Trimming disc shears

Abstract

The present invention discloses a trimming disc shear, comprising a base, two shear bodies symmetrically slidably connected to the base, an opening adjustment device, and a power device. The shear bodies include a frame, an upper cutter disc assembly, a lower cutter disc assembly, and a transmission assembly disposed on the frame. A first spur gear is connected to the cutter shaft of the upper cutter disc assembly, a second spur gear is connected to the cutter shaft of the lower cutter disc assembly, and a helical gear is connected to the transmission sleeve of the transmission assembly. The first spur gear, the second spur gear, and the helical gear are sequentially connected in a transmission manner. The axis of the cutter shaft of the upper cutter disc assembly is arranged parallel to the axis of the cutter shaft of the lower cutter disc assembly. The helix angle of the helical gears and the angle between the axis of the cutter shaft of the upper cutter disc assembly and the axis of the transmission sleeve of the transmission assembly are all equal to the cutter disc swing angle of the trimming disc shear. The helical gears on the two shear bodies have opposite rotation directions. The present invention can achieve an overlapped arrangement of the axes of the transmission sleeves of the two shear bodies while having the desired cutter disc swing angle.

Description

Technical Field

[0001] The invention relates to the technical field of trimming circular shears, in particular to a trimming circular shears. Background Art

[0002] With the improvement of living standards and the development of technology, the food-grade cold-rolled strip finishing unit - electroplating tinning continuous unit has been rapidly developed. Its product electroplated tinplate is widely used in food packaging, canning and other food industries. Due to the high price of tinplate, high added value of the product and strong market demand, it has been favored by many steel mills.

[0003] Electroplated tinplate is very thin, typically 0.1 to 0.6mm. To achieve large-scale production capacity, the production line must be extremely fast. Currently, the maximum process speed for stable production of electroplating tinplate has reached 450m / min, and the maximum production speed of the inlet and outlet sections has reached 550m / min, placing extremely stringent requirements on the trimming disc shears equipped with the line.

[0004] The main functions of the electroplating tinning unit equipped with a trimming disc shear are: first, to shear the edges of the strip at high speed to obtain extremely high-quality shear sections, remove edge defects, and avoid adding new defects; second, to meet the width sizing accuracy requirements of the finished steel coil.

[0005] In order to meet the shearing process requirements of the circular shear itself, the cutter discs on both sides of the circular 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 change during strip shearing, otherwise serious cutting edge quality defects will occur.

[0006] In recent years, with the optimization of electroplating tinning line production processes, a trimming disc shear has been placed at the line's entry section to remove edge defects from the raw coils and avoid scratching the numerous rubber-coated rollers in the line. Since the maximum production speed at the entry section is 550m / min, and considering that the disc shear's cutting speed must be ahead of the strip speed by a certain amount, the maximum cutting speed of the trimming disc shear has been increased to 560m / min. This means that the disc shear needs to trim even the thinnest strip, as thin as 0.1mm, at an ultra-high speed of 560m / min. This places even more stringent demands on the cutting accuracy and stability of the trimming disc shear's ultra-high-speed operation.

[0007] First, the edge trimming quality requirements for ultra-thin 0.1mm steel sheets include: First, the edge trimming burr height must be no greater than 0.005mm. Since tinplate is primarily used in the food canning industry, where surface trademarks and designs are achieved through multi-color printing, even slightly larger edge trimming burrs can lead to inaccurate steel plate positioning during multi-color printing, resulting in defects such as color ghosting and blurred patterns, leading to product rejection. Therefore, high-end tinplate requires extremely high edge trimming burr control. Furthermore, the circular shears, rotating at 900rpm, must maintain extremely high end face accuracy and stable operation, with no fluctuations in cutting accuracy. Second, the finished coil width accuracy must be 0-0.2mm. Since the circular shears are located at the inlet, failure to meet process requirements for edge trimming accuracy can result in, at best, downgraded finished coils, and, at worst, production line shutdowns and scrap. Therefore, the circular shears must be flexible and easy to adjust the opening, accurately positioned without any obstruction, and the opening guide device must be stable and reliable. Positioning and repeatability must meet the aforementioned requirements. Third, no new shearing defects, such as shear wave patterns, should appear after trimming. This requires that the shear body drive shaft and cutter shaft operate stably and without vibration during high-speed rotation. Within the cutterhead's aperture adjustment range, the swing angle and direction must remain constant. Any such changes will result in quality defects such as shear wave patterns, leading to product degradation or even scrapping.

[0008] The second is the stability requirement during ultra-high-speed shearing at 560m / min. Since the thinnest strip thickness of tinplate is 0.1mm, the disc shear needs to adopt a power shear shearing method driven by an AC variable frequency motor. At this time, the rotation speed of the shear discs on both sides reaches 900rpm, and the stability and synchronization of the high-speed rotation of the shear shafts on both sides are extremely high. If the synchronization and stability are slightly poor, quality defects such as shear edge waves and increased burrs will occur, and the roller surface of the rubber roller will be scratched.

