A multi-layer sheet combined copper plate compression fusion forming processing technology
By setting a pad and a clamping plate under the copper plate, combined with segmented drilling and cooling liquid, the problems of hole skew and cracks during copper plate drilling were solved, achieving efficient and precise drilling results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG GULING INTELLIGENT POWER TECH CO LTD
- Filing Date
- 2023-02-15
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the drilling process for copper plates is difficult to guarantee the accuracy of the holes, which can easily lead to problems such as skewed holes and cracks in the copper plates.
A backing plate is placed under the copper plate. The drill bit first drills through the pressure plate and then into the copper plate. Combined with the design of the clamping plate and the extendable section, the drilling is carried out in stages and cooled by coolant. Different rotation speeds and retraction speeds are used to fix the position of the copper plate by using the limiting area to ensure drilling accuracy and efficiency.
It improves drilling accuracy, reduces copper plate cracks and burrs, increases drilling efficiency and hole wall quality, and is suitable for multi-layer laminated copper plates of different specifications.
Smart Images
Figure CN116160039B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of copper plate processing technology, and in particular to a multi-layer laminated copper plate pressing and melting forming process. Background Technology
[0002] Copper plates have excellent electrical conductivity, so they are often used as connectors in circuit systems. Flexible copper plate connections, in particular, offer better ductility than ordinary copper plates. This ductility compensates for thermal expansion and contraction caused by temperature changes, making flexible copper plate connections applicable to transformer installations, distribution cabinets, and enclosed busbars.
[0003] The flexible connection structure of copper plates typically features a raised center and holes at both ends. In the production process of flexible copper plate connections, multiple layers of copper foil are first stacked together. The ends of the copper foil are then melted and pressed to form the fixed section of the copper plate. The middle section of the copper plate remains stacked with multiple layers of copper foil, forming the extendable section. Holes are then drilled into the fixed section of the melted and pressed multi-layered copper plate. These holes are used for connecting bolts, and the copper plate is connected to connectors or other components through these holes.
[0004] When drilling holes in copper plates, ordinary drilling techniques cannot guarantee the accuracy of the holes, and the holes may become skewed during the drilling process. Summary of the Invention
[0005] To improve drilling accuracy, this application provides a multi-layer laminated copper plate pressing and melting forming process.
[0006] This application provides a multi-layer laminated copper plate pressing and melting forming process using the following technical solution:
[0007] A multi-layer laminated copper plate pressing and melting forming process includes the following steps:
[0008] Step 1: Place the pad, multiple copper plates, and pressure plate sequentially from bottom to top on the worktable of the drilling equipment;
[0009] Step 2: Drive the pressure plate to descend, pressing the pressure plate and the fixed sections of the multiple copper plates together;
[0010] Step 3: Start the drilling equipment and drive the drill bit to drill holes in the fixed sections of the pressure plate and the multiple copper plates until through holes are drilled in the pressure plate and the multiple copper plates.
[0011] By adopting the above technical solution, the backing plate is placed on the lower layer of the copper plate, reducing the likelihood of cracks and burrs on the bottom layer of copper plate during drilling. The drill bit first penetrates the pressure plate, making the through-hole position more accurate when drilling into the copper plate after passing through the pressure plate, and the drilled through hole is less likely to be misaligned. When the clamping plate presses down on one end of the copper plate, the malleable section of the copper plate extends, preventing potential cracking. Stacking multiple copper plates together allows the drill bit to drill through multiple copper plates simultaneously, improving drilling efficiency.
[0012] Preferably, step 3 includes the following steps:
[0013] Step 3.1: Start the drilling equipment and drive the drill bit to descend and drill holes in the pressure plate and the multiple copper plates;
[0014] Step 3.2: Whenever the drill bit reaches the predetermined drilling depth, the drill bit retracts once and continues to descend until the drill bit has drilled the depth of the through hole;
[0015] Step 3.3: After drilling a through hole, push the worktable to move along the X-axis or Y-axis, move the copper plate to the corresponding position, and drive the drill bit to descend to drill other pre-positioned holes in the pressure plate and multiple copper plates.
