Rotary trimming shear

Abstract

A rotary trimming shear, comprising a base, two shear bodies symmetrically and slidably connected to the base, an opening adjustment device, and a power device. Each shear body comprises a frame, and an upper cutter disc assembly, a lower cutter disc assembly, and a transmission assembly which are arranged on the frame; a first spur gear is connected to a cutter shaft of the upper cutter disc assembly, a second spur gear is connected to a cutter shaft of the lower cutter disc assembly, and a helical gear is connected to a transmission shaft sleeve of the transmission assembly; the first spur gear, the second spur gear, and the helical gear are transmittingly connected in sequence; the axis of the cutter shaft of the upper cutter disc assembly is arranged in parallel with the axis of the cutter shaft of the lower cutter disc assembly; a helix angle of the helical gear and an included angle between the axis of the cutter shaft of the upper cutter disc assembly and the axis of the transmission shaft sleeve of the transmission assembly are each equal to a cutter disc swing angle of the rotary trimming shear; and helical gears on the two shear bodies have opposite helix directions. The present application can achieve axis coincidence arrangement of the transmission shaft sleeves of the shear bodies on both sides while ensuring that the shear bodies on both sides have the required cutter disc swing angle.

Description

Edge-cutting disc shears

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202510123167.5, filed on January 26, 2025, and incorporates the entire contents of the aforementioned patent application as part of this application. Technical Field

[0003] This application relates to the field of edge-trimming disc shears, and in particular to an edge-trimming disc shear. Background Technology

[0004] With the improvement of living standards and the development of technology, the food-grade cold-rolled strip finishing unit - electroplating tin continuous unit has developed rapidly. Its product, electroplated tin sheet, is widely used in food packaging, canning and other food industries. Due to the high price of tin sheet and the high added value of the product, the market demand is strong and it has been favored by many steel mills.

[0005] The tin-plating sheets are very thin, typically 0.1–0.6 mm thick, requiring extremely high production speeds for the units to achieve large-scale production capacity. Currently, the maximum stable production speed of the tin-plating units has reached 450 m / min, with the maximum production speed at the inlet and outlet sections reaching 550 m / min, placing extremely stringent requirements on the edge-cutting disc shears equipped in the units.

[0006] The main functions of the tin plating unit equipped with the edge-cutting disc shear are: firstly, to cut the edges of the strip steel at high speed to obtain a high-quality sheared section, remove edge defects, and prevent the creation of new defects; secondly, to meet the width and length accuracy requirements of the finished steel coil.

[0007] To meet the shearing process requirements of the disc shear, the blades on both sides of the disc shear must have a strictly applicable swing angle relative to the strip steel. The value and direction of this swing angle are extremely strict and cannot be changed during strip steel shearing; otherwise, serious edge quality defects will occur.

[0008] In recent years, with the optimization of the electroplating tin unit production process, the edge-trimming disc shear has been placed at the unit's inlet section. This inlet trimming removes edge defects from the raw material coils, preventing scratches on the numerous rubber-coated rollers within the unit. Since the maximum production speed at the inlet section is 550 m / min, and considering that the disc shear's cutting speed needs to have a certain lead over the strip speed, the maximum cutting speed of the edge-trimming disc shear reaches 560 m / min. This means the disc shear needs to trim the thinnest strip, as thin as 0.1 mm, at an ultra-high speed of 560 m / min. This places even more stringent requirements on the cutting accuracy and stability of the edge-trimming disc shear operating at ultra-high speeds.

[0009] Firstly, the edge cutting quality requirements for 0.1mm ultra-thin sheets include: First, the burr height should not exceed 0.005mm. Since tinplate is mainly used in the food canning industry, its surface trademarks and patterns are achieved through multi-color printing. Even slightly large burrs on the edge of the strip can lead to inaccurate steel plate positioning during multi-color printing, resulting in defects such as color ghosting and blurred patterns, leading to product scrap. Therefore, high-grade tinplate has extremely high requirements for burr removal. Consequently, the disc shear must maintain extremely high precision on the shear head end face and operate stably at 900rpm high-speed rotation, with no change in shearing accuracy. Second, the finished steel coil width accuracy requirement is 0-0.2mm. Since the disc shear is located at the inlet section, if the edge width accuracy does not meet the process requirements, it can lead to a downgrade of the finished coil or even a shutdown of the unit and the generation of scrap. Therefore, the disc shear must be easy and flexible to adjust the opening, accurately positioned, without any jamming, and the opening guide device must be stable and reliable, with positioning and repeatability accuracy meeting the above requirements. Third, no new shearing defects, such as shear edge waviness, should appear after trimming. This requires that the shear body drive shaft and cutter shaft operate stably and without vibration when shearing at high speed. Within the adjustment range of the cutter head opening, the size and direction of its swing angle must not change. If any changes occur, it will lead to quality defects such as shear edge waviness, resulting in product downgrading or even scrapping.

