanism 2 is similar but in the opposite direction.

[0025] Specifically, the rollers of the needle clamping mechanism 1 roll against the contour surface of the needle feeding cam 101, driving the lateral swing arm to swing. Through the cooperation of the rollers with the top adapter groove of the mating seat 102, the swing motion is converted into the horizontal linear displacement of the mating seat 102, and the clamping table 103 moves horizontally synchronously with the mating seat 102. The rollers of the needle cutting mechanism 2 roll against the contour surface of the needle cutting cam 201, converting the cam rotation motion into the horizontal linear displacement of the slide table 205. The needle cutting seat 204 moves horizontally synchronously with the slide table 205, and the direction of movement is opposite to that of the mating seat 102. The clamping table 103 and the needle cutting seat 204 cooperate to complete the clamping of the needle material strip 5. In this embodiment, the clamping table 103 is set to move horizontally in correspondence with the needle cutting seat 204 to ensure that the needle material strip 5 is centered when it is clamped, to avoid the position of the insert needle head 305 being offset, and to ensure the accuracy of the needle insertion operation. Preferably, the roller is made of hard alloy and mirror polished, and the cam profile is carburized, quenched and finely ground to improve the wear resistance of both and extend the service life of the cam assembly. Preferably, both the mating seat 102 and the slide seat 205 are provided with linear guide rails to reduce the clearance error of horizontal displacement and improve the moving accuracy of clamping and cutting. Preferably, the fit clearance between the adapter groove and the roller is set to 0.01~0.02mm to eliminate transmission clearance, avoid lag during power transmission, and ensure displacement accuracy.

[0026] Based on the above embodiments, the end of the cutting needle seat 204 near the needle clamping mechanism 1 is provided with a retractable pressure block 211, a push rod punch 208, a limiting fork rod 207 and a slitting blade 206; The slitting blade 206 and the limiting fork 207 pass through the pressure block 211 and slide with it. The length of the limiting fork 207 is greater than that of the slitting blade 206. A slitting base 209 is fixedly connected through the clamping table 103, and a through opening is provided on the slitting base 209 for a corresponding limiting fork 207 and a slitting blade 206. The clamping table 103 has a through square opening 210 that is compatible with the push rod punch 208.

[0027] Specifically, the needle cutter 204 moves horizontally towards the clamping table 103. The pressure block 211 first contacts the clamping table 103 to clamp the needle material strip 5. The spring inside the pressure block 211 is compressed and contracts. Meanwhile, the needle cutter 204 continues to move towards the clamping table 103. The limiting fork 207 first passes through the pressure block 211 and extends out, thereby inserting into the through-hole of the slitting base 209 to limit and support the current needle body. As the needle cutter 204 continues to move, the slitting blade 206 inserts into the through-hole of the slitting base 209 to punch and remove the terminal connection part of the needle material strip 5, completing the separation of the needle body from the needle material strip 5. While the slitting blade 206 is punching, the push rod punch 208 moves with the needle cutter 204 and inserts into the through-hole 210 of the clamping table 103 to remove burrs from the bottom of the next needle body, thereby further ensuring the accuracy and stability of subsequent needle insertion. In this embodiment, the cutting and burr removal are performed sequentially after clamping and limiting, which avoids the needle material strip 5 from shifting during cutting and also avoids the needle body from shaking, thus improving the processing accuracy. Furthermore, the needle cutter 204 can simultaneously complete the clamping of the needle material strip 5, the limiting of the needle body, the cutting of the terminal connection part and the removal of subsequent burrs in a single displacement, without the need for additional processes and drive structures, reducing the processing cycle of a single needle, improving the needle insertion efficiency, and all of these are integrated into the needle cutter 204, resulting in a compact structural layout. Preferably, the slitting blade 206 is made of cemented carbide, and the cutting edge is hardened to improve the wear resistance and smoothness of the cut, thereby extending the service life of the tool.

