Magnet cutting device

Abstract

The present application relates to a kind of magnet cutting device, including workbench, round saw blade of cutting mouth, and the magnet feeding slide with stop initial interval, middle section travel interval and sawing travel interval;Two sets of cleaning components are symmetrically provided below the workbench, each component includes the driving plate connected to the slide, electromagnetic suction accessory, travel trigger switch and elastic reset member;When the slide is in the middle section travel interval, the driving plate is down through the mating surface Trigger lever to make electromagnetic suction accessory power-on;The trigger position of the two cleaning components is staggered along the feeding direction, so that one side electromagnetic suction accessory is powered on to attract scrap, and the other side is released. The timing of cutting, standby and cleaning conditions is staggered to avoid the collision of double-sided magnetic field and continuous dry grinding annealing defects, avoid the round saw blade from inducing drift swing and exploding knife due to accumulated scrap, and improve the precision of magnet cutting.

Description

Technical Field

[0001] This invention relates to the field of magnet processing and manufacturing, and specifically to a magnet cutting device. Background Technology

[0002] Sintered NdFeB is a typical hard and brittle intermetallic compound with extremely low fracture toughness and significant tensile and compressive anisotropy. Its processing requires high-precision sawing equipment to cut the blanks into thin slices or magnetic tiles of specific dimensions. Existing sawing equipment typically uses a bottom-mounted power spindle to drive an ultra-thin diamond circular saw blade at high speed, with a feed clamping slide mounted on the worktable. This slide pushes the long, strip-shaped magnetic blank along a set trajectory towards the cutting edge to achieve feed cutting.

[0003] The magnet blank matrix is ​​rich in high concentrations of iron. Under the high-frequency micro-shearing and extrusion of high-speed diamond abrasive grains and the intense interfacial friction, a large amount of submicron to micron-sized fine powder will inevitably be generated instantaneously in the cutting pole area. Under the action of tribomagnetization and cutting temperature rise, the above-mentioned metal powder forms a spontaneous magnetic dipole attraction tendency, agglomerates in the kerf, and then adheres to the sidewalls of the steel matrix on both sides of the rotating thin saw blade, forming a sticky ferromagnetic cake that is difficult to spontaneously detach.

[0004] Conventional methods of externally spraying cutting fluid for flushing are insufficient because they cannot overcome the self-contained rotating air curtain barrier formed on the outer periphery of the saw blade at high speeds of thousands of revolutions per minute. This results in a significant decrease in the dynamic pressure of the flushing, making it impossible to remove the magnetic sludge that has hardened inside the deep and narrow cut. On the other hand, if only a contact scraper or abrasive brush is used to passively scrape the saw blade from the side, the scraper will maintain continuous frictional contact with the thin saw blade during non-cutting idle strokes and standby periods. This will generate significant parasitic frictional torque and continuous frictional heat accumulation, causing wear and damage to the scraper itself. Furthermore, it will cause the saw blade to undergo thermal annealing softening and warping deformation under thermal stress. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetic cutting device to solve the technical problems of existing magnetic cutting devices, such as the inability to effectively clean the hardened magnetic sludge on the surface of the saw blade by rinsing and the easy damage caused by contact scraping.

[0006] The technical solution of the present invention is as follows: A magnetic cutting device includes a worktable having a cutting kerf extending in the feed direction. A circular saw blade is rotatably mounted below the worktable and protrudes upwards from the cutting edge; Also includes: The magnetic feed slide is mounted on the worktable to drive the magnet to move back and forth in the feed direction. The reciprocating stroke of the magnetic feed slide includes the initial stop interval, the sawing stroke interval, and the middle stroke interval between the two. Two cleaning components are arranged below the workbench and symmetrically on both sides of the circular saw blade. Each cleaning component includes: The drive plate, connected to the magnetic feed slide, has a mating surface extending along the feed direction; An electromagnetic adsorption component is arranged on the corresponding side of the circular saw blade and has an adsorption surface facing the side of the circular saw blade. The travel trigger switch is electrically connected to the power supply circuit of the electromagnetic adsorption component, and its trigger rod is in transmission engagement with the mating surface. The elastic reset element is used to apply a force to the trigger rod that moves in the opposite direction to the travel trigger switch, so as to disconnect the power supply circuit; When the magnetic feed slide is in the middle stroke range, the drive plate presses down the corresponding trigger rod through the mating surface to close the stroke trigger switch, connect the power supply circuit, and energize the electromagnetic adsorption component. The drive plates and trigger positions of the trigger rods of the two cleaning components are staggered along the feed direction so that when one electromagnetic adsorption component is energized, the other electromagnetic adsorption component is de-energized.

