Pulse-controlled band sawing machine

Abstract

This invention provides a pulse-controlled band saw, including a base, a crossbeam on the base, a band saw wheel and a band saw motor on the crossbeam, a band saw blade mounted on the band saw wheel, a guide arm on the crossbeam, and a discharge table below the crossbeam. It also includes a pulse control device connected to the guide arm. The pulse control device includes a fixed frame connected to the guide arm and a roller connected to the band saw blade. A vibrating rod is connected to the roller, and a first spring is sleeved on the outer side of the vibrating rod. A vibrating rod connecting end is located at the top of the vibrating rod, and a retainer is connected to the vibrating rod connecting end. The retainer is fixed to the upper surface of the fixed frame, and an iron core is also connected to the retainer. A coil is mounted on the iron core, and a threaded sleeve is located on the upper surface of the iron core. The advantages are that it not only achieves vibration chip breaking of the band saw blade, but also has an adjustable vibration frequency and a simple and easy-to-operate structure.

Description

Technical Field

[0001] This invention relates to the technical field of band saws, and more specifically to a pulse-controlled band saw. Background Technology

[0002] Metal cutting is a highly complex process involving elastic and plastic deformation, encompassing disciplines such as elasticity mechanics, plasticity mechanics, and fracture mechanics. As modern manufacturing industries develop towards higher efficiency, higher precision, and energy and material conservation, sawing, as the first step in metal processing, has become a crucial component of parts manufacturing.

[0003] Experiments have shown that of the energy consumed during sawing, aside from 1%–2% used to form new surfaces and create latent energy through lattice distortion, 98%–99% is converted into heat. Therefore, it can be approximated that all the energy consumed during sawing is converted into heat. This significant heat raises the temperature of the sawing zone, directly affecting tool wear and lifespan, as well as the machining accuracy and surface quality of the workpiece. Traditional sawing techniques are struggling to significantly improve sawing efficiency beyond this bottleneck; therefore, we need an unconventional sawing method to enhance both efficiency and precision.

[0004] A patent publication number CN112388060B was found, entitled "A High-Speed ​​Intelligent Band Saw," which specifically discloses a high-speed intelligent band saw, comprising: a bed for placing and clamping transported materials; a saw frame disposed above the bed, on which a drive wheel and a driven wheel driven by a main motor are rotatably connected, and a saw blade is fitted on the drive wheel and the driven wheel; a tension detection device for detecting and adjusting the tension of the saw blade; a saw back pressure feedback device for detecting the pressure on the back of the saw blade; and a servo lifting drive system that controls the lifting speed of the saw frame through feedback values ​​of the saw blade back pressure and the output torque of the main motor, and controls the rotational speed of the main motor through feedback values ​​of the lifting speed of the saw frame. Due to material properties, long chips are generated when sawing certain materials. Excessive chip length affects sawing accuracy and efficiency. This invention incorporates a pulse chip-breaking device. A pressure point component presses on the back of the saw band at a specific frequency, causing the band to vibrate up and down, thus promptly cutting or dislodging chips. Simultaneously, because the pressure point component continuously contacts the back of the saw band, a pressure feedback device, such as a pressure sensor, is integrated onto the side of the pressure point component in contact with the back of the saw band. This allows for timely feedback of the pressure value to the lifting servo motor, integrating the chip-breaking and feedback functions into the same mechanism. Preferably, the pressure point component and the pulse chip-breaking device are elastically hinged. The pulse chip-breaking device includes a dial driven by a servo motor. The dial has a circumferentially oriented actuating surface on the side near the pressure point component, which adheres to the surface of the pressure point component. As the dial rotates, the actuating surface causes the pressure point component to vibrate. A servo motor drives the dial wheel to rotate and controls its speed. The dial surface is undulating around the circumference and includes spaced-down pressing parts and lifting parts. The dial surface abuts against the outer surface of the pressure point. When the dial wheel rotates at a certain angle, the pressing part of the dial surface (which can be flat or convex) is in contact with the pressure point, and the pressure point is pressed against the saw blade, causing the saw blade to press down. As the dial wheel continues to rotate, the protruding part of the dial surface moves away from the pressure point, and the pressure point is lifted up under the action of elasticity. The lifting part of the dial surface (which can be concave or flat) then comes into contact with the pressure point, and the pressure point moves away from the saw blade, causing the saw blade to lift up. This cycle repeats, and the saw blade vibrates up and down. Furthermore, the pressure point component has a rotating shaft at one end near the dial wheel, and a bearing is fitted onto the shaft. The lower pressing part of the actuating surface is flat, while the upper part is a concave surface with the same curvature as the outer circumference of the bearing. The circumference of the bearing is in contact with the actuating surface. The actuating surface drives the bearing to rotate, causing the end of the pressure point component to vibrate up and down. This structure avoids hard contact between the dial wheel and the pressure point component, reduces wear on both the dial wheel and the pressure point component, and extends their service life. Since the material and shape affect the sawdust pattern, the servo motor can adjust its speed according to the material being cut, thereby adjusting the sawdust frequency.

