High-precision laser cutting machine for sound-damping stepped saw blade base body

Abstract

The application relates to a high-precision laser cutting machine for a sound reduction step saw blade base body, which comprises a rack, a stroke mechanism is installed on the rack, a laser head is connected to the action end of the stroke mechanism, a protective inner cylinder is rotationally connected with the rack, a limiting column is connected to the protective inner cylinder, a placement platform is formed on the limiting column, a plurality of air cutting pieces are circumferentially distributed around the central axis of the protective inner cylinder, the extension surface of the air cutting piece can be tangent to a virtual circle coaxial with the central axis of the protective inner cylinder, a plurality of air outlet holes are formed on the protective inner cylinder, the plurality of air outlet holes are respectively located in the acute angle regions formed between the plurality of air cutting pieces and the protective inner cylinder, the air guide outer cylinder is open at both axial ends, the air guide outer cylinder is connected with the rack, the protective inner cylinder is located in the inner cavity of the air guide outer cylinder, and a waste gas treatment unit is connected to the lower end of the air guide outer cylinder; the application has the effect of improving the problem of the influence of molten slag splashing and harmful gas diffusion on the health of operators.

Description

Technical Field

[0001] This application relates to the technical field of metal cutting equipment, and in particular to a high-precision laser cutting machine for a silent stepped saw blade substrate. Background Technology

[0002] A saw blade is a cutting tool widely used in the processing of hard and brittle materials such as concrete, refractory materials, stone, and ceramics. When cutting objects that are relatively hard or have uneven density distribution, the saw blade will generate a lot of noise due to resonance or different stages of force. In order to reduce the noise level of the saw blade during cutting, sound-absorbing steps are usually processed on the saw blade or damping materials are filled in to reduce noise.

[0003] Since saw blades are mostly made of high-hardness metal materials, the noise-reducing steps on their base and the saw teeth structure on the edge of the saw blade are generally processed by machining or laser cutting. A laser cutting machine is disclosed in related technology, including a machine tool body. The machine tool body has a lifting mechanism, and a worktable assembly is located above the lifting mechanism. The worktable assembly includes a worktable and a worktable pin plate mounted on the worktable. A sheet metal clamping mechanism is located on the Y-axis side of the worktable. Several sheet metal universal translation support mechanisms parallel to the X-axis side of the worktable are located on the worktable pin plate. A crossbeam is located above the X-axis side of the worktable, and a dust extraction mechanism is located below the crossbeam, surrounding the outside of the worktable pin plate.

[0004] The aforementioned technologies have the following drawbacks: During laser cutting, the laser is focused on the saw blade substrate, causing the substrate material to melt or vaporize. Then, an air blower coaxially positioned with the laser beam blows the molten substrate material away from its initial position. During this blowing process, the movement direction of the molten slag is affected by various factors and is therefore uncontrollable, posing a risk of injury from splashing. Furthermore, if the saw blade material vaporizes directly, harmful gases will escape into the surrounding air after being blown away by the air blower, which will also affect the operator's health. Summary of the Invention

[0005] To mitigate the health risks of molten slag splashing and harmful gas emissions to operators, this application provides a high-precision laser cutting machine for a silent step saw blade substrate.

[0006] The high-precision laser cutting machine for the substrate of the noise-reducing step saw blade provided in this application adopts the following technical solution:

[0007] A high-precision laser cutting machine for a silent step saw blade substrate includes:

[0008] A frame on which a travel mechanism is mounted, the actuating end of which is connected to a laser head, the travel mechanism being used to enable the laser head to perform three-dimensional motion in space;

[0009] A protective inner cylinder with an opening at the top is rotatably connected to the frame. A vertically arranged limiting post is connected to the protective inner cylinder, and a placement platform is formed on the limiting post.

[0010] Multiple air-cutting blades are distributed circumferentially around the central axis of the protective inner cylinder, and the extension surface of each air-cutting blade is tangent to a virtual circle coaxial with the central axis of the protective inner cylinder. Multiple rows of air outlets are opened on the protective inner cylinder, and the multiple rows of air outlets are respectively located in the acute angle area formed between the multiple air-cutting blades and the protective inner cylinder.

[0011] An outer air guide cylinder with openings at both ends along the axis is connected to the frame. The inner protective cylinder is located inside the outer air guide cylinder, and the lower end of the outer air guide cylinder is connected to an exhaust gas treatment unit.