[0007] Furthermore, each of the drive plates has a partially pressing convex section on its mating surface for pressing down the trigger rod. The front and rear sides of the partially pressing convex section are respectively straight sections that avoid the trigger rod. In the two cleaning components, the two partially pressing convex sections are staggered along the feed direction so that the two drive plates press down the corresponding trigger rods in sequence.

[0008] Furthermore, the two ends of the locally pressing convex section are formed into a smoothly transitioning inlet slope and an outlet slope; within the middle stroke range, the orthographic projection contours of the two locally pressing convex sections in the feed direction do not overlap.

[0009] Furthermore, a non-magnetic limiting block protruding from the adsorption surface of the electromagnetic adsorption component facing the circular saw blade is fixed thereon; the limiting block and the side wall of the circular saw blade have an anti-air suction gap.

[0010] Furthermore, it also includes a centering auxiliary cleaning mechanism located below the workbench, which includes: Two swing arms are symmetrically arranged on both sides of the circular saw blade. The middle part of each swing arm is hinged to the bottom of the worktable, and the rear section of the swing arm has a swing engagement part. Auxiliary brush, rotatably mounted on the front end of the swing arm; The transmission component is mounted on the worktable in the vertical direction; An auxiliary elastic element is connected between the two swing arms to apply a force to the two swing arms to drive the two auxiliary brushes to move in opposite directions. Each of the drive plates is provided with a pushing part extending along the feed direction. The pushing part cooperates with the transmission component to drive the two auxiliary brushes to move closer to each other and bring the auxiliary brushes close to or against the side wall of the circular saw blade, so as to mechanically disturb and peel off the debris adhering to the surface of the circular saw blade before the electromagnetic adsorption component is energized and adsorbed.

[0011] Furthermore, the drive plate includes a vertical plate segment, and a transversely protruding horizontal plate segment is provided on the side wall of the vertical plate segment. The bottom surface of the vertical plate segment constitutes the mating surface, and the bottom surface of the horizontal plate segment constitutes the pushing part.

[0012] Furthermore, a fixed sleeve is provided below the workbench, and the transmission component is a mating rod that is movably inserted into the fixed sleeve. The top of the mating rod abuts against the pushing part, and a lifting spring that drives the mating rod to move upward is connected between the mating rod and the fixed sleeve. The swing mating part is an inclined guide groove provided on the inner side of the rear section of the swing arm, and the mating rod moves downward to open the swing arm through the inclined mating.

[0013] Furthermore, the travel trigger switch includes a hollow guide sleeve fixed below the workbench, the trigger rod is guided through the hollow guide sleeve, and the elastic reset element is a reset compression spring sleeved on the outer periphery of the trigger rod; the inner end of the trigger rod extends into the hollow guide sleeve and is provided with a moving contact, and the bottom of the hollow guide sleeve is provided with a stationary contact electrically connected to the power supply circuit.

[0014] Furthermore, the worktable has through slots parallel to the feed direction on both sides of the cutting edge, and the two drive plates pass downward through the corresponding through slots and extend downward to below the lower bottom beam of the worktable.

[0015] Furthermore, the magnet feed slide is provided with two-way clamping cylinders arranged laterally opposite each other, and the piston ends of the two two-way clamping cylinders are respectively connected to wear-resistant clamping plates for clamping the long strip of magnet blank from both sides.

[0016] The beneficial effects of this application are as follows: By dividing the reciprocating stroke of the magnet feed slide into an initial stop interval, a sawing stroke interval, and a middle stroke interval, and utilizing the transmission between the drive plate mating surface and the elastically reset stroke trigger switch, the electromagnetic adsorption component is energized and attracts chips only when the slide reciprocates to the middle non-cutting stroke, while it is spontaneously de-energized and demagnetized during the initial stop and actual sawing process. This overcomes the defect of traditional normally open or normally closed cleaning mechanisms where continuous friction throughout the entire stroke causes the thin saw blade to soften due to heat annealing, and eliminates the hidden danger of external parasitic magnetic fields generating normal adsorption bending stress on the ultra-thin circular saw blade during sawing operations.