[0005] Analysis of the above-mentioned publicly available materials shows that although chip breaking devices can achieve chip breaking effects by using a pulse chip breaking device and employing the combination of a dial wheel and a concave arc surface to achieve vibration, the vibration effect is poor and the frequency cannot be adjusted. Summary of the Invention

[0006] In view of this, the present invention provides a pulse-controlled band saw that can not only achieve chip breaking by vibration of the band saw blade, but also has an adjustable vibration frequency and a simple and easy-to-operate structure.

[0007] To solve the above-mentioned technical problems, the present invention provides a pulse-controlled band saw, including a base, a crossbeam mounted on the base, a band saw wheel and a band saw motor mounted on the crossbeam, a band saw blade mounted on the band saw wheel, a guide arm mounted on the crossbeam, and a discharge table located below the crossbeam.

[0008] A pulse control device, which is connected to a guide arm;

[0009] The pulse control device includes a fixed frame connected to the guide arm and a roller connected to the band saw blade. The roller is connected to a vibrating rod, and a first spring is sleeved on the outside of the vibrating rod. The top of the vibrating rod is provided with a vibrating rod connecting end. The vibrating rod protrudes from the vibrating rod connecting end and extends upward. The vibrating rod connecting end is connected to a retainer. The retainer is fixed to the upper end face of the fixed frame. The retainer is also connected to an iron core. A coil is provided on the iron core. The first spring is outside the coil. A screw sleeve is provided on the upper end face of the iron core, and an adjusting screw is connected through the screw sleeve.

[0010] The pulse control device also includes a controller mounted on a fixed frame, which is connected to the coil via a wire and controls the power supply to the coil.

[0011] Furthermore, the fixing frame is fixed to one side of the guide arm by bolts and is set above the band saw blade. The fixing frame is provided with a vertical through hole, in which a vibrating rod is placed. The vibrating rod can slide vertically within the through hole. The lower end of the fixing frame is provided with a grooved ring to limit the horizontal displacement of the vibrating rod.

[0012] Furthermore, the roller is connected to a roller frame, the axis of the roller is set horizontally and perpendicular to the rotation direction of the band saw blade, the outer side of the roller contacts the upper end face of the band saw blade, and the roller frame is fixed to the lower end of the vibrating rod. The action of the vibrating rod drives the band saw blade to vibrate and break chips.

[0013] Furthermore, the first spring is disposed on the upper end face of the vibration rod connection end, and a spring fixing seat is disposed on the lower end of the first spring. The spring fixing seat is fixed on the upper end face of the vibration rod connection end. The first spring is disposed inside the retainer. A first sliding plate is disposed above the first spring. The upper end face of the first spring and the lower end face of the first sliding plate are in contact connection. The first sliding plate is fixed to the top of the iron core and is disposed in the slide groove.

[0014] Furthermore, a second sliding plate is provided on the outer side of the connecting end of the vibration rod. The second sliding plate is a vertically oriented protrusion. A groove is provided on the inner side of the retainer, and the second sliding plate is disposed in the groove.

[0015] Furthermore, a gap is left between the lower end face of the iron core and the connecting end of the vibration rod, and a second spring is connected to the lower end face of the connecting end of the vibration rod. The bottom of the second spring is connected to the upper end face of the fixing seat, and the second spring is sleeved on the vibration rod.

[0016] Furthermore, a threaded sleeve with a protruding structure is provided at the middle position of the upper end face of the iron core. The threaded sleeve has an internal thread structure and is connected to an adjusting screw. The adjusting screw passes through the retainer and is rotatably connected to the retainer. The lower end of the adjusting screw is connected to the threaded sleeve. The position of the iron core is adjusted by turning the adjusting screw.