[0028] Example 1: The present invention provides an embodiment of a needle feeding mechanism, including a needle feeding block 4, one end of the needle feeding block 4 is configured as an inclined surface, a hinge block 402 is fixedly connected to one end of the needle feeding block 4, a concave clamping block 401 is hinged to the outer side of one end of the hinge block 402, a hinge groove for the needle feeding block 4 to move is opened on the inner side of the concave clamping block 401, a spring hole is opened in the hinge groove and a spring is provided in the hole, and the spring is connected to the hinge block 402.

[0029] Specifically, the concave clamping block 401 moves linearly along the displacement direction of the needle material belt 5. The elastic force of the spring pushes the hinge block 402, so that the needle supply block 4 remains extended out of the hinge groove and is locked in the gap of the needle material belt 5, pushing the needle material belt 5 forward synchronously to complete the feeding. Then the concave clamping block 401 resets and moves, the inclined surface of the needle supply block 4 contacts the needle material belt 5 and is squeezed, compressing the spring and causing the hinge block 402 to swing, so that the needle supply block 4 is retracted into the hinge groove to avoid collision. After the concave clamping block 401 resets, it is locked in the gap of the subsequent needle material belt 5, and the intermittent feeding of the needle material belt 5 is completed in a cycle. In this embodiment, the needle supply block 4 is set as a right-angled triangle structure, which makes it easy to be inserted into the gap of the needle material strip 5 to achieve fixed-distance pushing. When resetting, the inclined surface of the needle supply block 4 contacts the needle material strip 5 and can automatically retract into the hinge groove without the need for additional control structure, thus ensuring the accuracy of the feeding pitch. Furthermore, the needle feeding mechanism consists of a needle feeding block 4, a concave clamping block 401, a hinge block 402, and a spring. The whole structure is a small hinge type and does not occupy extra space. Preferably, the concave clamping block 401 is the moving base of the needle feeding mechanism, and moves back and forth in conjunction with the needle clamping mechanism 1. A hinge groove is provided on its inner side for the needle feeding block 4 to move. A spring hole is provided in the hinge groove for installing a spring 1 to facilitate the reset of the needle feeding block 4. Preferably, the angle of the inclined surface of the needle block 4 is 30°~45°, so as to ensure that it can be squeezed and retracted by the needle material belt 5 during reset, and avoid the large avoidance resistance caused by the angle being too small; Preferably, the needle block 4 is made of hard alloy, and the push end and the bevel are polished to reduce friction and wear with the needle strip 5 and extend its service life. Preferably, a polytetrafluoroethylene wear-resistant bushing is provided at the hinge connection between the concave clamping block 401 and the hinge block 402 to reduce oscillation wear and prevent the hinge gap from increasing, which would lead to a decrease in the feeding accuracy.

[0030] Based on the above embodiment, a convex strip 104 with one end protruding is fixedly connected to one side of the mating seat 102. A rolling wheel 405 is rolled on the convex strip 104. A guide strip 406 is rotatably connected to one end of the rolling wheel 405. A connecting plate 407 is fixedly connected to one end of the guide strip 406. The connecting plate 407 is fixedly connected to the concave clamping block 401. A linear guide mechanism 8 is provided on one side of the connecting plate 407; A countersunk hole 403 is provided at the end of the concave clamping block 401 away from the convex strip 104. A spring 2 is provided in the countersunk hole 403, and one end of the spring 2 is connected to a fixed abutment block 404.

[0031] Specifically, the seat 102 moves horizontally along with the clamping needle mechanism 1, causing the convex strip 104 to move synchronously. The rolling wheel 405 rolls along its surface, causing the guide strip 406 and the connecting plate 407 to move horizontally along the linear guide mechanism 8. The connecting plate 407 transmits power to the concave clamping block 401 to realize the feeding and resetting actions. During the displacement of the concave clamping block 401, the spring 2 in the countersunk hole 403 is compressed. When the extrusion pressure disappears, the spring 2 resets, thereby pushing the concave clamping block 401 to reset. In this embodiment, by setting a convex strip 104 and a rolling wheel 405, the mutual linkage between the mating seat 102 and the needle feeding mechanism is realized, so as to avoid the feeding lag of the needle material belt 5 and ensure the stability of the action connection with the needle clamping mechanism 1. Furthermore, by using the power of the needle clamping mechanism 1 to drive the needle supply mechanism, there is no need to set up additional driving components such as motors or cams, which further simplifies the overall structure of the equipment and reduces costs.