[0017] Furthermore, by staggering the trigger positions of the cleaning components on both sides along the feed direction, an electromagnetic working sequence is achieved where one side is energized for strong attraction while the other side is de-energized for avoidance. This avoids the collision of magnetic lines of force and magnetic flux saturation attenuation generated inside the ultra-thin saw blade when both magnetic poles are simultaneously energized, thereby improving the transient magnetic field gradient and mud-cleaning efficiency of the electromagnetic adsorption surface on one side. Alternating adsorption avoids the high-frequency axial forced vibration of the saw blade induced by the transient imbalance of magnetic pull on both sides, improving the surface parallelism tolerance and processing yield of high-hardness and brittle magnetic slices. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a specific embodiment of the magnet cutting device of the present invention; Figure 2 for Figure 1 A cross-sectional view of the location of the electromagnetic adsorption component; Figure 3 for Figure 1 Top view of the swing arm; Figure 4 for Figure 1 Cross-sectional view of a medium-stroke trigger switch; Figure 5 for Figure 1 Schematic diagram of the drive board structure; Figure 6 for Figure 1 A diagram showing the status of a cleaning facility not in operation. Figure 7 for Figure 1 Diagram of the operational status of a Chinese cleaning agency; In the diagram: 1-Worktable; 11-Cutting edge; 12-Through groove; 2- Circular saw blade; 3-Magnetic feed slide; 31-Two-way clamping cylinder; 32-Wear-resistant clamping plate; 4-Drive plate; 41-Vertical plate segment; 411-Matching surface; 412-Partially pressed convex surface segment; 413-Straight segment; 42-Horizontal plate segment; 421-Pushing part; 5-Electromagnetic adsorption component; 51-Adsorption surface; 52-Limiting spacer; 6-Limit-Trigger Switch; 61-Hollow Guide Sleeve; 62-Trigger Rod; 63-Reset Compression Spring; 64-Moving Contact; 65-Stationary Contact; 7-Swing arm; 71-Beveled guide groove; 72-Auxiliary brush; 73-Auxiliary elastic compression spring; 8-Fixing sleeve; 81-Matching rod; 82-Lifting spring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0023] A specific embodiment of the magnetic cutting device of the present invention: as follows Figures 1 to 7 As shown, it includes a mounting frame, a horizontal worktable 1 located on top of the frame, a sawing mechanism located below the worktable 1, a workpiece feeding and clamping mechanism slidably mounted on the upper part of the worktable 1, and a cleaning mechanism symmetrically arranged on both sides of the lower part of the circular saw blade 2.

[0024] The worktable 1 has a narrow, elongated longitudinal cutting slit 11 along the feed direction for the circular saw blade 2 to rotate through. The width of the cutting slit 11 is precisely matched to the thickness of the circular saw blade 2. The circular saw blade 2 is mounted on the worktable 1 via a rotating shaft and a lower bearing seat, and is driven to rotate at high speed by a spindle motor through a transmission belt or coupling, causing the diamond outer circular cutting edge of the circular saw blade 2 to partially pass upward through the cutting slit 11 and protrude above the worktable 1. On the worktable 1, near the cutting slit 11 on both sides, there are parallel rectangular through slots 12 extending along the feed direction. These two through slots 12 penetrate downward through the worktable 1 and extend to the space below the bottom beam of the worktable 1.

[0025] On the upper surface of the worktable 1, the magnetic feed slide 3 is slidably mounted in the rectangular through groove 12 through the slider. The upper end face of the magnetic feed slide 3 is provided with two-way clamping cylinders 31 arranged laterally opposite to each other. The two sets of cylinders are arranged in a coaxial and opposite layout, and the output ends are respectively connected to a wear-resistant clamping plate 32.

[0026] The magnetic feed slide 3 is divided into three working condition intervals along the entire forward and return stroke in the feed direction: the initial stop interval at the rear limit position, the sawing stroke interval at the workpiece formally entering the cutting edge 11, and the middle stroke interval between the initial stop interval and the sawing stroke interval.