[0016] By adopting the above technical solution, the drill bit can drill a single through hole in multiple passes, reducing the risk of overheating. Simultaneously, the copper wire wrapped around the drill bit can be cleaned during the retraction process. After drilling one through hole, the worktable is pushed so that the drill bit can be aligned with other predetermined drilling positions on the copper plate.
[0017] Preferably, after step 3.1, the following steps are also included:
[0018] Step 3.11: Turn on the spray pipe of the drilling equipment, and spray coolant onto the drill bit.
[0019] By adopting the above technical solution, coolant is used to cool the drill bit and copper plate, thereby improving the heat dissipation effect.
[0020] Preferably, in step 2, the clamping plate abuts against the fixed section and the extendable section of the copper plate, with A being the length of the extendable section not covered by the clamping plate, and B being the length of the clamping plate not covered by the clamping plate.
[0021] When 0 ≤ A ≤ 100 mm, B = 1 / 2 A; when A > 100 mm, B = 1 / 3 A.
[0022] By adopting the above technical solution, both the pressure plate and the extendable section have portions not covered by the clamping plate. When the clamping plate descends to press the pressure plate and copper plate together, the portion of the extendable section not covered by the clamping plate that contacts the pressure plate is simultaneously pressed, while the other portion of the extendable section undergoes extension deformation. This ensures that the boundary of the deformation of the extendable section of the copper plate is at a certain distance from the clamping plate, guaranteeing the flatness of the pressed fixed section and reducing the possibility of damage to the fusion molding structure due to excessive stress concentration during pressing and drilling, resulting in better drilling performance. By setting different pressure plate length ratios, it can accommodate multi-layer laminated copper plates of different specifications, saving pressure plate material while ensuring that there is a sufficient length of extendable section that can deform. This deformation compensates for the height difference with the pressed part, while the pressure plate is not easily deformed.
[0023] Preferably, in step 3.2, the total height of the plurality of copper plates and the pressure plate is C, and the predetermined depth is Dn, where n is the drilling order, n=1, 2, 3...
[0024] When 0 < C ≤ 60 mm, D1 = 25% C, D2 = 63% C, D3 = 88% C, D4 = C. At this time, the drill bit rotation speed is 20000 r / min, the drilling speed is 70 mm / min, and the retraction speed is 280 mm / min.
[0025] When 60mm < C ≤ 75mm, D1 = 20%C, D2 = 47%C, D3 = 77%C, D4 = 90%C, and D5 = C. At this time, the rotation speed of the drill bit is 25000r / min, the drilling speed is 70mm / min, and the retraction speed is 300mm / min.
[0026] By adopting the above technical solution, the drill bit drills holes in multiple stacked copper plates. Segmented drilling facilitates heat dissipation of the drill bit. Different gap settings are used for the predetermined depth to adapt to different drilling heights and positions. By coordinating different rotation speeds, drilling speeds, and retraction speeds, the hole position accuracy and hole wall quality are improved, thus enhancing the drilling effect.
[0027] Preferably, after step 3.3, the following steps are also included:
[0028] Step 4: Drive the pressure plate to rise and remove the pressure plate, the copper plate and the pad from the worktable.
[0029] By adopting the above technical solution, the pressure plate is driven to rise, which makes it easier to remove the copper plate and complete the drilling of multiple copper plates.
[0030] Preferably, the workbench is connected to columns, and multiple columns together form a limiting area. The width of the limiting area is adapted to the width of the copper plate. In step 1, one end of the pressure plate, multiple copper plates and the pad are all placed in the limiting area.
[0031] By adopting the above technical solution, the limiting area is used to restrict the position of the copper plate. When the copper plate is placed, it is aligned with the limiting area, which makes it convenient to pick up and place the copper plate. When multiple copper plates are placed in the limiting area, the position of the copper plates is consistent. The position of the copper plate is fixed during the drilling process and will not shift, making the drilling more accurate.
