Rapid positioning and clamping device for blades of shutter sand tray and using method of rapid positioning and clamping device

Abstract

The invention relates to a shutter sand disc blade rapid positioning and clamping device and a using method thereof.The shutter sand disc blade rapid positioning and clamping device comprises a workbench, an auxiliary moving mechanism, a blade positioning assembly and a clamping assembly, a moving groove is formed in the middle of the workbench, a moving lead screw, a moving block and a resistance spring are arranged in the auxiliary moving mechanism, and a moving motor drives the moving lead screw to drive the moving block to slide along the positioning groove; the blade positioning assembly is divided into a movable end and a fixed end, the movable end is connected with an adjustable arc-shaped positioning block through an adjusting bolt, a positioning rod and an auxiliary spring, a groove of the movable end is matched with the shape of the outer edge of a blade, and contact damage is reduced through a buffer pad. The fixed end is provided with a grading type positioning column and a clamping assembly, the clamping base and the telescopic air cylinder are in linkage with the clamping block to press downwards, the edge of the blade is wrapped by the arc-shaped clamping end face to prevent tilting, through cooperation of automatic driving, flexible positioning and accurate clamping, rapid centering, stable fixing and efficient machining of the blade are achieved, and the clamping device is suitable for products of multiple specifications.

Description

Technical Field

[0001] The present invention specifically relates to a rapid positioning and clamping device for the blades of a venetian abrasive disc and its usage method. Background Art

[0002] A venetian abrasive disc is a grinding tool widely used in fields such as metal processing and woodworking polishing. It consists of multiple blades arranged radially. The uniform distribution and stable clamping of the blades are the keys to ensuring the grinding accuracy, efficiency, and safety.

[0003] Existing devices rely on manual adjustment of the blade angles and positions one by one, and need to be repeatedly calibrated to ensure the uniformity of the blade array. The single clamping takes up to dozens of minutes. Especially in the abrasive disc structure with multiple blades combined, the problem of low clamping efficiency is more prominent, making it difficult to meet the requirements of mass production. Manual operation is greatly affected by subjective factors, and the deviation of the blade angles easily leads to imbalance of the dynamic balance during the rotation of the abrasive disc, causing problems such as vibration, noise, and decline in grinding accuracy. Some traditional jigs use scale lines or limit slots for positioning, but lack an adaptive adjustment mechanism, and have poor compatibility with the blade size tolerances, and are prone to positioning failure due to minor size differences. In addition, the traditional clamping devices may cause damage to the blades during production and use, reducing the qualified rate of products.

[0004] Therefore, it is very necessary to invent a rapid positioning and clamping device for the blades of a venetian abrasive disc and its usage method to solve the above problems. Summary of the Invention

[0005] (I) Object of the Invention The object of the present invention is to provide a rapid positioning and clamping device for the blades of a venetian abrasive disc and its usage method to solve the above deficiencies in the technology.

[0006] (II) Technical Solution To achieve the above object, the present invention provides the following technical solution: A rapid positioning and clamping device for the blades of a venetian abrasive disc, including a workbench for processing the blades of the venetian abrasive disc. An auxiliary moving mechanism is installed in the middle of the workbench, a blade positioning component is fixed above the auxiliary moving mechanism, and a matching blade clamping component is arranged on the other side of the blade positioning component; The auxiliary moving mechanism is placed inside the workbench, and a moving groove is correspondingly arranged in the middle of the workbench; There are two groups of the blade positioning components, namely a mobile end and a fixed end. The mobile end is fixed on the top of the auxiliary moving mechanism and moves with the auxiliary moving mechanism, and the fixed end is arranged on the other side of the moving groove; The blade clamping component is fixedly arranged on the top of the fixed end of the blade positioning component.

[0007] Preferably, the auxiliary moving mechanism includes a moving screw fixed inside the moving groove, a moving block is installed on the moving screw, a threaded hole for installing the moving screw is reserved in the middle of the moving block, the blade positioning assembly is installed on the top of the moving block, and an L-shaped block extends from the top of the moving block, a groove is provided on the inner side of the L-shaped block, and multiple rollers are installed in the grooves, and positioning grooves matching the rollers are provided on both sides of the moving groove at the top of the workbench.

