Automatic punching and cutting device for ring-shaped sheet and operation method thereof

Abstract

An automatic punching and cutting device and operating method for steel strips include a base frame, a guide component for moving and guiding the steel strip, a drive device for driving the steel strip to move to the right along the guide component, a pressing device for fixing the position of the steel strip, and a punching and cutting device for punching and cutting the steel strip. The guide component includes a first guide device located to the left of the drive device and a second guide device located between the drive device and the pressing device. This invention, by incorporating the drive device, pressing device, and punching and cutting device, achieves fully automated operation of the entire process, including automatic fixed-length feeding, automatic pressing, automatic punching, automatic cutting, and automatic unloading of the steel strip. Operators only need to complete the initial threading once; all subsequent processes are automatically completed by the controller without manual intervention. Compared to traditional manual or semi-automatic processing methods, this invention significantly reduces labor intensity and substantially improves batch production capacity.

Description

Technical Field

[0001] This invention relates to the field of punching equipment technology, and in particular to an automatic punching and cutting device for expanding ring plates. Background Technology

[0002] The expansion ring is a key connecting component installed at the head of the dust collector filter bag. It is usually made of steel strip of a certain length through punching and riveting. Punching and cutting are the preceding processes in the formation of the expansion ring.

[0003] In existing technologies, the processing method for expansion ring sheets generally involves the operator first cutting the steel strip into fixed-length segments, then holding the cut segments and punching holes in each segment using a punching device. Because the steel strip segments have a certain length and rigidity, the operator must continuously grip the strip and maintain stability while simultaneously performing the punching operation. This results in high labor intensity, low operating efficiency, and prolonged operation can easily cause hand fatigue or even injury, making it difficult to meet the demands of mass production. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic punching and cutting device for expansion ring sheets, so as to solve the technical problem of low automation in traditional processing of expansion ring sheets.

[0005] To solve the above-mentioned technical problems, the present invention provides an automatic punching and cutting device for expansion ring strips, including a base frame, a guide component for moving and guiding the steel strip, a drive device for driving the steel strip to move to the right along the guide component, a pressing device for fixing the position of the steel strip, and a punching and cutting device for punching and cutting the steel strip; the guide component includes a first guide device disposed on the left side of the drive device, and a second guide device disposed between the drive device and the pressing device.

[0006] In a preferred embodiment, the first guiding device and the second guiding device have the same structure, each including a guide plate mounted on the base frame, a guide groove opened on the guide plate and matching the width of the steel strip, and a cover plate disposed above the guide groove; the two cover plates are connected as a whole.

[0007] In a preferred embodiment, the driving device includes a moving device mounted on a base frame and a pressing device disposed on the moving device. The moving device is provided with a movable slider. The pressing device includes a first wear-resistant plate and a first mounting bracket mounted above the slider. A first cylinder is disposed on the first mounting bracket. A first pressure head is disposed on the extension rod of the first cylinder, which is used to press the steel strip onto the first wear-resistant plate. The upper surface of the first wear-resistant plate is flush with the bottom wall of the guide groove. A cover plate is also disposed above the first wear-resistant plate, and the cover plate is provided with a through groove for the first pressure head to pass through.

[0008] In a preferred embodiment, the pressing device includes a mounting plate, a second wear-resistant plate, a second mounting frame, a second cylinder, and a second pressing head; the mounting plate is mounted on a base frame, and the second wear-resistant plate is disposed on the mounting plate; the upper surface of the second wear-resistant plate is flush with the bottom wall of the guide groove; the second mounting frame is disposed on one side of the mounting plate; the second cylinder is disposed on the second mounting frame; the second pressing head is disposed on the extension rod of the second cylinder, for pressing the steel strip onto the second wear-resistant plate.

[0009] In a preferred embodiment, a first inclined plate is provided on the left side of the guide plate, and two V-shaped guide wheels are provided on both sides of the first inclined plate, through which the steel belt passes.

[0010] In a preferred embodiment, a retaining plate is provided on both sides of a portion of the cover plate above the mobile device, and a retaining groove matching the thickness of the steel strip is formed between the retaining plate and the cover plate; the two sides of the steel strip in the width direction are respectively inserted into the corresponding retaining grooves.

[0011] In a preferred embodiment, the punching and cutting device includes a punching machine, and an upper module and a lower module disposed on the punching machine; the upper module is provided with a cutter and a punching cutter, and the lowest point of the punching cutter is lower than the lowest point of the cutter; the lower module is provided with a groove that matches the cutter and the punching cutter.

[0012] In the preferred embodiment, an air nozzle is also provided on one side of the stamping machine.

[0013] In a preferred embodiment, a second inclined plate is provided on the right side of the lower module, and a limit block is provided below the second inclined plate.