[0009] Therefore, during high-speed edge trimming, the disc shear transmission system and the shear body blade shaft must operate stably and lightly without vibration, without affecting the shearing accuracy of the disc. However, current disc shears have difficulty ensuring the stability of the shear bodies on both sides when the blade shaft rotates at high speed. Summary of the Invention

[0010] At present, the swing angle of the shear disc of the cutting disc is obtained by taking the center of the middle coupling of the shear body transmission shaft on both sides as the swing center and performing overall symmetrical deflection on the shear bodies on both sides. The relationship between the cutter disc trajectory and the equipment axis is as follows: Figure 1As shown, the device for adjusting the aperture between the two cutter heads is a variable frequency motor that decelerates and drives two ball screws (left-hand and right-hand, respectively, connected by a coupling) to rotate simultaneously, thereby driving the two shear bodies on both sides to move synchronously toward or away from each other, thereby adjusting the distance between the two cutter heads (opening). It can be seen that to avoid motion interference when adjusting the aperture, the ball screws on both sides are also set to symmetrically deflect at the same angle with the center of the coupling as the swing center. That is, when adjusting the aperture, the two shear bodies on both sides move synchronously toward or away from each other on the guide rail along the inclined transmission shaft axis.

[0011] Therefore, the existing trimming disc shears have the following problems: First, the transmission shafts of the shear bodies on both sides are not coaxial, which generates vibration during high-speed shearing and seriously affects the shearing quality; second, when the equipment is actually assembled, it is impossible to unify the assembly reference for detection and achieve strict parallelism of the axis of the transmission shaft of the shear bodies on each side, the axis of the ball screw and the guide surface of the guide rail, resulting in changes in the swing angle of the cutter disc when the opening degree is adjusted, and even accidents such as equipment jamming, interference and damage may occur; third, when the parallelism of the axis of the transmission shaft of the shear bodies on each side, the axis of the ball screw and the guide surface of the guide rail is slightly poor, the ball screw is easily jammed and damaged; fourth, since the assembly reference cannot be unified, the workload of re-assembly and adjustment after replacing vulnerable spare parts such as the ball screw is large, resulting in poor interchangeability of vulnerable spare parts.

[0012] The object of the present invention is to provide a trimming disc shear that can solve at least one of the above-mentioned problems of the existing trimming disc shears.

[0013] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0014] The cam is connected to the upper and lower cutting tools by the upper and lower gears, and the lower and lower gears are connected to the gear train of the transmission assembly and the cam are connected to the gear train of the transmission assembly. The driving unit comprises a first transmission unit installed on the base through a connecting bearing seat, and the first transmission unit is connected to the frame of the two shear bodies. Under the drive of the first driving unit, the first transmission unit can drive the two shear bodies to move toward or away from the base synchronously to control the shearing width of the continuous strip plate to be sheared; the power device comprises a second driving unit and a second transmission unit with a transmission connection, the second transmission unit is fixedly installed on the base, and the two shear bodies are connected to the second transmission unit through the transmission sleeve thereon, and a sliding part slidably connected to the second transmission unit is connected in the transmission sleeve, so that the shear body can move along the second transmission unit under the drive of the first driving unit, and under the drive of the second driving unit, the second transmission unit can drive the transmission sleeve to rotate, so that the cutter discs on the two shear bodies rotate synchronously to cut the continuous strip plate to be sheared.

[0015] Preferably, the second transmission unit includes a transmission coupling and two transmission shafts, the two transmission shafts are coaxially connected through the transmission coupling and are installed 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 sleeves on the two scissor bodies.

[0016] Preferably, the first transmission unit includes a connecting assembly, a coupling and two ball screws, the two ball screws are coaxially connected through a coupling and are installed 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 two ball screws are connected to the connecting assembly, and the two ball screws are connected to the frames of the two shear bodies through the connecting assembly thereon.

[0017] Preferably, the connecting assembly includes a screw nut, an intermediate sleeve and a connecting sleeve. The screw nut is threadedly connected to the ball screw, the intermediate sleeve is sleeved on the screw nut, the intermediate sleeve and the connecting sleeve form a clearance fit, and the connecting sleeve is connected to the frame.

[0018] Preferably, the connecting sleeve is provided with an accommodating cavity for accommodating the intermediate sleeve, and a first preset gap is left between the intermediate sleeve and the connecting sleeve along the direction of gravity. Along the movement direction of the continuous strip plate to be sheared, the middle parts of both sides of the intermediate sleeve extend outward to form fin plates, and along the axial direction of the ball screw, a second preset gap is left between the fin plates and the connecting sleeve, and the first preset gap is larger than the second preset gap.

