A welding clamping fixture for copper clad laminate processing

Abstract

This invention relates to the field of copper clad laminate (CCL) processing equipment technology, and discloses a welding clamping fixture for CCL processing, including a base plate and a processing table, as well as an inner adsorption component, a detection component, a stretching component, outer suction cups, a negative pressure unit one, a negative pressure unit two, and a processing unit. The base plate is equipped with a negative pressure unit one providing negative pressure to several inner suction cups, a negative pressure unit two providing negative pressure to several outer suction cups, and a processing unit for adjusting the negative pressure intensity of negative pressure units one and two. By setting up the detection component, this invention can automatically identify the warpage direction of the CCL. The processing unit adjusts the negative pressure intensity provided by negative pressure units one and two according to the warpage direction, causing the inner and outer suction cups to generate differentiated adsorption forces. In conjunction with the stretching component, the outer suction cups are driven to move outward while simultaneously moving longitudinally, achieving targeted stretching and correction of the warped CCL, ensuring the CCL is flat after clamping, thereby effectively improving the precision of chip bonding.

Description

Technical Field

[0001] This invention relates to the field of copper clad laminate processing equipment, and more specifically to a welding clamping fixture for copper clad laminate processing. Background Technology

[0002] During the processing of copper-clad laminates, it is usually necessary to solder surface mount components to corresponding positions on the surface of the copper-clad laminate. To ensure the stability of the soldering process and the alignment accuracy of the soldering positions, clamping fixtures are commonly used in the industry to position and fix the copper-clad laminate.

[0003] Common clamping fixtures in existing technologies can be mainly divided into two types according to the direction of their clamping force: downward clamping and lateral clamping. Downward clamping typically uses clamping claws or blocks to press against the top surface of the copper-clad laminate (CCL) from top to bottom. This method has two significant drawbacks: first, the clamping components can easily obstruct the target welding area, interfering with the welding head or operating space and hindering normal welding operations; second, the clamping force acts directly on the top surface of the CCL, easily leaving indentations on the board surface, and even damaging the copper foil or substrate, affecting product yield. Lateral clamping applies clamping force from the side of the CCL; however, this type of fixture can easily cause bending deformation of the CCL during clamping, compromising the flatness of the board surface. This results in the welding position of the surface mount components deviating from the preset reference, reducing the accuracy of surface mount welding.

[0004] A more prominent problem is that before entering the soldering process, copper-clad laminates (CCLs) are often in a state of warping to varying degrees due to material internal stress, storage environment, or the influence of previous processes (generally peripheral warping; depending on the different orientations of the CCLs, it can be divided into a central area concave and an outer area warped upwards, or a central area convex and an outer area warped downwards). Existing clamping fixtures not only fail to effectively and stably hold the warped CCLs, but also lack the function of correcting the CCLs, making it impossible to straighten the warped board to a flat state before soldering. This causes the warping deformation to continuously accumulate in subsequent soldering processes, further exacerbating the chip placement deviation and severely restricting the improvement of chip soldering accuracy. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a welding clamping fixture for copper clad laminate processing, so as to achieve effective clamping and correction of warped copper clad laminates without obstructing welding or damaging the copper clad laminate, thereby improving the accuracy of chip bonding.

[0006] The objective of this invention can be achieved through the following technical solutions: A welding clamping fixture for copper clad laminate processing includes a base plate and a processing table, and further includes: The internal adsorption assembly includes an internal suction tube, an internal suction cup, and a pull-down structure. The processing table is provided with several sets of storage slots and sealing slots. The internal suction tube passes through the storage slots and sealing slots. The internal suction cup is installed at the top of the internal suction tube. A pull-down structure is installed in the sealing slot to drive the internal suction cup into the storage slot. Several internal suction cups adhere to the central area of ​​the copper-clad laminate. The detection component has a mounting groove at the center of the processing table, and a detection component for detecting the warping direction of the copper-clad laminate is installed in the mounting groove. The processing table is equipped with a stretching assembly and external suction cups. The stretching assembly is installed at each of the four diagonal corners. The external suction cups are installed on the stretching assembly. The stretching assembly drives the external suction cups to move downward while moving longitudinally a certain distance. Several external suction cups stick to the outer periphery of the copper-clad laminate. The base plate includes a negative pressure unit 1, a negative pressure unit 2, and a processing unit. The negative pressure unit 1 provides negative pressure to several inner suction cups, the negative pressure unit 2 provides negative pressure to several outer suction cups, and the processing unit adjusts the negative pressure of the negative pressure units 1 and 2.