[0012] By adopting the above technical solution, the noise-reducing stepped saw blade substrate to be processed is placed on a placement platform, and the shaft hole in the center of the saw blade substrate cooperates with the limiting post to prevent the saw blade substrate from rotating. Then, the stroke mechanism moves to control the position of the laser head, so that the laser head moves along a preset path and processes the saw blade substrate. During the processing, the laser emitted by the laser head melts the material on the saw blade substrate, and some of the material vaporizes. At the same time, the air blowing structure coaxial with the laser head blows out gas to disperse the melted or vaporized material. During processing, the protective inner cylinder rotates. Due to the interception effect of the protective inner cylinder, the dispersed liquid / solid material is blown to the side wall of the protective inner cylinder. At the same time, the rotation of the protective inner cylinder drives multiple cutting blades to rotate. Since the cutting blades have an inclination angle, the centrifugal force applied to the liquid / solid material by the air blowing structure and the rotation of the cutting blades is generated. Under this action, liquid / solid materials pass through the air outlet and enter the outer air guide cylinder, preventing the saw blade substrate material from splashing and injuring people. At the same time, the rotation of the cutting blade also causes the gas in the protective inner cylinder to enter the inner cavity of the outer air guide cylinder. Therefore, outside air enters through the opening on the top wall of the protective inner cylinder, first completing the cooling of the saw blade substrate after cutting, reducing the possibility of secondary deformation or tissue deformation of the saw blade substrate due to excessive temperature. Then, the saw blade substrate material mixed with vaporized material enters the inner cavity of the outer air guide cylinder through the air outlet, and is then treated by the exhaust gas treatment unit. This prevents harmful exhaust gases generated during laser processing from escaping and polluting the environment and affecting the health of operators. It also reduces the range of harmful gas escape, reduces the possibility of vaporized metal gas condensing and adhering randomly after escaping, and reduces the total gas treatment workload of the exhaust gas treatment unit.

[0013] Furthermore, the distance between the air-cutting blade on the side closest to the central axis of the protective inner cylinder and the inner wall of the protective inner cylinder gradually increases from top to bottom.

[0014] By adopting the above technical solution, since the angle between the air cutter and the protective inner cylinder is fixed, but the extension distance of the air cutter gradually increases from top to bottom, when the rotation speed of the protective inner cylinder is the same, the air cutter near the bottom wall of the protective inner cylinder will cut more gas in the protective inner cylinder into the air guide outer cylinder. In other words, the air pressure at the bottom of the inner cavity of the protective inner cylinder is higher than the air pressure at the top of the protective inner cylinder. Therefore, the flow direction of gas in the protective inner cylinder can be effectively controlled, and the possibility of harmful gas escaping from the protective inner cylinder to the outside through the top opening is reduced by the negative pressure principle.

[0015] Furthermore, the air-cutting blade is inclined so that the plane on which the air-cutting blade is located is not parallel to the central axis of the protective inner cylinder.

[0016] By adopting the above technical solution, the inclined air-cutting blades designed can produce an effect similar to fan blades after rotating with the protective inner cylinder, further enhancing the gas flow direction in the protective inner cylinder.

[0017] Furthermore, a wall scraper is slidably connected to the outer wall of the protective inner cylinder, and multiple springs are connected between the protective inner cylinder and the wall scraper, with the sliding direction of the wall scraper arranged radially along the protective inner cylinder.

[0018] By adopting the above technical solution, the designed wall scraper can achieve contact or separation between the wall scraper and the inner wall of the air guide outer cylinder by controlling the rotation speed of the protective inner cylinder, thereby scraping off the saw blade substrate material that has cooled and adhered to the inner cylinder of the air guide outer cylinder.

[0019] Furthermore, the wall scrapers are spirally distributed around the central axis of the protective inner cylinder, and when the protective inner cylinder rotates relative to the air guide outer cylinder, the wall scrapers cause the gas in the air guide outer cylinder to move towards one end of the waste gas treatment unit.

[0020] By adopting the above technical solution, the spiral-shaped scraper blade can cause the gas in the gap between the protective inner cylinder and the air guide outer cylinder to move towards the waste gas treatment unit. Furthermore, as more molten slag or waste gas is generated by laser processing, the rotation speed of the protective inner cylinder is increased accordingly. At this time, the gap between the scraper blade and the inner wall of the air guide outer cylinder becomes smaller, which is equivalent to increasing the effective area of ​​the scraper blade, thereby generating a stronger gas driving force and increasing the flow speed of the waste gas.

[0021] Furthermore, the outer air guide cylinder is rotatably connected to the frame, and the bottom wall of the outer air guide cylinder is connected to the waste gas treatment unit via a rotating sealed bearing.

[0022] By adopting the above technical solution, the designed rotating air guide outer cylinder can extend the service life of the scraper blade by reducing the relative speed difference between the protective inner cylinder and the air guide outer cylinder when the rotation speed of the protective inner cylinder is increased, thereby causing the scraper blade to come into contact with the inner wall of the air guide outer cylinder to scrape off the adhering saw blade substrate material.