[0019] Preferably, the first preset gap is 10 mm to 20 mm, and the second preset gap is 0.02 mm to 0.05 mm.

[0020] Preferably, the opening adjustment device also includes an absolute value encoder for calculating the distance between the two scissors moving toward or away from each other. The absolute value encoder is electrically connected to the first drive unit. When the distance calculated by the absolute value encoder meets the distance requirement between the shearing surfaces of the two shears, the absolute value encoder sends a stop signal to the first drive unit.

[0021] Preferably, a guide rail is provided on the base, a connecting portion cooperating with the guide rail is formed on the frame, a copper slide is provided between the connecting portion and the guide rail, and under the drive of the first driving unit, the two shear bodies move toward or away from each other synchronously along the guide rail.

[0022] Preferably, the second drive unit includes a power base and a drive motor, a first coupling, a first reducer and a second coupling arranged on the power base and connected in sequence, and the output end of the second coupling is connected to the input end of the second transmission unit.

[0023] Preferably, along the power output direction of the second drive unit, the two scissor bodies are respectively a transmission side scissor body and an operating side scissor body, the helical gear on the transmission side scissor body is a right-handed helical gear, and the helical gear on the operating side scissor body is a left-handed helical gear.

[0024] The characteristics and advantages of the present invention are as follows: the trimming disc shears provided by the present invention are provided with a first assembly hole and a second assembly hole with parallel center lines on the frame of the shear body, and a third assembly hole with an angle formed between the center line and the center line of the first assembly hole or the second assembly hole, which is equal to the cutter disc swing angle of the trimming disc shears. When the shear body is coaxially connected to the second transmission unit through the transmission shaft sleeve, the cutter disc swing angle of the trimming disc shears is formed between the axial direction of the upper cutter disc assembly and the lower cutter disc assembly and the axial direction of the second transmission unit, and the power transmission of the upper and lower cutter discs is realized by cooperating with the spatial gear transmission technology, so that the symmetrically arranged shear bodies on both sides have the required cutter disc swing angle, and the transmission of the shear bodies on both sides is The axes of the shaft sleeves are coincident, thereby realizing the coaxial arrangement of the transmission parts of the shear bodies on both sides (including the transmission parts of the first transmission unit respectively connected to the shear bodies on both sides and the transmission parts of the second transmission unit respectively connected to the shear bodies on both sides), solving the problem that the overall symmetrical swinging of the shear bodies on both sides in the traditional disc shear design causes the swing angle of the cutter disc to be out of sync, thereby causing vibration during high-speed shearing and seriously affecting the shearing quality; at the same time, the coaxial arrangement of the transmission parts of the shear bodies on both sides is conducive to the detection and assurance of the parallelism between the axis of the first transmission unit, the axis of the second transmission unit, and the moving path of the shear body relative to the base during assembly, reducing the workload of equipment replacement and repair, and improving the interchangeability of the cutting disc shears. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the main structure of the trimming circular shear provided in an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the top view of the trimming disc shears provided in an embodiment of the present invention;

[0028] Figure 3 for Figure 1 AA cross-sectional structural diagram;

[0029] Figure 4 A schematic diagram of the connection between the first transmission unit and the base of the trimming circular shears provided in an embodiment of the present invention;

[0030] Figure 5 Schematic diagram of the relationship between the center lines of the mounting holes on the frame of the trimming disc shear provided in an embodiment of the present invention;

[0031] Figure 6A schematic diagram of the centerline relationship of the components of the trimming disc shears provided in an embodiment of the present invention in an assembled state;

[0032] Figure 7 Schematic diagram of the structure of the connecting assembly in the opening adjustment device of the trimming disc shear provided in an embodiment of the present invention;

[0033] Figure 8 The figure is a schematic diagram of the matching connection between the connecting sleeve and the intermediate sleeve in the opening adjustment device of the trimming disc shear provided in an embodiment of the present invention.

[0034] Description of Figure Numbers:

[0035] 1. Base; 11. Guide plate;

[0036] 2. Shear body; 21. Frame; 211. Connecting part; 212. Copper slide; 22. Upper cutterhead assembly; 23. Lower cutterhead assembly; 24. Transmission assembly; 25. First spur gear; 26. Second spur gear; 27. Helical gear; 28. Transmission sleeve; 29. ​​Sliding part;

[0037] 3. Aperture adjustment device; 31. First drive unit; 311. Aperture adjustment motor; 312. Second reducer; 32. First transmission unit; 321. Connecting assembly; 3211. Screw nut; 3212. Intermediate sleeve; 3213. Connecting sleeve; 322. Coupling; 323. Ball screw; 324. Connecting bearing seat; 33. Absolute encoder;