[0007] As a further embodiment of the present invention: the detection component includes a top rod, and a ring plate is provided around the top rod. The ring plate is longitudinally slidably installed in the mounting groove. An elastic element is connected between the ring plate and the bottom of the mounting groove. Two sets of trigger elements are symmetrically installed around the top rod. A lower sensing element and an upper sensing element are arranged sequentially from bottom to top on the inner wall of the mounting groove. Both the lower sensing element and the upper sensing element are connected to the processing unit.

[0008] As a further embodiment of the present invention: the pull-down structure includes a piston ring, a piston ring installed in the sealing groove, the piston ring being sleeved around the inner suction tube, a main rack being provided on the piston ring, a driven rack being provided around the inner suction tube, a gear being rotatably installed in the sealing groove to mesh with the main rack and the driven rack, the main rack and the driven rack being symmetrical about the central axis of the gear, a hole being opened on the outer wall of the inner suction tube, a flipping plate being rotatably installed in the hole, the flipping plate initially blocking the hole, an elastic element being connected between the piston ring and the bottom of the sealing groove, and a connecting hole communicating with the atmosphere being opened at the bottom of the sealing groove.

[0009] As a further embodiment of the present invention: the stretching assembly includes a slide and a push-pull base. The slide is mounted on a processing table. A limiting plate is provided at the bottom of the push-pull base. A limiting groove is opened on the slide. The limiting plate and the limiting groove are slidably engaged. Elastic elements three are installed on both sides of the limiting groove. The other end of the elastic element three elastically abuts against the side of the limiting plate. An external suction tube is connected to the external suction cup. The external suction tube is fixedly installed in the push-pull base. An elastic element six is ​​connected between the bottom end of the external suction tube and the slide. A push-pull component is installed on the push-pull base to drive the external suction cup to move horizontally and vertically.

[0010] As a further embodiment of the present invention: the push-pull component includes a pressure ring, an upper inclined block, and a lower inclined block. The push-pull base is symmetrically provided with an upper sliding groove, a lower sliding groove, and a telescopic groove. The upper inclined block and the lower inclined block are slidably installed in the upper sliding groove and the lower sliding groove, respectively. The upper inclined block and the lower inclined block are both U-shaped, and one side of the upper inclined block and the lower inclined block is located in the telescopic groove. Elastic elements are connected between the upper inclined block and the upper sliding groove, and between the lower inclined block and the lower sliding groove. The pressure ring is symmetrically provided with a pressure rod at its bottom. The pressure rod extends through into the telescopic groove. An elastic element is connected between the pressure rod and the bottom of the telescopic groove. The pressure rod is provided with an upper pressure block for pressing the upper inclined block and a lower pressure block for pressing the lower inclined block. The slide base is U-shaped. The upper inclined groove and the lower inclined groove are symmetrically provided on the two inner walls of the slide base. The upper inclined block slides in conjunction with the upper inclined groove, and the lower inclined block slides in conjunction with the lower inclined groove.

[0011] As a further aspect of the present invention: magnetic attracting elements are provided at the highest points of the upper and lower inclined grooves, and magnetic blocks that are magnetically attracted to the magnetic attracting elements are provided on the side of the upper and lower inclined blocks.

[0012] As a further aspect of the present invention: four sets of oblique holes are provided on the processing table, and guide grooves are provided on the inner walls of the oblique holes. A slider is provided on the slide block, and the slider slides in cooperation with the guide groove. A sleeve rod is installed at the bottom of the slide block, and a linkage rod is sleeved between adjacent sleeve rods. A telescopic component is installed at one corner of the processing table, and the output end of the telescopic component is connected to one set of slide blocks.

[0013] As a further embodiment of the present invention: the bottom of the processing table is provided with support plates around the perimeter, and guide holes are provided on the support plates, through which the end of the linkage rod passes.

[0014] The beneficial effects of this invention are: (1) By setting up a detection component, the present invention can automatically identify the warping direction of the copper clad laminate. The processing unit adjusts the negative pressure provided by the negative pressure unit one and the negative pressure unit two according to the warping direction, so that the inner suction cup and the outer suction cup generate different adsorption forces. In conjunction with the stretching component, the outer suction cup is driven to move outward while moving longitudinally, so as to achieve targeted stretching and correction of the warped copper clad laminate, ensuring that the copper clad laminate is flat after clamping, thereby effectively improving the chip soldering accuracy.