[0032] Preferably, the clamping plate has column holes at positions corresponding to the plurality of columns, and in step 2, the clamping plate abuts against the pressure plate, and the columns pass through the column holes.
[0033] By adopting the above technical solution, when the clamping plate descends, the column passes through the column hole, thereby using the clamping plate to further press the fixed section of the copper plate, which was originally formed by sheet melting, and at the same time press multiple copper plates together to facilitate drilling.
[0034] Preferably, a support plate is connected to one side of the worktable relative to the limiting area, and the height of the support plate is higher than the height of the edge of the worktable. In step 1, the ends of the multiple copper plates away from the pressing plate are placed above the support plate.
[0035] By adopting the above technical solution, the other end of the copper plate is placed on top of the support plate, thereby providing space for the extension and deformation of the stretchable section of the copper plate, while the support plate facilitates the removal of the copper plate.
[0036] Preferably, the clamping plate has a slot, and in step 3, the drill bit is driven to pass through the slot to drill holes in the clamping plate and the copper plate.
[0037] By adopting the above technical solution, the setting of the slot further facilitates the drill bit to directly drill holes in the pressure plate and copper plate.
[0038] In summary, this application has the following beneficial effects:
[0039] 1. A backing plate is placed on the bottom layer of the copper plate to reduce the likelihood of cracks and burrs on the bottom layer during drilling. The drill bit first penetrates the pressure plate, resulting in a more accurate through-hole position and less tendency for the drilled hole to be misaligned. When the clamping plate presses down on one end of the copper plate, the malleable section of the copper plate extends, preventing potential cracking. Stacking multiple copper plates together allows the drill bit to drill through multiple plates simultaneously, improving drilling efficiency.
[0040] 2. Both the pressure plate and the extendable section have portions not covered by the clamping plate. When the clamping plate descends to press down on the pressure plate and copper plate, the portion of the extendable section not covered by the clamping plate that contacts the pressure plate is simultaneously pressed down, while the other portion of the extendable section undergoes extension deformation. This ensures that the boundary of the deformation of the extendable section of the copper plate is at a certain distance from the clamping plate, guaranteeing the flatness of the pressed fixed section and reducing the possibility of damage to the fusion molding structure due to excessive stress concentration during pressing and drilling, resulting in better drilling performance. By setting different pressure plate length ratios, it can accommodate multi-layer laminated copper plates of different specifications, saving pressure plate material while ensuring that there is a sufficient length of extendable section that can deform, compensating for the height difference with the pressed part through deformation.
[0041] 3. Segmented drilling facilitates heat dissipation of the drill bit. Different gap settings are used for the predetermined depth to adapt to different drilling heights and positions. By coordinating different rotation speeds, drilling speeds, and retraction speeds, the hole position accuracy and hole wall quality are improved, thus enhancing the drilling effect. Attached Figure Description
[0042] Figure 1 This is a schematic diagram of the structure of the multilayer laminated copper plate according to an embodiment of this application;
[0043] Figure 2 This is a schematic diagram of the overall drilling process in the embodiments of this application;
[0044] Figure 3 This is a three-dimensional structural diagram of the drilling equipment according to an embodiment of this application;
[0045] Figure 4 This is a plan view of the workbench in an embodiment of this application;
[0046] Figure 5 This is a flowchart illustrating step 3 in an embodiment of this application;
[0047] Figure 6 This is a planar schematic diagram of the workbench from another angle in an embodiment of this application;
[0048] Figure 7 This is a three-dimensional structural diagram of the drilling equipment according to an embodiment of this application from another angle.
[0049] Explanation of reference numerals in the attached drawings: 1. Copper plate; 11. Fixed section; 12. Extendable section; 2. Worktable; 21. Column; 22. Limiting zone; 23. Mounting base; 24. Bearing plate; 3. Clamping plate; 31. Cylinder; 32. Column hole; 33. Hole; 4. Pressure plate; 41. Pad plate; 5. Drill bit; 51. Spray pipe; 6. Base; 61. Y-axis slide rail; 62. X-axis slide rail; 63. Lead screw. Detailed Implementation
[0050] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.