[0032] Example 2: The present invention also provides another embodiment of the needle feeding mechanism, which includes a needle feeding roller group, the needle feeding roller group including a driving roller 105 and a driven roller 106, and the two extrude and feed the needle material belt 5 intermittently. The driving roller 105 and the driven roller 106 are rotatably connected to both sides of the guide frame 6 via the shaft bracket 107, and the guide frame 6 has appropriate openings on both sides.

[0033] Specifically, the active roller 105 and the driven roller 106 are rotatably connected to both sides of the guide frame 6 via the shaft bracket 107. The roller body passes through the appropriate opening of the guide frame 6, extends into the feeding groove 601, and clamps and squeezes the needle material strip 5 in the groove. When the active roller 105 receives the power of intermittent rotation, it rotates intermittently at a fixed angle. Through the squeezing friction between the roller surface and the needle material strip 5, it drives the needle material strip 5 to move in a fixed distance in a straight line along the feeding groove 601, realizing feeding without slippage and collision. When the active roller 105 stops rotating, the roller group clamps and positions the needle material strip 5, and the strip stops moving, completing one intermittent feeding cycle. In this embodiment, by setting the extrusion feeding of the active roller 105 and the driven roller 106, relative to the insertion and pushing of the needle supply block 4, fatigue of the material belt connection and deformation of the needle body caused by rigid impact with the needle material belt 5 are further avoided, ensuring the structural integrity of the needle material belt 5. Furthermore, the active roller 105 and the driven roller 106 are set to clamp and squeeze the needle material belt 5. During feeding, the friction force adheres to the surface of the material belt to avoid slippage during pushing, ensuring the consistency of the feeding pitch. The structure is simple and has strong stability. Furthermore, by connecting the shaft bracket 107 to both sides of the guide frame 6 with bolts, the original needle feeding mechanism can be directly replaced, which has low modification cost and good installation adaptability; Preferably, the surfaces of the drive roller 105 and the driven roller 106 are coated with polyurethane to increase the friction with the needle material belt 5 and prevent slippage during feeding. At the same time, the soft coating further avoids scratching the surface of the needle material belt 5. Preferably, deep groove ball bearings are provided at the rotatable connection between the driving roller 105 and the driven roller 106 and the shaft support 107, thereby reducing rotational friction and ensuring smooth rotation of the needle roller assembly.

[0034] Based on the above embodiments, a feed disk 108 is coaxially arranged on the top of the active roller 105. A plurality of feed teeth are arranged in a ring around the outer periphery of the feed disk 108. A lever block 109 is arranged on one side of the feed disk 108. One end of the lever block 109 is provided with an inclined surface that is adapted to the feed teeth. One end of the lever 109 is fixedly connected to the linkage block 110. One end of the linkage block 110 is provided with a movable seat 111. One end of the movable seat 111 is provided with a lever groove. The linkage block 110 is located in the lever groove and is hinged to it. A torsion spring is provided between the two.