[0015] (2) By setting a pull-down structure in the internal adsorption component, the piston ring is driven to move upward by negative pressure after the internal suction cup holds the copper-clad board. The internal suction tube and internal suction cup are driven downward by the gear rack transmission to enter the storage groove, so that the copper-clad board is in contact with the top surface of the processing table. This avoids the problems of blocking the welding area and damaging the board surface in the traditional downward pressing method, and ensures the stability of the clamping and the flatness of the copper-clad board.

[0016] (3) The present invention, through the cooperation of the pressure ring, pressure rod, upper inclined block, lower inclined block and upper inclined groove and magnetic suction component in the stretching assembly, can automatically switch the stretching path of inclined upward or inclined downward according to the magnitude of the external suction cup adsorption force, and simultaneously realize outward and longitudinal movement to effectively correct the warping of the outer periphery; at the same time, the telescopic component, sleeve rod and linkage rod are used to realize the synchronous adjustment of the four sets of slides, which can adapt to the clamping and correction requirements of copper clad laminates of different sizes and improve the versatility of the tooling. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support plate and linkage rod in this invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the processing table in this invention; Figure 4 This is a schematic diagram of the connection structure between the slide and the external suction cup in this invention; Figure 5 This is a schematic diagram of the structure after the slide and the outer suction cup are separated in this invention; Figure 6 This is a schematic diagram of the internal structure of the slide block in this invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the push-pull seat in this invention; Figure 8 yes Figure 7 Enlarged structural diagram at point A in the middle.

[0019] In the picture: 1. Base plate; 2. Machining table; 21. Angled hole; 211. Guide groove; 22. Support plate; 221. Guide hole; 23. Storage groove; 24. Sealing groove; 25. Connecting hole; 26. Mounting groove; 3. Internal adsorption assembly; 31. Internal suction tube; 311. Flipping plate; 312. Driven rack; 32. Internal suction cup; 33. Piston ring; 331. Main rack; 34. Gear; 35. Elastic element one; 4. Detection assembly; 41. Push rod; 42. Ring plate; 43. Elastic element two; 44. Trigger; 45. Lower sensor; 46. Upper sensor; 5. Tension assembly; 51. Slide; 511. Slider; 512 513. Limiting groove; 514. Upper inclined groove; 515. Lower inclined groove; 516. Magnetic suction component; 517. Elastic component three; 52. Sleeve rod; 53. Push-pull seat; 531. Limiting plate; 532. Upper sliding groove; 533. Lower sliding groove; 534. Telescopic groove; 54. Pressure ring; 541. Pressure rod; 542. Upper pressure block; 543. Lower pressure block; 544. Elastic component four; 55. Upper inclined block; 56. Lower inclined block; 57. Elastic component five; 58. Magnetic block; 6. External suction cup; 61. External suction tube; 62. Elastic component six; 7. Linkage rod; 8. Telescopic component; 9. Negative pressure unit one; 10. Negative pressure unit two; 11. Processing unit. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-8 As shown, a welding clamping fixture for copper-clad laminate processing includes a base plate 1 and a processing table 2, and further includes: The internal adsorption component 3 is installed on the processing table 2. The internal adsorption component 3 includes an internal suction tube 31, an internal suction cup 32 and a pull-down structure. The processing table 2 is provided with a number of storage slots 23 and sealing slots 24. The internal suction tube 31 passes through the storage slots 23 and sealing slots 24. The internal suction cup 32 is installed at the top of the internal suction tube 31. The sealing slot 24 is equipped with a pull-down structure that drives the internal suction cup 32 into the storage slot 23. The internal suction cups 32 adhere to the central area of ​​the copper-clad laminate. The detection component 4 is installed in the center of the processing table 2 with a mounting groove 26. The detection component 4 for detecting the warping direction of the copper-clad laminate is installed in the mounting groove 26. The stretching assembly 5 and the external suction cup 6 are installed at the four opposite corners of the processing table 2. The stretching assembly 5 is equipped with the external suction cup 6. The stretching assembly 5 drives the external suction cup 6 to move downward while moving longitudinally a certain distance. Several external suction cups 6 stick to the outer periphery of the copper-clad laminate. The base plate 1 is equipped with a negative pressure unit 9, a negative pressure unit 10, and a processing unit 11. The negative pressure unit 9 provides negative pressure to a number of inner suction cups 32, the negative pressure unit 10 provides negative pressure to a number of outer suction cups 6, and the processing unit 11 adjusts the negative pressure of the negative pressure units 9 and 10.