[0023] Furthermore, the exhaust gas treatment unit includes:

[0024] A liquid storage ring is slidably connected to the outer air guide cylinder, and the liquid storage ring slides along the axial direction of the outer air guide cylinder. A liquid-containing cavity for storing absorbent is formed inside the liquid storage ring.

[0025] The filter body is connected to the liquid storage ring, and the peripheral edge of the filter body extends into the liquid-containing cavity. The thickness of the filter body gradually increases from the middle to the periphery, and the filter body and the liquid storage ring cooperate to divide the inner cavity of the air guide outer cylinder into two chambers.

[0026] An exhaust gas collection pipe, one end of which is connected to the lower end of the outer air guide cylinder via a rotating sealed bearing.

[0027] By adopting the above technical solution, as the scraper blade drives the outer air guide cylinder to rotate through the adhered saw blade substrate material, the liquid storage ring and filter body will rotate accordingly. At this time, the harmful substances adsorbed in the filter body will move towards one end of the liquid storage ring under the action of centrifugal force, and finally enter the inner cavity of the liquid storage ring and fuse with the absorbent in the inner cavity of the liquid storage ring. Since the rotation of the liquid storage ring is intermittent, when the liquid storage ring changes from a stationary state to a rotating state, the absorbent in the liquid storage ring will fluctuate accordingly, thereby better fusing with the harmful substances thrown out by centrifugal force.

[0028] Furthermore, multiple wiping rods are slidably connected to the inner protective cylinder. One end of each wiping rod extends into the inner cavity of the inner protective cylinder and forms a wiping area. The wiping area is slidably connected to the side wall of the air cutter, and one end of each wiping rod slidably abuts against the filter body.

[0029] By adopting the above technical solution, the designed wiping rod can move along the cutting blade setting direction by controlling the rotation speed of the protective inner cylinder, thereby scraping off the saw blade substrate material attached to the cutting blade.

[0030] Furthermore, the erasing lever includes:

[0031] The abutting ball portion slides against the filter body;

[0032] A round rod sliding part, one end of which is connected to the abutting ball part, and the round rod sliding part passes through and is slidably connected to the protective inner cylinder;

[0033] The flat erasing part is connected at one end to the round rod sliding part, and the flat erasing part has multiple through grooves to form multiple erasing areas.

[0034] By adopting the above technical solution, the designed wiping rod with its segmented arrangement can achieve the scraping of the saw blade substrate attached to the side wall of the cutting blade while reducing the overall sliding distance of the wiping rod. Furthermore, when the rotation speed of the protective inner cylinder is high, the flat wiping part is set close to the bottom of the protective inner cylinder. At this time, the pressure difference between the bottom and top of the protective inner cylinder is large, which is more conducive to enhancing the flow of gas in the protective inner cylinder.

[0035] Furthermore, multiple springs are connected between the liquid storage ring and the outer air guide cylinder to reduce the distance between the liquid storage ring and the inner protective cylinder.

[0036] By adopting the above technical solution, the designed spring can be used in conjunction with the rotation speed of the protective inner cylinder to adjust the relative position of the wiping rod and the air-cutting blade.

[0037] In summary, the beneficial technical effects of this application are as follows:

[0038] 1. During processing, the inner protective cylinder rotates. Due to the interception effect of the inner protective cylinder, the dispersed liquid / solid material is blown onto the side wall of the inner protective cylinder. Simultaneously, the rotation of the inner protective cylinder drives multiple cutting blades to rotate. Because the cutting blades have an angle, under the centrifugal force applied to the liquid / solid material by the air blowing structure and the rotation of the cutting blades, the liquid / solid material passes through the air outlet and enters the outer air guide cylinder, preventing the saw blade base material from splashing and causing injury. At the same time, the rotation of the cutting blades also causes gas from the inner protective cylinder to enter the inner cavity of the outer air guide cylinder, thus allowing outside air to pass through the inner protective cylinder. The saw blade substrate enters through the opening in the top wall of the cylinder, and is first cooled after cutting. This reduces the possibility of secondary deformation or structural deformation of the saw blade substrate due to excessive temperature. Then, the vaporized saw blade substrate material enters the inner cavity of the outer cylinder through the air outlet and is then treated by the exhaust gas treatment unit. This prevents harmful exhaust gases generated during laser processing from escaping and polluting the environment and affecting the health of operators. It also reduces the range of harmful gas escape, reduces the possibility of vaporized metal gas condensing and adhering randomly after escaping, and reduces the total gas treatment workload of the exhaust gas treatment unit.

[0039] 2. Since the angle between the air cutter and the inner protective cylinder is fixed, but the extension distance of the air cutter gradually increases from top to bottom, when the rotation speed of the inner protective cylinder is the same, the air cutter near the bottom wall of the inner protective cylinder will cut more gas in the inner protective cylinder into the outer air guide cylinder. In other words, the air pressure at the bottom of the inner cavity of the inner protective cylinder is higher than that at the top of the inner protective cylinder. Therefore, the air flow direction in the inner protective cylinder can be effectively controlled, and the possibility of harmful gases escaping from the inner protective cylinder to the outside through the top opening is reduced by the negative pressure principle.