[0014] A method for operating an automatic punching and cutting device for expansion rings includes the following steps: Step 1: Pass the steel strip through the V-shaped guide wheel, the first guide device, the drive device, and the second guide device in sequence, and make its end reach the top of the lower module; Step 2: Control the first cylinder in the drive device to drive the first pressure head to press the steel strip tightly onto the first wear-resistant plate; Step 3: Based on the clamping signal of the first cylinder, control the slider of the moving device to move the clamping device to the right to the set position; Step 4: Based on the right-side positioning signal of the moving device, control the second cylinder of the pressing device to drive the second pressure head to press the steel strip tightly onto the second wear-resistant plate; Step 5: Based on the clamping signal from the second cylinder, simultaneously perform the following two actions: a) Control the first cylinder to release the steel strip, and according to the release signal of the first cylinder, control the moving device to drive the pressing device to move to the left and return to the initial position. b) Control the stamping press to drive the cutter and punching knife to punch and cut the steel strip; Step Six: Based on the completion signal of the stamping machine or the preset stamping delay, control the second cylinder of the pressing device to release the steel strip; Step 7: Based on the release signal of the second cylinder, control the first cylinder to press the steel strip tight again; Step 8: Repeat steps 3 to 7 to achieve continuous automatic punching and cutting.

[0015] Compared with existing technologies, the advantages of this invention are as follows: By setting up a driving device, a pressing device, and a punching and cutting device, this invention achieves fully automated operation of the entire process of automatic fixed-length feeding, automatic pressing, automatic punching, automatic cutting, and automatic unloading of steel strips. Operators only need to complete the initial threading once; all subsequent processes are automatically completed by the controller without manual intervention. Compared with traditional manual or semi-automatic processing methods, this invention significantly reduces labor intensity, rapidly increases single-machine production efficiency, and significantly improves batch production capacity. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a device layout diagram provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the first guiding device provided in an embodiment of the present invention; Figure 3 This is a structural diagram of the driving device provided in an embodiment of the present invention; Figure 4 This is a partially enlarged structural diagram of the driving device provided in an embodiment of the present invention; Figure 5 This is a top view of the cover plate structure provided in an embodiment of the present invention; Figure 6 This is a structural diagram of the pressing device provided in an embodiment of the present invention; Figure 7 This is a diagram of the first inclined plate installation structure provided in an embodiment of the present invention; Figure 8 This is a diagram of the V-shaped guide wheel installation structure provided in an embodiment of the present invention; Figure 9 This is a side view of the punching and cutting device provided in an embodiment of the present invention; Figure 10 This is a diagram of the second inclined plate installation structure provided in an embodiment of the present invention; Figure 11 This is a structural diagram of a stamping machine provided in an embodiment of the present invention.

[0017] Reference numerals: Steel strip 10; Base frame 11; First inclined plate 12; V-shaped guide wheel 13; Clamping plate 14; Clamping groove 141; Air nozzle 15; Second inclined plate 16; Limiting block 17; First guide device 21; Guide plate 212; Guide groove 2121; Cover plate 213; Through groove 214; Second guide device 22; Drive device 3; Slider 311; First mounting frame 32; First cylinder 33; First pressure head 34; First wear-resistant plate 35; Pressing device 4; Mounting plate 41; Second wear-resistant plate 42; Second mounting frame 43; Second cylinder 44; Second pressure head 45; Punching and cutting device 5; Punching machine 51; Upper module 52; Lower module 53; Cutting knife 54; Punching knife 55. Detailed Implementation

[0018] In the description of this invention, it should be understood that when terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] Example 1 Please see Figure 1-11 As shown, the present application provides a technical solution: an automatic punching and cutting device for expansion ring sheets, including a base frame 11, a guide component for moving and guiding a steel strip 10, a drive device 3 for driving the steel strip 10 to move to the right along the guide component, a pressing device 4 for fixing the position of the steel strip 10, and a punching and cutting device 5 for punching and cutting the steel strip 10; the guide component includes a first guide device 21 disposed on the left side of the drive device 3, and a second guide device 22 disposed between the drive device 3 and the pressing device 4.

[0020] In this embodiment, the automatic punching and cutting device for the expansion ring includes a base frame 11, which is a frame structure welded from rectangular steel pipes. The upper surface is milled flat and used to install and support the guide components; a drive device 3 and a pressing device 4; the punching and cutting device is an improvement on an existing punching machine 51 by replacing the upper and lower dies. Along the moving direction of the steel strip 10 (from left to right), the guide components, drive device 3, pressing device 4 and punching and cutting device 5 are sequentially installed on the base frame 11.

[0021] The guiding components are used to constrain and guide the movement trajectory of the steel strip 10, preventing it from shifting laterally or warping vertically during conveying. Specifically, the guiding components are divided into a first guiding device 21 and a second guiding device 22: the first guiding device 21 is installed on the left side of the drive device 3 (i.e., the steel strip entry side) to pre-guide the steel strip 10 before it enters the drive device 3; the second guiding device 22 is installed between the drive device 3 and the pressing device 4 to maintain the linear movement of the steel strip 10 after it leaves the drive device 3 and before it enters the punching and cutting area.