[0010] Secondly, there is the stability requirement during ultra-high-speed shearing at 560m / min. Since the thinnest tinplate strip is 0.1mm thick, the disc shear needs to be driven by an AC variable frequency motor. At this time, the rotation speed of the shear blades on both sides reaches 900rpm. The stability and synchronization of the high-speed rotation of the shear blade shafts on both sides are extremely important. If the synchronization and stability are slightly poor, quality defects such as shear edge waviness and increased burrs will occur, and the surface of the rubber roller will be scratched.

[0011] Therefore, during high-speed edge cutting, the high-speed operation of the disc shear's transmission system and the shear body's cutter shaft must remain stable, smooth, and vibration-free, without affecting the shearing accuracy of the disc. However, current disc shears cannot guarantee the stability of both sides of the shear body under high-speed rotation of the cutter shaft. Summary of the Invention

[0012] Currently, the swing angle of the cutting disc shear is obtained by symmetrically swinging the two shear bodies symmetrically around the center of the coupling between the drive shafts of the two shear bodies. The trajectory of the shear disc and the relationship between the machine's axes are shown in Figure 1. The adjustment device for the opening between the two shear discs is a variable frequency motor that drives two ball screws (one left-handed and one right-handed, connected by a coupling) to rotate simultaneously. This drives the two shear bodies to move synchronously towards or away from each other, thereby adjusting the distance (opening) between the two shear discs. It can be seen that to avoid motion interference during opening adjustment, the two ball screws are also symmetrically swinging around the center of the coupling with the same swing angle. That is, when adjusting the opening, the two shear bodies move synchronously towards or away from each other along the inclined drive shaft axis on the guide rail.

[0013] Therefore, the existing disc shear for edge trimming has the following problems: First, the drive shafts of the two shear bodies are not aligned, causing vibration during high-speed shearing and severely affecting the shearing quality; Second, during actual assembly, it is impossible to unify the assembly benchmark for testing and to achieve strict parallelism between the drive shaft axis, ball screw axis, and guide rail of each side of the shear body, resulting in minor changes in the cutter head swing angle, and serious accidents such as equipment jamming, interference, and damage when adjusting the opening degree; Third, when the parallelism of the drive shaft axis, ball screw axis, and guide rail of each side of the shear body is slightly poor, the ball screw is prone to jamming and damage; Fourth, because the assembly benchmark cannot be unified, the workload of reassembly and adjustment is large after replacing vulnerable spare parts such as ball screws, resulting in poor interchangeability of vulnerable spare parts.

[0014] The purpose of this application is to provide a cutting disc shear that at least solves one of the aforementioned problems of existing cutting disc shears.

[0015] The above-mentioned objectives of this application can be achieved by the following technical solutions:

[0016] This application provides a cutting disc shear for cutting continuous strip plates, comprising: a base; two shear bodies symmetrically slidably connected to the base, each shear body including a frame and an upper cutter head assembly, a lower cutter head assembly, and a transmission assembly disposed on the frame; a first spur gear connected to the cutter shaft of the upper cutter head assembly, a second spur gear connected to the cutter shaft of the lower cutter head assembly, and a helical gear connected to the transmission shaft sleeve of the transmission assembly; the first spur gear, the second spur gear, and the helical gear being sequentially connected in a transmission manner; the cutter shaft axis of the upper cutter head assembly being parallel to the cutter shaft axis of the lower cutter head assembly; the helix angle of the helical gear, the included angle between the cutter shaft axis of the upper cutter head assembly and the transmission shaft sleeve axis of the transmission assembly being equal to the cutter head swing angle of the cutting disc shear; and the helical gears on the two shear bodies having opposite rotation directions; and an opening adjustment device including a first drive unit and a first transmission unit connected in a transmission manner. The first drive unit is mounted on the base via a connecting bearing seat. The first drive unit is connected to the frame of the two shear bodies. Driven by the first drive unit, the first drive unit can drive the two shear bodies to move synchronously towards or away from the base to control the cutting width of the continuous strip to be cut. The power unit includes a second drive unit and a second drive unit connected by transmission. The second drive unit is fixedly mounted on the base. The two shear bodies are connected to the second drive unit via a transmission shaft sleeve. A sliding element slidably connected to the second drive unit is connected inside the transmission shaft sleeve, allowing the shear bodies to move along the second drive unit under the drive of the first drive unit. Under the drive of the second drive unit, the second drive unit can drive the transmission shaft sleeve to rotate, causing the cutter heads on the two shear bodies to rotate synchronously to cut the edges of the continuous strip to be cut.