[0051] A multi-layer laminated copper plate 1, such as Figure 1 As shown, it includes fixed sections 11 at both ends and a stretchable section 12 in the middle. In the production of multilayer laminated copper plate 1, multiple copper foils are first stacked together. The ends of the multiple copper foils are heated and melted using a graphite heater. At the same time, the cooling system is turned on to protect the parts other than the ends of the copper foils. The copper molecules diffuse and fuse due to heat, so that the ends of the multiple copper foils fuse to form the fixed section 11 of the copper plate 1. The middle of the copper plate 1 still maintains the stacked and stretchable state of the copper foils, forming the stretchable section 12.
[0052] This application discloses a multi-layer laminated copper plate pressing and melting forming process.
[0053] Example 1
[0054] A multi-layer laminated copper plate pressing and melting forming process includes:
[0055] like Figure 2 and Figure 3 As shown, step 1: stack the pad 41, multiple copper plates 1 and pressure plate 4 on the worktable 2 of the drilling equipment from bottom to top, and limit the copper plates 1.
[0056] Multiple columns 21 are provided on one side of the workbench 2. The multiple columns 21 together form a limiting area 22. The width of the limiting area 22 is the same as the width of the copper plate 1. The pad 41, multiple copper plates 1 and one end of the pressure plate 4 are placed in the limiting area 22. The copper plates 1 are restricted by the surrounding columns 21, so that the horizontal position of the fixed section 11 of the copper plate 1 is fixed.
[0057] The workbench 2 has a support plate 24 on one side relative to the limiting area 22. The height of the support plate 24 is higher than the height of the frame of the workbench 2. The ends of the multiple copper plates 1 away from the limiting area 22 are placed on the support plate 24.
[0058] Step 2: Drive the clamping plate 3 to descend, clamping the clamping plate 4 and the fixing section 11 of the multiple copper plates 1.
[0059] The workbench 2 has mounting bases 23 connected to both sides of multiple columns 21. The mounting bases 23 are U-shaped with the opening facing downwards. A cylinder 31 is connected above the mounting base 23. The telescopic end of the cylinder 31 is set vertically. The output end of the cylinder 31 is connected to the pressure plate 3. Thus, by extending the output ends of the cylinders 31 on both sides, the pressure plate 3 is driven to descend and press the pressure plate 4 and the fixed section 11 of the copper plate 1.
[0060] The clamping plate 3 has multiple column holes 32, the positions of which correspond to the positions of the columns 21. When the clamping plate 3 descends, the columns 21 pass through the column holes 32, so that the clamping plate 3 can press against the pressure plate 4. The clamping plate 3 presses the fixing sections 11 of the multiple copper plates 1, which facilitates drilling.
[0061] like Figure 4 As shown, when the clamping plate 3 is lowered, it abuts against the fixed section 11 and a portion of the extendable section 12 of the copper plate 1. Let A be the length of the extendable section 12 not covered by the clamping plate 3, and B be the length of the pressure plate 4 not covered by the clamping plate 3. Then:
[0062] When 0 < A ≤ 100 mm, B = 1 / 2 A; when 100 mm < A, B = 1 / 3 A.
[0063] In this embodiment 1, the length of the extendable section 12 not covered by the clamping plate 3 is 80mm, and the length of the pressure plate 4 extending out of the clamping plate 3 is 40mm. When the clamping plate 3 is lowered, the pressure plate 4 covered by the clamping plate 3, the fixed section 11 of the copper plate 1, and a part of the extendable section 12 are pressed together. The 40mm extension of the pressure plate 4, along with the 40mm of the extendable section 12, is pressed together simultaneously. At this time, the remaining 40mm of the extendable section 12 will undergo extension deformation. The extension compensates for the height difference generated at both ends when the copper plate 1 is pressed together, thereby preventing cracks from forming on the copper plate 1.
