Polyimide sheet cutting and punching integrated forming processing equipment

Abstract

The present application relates to a kind of polyimide sheet slitting punch integrated forming processing equipment, including intelligent feeding and discharging unit, tool clamp unit, combined processing unit;The intelligent feeding and discharging unit includes magazine (1) and mechanical arm feeding module (2);The tool clamp unit includes pneumatic self-defining core assembly (3), hydraulic rotary clamping assembly (4) and positioning clamping assembly (5);Combined processing unit includes drilling assembly (6) and cutting assembly (7).Compared with prior art, the present application realizes flexible automatic feeding, automatic punching, polyimide sheet profiling, with the advantages of high efficiency, high precision.

Description

Technical Field

[0001] This invention belongs to the field of automated production equipment for polyimide, and in particular relates to an integrated molding and processing equipment for polyimide sheet cutting and punching. Background Technology

[0002] Polyimide sheets are a type of high-performance engineering plastic with excellent overall properties. They possess superior thermal stability, mechanical properties, dimensional stability, self-lubricating friction resistance, and radiation resistance. They are also quite rigid with a low specific gravity, approximately one-fifth that of steel. Under high-temperature conditions, they exhibit high strength, low coefficient of friction, and low coefficient of expansion. Long-term service temperature is ≥280℃, and short-term service temperature can exceed ≥400℃. They are widely used in aerospace, microelectronics, and many other fields.

[0003] The processing of sheet metal involves two steps: cutting and drilling. These processes are inefficient and labor-intensive. The equipment is unique and inefficient; if machine maintenance or minor malfunctions require repair, there is no backup equipment, disrupting production. The increased number of bushing parts necessitates a high level of operator skill with the existing equipment, keeping operators constantly under heavy workload. Both cutting and drilling clamping of the slab require manual clamping, which introduces errors. The older equipment cannot use internally cooled drill bits, requiring external coolant injection into the holes, resulting in poor cooling and lubrication and short drill bit lifespan. The use of screens for filtration is ineffective, leading to frequent clogging of the coolant nozzles and necessitating cleaning of the reservoir. Safety hazards exist, including hand injuries from misoperation during manual clamping, injuries from slippery slabs causing bars to fall and fall during manual unloading, eye burns from coolant splashes during manual calibration, and slab warping and material spillage due to human error during clamping. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology by providing an integrated molding and processing equipment for cutting and punching polyimide sheets, thereby achieving automated punching and cutting of polyimide sheets, solving the production bottleneck problem, and also solving the problem of excessive error.

[0005] The objective of this invention can be achieved through the following technical solution: an integrated molding and processing equipment for cutting and punching polyimide sheets, comprising an intelligent loading and unloading unit, a tooling fixture unit, and a combined processing unit;

[0006] The intelligent loading and unloading unit includes a clip-type hopper and a robotic arm feeding module;

[0007] The tooling fixture unit includes a pneumatic self-centering assembly, a hydraulic rotary clamping assembly, and a positioning clamping assembly;

[0008] The modular machining unit includes a drilling assembly and a cutting assembly;

[0009] The slab to be processed is placed in a spring-loaded hopper and gripped by a robotic arm feeding module. It is then placed in a tooling fixture unit, positioned by a pneumatic self-centering component, and clamped by a hydraulic rotary clamping component. A hole is drilled by a drilling component, and then the slab is moved to the cutting point. The hydraulic rotary clamping component opens, and the slab is clamped by a positioning clamping component and moved to the cutting point. The slab is then cut by a cutting component, and finally the finished product is removed by the robotic arm feeding module.

[0010] Furthermore, the magazine-type hopper includes a mounting plate and a cylinder and a pusher plate mounted on it, as well as a hopper consisting of a positioning plate and a sliding rod. The cylinder is connected to the pusher plate, and the slabs to be processed are stacked sequentially in the hopper, with the bottom slab placed on the pusher plate. At least two sets of hoppers are provided, capable of simultaneously storing at least two specifications of slabs. The robot grippers do not need to be replaced for different specifications of slabs. Using a robotic arm significantly reduces workload, improves production efficiency, and eliminates safety hazards.