[0017] Furthermore, the controller has a frame on both sides, the frame being two vertical plates, the lower end of which is fixed to the upper surface of the fixed frame. The frame has horizontal insertion holes, and a support plate is installed in each insertion hole. The support plate has insertion holes, and a pressure-sensitive ceramic sheet is installed in each insertion hole. A striker is installed on the pressure-sensitive ceramic sheet, and the lower end of the striker is in contact with a contact switch. The contact switch is installed on the controller, and the controller has a coil connector, which is connected to the coil through the coil connector and wiring.

[0018] Furthermore, the support plate is provided with slots, and the slots are provided with spaced connection contacts for connecting the terminals on the pressure-sensitive ceramic sheet. The upper end face of the frame is provided with a power supply connector, which can make contact with the connection contacts.

[0019] Furthermore, a locking screw is provided on one side of the frame for locking the bearing plate.

[0020] The beneficial effects of the above-described technical solution of the present invention are as follows:

[0021] 1. By using a pulse control device, a certain regular and controllable excitation is applied to the sawing tool or workpiece, so that the tool and workpiece can achieve intermittent sawing in an elliptical motion.

[0022] 2. It enables timely chip breaking, reducing sawing resistance and heat accumulation. Pulse sawing allows for better surface quality and processing results at the same processing speed, while also effectively reducing processing temperature, stabilizing the processing, and minimizing tool wear, especially effective for sawing high-performance alloy materials.

[0023] 3. Compared to the vibration method achieved by the combination of the dial and the concave arc surface, this technology achieves a more sensitive response, higher vibration frequency, and easier control through pulse electromagnetic induction.

[0024] 4. By utilizing the pulse vibration sensitivity of the pressure-sensitive ceramic sheet, the vibration mode of the pressure-sensitive ceramic sheet is combined with the electromagnetic induction structure to achieve the effect of vibration amplification through the mechanical structure, which also has the effect of vibration amplifier. Then, this vibration effect is applied to the chip breaking operation of the band saw blade. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 for Figure 1 Front view of the guide arm and pulse control device;

[0027] Figure 3 for Figure 2 Axonometric drawing;

[0028] Figure 4 for Figure 3 Enlarged view of section A;

[0029] Figure 5 for Figure 3 A structural diagram from another perspective;

[0030] Figure 6 A schematic diagram of the connection structure of the fixed frame, retainer, vibrating rod, first spring, coil, and second spring;

[0031] Figure 7 for Figure 6 Enlarged view of section B;

[0032] In the diagram: 1. Base; 2. Crossbeam; 3. Band saw wheel; 4. Band saw motor; 5. Band saw blade; 6. Discharge platform; 7. Guide arm; 8. Pulse control device; 9. Fixing frame; 10. Vibrating rod; 11. Roller frame; 12. Roller; 13. First spring; 14. Cage; 15. Adjusting screw; 16. Controller; 17. Coil; 18. Vibrating rod connection end; 19. Screw sleeve; 20. First sliding plate; 21. Slide groove; 22. Iron core; 23. Second sliding plate; 24. Spring fixing seat; 25. Frame; 26. Insertion hole; 27. Bearing plate; 28. Slot; 29. ​​Connecting contact point; 30. Power supply connector; 31. Locking screw; 32. Pressure-sensitive ceramic plate; 33. Impact pin; 34. Contact switch; 35. Coil connector; 36. Second spring. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of the present invention. Figures 1 to 7 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0034] Figures 1 to 7 As shown:

[0035] Example 1

[0036] A pulse-controlled band saw includes a base 1, a crossbeam 2 mounted on the base 1, a band saw wheel 3 and a band saw motor 4 mounted on the crossbeam 2, a band saw blade 5 mounted on the band saw wheel 3, a guide arm 7 mounted on the crossbeam 2, and a discharge table 6 located below the crossbeam 2. The device also includes a pulse control device 8 connected to the guide arm 7. The pulse control device 8 includes a fixed frame 9 connected to the guide arm 7 and a roller 12 in contact with the band saw blade 5. A vibrating rod 10 is connected to the roller 12, and a sleeve is fitted around the vibrating rod 10. The device includes a first spring 13, a vibration rod connecting end 18 at the top of the vibration rod 10, a retainer 14 connected to the vibration rod connecting end 18, the retainer 14 fixed to the upper end face of the fixed frame 9, an iron core 22 connected to the retainer 14, a coil 17 mounted on the iron core 22, a threaded sleeve 19 mounted on the upper end face of the iron core 22, and an adjusting screw 15 connected to the threaded sleeve 19; the pulse control device 8 also includes a controller 16 mounted on the fixed frame 9, the controller 16 connected to the coil 17 via a wire and controlling the power supply to the coil 17.