[0022] The drive device 3 is used to clamp the steel strip 10 and drive it to move intermittently to the right to achieve fixed-length feeding. The pressing device 4 is used to press the steel strip 10 from above during punching and cutting operations, fixing it in the working position and preventing the steel strip 10 from moving due to the punching force.

[0023] The punching and cutting device 5 is used to simultaneously or sequentially complete punching and cutting operations at predetermined positions on the steel strip 10. All the above devices work together to achieve fully automated production.

[0024] In a preferred embodiment, the first guide device 21 and the second guide device 22 have the same structure, each including a guide plate 212 mounted on the base frame 11, a guide groove 2121 opened on the guide plate 212 and matching the width of the steel strip 10, and a cover plate 213 disposed above the guide groove 2121; the two cover plates 213 are connected as a whole.

[0025] In this embodiment, the first guide device 21 and the second guide device 22 adopt the same structural design to facilitate manufacturing and assembly. Specifically, each guide device includes a guide plate 212, which is a long strip of steel plate and is fixedly mounted on the base frame 11 by bolts. A guide groove 2121 is provided along the length direction on the upper surface of the guide plate 212. The width of the guide groove 2121 is clearance-fitted with the width of the steel strip 10 (e.g., a clearance of 0.1-0.2 mm on one side), and the depth of the guide groove 2121 is slightly greater than the thickness of the steel strip 10 (e.g., 0.5-1 mm greater) to accommodate the steel strip 10 and limit its left and right swing. A cover plate 213 is provided directly above the guide groove 2121. The cover plate 213 is a long strip of flat plate and is fixedly connected to the guide plate 212 by screws. The distance between the lower surface of the cover plate 213 and the bottom surface of the guide groove 2121 is slightly greater than the thickness of the steel strip 10 (e.g., 0.1-0.3 mm greater) to prevent the steel strip 10 from arching upwards or jumping out of the guide groove 2121 during conveying. Furthermore, the cover plate 213 of the first guide device 21 and the cover plate 213 of the second guide device 22 are structurally integrated, i.e., a single long strip cover plate simultaneously covers the guide grooves 2121 of both the first and second guide devices 21 and 22. This simplifies assembly and ensures the flatness of the transition area between the two guide devices. This integral cover plate 213 is fixed to the two guide plates 212 by multiple screws.

[0026] In a preferred embodiment, the driving device 3 includes a moving device mounted on the base frame 11 and a pressing device disposed on the moving device. The moving device is provided with a movable slider 311. The pressing device includes a first wear-resistant plate 35 and a first mounting bracket 32 ​​mounted above the slider 311. A first cylinder 33 is disposed on the first mounting bracket 32. A first pressure head 34 is disposed on the extension rod of the first cylinder 33. The first pressure head 34 is used to press the steel strip 10 onto the first wear-resistant plate 35. The upper surface of the first wear-resistant plate 35 is flush with the bottom wall of the guide groove 2121. The cover plate 213 is above the first wear-resistant plate 35, and the cover plate 213 is provided with a through groove 214 for the first pressure head 34 to pass through.

[0027] In this embodiment, the driving device 3 includes two parts: a moving device and a pressing device.

[0028] The moving device employs a precision linear module (e.g., a rodless cylinder or a ball screw-type electric slide), which is fixedly mounted on the base frame 11. A slider 311, capable of reciprocating horizontally (left-right), is mounted on the moving device. The stroke of slider 311 is set according to the unfolded length of the expansion ring (typically 50-300mm), with a movement accuracy controlled within ±0.05mm. A clamping device is mounted on slider 311 and moves with it. The specific structure is as follows: A first wear-resistant plate 35 is fixed to the upper surface of slider 311 using countersunk screws. The first wear-resistant plate 35 is made of hardened mold steel (e.g., Cr12MoV), with a surface hardness ≥HRC55 and a roughness Ra≤0.4μm, to reduce friction with the steel strip 10 and extend its service life. The upper surface of the first wear-resistant plate 35 is precisely adjusted to the same horizontal plane as the bottom wall of the aforementioned guide groove 2121, ensuring that the steel strip 10 can smoothly transition from the guide device to the drive device 3. A first mounting bracket 32 ​​is fixed above the slider 311 (e.g., the side closer to the operator). The first mounting bracket 32 ​​is inverted L-shape or gate-shaped and spans across the top of the first wear-resistant plate 35. A first cylinder 33 is vertically mounted downwards on the horizontal arm of the first mounting bracket 32. The first cylinder 33 is a double-acting cylinder with a cylinder diameter selected according to the required clamping force (e.g., φ20mm) and a working air pressure of 0.4-0.6MPa. A first pressure head 34 is fixed to the end of the extension rod of the first cylinder 33 by a threaded connection. The lower surface of the first pressure head 34 is flat to ensure uniform pressure distribution during clamping. When the first cylinder 33 extends, the first pressure head 34 moves downwards, pressing the steel strip 10 onto the first wear-resistant plate 35. The aforementioned integral cover plate 213 also extends above the first wear-resistant plate 35, that is, the cover plate 213 spans the area of ​​the first guide device 21 and the drive device 3. A through slot 214 is provided on the cover plate 213 corresponding to the position of the first pressure head 34. The through slot 214 is an elongated slot, the size of which is larger than the cross-section of the first pressure head 34 (for example, 2-3 mm larger on each side) to allow the first pressure head 34 to pass through the cover plate 213 and move downward to press the steel strip 10, while also providing space for the first pressure head 34 to move with the slider 311. When driven, the steel strip 10 is located in the gap between the cover plate 213 and the first wear-resistant plate 35. The cover plate 213 also serves to prevent the steel strip 10 from warping upward.