[0040] 3. The spiral-shaped scraper blades allow the gas in the gap between the inner protective cylinder and the outer air guide cylinder to move towards the waste gas treatment unit. Furthermore, as more molten slag or waste gas is generated from laser processing, the rotation speed of the inner protective cylinder increases accordingly. At this time, the gap between the scraper blades and the inner wall of the outer air guide cylinder becomes smaller, which is equivalent to increasing the effective area of ​​the scraper blades, thereby generating a stronger gas driving force and increasing the flow speed of the waste gas.

[0041] 4. As the scraper blade rotates the air guide cylinder through the adhered saw blade substrate material, the liquid storage ring and filter body rotate accordingly. At this time, the harmful substances adsorbed in the filter body will move towards one end of the liquid storage ring under the action of centrifugal force, and finally enter the inner cavity of the liquid storage ring and fuse with the absorbent in the inner cavity of the liquid storage ring. Since the rotation of the liquid storage ring is intermittent, when the liquid storage ring changes from a stationary state to a rotating state, the absorbent in the liquid storage ring will fluctuate accordingly, thereby better fusing with the harmful substances thrown out by centrifugal force. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0043] Figure 2 yes Figure 1 A schematic diagram of the structure behind the hidden frame, travel mechanism, and laser head;

[0044] Figure 3 yes Figure 2 Top view.

[0045] Figure 4 yes Figure 2 A cross-sectional view of the concealed air guide tube.

[0046] Figure 5 yes Figure 3 A sectional view.

[0047] Figure 6 yes Figure 5 A magnified structural diagram of part A in the diagram.

[0048] Figure 7 yes Figure 5 A schematic diagram of the eraser bar.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Frame; 11. Stroke mechanism; 12. Laser head;

[0051] 2. Protective inner cylinder; 21. Limiting post; 22. Air outlet;

[0052] 3. Air cutter blade;

[0053] 4. Air guide outer cylinder;

[0054] 5. Exhaust gas treatment unit; 51. Liquid storage ring; 511. Slag inlet; 52. Filter body; 53. Exhaust gas collection pipe;

[0055] 6. Wall scraper;

[0056] 7. Erasing rod; 71. Ball contact part; 72. Round rod sliding part; 73. Flat erasing part. Detailed Implementation

[0057] The following will be combined with the appendix Figure 1 To be continued Figure 7 The technical solutions of this application have been clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] This application discloses a high-precision laser cutting machine for a noise-reducing stepped saw blade substrate, referring to... Figure 1 It includes a frame 1, a stroke mechanism 11, and a laser head 12. The frame 1 is fixed to the reinforced ground by anchor bolts to reduce the possibility of the frame 1 moving due to vibration. The stroke mechanism 11 is installed on the frame 1, and the laser head 12 is connected to the moving end of the stroke mechanism 11. The stroke mechanism 11 drives the laser head 12 to perform three-dimensional motion in space, thereby using the laser head 12 to process the base of the noise-reducing saw blade. In this application, the stroke mechanism 11 can be a three-axis platform, a manipulator with three or more degrees of freedom, or any other structure that can realize the three-dimensional motion of the laser head 12.

[0059] Reference Figure 1 and Figure 2On the outside of the frame 1, because the unidirectional dimensions of some workpieces exceed the limits, such as pipes, the outside of the frame 1 is usually in an open state. Even if a protective cover is installed on the outside of some laser cutting equipment, the volume of the protective cover is usually large, and the gas inside is relatively static, making it difficult to achieve rapid, concentrated, and effective cooling of the parts to be processed. Furthermore, harmful gases escape throughout the protective cover, resulting in a large gas handling volume. At this time, because the gas blowing structure will blow the material melted or vaporized by the laser head 12 from the processing area of ​​the saw blade substrate material during laser processing, there is a possibility of high-temperature slag splashing or harmful gas escaping. Corresponding structural improvements are needed to solve the above problems.

[0060] Reference Figure 2 Specifically, in this embodiment, the high-precision laser cutting machine for the sound-absorbing step saw blade substrate also includes a protective inner cylinder 2, a limiting post 21, and multiple cutting blades 3. The top of the protective inner cylinder 2 is open, and the protective inner cylinder 2 is rotatably connected to the frame 1. The rotation axis of the protective inner cylinder 2 is vertically set. The limiting post 21 is located in the inner cavity of the protective inner cylinder 2, and the limiting post 21 is coaxially welded to the bottom wall of the protective inner cylinder 2. A placement platform is formed on the limiting post 21, and the limiting post 21 itself has an anti-rotation step for cooperating with the central hole on the sound-absorbing step saw blade substrate.