[0022] In practical application, the copper-clad laminate to be welded is placed in the center on the processing table 2. Under the weight of the copper-clad laminate itself, the detection component 4 detects the warping direction of the copper-clad laminate. The detection component 4 then transmits this warping information of the copper-clad laminate to the processing unit 11. The processing unit 11 then controls the negative pressure unit 1 9 and the negative pressure unit 2 10 to start, so that several inner suction cups 32 and several outer suction cups 6 generate adsorption force, thereby holding the copper-clad laminate and completing the clamping of the copper-clad laminate. When the copper-clad laminate is placed on the processing table 2 in a position where the central area is concave downwards and the outer ring area is warped upwards, the processing unit 11 controls the negative pressure unit 9 to provide the negative pressure to the inner suction cup 32 to be less than the negative pressure unit 10 to provide the negative pressure to the outer suction cup 6. This results in the outer suction cup 6 having a greater adsorption force on the warped outer ring area of ​​the copper-clad laminate, while the inner suction cup 32 has a smaller adsorption force on the central area of ​​the copper-clad laminate. At the same time, the stretching component 5 drives the outer suction cup 6 to move outwards while moving downwards a small distance. In this way, the copper-clad laminate is clamped and fixed in the central area, and the outer ring area is stretched and corrected outwards and downwards. When the copper-clad laminate is placed on the processing table 2 with the central area bulging upward and the outer area warped downward, the processing unit 11 controls the negative pressure unit 9 to provide a stronger negative pressure to the inner suction cup 32 than the negative pressure unit 10 to provide a stronger negative pressure to the outer suction cup 6. This results in a weaker suction force of the outer suction cup 6 on the warped outer area of ​​the copper-clad laminate, while a stronger suction force of the inner suction cup 32 on the central area of ​​the copper-clad laminate. At the same time, the stretching component 5 drives the outer suction cup 6 to move outward while moving upward a short distance. In this way, the copper-clad laminate is clamped and fixed in the central area, and the outer area is stretched and corrected outward and upward. In summary, this application enables the copper-clad laminate to be flat when clamped, and corrects the warped areas of the copper-clad laminate, thereby improving the soldering accuracy of surface mount components.

[0023] Furthermore, the detection component 4 includes a push rod 41, with an annular plate 42 surrounding the push rod 41. The annular plate 42 is longitudinally slidably installed in the mounting groove 26. An elastic element 43 connects the annular plate 42 and the bottom of the mounting groove 26. Two sets of trigger elements 44 are symmetrically installed around the push rod 41. A lower sensing element 45 and an upper sensing element 46 are sequentially arranged from bottom to top on the inner wall of the mounting groove 26. Both the lower sensing element 45 and the upper sensing element 46 are connected to the processing unit 11.

[0024] In practical application, initially, the elastic element 43 drives the push rod 41 to always tend to move upward. If the copper-clad laminate is flat, when the copper-clad laminate is placed on the processing table 2, it will press the push rod 41 downward, causing the originally elongated push rod 41 to slowly retract into the mounting groove 26, so that the trigger element 44 on the push rod 41 is located between the lower sensing element 45 and the upper sensing element 46. If the central area of ​​the copper-clad laminate is concave downward, the degree of pressure of the copper-clad laminate on the push rod 41 will increase, and the push rod 41 will drive the trigger element 44 to move down a large distance, so that the trigger element 44 contacts the lower sensing element 45. If the central area of ​​the copper-clad laminate is convex upward, the degree of pressure of the copper-clad laminate on the push rod 41 will decrease, and the push rod 41 will drive the trigger element 44 to move down a small distance, so that the trigger element 44 contacts the upper sensing element 46. When the copper-clad laminate is placed on the processing table 2 with its central area concave and its outer area warped upward, the trigger 44 contacts the lower sensing element 45, thereby transmitting a signal to the processing unit 11. The processing unit 11 then controls the negative pressure provided by the negative pressure unit 19 to the inner suction cup 32 to be less than the negative pressure provided by the negative pressure unit 20 to the outer suction cup 6, so that the suction force of the outer suction cups 6 on the warped outer area of ​​the copper-clad laminate is greater, while the suction force of the inner suction cups 32 on the central area of ​​the copper-clad laminate is smaller. When the copper-clad laminate is placed on the processing table 2 with its central area bulging upward and its outer area warped downward, the trigger 44 contacts the upper sensing element 46, thereby transmitting a signal to the processing unit 11. The processing unit 11 then controls the negative pressure provided by the negative pressure unit 19 to the inner suction cup 32 to be greater than the negative pressure provided by the negative pressure unit 20 to the outer suction cup 6, so that the suction force of the outer suction cups 6 on the warped outer area of ​​the copper-clad laminate is small, while the suction force of the inner suction cups 32 on the central area of ​​the copper-clad laminate is large. The detection component 4 can detect the warping direction of the copper-clad laminate, so that when clamping the copper-clad laminate in the subsequent process, it can ensure that the clamping is stable and the copper-clad laminate is flat, and can also perform targeted correction on the copper-clad laminate, thereby improving the soldering accuracy of the surface mount components. In addition, for copper-clad laminates with minor warping, compressed air can be blown upwards by several inner suction cups 32 corresponding to the warped area of ​​the copper-clad laminate. If the central area of ​​the copper-clad laminate is concave downwards and the outer area is warped upwards, the compressed air forms a high-speed airflow in the wedge-shaped gap between the warped area of ​​the copper-clad laminate and the inner suction cups 32, generating negative pressure according to Bernoulli's principle, causing the copper-clad laminate to be attracted downwards. If the central area of ​​the copper-clad laminate is convex upwards and the outer area is warped downwards, the compressed air will form an air film between the copper-clad laminate and the inner suction cups 32, using the positive pressure air buoyancy effect of the compressed air to lift the copper-clad laminate upwards. For copper-clad laminates with significant warping, this can increase the moving distance of the push rod 41, thereby amplifying the warping direction of the copper-clad laminate, so as to clamp and correct the copper-clad laminate.