[0029] In a preferred embodiment, the pressing device 4 includes a mounting plate 41, a second wear-resistant plate 42, a second mounting bracket 43, a second cylinder 44, and a second pressing head 45. The mounting plate 41 is mounted on the base frame 11, and the second wear-resistant plate 42 is disposed on the mounting plate 41. The upper surface of the second wear-resistant plate 42 is flush with the bottom wall of the guide groove 2121. The second mounting bracket 43 is disposed on one side of the mounting plate 41. The second cylinder 44 is disposed on the second mounting bracket 43. The second pressing head 45 is disposed on the extension rod of the second cylinder 44 and is used to press the steel strip 10 onto the second wear-resistant plate 42.

[0030] In this embodiment, the specific structure of the pressing device 4 is as follows: A mounting plate 41 is bolted to the base frame 11. The upper surface of the mounting plate 41 is milled, and its height is precisely adjusted to be flush with the bottom wall of the guide groove 2121 (height difference ≤ 0.05 mm). A second wear-resistant plate 42 is fixed to the upper surface of the mounting plate 41 with countersunk screws. The material and surface treatment of the second wear-resistant plate 42 are the same as those of the first wear-resistant plate 35 (Cr12MoV quenched, hardness ≥ HRC55, roughness Ra ≤ 0.4 μm). The upper surface of the second wear-resistant plate 42 is also flush with the bottom wall of the guide groove 2121 to ensure that the steel strip 10 can smoothly enter the pressing area after passing the drive device 3. A second mounting bracket 43 is bolted to one side of the mounting plate 41. The second mounting bracket 43 is L-shaped or gate-shaped, with its vertical arm fixed to the mounting plate 41 and its horizontal arm extending forward and positioned above the second wear-resistant plate 42. A second cylinder 44 is vertically mounted downwards on the horizontal arm of the second mounting bracket 43. The specifications of the second cylinder 44 are the same as those of the first cylinder 33 (cylinder diameter φ20mm, working air pressure 0.4-0.6MPa). A second pressure head 45 is fixed to the end of the extension rod of the second cylinder 44, and the lower surface of the second pressure head 45 is flat. When the second cylinder 44 extends, the second pressure head 45 moves downwards, pressing the steel strip 10 tightly onto the second wear-resistant plate 42. The parallelism between the lower surface of the second pressure head 45 and the upper surface of the second wear-resistant plate 42 is required to be ≤0.02mm to ensure that the clamping force is evenly distributed in the width direction of the steel strip 10. It should be noted that the end of the guide groove 2121 of the second guide device 22 is adjacent to the left side of the second wear-resistant plate 42. Therefore, after the steel strip 10 comes out of the second guide device 22, it directly enters the clamping area between the second wear-resistant plate 42 and the second pressure head 45 without interruption.

[0031] In a preferred embodiment, a first inclined plate 12 is provided on the left side of the guide plate 212, and two V-shaped guide wheels 13 are provided on both sides of the first inclined plate 12, through which the steel belt 10 passes.

[0032] To facilitate the smooth entry of the steel strip 10 from the feed drum into the first guide device 21 and avoid feeding difficulties caused by the coiling stress or shaking of the steel strip 10 itself, a first inclined plate 12 is also provided on the left side (i.e., upstream direction) of the guide plate 212 of the first guide device 21. The first inclined plate 12 is a thin stainless steel plate, with its left end extending downward or horizontally, and its right end attached to the left end face of the guide plate 212 and fixed by screws. The surface of the first inclined plate 12 is smooth and burr-free to reduce scratches on the surface of the steel strip 10.