[0035] Specifically, when the moving seat 111 moves linearly, it drives the connecting block 110, which is hinged to it, to move synchronously. The connecting block 110 pushes the dial block 109 to move. The dial block 109 engages with the feed teeth of the feed disc 108, pushing the feed disc 108 to rotate at a fixed angle. The feed disc 108 drives the coaxial drive roller 105 to rotate synchronously. The drive roller 105 and the driven roller 106 cooperate to realize the fixed-distance feeding of the needle material belt 5. When the moving seat 111 needs to be reset, the dial block 109 resets synchronously with the connecting block 110. Its inclined surface slides along the tooth surface of the feed teeth of the feed disc 108. The connecting block 110 swings around the hinge axis with the moving seat 111. After the dial block 109 slides past the feed teeth, the torsion spring elastically resets, so that the dial block 109 returns to its initial position and waits for the next movement of the moving seat 111, realizing the intermittent indexing rotation of the drive roller 105 and the intermittent feeding of the needle material belt 5. In this embodiment, the feeding disc 108 and the latching structure of the lever block 109 are used to realize the intermittent rotation of the drive roller 105 at a fixed angle, so as to ensure the accuracy of feeding the needle material belt 5. Furthermore, the paddle block 109 has an inclined surface that is compatible with the feed teeth. When the moving seat 111 is reset, the paddle block 109 can slide along the feed tooth surface and avoid it, replacing the original rigid impact structure of spring reset, avoiding collision with the needle material belt 5 and avoiding damage to the material belt. Preferably, the tooth tip of the feed tooth and the bevel edge of the paddle block 109 are both rounded with a radius of 0.2 to 0.5 mm to avoid scratching or jamming, and to ensure the smoothness of the bevel sliding over the feed tooth. At the same time, the contact sliding surfaces of the two are finely ground to reduce meshing friction. Preferably, the feed disc 108 is made of 45 steel and undergoes carburizing and quenching treatment, and the paddle block 109 is made of cemented carbide material, thereby improving the wear resistance of the tooth surface and the inclined surface, extending the service life of the indexing transmission structure, and making it suitable for long-term reciprocating motion. Furthermore, the feed teeth of the feed disc 108 are CNC indexed to ensure the consistency of tooth pitch and tooth shape, thereby ensuring the accuracy of the fixed-angle rotation of the drive roller 105 and further improving the accuracy of the feeding pitch.

[0036] Based on the above embodiment, one end of the movable seat 111 is rotatably connected to a rolling wheel 112, and a convex strip 113 is rolled against one side of the rolling wheel 112. The convex strip 113 is fixed on the mating seat 102. The top of the movable seat 111 is provided with a linear guide mechanism 801; The movable seat 111 is provided with a fixed abutment block 2 at the end away from the convex strip 2 113, and a return spring is provided between the two.

[0037] In this embodiment, by setting the rolling wheel 112 to roll along the convex strip 113, the needle feeding action shares the same power source with the needle clamping and needle cutting actions, avoiding the delay caused by the use of electronic control signals, thereby ensuring the accuracy of the needle insertion process action control. Furthermore, a linear guide mechanism 801 is set up to provide linear guidance and ensure the displacement accuracy of the moving seat 111 driving the dial block 109, thereby ensuring the accurate engagement of the dial block 109 with the feed plate 108. Preferably, the movable seat 111 is a rigid metal seat body, with a linear guide mechanism 801 connected to its top. A rolling wheel 112 is installed at one end, and a return spring is provided at the other end, which simultaneously drives the side lever 109 and the linkage block 110 to move synchronously. Preferably, the material of the convex strip 113 is 45 steel, and the contact surface is processed by a precision grinding machine to improve the surface quality, reduce frictional loss with the rolling wheel 112, and prevent surface wear.

[0038] Based on the above embodiments, the height of the driving roller 105 and the driven roller 106 is greater than or equal to the height of the needle material belt 5.

[0039] In this embodiment, while the active roller 105 and the driven roller 106 are intermittently feeding, the needle material strip 5 is fully pressed, further flattening and shaping any possible bending or warping of the strip. No additional pressing mechanism is required, and feeding and leveling are achieved simultaneously, improving the straightness of the needle body before insertion and ensuring that the subsequent slitting blade 206, limiting fork 207, and needle insertion head 305 can be accurately aligned. This reduces errors such as cutting deviation or insertion misalignment caused by bending of the needle body, and improves the process qualification rate. Furthermore, the contact surface with the needle material strip 5 is further increased to improve friction and prevent slippage during feeding.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection, the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.

[0041] The above provides a detailed description of an automatic feeding IGBT module quick-pin insertion device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fast pin insertion device for automatically feeding IGBT modules, characterized in that, It includes a three-dimensional frame, needle material belt, needle insertion mechanism, needle cutting mechanism, cam group, needle supply mechanism, and needle clamping mechanism adapted to the needle cutting mechanism; The cam assembly is located inside the three-dimensional frame and includes a needle insertion cam that drives the needle insertion mechanism, a needle cutting cam that drives the needle cutting mechanism, and a needle feeding cam that drives the needle clamping mechanism. The needle clamping mechanism works in conjunction with the needle cutting mechanism to clamp and cut the needle material strip; While the needle clamping mechanism is in motion, it controls the needle supply mechanism to intermittently supply needle material strips. The needle clamping mechanism includes a mating seat that is driven to move horizontally by a needle feeding cam, and a clamping table for clamping the needle material strip is fixedly connected to one end of the mating seat near the needle cutting mechanism. The needle cutting mechanism includes a slide base driven by a needle cutting cam to move horizontally. One end of the slide base is fixedly connected to a needle cutting seat, which corresponds to the clamping table.