[0027] At the bottom of the magnetic feed slide 3, two irregularly shaped drive plates 4 are fixed and move synchronously with the slide. The two drive plates 4 extend downward from the two through slots 12 on the worktable 1 and are vertically suspended below the worktable 1. Each drive plate 4 includes a vertical plate segment 41 that hangs straight down in the vertical direction and a horizontal plate segment 42 that cantilevered horizontally outward from the side wall of the vertical plate segment 41. The bottom edge of the vertical plate segment 41 is integrally formed into a mating surface 411 that extends continuously in the feed direction, and the bottom surface of the horizontal plate segment 42 serves as an auxiliary pushing part 421. Both are responsible for outputting mechanical displacement control commands with timing difference to different actuators in the space below.

[0028] The mating surface 411 of the bottom surface of the vertical plate segment 41 is smoothly connected by a partially pressing convex section 412 located in the middle and straight avoidance sections located on the front and rear sides of the partially pressing convex section 412. The front and rear edges of the partially pressing convex section 412 are processed with smooth transition lead-in and lead-out bevels to eliminate rigid impact and vibration during movement contact. The two drive plates 4 symmetrically arranged on both sides of the circular saw blade 2 have partially pressing convex sections 412 at the bottom of their vertical plate segments 41 arranged alternately in the feed direction. The orthographic projection contours of the two partially pressing convex sections 412 in the feed direction do not overlap and present a staggered phase difference.

[0029] Two independent cleaning components are symmetrically installed below the workbench 1 and on the outer side of the non-cutting rotating arc segment corresponding to both sides of the axial direction of the circular saw blade 2.

[0030] Each cleaning component includes a travel trigger switch 6 fixed below the workbench 1, a trigger rod 62 movably inserted into the travel trigger switch 6, an elastic reset component located inside the travel trigger switch 6, and an electromagnetic adsorption component 5 arranged toward the side wall of the circular saw blade 2.

[0031] The travel trigger switch 6 includes a hollow guide sleeve 61. The lower end of the trigger rod 62 is coaxially guided and slidably disposed inside the hollow guide sleeve 61. The upper end of the trigger rod 62 extends out of the hollow guide sleeve 61 and is attached upward to the mating surface 411 of the vertical plate section 41 of the corresponding drive plate 4. A reset compression spring 63, serving as an elastic reset element, is sleeved inside the hollow guide sleeve 61. This reset compression spring 63 constantly pushes the trigger rod 62 upward, causing the trigger rod 62 to have a reset tendency to move away from the center of the travel trigger switch 6. A moving contact 64 is fixedly provided at the lower end of the trigger rod 62 extending into the hollow guide sleeve 61, while a stationary contact 65 is correspondingly provided at the bottom of the hollow guide sleeve 61.

[0032] When the feed slide is in the initial stop range or advances to the sawing stroke range of the circular saw blade 2 cutting edge 11, the straight section 413 on the vertical section 41 of the two drive plates 4 is directly facing the trigger rod 62 roller below. The trigger rod 62 is in the highest lifting position under the upward elastic force of the reset compression spring 63. At this time, the moving contact 64 disengages from the stationary contact 65, and the power supply circuit is disconnected.

[0033] When the magnet feed slide 3 is in the middle stroke range, the local pressing convex section 412 on the drive plate 4 rolls over the trigger rod 62 roller as the slide moves. The pressing convex section overcomes the resistance of the reset compression spring 63 and presses the trigger rod 62 vertically downward into the hollow guide sleeve 61, driving the moving contact 64 to tightly engage with the stationary contact 65 and conduct the corresponding power supply circuit.

[0034] Since the local pressing convex sections 412 on the two drive plates 4 are spatially staggered and their projections do not overlap, during the entire time window of the slide table passing through the middle section, there will inevitably be a mutually exclusive timing sequence in which the left drive plate 4 first presses the left switch to energize the left electromagnet, and then the right drive plate 4 presses the right switch to energize the right electromagnet after the left switch is de-energized. This results in the other electromagnetic adsorption component 5 being in a de-energized state when one of the electromagnetic adsorption components 5 is energized to attract chips.

[0035] The electromagnetic adsorption component 5 in each cleaning component is installed next to the corresponding side wall of the circular saw blade 2. It includes an insulating sleeve, an iron core made of stacked high permeability silicon steel sheets, and an excitation coil wound around the outside of the iron core. Its end is formed as an adsorption surface 51 with a flat surface that is parallel to the side of the rotating steel substrate of the circular saw blade 2.

