A constant tension and material storage integrated automotive interior wrapping surface cutting device linked to a glue scraper line.

Abstract

This invention discloses a constant tension and material storage integrated cutting device for automotive interior trim coverings, linked to a glue-scraping line. The device includes a frame, a constant tension and material storage integrated mechanism, an automatic feeding mechanism, a cutting mechanism, and a control system. The constant tension and material storage integrated mechanism is located at the feeding end. A chain passes over the upper edge of a first sprocket and the lower edge of a second sprocket, connecting to a counterweight, causing the material storage roller to float up and down, thus integrating material storage and constant tension. The cutting mechanism employs a gear-synchronized cutting device with automatic clearance compensation, including a rectangular frame, a lower blade, a gantry frame driven by multiple cylinders, a swingable upper blade, a spring-loaded clamping assembly, a linear guide mechanism, and a gear and rack synchronization mechanism. The spring-loaded clamping assembly automatically compensates for blade wear clearance, and the gear and rack synchronization mechanism forces the gantry frame to rise and fall synchronously on both sides. Advantages include a compact structure, high cutting accuracy, fast changeover, and linkage with the glue-scraping line, significantly improving production efficiency and cutting quality.

Description

Technical Field

[0001] This invention relates to the field of automotive interior parts processing and manufacturing technology, specifically to a constant tension and material storage two-in-one automotive interior covering skin cutting device linked with a glue scraping line, which is particularly suitable for automated cutting and processing of hard interior parts covering skin such as automotive seat back panels, door panels, armrests, and center consoles. Background Technology

[0002] With the continuous improvement of automotive interior quality and intelligence, hard interior components such as seat back panels, door panels, armrests, and center consoles commonly adopt a skin-wrapping process. In the production of these components, the flexible skin material must first be cut, and then adhesive must be applied to the back of the skin to facilitate subsequent wrapping. Currently, traditional interior skin cutting relies heavily on manual labor or semi-automated equipment, which has the following drawbacks: 1. Poor adaptability: The specifications, width, and roll diameter of the outer skin of interior parts for different car models and different parts vary greatly. Traditional equipment is mostly of fixed size and structure, which makes it difficult to adapt to different specifications of outer skin rolls, and the loading and changing of materials is cumbersome.

[0003] 2. Low feeding accuracy: During the conveying process, the flexible skin is easily affected by uneven tension and material slippage, which can cause deviation and wrinkling. This results in insufficient matching accuracy between the cutting position and the glue scraping line, leading to misalignment or material shortage during subsequent wrapping and a low yield rate.

[0004] 3. Low level of automation: Existing cutting devices mostly require manual assistance for positioning and manual triggering of cutting, making it difficult to achieve synchronous linkage with the glue scraping line and failing to meet the needs of large-volume, high-cycle automated production.

[0005] 4. Poor connection with the glue application process: Most cutting devices only perform individual cutting and have not optimized the structure for the glue application line position. The matching degree between the cutting contour and the glue application bonding area is low, which affects the coating quality.