[0017] The features and advantages of this application include: The edge-cutting disc shear provided in this application, by opening a first and a second assembly hole with parallel center lines on the frame of the shear body, and a third assembly hole forming an angle equal to the blade tilt angle of the edge-cutting disc shear between the center line and the center line of the first or second assembly hole, allows the shear body to be coaxially connected to the second transmission unit via a transmission shaft sleeve. This creates a blade tilt angle between the axial directions of the upper and lower blade assembly and the axial direction of the second transmission unit. Combined with spatial gear transmission technology, this achieves the power transmission for the rotation of the upper and lower blades, ensuring that the symmetrically arranged shear bodies on both sides have the required blade tilt angle while simultaneously ensuring the transmission of power between the two sides... The axes of the moving bushings are coincident, thus achieving coaxial arrangement of the transmission components of both sides of the shear body (including the transmission components of the first transmission unit connected to both sides of the shear body and the transmission components of the second transmission unit connected to both sides of the shear body). This solves the problem in traditional disc shear designs where the symmetrical swing angle of the blade disc on both sides of the shear body causes the transmission components of both sides of the shear body to be out of axis, resulting in vibration during high-speed shearing and seriously affecting the shearing quality. At the same time, the coaxial arrangement of the transmission components of both sides of the shear body is beneficial for detecting and ensuring the parallelism between the axes of the first transmission unit, the second transmission unit, and the movement path of the shear body relative to the base during assembly, reducing the workload of equipment replacement and maintenance, and improving the interchangeability of the edge-cutting disc shear. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0019] Figure 1 is a schematic diagram of the front view of the cutting disc shear provided in the embodiment of this application;

[0020] Figure 2 is a top view of the cutting disc shear provided in the embodiment of this application;

[0021] Figure 3 is a schematic diagram of the AA cross-sectional structure in Figure 1;

[0022] Figure 4 is a schematic diagram showing the connection between the first transmission unit and the base of the edge-cutting disc shear provided in the embodiment of this application;

[0023] Figure 5 is a schematic diagram showing the centerline relationship of each assembly hole on the frame of the edge-cutting disc shear provided in the embodiment of this application;

[0024] Figure 6 is a schematic diagram showing the centerline relationship of each component of the edge-cutting disc shear provided in the embodiment of this application in the assembled state;

[0025] Figure 7 is a schematic diagram of the connecting components in the opening adjustment device of the edge-cutting disc shear provided in the embodiment of this application;

[0026] Figure 8 is a schematic diagram of the connection between the connecting sleeve and the intermediate sleeve in the opening adjustment device of the cutting disc shear provided in the embodiment of this application.

[0027] Reference numerals: 1. Base; 11. Guide plate; 2. Shear body; 21. Frame; 211. Connecting part; 212. Copper sliding plate; 22. Upper cutter head assembly; 23. Lower cutter head assembly; 24. Transmission assembly; 25. First spur gear; 26. Second spur gear; 27. Helical gear; 28. Transmission shaft sleeve; 29. ​​Sliding component; 3. Opening degree adjustment device; 31. First drive unit; 311. Opening degree adjustment motor; 312. Second reducer; 32. First transmission unit; 321. Connecting assembly; 3211. Lead screw nut; 3212. Intermediate sleeve; 3213. Connecting sleeve; 322. Coupling; 323. Ball screw; 324. Connecting bearing seat; 33. Absolute encoder; 4. Power unit; 41. Second drive unit; 411. Drive motor; 412. First coupling; 413. First reducer; 414. Second coupling; 42. Second transmission unit; 421. Transmission coupling; 422. Transmission shaft; 423. Transmission bearing housing; a. Center of tooth width; b. Guide surface; α. Cutter head tilt angle. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] As shown in Figures 1 to 4, this application provides a cutting disc shear for cutting continuous strip plates. The direction of movement of the continuous strip plate is shown by the arrows in Figures 1, 2, and 4. In this embodiment, the continuous strip plate is mainly an extremely thin strip steel with a thickness range of 0.1mm to 0.5mm. The cutting disc shear includes a base 1, two shear bodies 2 symmetrically slidably connected to the base 1, an opening adjustment device 3, and a power device 4. The shear body 2 includes a frame 21 and an upper cutter head assembly 22, a lower cutter head assembly 23, and a transmission assembly 24 disposed on the frame 21. A first spur gear 25 is connected to the cutter shaft of the upper cutter head assembly 22, a second spur gear 26 is connected to the cutter shaft of the lower cutter head assembly 23, and a helical gear 27 is connected to the transmission shaft sleeve 28 of the transmission assembly 24. 25. The second spur gear 26 and helical gear 27 are sequentially connected for transmission. The axis of the cutter shaft of the upper cutter head assembly 22 is parallel to the axis of the cutter shaft of the lower cutter head assembly 23. The helix angle of the helical gear 27, the included angle between the axis of the cutter shaft of the upper cutter head assembly 22 and the axis of the transmission shaft sleeve 28 of the transmission assembly 24 are all equal to the blade swing angle α of the cutting disc shear. The helical gears 27 on the two shear bodies 2 have opposite rotation directions to achieve a symmetrical inclined arrangement of the cutter heads on both sides of the shear bodies 2; the opening degree adjustment device 3 includes a transmission connection The first drive unit 31 and the first transmission unit 32 are connected. The first transmission unit 32 is mounted on the base 1 via a connecting bearing seat 324. The first transmission unit 32 is connected to the frame 21 of the two shear bodies 2. Driven by the first drive unit 31, the first transmission unit 32 can drive the two shear bodies 2 to move synchronously towards or away from the base 1 to control the shearing width of the continuous strip plate to be sheared. The power unit 4 includes a second drive unit 41 and a second transmission unit 42 connected by transmission. The second transmission unit 42 is fixedly mounted on the base 1. The two shear bodies 2 are connected to the second transmission unit 42 by a transmission shaft sleeve 28 on it. A sliding member 29 that is slidably connected to the second transmission unit 42 is connected inside the transmission shaft sleeve 28, so that the shear bodies 2 can move along the second transmission unit 42 under the drive of the first drive unit 31. Under the drive of the second drive unit 41, the second transmission unit 42 can drive the transmission shaft sleeve 28 to rotate, so that the cutter heads on the two shear bodies 2 rotate synchronously to cut the edge of the continuous strip plate to be sheared. In this embodiment, the sliding member 29 connected to the transmission shaft sleeve 28 is a sliding key, and the second transmission unit 42 is provided with a slide rail groove that cooperates with the sliding key, so that the two shear bodies 2 can move towards each other or away from each other along the second transmission unit 42 under the drive of the first drive unit 31, so as to adjust the opening between the cutting surfaces of the cutter discs on the two shear bodies 2 to reduce or increase the opening, thereby controlling the cutting width of the continuous strip plate to be cut.