[0008] Preferably, resistance springs are fixed on the outside of the moving screw on both sides of the moving block, and the fixed ends of the resistance springs are arranged on both sides of the inside of the moving groove. The moving groove extends to the bottom of the workbench, and a moving motor is installed on the outside side of the moving groove. The moving motor drives the moving screw to rotate and drives the moving block to move.

[0009] Preferably, the blade positioning assembly includes two groups of positioning rods fixed to the top of the moving block, the two groups of positioning rods are symmetrically arranged, and an adjusting bolt is installed in the middle of the two groups of positioning rods, and the three are jointly installed with a positioning block, and the positioning block is respectively provided with positioning holes and adjusting screw holes corresponding to the positioning rods and the adjusting bolts. An auxiliary spring is also provided on the outside of the two groups of positioning rods, and the auxiliary spring is located between the bottom of the positioning block and the top of the moving block, and one end of the auxiliary spring is fixed to the top of the moving block.

[0010] Preferably, an adjusting knob is provided on the top of the adjusting bolt, and a limiting cap is provided on the top of the two groups of positioning rods. The sizes of the adjusting knob and the limiting cap are respectively larger than the sizes of the adjusting screw hole and the positioning hole. One side of the positioning block is set to be arc-shaped and matches the outer edge shape of the louver sand disc blades. A buffer pad is provided in the arc-shaped groove on one side of the positioning block.

[0011] Preferably, the blade positioning assembly includes a group fixed on the other side of the movable groove, including a positioning docking block, an arc-shaped groove is provided in the middle of the positioning docking block, and a positioning column is provided in the arc-shaped groove on one side of the movable groove. The positioning column is a graded column, the cross-sectional size of the upper column is smaller than that of the lower column, and the overall length of the positioning column corresponds to the overall height of the positioning docking block, and the blade clamping assembly is installed on the top of the positioning docking block.

[0012] Preferably, the blade clamping assembly includes a clamping base arranged on both sides of the positioning docking block, and two groups of telescopic rods are also provided on the top of the positioning docking block. Clamping blocks are installed on both groups of telescopic rods, and the telescopic rods are installed at the bottom of the telescopic cylinder. The clamping block moves with the telescopic rod, and one side of the clamping block extends downward and matches the clamping base.

[0013] Preferably, the side surface of the clamping end of the clamping block is arc-shaped, and the side surface part exceeds the support range of the top of the clamping base and is arranged on both sides of the positioning column. The top of the clamping base is flush with the support surface of the positioning column.

[0014] Preferably, support beams are provided on both sides of the interior of the workbench, and support feet are provided on both sides of the bottom of the workbench.

[0015] A method for using a fast positioning and clamping device for shutter sand tray blades, comprising the following steps: S1. Confirm that the support feet at the bottom of the workbench are stable and the support beam is not deformed. Start the moving motor and test whether the moving screw of the auxiliary moving mechanism is smooth. Check whether the air pressure of the telescopic cylinder of the blade clamping assembly is normal and whether the clamping block and the clamping base are accurately aligned. Turn the adjustment knob to adjust the height of the positioning block and ensure that the buffer pad is intact and the auxiliary spring is in a compressed standby state. S2. Place the blades of the shutter sand tray flat on the workbench, align their outer edges with the arc groove of the positioning docking block at the fixed end, and insert them into the graded column of the positioning column; S3. The moving motor drives the moving screw to rotate, driving the moving block to move toward the fixed end. Under the action of the auxiliary spring, the positioning block at the moving end moves closer to the other side edge of the blade as the moving block approaches, and the arc-shaped groove automatically fits the outer edge of the blade; S4. Start the telescopic cylinder, drive the telescopic rod to push the clamping block downward, and the curved end surface of the clamping block and the clamping base work together to press both sides of the blade against the top of the positioning column. Manually touch the blade to confirm that there is no shaking and that the clamping block is level with the support surface of the positioning column. S5. Start the sand disc processing equipment to grind or cut the clamped blades. The buffer pads of the positioning blocks reduce vibration interference. S6. After the processing is completed, the telescopic cylinder is retracted, the clamping block retracts, the moving motor is reversed, the moving block carries the positioning block back to the initial position, and the resistance spring assists in buffering the reset impact.