[0006] Furthermore, existing patents such as CN215037738U disclose a variable frequency controlled flexible material cutting device for automotive interiors, which prevents material deviation through a limiting mechanism; CN202422169817.2 discloses a cutting device for automotive interior covering skin, which uses rotating rollers to press and flatten the material; and CN201710231888.3 discloses an automatic cutting machine for automotive interior leather, integrating unwinding, conveying, and punching. However, none of the above-mentioned existing technologies are specifically designed for the skin after adhesive application, and they do not solve the technical problems of easy adhesion of the skin after adhesive application, the need for constant tension, and precise cutting in conjunction with the adhesive application line. Therefore, there is an urgent need to develop a dedicated device that can adaptively store material, automatically and accurately feed material, and cut in conjunction with the adhesive application line. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A constant tension and material storage integrated automotive interior wrapping surface cutting device linked to a glue-scraping line, comprising: Rack (1); The constant tension material storage two-in-one mechanism (2) is set at the feeding end of the frame (1) and includes a feeding support roller (21), a counterweight (22), a chain (23), a storage roller (24), a synchronous shaft (25), a first sprocket (26), a second sprocket (27), and a lower limit (28) and an upper limit (29) for material storage detection. The two ends of the synchronous shaft (25) are rotatably mounted on the frame (1) via bearings, and the synchronous shaft (25) is located behind the feeding support roller (21); a first sprocket (26) is fixedly installed near both ends of the synchronous shaft (25). The two ends of the feeding support roller (21) are respectively mounted on the frame (1) via a rotating shaft, and a second sprocket (27) is fixedly mounted on each side of the rotating shaft. The upper ends of the storage roller (24) are respectively fixedly connected to one end of the chain (23), and the other end of the chain (23) passes through the upper edge of the first sprocket (26) and the lower edge of the second sprocket (27) in sequence and extends vertically downward and is fixedly connected to the upper end of the counterweight (22); the storage roller (24) is located below the feeding support roller (21) and the synchronous shaft (25), and the storage roller (24) can be slidably mounted on the frame (1); The lower limit (28) and upper limit (29) of the material storage detection are respectively installed on the frame (1), located below and above the material storage roller (24), and are used to detect the upper and lower positions of the material storage roller (24); An automatic feeding mechanism (3) is located on the discharge side of the constant tension storage combined mechanism (2), and includes a lower feeding roller (32), an upper pressing roller (31), a feeding drive motor (33), and a cylinder floating clamping component (34); the lower feeding roller (32) and the upper pressing roller (31) are both extended horizontally and installed parallel to each other on the frame (1), with the lower feeding roller (32) located directly below the upper pressing roller (31), forming a clamping gap between them for the skin to pass through; the lower feeding roller (32) is located directly below the upper pressing roller (31). One end of the feeding roller (32) is connected to the output shaft of the feeding drive motor (33) through a transmission component and is driven to rotate by the feeding drive motor (33); both ends of the upper pressure roller (31) are installed at the output end of the cylinder floating clamping component (34), the cylinder body of the cylinder floating clamping component (34) is fixed on the frame (1), and the upper pressure roller (31) can float up and down under the drive of the cylinder floating clamping component (34) to change the clamping gap with the lower feeding roller (32); The cutting mechanism (4), located at the rear end of the automatic feeding mechanism (3), includes: A vertically arranged rectangular frame (41) forms a cutting bracket and is fixedly installed on the frame (1); A lower blade (42) is fixedly installed on the lower part of the rectangular frame (41); Multiple sets of cylinders (43) are mounted on top of the rectangular frame (41); A portal frame (44) is connected at its upper end to the lower end of the piston rod of the plurality of cylinders (43) in a synchronous manner, and is driven by the cylinders (43) to move vertically up and down. An upper blade (45) is mounted below a mounting plate (451), the middle of which is rotatably mounted in the middle of the portal frame (44) via a pivot (46). The upper blade (45) and the lower blade (42) form a scissor-like cross-cutting engagement. A set of spring clamping assemblies (47) includes a clamping block (471), a bolt (472), and a spring (473). The clamping block (471) is mounted on one end of the portal frame (44), one end of which is fixed to the portal frame (44), and the other end of which extends downward and is rotatably mounted with the bolt (472). The spring (473) is sleeved on the bolt (472). On the mounting plate (451), one end of the spring (473) presses against the inner side of the pressure block (471), and the other end of the spring (473) presses against the outer side of the upper end of the mounting plate (451), which is the side away from the lower blade (42). The spring (473) provides continuous tension to the mounting plate (451), so that the cutting edge of the upper blade (45) on the inner side of the lower end of the mounting plate (451) and the shearing surface of the lower blade (42) always remain in contact, and automatically compensate for the gap caused by blade wear. A set of linear guide mechanisms (48) is provided on the front side of the rectangular frame (41), and the rear side of the portal frame (44) is slidably engaged with the rectangular frame (41) through the linear guide mechanisms (48) to guide the lifting and lowering movement of the portal frame (44). A set of rack and pinion synchronization mechanism (49) includes two vertical racks (491), two rotating seats (492), a synchronization shaft (493), and two gears (494). The two vertical racks (491) are respectively installed on the left and right sides of the front side of the portal frame (44). The two rotating seats (492) are respectively installed on the left and right sides of the rectangular frame (41) and located outside the linear guide mechanism (48). The two ends of the synchronization shaft (493) are rotatably installed on the corresponding rotating seats (492). The two gears (494) are respectively installed on the synchronization shaft (493) near the two ends, and the two gears (494) mesh with the vertical racks (491) on the corresponding sides. The control system is electrically connected to the lower limit of material detection (28), the upper limit of material detection (29), the feeding drive motor (33), and the multiple sets of cylinders (43) of the cutting mechanism. The control system is a PLC controller with built-in process parameters for different interior parts products and a signal interface for linkage with the upstream glue scraping line.