[0025] Furthermore, the pull-down structure includes a piston ring 33, which is installed in the sealing groove 24. The piston ring 33 is sleeved around the inner suction tube 31. A main rack 331 is provided on the piston ring 33, and a secondary rack 312 is provided around the inner suction tube 31. A gear 34 that meshes with the main rack 331 and the secondary rack 312 is rotatably installed in the sealing groove 24. The main rack 331 and the secondary rack 312 are symmetrical about the central axis of the gear 34. A hole is opened on the outer wall of the inner suction tube 31, and a flip plate 311 is rotatably installed in the hole. The flip plate 311 initially blocks the hole. An elastic element 35 is connected between the piston ring 33 and the bottom of the sealing groove 24. A connecting hole 25 that communicates with the atmosphere is opened at the bottom of the sealing groove 24.

[0026] In practical application, when the copper-clad laminate is placed on the processing table 2, it is supported by several inner suction cups 32 and top rods 41. When clamping the copper-clad laminate, the negative pressure unit 9 generates negative pressure at the inner suction cups 32, creating an adsorption force that causes the inner suction cups 32 to adhere to the bottom of the copper-clad laminate. After the inner suction cups 32 have adhered to and stabilized the copper-clad laminate, the negative pressure unit 9 continues to provide negative pressure, causing the flipping plate 311 to flip inward toward the inner suction tube 31, thus making the copper-clad laminate more secure. The sealing groove 24 is under negative pressure, which causes the piston ring 33 to move upward. Through the cooperation of the main rack 331, gear 34 and driven rack 312, the inner suction tube 31 moves downward, causing the inner suction cup 32 to drive the copper-clad laminate downward. The inner suction cup 32 enters the receiving groove 23. Several inner suction cups 32 drive the copper-clad laminate downward, so that the copper-clad laminate is in contact with the top surface of the processing table 2, thereby keeping the copper-clad laminate flat after being clamped, thus improving the welding accuracy of the surface mount components.

[0027] Furthermore, the stretching assembly 5 includes a slide 51 and a push-pull seat 53. The slide 51 is mounted on the processing table 2. The bottom of the push-pull seat 53 is provided with a limiting plate 531. A limiting groove 512 is opened on the slide 51. The limiting plate 531 and the limiting groove 512 are slidably engaged. Elastic elements 516 are installed on both sides of the limiting groove 512. The other end of the elastic element 516 elastically abuts against the side of the limiting plate 531. An external suction tube 61 is connected to the external suction cup 6. The external suction tube 61 is fixedly installed in the push-pull seat 53. An elastic element 62 is connected between the bottom end of the external suction tube 61 and the slide 51. A push-pull component is installed on the push-pull seat 53 to drive the external suction cup 6 to move horizontally and vertically.