[0030] Specifically, as shown in Figures 1 to 3, and with reference to Figure 5, the shear body 2 is slidably connected to the base 1 via the frame 21. Along the direction of gravity, the frame 21 is provided with a first assembly hole, a second assembly hole, and a third assembly hole in sequence. The center lines of the first assembly hole and the second assembly hole are parallel, and the center line of the third assembly hole forms an angle with the center line of the first or second assembly hole. This angle is equal to the blade tilt angle α of the cutting disc shear. The upper cutter head assembly 22, the lower cutter head assembly 23, and the transmission assembly 24 are coaxially mounted in the first assembly hole, the second assembly hole, and the third assembly hole respectively through their respective assembled bearings, positioning components, and locking components. The upper cutter head assembly 22 includes an upper cutter shaft assembly and an upper cutter head, and the lower cutter head assembly 23 includes a lower cutter shaft assembly and a lower cutter head. The upper cutter head and the lower cutter head are respectively fixed to the front end of the upper cutter shaft assembly and the lower cutter shaft assembly (the end near the continuous strip plate) by their respective assembled positioning components and locking nuts, so that the shearing operation of the continuous strip plate can be realized by the rotation of the upper cutter head and the lower cutter head. The upper cutter shaft assembly is connected to a first spur gear 25 at its rear end for transmission, and the lower cutter shaft assembly is connected to a second spur gear 26 at its rear end for transmission. The transmission shaft sleeve 28 is connected to a helical gear 27 with a helix angle equal to the cutter head swing angle α at its rear end for transmission. The transmission shaft sleeve 28 is connected to the second transmission unit 42 for transmission, and the helical gear 27 is connected to the transmission shaft sleeve 28 via a key. The first spur gear 25, the second spur gear 26, and the helical gear 27 are sequentially connected for transmission, thereby achieving the power transmission for the rotation of the upper and lower cutter heads. Thus, as shown in Figure 6, when the shear body 2 is coaxially connected to the second transmission unit 42 via the transmission shaft sleeve 28, the axial direction of the upper cutter head assembly 22 and the lower cutter head assembly 23 forms the cutter head swing angle α of the edge-cutting disc shear with respect to the axial direction of the second transmission unit 42.

[0031] This application creates a first and a second assembly hole with parallel centerlines on the frame 21 of the shear body 2, and a third assembly hole with an angle equal to the blade tilt angle α of the cutting disc shear between the centerline and the centerlines of the first or second assembly hole. This allows the shear body 2 to be coaxially connected to the second transmission unit 42 via the transmission shaft sleeve 28. The axial directions of the upper blade assembly 22 and the lower blade assembly 23 then form the blade tilt angle α of the cutting disc shear with respect to the axial direction of the second transmission unit 42. Combined with spatial gear transmission technology, this achieves the power transmission for the rotation of the upper and lower blades. This ensures that the symmetrically arranged shear bodies 2 have the required blade tilt angle α, while the axes of the transmission shaft sleeves 28 on both sides of the shear body 2 coincide. This design achieves coaxial arrangement of the transmission components of the two shear bodies 2 (including the transmission components of the first transmission unit 32 connected to the two shear bodies 2 respectively and the transmission components of the second transmission unit 42 connected to the two shear bodies 2 respectively). This solves the problem in traditional disc shear designs where the symmetrical swing angle α of the blade disc on both sides of the shear body 2 causes the transmission components of the two shear bodies 2 to be out of axis, resulting in vibration during high-speed shearing and seriously affecting the shearing quality. At the same time, the coaxial arrangement of the transmission components of the two shear bodies 2 is beneficial for detecting and ensuring the parallelism between the axis of the first transmission unit 32, the axis of the second transmission unit 42, and the moving path of the shear body 2 relative to the base 1 during assembly, reducing the workload of equipment replacement and maintenance, and improving the interchangeability of the edge-cutting disc shear.