[0008] Compared with the prior art, the present invention has the following beneficial effects: 1. Combining constant tension and material storage functions in one compact structure: By floating the material storage rollers up and down, material storage and constant tension can be achieved simultaneously. Compared with traditional separate solutions, the overall length is reduced, the footprint is smaller, and it is easier to integrate into the production line.

[0009] 2. Adjustable tension and easy operation: The tension of the skin can be linearly adjusted by adding or removing the weight of the counterweight, without the need for complicated adjustments.

[0010] 3. Anti-sticking design: The feeding support roller and the storage roller are coated with Teflon to prevent the surface from sticking after scraping, ensuring smooth conveying.

[0011] 4. Automatic compensation for blade wear gap: The spring clamping assembly continuously applies a pushing force to the upper blade mounting plate, ensuring that the upper blade edge is always in close contact with the cutting surface of the lower blade. The gap caused by blade wear during long-term use can be automatically compensated, reducing the frequency of machine downtime for adjustment and ensuring continuous cutting stability.

[0012] 5. Precise lifting guidance and forced synchronization: The linear guide mechanism ensures that the gantry frame rises and falls vertically and smoothly; the gear and rack synchronization mechanism forces the gantry frame to rise and fall completely synchronously on both sides, effectively preventing tilting, misalignment or blade jamming caused by uneven load, and adapting to high-speed continuous cutting.

[0013] 6. High cutting quality: The scissor-style cross-cutting combined with spring engagement results in a smooth, burr-free cut with a cutting accuracy of ±0.5mm.

[0014] 7. Seamless integration with the glue-scraping line: The control system receives the feeding signal from the upstream glue-scraping line, automatically starts feeding and cutting, realizes cycle production, and reduces manual intervention.

[0015] 8. High versatility and quick changeover: It can be adapted to different specifications of skin, and the changeover time is shortened from 45 minutes of traditional devices to less than 5 minutes. Attached Figure Description

[0016] Figure 1-2 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0017] Figure 3 This is a partially enlarged schematic diagram of the constant tension material storage combined mechanism.

[0018] Figure 4 This is a cross-sectional schematic diagram of the automatic feeding mechanism.

[0019] Figure 5-6 This is a schematic diagram of the front and rear of the cutting mechanism.

[0020] Figure 7 This is a partial sectional view of the cutting mechanism from the side.

[0021] In the diagram: 1 is the frame; 2 is the constant tension material storage combined mechanism; 21 is the feeding support roller; 22 is the counterweight; 23 is the chain; 24 is the storage roller; 241 is the guide shaft; 25 is the synchronous shaft; 26 is the first sprocket; 27 is the second sprocket; 28 is the lower limit of material storage detection; 29 is the upper limit of material storage detection; 3 is the automatic feeding mechanism; 31 is the upper pressure roller; 32 is the lower feeding roller; 33 is the feeding drive motor; 34 is the cylinder floating pressure... 4 is a fastener; 4 is a cutting mechanism; 41 is a rectangular frame; 42 is a lower blade; 43 is a cylinder; 44 is a portal frame; 45 is an upper blade; 451 is a mounting plate; 46 is a rotating shaft; 47 is a spring clamping assembly (471 is a pressure block, 472 is a bolt, 473 is a spring); 48 is a linear guide mechanism; 49 is a gear and rack synchronization mechanism (491 is a vertical rack, 492 is a rotating seat, 493 is a synchronization shaft, 494 is a gear). Detailed Implementation Example

[0022] like Figure 1-2 As shown, this embodiment provides a constant tension and material storage two-in-one automotive interior covering skin cutting device that is linked to the glue scraping line. It is arranged at the rear end of the glue scraping process and is used to automatically cut the automotive seat back panel covering skin that has been glued.