[0028] The push-pull component includes a pressure ring 54, an upper inclined block 55, and a lower inclined block 56. The push-pull base 53 has symmetrically formed upper sliding grooves 532, lower sliding grooves 533, and telescopic grooves 534. The upper inclined block 55 and lower inclined block 56 are slidably installed in the upper sliding grooves 532 and 533, respectively. Both the upper inclined block 55 and lower inclined block 56 are U-shaped, with one side of each block located within the telescopic groove 534. Elastic elements connect the upper inclined block 55 to the upper sliding groove 532, and the lower inclined block 56 to the lower sliding groove 533. 57. A pressure rod 541 is symmetrically provided at the bottom of the pressure ring 54. The pressure rod 541 extends through into the telescopic groove 534. An elastic element 544 is connected between the pressure rod 541 and the bottom of the telescopic groove 534. The pressure rod 541 is provided with an upper pressure block 542 for pressing the upper inclined block 55 and a lower pressure block 543 for pressing the lower inclined block 56. The slide 51 is U-shaped. An upper inclined groove 513 and a lower inclined groove 514 are symmetrically provided on the two inner walls of the slide 51. The upper inclined block 55 is slidably engaged with the upper inclined groove 513, and the lower inclined block 56 is slidably engaged with the lower inclined groove 514.

[0029] The highest point of both the upper inclined groove 513 and the lower inclined groove 514 is provided with a magnetic attracting element 515, and the upper inclined block 55 and the lower inclined block 56 are provided with a magnetic block 58 that is magnetically attracted to the magnetic attracting element 515.

[0030] In practical application, when the copper-clad laminate is placed on the processing table 2 with its central area concave and its outer ring area warped upward, the suction force of the outer suction cups 6 on the warped outer ring area of ​​the copper-clad laminate is large, while the suction force of the inner suction cups 32 on the central area of ​​the copper-clad laminate is small. When the copper-clad laminate is placed on the processing table 2 with its central area convex and its outer ring area warped downward, the suction force of the outer suction cups 6 on the warped outer ring area of ​​the copper-clad laminate is small, while the suction force of the inner suction cups 32 on the central area of ​​the copper-clad laminate is large. With this setting, when the suction force of the outer suction cups 6 is large, the compression degree of the outer suction cups 6 is large (thinner and flattened), and the downward movement distance of the pressure ring 54 is relatively long. When the suction force of the outer suction cups 6 is small, the compression degree of the outer suction cups 6 is small, and the downward movement distance of the pressure ring 54 is relatively short. When the suction force of the outer suction cup 6 is small, the pressure ring 54 drives the pressure rod 541 to move down a shorter distance. Therefore, the upper pressure block 542 will squeeze the upper inclined block 55, while the lower pressure block 543 is still above the lower inclined block 56. The squeezed upper inclined block 55 enters the upper inclined groove 513. The magnetic suction piece 515 and the magnetic block 58 are attracted by magnetism, causing the upper inclined block 55 to move obliquely upward. This causes the push-pull seat 53 to drive the outer suction cup 6 to move outward while moving vertically upward a certain distance. This allows the copper-clad laminate to be stretched outward through the four sets of outer suction cups 6, and at the same time, the area of ​​the outer ring of the copper-clad laminate that is warped downward is stretched and corrected obliquely upward. When the suction force of the outer suction cup 6 is large, the pressure ring 54 drives the pressure rod 541 to move down a longer distance. First, the upper pressure block 542 will squeeze the upper inclined block 55, so that the upper inclined block 55 enters the upper inclined groove 513. However, the upper pressure block 542 will quickly pass over the upper inclined block 55. With the rebound ability of the elastic element three 516 and the elastic element six 62, the upper inclined block 55 is prevented from sliding after entering the upper inclined groove 513. Then, the lower pressure block 543 squeezes the lower inclined block 56, so that the lower inclined block 56 enters the lower inclined groove 514. Through the magnetic attraction between the magnetic suction element 515 and the magnetic block 58, the lower inclined block 56 moves diagonally downward. This causes the push-pull seat 53 to move the outer suction cup 6 outward while moving it vertically downward a certain distance. Thus, the copper-clad laminate is stretched outward by the four sets of outer suction cups 6, and the area of ​​the outer ring of the copper-clad laminate that is warped upward is stretched and corrected diagonally downward.

[0031] like Figures 1-5 As shown, the processing table 2 has four sets of inclined holes 21, and the inner wall of the inclined holes 21 has a guide groove 211. The slide block 51 has a slider 511, which slides in cooperation with the guide groove 211. The bottom of the slide block 51 is equipped with a sleeve rod 52, and a linkage rod 7 is sleeved between adjacent sleeve rods 52. A telescopic component 8 is installed at one corner of the processing table 2, and the output end of the telescopic component 8 is connected to one set of slide blocks 51.