[0011] Furthermore, the mounting plate is also provided with multiple limiting posts on one side of the loading bin. After the pusher plate pushes out the blank, it is supported and limited by the limiting posts, which makes it easier for the robotic arm feeding module to grab it.

[0012] Furthermore, the pneumatic self-centering assembly includes a base plate and a cylinder and a self-centering cylinder clamp mounted on it. The cylinder is connected to the self-centering cylinder clamp. Vertical support plates are provided on both sides of the cylinder. Support plates and limit pins are provided on the vertical support plates. The blank to be processed is placed on the support plate, limited by the limit pins, and clamped by the self-centering cylinder clamp.

[0013] Furthermore, a pad is provided between the cylinder and the base plate.

[0014] Furthermore, the hydraulic rotary clamping assembly includes a mounting plate and a pair of hydraulic rotary cylinders. Each hydraulic rotary cylinder is equipped with a flexible floating pressure plate in the shape of a right-angled forked lever. The flexible floating pressure plate is equipped with multiple pressure heads with springs. When the blank to be processed moves to the drilling station, the hydraulic rotary cylinder drives the pressure plate to rotate above the blank, so that it presses the blank from top to bottom. After drilling is completed, the hydraulic rotary cylinder drives the flexible floating pressure plate to release and rotate open, so that the blank can enter the cutting station.

[0015] Furthermore, the mounting plate is installed on the base plate of the pneumatic self-centering assembly, the self-centering cylinder clamps the blank from the side, and the flexible floating pressure plate presses the blank from top to bottom.

[0016] Furthermore, the positioning and clamping assembly includes a mounting base, a positioning and clamping cylinder, a cylinder mounting plate, a cylinder, and a pressure finger. The positioning and clamping cylinder is disposed between the mounting base and the cylinder mounting plate. The cylinder is mounted on the cylinder mounting plate, and the pressure finger is located on the cylinder and connected to the cylinder.

[0017] Furthermore, the positioning and clamping components are arranged in pairs to clamp the sheet metal from both sides;

[0018] Furthermore, the pressing finger is in the shape of two bent fingers, with a groove between the two fingers for the blade of the cutting component to pass through.

[0019] Furthermore, the drilling assembly simultaneously drills holes at both ends of the product with an accuracy of approximately 0.1mm. The feed is controlled by a servo motor with stepless speed regulation, automatically adjusting according to the drilling feed speed. The drilling interval speed can be controlled within 0.01mm by the front and rear servos. The use of internally cooled drill bits, with an internal cooling pressure of 50KG, increases drill bit lifespan by at least 5 times. Simultaneous drilling of both sides of the slab increases drilling efficiency by 5 times.

[0020] Furthermore, the cutting assembly includes a cutting handle and a servo motor. The cutting handle is equipped with multiple blades or a single blade, which are controlled by the servo motor in terms of forward and backward movement, up and down movement, left and right movement, and rotation speed. This allows for high-precision cutting of each product and reduces repetitive processing.

[0021] The equipment also includes an electrical system, which employs a high-precision servo system, greatly improving processing accuracy and efficiency while ensuring safety during production.

[0022] The equipment is also equipped with a cooling system and a filtration system. The cooling pressure is guaranteed at 50 kg to ensure that the waste material from drilling can be discharged smoothly. It adopts a four-stage filtration system with a final filtration accuracy of 0.01 mm to ensure that the cooling system does not get clogged.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The storage rack of the present invention adopts a spring clip type hopper, which can simultaneously meet the storage of two specifications of slabs. The robot gripper of different specifications of slabs does not need to be replaced. The use of a robotic arm greatly reduces the workload, improves production efficiency, and eliminates safety hazards.