[0023] The device includes a frame 1, a constant tension material storage mechanism 2, an automatic feeding mechanism 3, a cutting mechanism 4, and a matching control system, all arranged sequentially on the frame 1 along the surface conveying direction.

[0024] 1. Rack 1 The frame 1 is a rectangular frame structure constructed from aluminum alloy profiles, with adjustable feet at the bottom. The length of the frame 1 is the direction of skin conveying, and the width direction accommodates skin widths up to 1200mm. The frame 1 has multiple mounting surfaces and threaded holes for fixing various mechanisms.

[0025] 2. Constant tension material storage combined mechanism 2 like Figure 2-3 As shown, the constant tension material storage combined mechanism 2 is located at the feeding end of the frame 1, integrating material storage and tensioning functions. The positions, connections, and mating relationships of each component are as follows: Synchronous shaft 25: This is a round steel shaft, with both ends rotatably mounted on the two vertical plates of the frame 1 via bearings. The synchronous shaft 25 is located behind the feeding support roller 21 (i.e., behind it along the surface conveying direction), with a center distance of approximately 300mm between them. A first sprocket 26 is fixedly mounted near both ends of the synchronous shaft 25 via key connections.

[0026] The feeding support roller 21 is a Teflon-coated steel roller with a diameter of 50 mm, and is internally fitted with a deep groove ball bearing. The feeding support roller 21 is rotatably mounted on bearing seats on both sides of the frame 1 via shafts at both ends. The portion of each shaft extending beyond the bearing seat is keyed to a second sprocket 27. The diameter of the second sprocket 27 is the same as that of the first sprocket 26, both being 60 mm.

[0027] Storage roller 24: This is a Teflon-coated roller with a diameter of 80mm and the same length as the feeding support roller 21. Connecting lugs are fixed to both ends of the storage roller 24 for connecting the chain 23. The storage roller 24 is located below the feeding support roller 21 and the synchronous shaft 25, and its two ends are slidably engaged with the guide shaft 241, which is vertically fixed to the frame 1, via linear bearings. This allows the storage roller 24 to move only vertically up and down along the guide shaft 241, while its horizontal movement is constrained.

[0028] Chains 23: There are two chains, arranged symmetrically on the left and right. One end of each chain 23 is fixedly connected to the corresponding connecting lug plate on the upper end of the storage roller 24 by a pin. The chain 23 extends upward, first passing over the upper edge of the first sprocket 26 on the synchronous shaft 25 (meshing with the first sprocket 26), then extending forward, passing over the lower edge of the second sprocket 27 on the rotating shaft of the feeding support roller 21 (meshing with the second sprocket 27), and then extending vertically downward, with the end connected to the upper end of the counterweight 22 by a hook. The counterweight 22 is a multi-piece cast iron block, each weighing 1kg, which can be stacked, and the total weight can be adjusted within the range of 2kg to 10kg as needed.

[0029] Material detection lower limit 28 and material detection upper limit 29: Both are photoelectric proximity switches with a detection distance of 10mm. The material detection lower limit 28 is fixedly installed on the lower part of the frame 1, located near the bottom of the storage roller 24 at its lowest position (i.e., when the material quantity is at its maximum). It triggers a signal when the storage roller 24 descends to the lower limit position. The material detection upper limit 29 is fixedly installed on the upper part of the frame 1, located near the top of the storage roller 24 at its highest position (i.e., when the material quantity is at its minimum). It triggers a signal when the storage roller 24 rises to the upper limit position.