[0038] 4. Power device; 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 seat;

[0039] a. Center of tooth width; b. Guide surface; α. Cutting disc swing angle. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] like Figures 1 to 4 As shown, the present invention provides a cutting disc shear for cutting a continuous strip plate. The movement direction of the continuous strip plate is as follows: Figure 1 、 Figure 2 and Figure 4As shown by the middle arrow, in this embodiment, the continuous strip plate is mainly an ultra-thin strip steel with a thickness range of 0.1mm to 0.5mm. The trimming circular disc shear comprises a base 1, two shear bodies 2 symmetrically slidably connected to the base 1, an opening adjustment device 3 and a power device 4, wherein the shear body 2 comprises a frame 21 and an upper cutter disc assembly 22, a lower cutter disc assembly 23 and a transmission assembly 24 arranged on the frame 21. The cutter shaft of the upper cutter disc assembly 22 is connected to a first straight gear 25, the cutter shaft of the lower cutter disc assembly 23 is connected to a second straight gear 26, the transmission shaft sleeve 28 of the transmission assembly 24 is connected to a bevel gear 27, and the first straight gear 25, the second spur gear 26 and the helical gear 27 are sequentially connected by transmission, the axis of the cutter shaft of the upper cutter disc assembly 22 is arranged parallel to the axis of the cutter shaft of the lower cutter disc assembly 23, the helix angle of the helical gear 27, the angle between the axis of the cutter shaft of the upper cutter disc assembly 22 and the axis of the transmission sleeve 28 of the transmission assembly 24 are equal to the cutter disc swing angle α of the trimming circular shear, the rotation directions of the helical gears 27 on the two shear bodies 2 are opposite to achieve a symmetrical tilted arrangement of the cutter discs on the shear bodies 2 on both sides; the opening adjustment device 3 includes a transmission connection The first drive unit 31 and the first transmission unit 32, the first transmission unit 32 is installed on the base 1 through the connecting bearing seat 324, the first transmission unit 32 is connected to the frame 21 of the two shearing bodies 2, and under the drive of the first drive unit 31, the first transmission unit 32 can drive the two shearing bodies 2 to move synchronously toward or away from the base 1 to control the shearing width of the continuous strip plate to be sheared; the power device 4 includes a second drive unit 41 and a second transmission unit 42 with a transmission connection, the second transmission unit 42 is fixedly installed on the base 1, and the two shearing bodies 2 are transmission-connected to the second transmission unit 42 through the transmission sleeve 28 thereon, and a sliding member 29 is connected to the transmission sleeve 28 for sliding connection with the second transmission unit 42, so that the shearing body 2 can move along the second transmission unit 42 under the drive of the first drive unit 31, and under the drive of the second drive unit 41, the second transmission unit 42 can drive the transmission sleeve 28 to rotate, so that the cutter discs on the two shearing bodies 2 rotate synchronously to cut the continuous strip plate to be sheared. In this embodiment, the sliding member 29 connected to the transmission sleeve 28 is a sliding key, and the second transmission unit 42 is provided with a sliding rail groove that cooperates with the sliding key, so that the shear bodies 2 on both sides can move toward or away from each other along the second transmission unit 42 under the drive of the first drive unit 31 to reduce or increase the opening between the cutter heads on the shear bodies 2 on both sides, thereby controlling the shearing width of the continuous strip plate to be sheared.

[0042] Specifically, such as Figures 1 to 3 As shown, and refer to Figure 5As shown, the shear body 2 is slidably connected to the base 1 via a frame 21. A first assembly hole, a second assembly hole, and a third assembly hole are sequentially provided on the frame 21 along the direction of gravity. The centerlines of the first assembly hole and the second assembly hole are parallel, and the centerline of the third assembly hole forms an angle with the centerline of the first assembly hole or the second assembly hole, which is equal to the cutter head swing angle α of the trimming circular shear. The upper cutter head assembly 22, the lower cutter head assembly 23, and the transmission assembly 24 are coaxially mounted within the first, second, and third assembly holes, respectively, via corresponding bearings, positioning assemblies, and locking assemblies. The upper cutter head assembly 22 includes an upper cutter shaft assembly and an upper cutter head, while the lower cutter head assembly 23 includes a lower cutter shaft assembly and a lower cutter head. The upper and lower cutter heads are respectively secured to the front ends (near one end of the continuous strip) of the upper and lower cutter shaft assemblies by corresponding positioning members and locking nuts, so that the rotation of the upper and lower cutter heads can achieve shearing of the continuous strip. The rear end of the upper cutter shaft assembly is connected to the first spur gear 25 for transmission, the rear end of the lower cutter shaft assembly is connected to the second spur gear 26 for transmission, the rear end of the transmission sleeve 28 is connected to the helical gear 27 with a helical angle equal to the cutter disc swing angle α for transmission, the transmission sleeve 28 is connected to the second transmission unit 42, the helical gear 27 is connected to the transmission sleeve 28 through a key, the first spur gear 25, the second spur gear 26 and the helical gear 27 are connected in sequence to realize the power transmission of the upper and lower cutter discs. Figure 6 As shown, when the shear body 2 is coaxially connected to the second transmission unit 42 through the transmission sleeve 28, the axial direction of the upper cutter disc assembly 22 and the lower cutter disc assembly 23 and the axial direction of the second transmission unit 42 form the cutter disc swing angle α of the trimming circular disc shear.