[0016] Compared with the prior art, the beneficial effects of the above technical solution of the present invention are: 1. The present invention uses a moving motor to drive the moving screw, combined with the buffering effect of the resistance spring, to achieve smooth advancement of the moving block, avoid blade deviation caused by rapid movement, and ensure positioning accuracy. The arc-shaped groove of the positioning block matches the shape of the outer edge of the blade. Combined with the adjustment bolt and auxiliary spring, the clamping height and force can be flexibly adjusted to adapt to blades of different specifications; the buffer pad reduces rigid contact and protects the integrity of the blade surface; 2. The linkage design of the moving motor and the moving lead screw in the present invention simplifies the operation process. Only by starting the motor can the movement of the positioning component be completed, reducing the complexity of manual adjustment. The telescopic cylinder drives the clamping block to press down, and through the cooperation of the arc-shaped clamping end face and the clamping base, a fast and uniform clamping action is achieved without manual fixation, greatly improving the efficiency. 3. In the present invention, the moving block slides along the positioning groove through the rollers on the L-shaped block, reducing the frictional resistance and preventing shaking during the movement to ensure the accuracy of the positioning path. The internal support beam of the workbench enhances the overall rigidity, and the bottom support feet provide a stable base to avoid displacement or deformation of the device caused by processing vibration. The auxiliary spring maintains the flexible contact between the positioning block and the blade, and the resistance spring absorbs the impact when the moving lead screw changes direction, providing double protection for the operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0018] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ; Figure 3 Partial structure schematic diagram of the blade positioning component and the auxiliary moving mechanism of the present invention; Figure 4 Schematic diagram of the disassembled structure of the blade positioning component of the present invention Figure 1 ; Figure 5 Schematic diagram of the disassembled structure of the blade positioning component of the present invention Figure 2 ; Figure 6 Schematic diagram of the disassembled structure of the blade clamping component of the present invention; Figure 7 Installation structure schematic diagram of the blade clamping component of the present invention.

[0019] Explanation of reference numerals: 1. Workbench; 101. Moving groove; 102. Positioning groove; 103. Support beam; 104. Support feet; 2. Auxiliary moving mechanism; 201. Moving lead screw; 202. Moving block; 203. Threaded hole; 204. L-shaped block; 205. Groove; 206. Roller; 207. Resistance spring; 208. Moving motor; 3. Blade positioning assembly; 301. Positioning rod; 302. Adjusting bolt; 303. Positioning block; 304. Positioning hole; 305. Adjusting threaded hole; 306. Auxiliary spring; 307. Adjusting knob; 308. Limiting cap; 309. Buffer pad; 310. Positioning docking block; 311. Arc groove; 312. Positioning column; 4. Blade clamping assembly; 401. Clamping base; 402. Telescopic rod; 403. Clamping block; 404. Telescopic cylinder. Detailed implementation mode

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0021] The present invention provides a Figures 1-7 quick positioning and clamping device for a louver sanding disc blade as shown in the figure, including a workbench 1 for processing louver sanding disc blades. An auxiliary moving mechanism 2 is installed in the middle of the workbench 1, a blade positioning assembly 3 is fixed above the auxiliary moving mechanism 2, and a matching blade clamping assembly 4 is arranged on the other side of the blade positioning assembly 3; Specifically, the auxiliary moving mechanism 2 is placed inside the workbench 1, and a moving groove 101 is correspondingly arranged in the middle of the workbench 1; Specifically, there are two groups of blade positioning assemblies 3, namely a mobile end and a fixed end. The mobile end is fixed on the top of the auxiliary moving mechanism 2 and moves with the auxiliary moving mechanism 2, and the fixed end is arranged on the other side of the moving groove 101; Specifically, the blade clamping assembly 4 is fixedly arranged on the top of the fixed end of the blade positioning assembly 3.