[0032] To ensure the machining accuracy of the first, second, and third assembly holes on the frame 21, as well as the angular accuracy between the cutter shaft assembly and the axis of the second transmission unit 42, a multi-axis precision machining tool is preferred to machine the assembly holes on the frame 21. Their relative positions are shown in Figure 5. The machining process route for each assembly hole is as follows: first, the parallel first and second assembly holes are machined, and then the cutter head is symmetrically oscillated at the center a of the tooth width of the helical gear 27 mounted on the transmission shaft sleeve 28 at the center a of the tooth width, and then the third assembly hole is machined.

[0033] According to one optional embodiment of this application, as shown in Figures 1 and 2, along the power output direction of the second drive unit 41, the two shear bodies 2 are a transmission-side shear body 2 and an operating-side shear body 2, respectively. The helical gear 27 on the transmission-side shear body 2 is a right-hand helical gear 27, and the helical gear 27 on the operating-side shear body 2 is a left-hand helical gear 27. Specifically, the rotation direction of the helical gears 27 on both shear bodies 2 is consistent with the swing angle direction of their corresponding third mounting holes, so that the two shear bodies 2 can move towards or away from each other along the second transmission unit 42 under the drive of the first drive unit 31, thereby adjusting the opening degree between the cutter disc cutting surfaces on the two shear bodies 2.

[0034] According to one optional embodiment of this application, the second drive unit 41 includes a power base 1 and a drive motor 411, a first coupling 412, a first reducer 413, and a second coupling 414, which are mounted on the power base 1 and sequentially connected in transmission. The output end of the second coupling 414 is connected to the input end of the second transmission unit 42. Specifically, as shown in FIG1, the first reducer 413 connects its input shaft to the drive motor 411 through the first coupling 412, and connects its output end to the second transmission unit 42 through the second coupling 414. By setting the power base 1, the output axes of the drive motor 411, the first coupling 412, the first reducer 413, and the second coupling 414, which are sequentially connected on the power base 1, are aligned with the axis of the second transmission unit 42, which facilitates space saving and quick assembly of the second drive unit 41. The second coupling 414 is connected to the input end of the second transmission unit 42 to transmit power to the second transmission unit 42.

[0035] According to one optional embodiment of this application, the second transmission unit 42 includes a transmission coupling 421 and two transmission shafts 422 (i.e., transmission components that connect the second transmission unit 42 to the two shear bodies 2 respectively). The two transmission shafts 422 are coaxially connected through the transmission coupling 421 and mounted on the base 1 through a transmission bearing seat 423. The output end of the second drive unit 41 is connected to the input end of one of the transmission shafts 422, and the two transmission shafts 422 are correspondingly connected to the transmission shaft sleeves 28 on the two shear bodies 2. Specifically, as shown in Figure 1, the two transmission shafts 422 are coaxially arranged and connected by transmission coupling 421. Each transmission shaft 422 is provided with a slide rail groove extending along the axial direction. The transmission shaft 422 achieves sliding connection with the corresponding shear body 2 through the cooperation of the slide rail groove and the sliding key on the transmission shaft sleeve 28. In this system, a transmission shaft 422 connected to the output end of the second drive unit 41 engages with the transmission shaft sleeve 28 of the transmission-side shear body 2 to transmit power. Another transmission shaft 422 engages with the transmission shaft sleeve 28 of the operating-side shear body 2 to transmit power. Under the power output of the drive motor 411, the transmission shaft sleeves 28 of both shear bodies 2 rotate with the transmission shaft 422, sequentially driving the helical gear 27, the second spur gear 26, and the first spur gear 25 connected to it to rotate. This, in turn, drives the upper and lower cutter discs on both shear bodies 2 to rotate synchronously, achieving continuous strip cutting. A suitable clearance is maintained between the transmission shaft 422 and the transmission shaft sleeve 28 to allow the transmission shaft sleeve 28 to smoothly reciprocate a certain distance along the axial direction of the transmission shaft 422.