[0036] On the adsorption surface 51 of the electromagnetic adsorption component 5 facing the circular saw blade 2, a limiting block 52 protruding from the outer contour of the adsorption surface 51 is fixedly embedded with screws. The limiting block 52 is made of high-hardness, wear-resistant, and non-magnetic zirconia engineering ceramic material or tin-phosphor bronze alloy. The protrusion height of the outer end face of the limiting block 52 defines an anti-air suction gap between the adsorption surface 51 and the side wall of the high-speed rotating circular saw blade 2.

[0037] Below the workbench 1, there is a centering auxiliary cleaning mechanism that works in conjunction with the horizontal section 42 of the drive plate 4. This mechanism is located in front of the circular saw blade 2 entering the cutting opening 11. The centering auxiliary cleaning mechanism includes two swing arms 7 symmetrically arranged on both sides of the circular saw blade 2 in the thickness direction. The two swing arms 7 are hinged to the bottom of the workbench 1 by vertical pins in their longitudinal middle sections. The front ends of the two swing arms 7 are respectively equipped with auxiliary brushes 72, which are made of dense conductive bronze wire or antistatic carbon fiber bundles, with the free ends of the brushes extending toward the side wall of the circular saw blade 2. On the inner side of the rear section of each swing arm 7, there are inclined guide grooves 71 that gradually slope inward from top to bottom. These inclined guide grooves 71 constitute the swing engagement part. An auxiliary elastic compression spring 73 that provides outward pushing force is connected across the front section of the two swing arms 7. The initial tension of the auxiliary elastic compression spring 73 drives the front ends of the two swing arms 7 to separate from each other and causes the two auxiliary brushes 72 to detach from the circular saw blade 2 base.

[0038] Directly above the inclined guide groove 71 of the rear section of the swing arm 7, below the worktable 1, there is a vertical fixed sleeve 8. A mating rod 81, serving as a transmission component, is axially slidably mounted inside the fixed sleeve 8. The top end of the mating rod 81 extends out of the fixed sleeve 8 and abuts upward against the pushing part 421 on the bottom surface of the corresponding side of the horizontal plate section 42. A lifting spring 82 is fitted around the outer periphery of the mating rod 81, located between its outer edge boss and the fixed sleeve 8. The lifting spring 82 applies a continuous upward return force to the mating rod 81. The bottom end of the mating rod 81 is formed into a wedge-shaped guide end, movably inserted within the inclined guide groove 71.

[0039] When the drive plate 4 moves forward with the slide table and the convex pressing surface of its horizontal plate section 42 presses against the top of the mating rod 81, the mating rods 81 on both sides are forcibly pressed downward. The wedge-shaped ends at the bottom slide downward along the two inclined guide grooves 71. Through the inclined wedge tightening effect, the rear sections of the two swing arms 7 are forcibly opened to both sides, so that the front ends of the two swing arms 7 overcome the resistance of the auxiliary elastic compression spring 73 and move inward to center. This causes the two auxiliary brushes 72 to approach or abut against the side wall of the circular saw blade 2. Before the electromagnetic adsorption component 5 is energized, the dense ferromagnetic mud cake that has hardened in the diamond chip groove is loosened and brushed away. When the slide table leaves this area, the lifting spring 82 lifts the mating rod 81, and the auxiliary elastic compression spring 73 opens the two swing arms 7. The brushes separate from the circular saw blade 2 and avoid it.

[0040] First, the horizontal plate section 42 is used to press the swing arm 7 to drive the auxiliary brush 72 to mechanically disturb it. The elastic bristles break down the mud cake, turning it from a dense solid mud cake into a fluid suspended particle. Then, the longitudinally staggered drive plate 4 mating surface 411 is used to precisely control the electromagnets on both sides to conduct in opposite phases, capturing the suspended magnetic micropowder picked up by the brush on the electromagnetic adsorption surface 51. In the non-middle section where the electromagnets are de-energized, the debris that has lost its electromagnetic binding spontaneously falls off under the scouring of gravity and the surrounding splashing cutting fluid and is discharged into the waste collection hopper below.