[0033] On both sides (front and rear sides) of the first inclined plate 12 in the width direction, a V-shaped guide wheel 13 is installed via a fixed shaft and bearings. The V-shaped grooves of the two V-shaped guide wheels 13 are arranged opposite each other, and the center lines of the two V-shaped grooves are located in the same horizontal plane. The V-shaped guide wheels 13 are made of bearing steel, the angle of the V-shaped groove is 90°, and the bottom of the groove is rounded. The minimum distance between the two V-shaped guide wheels 13 (i.e., the distance between the bottoms of the V-shaped grooves) matches the width of the steel belt 10, and a gap of 0.2-0.5 mm is usually left. The steel belt 10 passes between the V-shaped grooves of the two V-shaped guide wheels 13. The V-shaped guide wheels 13 can center and guide the steel belt 10 and perform preliminary self-alignment, preventing the steel belt from swaying left and right due to curling stress. At the same time, the freely rotating V-shaped guide wheels 13 significantly reduce the feeding friction.

[0034] In a preferred embodiment, a retaining plate 14 is provided on both sides of the cover plate 213 above the mobile device, and a retaining groove 141 matching the thickness of the steel strip 10 is formed between the retaining plate 14 and the cover plate 213; the two sides of the steel strip 10 in the width direction are respectively inserted into the corresponding retaining groove 141.

[0035] To prevent the steel strip 10 from warping downwards during the driving process (especially when the slider 311 moves rapidly), clamping plates 14 are provided on both sides of the partial cover plate 213 above the moving device. The term "partial cover plate 213" refers to the section of cover plate 213 located directly above the moving device.

[0036] Specifically, a retaining plate 14 is fixed to each of the left and right sides (i.e., both sides in the width direction) of the cover plate 213 in this section. The retaining plate 14 is a long strip of metal with an L-shaped or right-angled bend in cross-section. The upper part of the retaining plate 14 is fixedly connected to the upper surface of the cover plate 213 by screws, and the lower part of the retaining plate 14 is bent inward to form an inwardly opening groove 141 between it and the side of the cover plate 213. The vertical height of the groove 141 is equal to the thickness of the steel strip 10 plus a clearance of 0.1-0.2 mm. In this embodiment, the width of the steel strip 10 is greater than the width of the slider 311. Therefore, when the steel strip 10 is placed on the first wear-resistant plate 35, its two edges in the width direction will extend beyond the two sides of the slider 311. During assembly, the two edges of the steel strip 10 are precisely engaged in the grooves 141 formed between the two retaining plates 14 and the cover plate 213. In this way, when the slider 311 moves the first wear-resistant plate 35, the steel strip 10 is confined in the narrow space between the slot 141 and the first wear-resistant plate 35, and cannot bend up or down or twist laterally, thus ensuring the straightness of the feeding direction and the accuracy of the feeding length.

[0037] In this embodiment, the stamping press 51 adopts the mechanical crank press structure of the prior art. Specifically, the stamping press 51 includes a machine body, and a motor, a rotating shaft, and a crankshaft mounted on the machine body.

[0038] A small pulley is mounted on the output shaft of the motor, and a large pulley is mounted on one end of the rotating shaft. The small pulley and the large pulley are connected by a belt, realizing the first-stage reduction transmission from the motor to the rotating shaft. A small gear is mounted on the other end of the rotating shaft, and a large gear meshing with the small gear is mounted on one end of the crankshaft, forming the second-stage reduction gear transmission. Through the combination of belt drive and gear drive, the high-speed rotation of the motor is reduced to the low-speed rotation of the crankshaft.

[0039] A connecting rod is mounted in the middle of the crankshaft, and a stamping slide is hinged to the lower end of the connecting rod. The stamping slide is slidably mounted in the guide rail of the machine body. The upper module 52 is fixedly connected below the stamping slide and moves up and down reciprocatingly with the stamping slide. The lower module 53 is fixedly mounted on the machine body, located directly below the upper module 52.

[0040] When the motor starts, power is transmitted sequentially through the small pulley, belt, and large pulley to the rotating shaft, and then through the pinion and large gears to the crankshaft. The rotational motion of the crankshaft is converted into the linear reciprocating motion of the stamping slide block via the connecting rod, thereby driving the cutter 54 and punching cutter 55 on the upper module 52 to perform punching and cutting operations on the steel strip 10. The working cycle of the stamping machine 51 is coordinated and controlled by the control system according to the feeding speed and processing requirements.