[0030] Working mechanism: When the device is not feeding material or the feeding speed is less than the discharge speed of the scraper line, the skin accumulates in the storage area, pushing the storage roller 24 upward, and the counterweight 22 rises accordingly, increasing the storage amount. When the feeding mechanism starts to pull the skin out, the storage roller 24 moves downward under its own weight and the pulling force of the counterweight, pressing down on the skin and providing tension. By adjusting the weight of the counterweight 22, the tension of the skin can be precisely controlled, avoiding slack or overstretching.

[0031] 3. Automatic feeding mechanism 3 like Figure 4As shown, the automatic feeding mechanism 3 is fixed in the middle of the frame 1. Both the lower feeding roller 32 and the upper pressure roller 31 are rubber-coated soft rollers (the lower feeding roller 32 is made of silicone, with a hardness of 60 Shore A and a diameter of 80 mm; the upper pressure roller 31 is made of polyurethane, with a hardness of 50 Shore A and a diameter of 60 mm). They extend horizontally and are installed parallel to each other on the frame 1. The lower feeding roller 32 is located directly below the upper pressure roller 31, with an initial clamping gap of 0 mm between them (i.e., they are in contact). This gap is formed by the lifting of the upper pressure roller 31. Both ends of the lower feeding roller 32 are mounted on the frame 1 via bearing seats, and one end extends out of the shaft and is connected to the output shaft of the feeding drive motor 33 via a synchronous pulley and synchronous belt. The feeding drive motor 33 is a servo motor (rated torque 4 N·m, encoder resolution 2500 lines) and is fixed to the motor mount on the frame 1. The upper pressure roller 31 is mounted on a floating bracket via bearings at both ends. A cylinder floating clamping component 34 is connected above the floating bracket. The cylinder floating clamping component 34 consists of two parallel thin cylinders (32mm diameter, 30mm stroke), whose bodies are fixed to the upper crossbeam of the frame 1. The piston rods are connected to the floating bracket via floating joints. By adjusting the cylinder air pressure (0.2~0.6MPa), the upper pressure roller 31 can press the surface downwards with adjustable pressure, while simultaneously floating upwards according to the surface thickness, adapting to changes in thickness.

[0032] 4. Cutting mechanism 4 Cutting mechanism 4 adopts a gear synchronous shearing and cutting device with automatic backlash compensation, and its specific structure is as follows: Rectangular frame 41: A vertical frame made of aluminum alloy profiles, serving as the supporting skeleton of the cutting mechanism, and fixedly installed at the discharge end of the frame 1.

[0033] Lower blade 42: Fixedly installed at the lower part of the rectangular frame 41, with the blade edge set horizontally along the surface conveying direction.

[0034] Two sets of cylinders 43 are mounted side by side on the upper crossbeam of the rectangular frame 41. The lower ends of the piston rods of the two sets of cylinders are fixedly connected to the upper end of the portal frame 44 through a connecting plate.

[0035] Portal frame 44: It is inverted U-shaped, with its upper end fixed to the connecting plate 410, and the two side arms of the portal frame extending downwards. A slider is installed on the rear side (back side) of the portal frame 44.

[0036] Upper blade 45: It is long and narrow, and is installed below a mounting plate 451. The mounting plate 451 is rotatably mounted between the two arms of the portal frame 44 via a pivot 46, allowing the upper blade 45 to swing slightly around the pivot 46. The cutting edge of the upper blade 45 is opposite to the cutting edge of the lower blade 42, forming a scissor-like cross-cutting engagement.

[0037] Spring clamping assembly 47: A clamping block 471 is installed on one end of the portal frame 44 (e.g., the lower end of the right arm). One end of the clamping block 471 is bolted to the portal frame 44, and the other end extends downward beyond the upper outer side of the upper blade 45. An adjusting bolt 472 is rotatably mounted on this extended end, with its head facing outward and its thread passing through the clamping block 471. A spring 473 is fitted onto the adjusting bolt 472, with one end of the spring 473 pressing against the inner side of the clamping block 471 (i.e., the side facing the inner side of the portal frame), and the other end pressing against the upper outer side of the mounting plate 451 (i.e., the side away from the lower blade). The preload of the spring 473 can be changed by rotating the adjusting bolt 472. Spring 473 continuously applies a torque to the upper end of mounting plate 451 to rotate around shaft 46, so that the cutting edge of upper blade 45 on the inner side of lower end of mounting plate 451 is always in close contact with the shearing surface of lower blade 42.