[0036] According to one optional embodiment of this application, a guide rail is provided on the base 1, and a connecting part 211 that cooperates with the guide rail is formed on the frame 21. A copper sliding plate 212 is provided between the connecting part 211 and the guide rail. Under the drive of the first drive unit 31, the two shear bodies 2 move synchronously towards or away from each other along the guide rail. Specifically, as shown in Figures 1 to 3, there are two guide rails arranged side by side at intervals along the axial direction of the drive shaft 422, which are used to connect the drive-side shear body 2 and the operating-side shear body 2, respectively. Along the movement direction of the continuous strip plate, inverted L-shaped guide pressure plates 11 are symmetrically installed on both sides of the base 1. The opposing surfaces of the two guide pressure plates 11 form a guide surface b. A guide rail with a rail groove structure is formed between the two guide pressure plates 11 and the base 1. The guide rail is used to guide the shear body 2 when adjusting the opening degree and can play a stable positioning role for the shear body 2 during high-speed cutting. The frame 21 of both shear bodies 2 has connecting portions 211 that mate with guide rails. The two shear bodies 2 are slidably connected to the corresponding guide rails of the base 1 via these connecting portions 211, allowing them to move synchronously towards or away from each other along the guide rails relative to the base 1 under the drive of the first drive unit 31, thus adjusting the opening between the cutting surfaces of the blades on both shear bodies 2. To extend the service life of the guide rails and improve the interchangeability of the edge-cutting disc shears, a copper sliding plate 212 is connected to the surface of the connecting portion 211 of the frame 21 that mates with the guide rail. Of course, the copper sliding plate 212 can also be connected to the surface of the guide rail that mates with the connecting portion 211 of the frame 21; this application does not limit this. Similarly, the guide rail is not limited to the groove structure provided in this embodiment.

[0037] To ensure parallelism between the axis of the drive shaft 422 and the reference surface of the copper slide plate 212, the surface of the connecting part 211 for mounting the copper slide plate 212 is machined when the third mounting hole on the frame 21 is machined using a multi-axis precision machining tool. The sliding surface of the guide plate 11 is ground by a surface grinder to obtain high surface accuracy.

[0038] According to an optional embodiment of this application, as shown in FIG1, the first transmission unit 32 includes a connecting assembly 321, a coupling 322, and two ball screws 323 (i.e., transmission components that connect the first transmission unit 32 to the two shear bodies 2 respectively). The two ball screws are coaxially connected through the coupling 322 and mounted on the base 1 through a connecting bearing seat 324. The output end of the first drive unit 31 is connected to the input end of one of the ball screws. Both ball screws are connected to the connecting assembly 321, and the two ball screws are correspondingly connected to the frame 21 of the two shear bodies 2 through the connecting assembly 321. The threads of the two ball screws are opposite, so that the corresponding connecting assembly 321 can move towards or away from the ball screws along their axial direction under the drive of the first drive unit 31, thereby realizing the mutual approach or distance between the two shear bodies 2, and achieving the purpose of adjusting the opening degree between the cutter heads on the two shear bodies 2. In this embodiment, the first drive unit 31 includes an opening degree adjustment motor 311 and a second reducer 312. The ball screw 323 connected to the transmission side shear body 2 is connected to the output shaft of the second reducer 312, and the input shaft of the second reducer 312 is connected to the opening degree adjustment motor 311.

[0039] According to an optional embodiment of this application, the opening adjustment device 3 further includes an absolute encoder 33, used to calculate the distance between the two shear bodies 2 moving towards or away from each other. The absolute encoder 33 is electrically connected to the first drive unit 31. When the distance calculated by the absolute encoder 33 meets the distance requirement between the cutting surfaces of the cutter heads of the two shear bodies 2, the absolute encoder 33 sends a stop signal to the first drive unit 31. Specifically, as shown in Figure 1, the absolute encoder 33 is installed on the ball screw connected to the operating side shear body 2. The absolute encoder 33 is used to memorize the number of rotations of the ball screw. The change in the opening between the cutting surfaces of the cutter heads on both sides of the shear bodies 2 (i.e., the sum of the axial movement distances of the screw nuts 3211 on the two ball screws) is twice the product of the number of rotations of the ball screw and its lead.

[0040] According to one optional embodiment of this application, referring to Figure 7, the connecting assembly 321 includes a lead screw nut 3211, an intermediate sleeve 3212, and a connecting sleeve 3213. The lead screw nut is threadedly connected to the ball screw 323. The intermediate sleeve 3212 is fitted onto the lead screw nut, and the intermediate sleeve 3212 and the connecting sleeve 3213 form a clearance fit. The connecting sleeve 3213 is connected to the frame 21. When it is necessary to adjust the opening degree between the cutter surfaces on the two shear bodies 2, the opening degree adjustment motor 311 drives the two ball screws to rotate synchronously after being reduced by the second reducer 312. The two lead screw nuts 3211 drive the connecting sleeve 3213 through the intermediate sleeve 3212 to drive the two shear bodies 2 to move towards or away from the base 1 along the guide rail. The absolute encoder 33 calculates the adjustment value. When the required opening degree is reached, the absolute encoder 33 sends a stop signal to the opening degree adjustment motor 311, and the opening degree adjustment motor 311 receives the stop signal and stops rotating. The ball screw is fixedly mounted on the base 1 at both ends by bearing seats. The screw nut 3211 and the intermediate sleeve 3212 are fixedly connected by bolts. The intermediate sleeve 3212 and the connection form a clearance fit. The connecting sleeve 3213 and the frame 21 of the shear body 2 are fixedly connected by keys and bolts.