[0032] The bottom of the processing table 2 is provided with support plates 22 on all four sides. The support plates 22 have guide holes 221, and the end of the linkage rod 7 passes through the guide holes 221.

[0033] In one embodiment, the negative pressure unit 9 can selectively control the inner suction cups 32 at different positions to generate suction force.

[0034] In practical application, according to different sizes of copper-clad laminates, after placing the copper-clad laminate on the processing table 2, the telescopic component 8 is activated to move one set of slide blocks 51. Through the cooperation of adjacent sleeve rods 52 and several linkage rods 7, the four sets of slide blocks 51 move inward or outward simultaneously, thereby adjusting the outer suction cups 6 to the four corners of the bottom of the copper-clad laminate, so that several inner suction cups 32 and several outer suction cups 6 can clamp copper-clad laminates of different sizes and perform correction processing on copper-clad laminates of different sizes.

[0035] Working principle: The copper-clad laminate is placed on the processing table 2. The push rod 41 causes the trigger 44 to contact the lower sensor 45 or the upper sensor 46 according to the warping direction of the board surface. The processing unit 11 controls the negative pressure unit 9 and the negative pressure unit 10 to generate a pressure difference, so that the inner suction cup 32 and the outer suction cup 6 form a differentiated adsorption force. During adsorption, the negative pressure in the inner suction cup 32 opens the flip plate 311, and the negative pressure in the sealing groove 24 causes the piston ring 33 to move upward. Through the main rack 331, gear 34 and the secondary rack 312, the inner suction cup 32 moves downward into the receiving groove 23, flattening the central area of ​​the copper-clad laminate. Simultaneously, the outer suction cup 6 adheres to the outer perimeter area. If the suction force of the outer suction cup 6 is weak, the pressure ring 54 moves down only slightly, and the upper pressure block 542 pushes the upper inclined block 55 into the upper inclined groove 513, causing the outer suction cup 6 to move outward and obliquely upward, correcting the downward warping of the outer ring. If the suction force of the outer suction cup 6 is strong, the pressure ring 54 moves down significantly, and the lower pressure block 543 pushes the lower inclined block 56 into the lower inclined groove 514, causing the outer suction cup 6 to move outward and obliquely downward, correcting the upward warping of the outer ring. For copper-clad laminates of different sizes, the telescopic component 8 adjusts the position of the slide block 51 synchronously via the linkage rod 7, so that the outer suction cup 6 can be aligned with the corner of the board for clamping and correction.

Claims

1. A welding clamping fixture for processing copper-clad laminates, comprising a base plate (1) and a processing table (2), characterized in that, Also includes: The internal adsorption assembly (3) is installed on the processing table (2). The internal adsorption assembly (3) includes an internal suction tube (31), an internal suction cup (32) and a pull-down structure. The processing table (2) is provided with a number of storage slots (23) and sealing slots (24). The internal suction tube (31) passes through the storage slots (23) and sealing slots (24). The internal suction cup (32) is installed at the top of the internal suction tube (31). The sealing slot (24) is provided with a pull-down structure that drives the internal suction cup (32) into the storage slot (23). The internal suction cups (32) adhere to the central area of ​​the copper-clad laminate. The detection component (4) has a mounting groove (26) at the center of the processing table (2), and the detection component (4) for detecting the warping direction of the copper-clad laminate is installed in the mounting groove (26). The stretching assembly (5) and the external suction cup (6) are installed at the four opposite corners of the processing table (2). The stretching assembly (5) is equipped with an external suction cup (6). The stretching assembly (5) drives the external suction cup (6) to move downward while moving longitudinally for a distance. Several external suction cups (6) suck up the outer periphery of the copper-clad board. Negative pressure unit 1 (9), negative pressure unit 2 (10) and processing unit (11) are installed on the base plate (1) to provide negative pressure for a plurality of inner suction cups (32), negative pressure unit 2 (10) to provide negative pressure for a plurality of outer suction cups (6), and processing unit (11) to adjust the negative pressure of negative pressure unit 1 (9) and negative pressure unit 2 (10).

2. The welding clamping fixture for copper-clad laminate processing according to claim 1, characterized in that, The detection component (4) includes a top rod (41), and a ring plate (42) is provided around the top rod (41). The ring plate (42) is longitudinally slidably installed in the mounting groove (26). An elastic element (43) is connected between the ring plate (42) and the bottom of the mounting groove (26). Two sets of trigger elements (44) are symmetrically installed around the top rod (41). A lower sensing element (45) and an upper sensing element (46) are arranged sequentially from bottom to top on the inner wall of the mounting groove (26). Both the lower sensing element (45) and the upper sensing element (46) are connected to the processing unit (11).