[0041] The stamping press 51 can also be a small pneumatic or servo-driven stamping press. The body of the stamping press 51 is fixed to the right end of the base frame 11, and a lower module 53 is fixed on its worktable. An upper module 52 is fixed on the slide of the stamping press 51. Two tools are mounted on the lower surface of the upper module 52: a cutter 54 and a punching cutter 55. The cutter 54 is a rectangular blade with a width greater than the width of the steel strip 10 and a flat cutting edge, used to completely cut the steel strip 10. The punching cutter 55 is a cylindrical punch (or a non-circular punch depending on the required hole shape of the expansion ring), used to punch positioning holes or functional holes in the steel strip 10. The relative positional relationship between the cutter 54 and the punching cutter 55 is as follows: along the moving direction of the steel strip 10, the punching cutter 55 is located to the right of the cutter 54, and the horizontal distance between them is equal to the design distance from the center of the hole on the expansion ring to the end. More importantly, in the vertical direction, the lowest point of the punching blade 55 is lower than the lowest point of the cutting blade 54, and the height difference between the two is equal to the thickness of the steel strip 10 plus 0.1-0.2 mm. The purpose of this design is that when the upper module 52 descends, the punching blade 55 first contacts the steel strip 10 and completes the punching; then the upper module 52 continues to descend a short distance before the cutting blade 54 contacts the steel strip 10 and completes the cutting. This "punching first, then cutting" sequence avoids material tearing or deformation caused by the simultaneous impact of two blades on the steel strip 10. The upper surface of the lower module 53, corresponding to the blade positions of the upper module 52, has corresponding grooves and discharge holes: a continuous discharge groove (slightly wider than the blade thickness) corresponding to the position of the cutting blade 54, and a discharge hole (slightly larger in diameter than the punching blade) corresponding to the position of the punching blade 55. These grooves and discharge holes extend through the lower module 53, allowing the waste generated during punching to fall freely and be discharged, preventing blockage.

[0042] In a preferred embodiment, an air nozzle 15 is also provided on one side of the stamping machine 51.

[0043] In order to promptly remove the tiny metal shavings or powder generated during the punching and cutting process, and to prevent these shavings from accumulating on the upper surface of the lower module 53 and affecting the flatness of the steel strip 10 or scratching the surface of the steel strip, an air nozzle 15 is fixed on one side of the stamping machine 51 (e.g., the left or rear side of the lower module 53).

[0044] The air nozzle 15 is an adjustable-direction copper or plastic nozzle connected to a compressed air source (pressure 0.4-0.6 MPa) via an air pipe and controlled by a solenoid valve. The air outlet of the air nozzle 15 is aimed at the upper surface of the lower module 53, particularly the working area corresponding to the cutter 54 and punch 55. During automatic operation, after each punching action (or every 2-3 punching cycles), the control system opens the solenoid valve for 0.5-1 seconds, and compressed air is ejected at high speed from the air nozzle 15, blowing debris from the lower module 53 away from the working area and into the waste collection box below. This design effectively improves the cleanliness and consistency of the processing.

[0045] In a preferred embodiment, a second inclined plate 16 is provided on the right side of the lower module 53, and a limit block 17 is provided below the second inclined plate 16.

[0046] After the punching and cutting device 5 completes one cutting action, the finished expansion ring piece, separated from the steel strip 10, is located on the right side of the lower module 53. With the center of gravity of the finished steel strip 10 below the lower module 53, the finished steel strip 10 can automatically flip and fall into the collection container on the right. A second inclined plate 16 is installed on the right side of the lower module 53 to provide a rebound force to the finished steel strip 10, so that the finished steel strip 10 falls quickly into the collection container on the right.

[0047] The second inclined plate 16 is made of a flexible stainless steel sheet. Its left end is close to the right side of the lower module 53 (or slightly inserted below the lower module 53), and its right end extends upward at an angle, pointing towards the finished product collection box. The inclination angle of the second inclined plate 16 is typically 15°-30°, and its surface is smooth and burr-free.

[0048] When the second pressure head 45 of the pressing device 4 presses down on the steel strip 10, the steel strip 10 presses down on the second inclined plate 16, causing it to elastically deform until it contacts the lower limiting block 17. After the punching and cutting operation is completed and the second pressure head 45 retracts, the second inclined plate 16 uses its own rebound force to quickly bounce the cut expansion ring piece upwards, causing it to leave the working area of ​​the lower module 53 and fall into the collection container on the right.

[0049] It should be noted that even without the elastic force of the second inclined plate 16, the cut expansion ring piece will automatically flip to the right due to its own gravity, since its center of gravity has exceeded the support range of the second inclined plate 16. Adding the second inclined plate 16 and utilizing its rebound force can significantly accelerate the flipping speed of the finished product, thereby improving the reliability and cycle time of production.

[0050] The limiting block 17 is fixedly installed on the body of the stamping machine 51 by bolts. Its function is to limit the extreme position of the downward elastic deformation of the second inclined plate 16 and prevent the second inclined plate 16 from undergoing permanent plastic deformation or damage due to excessive downward pressure.

[0051] Example 2 A method for operating an automatic punching and cutting device for expansion rings includes the following steps: Step 1 (Initial Threading): Before the equipment is started for the first time, the operator manually pulls out the end of the coiled steel strip 10 and passes it through the gap between the two V-shaped guide wheels 13, the guide groove 2121 of the first guide device 21, the gap between the cover plate 213 and the first wear-resistant plate 35 in the drive device 3, and the guide groove 2121 of the second guide device 22 in sequence. Finally, the end of the steel strip 10 is pushed above the lower module 53 so that its end exceeds the cutting position of the cutter 54 by a set length (this length is equal to the unfolded length of a tensioning piece).