[0025] (2) The fixture of this invention adopts a hydraulic-pneumatic combined clamping method, with hydraulic clamping and pneumatic self-centering. When there is an error in the slab size, the repeated clamping accuracy of the core clamp is within 0.02mm. The use of pneumatic self-centering ensures that slabs of different sizes can be simultaneously positioned at the same center, thereby improving the accuracy of repeated processing. The pneumatic pressure is low, ensuring secure clamping of the slab without damaging it. The dual-combination hydraulic system uses a fully floating clamping method during drilling to ensure that the slab does not deviate and moves simultaneously to the cutting point. The forked lever cylinder clamps, while the rotating cylinder and core clamp open, ensuring that the pillow cutting and drilling are in the same straight line position without deviation, reducing positioning errors caused by repeated clamping. The fixture contains an air detection device; the equipment automatically alarms when the product is not in position.

[0026] (3) The product is drilled at both ends simultaneously, and the accuracy can be guaranteed to be around 0.1mm. The feed is controlled by a servo motor with stepless speed regulation, which automatically changes according to the feed speed of the drilling. The drilling interval speed can be controlled within 0.01mm by the front and rear servos. The internal cooling drill bit is used, which increases the drill bit service life by at least 5 times. The slab is drilled at both ends simultaneously, which increases the drilling efficiency by 1 time.

[0027] (4) Depending on the size of the slab, the cutting shank can be used with multiple blades or a single blade. It can be controlled by forward and backward, up and down, left and right, speed and servo control, and can cut each product with high precision, reducing repeated processing.

[0028] (5) High processing accuracy and efficiency, and guaranteed safety in production. Drilling and cutting are carried out through a cooling system to ensure smooth discharge of waste materials, and the filtration system achieves a filtration accuracy of 0.01mm to ensure that the cooling system does not become clogged.

[0029] (6) The present invention realizes automated drilling and cutting of polyimide sheets with high efficiency and high precision. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the polyimide sheet cutting and punching integrated molding and processing equipment of the present invention;

[0031] Figure 2 This is a schematic diagram of the intelligent loading and unloading unit structure;

[0032] Figure 3 This is a schematic diagram of the installation platform for the magazine-type hopper and the robotic arm feeding module.

[0033] Figure 4 This is a schematic diagram of the gripper assembly structure of the robotic arm's feeding module.

[0034] Figure 5 This is a schematic diagram of the structure of a pneumatic self-centering assembly;

[0035] Figure 6 This is a schematic diagram of the combination of the pneumatic self-centering assembly and the hydraulic rotary clamping assembly;

[0036] Figure 7 This is a schematic diagram of the positioning and clamping assembly;

[0037] Figure 8 This is a schematic diagram of the other side of the positioning clamping assembly. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0039] Example

[0040] A polyimide sheet cutting and punching integrated molding and processing equipment includes an intelligent loading and unloading unit, a tooling fixture unit, a combined processing unit, a multi-axis machine tool 101, a feeding table 9, and a discharge basket 10. The intelligent loading and unloading unit is mounted on the feeding table 9, the tooling fixture unit and the combined processing unit are mounted on the multi-axis machine tool 101, and the discharge basket 10 is located on one side of the feeding table 9. Specifically:

[0041] like Figure 2-4 As shown, the intelligent loading and unloading unit includes a clip-type hopper 1 and a robotic arm feeding module 2;

[0042] The magazine-type hopper 1 includes a mounting plate a11 and a cylinder a12 and a pusher plate 13 mounted on it, as well as a hopper composed of a positioning plate 14 and a sliding rod 15. Multiple positioning plates 14 are connected by the sliding rod 15 to form a frame-type hopper structure. Multiple hoppers can be set according to the size of the slab to be processed. In this embodiment, there are two hoppers. A pad 18 is provided between the mounting plate a11 and the equipment table to leave space for the mounting cylinder a12. The cylinder a12 is connected to the pusher plate 13, which is located between the positioning plate 14 and the mounting plate a11 at the bottom of the hopper. The slabs to be processed are stacked in the hopper in sequence, with the bottom slab placed on the pusher plate 13. The mounting plate a11 has multiple limiting posts 16 on one side of the loading hopper, and multiple supporting posts 17 next to the limiting posts 16. These supporting posts 17 form a platform for supporting the slab. The height of the supporting posts 17 is lower than that of the limiting posts 16. After the pusher plate 13 pushes the slab out, it is placed on the supporting posts 17 and limited by the limiting posts 16 on one side, facilitating the gripping of the robotic arm feeding module 2. (See also...) Figure 2-3 .