[0064] By setting a specific ratio, a portion of the pressure plate 4 is not covered by the clamping plate 3, thus ensuring that the deformation boundary of the extendable section 12 occurs outside the clamping plate 3. The pressure plate 4 then compresses the lower extendable section, further ensuring that the fixing sections 11 of the multiple copper plates 1 are neatly pressed and fixed, improving the flatness of the fixing sections 11 and reducing the possibility of hole misalignment during drilling. The pressure plate 4 transfers the force of the fixing section 11 to the extendable section 12, reducing the stress concentration during pressing and drilling of the fixing section 11, thereby protecting the structure of the fixed section 11 from damage.
[0065] like Figure 3 and Figure 5 As shown, step 3.1: Start the drilling equipment and drive the drill bit 5 to descend and drill holes in the pressure plate 4 and the fixed section 11 of the multiple copper plates 1.
[0066] The clamping plate 3 has a slot 33 for the drill bit 5 to pass through, and the drill bit 5 drills holes in the clamping plate 4 and the copper plate 1 through the slot 33. During drilling, the drill bit 5 first drills through the clamping plate 4 and then drills the hole in the copper plate 1. The clamping plate 4 guides the drilling trajectory of the drill bit 5, and the setting of the clamping plate 4 makes it easy for the drill bit 5 to adjust its position in time, so that the hole position of the copper plate 1 is more accurate and less prone to deviation.
[0067] Step 3.11: Turn on the spray pipe 51 of the drilling equipment, and spray coolant onto the drill bit 5.
[0068] The spray pipe 51 is connected to the drill bit 5, and cools the drill bit 5 in a timely manner by spraying coolant.
[0069] Step 3.2: Whenever the drilling depth of drill bit 5 reaches the predetermined depth, drill bit 5 retracts once and continues to drive drill bit 5 down to drill the hole until drill bit 5 has drilled the depth of the through hole.
[0070] like Figure 6 As shown, let the total height of the multiple copper plates 1 and pressure plates 4 be C, and the predetermined depth be Dn, where n = 1, 2, 3... The predetermined depth refers to the distance from the upper surface of the pressure plate 4 to the bottom of the through hole in the bottom copper plate 1, and n refers to the drilling order. Then:
[0071] When 0 < C ≤ 60 mm, D1 = 25% C, D2 = 63% C, D3 = 88% C, D4 = C. At this time, the rotational speed of the drill bit 5 is 20000 r / min, the drilling speed is 70 mm / min, and the retraction speed is 280 mm / min.
[0072] When 60mm < C ≤ 75mm, D1 = 20%C, D2 = 47%C, D3 = 77%C, D4 = 90%C, and D5 = C. At this time, the rotation speed of the drill bit 5 is 25000r / min, the drilling speed is 70mm / min, and the retraction speed is 300mm / min.
[0073] In this embodiment 1, five copper plates 1 are placed on the workbench 2. Drill bit 5 drills holes in the stacked pressure plate 4 and the five copper plates 1. The total height of the five copper plates 1 and the pressure plate 4 is 56 mm. Drill bit 5 drills in four stages, maintaining a rotation speed of 20,000 r / min. After the first drilling depth reaches 14 mm, drill bit 5 retracts once and continues to descend. When the total drilling depth reaches 35 mm, drill bit 5 retracts a second time. When the drilling depth reaches 49 mm, drill bit 5 retracts a third time, and the fourth drilling completes the through hole. During the process, the drilling speed of drill bit 5 is maintained at 70 mm / min, and the retraction speed is 280 mm / min. Using this drilling method, the through hole position on the copper plate 1 is accurate, the hole wall is smooth, and there are almost no burrs.
[0074] The difference between the two predetermined depths is not the same. When the drill bit 5 first contacts the pressure plate 4 and the copper plate 1, the difference in drilling depth is small, which makes it easy for the drill bit 5 to retract and adjust the hole position in time. Then the difference in the predetermined depth of the drill bit 5 gradually increases. When the through hole is about to be completed, the predetermined depth of each drilling is slowed down to avoid the drill bit 5 from producing cracks or burrs when drilling the bottom copper plate 1.
[0075] In another embodiment, a predetermined depth was used: D1=25%C, D2=50%C, D3=75%C.