[0052] Step 2 (Initial Pressing): The controller outputs a signal to energize the solenoid valve of the first cylinder 33 in the drive device 3. The first cylinder 33 extends, driving the first pressure head 34 to move downward through the through groove 214, pressing the steel strip 10 onto the first wear-resistant plate 35. After the magnetic induction switch on the first cylinder 33 detects that the piston is in place, it sends a "pressing in place" signal.

[0053] Step 3 (Feeding): After receiving the clamping signal from the first cylinder 33, the controller immediately sends a pulse command to the moving device (e.g., a servo electric slide), driving the slider 311 to move the entire clamping device (including the first wear-resistant plate 35, the first mounting bracket 32, the first cylinder 33, etc.) to the right by a set step distance. This step distance is equal to the unfolded length of a tension ring (also equal to the distance between punching and cutting). The encoder or limit switch inside the moving device sends a "right side in position" signal after reaching the target position.

[0054] Step 4 (Pre-pressing): After receiving the right-side positioning signal from the moving device, the controller immediately outputs a signal to energize the solenoid valve of the second cylinder 44 of the pressing device 4. The second cylinder 44 extends, and the second pressing head 45 presses the steel strip 10 onto the second wear-resistant plate 42. The magnetic induction switch on the second cylinder 44 sends a "pressing in place" signal.

[0055] Step 5 (Parallel Execution): After receiving the clamping signal from the second cylinder 44, the controller simultaneously initiates the following two parallel actions: a) Release and return: The controller de-energizes the solenoid valve of the first cylinder 33, causing the first cylinder 33 to retract and the first pressure head 34 to lift upward, releasing the steel strip 10. After the magnetic induction switch on the first cylinder 33 sends a "release in place" signal, the controller immediately sends a reverse pulse command to the moving device, driving the slider 311 to move the pressing device to the left and return to the initial position (i.e., zero position) before the start of step three.

[0056] b) Punching and Cutting: The controller simultaneously sends a start signal to the punching machine 51. The punching machine 51 drives the upper module 52 downward. Since the lowest point of the punching cutter 55 is lower than the lowest point of the cutter 54, the punching cutter 55 first pierces the steel strip 10 to complete the punching; the upper module 52 continues to descend, and the cutter 54 then contacts the steel strip 10 and cuts it, forming a ring-shaped piece with a hole. After the punching machine 51 completes one stroke, the punching slide automatically returns to its original position and sends a "punching complete" signal to the controller.

[0057] Step 6 (Release after punching): When the controller receives the "punching complete" signal from the punching machine 51 (or after a preset punching delay time), it controls the second cylinder 44 of the pressing device 4 to de-energize the solenoid valve, the second cylinder 44 retracts, the second press head 45 lifts upward, and the steel strip 10 is released.

[0058] Step 7 (Re-pressing): After the magnetic induction switch on the second cylinder 44 sends a "release in place" signal, the controller controls the first cylinder 33 to extend again, and the first pressure head 34 presses the steel strip 10 onto the first wear-resistant plate 35 again.

[0059] Step 8 (Cyclic Execution): The controller repeats steps 3 to 7 above. That is: clamping → feeding → pressing → (releasing return and punching / cutting in parallel) → releasing the pressing → clamping again, and so on in a cyclical manner. Each cycle feeds forward one pitch of steel strip 10 and punches out one expansion ring piece, achieving continuous automatic production.

[0060] During the entire automatic operation, the air nozzle 15 is triggered by the controller to blow air for 0.5 seconds after each stamping to remove debris; the first inclined plate 12 and the V-shaped guide wheel 13 continuously provide feeding guidance; the second inclined plate 16 slides the finished product cut each time into the collection box; the limit block 17 ensures the stability of the position of the second inclined plate 16. The working air pressure of each cylinder is uniformly adjusted to 0.5MPa to ensure sufficient clamping force without damaging the surface of the steel strip 10. The feeding speed of the moving device and the working frequency of the stamping machine 51 are matched. Typically, one feeding takes 0.5-1 second, and one stamping takes 0.3-0.5 seconds. The overall production efficiency of the machine can reach 30-60 expansion ring pieces per minute.

[0061] The aforementioned steel strip 10 can be fed through a steel strip coil. To calculate the number of completed steel strips, the number of times the magnetic induction switch on the second cylinder 44 is opened and closed can be calculated. Opening and closing one side can complete the punching of one side, that is, complete one piece of material.

[0062] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described herein, including equivalent substitutions of the technical features described herein. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An automatic punching and cutting device for expansion rings, characterized in that, It includes a base frame (11), a guide component for moving and guiding the steel strip (10), a drive device (3) for driving the steel strip (10) to move to the right along the guide component, a pressing device (4) for fixing the position of the steel strip (10), and a punching and cutting device (5) for punching and cutting the steel strip (10); the guide component includes a first guide device (21) disposed on the left side of the drive device (3), and a second guide device (22) disposed between the drive device (3) and the pressing device (4).