2. The automatic feeding quick pin insertion device for IGBT modules according to claim 1, characterized in that, The needle feeding mechanism includes a guide frame, and a feeding groove is provided through the guide frame, and the needle material belt moves along the feeding groove. A feeding port is provided on one side of the guide frame. A needle feeding mechanism is movable inside the feeding port. The needle feeding mechanism passes through the feeding port and extends into the feeding groove to push the material intermittently.

3. The automatic feeding quick pin insertion device for IGBT modules according to claim 2, characterized in that, The needle supply mechanism includes a needle supply block, one end of which is set as an inclined surface. A hinge block is fixedly connected to one end of the needle supply block. A concave clamping block is hinged to the outer side of one end of the hinge block. A hinge groove for the needle supply block to move is opened on the inner side of the concave clamping block. A spring hole is opened in the hinge groove and a spring is installed in the hole. The spring is connected to the hinge block.

4. The automatic feeding quick pin insertion device for IGBT modules according to claim 3, characterized in that, A convex strip with one end protruding is fixedly connected to one side of the mating seat. A rolling wheel is rotatably mounted on the convex strip. A guide strip is rotatably connected to one end of the rolling wheel. A connecting plate is fixedly connected to one end of the guide strip. The connecting plate is fixedly connected to the concave clamping block. A linear guide mechanism is provided on one side of the connecting plate; The concave clamping block has a countersunk hole at the end away from the convex strip, and a spring is installed in the countersunk hole. One end of the spring is connected to a fixed abutment block.

5. The automatic feeding quick pin insertion device for IGBT modules according to claim 2, characterized in that, The needle feeding mechanism includes a needle feeding roller group, which includes a driving roller and a driven roller, and the two rollers squeeze the needle material strip and feed it intermittently. The active roller and the driven roller are rotatably connected to both sides of the guide frame via shaft brackets, and the guide frame has appropriate openings on both sides.

6. The automatic feeding quick pin insertion device for IGBT modules according to claim 5, characterized in that, The top of the drive roller is coaxially provided with a feed disk, and a plurality of feed teeth are arranged in a ring around the outer periphery of the feed disk. A shift block is provided on one side of the feed disk, and one end of the shift block is provided with an inclined surface that is adapted to the feed teeth. One end of the lever is fixedly connected to a linkage block, one end of the linkage block is provided with a movable seat, one end of the movable seat is provided with a lever groove, the linkage block is disposed in the lever groove and is hinged to it, and a torsion spring is provided between the two.

7. The automatic feeding quick pin insertion device for IGBT modules according to claim 6, characterized in that, One end of the movable seat is rotatably connected to a second rolling wheel, and a second convex strip is rolled against one side of the second rolling wheel. The second convex strip is fixed to the mating seat. The top of the movable seat is provided with a linear guide mechanism 2; The movable seat is provided with a fixed abutment block 2 at the end away from the convex strip 2, and a return spring is provided between the two.

8. The automatic feeding quick pin insertion device for IGBT modules according to claim 5, characterized in that, The height of the driving roller and the driven roller is greater than or equal to the height of the needle material strip.

9. The automatic feeding quick pin insertion device for IGBT modules according to claim 1, characterized in that, The end of the cutting needle holder near the needle clamping mechanism is provided with a retractable pressure block, a push rod punch, a limiting fork rod, and a slitting blade; The slitting blade and the limiting fork pass through the pressure block and slide with it, and the length of the limiting fork is greater than that of the slitting blade; A slitting base is connected through and fixedly connected inside the clamping table. The slitting base has through openings for corresponding limiting forks and slitting blades. The clamping platform has a through-hole square opening that is compatible with the push rod punch.

Images