[0038] Linear guide mechanism 48: A linear guide rail is vertically installed on each of the left and right sides of the front side (facing the portal frame) of the rectangular frame 41; a slider is installed on each of the left and right sides of the rear side of the portal frame 44, and the slider slides in cooperation with the corresponding linear guide rail, thereby precisely guiding the lifting and lowering movement of the portal frame 44.

[0039] Gear and rack synchronization mechanism 49: A rack 491 (tooth surface facing forward) is vertically installed on each of the left and right sides of the front of the portal frame 44; a rotating seat 492 is fixed on the left and right sides of the rectangular frame 41, located outside the linear guide mechanism 48; the two ends of a synchronization shaft 493 are rotatably mounted on the left and right rotating seats 492 via bearings; gears 494 are fixedly installed near the two ends of the synchronization shaft 493, and the two gears 494 mesh with the racks 491 on the corresponding sides. When the cylinder 43 drives the portal frame 44 to rise and fall, the racks 491 on both sides drive the corresponding gears 494 to rotate. Since the synchronization shaft 493 rigidly connects the two gears 494, the gears 494 on both sides must rotate synchronously, thereby forcing the lifting speed of the two sides of the portal frame 44 to be completely consistent and preventing tilting.

[0040] Proximity switch 413: Proximity switches can be installed on both sides of the connecting plate 410 to sense the upper surface of the lower rotating seat 492 to control the cylinder to stop descending.

[0041] 5. Control System The control system uses a Siemens S7-1200 series PLC, equipped with a 7-inch touchscreen. The PLC's input ports are connected via signal lines to the lower limit of material detection 28, the upper limit of material detection 29, and the linkage signal interface from the upstream scraping line. The output ports are connected via relays and drivers to the servo driver of the feeding drive motor 33 and the solenoid valve of the cutting drive component 43, respectively. The touchscreen has pre-stored process recipes for more than 10 products, including seat back panels, door panels, armrests, and center consoles. Each recipe includes: feeding length (accuracy 0.1mm), feeding speed (adjustable from 0 to 200mm / s), and cutting delay time (0 to 500ms).

[0042] Work process: The coated outer sheet is placed on the feeding support roller 21. The sheet is manually pulled through from below the storage roller 24 and then introduced between the upper pressure roller 31 and lower feeding roller 32 of the automatic feeding mechanism 3, before entering the cutting station (between the lower blade 42 and the upper blade 45). After starting the device, the control system first reads the signal of the lower limit of the storage detection 28: if the storage roller 24 has not reached the lower limit, the automatic feeding mechanism 3 pauses, waiting for incoming material; if it has been triggered, the control system sends a pulse command to the feeding drive motor 33 according to the feeding length and speed parameters of the selected product, causing the lower feeding roller 32 to rotate and smoothly convey the sheet forward. When the feeding length reaches the set value, the PLC sends a cutting signal, controlling the two sets of cylinders 43 of the cutting mechanism 4 to simultaneously extend their piston rods downwards, pushing the gantry frame 44 vertically downwards along the linear guide rail. During the descent, the racks 491 on both sides of the gantry frame 44 drive the gears 494 and the synchronous shaft 493 to rotate, ensuring synchronization on both sides. The upper blade 45 descends with the gantry frame 44, its cutting edge remaining in close contact with the cutting surface of the lower blade 42 under the pressure of the spring 473. When the cutting edges of the upper blade 45 and the lower blade 42 intersect, the skin is cut. After cutting, the cylinder 43 retracts, causing the gantry frame 44 to rise, the upper blade 45 to lift, and the skin continues to be conveyed. During long-term use, when blade wear causes increased clearance, the spring 473 automatically pushes the upper blade 45 to swing around the rotating shaft 46 to compensate for the wear clearance and ensure that the cutting is always complete. Each time the upstream glue scraping line completes the glue scraping of a skin, it sends a pulse signal to this device. Upon receiving the signal, this device starts a feeding and cutting cycle, realizing a linked production cycle. Example