[0022] Referring to Figures 1-3 , the auxiliary moving mechanism 2 includes a moving lead screw 201 fixed inside the moving groove 101. A moving block 202 is installed on the moving lead screw 201. A threaded hole 203 for installing the moving lead screw 201 is left in the middle of the moving block 202. The blade positioning assembly 3 is installed on the top of the moving block 202, and an L-shaped block 204 extends from the top of the moving block 202. A plurality of rollers 206 are installed inside the groove 205 of the L-shaped block 204, and positioning grooves 102 matching the rollers 206 are arranged on both sides of the moving groove 101 at the top of the workbench 1.

[0023] Specifically, resistance springs 207 are fixed on the outside of the moving screw 201 on both sides of the moving block 202. The fixed ends of the resistance springs 207 are arranged on both sides of the inside of the moving groove 101. The moving groove 101 extends to the bottom of the workbench 1, and a moving motor 208 is installed on the outside side of the moving groove 101. The moving motor 208 drives the moving screw 201 to rotate and drives the moving block 202 to move.

[0024] In the present invention, the workbench 1 is designed to be sturdy, with a central movement slot 101 to support the auxiliary movement mechanism 2 within. This auxiliary movement mechanism includes a moving screw 201, which is driven by a moving motor 208 to rotate, thereby driving a mounted moving block 202 to slide along the movement slot. Rollers 206 within an L-shaped block 204 at the top of the moving block engage with the positioning slot 102, ensuring smooth and precise movement of the moving block.

[0025] Reference Figures 3-5 The blade positioning assembly 3 includes two groups of positioning rods 301 fixed to the top of the moving block 202. The two groups of positioning rods 301 are symmetrically arranged, and an adjusting bolt 302 is installed in the middle of the two groups of positioning rods 301. The three are jointly installed with a positioning block 303. The positioning block 303 is respectively provided with positioning holes 304 and adjusting screw holes 305 corresponding to the positioning rods 301 and the adjusting bolt 302. An auxiliary spring 306 is also provided on the outside of the two groups of positioning rods 301. The auxiliary spring 306 is located between the bottom of the positioning block 303 and the top of the moving block 202, and one end of the auxiliary spring 306 is fixed to the top of the moving block 202.

[0026] Specifically, an adjusting knob 307 is provided on the top of the adjusting bolt 302, and a limiting cap 308 is provided on the top of the two sets of positioning rods 301. The sizes of the adjusting knob 307 and the limiting cap 308 are respectively larger than the sizes of the adjusting screw hole 305 and the positioning hole 304. One side of the positioning block 303 is set to be arc-shaped and matches the outer edge shape of the louver sand disc blades. A buffer pad 309 is provided in the arc-shaped groove on one side of the positioning block 303.

[0027] Specifically, the blade positioning assembly 3 has a group fixed on the other side of the movable groove 101, including a positioning docking block 310, an arc groove 311 is provided in the middle part 0 of the positioning docking block 310, and a positioning column 312 is provided on one side of the movable groove 101 in the arc groove 311. The positioning column 312 is a graded column, and the cross-sectional size of the upper column is smaller than that of the lower column, and the overall length of the positioning column 312 corresponds to the overall height of the positioning docking block 310. The blade clamping assembly 4 is installed on the top of the positioning docking block 310.

[0028] In the present invention, the blade positioning assembly 3 is divided into a mobile end and a fixed end. The mobile end is installed on the top of the moving block 202 and can move with the mechanism, while the fixed end is fixed on the opposite side of the moving slot. The positioning assembly includes two groups of positioning rods 301 and an adjusting bolt 302 in the middle. The position of the positioning block 303 can be adjusted through the adjusting bolt to adapt to blades of different sizes. The positioning block is designed with an arc-shaped groove and a buffer pad 309 for accurately and gently positioning the blades of the louver sanding disc to prevent damage to the blades.

[0029] Referring to Figures 6-7 , the blade clamping assembly 4 includes clamping bases 401 arranged on both sides of the positioning and docking block 310. Two groups of telescopic rods 402 are also provided on the top of the positioning and docking block 310. Clamping blocks 403 are installed on both groups of telescopic rods 402, and the telescopic rods 402 are all installed at the bottom of the telescopic cylinders 404. The clamping blocks 403 move with the telescopic rods 402. One side of the clamping block 403 extends downward and matches the clamping base 401.