[0037] In this embodiment, the base 1 is fixed on the workbench, and a crossbeam 2 is installed on the base 1. Band saw wheels 3 are installed at both ends of the crossbeam 2, and the band saw wheels 3 are connected to a band saw motor 4. Driven by the band saw motor 4, the band saw wheels 3 rotate. The band saw wheels 3 include a main band saw wheel 3 and a driven band saw wheel 3. A band saw blade 5 is installed on the band saw wheels 3, and the workpiece is cut by the band saw blade 5. A discharge platform 6 is set below the crossbeam 2. After the workpiece is cut by the band saw blade 5, it is transported out from the discharge platform 6. A guide arm 7 is set on the crossbeam 2, and a pulse control device 8 is set on the side of the guide arm 7.

[0038] During cutting, if the metal chips are not removed in time, they will be strip-shaped. If the chips are not broken in time, it will reduce the sawing resistance and aggravate the accumulation of sawing heat. Therefore, it is necessary to break the chips in time. Due to the high speed of the band saw blade 5, it is necessary to control the vibration of the band saw blade 5 with pulse and adjust the vibration frequency to ensure timely chip breaking.

[0039] Specifically, a fixing frame 9 is installed on the guide arm 7, and a vibrating rod 10 is mounted on the fixing frame 9. A roller 12 is connected to the lower end of the vibrating rod 10, and the roller 12 contacts the upper end face of the band saw blade 5. A first spring 13 is sleeved on the vibrating rod 10 for returning the vibrating rod 10 to its original position. A vibrating rod connecting end 18 is provided at the top of the vibrating rod 10. The vibrating rod connecting end 18 is made of iron and is connected to a retainer 14. A coil 17 and an iron core 22 are also provided on the retainer 14. The coil 17 is connected to a controller 16, which contains a battery and is connected to an external power supply line. By switching the coil 17 on and off, the vibrating rod 10 can move up and down, thereby causing the roller 12 to vibrate and collide with the band saw blade 5, achieving the purpose of chip breaking.

[0040] Example 2

[0041] The fixing frame 9 is fixed to one side of the guide arm 7 by bolts and is set above the band saw blade 5. The fixing frame 9 is provided with a vertical through hole, and a vibrating rod 10 is placed in the through hole. The vibrating rod 10 can slide vertically in the through hole. The lower end of the fixing frame 9 is provided with a grooved ring to limit the displacement of the vibrating rod 10 in the horizontal direction.

[0042] Unlike the above embodiments, in this embodiment, the fixing frame 9 is bolted to one side of the guide arm 7. Since the band saw blade 5 needs to be vibrated regularly by vibration, the fixing frame 9 is set above the band saw blade 5. A through hole structure is provided on the fixing frame 9, and a vibration rod 10 is placed inside. That is, the vibration rod 10 is set in a vertical direction. In order to limit the horizontal rotation of the vibration rod 10, a grooved ring is provided at the lower end of the fixing frame 9.

[0043] Example 3

[0044] The roller 12 is connected to the roller frame 11. The axis of the roller 12 is set in the horizontal direction and is perpendicular to the rotation direction of the band saw blade 5. The outer side of the roller 12 contacts the upper end face of the band saw blade 5. The roller frame 11 is fixed to the lower end of the vibrating rod 10. The action of the vibrating rod 10 drives the band saw blade 5 to vibrate and break chips.

[0045] Unlike the above embodiments, in this embodiment, the roller 12 is connected to the roller frame 11, the roller frame 11 is fixedly connected to the vibrating rod 10, and the roller 12 is in close contact with the upper end face of the band saw blade 5. The vibration of the vibrating rod 10 drives the band saw blade 5 to vibrate and break chips.