[0043] The robotic arm feeding module 2 includes a robotic arm 21, a slide plate component 22, a slider 23, a rodless cylinder c24, a cylinder bracket 25, a mounting plate c26, a mounting plate bracket 27, and a platform 28. One end of the robotic arm 21 is connected to the gripper assembly 8, and the other end is mounted on the slider 23 via the slide plate component 22. Two sliders 23 are mounted on the mounting plate c26, which also houses the rodless cylinder c24 and the cylinder bracket 25. The mounting plate c26 is mounted on the platform 28 via the mounting plate bracket 27. (See also...) Figure 3 .

[0044] The gripper assembly 8 includes a gripper 81, an elastic pressure head 82 (including a pressure head, spring, washer, and screw), a cylinder d83, and a flange 84. The gripper 81 has a pair of grippers, with the elastic pressure heads 82 positioned on their opposing inner sides. The gripper 81 is connected to the cylinder d83 and mounted on the robotic arm 21 via the flange 84. See also... Figure 4 .

[0045] like Figure 5-8As shown, the tooling fixture unit includes a pneumatic self-centering assembly 3, a hydraulic rotary clamping assembly 4, and a positioning clamping assembly 5;

[0046] The pneumatic self-centering assembly 3 includes a base plate 31 and a cylinder b32 and a self-centering cylinder clamp 33 mounted on it. The cylinder b32 is connected to the self-centering cylinder clamp 33. Support plates 35 are provided on both sides of the cylinder b32. Support plates 36 and limiting pins 37 are provided on the support plates 35. The blank to be processed is placed on the support plate 36, limited by the limiting pins 37, and clamped by the self-centering cylinder clamp 33. A pad block 34 is also provided between the cylinder b32 and the base plate 31. (See also...) Figure 5-6 .

[0047] The hydraulic rotary clamping assembly 4 includes a mounting plate b41 and paired hydraulic rotary cylinders 42. Each hydraulic rotary cylinder 42 is equipped with a right-angled, forked, lever-shaped flexible floating pressure plate 43, which has multiple spring-loaded pressure heads 44. When the blank to be processed moves to the drilling station, the hydraulic rotary cylinder 42 drives the flexible floating pressure plate 43 to rotate above the blank, pressing it down from top to bottom. After drilling, the hydraulic rotary cylinder 42 drives the flexible floating pressure plate 43 to release and rotate open, facilitating the entry of the blank into the cutting station. The mounting plate b41 is mounted on the base plate 31 of the pneumatic self-centering assembly 3. The self-centering cylinder clamp 33 clamps the blank from the side, and the flexible floating pressure plate 43 presses the blank down from top to bottom. See also Figure 6 .

[0048] The positioning and clamping assemblies 5 are arranged in pairs to clamp the sheet metal from both sides. Each positioning and clamping assembly 5 includes a mounting base 51, a positioning and clamping cylinder 52, a hydraulic cylinder mounting plate 53, a hydraulic cylinder 54, and a pressure finger 55. The positioning and clamping cylinder 52 is disposed between the mounting base 51 and the hydraulic cylinder mounting plate 53. The hydraulic cylinder 54 is mounted on the hydraulic cylinder mounting plate 53, and the pressure finger 55 is located on and connected to the hydraulic cylinder 54. The pressure finger 55 is in the shape of two bent fingers, with a groove between the two fingers for the blade of the cutting assembly 7 to pass through. See also... Figure 7-8 .