[0030] Specifically, the side of the clamping end of the clamping block 403 is arc-shaped, and the side part extends beyond the top support range of the clamping base 401 and is arranged on both sides of the positioning column 312. The top of the clamping base 401 is flush with the support surface of the positioning column 312.

[0031] Specifically, support beams 103 are provided on both sides inside the workbench 1, and support feet 104 are also provided on both sides at the bottom of the workbench 1.

[0032] In the present invention, the blade clamping assembly 4 is installed on the top of the positioning and docking block 310 at the fixed end and includes a clamping base 401 and a clamping block 403 driven by a telescopic rod 402. The design of the clamping block matches the shape of the blade to ensure the stable position of the blade during clamping without sliding or deformation. The telescopic cylinder 404 controls the telescopic rod to clamp or release the blade quickly and accurately.

[0033] A method for using a quick positioning and clamping device for louver sanding disc blades includes the following steps: S1. Visually check whether the rubber anti-slip pads of the four corner support feet 104 are intact. Measure the flatness of the workbench 1 with a level (the error should be ≤ 0.1 mm / m). Use a torque wrench to confirm that the tightening torque of all connection bolts of the support beam 103 reaches the standard value of 50 N·m to ensure that the workbench does not shift or vibrate during the processing, and improve the processing accuracy; Start the moving motor 208 (it is recommended to run at a low speed with 10% of the rated power first), observe the operation of the moving lead screw 201, measure that the no-load running current should be stable within the range of 1.2 ± 0.1 A, apply special lithium-based grease (model: NLGI 2) on the lead screw guide rail to prevent jamming, and ensure that the moving accuracy of the positioning block 303 reaches ± 0.02 mm; Use a pressure gauge to detect the pressure of the telescopic cylinder 404, adjust it to the working pressure range of 0.5 - 0.6 MPa, and use a feeler gauge to measure the clearance between the clamping block 403 and the clamping base 401. The parallelism should be ensured to be ≤ 0.05 mm to ensure uniform distribution of the clamping force and avoid blade deformation; Rotate the adjustment knob 307 (each rotation of 15° corresponds to a height change of 0.25 mm), check the thickness wear of the polyurethane buffer pad 309 (the minimum allowable thickness is 3 mm), measure the pre-compression of the auxiliary spring 306 (the standard is 20% of the initial length), adapt to different thickness blades (in the range of 1 - 5 mm), and provide stable buffering performance; S2. Clean the surface of the workbench 1, wipe the contact surface of the positioning and docking block 310 with a lint-free cloth dipped in alcohol, gently place the blade (standard diameter Φ200 - Φ500 mm) on the workbench, and make the clearance between the outer edge and the arc groove 311 ≤ 0.3 mm. Observe the mating situation between the center hole of the blade and the grading cylinder (usually designed as a three-stage step: Φ30 / Φ40 / Φ50 mm) to achieve rapid rough positioning (radial deviation ≤ 0.5 mm), reducing the subsequent adjustment time by about 60%; S3. Set the rotation speed of the moving motor 208 to 120 rpm (corresponding to a moving speed of 10 mm / s) through the control panel. The limit sensor is triggered during the stroke of the moving block 202 (the installation spacing accuracy is ±0.1 mm). The auxiliary spring 306 (stiffness coefficient 50 N / mm) provides an initial contact force of 20 - 30 N. The arc groove (curvature radius R = blade radius ± 0.5 mm) automatically corrects the deviation, and the final positioning accuracy can reach ±0.05 mm, which improves the efficiency by 3 times compared with the traditional manual positioning; S4. The stroke of the telescopic cylinder 404 is 50 mm, and the downward pressure speed is adjustable (recommended 20 mm / s). The arc end face of the clamping block 403 (surface hardness HRC50 - 55) forms a 30° wedge angle with the clamping base 401. The pressure sensor monitors the clamping force in real time (standard value 800 - 1000 N). The carbide support surface (roughness Ra0.8) at the top of the positioning column 312 ensures stable support. After clamping, the axial runout of the blade is ≤ 0.01 mm, meeting the requirements of precision machining; S5. Before starting the equipment, confirm: the grinding wheel linear speed is 35 - 45 m / s; the coolant flow rate is ≥ 5 L / min; the buffer pad 309 (damping coefficient 0.25) absorbs more than 80% of the vibration energy; the real-time monitoring system shows that the clamping force fluctuation should be < 5%, the machining surface roughness can reach Ra0.4, and the flatness is ≤ 0.02 mm / 100 mm; S6. Set a 0.5 s buffer time when the cylinder retracts, set the reduction ratio of the reverse rotation of the moving motor 208 to 1:3, and the resistance spring 207 (pre-pressure 15 N) effectively absorbs the reset impact energy. The in-place indicator light is triggered after the positioning block 303 returns to the origin. The entire unloading process takes < 8 s, and the equipment reset accuracy remains ±0.1 mm.