[0041] According to one optional embodiment of this application, referring to Figure 8, the connecting sleeve 3213 is provided with a receiving cavity for accommodating the intermediate sleeve 3212. A first preset gap is left between the intermediate sleeve 3212 and the connecting sleeve 3213 along the direction of gravity. Along the movement direction of the continuous strip to be sheared, the middle portions of both sides of the intermediate sleeve 3212 extend outward to form fins. Along the axial direction of the ball screw 323, a second preset gap is left between the fins and the connecting sleeve 3213. The first preset gap is larger than the second preset gap. Thus, by providing a first preset gap in the direction of gravity and a second preset gap in the axial direction of the ball screw 323 between the intermediate sleeve 3212 and the connecting sleeve 3213, a safety margin is provided to avoid the problem of the ball screw jamming and being damaged when the parallelism between the ball screw axis and the transmission shaft 422 axis is poor, thereby extending the service life of the edge-cutting disc shear.

[0042] According to one optional embodiment of this application, the first preset gap is 10mm to 20mm, and the second preset gap is 0.02mm to 0.05mm. Thus, by setting an appropriate safety margin, the problem of ball screw jamming and damage is avoided when the parallelism between the ball screw axis and the transmission shaft 422 axis is poor. At the same time, excessive free travel during the reversing rotation of the ball screw driven by the opening adjustment motor 311 is also avoided, ensuring that the opening between the cutter surfaces on both sides of the shear body 2 can be quickly adjusted to the correct position.

[0043] It should be noted that since the drive shafts 422 of both shear bodies 2 are coaxially aligned, and the ball screws of both shear bodies 2 are also coaxially aligned, during assembly, it is only necessary to install a dial indicator at the end of one drive shaft 422 or ball screw, check the coaxiality of the other drive shaft 422 or ball screw, and adjust it to the required value as needed to achieve coaxial assembly of the two drive shafts 422 or two ball screws. As for adjusting the parallelism between the drive shaft sleeve 28 and the ball screw, it is only necessary to adjust them to be perpendicular to a common reference to ensure the parallelism between the drive shaft sleeve 28 and the ball screw.

[0044] Based on the above description, the edge-cutting disc shear provided in the basic application embodiment has the following beneficial effects:

[0045] The edge-cutting disc shear provided in this embodiment of the application, by opening a first and a second assembly hole with parallel center lines on the frame 21 of the shear body 2, and a third assembly hole forming an angle equal to the blade tilt angle α of the edge-cutting disc shear between the center line and the center line of the first or second assembly hole, allows the shear body 2 to be coaxially connected to the second transmission unit 42 via the transmission shaft sleeve 28. The axial directions of the upper blade assembly 22 and the lower blade assembly 23 are then aligned with the axial direction of the second transmission unit 42, forming the blade tilt angle α of the edge-cutting disc shear. Combined with spatial gear transmission technology, this achieves the power transmission for the rotation of the upper and lower blades. This ensures that the symmetrically arranged shear bodies 2 have the required blade tilt angle α, while the axes of the transmission shaft sleeves 28 of the two shear bodies 2 coincide, thereby achieving the coaxial arrangement of the transmission components of the two shear bodies 2 (including the transmission components of the first transmission unit 32 connected to the two shear bodies 2 respectively, and the transmission components of the second transmission unit 42 connected to the two shear bodies 2 respectively). This design solves the problem of misalignment of the transmission components on both sides of the shear body 2 due to the symmetrical swing angle α of the cutter head in the traditional disc shear design, which causes vibration during high-speed shearing and seriously affects the shearing quality. At the same time, the coaxial arrangement of the transmission components on both sides of the shear body 2 is beneficial for detecting and ensuring the parallelism between the axis of the first transmission unit 32, the axis of the second transmission unit 42, and the moving path of the shear body 2 relative to the base 1 during assembly, reducing the workload of equipment replacement and maintenance and improving the interchangeability of the edge-cutting disc shear. Furthermore, the accurate control of the opening degree adjustment between the cutter head cutting surfaces on both sides of the shear body 2 is achieved by setting an absolute encoder 33. In addition, the first preset gap reserved in the direction of gravity between the intermediate sleeve 3212 and the connecting sleeve 3213, and the second preset gap reserved in the axial direction of the ball screw 323, provide a safety margin to avoid the problem of ball screw jamming and damage when the parallelism between the ball screw axis and the transmission shaft 422 axis is poor, thus extending the service life of the edge-cutting disc shear.

[0046] The above descriptions are merely a few embodiments of this application. Those skilled in the art can make various modifications or variations to the embodiments of this application based on the content disclosed in the application documents without departing from the spirit and scope of this application.