[0076] The drilling method was D4=C, meaning that when the total height of the pressure plate 4 and the five copper plates 1 was 56mm, the drill bit 5 retracted for the first time when the total drilling depth reached 14mm; the second time when the depth reached 28mm; and the third time when the depth reached 42mm. After drilling the through hole for the fourth time, it was found that the hole was crooked and had many burrs, resulting in poor drilling quality. It is speculated that this is due to the interaction between the multiple copper plates 1 and the effect of the interfaces between adjacent copper plates 1, making this drilling method unsuitable for drilling multiple copper plates 1 simultaneously.
[0077] During the drilling process, a combination of higher transfer speed, lower feed speed, and higher retraction speed is used to avoid problems such as drill breakage and rough hole walls, thereby improving the drilling effect.
[0078] like Figure 7 As shown, in step 3.3: after drilling a through hole, push the worktable 2 to move along the X-axis or Y-axis to move the copper plate 1 to the corresponding position, and drive the drill bit 5 to descend again to drill other pre-positioned holes in the pressure plate 4 and the fixed section 11 of the copper plate 1.
[0079] The drilling equipment includes a base at the bottom, to which a column 21 is fixedly connected. The column 21 is located on one side of the workbench 2, and the drill bit 5 is connected to the column 21. Therefore, the position of the drill bit 5 is fixed and cannot be changed.
[0080] A Y-axis slide rail 61 is mounted on the fixed base. One end of the Y-axis slide rail 61 is close to the column 21, and the other end extends away from the column 21. A Y-axis slider is slidably connected to the Y-axis slide rail 61. An X-axis slide rail 62 is connected to the Y-axis slider. The length direction of the X-axis slide rail 62 is perpendicular to the length direction of the Y-axis slide rail 61. An X-axis slider is slidably connected to the X-axis slide rail 62. The worktable 2 is connected to the X-axis slider. The sliding method of the X-axis slider and the Y-axis slider can be driven by a lead screw 63 or a chain. In this embodiment, the movement of the worktable 2 in the X-axis and Y-axis directions is achieved by driving the lead screw 63, thereby changing the position of the copper plate 1 corresponding to the drill bit 5, and thus realizing drilling at other positions.
[0081] like Figure 2 As shown, step 4: drive the pressure plate 3 to rise and remove the pressure plate 4, copper plate 1 and pad 41 from the worktable 2.
[0082] After the fixed section 11 at one end of the copper plate 1 is drilled, the output ends of the cylinders 31 on both sides retract and drive the clamping plate 3 to rise. The pad 41, multiple copper plates 1 and the pressure plate 4 can be removed from the limiting area 22. The copper plate 1 is manually rotated and the pad 41 and the pressure plate 4 are repositioned. The fixed section 11 at the other end of the multiple copper plates 1 is drilled to complete the post-processing of the multi-layer composite copper plate 1.
[0083] Example 2
[0084] The difference between this embodiment and Embodiment 1 is that, in this embodiment, the length of the extendable section 12 of the copper plate 1 not covered by the clamping plate 3 is 120mm, and the length of the pressure plate 4 extending beyond the clamping plate 3 is 40mm. After the clamping plate 3 is lowered, the pressure plate 4 compresses the 40mm extendable section 12, and the remaining 80mm of the extendable section 12 not covered by the clamping plate 3 and the pressure plate 4 deforms, saving material on the pressure plate 4.
[0085] In this embodiment, the total height of the five folded copper plates 1 and the pressure plate 4 is 66mm. Drilling a through hole requires five passes. When the drill bit 5 reaches a drilling depth of 13.2mm, 30.8mm, 50.6mm, and 59.4mm, the drill bit 5 will retract once. During this process, the drill bit 5 rotates at 25000r / min, the drilling speed is 70mm / min, and the retraction speed is 300mm / min. Using a higher rotation speed than before makes the drill bit 5 more powerful, and the higher retraction speed reduces the time the drill bit 5 stays in the hole, allowing the drill bit 5 and the hole wall to cool down in time and avoid overheating of the hole wall.