[0034] In the present invention, it should be noted that before the first use every day, it is necessary to run without load for 3 complete cycles, and after processing 50 pieces, the coaxiality of the positioning column 312 should be recalibrated (requirement: ≤ Φ0.03mm); When processing blades of different materials: Aluminum alloy: The clamping force is adjusted to 600 - 700N; Stainless steel: The clamping force is increased to 1100 - 1200N; Handling of abnormal situations: When the positioning deviation > 0.1mm occurs, the calibration procedure should be immediately executed. When the clamping force fluctuates abnormally by more than 10%, the air circuit should be stopped for inspection.

[0035] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A quick positioning and clamping device for the blades of a flap sanding disc, characterized in that: It includes a workbench (1) for processing the blades of a flap sanding disc. An auxiliary moving mechanism (2) is installed in the middle of the workbench (1). Above the auxiliary moving mechanism (2), a blade positioning assembly (3) is fixed. On the other side of the blade positioning assembly (3), a matching blade clamping assembly (4) is provided; The auxiliary moving mechanism (2) is placed inside the workbench (1), and a moving groove (101) is provided in a matching manner in the middle of the workbench (1); There are two groups of the blade positioning assemblies (3), namely a mobile end and a fixed end. The mobile end is fixed on the top of the auxiliary moving mechanism (2) and moves with the auxiliary moving mechanism (2), and the fixed end is arranged on the other side of the moving groove (101); The blade clamping assembly (4) is fixedly arranged on the top of the fixed end of the blade positioning assembly (3).

2. The quick positioning and clamping device for the shutter sanding disc blade according to claim 1, wherein: The auxiliary moving mechanism (2) includes a moving lead screw (201) fixed inside the moving groove (101). A moving block (202) is installed on the moving lead screw (201). A threaded hole (203) for installing the moving lead screw (201) is left in the middle of the moving block (202). The blade positioning assembly (3) is installed on the top of the moving block (202). And an L-shaped block (204) extends from the top of the moving block (202). A groove (205) is provided inside the L-shaped block (204). A plurality of rollers (206) are installed in the groove (205). Positioning grooves (102) matching the rollers (206) are provided on both sides of the moving groove (101) at the top of the workbench (1).

3. The quick positioning and clamping device for the blade of a louvre sanding disc according to claim 2, characterized in that: On both sides of the moving block (202) outside the moving lead screw (201), a resistance spring (207) is also fixed. The fixed ends of the resistance springs (207) are arranged on both sides inside the moving groove (101). The moving groove (101) extends to the bottom of the workbench (1). And a moving motor (208) is installed on one side outside the moving groove (101). The moving motor (208) drives the moving lead screw (201) to rotate and drives the moving block (202) to move.

4. A quick positioning and clamping device for a louver sanding disc blade according to claim 2, characterized in that: The blade positioning assembly (3) includes a group of two positioning rods (301) fixed on the top of the moving block (202). The two positioning rods (301) are symmetrically arranged. An adjusting bolt (302) is installed between the two positioning rods (301). A positioning block (303) is installed together with them. Positioning holes (304) corresponding to the positioning rods (301) and an adjusting threaded hole (305) corresponding to the adjusting bolt (302) are respectively provided on the positioning block (303). An auxiliary spring (306) is also provided outside the two positioning rods (301). The auxiliary spring (306) is located between the bottom of the positioning block (303) and the top of the moving block (202), and one end of the auxiliary spring (306) is fixed on the top of the moving block (202).