[0041] In actual operation, the entire rectangular neodymium iron boron magnet blank, without glue or polishing, is first placed flat on the feed slide plate. The bidirectional clamping cylinder 31 is activated, and the wear-resistant clamping plates 32 on both sides extend to lock the magnet blank in absolute center. Then, the spindle motor is started, and the circular saw blade 2 rotates. Since the magnet feed slide 3 is in the initial stop range at the far right, the straight section 413 below the two drive plates 4 is directly opposite the trigger rod 62, the drive rod is in the lifting position, the electromagnetic circuit is completely disconnected, and the electromagnetic pole head and the swing arm brush maintain a safe distance from the circular saw blade 2 under the action of the spring. The equipment is in a state of absolute zero additional friction and zero power consumption during standby and workpiece clamping stages.

[0042] Subsequently, the machine tool starts the propulsion command, and the magnet blank slides smoothly to the left cutting edge 11 at a uniform speed. When the slide table travels to the middle stroke range, the front end of the workpiece has not yet contacted the circular saw blade 2. At this time, the pushing part 421 of the horizontal section 42 of the drive plate 4 first presses down the vertical cooperating rod 81, driving the scissor swing arm to close inward. The auxiliary brush 72 is attached to both sides of the saw blade to first sweep away any old chips that may remain.

[0043] Next, the partially downward-pressing convex section 412 at the bottom of the first drive plate 4 passes the first trigger rod 62 roller, pressing the left trigger rod 62 vertically downward. The first limit switch contact closes, and the left electromagnetic adsorption component 5 is energized, generating a high-strength magnetic field. This forcefully attracts the attached magnetic debris and the magnetic debris raised by the brush on the left side to the adsorption surface 51. During this period, the right trigger rod 62 remains in the flat section 413 and is de-energized. The slide continues to move forward, and the convex section of the first drive plate 4 passes the left roller, triggering the left limit switch. 6. Under the action of the reset compression spring 63, the power is deactivated by springing upward, and the magnetic field on the left side instantly returns to zero, and the slag is unloaded from the left adsorption surface 51. Immediately afterwards, the local downward pressing convex section 412 at the bottom of the second drive plate 4 just moves to the roller of the right trigger rod 62, and forces the right switch contact to close with the same mechanical action. The right electromagnetic adsorption component 5 is energized and magnetized, and the ferromagnetic debris on the right blade face is adsorbed and removed separately. When the convex section of the second drive plate 4 leaves the right roller, the right circuit is de-energized and demagnetized, realizing the alternating pulse cleaning on both sides.

[0044] As the slide table advances further, the magnetic feed slide table 3 passes the middle travel range and officially enters the sawing travel range. At this time, the straight section 413 behind the two drive plates 4 re-enters the contact area with the roller of the trigger rod 62, and the pushing part 421 also disengages from the engaging rod 81. Under the dual restoring force of the lifting spring 82 and the return spring, the auxiliary brush 72 bounces outward to avoid the impact, and the electromagnets on both sides are completely de-energized and demagnetized. The circular saw blade 2 is completely free from any interference from external grippers, brushes, and parasitic electromagnetic fields. The magnetic strip, which is stably clamped, smoothly cuts into the high-speed rotating circular saw blade 2, whose substrate on both sides has been thoroughly cleaned and polished, to perform efficient cold cutting operations.

[0045] After the cutting is completed, the feed slide, carrying the magnetic residue, moves rapidly backward along the linear guide. As it moves backward through the middle travel section, the same mechanical structure reverses and performs another alternating mud-cleaning cycle. Finally, it returns to the initial stop position and stops, completing a single sawing cycle.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A magnetic cutting device, comprising a worktable having a cutting edge extending along the feed direction; A circular saw blade is rotatably mounted below the worktable and protrudes upwards from the cutting edge; Its features are, Also includes: The magnetic feed slide is mounted on the worktable to drive the magnet to move back and forth in the feed direction. The reciprocating stroke of the magnetic feed slide includes the initial stop interval, the sawing stroke interval, and the middle stroke interval between the two. Two cleaning components are arranged below the workbench and symmetrically on both sides of the circular saw blade. Each cleaning component includes: The drive plate, connected to the magnetic feed slide, has a mating surface extending along the feed direction; An electromagnetic adsorption component is arranged on the corresponding side of the circular saw blade and has an adsorption surface facing the side of the circular saw blade. The travel trigger switch is electrically connected to the power supply circuit of the electromagnetic adsorption component, and its trigger rod is in transmission engagement with the mating surface. The elastic reset element is used to apply a force to the trigger rod that moves in the opposite direction to the travel trigger switch, so as to disconnect the power supply circuit; When the magnetic feed slide is in the middle stroke range, the drive plate presses down the corresponding trigger rod through the mating surface to close the stroke trigger switch, connect the power supply circuit, and energize the electromagnetic adsorption component. The drive plates and trigger positions of the trigger rods of the two cleaning components are staggered along the feed direction so that when one electromagnetic adsorption component is energized, the other electromagnetic adsorption component is de-energized.