3. The welding clamping fixture for copper-clad laminate processing according to claim 2, characterized in that, The pull-down structure includes a piston ring (33), which is installed in the sealing groove (24). The piston ring (33) is sleeved around the inner suction tube (31). A main rack (331) is provided on the piston ring (33), and a secondary rack (312) is provided around the inner suction tube (31). A gear (34) that meshes with the main rack (331) and the secondary rack (312) is rotatably installed in the sealing groove (24). The main rack (331) and the secondary rack (312) are symmetrical about the central axis of the gear (34). A hole is opened on the outer wall of the inner suction tube (31), and a flip plate (311) is rotatably installed in the hole. The flip plate (311) initially blocks the hole. An elastic element (35) is connected between the piston ring (33) and the bottom of the sealing groove (24). A connecting hole (25) that communicates with the atmosphere is opened at the bottom of the sealing groove (24).

4. The welding clamping fixture for copper-clad laminate processing according to claim 3, characterized in that, The stretching assembly (5) includes a slide (51) and a push-pull seat (53). The slide (51) is installed on the processing table (2). The bottom of the push-pull seat (53) is provided with a limiting plate (531). A limiting groove (512) is opened on the slide (51). The limiting plate (531) and the limiting groove (512) are slidably engaged. Elastic element three (516) is installed on both sides of the limiting groove (512). The other end of the elastic element three (516) elastically abuts against the side of the limiting plate (531). An external suction tube (61) is connected to the external suction cup (6). The external suction tube (61) is fixedly installed in the push-pull seat (53). An elastic element six (62) is connected between the bottom end of the external suction tube (61) and the slide (51). A push-pull component is installed on the push-pull seat (53) to drive the external suction cup (6) to move horizontally and vertically.

5. The welding clamping fixture for copper-clad laminate processing according to claim 4, characterized in that, The push-pull component includes a pressure ring (54), an upper inclined block (55), and a lower inclined block (56). The push-pull base (53) is symmetrically provided with an upper sliding groove (532), a lower sliding groove (533), and a telescopic groove (534). The upper inclined block (55) and the lower inclined block (56) are slidably installed in the upper sliding groove (532) and the lower sliding groove (533), respectively. Both the upper inclined block (55) and the lower inclined block (56) are U-shaped, and one side of each block is located within the telescopic groove (534). Elastic elements are connected between the upper inclined block (55) and the upper sliding groove (532), and between the lower inclined block (56) and the lower sliding groove (533). 57), the bottom of the pressure ring (54) is symmetrically provided with pressure rods (541), the pressure rods (541) extend through into the telescopic groove (534), and an elastic element (544) is connected between the pressure rods (541) and the bottom of the telescopic groove (534). The pressure rods (541) are provided with an upper pressure block (542) for pressing the upper inclined block (55) and a lower pressure block (543) for pressing the lower inclined block (56). The slide (51) is U-shaped, and the two inner walls of the slide (51) are symmetrically provided with an upper inclined groove (513) and a lower inclined groove (514). The upper inclined block (55) slides with the upper inclined groove (513), and the lower inclined block (56) slides with the lower inclined groove (514).

6. The welding clamping fixture for copper-clad laminate processing according to claim 5, characterized in that, The upper inclined groove (513) and the lower inclined groove (514) are provided with magnetic attracting elements (515) at their highest points, and the upper inclined block (55) and the lower inclined block (56) are provided with magnetic blocks (58) that are magnetically attracted to the magnetic attracting elements (515).

7. The welding clamping fixture for copper-clad laminate processing according to claim 4, characterized in that, The processing table (2) has four sets of oblique holes (21), and the inner wall of the oblique holes (21) has a guide groove (211). The slide block (51) has a slider (511), which slides in cooperation with the guide groove (211). A sleeve rod (52) is installed at the bottom of the slide block (51), and a linkage rod (7) is sleeved between adjacent sleeve rods (52). A telescopic component (8) is installed at one corner of the processing table (2), and the output end of the telescopic component (8) is connected to one set of slide blocks (51).

8. The welding clamping fixture for processing copper-clad laminates according to claim 7, characterized in that, The processing table (2) has support plates (22) on all four sides of its bottom. The support plates (22) have guide holes (221) and the end of the linkage rod (7) passes through the guide holes (221).

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