2. The automatic punching and cutting device for expansion rings according to claim 1, characterized in that, The first guide device (21) and the second guide device (22) have the same structure, both including a guide plate (212) mounted on the base frame (11), a guide groove (2121) opened on the guide plate (212) and matching the width of the steel strip (10), and a cover plate (213) set above the guide groove (2121); the two cover plates (213) are connected as a whole.

3. The automatic punching and cutting device for expansion rings according to claim 2, characterized in that, The driving device (3) includes a moving device mounted on the base frame (11) and a pressing device mounted on the moving device. The moving device is provided with a movable slider (311). The pressing device includes a first wear-resistant plate (35) and a first mounting bracket (32) mounted above the slider (311). The first mounting bracket (32) is provided with a first cylinder (33). The extension rod of the first cylinder (33) is provided with a first pressure head (34), which is used to press the steel strip (10) onto the first wear-resistant plate (35). The upper surface of the first wear-resistant plate (35) is flush with the bottom wall of the guide groove (2121). The cover plate (213) is also provided above the first wear-resistant plate (35), and the cover plate (213) is provided with a through groove (214) through which the first pressure head (34) passes.

4. The automatic punching and cutting device for expansion rings according to claim 1, characterized in that, The pressing device (4) includes a mounting plate (41), a second wear-resistant plate (42), a second mounting bracket (43), a second cylinder (44), and a second pressing head (45); the mounting plate (41) is mounted on the base frame (11), and the second wear-resistant plate (42) is disposed on the mounting plate (41); and the upper surface of the second wear-resistant plate (42) is flush with the bottom wall of the guide groove (2121); the second mounting bracket (43) is disposed on one side of the mounting plate (41); the second cylinder (44) is disposed on the second mounting bracket (43); the second pressing head (45) is disposed on the extension rod of the second cylinder (44) for pressing the steel strip (10) onto the second wear-resistant plate (42).

5. The automatic punching and cutting device for expansion rings according to claim 2, characterized in that, A first inclined plate (12) is also provided on the left side of the guide plate (212), and two V-shaped guide wheels (13) are provided on both sides of the first inclined plate (12), and the steel belt (10) passes between the two V-shaped guide wheels (13).

6. The automatic punching and cutting device for expansion rings according to claim 3, characterized in that, On both sides of the cover plate (213) above the mobile device, there are also clamping plates (14), and a groove (141) matching the thickness of the steel strip (10) is formed between the clamping plate (14) and the cover plate (213); the two sides of the steel strip (10) in the width direction are respectively inserted into the corresponding groove (141).

7. The automatic punching and cutting device for expansion rings according to claim 1, characterized in that, The punching and cutting device (5) includes a punching machine (51), and an upper module (52) and a lower module (53) disposed on the punching machine (51); the upper module (52) is provided with a cutter (54) and a punching cutter (55), and the lowest point of the punching cutter (55) is lower than the lowest point of the cutter (54); the lower module (53) is provided with a groove that matches the cutter (54) and the punching cutter (55).

8. The automatic punching and cutting device for expansion rings according to claim 7, characterized in that, An air nozzle (15) is also provided on one side of the stamping machine (51).

9. The automatic punching and cutting device for expansion rings according to claim 7, characterized in that, A second inclined plate (16) is also provided on the right side of the lower module (53), and a limit block (17) is provided below the second inclined plate (16).

10. A method for operating the automatic punching and cutting device for expansion rings as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Pass the steel strip (10) through the V-shaped guide wheel (13), the first guide device (21), the drive device (3), and the second guide device (22) in sequence, and make its end reach the top of the lower module (53); Step 2: Control the first cylinder (33) in the drive device (3) to drive the first pressure head (34) to press the steel strip (10) onto the first wear-resistant plate (35); Step 3: Based on the pressing signal of the first cylinder (33), control the slider (311) of the moving device to move the pressing device to the right to the set position; Step 4: According to the right-side positioning signal of the moving device, control the second cylinder (44) of the pressing device (4) to drive the second pressing head (45) to press the steel strip (10) onto the second wear-resistant plate (42); Step 5: Based on the clamping signal from the second cylinder (44), simultaneously perform the following two actions: a) Control the first cylinder (33) to release the steel belt (10), and according to the release signal of the first cylinder (33), control the moving device to drive the pressing device to move to the left and return to the initial position; b) Control the punching machine (51) to drive the cutter (54) and punching knife (55) to punch and cut the steel strip (10); Step 6: Based on the completion signal of the stamping machine (51) or the preset stamping delay, control the second cylinder (44) of the pressing device (4) to release the steel strip (10). Step 7: Based on the release signal of the second cylinder (44), control the first cylinder (33) to press the steel strip (10) again. Step 8: Repeat steps 3 to 7 to achieve continuous automatic punching and cutting.

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