[0043] The present invention provides a first assembly hole and a second assembly hole with parallel center lines on the frame 21 of the shear body 2, and a third assembly hole with an angle between the center line and the center line of the first assembly hole or the second assembly hole being equal to the cutter disc swing angle α of the trimming disc shears, so that after the shear body 2 is coaxially connected to the second transmission unit 42 through the transmission shaft sleeve 28, the cutter disc swing angle α of the trimming disc shears is formed between the axial direction of the upper cutter disc assembly 22 and the lower cutter disc assembly 23 and the axial direction of the second transmission unit 42, and the spatial gear transmission technology is used to realize the power transmission of the rotation of the upper and lower cutter discs, so that the symmetrically arranged shear bodies 2 on both sides have the required cutter disc swing angle α, and the axes of the transmission shaft sleeves 28 of the shear bodies 2 on both sides are coincident. The coaxial arrangement of the transmission parts of the shear bodies 2 on both sides (including the transmission parts of the first transmission unit 32 connected to the shear bodies 2 on both sides and the transmission parts of the second transmission unit 42 connected to the shear bodies 2 on both sides) solves the problem in the traditional disc shear design that the transmission parts of the shear bodies 2 on both sides are not aligned due to the overall symmetrical swing of the cutter disc at an angle α, thereby causing vibration during high-speed shearing and seriously affecting the shearing quality; at the same time, the coaxial arrangement of the transmission parts of the shear bodies 2 on both sides is conducive to the detection and assurance of 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, thereby reducing the workload of equipment replacement and repair and improving the interchangeability of the trimming disc shears.

[0044] In order to ensure the machining accuracy of the first assembly hole, the second assembly hole and the third assembly hole on the frame 21 and the swing angle accuracy between the tool shaft assembly and the axis direction of the second transmission unit 42, a multi-axis precision machining machine is preferably used to machine the assembly holes on the frame 21. The relative position relationship is as follows: Figure 5 As shown, the processing route of each assembly hole is: first, after processing the parallel first and second assembly holes, the frames 21 of the shear bodies 2 on both sides are symmetrically swung by a cutter head swing angle α at the center a of the tooth width of the helical gear 27 assembled with the transmission sleeve 28, and then the third assembly hole is processed.

[0045] According to a preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, along the power output direction of the second drive unit 41, the two shear bodies 2 are respectively a transmission-side shear body 2 and an operating-side shear body 2. The bevel gear 27 on the transmission-side shear body 2 is a right-handed helical gear 27, and the bevel gear 27 on the operating-side shear body 2 is a left-handed helical gear 27. Specifically, the rotation direction of the bevel gears 27 on both sides of the shear bodies 2 is consistent with the swing angle direction of their corresponding third assembly holes, so that the two shear bodies 2 can move toward 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 heads on the two shear bodies 2.

[0046] According to a preferred embodiment of the present invention, 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 arranged on the power base 1 and are 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, Figure 1 As shown, the first reducer 413 connects its input shaft to the drive motor 411 via a first coupling 412, and connects its output end to the second transmission unit 42 via a second coupling 414. By providing 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 and mounted on the power base 1, are aligned with the axis of the second transmission unit 42, facilitating space conservation and rapid 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.

[0047] According to a preferred embodiment of the present invention, the second transmission unit 42 includes a transmission coupling 421 and two transmission shafts 422 (i.e., transmission members connecting the second transmission unit 42 to the scissor bodies 2 on both sides respectively). The two transmission shafts 422 are coaxially connected through the transmission coupling 421 and are 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. The two transmission shafts 422 are correspondingly connected to the transmission sleeves 28 on the two scissor bodies 2. Specifically, as shown in FIG. Figure 1 As shown, two transmission shafts 422 are coaxially arranged and connected through a transmission coupling 421. Each transmission shaft 422 is provided with a slide rail groove extending along the axial direction. The transmission shaft 422 is slidably connected to the corresponding shear body 2 through the cooperation of the slide rail groove and the sliding key on the transmission shaft sleeve 28. Among them, the transmission shaft 422 connected to the output end of the second drive unit 41 cooperates with the transmission shaft sleeve 28 of the transmission side shear body 2 to transmit power, and the other transmission shaft 422 cooperates 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 the shear bodies 2 on both sides rotate with the transmission shaft 422, and in turn drive the helical gear 27, the second spur gear 26 and the first spur gear 25 connected thereto to rotate, thereby driving the upper and lower cutter discs on the shear bodies 2 on both sides to rotate synchronously, realizing the edge trimming operation of the continuous strip plate. There is a suitable fitting gap between the transmission shaft 422 and the transmission sleeve 28 so that the transmission sleeve 28 can smoothly reciprocate along the axial direction of the transmission shaft 422 for a certain distance.