[0043] This embodiment is basically the same as embodiment 1, except that: the cylinder 43 of the cutting mechanism 4 is set in three groups and arranged at equal intervals above the rectangular frame 41; the spring clamping assembly 47 is set in two groups and located at the two ends of the gate frame 44 respectively; the synchronous shaft 493 is a hollow shaft to reduce weight; and the proximity switch is a photoelectric proximity switch.

[0044] Performance testing: The apparatus described in Example 1 was used to conduct continuous cutting tests on the seat back panel cover leather (material: PVC leather, thickness 1.2mm, width 800mm) of a certain car model, with a total of 500 pieces tested. The results showed that the cutting length error was ≤±0.4mm, with no burrs or adhesive residue at the edges, and the cut surface was smooth and wrinkle-free; the linkage with the glue scraping line was smooth, with a single-piece cycle time of 1.8 seconds; the number of operators was reduced from 3 to 0.5 (part-time supervisors). Compared with manual cutting before the modification, the scrap rate decreased from 9.5% to 2.1%, and production efficiency increased by 4 times.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A constant tension and material storage integrated cutting device for automotive interior wrapping skin, linked to a glue scraper line, characterized in that, include: Rack (1); The constant tension material storage two-in-one mechanism (2) is set at the feeding end of the frame (1) and includes a feeding support roller (21), a counterweight (22), a chain (23), a storage roller (24), a synchronous shaft (25), a first sprocket (26), a second sprocket (27), and a lower limit (28) and an upper limit (29) for material storage detection. The two ends of the synchronous shaft (25) are rotatably mounted on the frame (1) via bearings, and the synchronous shaft (25) is located behind the feeding support roller (21); a first sprocket (26) is fixedly installed near both ends of the synchronous shaft (25). The two ends of the feeding support roller (21) are respectively mounted on the frame (1) via a rotating shaft, and a second sprocket (27) is fixedly mounted on each side of the rotating shaft. The upper ends of the storage roller (24) are respectively fixedly connected to one end of the chain (23), and the other end of the chain (23) passes through the upper edge of the first sprocket (26) and the lower edge of the second sprocket (27) in sequence and extends vertically downward and is fixedly connected to the upper end of the counterweight (22); the storage roller (24) is located below the feeding support roller (21) and the synchronous shaft (25), and the storage roller (24) can be slidably mounted on the frame (1); The lower limit (28) and upper limit (29) of the material storage detection are respectively installed on the frame (1), located below and above the material storage roller (24), and are used to detect the upper and lower positions of the material storage roller (24); An automatic feeding mechanism (3) is located on the discharge side of the constant tension storage combined mechanism (2), and includes a lower feeding roller (32), an upper pressing roller (31), a feeding drive motor (33), and a cylinder floating clamping component (34); the lower feeding roller (32) and the upper pressing roller (31) are both extended horizontally and installed parallel to each other on the frame (1), with the lower feeding roller (32) located directly below the upper pressing roller (31), forming a clamping gap between them for the skin to pass through; the lower feeding roller (32) is located directly below the upper pressing roller (31). One end of the feeding roller (32) is connected to the output shaft of the feeding drive motor (33) through a transmission component and is driven to rotate by the feeding drive motor (33); both ends of the upper pressure roller (31) are installed at the output end of the cylinder floating clamping component (34), the cylinder body of the cylinder floating clamping component (34) is fixed on the frame (1), and the upper pressure roller (31) can float up and down under the drive of the cylinder floating clamping component (34) to change the clamping gap with the lower feeding roller (32); The cutting mechanism (4), located at the rear end of the automatic feeding mechanism (3), includes: A vertically arranged rectangular frame (41) is fixedly installed on the frame (1); A lower blade (42) is fixedly installed on the lower part of the rectangular frame (41); Multiple sets of cylinders (43) are mounted on top of the rectangular frame (41); A portal frame (44) is connected at its upper end to the lower end of the piston rod of the plurality of cylinders (43) in a synchronous manner, and is driven by the cylinders (43) to move vertically up and down. An upper blade (45) is mounted below a mounting plate (451), the middle of which is rotatably mounted in the middle of the portal frame (44) via a pivot (46). The upper blade (45) and the lower blade (42) form a scissor-like cross-cutting engagement. A set of spring clamping components (47) includes a pressure block (471), a bolt (472) and a spring (473). The pressure block (471) is installed on one side end of the portal frame (44). The spring (473) is sleeved on the bolt (472), with one end pressing against the pressure block (471) and the other end pressing against the upper outer side of the mounting plate (451), so that the cutting edge of the upper blade (45) on the lower inner side of the mounting plate (451) and the shearing surface of the lower blade (42) always remain in contact. A set of linear guide mechanisms (48) is disposed on the front side of the rectangular frame (41), and the rear side of the portal frame (44) is slidably engaged with the rectangular frame (41) through the linear guide mechanisms (48). A set of rack and pinion synchronization mechanism (49) includes two vertical racks (491), two rotating seats (492), a synchronization shaft (493), and two gears (494). The two vertical racks (491) are respectively installed on the left and right sides of the front of the portal frame (44), the two rotating seats (492) are respectively installed on the left and right sides of the rectangular frame (41), the two ends of the synchronization shaft (493) are respectively rotatably installed on the corresponding rotating seats (492), and the two gears (494) are respectively installed on the synchronization shaft (493) near the two ends, and the two gears (494) respectively mesh with the vertical racks (491) on the corresponding sides. The control system is electrically connected to the lower limit of material detection (28), the upper limit of material detection (29), the feeding drive motor (33), and the multiple sets of cylinders (43) of the cutting mechanism. The control system is a PLC controller with built-in process parameters for different interior parts products and a signal interface for linkage with the upstream glue scraping line.