[0046] Example 4

[0047] The first spring 13 is disposed on the upper end face of the vibration rod connecting end 18. The lower end of the first spring 13 is provided with a spring fixing seat 24, which is fixed to the upper end face of the vibration rod connecting end 18. The first spring 13 is disposed inside the retainer 14. A first slide plate 20 is disposed above the first spring 13. The upper end face of the first spring 13 is in contact with the lower end face of the first slide plate 20. The first slide plate 20 is fixed to the top of the iron core and is disposed in the slide groove 21.

[0048] Unlike the above embodiments, in this embodiment, the first spring 13 is disposed on the upper end face of the vibration rod connection end 18, and a grooved spring fixing seat 24 is disposed at the bottom of the first spring 13. The spring fixing seat 24 is annular, the bottom of the first spring 13 is fixed in the spring fixing seat 24, and the top of the first spring 13 contacts the lower end face of the first slide plate 20. The first spring 13 is used for the vibration rod 10 to return to its original position after the coil 17 is de-energized.

[0049] Example 5

[0050] The outer side of the vibration rod connecting end 18 is provided with a second sliding plate 23, which is a vertically oriented protrusion plate. The inner side of the retainer 14 is provided with a sliding groove 21, and the second sliding plate 23 is disposed in the sliding groove 21.

[0051] Unlike the above embodiments, in this embodiment, in order to maintain the stable vibration of the vibrating rod 10, a second sliding plate 23 is provided on the outer side of the vibrating rod connection end 18, and a sliding groove 21 is provided on the inner side of the retainer 14. The second sliding plate 23 is placed in the sliding groove 21, so that it can move up and down stably when the vibrating rod 10 vibrates.

[0052] Example 6

[0053] There is a gap between the lower end face of the iron core 22 and the connecting end 18 of the vibration rod. The lower end face of the connecting end 18 of the vibration rod is in contact with the second spring 36. The bottom of the second spring 36 is in contact with the upper end face of the fixing frame 9. The second spring 36 is sleeved on the vibration rod 10.

[0054] Unlike the above embodiments, in this embodiment, a certain distance is maintained between the lower end of the iron core 22 and the upper end face of the vibrating rod connecting end 18. After the coil 17 is energized, the iron core 22 becomes magnetic, attracting the vibrating rod connecting end 18 to move upward, thereby driving the vibrating rod 10 upward. After the coil 17 is de-energized, the vibrating rod connecting end 18 returns to its original position under the action of the first spring 13. In this embodiment, a second spring 36 is introduced. The setting of the second spring 36 can effectively avoid hard contact between the second slide plate 23 and the bottom of the slide groove 21. It should be noted that when the coil 17 is de-energized, under the action of the first spring 13 and the second spring 36, there is a gap between the top of the vibrating rod connecting end 18 and the lower end face of the iron core 22.

[0055] Example 7

[0056] A threaded sleeve 19 with a protruding structure is provided at the middle position of the upper end face of the iron core 22. The threaded sleeve 19 has an internal thread structure and is connected to an adjusting screw 15. The adjusting screw 15 passes through the retainer 14 and is rotatably connected to the retainer 14. The lower end of the adjusting screw 15 is connected to the threaded sleeve 19. The position of the iron core 22 is adjusted by turning the adjusting screw 15.

[0057] Unlike the above embodiments, in this embodiment, in order to adjust the vibration frequency, a screw sleeve 19 is fixedly provided at the middle position of the upper end face of the iron core 22. The screw sleeve 19 adopts an internal thread structure and is connected to an adjusting screw 15. The adjusting screw 15 passes through the top panel of the retainer 14, and the adjusting screw 15 is rotatably connected to the top panel of the retainer 14, that is, the retainer 14 supports the adjusting screw 15.

[0058] Example 8

[0059] The controller 16 has a frame 25 on both sides. The frame 25 consists of two vertical plates, the lower end of which is fixed to the upper surface of the fixing frame 9. The frame 25 has a horizontal insertion hole 26. A support plate 27 is installed in the insertion hole 26. A pressure-sensitive ceramic sheet 32 ​​is installed in the insertion hole 26. A striker 33 is installed on the pressure-sensitive ceramic sheet 32. The lower end of the striker 33 is in contact with a contact switch 34. The contact switch 34 is installed on the controller 16. The controller 16 has a coil connector 35, which is connected to the coil 17 through the coil connector 35 and the wiring.