[0061] Reference Figure 3 and Figure 4 Multiple air-cutting blades 3 are evenly distributed around the central axis of the protective inner cylinder 2, and the extension surface of the air-cutting blades 3 can be tangent to a virtual circle coaxial with the central axis of the protective inner cylinder 2. Multiple air outlets 22 are opened on the protective inner cylinder 2, and the multiple air outlets 22 are respectively located in multiple acute angle areas formed between the protective inner cylinder 2 and the multiple air-cutting blades 3. When the protective inner cylinder 2 rotates, the air-cutting blades 3 cause the gas in the protective inner cylinder 2 to be discharged through the air outlets 22.

[0062] Reference Figure 4 It also includes an outer air guide cylinder 4 and an exhaust gas treatment unit 5. The outer air guide cylinder 4 has openings at both ends along its axial direction. The outer air guide cylinder 4 is connected to the frame 1 and is coaxially arranged with the inner protective cylinder 2. The outer air guide cylinder 4 covers the outside of the inner protective cylinder 2. The bottom opening of the outer air guide cylinder 4 is connected to the inlet end of the exhaust gas treatment unit 5. The top opening of the outer air guide cylinder 4 is rotatably connected to the inner protective cylinder 2 through a rotating sealed bearing.

[0063] Reference Figure 4 and Figure 5Specifically, the distance between the side of the air-cutting blade 3 closest to the central axis of the inner protective cylinder 2 and the inner wall of the inner protective cylinder 2 gradually increases from top to bottom. Since the angle between the air-cutting blade 3 and the inner protective cylinder 2 is fixed, but the extension distance of the air-cutting blade 3 gradually increases from top to bottom, when the rotation speed of the inner protective cylinder 2 is the same, the air-cutting blade 3 closest to the bottom wall of the inner protective cylinder 2 will cut more gas in the inner protective cylinder 2 into the outer air guide cylinder 4. In other words, the air pressure at the bottom of the inner cavity of the inner protective cylinder 2 is higher than the air pressure at the top of the inner protective cylinder 2. Therefore, the flow direction of the gas in the inner protective cylinder 2 can be effectively controlled, and the possibility of harmful gases escaping from the inner protective cylinder 2 to the outside through the top opening is reduced by the negative pressure principle.

[0064] Reference Figure 4 Furthermore, the air cutter 3 is tilted so that the plane on which the air cutter 3 is located is not parallel to the vertical plane on which the central axis of the protective inner cylinder 2 is located. After the air cutter 3 rotates with the protective inner cylinder 2, it can produce an effect similar to a fan blade, further enhancing the gas flow in the protective inner cylinder 2.

[0065] Reference Figure 4 Furthermore, a scraper blade 6 is slidably connected to the outer wall of the protective inner cylinder 2. Multiple springs are embedded in the protective inner cylinder 2, and one end of the scraper blade 6 extends into the groove of the protective inner cylinder 2 and is connected to the spring. The sliding direction of the scraper blade 6 is set along the radial direction of the protective inner cylinder 2. The shape of the end of the scraper blade 6 near the inner wall of the air guide outer cylinder 4 is adapted to the shape of the inner wall of the air guide outer cylinder 4. That is, after the scraper blade 6 slides, it can be in contact with the inner wall of the air guide outer cylinder 4 to achieve relative sliding. By controlling the rotation speed of the protective inner cylinder 2, the scraper blade 6 can be made to contact or separate from the inner wall of the air guide outer cylinder 4, thereby scraping off the saw blade substrate material that has cooled and adhered to the inner wall of the air guide outer cylinder 4.

[0066] Reference Figure 4 Specifically, the scraper blades 6 are spirally distributed around the central axis of the protective inner cylinder 2. When the protective inner cylinder 2 rotates relative to the outer air guide cylinder 4, the scraper blades 6 cause the gas in the outer air guide cylinder 4 to move towards the exhaust gas treatment unit 5. That is, the tilt direction of the air cutter 3 is consistent with the tilt direction of the scraper blades 6. The spiral scraper blades 6 can cause the gas in the gap between the protective inner cylinder 2 and the outer air guide cylinder 4 to move towards the exhaust gas treatment unit 5. Furthermore, as more slag or exhaust gas is generated by laser processing, the rotation speed of the protective inner cylinder 2 is increased accordingly. At this time, the gap between the scraper blades 6 and the inner wall of the outer air guide cylinder 4 is smaller, which is equivalent to increasing the effective area of ​​the scraper blades 6, thereby generating a stronger gas pushing force and increasing the flow speed of the exhaust gas.