2. The magnetic cutting device according to claim 1, characterized in that, Each of the drive plates has a partially pressing convex section on its mating surface for pressing down the trigger rod. The front and rear sides of the partially pressing convex section are straight sections that avoid the trigger rod. In the two cleaning components, the two partially pressing convex sections are staggered along the feed direction so that the two drive plates press down the corresponding trigger rods in sequence.

3. The magnetic cutting device according to claim 2, characterized in that, The two ends of the local pressing convex section are formed as a smoothly transitioning inlet slope and outlet slope; within the middle stroke range, the orthographic projection contours of the two local pressing convex sections in the feed direction do not overlap.

4. The magnetic cutting device according to claim 1, characterized in that, On the adsorption surface of the electromagnetic adsorption component facing the circular saw blade, a non-magnetic limiting block protruding from the adsorption surface is fixed; there is an anti-air suction gap between the limiting block and the side wall of the circular saw blade.

5. The magnetic cutting device according to claim 1, characterized in that, It also includes a centering auxiliary cleaning mechanism located under the workbench, which includes: Two swing arms are symmetrically arranged on both sides of the circular saw blade. The middle part of each swing arm is hinged to the bottom of the worktable, and the rear section of the swing arm has a swing engagement part. Auxiliary brush, rotatably mounted on the front end of the swing arm; The transmission component is mounted on the worktable in the vertical direction; An auxiliary elastic element is connected between the two swing arms to apply a force to the two swing arms to drive the two auxiliary brushes to move in opposite directions. Each of the drive plates is provided with a pushing part extending along the feed direction. The pushing part cooperates with the transmission component to drive the two auxiliary brushes to move closer to each other and bring the auxiliary brushes close to or against the side wall of the circular saw blade, so as to mechanically disturb and peel off the debris adhering to the surface of the circular saw blade before the electromagnetic adsorption component is energized and adsorbed.

6. The magnet cutting device according to claim 5, characterized in that, The drive plate includes a vertical plate segment, and a horizontally protruding horizontal plate segment is provided on the side wall of the vertical plate segment. The bottom surface of the vertical plate segment forms the mating surface, and the bottom surface of the horizontal plate segment forms the pushing part.

7. The magnetic cutting device according to claim 5, characterized in that, The workbench is provided with a fixed sleeve below it. The transmission component is a mating rod that is movably inserted into the fixed sleeve. The top of the mating rod abuts against the pushing part. A lifting spring that drives the mating rod to move upward is connected between the mating rod and the fixed sleeve. The swing mating part is an inclined guide groove provided on the inner side of the rear section of the swing arm. The mating rod moves downward to open the swing arm through the inclined mating.

8. The magnetic cutting device according to claim 1, characterized in that, The travel trigger switch includes a hollow guide sleeve fixed below the workbench, a trigger rod that is guided through the hollow guide sleeve, and an elastic reset element that is a reset compression spring sleeved on the outer periphery of the trigger rod. The inner end of the trigger rod extends into the hollow guide sleeve and is provided with a moving contact. The bottom of the hollow guide sleeve is provided with a stationary contact that is electrically connected to the power supply circuit.

9. The magnetic cutting device according to claim 1, characterized in that, The worktable has through slots parallel to the feed direction on both sides of the cutting edge. The two drive plates pass downward through the corresponding through slots and extend downward to below the lower bottom beam of the worktable.

10. The magnetic cutting device according to claim 1, characterized in that, The magnet feed slide is equipped with two-way clamping cylinders arranged laterally opposite each other. The piston ends of the two-way clamping cylinders are respectively connected to wear-resistant clamping plates for clamping the long strip of magnet blank from both sides.

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