2. The apparatus according to claim 1, characterized in that: The feeding support roller (21) is a Teflon-coated roller with bearings installed inside.

3. The apparatus according to claim 1, characterized in that: Both the lower feeding roller (32) and the upper pressing roller (31) are rubber-coated soft rollers.

4. The apparatus according to claim 1, characterized in that: The shearing surface of the lower blade (42) has an inward bevel.

5. The apparatus according to claim 4, characterized in that: The angle of the oblique angle is 1.5 degrees.

6. The apparatus according to claim 1, characterized in that: The multiple sets of cylinders (43) are two or more sets, which are arranged side by side, and the lower end of the piston rod of all cylinders is fixedly connected to the upper end of the portal frame (44).

7. The apparatus according to claim 1, characterized in that: The linear guide mechanism (48) includes a linear guide rail vertically installed on the front side of the rectangular frame (41) and a slider fixed on the rear side of the portal frame (44), wherein the slider slides in cooperation with the linear guide rail.

8. The apparatus according to claim 1, characterized in that: The spring clamping assembly (47) is one or more sets. When there are multiple sets, each set of spring clamping assemblies (47) is arranged at intervals along the same side end of the portal frame (44).

9. The apparatus according to claim 1, characterized in that: The two ends of the storage roller (24) are slidably connected to the guide shaft (241) that is vertically fixed on the frame (1) via linear bearings.

10. The apparatus according to claim 1, characterized in that: A connecting plate (410) is fixed to the upper end of the portal frame (44). The connecting plate (410) is fixedly connected to the lower end of the piston rod of the multiple sets of cylinders (43). The left and right sides of the connecting plate (410) extend outward to form extensions. Each extension is equipped with a proximity switch (413). The proximity switch (413) is used to sense the upper surface of the corresponding rotating seat (492) below. When the upper surface of the rotating seat (492) is sensed, a signal is sent to control the cylinder (43) to stop descending.

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