[0086] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. A multi-layer laminated copper plate pressing and forming process, characterized in that, Includes the following steps: Step 1: Place the pad (41), multiple copper plates (1) and pressure plate (4) sequentially from bottom to top on the worktable (2) of the drilling equipment; Step 2: Drive the pressure plate (3) down to press the pressure plate (4) and the fixing section (11) of the multiple copper plates (1); The clamping plate (3) abuts against the fixed section (11) and the extendable section (12) of the copper plate (1), with A being the length of the extendable section (12) not covered by the clamping plate (3) and B being the length of the pressure plate (4) not covered by the clamping plate (3). When 0 ≤ A ≤ 100 mm, B = 1 / 2 A; when A > 100 mm, B = 1 / 3 A. Step 3: Start the drilling equipment and drive the drill bit (5) to drill holes in the fixed section (11) of the pressure plate (4) and the multiple copper plates (1) until through holes are drilled in the pressure plate (4) and the multiple copper plates (1); Step 3.1: Start the drilling equipment and drive the drill bit (5) to descend and drill holes in the pressure plate (4) and the multiple copper plates (1); Step 3.2: Whenever the drilling depth of the drill bit (5) reaches the predetermined depth, the drill bit (5) retracts once and continues to drive the drill bit (5) to descend until the drill bit (5) has drilled the depth of the through hole; Let the total height of the plurality of copper plates (1) and the pressure plate (4) be C, and the predetermined depth be Dn, where n is the drilling order, n=1, 2, 3... When 0 < C ≤ 60 mm, D1 = 25% C, D2 = 63% C, D3 = 88% C, D4 = C. At this time, the rotation speed of the drill bit (5) is 20000 r / min, the drilling speed is 70 mm / min, and the retraction speed is 280 mm / min. When 60mm<C≤75mm, D1=20%C, D2=47%C, D3=77%C, D4=90%C, D5=C, the rotation speed of the drill bit (5) is 25000r / min, the drilling speed is 70mm / min, and the retraction speed is 300mm / min. Step 3.3: After drilling a through hole, push the worktable (2) to move along the X-axis or Y-axis, move the copper plate (1) to the corresponding position, and drive the drill bit (5) to descend to drill other pre-positioned holes in the pressure plate (4) and multiple copper plates (1).
2. The multi-layer laminated copper plate pressing and forming process according to claim 1, characterized in that, Following step 3.1, the following steps are also included: Step 3.11: Turn on the spray pipe (51) of the drilling equipment, and spray coolant onto the drill bit (5).
3. The multi-layer laminated copper plate pressing and forming process according to claim 1, characterized in that, Following step 3.3, the following steps are also included: Step 4: Drive the pressure plate (3) to rise and remove the pressure plate (4), the copper plate (1) and the pad (41) from the worktable (2).
4. The multi-layer laminated copper plate pressing and forming process according to claim 1, characterized in that: The workbench (2) is connected to a column (21), and multiple columns (21) together form a limiting area (22). The width of the limiting area (22) is adapted to the width of the copper plate (1). In step 1, one end of the pressure plate (4), multiple copper plates (1) and the pad (41) are placed in the limiting area (22).
5. The multi-layer laminated copper plate pressing and forming process according to claim 4, characterized in that: The clamping plate (3) has column holes (32) at positions corresponding to the plurality of columns (21). In step 2, the clamping plate (3) abuts against the pressure plate (4), and the columns (21) pass through the column holes (32).
6. The multi-layer laminated copper plate pressing and forming process according to claim 4, characterized in that: The workbench (2) is connected to a support plate (24) on one side relative to the limiting area (22). The height of the support plate (24) is higher than the height of the frame of the workbench (2). In step 1, the ends of the multiple copper plates (1) away from the pressing plate (3) are placed above the support plate (24).
7. The multi-layer laminated copper plate pressing and forming process according to claim 1, characterized in that: The clamping plate (3) has a slot (33). In step 3, the drill bit (5) is driven to pass through the slot (33) to drill holes in the clamping plate (4) and the copper plate (1).