5. A quick positioning and clamping device for a louver sanding disc blade according to claim 4, characterized in that: An adjusting knob (307) is provided on the top of the adjusting bolt (302), and a limiting cap (308) is provided on the top of the two sets of positioning rods (301). The sizes of the adjusting knob (307) and the limiting cap (308) are respectively larger than the sizes of the adjusting screw hole (305) and the positioning hole (304). One side of the positioning block (303) is set to be arc-shaped and matches the outer edge shape of the shutter sand disc blade. A buffer pad (309) is provided in the arc-shaped groove on one side of the positioning block (303).

6. The quick positioning and clamping device for the louvre sanding disc blades according to claim 1, wherein: The blade positioning assembly (3) includes a group of components fixed to the other side of the movable groove (101), including a positioning docking block (310), an arc-shaped groove (311) is provided in the middle of the positioning docking block (310), and a positioning column (312) is provided in the arc-shaped groove (311) on one side of the movable groove (101). The positioning column (312) is a graded column, the cross-sectional size of the upper column is smaller than that of the lower column, and the overall length of the positioning column (312) corresponds to the overall height of the positioning docking block (310). The blade clamping assembly (4) is installed on the top of the positioning docking block (310).

7. A quick positioning and clamping device for a louver sanding disc blade according to claim 6, characterized in that: The blade clamping assembly (4) includes a clamping base (401) arranged on both sides of the positioning docking block (310), and two groups of telescopic rods (402) are also provided on the top of the positioning docking block (310). The two groups of telescopic rods (402) are both installed with a clamping block (403), and the telescopic rods (402) are both installed at the bottom of the telescopic cylinder (404). The clamping block (403) moves with the telescopic rod (402), and one side of the clamping block (403) extends downward and matches the clamping base (401).

8. A quick positioning and clamping device for the blade of a louver sanding disc according to claim 7, characterized in that: The side surface of the clamping end of the clamping block (403) is arc-shaped, and the side surface part exceeds the top support range of the clamping base (401), and is arranged on both sides of the positioning column (312), and the top of the clamping base (401) is flush with the support surface of the positioning column (312).

9. A quick positioning and clamping device for the blade of a venetian abrasive disc according to claim 1, characterized in that: Support beams (103) are provided on both sides of the interior of the workbench (1), and support feet (104) are also provided on both sides of the bottom of the workbench (1).

10. A method for using a rapid positioning and clamping device for a louver sanding disc blade according to any one of claims 1-9, characterized in that: The following steps are involved: S1. Confirm that the bottom support feet (104) of the workbench (1) are stable and the support beam (103) is not deformed, start the moving motor (208), test whether the moving screw (201) of the auxiliary moving mechanism (2) is smooth, check whether the air pressure of the telescopic cylinder (404) of the blade clamping assembly (4) is normal, whether the alignment of the clamping block (403) and the clamping base (401) is accurate, rotate the adjustment knob (307) to adjust the height of the positioning block (303), ensure that the buffer pad (309) is intact, and the auxiliary spring (306) is in a compressed standby state; S2. Place the blades of the shutter sand disc flat on the workbench (1), align their outer edges with the arc groove (311) of the positioning docking block (310) at the fixed end, and insert them into the graded column of the positioning column (312); S3. Drive the moving lead screw (201) to rotate through the moving motor (208), drive the moving block (202) to move towards the fixed end. Under the action of the auxiliary spring (306), the positioning block (303) at the mobile end moves close to the other edge of the blade along with the moving block (202), and the arc-shaped groove automatically fits the outer edge of the blade. S4. Start the telescopic cylinder (404), drive the telescopic rod (402) to drive the clamping block (403) to press down. The arc-shaped end face of the clamping block (403) and the clamping base (401) cooperate to press both sides of the blade against the top of the positioning column (312). Manually touch the blade gently to confirm that there is no shaking and the supporting surface of the clamping block (403) is flush with the positioning column (312). S5. Start the sanding disc processing equipment to grind or cut the clamped blade. The buffer pad (309) of the positioning block (303) reduces vibration interference. S6. After the processing is completed, retract the telescopic cylinder (404), the clamping block (403) retracts. Reverse the moving motor (208), and the moving block (202) carries the positioning block (303) back to the initial position. The resistance spring (207) assists in buffering and resetting the impact.

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