[0048] According to a preferred embodiment of the present invention, a guide rail is provided on the base 1, a connecting portion 211 is formed on the frame 21 to match the guide rail, and a copper slide 212 is provided between the connecting portion 211 and the guide rail. Driven by the first driving unit 31, the two shear bodies 2 move synchronously toward or away from each other along the guide rail. Specifically, Figures 1 to 3 As shown, there are two guide rails arranged side by side at intervals along the axial direction of the transmission shaft 422, respectively used to connect the transmission side shear body 2 and the operating side shear body 2. Along the movement direction of the continuous strip plate, the base 1 is symmetrically installed with inverted L-shaped guide pressure plates 11. The opposing surfaces of the guide pressure plates 11 on both sides form guide surfaces b. A guide rail with a rail groove structure is formed between the guide pressure plates 11 on both sides and the base 1. The guide rail is used to guide the shear body 2 when adjusting the opening degree, and can play a role in stabilizing the positioning of the shear body 2 during high-speed cutting. A connecting portion 211 that cooperates with the guide rail is formed on the frame 21 of the shear body 2 on both sides. The shear body 2 on both sides is slidably connected to the corresponding guide rail of the base 1 through the connecting portion 211, so that the shear body 2 on both sides can move synchronously toward or away from the base 1 along the guide rail under the drive of the first drive unit 31, thereby achieving the adjustment of the opening degree between the cutter disc cutting surfaces on the shear body 2 on both sides. To extend the service life of the guide rail and improve the interchangeability of the trimming disc shears, a copper slide plate 212 is connected to the surface where the connecting portion 211 of the frame 21 mates with the guide rail. Of course, the copper slide plate 212 can also be connected to the surface where the connecting portion 211 of the guide rail mates with the frame 21, and this application does not limit this. Similarly, the guide rail is not limited to the rail groove structure provided in this embodiment.

[0049] To ensure parallelism between the axis of the transmission shaft 422 and the reference surface of the copper slide 212, a multi-axis precision machining machine was used to machine the third assembly hole on the frame 21. The surface of the connecting portion 211 for mounting the copper slide 212 was machined to form a machined surface. The sliding surface of the guide plate 11 was ground using a surface grinder to achieve high surface accuracy.

[0050] According to a preferred embodiment of the present invention, Figure 1As shown, the first transmission unit 32 includes a connecting assembly 321, a coupling 322, and two ball screws 323 (i.e., the transmission components connecting the first transmission unit 32 to the scissor bodies 2 on both sides). The two ball screws are coaxially connected via the coupling 322 and mounted on the base 1 via 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 a connecting assembly 321, and the two ball screws are correspondingly connected to the frames 21 of the two scissor bodies 2 via the connecting assemblies 321 thereon. The threaded rotation directions of the two ball screws are opposite, so that the corresponding connecting assemblies 321 can move toward or away from each other along the axis of the ball screws under the drive of the first drive unit 31, thereby achieving the purpose of moving the scissor bodies 2 on both sides closer to or farther away from each other, thereby achieving the purpose of adjusting the opening between the cutter heads on the scissor bodies 2 on both sides. In this embodiment, the first drive unit 31 includes an opening 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 adjustment motor 311.

[0051] According to a preferred embodiment of the present invention, the opening adjustment device 3 further includes an absolute value encoder 33 for calculating the distance between the two shear bodies 2 moving toward or away from each other. The absolute value encoder 33 is electrically connected to the first drive unit 31. When the distance calculated by the absolute value encoder 33 meets the distance requirement between the shearing surfaces of the two shear bodies 2, the absolute value encoder 33 sends a stop signal to the first drive unit 31. Specifically, Figure 1 As shown, 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 cutter heads on the shear bodies 2 on both sides (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 screw lead.