[0067] Reference Figure 4 and Figure 5The outer air guide cylinder 4 is rotatably connected to the frame 1, and the bottom wall of the outer air guide cylinder 4 is connected to the exhaust gas treatment unit 5 through a rotating sealed bearing. When the rotation speed of the inner protective cylinder 2 increases, causing the scraper blade 6 to come into contact with the inner wall of the outer air guide cylinder 4 to scrape off the adhering saw blade substrate material, the service life of the scraper blade 6 can be extended by reducing the relative speed difference between the inner protective cylinder 2 and the outer air guide cylinder 4.

[0068] Reference Figure 5 and Figure 6 Specifically, the exhaust gas treatment unit 5 includes a liquid storage ring 51, a filter body 52, and an exhaust gas collection pipe 53. The liquid storage ring 51 is slidably connected to the outer air guide cylinder 4 and slides along the axial direction of the outer air guide cylinder 4. A liquid cavity for storing absorbent is formed inside the liquid storage ring 51. The type of absorbent is selected according to the harmful substances generated during the processing of the product to be processed by laser processing. The filter body 52 is bolted to the liquid storage ring 51. The filter body 52 is filled with material for absorbing harmful exhaust gases, and the periphery of the filter body 52 extends into the liquid cavity. The thickness of the filter body 52 gradually increases from the middle to the periphery. The filter body 52 and the liquid storage ring 51 cooperate to divide the inner cavity of the outer air guide cylinder 4 into two chambers. One end of the exhaust gas collection pipe 53 is connected to the lower end of the outer air guide cylinder 4 through a rotating sealed bearing.

[0069] Reference Figure 5 and Figure 6 Furthermore, since some molten slag enters the inner cavity of the outer air guide cylinder 4 through the air outlet 22 and is eventually intercepted by the filter body 52 and the liquid storage ring 51, multiple slag inlet holes 511 are provided on the liquid storage ring 51. The slag inlet holes 511 are located above the filter body 52. ​​A drain hole is formed on the liquid storage ring 51, and a rubber plug is used to seal the drain hole. A drain groove is provided on the outer air guide cylinder 4. After the liquid storage ring 51 moves, the position of the drain hole can correspond to the position of the drain groove. The rubber plug can be opened through the drain groove to discharge the absorbent and waste slag in the liquid storage cavity. The scraper blade 6 is driven by the saw blade substrate material adhered to it. During the rotation of the outer duct 4, the liquid storage ring 51 and the filter body 52 will rotate accordingly. At this time, the harmful substances adsorbed in the filter body 52 will move towards one end of the liquid storage ring 51 under the action of centrifugal force, and finally enter the inner cavity of the liquid storage ring 51 and fuse with the absorbent in the inner cavity of the liquid storage ring 51. Since the rotation of the liquid storage ring 51 is intermittent, when the liquid storage ring 51 changes from a stationary state to a rotating state, the absorbent in the liquid storage ring 51 will fluctuate accordingly, and the waste residue in the absorbent will also stir the absorbent, so that the absorbent can better fuse with the harmful substances thrown out by centrifugal force.

[0070] Reference Figure 4 and Figure 5Furthermore, multiple wiping rods 7 are slidably connected to the inner protective cylinder 2. The number of wiping rods 7 is the same as the number of air cutters 3. One end of the wiping rod 7 extends into the inner cavity of the inner protective cylinder 2 and forms a wiping area. The wiping area can be slidably connected to the side wall of the air cutter 3. One end of the wiping rod 7 slides against the filter body 52. ​​Multiple springs are welded between the liquid storage ring 51 and the outer air guide cylinder 4. The springs are used to make the distance between the liquid storage ring 51 and the inner protective cylinder 2 tend to decrease. In this application, the springs can be located above or below the liquid storage ring 51. In this embodiment, the springs are located below the liquid storage ring 51.

[0071] Reference Figure 7 Specifically, the wiping rod 7 includes an abutting ball part 71, a round rod sliding part 72, and a flat wiping part 73. The abutting ball part 71 slides against the filter body 52. ​​One end of the round rod sliding part 72 is welded and fixed to the abutting ball part 71, and the round rod sliding part 72 passes through and slides and connects with the protective inner cylinder 2. One end of the flat wiping part 73 is welded and fixed to the round rod sliding part 72, and the flat wiping part 73 is located in the inner cavity of the protective inner cylinder 2. The flat wiping part 73 has multiple through grooves to form multiple wiping areas. The wiping rod 7 is distributed in sections, which can achieve the scraping of the saw blade substrate attached to the side wall of the cutting blade 3 with the reduction of the overall sliding distance of the wiping rod 7. The width of the flat wiping part 73 is greater than the minimum width of the cutting blade 3. Furthermore, when the rotation speed of the protective inner cylinder 2 is high, the flat wiping part 73 is set close to the bottom of the protective inner cylinder 2. At this time, the pressure difference between the bottom and top of the protective inner cylinder 2 is large, which is more conducive to enhancing the flow of gas in the protective inner cylinder 2.