[0060] Unlike the above embodiments, in this embodiment, a pressure-sensitive ceramic sheet 32 ​​is used to vibrate in order to achieve vibration sensitivity. A circuit is connected to the pressure-sensitive ceramic sheet 32. With the external AC power connected, the pressure-sensitive ceramic sheet 32 ​​vibrates regularly. A striker 33 is set on the pressure-sensitive ceramic sheet 32, and the striker 33 also begins to vibrate regularly. A contact switch 34 is set at the position where it contacts the striker 33. The contact switch 34 is set on the controller 16, which can realize the power on and off of the controller 16, and thus realize the power on and off of the coil 17.

[0061] Example 9

[0062] The support plate 27 is provided with a slot 28, and the slot 28 is provided with spaced connection contacts 29 for connecting the terminals on the pressure-sensitive ceramic sheet 32. The upper end face of the frame 25 is provided with a power supply connector 30, which can make contact with the connection contacts 29.

[0063] Unlike the above embodiments, in this embodiment, in order to enable the use of pressure-sensitive ceramic sheets 32 of different lengths, a slot 28 is provided on the support plate 27. The slot 28 is used to place the pressure-sensitive ceramic sheet 32. The slot 28 is provided with spaced connection contacts 29, which can be used to contact the connection points on the pressure-sensitive ceramic sheet 32. A power supply connector 30 is also provided on the frame 25, which can supply power after contacting the connection contacts 29.

[0064] Example 10

[0065] A locking screw is provided on one side of the frame 25 for locking the bearing plate 27.

[0066] Unlike the above embodiments, in this embodiment, a locking screw is provided on one side of the frame 25 and is threadedly connected to the frame 25. After adjusting the bearing plate 27, it is used to lock and fix the bearing plate 27.

[0067] The working method (or working principle) of this invention:

[0068] During operation, the pulse control device 8 is bolted to one side of the guide arm 7 on the band saw. After adjusting the position, ensure that the roller 12 contacts the upper end face of the band saw blade 5. Install the pressure-sensitive ceramic sheet 32 ​​in the slot 28. At this time, the position of the support plate 27 can be adjusted by loosening the locking screw 31. After the pressure-sensitive ceramic sheet 32 ​​is placed in the slot 28, make contact with the connecting point 29 on the pressure-sensitive ceramic sheet 32, and then fix it with the locking screw 31. After fixing, connect the power supply connector 30 to the AC power. When installing, the striking pin 33 on the pressure-sensitive ceramic sheet 32 ​​should contact the contact switch 34. After AC power is applied to the pressure-sensitive ceramic sheet 32, the middle position vibrates. At this time, the movement of the striking pin 33 strikes the contact switch 34, realizing the control of the battery power supply by the contact switch 34.

[0069] In actual operation, the controller 16, under the action of the contact switch 34, realizes the regular on and off power action, thereby realizing the on and off power operation of the coil connector 35 and coil 17 connected to the controller 16. When the coil 17 is energized, the iron core 22 will have magnetic switching. After being energized, the iron core 22 is magnetic, which drives the vibrating rod 10 to rise. After being de-energized, the iron core 22 is demagnetized, and the vibrating rod 10 returns to its original position under the action of the first spring 13, realizing the up and down movement of the vibrating rod 10. The up and down vibration of the vibrating rod 10 drives the roller frame 11 and roller 12 connected to the bottom of the vibrating rod 10 to vibrate up and down, thereby realizing the vibration chip breaking of the band saw blade 5.