[0052] According to a preferred embodiment of the present invention, Figure 7As shown, 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, and the intermediate sleeve 3212 is sleeved on the lead screw nut. The intermediate sleeve 3212 and the connecting sleeve 3213 form a clearance fit, and the connecting sleeve 3213 is connected to the frame 21. When the aperture between the cutter heads on the two scissor bodies 2 needs to be adjusted, the aperture adjustment motor 311 is decelerated by the second reducer 312 and drives the two ball screws to rotate synchronously. The two lead screw nuts 3211 drive the connecting sleeve 3213 through the intermediate sleeve 3212 to drive the scissor bodies 2 on both sides to move toward or away from each other along the guide rail relative to the base 1. The adjustment value is calculated by the absolute encoder 33. When the desired aperture is reached, the absolute encoder 33 sends a stop signal to the aperture adjustment motor 311, and the aperture adjustment motor 311 receives the stop signal and stops. Among them, both ends of the ball screw are fixedly installed on the base 1 through bearing seats, the screw nut 3211 and the intermediate sleeve 3212 are fixedly connected by bolts, a clearance fit is formed between the intermediate sleeve 3212 and the connection, and the connecting sleeve 3213 and the frame 21 of the shear body 2 are fixedly connected by keys and bolts.

[0053] According to a preferred embodiment of the present invention, Figure 8 As shown, the connecting sleeve 3213 is provided with a receiving cavity for accommodating the intermediate sleeve 3212. A first preset gap is provided between the intermediate sleeve 3212 and the connecting sleeve 3213 in the direction of gravity. Along the direction of motion 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 axis of the ball screw 323, a second preset gap is provided between the fins and the connecting sleeve 3213, with the first preset gap being larger than the second preset gap. In this way, 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 axis of the ball screw 323 provide a safety margin, preventing the ball screw from jamming and damaging due to poor parallelism between the ball screw axis and the drive shaft 422, thereby extending the service life of the trimming disc shear.

[0054] According to a preferred embodiment of the present invention, the first preset gap is 10 mm to 20 mm, and the second preset gap is 0.02 mm to 0.05 mm. By setting an appropriate safety margin, the problem of the ball screw being blocked and damaged due to poor parallelism between the ball screw axis and the transmission shaft 422 axis is avoided, while also preventing excessive idle travel during the reversal of the ball screw driven by the aperture adjustment motor 311, thereby ensuring that the aperture between the cutter disc sections on the two sides of the shear body 2 can be quickly adjusted to the desired position.

[0055] It should be noted that since the drive shafts 422 of the two scissor bodies 2 are coaxially arranged, and the ball screws of the two scissor bodies 2 are also coaxially arranged, during assembly, it is only necessary to set up a dial indicator at the end of one of the drive shafts 422 or ball screws, check the coaxiality of the other drive shaft 422 or ball screw, and adjust it to the required value as needed to achieve the coaxial assembly of the two drive shafts 422 or ball screws. As for the parallelism adjustment between the drive sleeve 28 and the ball screw, it is only necessary to adjust the two to be perpendicular to a common reference to ensure parallelism between the drive sleeve 28 and the ball screw.

[0056] Based on the above description, the trimming disc shears provided by the embodiment of the present invention have the following beneficial effects:

[0057] The trimming disc shears provided by the embodiment of the present invention is provided with a first assembly hole and a second assembly hole with parallel center lines on the frame 21 of the shear body 2, and a third assembly hole with an angle formed between the center line and the center line of the first assembly hole or the second assembly hole, which is equal to the cutter disc swing angle α of the trimming disc shears. When the shear body 2 is coaxially connected to the second transmission unit 42 through the transmission shaft sleeve 28, the cutter disc swing angle α of the trimming disc shears is formed between the axial direction of the upper cutter disc assembly 22 and the lower cutter disc assembly 23 and the axial direction of the second transmission unit 42, and the power transmission of the rotation of the upper and lower cutter discs is realized in conjunction with the spatial gear transmission technology, so that the symmetrically arranged shear bodies 2 on both sides have the required cutter disc swing angle α, and the axes of the transmission shaft sleeves 28 of the shear bodies 2 on both sides are coincident, thereby realizing the coaxial arrangement of the transmission parts of the shear bodies 2 on both sides (including the transmission parts respectively connected to the shear bodies 2 on both sides by the first transmission unit 32 and the transmission parts respectively connected to the shear bodies 2 on both sides by the second transmission unit 42), solving the problem of the coaxial arrangement of the transmission parts of the shear bodies 2 on both sides. The invention solves the problem that the symmetrical swinging angle α of the cutter discs 2 on both sides of the traditional circular shear design causes the transmission parts of the shear bodies 2 on both sides to be out of axial alignment, thereby causing vibration during high-speed shearing and seriously affecting the shearing quality; at the same time, the coaxial arrangement of the transmission parts of the shear bodies 2 on both sides is conducive to the detection and guarantee of 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 repair, and improving the interchangeability of the edge trimming circular shear; and by setting an absolute encoder 33, accurate control of the opening adjustment between the cutter disc sections on the shear bodies 2 on both sides is achieved; in addition, a first preset gap is reserved between the intermediate sleeve 3212 and the connecting sleeve 3213 in the direction of gravity, and a second preset gap is reserved in the axial direction of the ball screw 323 to leave a safety margin, thereby avoiding the problem of the ball screw being stuck and 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 trimming circular shear.