[0049] The modular machining unit includes a drilling assembly 6 and a cutting assembly 7;

[0050] Specifically, the drilling assembly 6 includes paired servo motors and conventional drill bits. The assembly drills simultaneously at both ends of the product, ensuring an accuracy of approximately 0.1mm. The feed is controlled by the servo motors with stepless speed regulation, automatically adjusting according to the drilling feed rate. The drilling interval can be controlled within 0.01mm by the front and rear servo motors. The use of internally cooled drill bits increases drill bit lifespan by at least 5 times, and simultaneous drilling on both sides of the slab doubles drilling efficiency.

[0051] The cutting assembly 7 includes a cutting handle and a servo motor. The cutting handle is equipped with multiple blades or a single blade, which are controlled by the servo motor to move forward and backward, up and down, left and right, and rotate at high speed. This allows for high-precision cutting of each product and reduces repetitive processing.

[0052] The equipment also includes an electrical system, a cooling system, and a filtration system. The electrical system mainly employs a high-precision servo system, which greatly improves processing accuracy and efficiency while ensuring safety during production. The cooling system maintains a cooling pressure of 50 kg to ensure the smooth discharge of drilling waste. It uses a four-stage filtration system with a final filtration accuracy of 0.01 mm to prevent clogging of the cooling system.

[0053] When using,

[0054] The blank to be processed is placed in the spring-loaded hopper 1 and gripped by the robotic arm feeding module 2. It is then placed in the tooling fixture unit and positioned by the pneumatic self-centering assembly 3. The self-centering cylinder clamp 33 driven by cylinder b32 clamps the blank from the side. The pneumatic self-centering assembly 3 is driven by a servo motor to enter the drilling station. The hydraulic rotary clamping assembly 4's hydraulic rotary cylinder 42 drives the flexible floating pressure plate 43 to rotate 90 degrees. The flexible floating pressure plate 43 presses the blank from top to bottom. The drilling assembly 6 drills holes from both sides. After drilling, the hydraulic rotary cylinder 42 drives the flexible floating pressure plate 43 to rotate 90 degrees in the opposite direction to open. The servo motor drives the pneumatic self-centering assembly 3 to move the drilled blank to the cutting point. The positioning clamping cylinder 52 drives the hydraulic cylinder mounting plate 53 to move the pressure finger 55 to position. Then, the hydraulic cylinder 54 drives the pressure finger 55 to press the blank. The blank is then cut by the cutting assembly 7. After completion, the finished product is taken out by the robotic arm feeding module 2 and placed in the unloading basket 10.

[0055] This embodiment designs two types of slab cutting: 250*140*2 and 250*46*22. The two types of slabs are placed in separate storage bins, and the program is selected for processing. After the slabs are completed, measurements are taken, and all dimensions meet the requirements. The slab processing time is: 14 minutes / piece for large slabs and 8 minutes / piece for small slabs. Compared with traditional equipment and processes, this method improves efficiency by 70%, reduces labor by 85%, and eliminates potential safety hazards during production.

Claims

1. An integrated molding and processing equipment for cutting and punching polyimide sheets, characterized in that, Includes intelligent loading and unloading units, tooling and fixture units, and combined processing units; The intelligent loading and unloading unit includes a magazine-type hopper (1) and a robotic arm feeding module (2). The tooling fixture unit includes a pneumatic self-centering assembly (3), a hydraulic rotary clamping assembly (4), and a positioning clamping assembly (5); The modular machining unit includes a drilling assembly (6) and a cutting assembly (7); The blank to be processed is placed in the spring clip hopper (1) and gripped by the robotic arm feeding module (2), placed in the tooling fixture unit, positioned by the pneumatic self-centering component (3), and clamped by the hydraulic rotary clamping component (4). It is then drilled by the drilling component (6), and then moved to the cutting point. The hydraulic rotary clamping component (4) is opened, the self-centering is released and clamped by the positioning clamping component (5), and moved to the cutting point. It is then cut by the cutting component (7), and the finished product is taken out by the robotic arm feeding module (2). The pneumatic self-centering assembly (3) includes a base plate (31) and a cylinder b (32) and a self-centering cylinder clamp (33) provided thereon. The cylinder b (32) is connected to the self-centering cylinder clamp (33). The cylinder b (32) has support plates (35) on both sides. The support plates (35) have support plates (36) and limit pins (37). The blank to be processed is placed on the support plate (36), limited by the limit pins (37), and clamped by the self-centering cylinder clamp (33).