[0072] The operational process of this application will now be described in a common application scenario. It should be noted that this common implementation scheme should not be used as the basis for determining the essential features for understanding the technical problem claimed to be solved by this application; it is merely an example.

[0073] The implementation principle of the high-precision laser cutting machine for the substrate of the noise-reducing step saw blade in this application embodiment is as follows:

[0074] The noise-reducing step saw blade substrate to be processed is placed on the placement platform, and the shaft hole in the center of the saw blade substrate cooperates with the limiting post 21 to prevent the saw blade substrate from rotating. Then, the stroke mechanism 11 moves to control the position of the laser head 12, so that the laser head 12 moves along the preset path and processes the saw blade substrate. During the processing, the laser emitted by the laser head 12 melts the material on the saw blade substrate and vaporizes some of the material. At the same time, the air blowing structure coaxial with the laser head 12 blows out gas to disperse the melted or vaporized material. While processing, the protective inner cylinder 2 rotates. Due to the interception effect of the protective inner cylinder 2, the dispersed liquid / solid material is blown to the side wall of the protective inner cylinder 2.

[0075] Furthermore, as the inner protective cylinder 2 rotates, it drives multiple air-cutting blades 3 to rotate as well. Since the air-cutting blades 3 have an inclination angle, and the angle between the air-cutting blades 3 and the inner protective cylinder 2 is fixed, but the extension distance of the air-cutting blades 3 gradually increases from top to bottom, when the inner protective cylinder 2 rotates at the same speed, the air-cutting blades 3 near the bottom wall of the inner protective cylinder 2 will cut more gas from the inner protective cylinder 2 into the outer air-guiding cylinder 4. In other words, the air pressure at the bottom of the inner protective cylinder 2 is higher than the air pressure at the top of the inner protective cylinder 2. Therefore, it can effectively control the gas flow direction in the inner protective cylinder 2 and achieve negative pressure control. The principle reduces the possibility of harmful gases escaping from the inner protective cylinder 2 to the outside through the top opening. Therefore, under the centrifugal force applied to the liquid / solid material by the air blowing structure and the rotation of the cutting blade 3, the liquid / solid material passes through the air outlet 22 and enters the outer air guide cylinder 4, preventing the saw blade substrate material from splashing and injuring people. At the same time, the rotation of the cutting blade 3 will also cause the gas in the inner protective cylinder 2 to enter the inner cavity of the outer air guide cylinder 4. Therefore, the outside air will enter through the opening on the top wall of the inner protective cylinder 2, first completing the cutting and cooling of the saw blade substrate, and then the saw blade substrate material mixed with vaporization will enter the inner cavity of the outer air guide cylinder 4 through the air outlet 22.

[0076] At this time, the spiral-shaped scraper 6 can cause the gas in the gap between the inner protective cylinder 2 and the outer air guide cylinder 4 to move towards the exhaust gas treatment unit 5. Furthermore, as more molten slag or exhaust gas is generated by laser processing, the rotation speed of the inner protective cylinder 2 is increased accordingly. At this time, the gap between the scraper 6 and the inner wall of the outer air guide cylinder 4 becomes smaller, which is equivalent to increasing the effective area of ​​the scraper 6, thereby generating a stronger gas driving force and increasing the flow speed of the exhaust gas.

[0077] As the scraper blade 6 rotates the air guide cylinder 4 through the adhered saw blade substrate material, the liquid storage ring 51 and the filter body 52 will rotate accordingly. At this time, the harmful substances adsorbed in the filter body 52 will move towards one end of the liquid storage ring 51 under the action of centrifugal force, and finally enter the inner cavity of the liquid storage ring 51 and fuse with the absorbent in the inner cavity of the liquid storage ring 51. Since the rotation of the liquid storage ring 51 is intermittent, when the liquid storage ring 51 changes from a stationary state to a rotating state, the absorbent in the liquid storage ring 51 will fluctuate accordingly, so as to better fuse with the harmful substances thrown out by centrifugal force, and avoid the harmful waste gas generated during laser processing from escaping and polluting the environment and affecting the health of operators.

[0078] Furthermore, since some molten saw blade substrate adheres to the cutting blade 3 after cooling during use, the wiping rod 7 can be moved along the cutting blade 3 by controlling the rotation speed of the protective inner cylinder 2, thereby scraping off the saw blade substrate material attached to the cutting blade 3. By further distributing the wiping rod 7, the scraping of the saw blade substrate attached to the side wall of the cutting blade 3 can be achieved while reducing the overall sliding distance of the wiping rod 7. Moreover, when the rotation speed of the protective inner cylinder 2 is high, the flat wiping part is set close to the bottom of the protective inner cylinder 2. At this time, the pressure difference between the bottom and top of the protective inner cylinder 2 is large, which is more conducive to enhancing the flow of gas in the protective inner cylinder 2.