Claims

1. A cutting disc shear, said cutting disc shear being used to cut a continuous strip plate, wherein, include: Base; Two scissor bodies are symmetrically slidably connected to the base. Each scissor body includes a frame and an upper cutter head assembly, a lower cutter head assembly, and a transmission assembly mounted on the frame. A first spur gear is connected to the cutter shaft of the upper cutter head assembly, a second spur gear is connected to the cutter shaft of the lower cutter head assembly, and a helical gear is connected to the transmission shaft sleeve of the transmission assembly. The first spur gear, the second spur gear, and the helical gear are sequentially connected for transmission. The cutter shaft axis of the upper cutter head assembly is parallel to the cutter shaft axis of the lower cutter head assembly. The helix angle of the helical gear, the included angle between the cutter shaft axis of the upper cutter head assembly and the transmission shaft sleeve axis of the transmission assembly are all equal to the cutter head swing angle of the edge-cutting disc shear. The helical gears on the two scissor bodies rotate in opposite directions. The opening adjustment device includes a first drive unit and a first transmission unit connected by transmission. The first transmission unit is mounted on the base through a connecting bearing seat. The first transmission unit is connected to the frame of the two shears. Under the drive of the first drive unit, the first transmission unit can drive the two shears to move synchronously towards or away from the base to control the shearing width of the continuous strip plate to be sheared. The power unit includes a second drive unit and a second transmission unit connected by transmission. The second transmission unit is fixedly mounted on the base. The two shear bodies are connected to the second transmission unit by transmission shaft sleeves on them. A sliding member that is slidably connected to the second transmission unit is connected inside the transmission shaft sleeve, so that the shear bodies can move along the second transmission unit under the drive of the first drive unit. Under the drive of the second drive unit, the second transmission unit can drive the transmission shaft sleeve to rotate, so that the cutter discs on the two shear bodies rotate synchronously to cut the edge of the continuous strip plate to be cut.

2. The edge-cutting disc shear according to claim 1, wherein, The second transmission unit includes a transmission coupling and two transmission shafts. The two transmission shafts are coaxially connected by the transmission coupling and mounted on the base through a transmission bearing seat. The output end of the second drive unit is connected to the input end of one of the transmission shafts, and the two transmission shafts are correspondingly connected to the transmission shaft sleeves on the two shear bodies.

3. The edge-cutting disc shear according to claim 1 or 2, wherein, The first transmission unit includes a connecting assembly, a coupling, and two ball screws. The two ball screws are coaxially connected by the coupling and mounted on the base through the connecting bearing seat. The output end of the first drive unit is connected to the input end of one of the ball screws. The connecting assembly is connected to both ball screws, and the two ball screws are connected to the frames of the two shear bodies through the connecting assembly.

4. The edge-trimming disc shear according to claim 3, wherein, The connecting assembly includes a lead screw nut, an intermediate sleeve, and a connecting sleeve. The lead screw nut is threadedly connected to the ball screw. The intermediate sleeve is fitted onto the lead screw nut. The intermediate sleeve and the connecting sleeve form a clearance fit. The connecting sleeve is connected to the frame.

5. The edge-cutting disc shear according to claim 4, wherein, The connecting sleeve is provided with a receiving cavity for accommodating the intermediate sleeve. Along the direction of gravity, a first preset gap is left between the intermediate sleeve and the connecting sleeve. Along the movement direction of the continuous strip plate to be sheared, the middle of both sides of the intermediate sleeve extends outward to form fins. Along the axial direction of the ball screw, a second preset gap is left between the fins and the connecting sleeve. The first preset gap is greater than the second preset gap.

6. The edge-trimming disc shear according to claim 5, wherein, The first preset gap is 10mm to 20mm, and the second preset gap is 0.02mm to 0.05mm.

7. The edge-cutting disc shear according to claim 1 or 2, wherein, The opening adjustment device also includes an absolute encoder for calculating the distance between the two shear bodies moving towards or away from each other. The absolute encoder is electrically connected to the first drive unit. When the distance calculated by the absolute encoder meets the distance requirement between the cutting surfaces of the two shear bodies, the absolute encoder sends a stop signal to the first drive unit.

8. The edge-cutting disc shear according to claim 1 or 2, wherein, The base is provided with a guide rail, and the frame is formed with a connecting part that cooperates with the guide rail. A copper sliding plate is provided between the connecting part and the guide rail. Under the drive of the first drive unit, the two shear bodies move synchronously towards or away from each other along the guide rail.

9. The edge-cutting disc shear according to claim 1 or 2, wherein, The second drive unit includes a power base and a drive motor, a first coupling, a first reducer, and a second coupling that are disposed on the power base and sequentially connected in transmission. The output end of the second coupling is connected to the input end of the second transmission unit.

10. The edge-cutting disc shear according to claim 1 or 2, wherein, Along the power output direction of the second drive unit, the two shear bodies are a transmission-side shear body and an operating-side shear body, respectively. The helical gear on the transmission-side shear body is a right-hand helical gear, and the helical gear on the operating-side shear body is a left-hand helical gear.

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