2. The polyimide sheet cutting and drilling integrated forming and processing equipment according to claim 1, characterized in that, The magazine-type hopper (1) includes a mounting plate a (11) and a cylinder a (12) and a pusher plate (13) mounted on it, as well as a hopper composed of a positioning plate (14) and a slide bar (15). The cylinder a (12) is connected to the pusher plate (13), and the blanks to be processed are stacked in the hopper in sequence, with the bottom blank placed on the pusher plate (13).

3. The polyimide sheet cutting and punching integrated forming and processing equipment according to claim 2, characterized in that, The mounting plate a (11) is also provided with multiple limiting posts (16) on one side of the loading bin. After the push plate (13) pushes out the blank, it is supported and limited by the limiting posts (16), which makes it easy for the robotic arm feeding module (2) to grab it.

4. The integrated molding and processing equipment for cutting and punching polyimide sheets according to claim 1, characterized in that, A pad (34) is also provided between the cylinder b (32) and the base plate (31).

5. The integrated molding and processing equipment for cutting and punching polyimide sheets according to claim 1, characterized in that, The hydraulic rotary clamping assembly (4) includes a mounting plate b (41) and a pair of hydraulic rotary cylinders (42). Each hydraulic rotary cylinder (42) is provided with a flexible floating pressure plate (43) in the shape of a right-angled forked lever. The flexible floating pressure plate (43) is provided with multiple pressure heads (44) with springs. When the blank to be processed moves to the drilling station, the hydraulic rotary cylinder (42) drives the flexible floating pressure plate (43) to rotate above the blank, so that it presses the blank from top to bottom. After drilling is completed, the hydraulic rotary cylinder (42) drives the flexible floating pressure plate (43) to release and rotate open, so that the plate can enter the cutting station.

6. The integrated molding and processing equipment for cutting and punching polyimide sheets according to claim 5, characterized in that, The mounting plate b (41) is mounted on the base plate (31) of the pneumatic self-centering assembly (3), the self-centering cylinder clamp (33) clamps the blank from the side, and the flexible floating pressure plate (43) presses the blank from top to bottom.

7. The integrated molding and processing equipment for cutting and punching polyimide sheets according to claim 1, characterized in that, The positioning and clamping assembly (5) includes a mounting base (51), a positioning and clamping cylinder (52), a cylinder mounting plate (53), a cylinder (54), and a pressure finger (55). The positioning and clamping cylinder (52) is disposed between the mounting base (51) and the cylinder mounting plate (53). The cylinder (54) is mounted on the cylinder mounting plate (53). The pressure finger (55) is located on the cylinder (54) and connected to the cylinder (54).

8. The integrated molding and processing equipment for cutting and punching polyimide sheets according to claim 7, characterized in that, The positioning and clamping components (5) are arranged in pairs to clamp the sheet metal from both sides; The pressing finger is in the shape of two bent fingers, with a groove between the two fingers for the blade of the cutting component (7) to pass through.

9. The integrated molding and processing equipment for cutting and punching polyimide sheets according to claim 1, characterized in that, The drilling assembly (6) drills holes at both ends of the product simultaneously, and the feed is controlled by a servo motor; The cutting assembly (7) includes a cutting handle and a servo motor. The cutting handle is equipped with multiple blades or a single blade and is controlled by the servo motor.

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