[0079] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0080] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision laser cutting machine for a silent stepped saw blade substrate, characterized in that, include: A frame (1) is provided, on which a stroke mechanism (11) is installed. The actuating end of the stroke mechanism (11) is connected to a laser head (12). The stroke mechanism (11) is used to make the laser head (12) move in three dimensions in space. A protective inner cylinder (2) with an opening at the top is rotatably connected to the frame (1). A vertically arranged limiting post (21) is provided inside the protective inner cylinder (2), and a placement platform is formed on the limiting post (21). Multiple air-cutting blades (3) are circumferentially distributed around the central axis of the protective inner cylinder (2), and the extension surface of the air-cutting blades (3) is tangent to a virtual circle coaxial with the central axis of the protective inner cylinder (2). Multiple rows of air outlets (22) are opened on the protective inner cylinder (2), and the multiple rows of air outlets (22) are respectively located in the acute angle area formed between the multiple air-cutting blades (3) and the protective inner cylinder (2). When the protective inner cylinder (2) rotates, the air-cutting blades (3) cause the gas in the protective inner cylinder (2) to be discharged through the air outlets (22). An air guide outer cylinder (4) with openings at both ends along the axis is rotatably connected to the frame (1). The protective inner cylinder (2) is located in the inner cavity of the air guide outer cylinder (4), and the lower end of the air guide outer cylinder (4) is connected to a waste gas treatment unit (5). The distance between the air-cutting blade (3) and the inner wall of the protective inner cylinder (2) on the side closest to the central axis of the protective inner cylinder (2) gradually increases from top to bottom; The air-cutting blade (3) is inclined so that the plane on which the air-cutting blade (3) is located is not parallel to the central axis of the protective inner cylinder (2); A scraper (6) is slidably connected to the outer wall of the protective inner cylinder (2). Multiple springs are connected between the protective inner cylinder (2) and the scraper (6). The sliding direction of the scraper (6) is set along the radial direction of the protective inner cylinder (2). The shape of the end of the scraper (6) near the inner wall of the air guide outer cylinder (4) is adapted to the shape of the inner wall of the air guide outer cylinder (4). The scraper blades (6) are spirally distributed around the central axis of the protective inner cylinder (2), and when the protective inner cylinder (2) rotates relative to the air guide outer cylinder (4), the scraper blades (6) cause the gas in the air guide outer cylinder (4) to move toward one end of the waste gas treatment unit (5).

2. The high-precision laser cutting machine for the substrate of a silent stepped saw blade according to claim 1, characterized in that, The bottom wall of the air guide outer cylinder (4) is connected to the waste gas treatment unit (5) by a rotating sealed bearing.

3. The high-precision laser cutting machine for the substrate of the noise-reducing step saw blade according to claim 2, characterized in that, The waste gas treatment unit (5) includes: Liquid storage ring (51) is slidably connected to the air guide outer cylinder (4) and slides along the axial direction of the air guide outer cylinder (4). A liquid-containing cavity for storing absorbent is formed inside the liquid storage ring (51). The filter body (52) is connected to the liquid storage ring (51), and the periphery of the filter body (52) extends into the liquid-containing cavity. The thickness of the filter body (52) gradually increases from the middle to the periphery, and the filter body (52) and the liquid storage ring (51) cooperate to divide the inner cavity of the air guide outer cylinder (4) into two chambers. The exhaust gas collection pipe (53) is connected at one end to the lower end of the air guide outer cylinder (4) via a rotating sealed bearing.

4. The high-precision laser cutting machine for the substrate of the noise-reducing step saw blade according to claim 3, characterized in that, Multiple wiping rods (7) are slidably connected to the protective inner cylinder (2). One end of the wiping rod (7) extends into the inner cavity of the protective inner cylinder (2) and forms a wiping area. The wiping area can be slidably connected to the side wall of the air cutter (3). One end of the wiping rod (7) slides against the filter body (52).

5. The high-precision laser cutting machine for the substrate of a silent stepped saw blade according to claim 4, characterized in that, The erasing rod (7) includes: The ball part (71) slides against the filter body (52); A round rod sliding part (72) is provided, one end of which is connected to the abutting ball part (71), and the round rod sliding part (72) passes through and is slidably connected to the protective inner cylinder (2); A flat erasing part (73) is provided, one end of which is connected to the round rod sliding part (72), and multiple through grooves are provided on the flat erasing part (73) to form multiple erasing areas.

6. The high-precision laser cutting machine for the substrate of a silent stepped saw blade according to claim 4, characterized in that, Multiple springs connect the liquid storage ring (51) to the air guide outer cylinder (4) to reduce the distance between the liquid storage ring (51) and the protective inner cylinder (2).

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