[0070] In this invention, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A pulse-controlled band saw, comprising a base (1), a crossbeam (2) mounted on the base (1), a band saw wheel (3) and a band saw motor (4) mounted on the crossbeam (2), a band saw blade (5) mounted on the band saw wheel (3), a guide arm (7) mounted on the crossbeam (2), and a discharge platform (6) located below the crossbeam (2), characterized in that: Also includes A pulse control device (8) is connected to a guide arm (7); The pulse control device (8) includes a fixed frame (9) connected to the guide arm (7) and a roller (12) connected to the band saw blade (5). The roller (12) is connected to a vibrating rod (10). A first spring (13) is sleeved on the outside of the vibrating rod (10). A vibrating rod connecting end (18) is provided at the top of the vibrating rod (10). The vibrating rod (10) protrudes from the vibrating rod connecting end (18) and extends upward. A retainer (14) is fixedly connected to the vibrating rod connecting end (18). The retainer (14) is fixed on the upper end face of the fixed frame (9). The retainer (14) is also connected to an iron core (22). A coil (17) is provided on the iron core (22). The first spring (13) is outside the coil (17). A screw sleeve (19) is provided on the upper end face of the iron core (22), and an adjusting screw (15) is connected through the screw sleeve (19). The pulse control device (8) also includes a controller (16) mounted on a fixed frame (9), the controller (16) being connected to a coil (17) via a wire and controlling the power supply to the coil (17); The controller (16) has a frame (25) on both sides. The frame (25) consists of two vertical plates with the lower end fixed to the upper surface of the fixing frame (9). The frame (25) has a horizontal insertion hole (26). The insertion hole (26) has a support plate (27) inside. The support plate (27) has an insertion hole (26). The insertion hole (26) has a pressure-sensitive ceramic sheet (32) inside. The pressure-sensitive ceramic sheet (32) has a striker (33). The lower end of the striker (33) is connected to a contact switch (34). The contact switch (34) is located on the controller (16). The controller (16) has a coil connector (35) and is connected to the coil (17) through the coil connector (35) and the line.

2. The pulse-controlled band saw according to claim 1, characterized in that: The fixing frame (9) is fixed to one side of the guide arm (7) by bolts and is set above the band saw blade (5). The fixing frame (9) is provided with a vertical through hole, and a vibrating rod (10) is placed in the through hole. The vibrating rod (10) can slide vertically in the through hole. The lower end of the fixing frame (9) is provided with a grooved ring to limit the displacement of the vibrating rod (10) in the horizontal direction.

3. A pulse-controlled band saw according to claim 2, characterized in that: The roller (12) is connected to a roller frame (11). The axis of the roller (12) is set horizontally and perpendicular to the rotation direction of the band saw blade (5). The outer side of the roller (12) contacts the upper end face of the band saw blade (5). The roller frame (11) is fixed to the lower end of the vibrating rod (10). The action of the vibrating rod (10) drives the band saw blade (5) to vibrate and break chips.

4. A pulse-controlled band saw according to claim 3, characterized in that: The first spring (13) is disposed on the upper end face of the vibration rod connecting end (18). The lower end of the first spring (13) is provided with a spring fixing seat (24). The spring fixing seat (24) is fixed on the upper end face of the vibration rod connecting end (18). The first spring (13) is disposed inside the retainer (14). The first slide plate (20) is disposed above the first spring (13). The upper end face of the first spring (13) and the lower end face of the first slide plate (20) are in contact connection. The outer side of the vibration rod connecting end (18) is provided with a second slide plate (23). The second slide plate (23) is a vertical protrusion plate. The inner side of the retainer (14) is provided with a groove (21). The second slide plate (23) is disposed in the groove (21), and the first slide plate (20) is disposed in the groove (21).

5. A pulse-controlled band saw according to claim 4, characterized in that: There is a gap between the lower end face of the iron core (22) and the connecting end (18) of the vibration rod. The lower end face of the connecting end (18) of the vibration rod is in contact with a second spring (36). The bottom of the second spring (36) is in contact with the upper end face of the fixing frame (9). The second spring (36) is sleeved on the vibration rod (10).

6. A pulse-controlled band saw according to claim 5, characterized in that: A threaded sleeve (19) with a protruding structure is provided at the middle position of the upper end face of the iron core (22). The threaded sleeve (19) has an internal thread structure. The threaded sleeve (19) is connected to an adjusting screw (15). The adjusting screw (15) passes through the retainer (14). The adjusting screw (15) is rotatably connected to the retainer (14). The lower end of the adjusting screw (15) is connected to the threaded sleeve (19). The position of the iron core (22) is adjusted by turning the adjusting screw (15).

7. A pulse-controlled band saw according to claim 1, characterized in that: The support plate (27) is provided with a slot (28), and the slot (28) is provided with spaced connection contacts (29) for connecting the wire heads on the pressure-sensitive ceramic sheet (32). The upper end face of the frame (25) is provided with a power supply connector (30), and the power supply connector (30) can be connected to the connection contacts (29).

8. A pulse-controlled band saw according to claim 7, characterized in that: A locking screw is provided on one side of the frame (25) for locking the bearing plate (27).

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