[0058] The above descriptions are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A trimming disc shear, used for cutting continuous strip plates, characterized in that: include: base; The two shearing bodies symmetrically and slidingly connected to the base, the shearing body comprising a frame and an upper cutter disc assembly, a lower cutter disc assembly, and a transmission assembly arranged on the frame, the cutter shaft of the upper cutter disc assembly being connected to a first spur gear, the cutter shaft of the lower cutter disc assembly being connected to a second spur gear, the transmission sleeve of the transmission assembly being connected to a helical gear, the first spur gear, the second spur gear and the helical gear being transmission-connected in sequence, the cutter shaft axis of the upper cutter disc assembly being arranged parallel to the cutter shaft axis of the lower cutter disc assembly, the helix angle of the helical gear and the angle between the cutter shaft axis of the upper cutter disc assembly and the transmission sleeve axis of the transmission assembly being equal to the cutter disc swing angle of the trimming circular shears, and the rotation directions of the helical gears on the two shearing bodies are opposite; The opening degree adjustment device includes a first drive unit and a first transmission unit in a transmission connection, the first transmission unit being mounted on the base via a connecting bearing seat, the first transmission unit being connected to the frames of the two shear bodies, and driven by the first drive unit, the first transmission unit being able to drive the two shear bodies to synchronously move toward or away from each other relative to the base to control the shearing width of the continuous strip plate to be sheared; The power device includes a second drive unit and a second transmission unit with a transmission connection. The second transmission unit is fixedly mounted on the base. The two shear bodies are transmission-connected to the second transmission unit through the transmission sleeve thereon. A sliding member is connected to the transmission sleeve and is slidingly connected to the second transmission unit, 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 sleeve to rotate, so that the cutter discs on the two shear bodies rotate synchronously to cut the continuous strip plate to be sheared.

2. The trimming disc shear according to claim 1, characterized in that: The second transmission unit includes a transmission coupling and two transmission shafts. The two transmission shafts are coaxially connected through the transmission coupling and are installed 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 sleeves on the two shear bodies.

3. The trimming disc shear according to claim 1 or 2, characterized in that: The first transmission unit includes a connecting assembly, a coupling and two ball screws. The two ball screws are coaxially connected through a coupling and are installed 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 two ball screws are connected to the connecting assembly, and the two ball screws are connected to the frames of the two shear bodies through the connecting assembly thereon.

4. The trimming disc shear according to claim 3, characterized in that: The connecting assembly includes a screw nut, an intermediate sleeve and a connecting sleeve. The screw nut is threadedly connected to the ball screw, the intermediate sleeve is sleeved on the screw nut, the intermediate sleeve and the connecting sleeve form a clearance fit, and the connecting sleeve is connected to the frame.

5. The trimming disc shear according to claim 4, characterized in that: The connecting sleeve is provided with an accommodating 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 parts of both sides of the intermediate sleeve extend outward to form fin plates. Along the axial direction of the ball screw, a second preset gap is left between the fin plates and the connecting sleeve. The first preset gap is larger than the second preset gap.

6. The trimming disc shears according to claim 5, characterized in that: The first preset gap is 10 mm to 20 mm, and the second preset gap is 0.02 mm to 0.05 mm.

7. The trimming disc shear according to claim 1, characterized in that: The opening adjustment device also includes an absolute value encoder for calculating the distance between the two scissors moving toward or away from each other. The absolute value encoder is electrically connected to the first drive unit. When the distance calculated by the absolute value encoder meets the distance requirement between the shearing surfaces of the two shears, the absolute value encoder sends a stop signal to the first drive unit.

8. The trimming disc shear according to claim 1, characterized in that: A guide rail is provided on the base, a connecting portion that cooperates with the guide rail is formed on the frame, and a copper slide is provided between the connecting portion and the guide rail. Under the drive of the first driving unit, the two shear bodies move toward or away from each other synchronously along the guide rail.

9. The trimming disc shears according to claim 1, characterized in that: The second drive unit includes a power base and a drive motor, a first coupling, a first reducer and a second coupling arranged on the power base and connected in sequence. The output end of the second coupling is connected to the input end of the second transmission unit.

10. The trimming disc shear according to claim 1, characterized in that: Along the power output direction of the second drive unit, the two shear bodies are respectively a transmission side shear body and an operating side shear body, the helical gear on the transmission side shear body is a right-handed helical gear, and the helical gear on the operating side shear body is a left-handed helical gear.

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