Thin workpiece inner hole stacking precision grinding device and using method thereof

Abstract

The invention discloses a thin workpiece inner hole stacking precision grinding device and a using method thereof, and relates to the technical field of inner hole grinding devices.The thin workpiece inner hole stacking precision grinding device comprises a grinding machine tool, a fixing assembly is slidably mounted in the grinding machine tool, and a plurality of thin workpiece pieces are mounted in the fixing assembly in an embedded mode. According to the thin workpiece inner hole stacking precision grinding device and the using method thereof, batch grinding of a plurality of thin workpiece pieces is achieved, the grinding efficiency of the thin workpiece pieces is improved, meanwhile, the thin workpiece pieces can be matched with workpieces with different shapes and the same inner hole specification, the thin workpiece pieces support one another, the workpiece supporting stability is kept, and the grinding efficiency is improved. The machining quality of the thin workpiece piece is prevented from being influenced by deformation in the machining process of the thin workpiece piece, the interior of the thin workpiece piece is always kept in a clean state in the inner hole grinding process of the thin workpiece piece, chippings are prevented from being attached to the interior of the hole wall of the thin workpiece piece, the grinding precision of the grinding head is prevented from being influenced, and meanwhile the working environment is kept clean and tidy.

Description

Technical Field

[0001] The present invention relates to the technical field of inner hole grinding devices, and in particular to a stacked precision grinding device for the inner hole of a thin workpiece and a use method thereof. Background Art

[0002] In modern mechanical manufacturing, thin workpieces are increasingly used in a wide range of industries, including aerospace, automotive, and precision instruments, due to their significant advantages, such as light weight, material savings, and compact structure. However, machining thin workpieces has always been a challenging task within the industry, especially when grinding internal holes, which places stringent demands on both process and equipment.

[0003] When the existing thin workpiece inner hole grinding device is faced with the inner hole grinding of thin workpieces, the thin workpiece has poor rigidity due to its thin wall characteristics during the processing, and is very easy to deform when subjected to external force. There are problems such as unstable workpiece clamping, easy deformation, and difficulty in ensuring processing accuracy. In addition, when grinding the inner hole of a thin workpiece, a single-piece inner hole grinding method is generally adopted, and the single-piece processing efficiency is low. In order to solve the shortcomings of the existing technology, we propose a thin workpiece inner hole stacked precision grinding device and its use method. Summary of the Invention

[0004] The main purpose of the present invention is to provide a stacked precision grinding device for inner holes of thin workpieces and a method of using the same, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A stacked precision grinding device for inner holes of thin workpieces, comprising a grinding machine, a fixed assembly slidably mounted inside the grinding machine, and a plurality of thin workpiece slices embedded and mounted inside the fixed assembly; The cam is fixedly mounted on the support frame, and the two ends of the cam are fixedly mounted on the support frame, and the two ends of the cam are fixedly mounted on the support frame. The cam is fixedly mounted on the support frame at the upper and lower ends of the support frame, and the middle part of the upper and lower ends of the cam are fixedly mounted on the support frame, and the output ends of the upper and lower ends of the cam are fixedly mounted on a pressing plate. The two ends of the pressing plate are fixedly mounted on a movable rod, and the movable rod is movably sleeved on the interior of the fixed sleeve. The pressing plate is provided with a mounting groove inside the pressing plate, and a positioning sleeve is embedded in the interior of the mounting groove. The two ends of the positioning sleeve are fixedly mounted on the mounting plate, and the mounting plate is detachably mounted on the interior of the mounting groove by bolts. The pushing cylinder is fixedly mounted on the left side of the fixed box, and a fixing sleeve is fixedly installed on the interior of the fixed box. The output end of the pushing cylinder is fixedly mounted on the

[0006] Preferably, there are multiple positioning sleeves, and the apertures of the positioning holes inside the multiple positioning sleeves are different.

[0007] Preferably, the grinding machine includes a supporting base plate, a fixed plate is fixedly installed on the top of the left side of the supporting base plate, a sliding cylinder is fixedly installed on the left side of the fixed plate, a fixed rail is fixedly installed on the top of the supporting base plate, a sliding seat is fixedly installed on the output end of the sliding cylinder, the sliding seat is slidably installed on the top of the fixed rail, a grinding motor is fixedly installed on the right side of the top of the supporting base plate, a grinding head is fixedly installed on the output end of the grinding motor, the grinding head is rotatably installed on the right side of the supporting base plate, and the top of the sliding seat is fixedly connected to the fixed box.

[0008] Preferably, the support assembly includes a connecting block, which is fixedly connected to the output end of the pushing cylinder, an inner support tube is fixedly installed on the right side of the connecting block, an expansion motor is fixedly installed on the left end inside the inner support tube, a rotating shaft is fixedly installed on the output end of the expansion motor, and the rotating shaft is rotatably installed inside the inner support tube, and movable cavities are opened inside both ends of the inner support tube.

[0009] Preferably, a cross track is fixedly installed on the inner wall of the movable cavity, and an expansion frame is slidably installed on the outer surfaces of the four ends of the cross track, and a rotating disk is fixedly sleeved on both ends of the rotating shaft, and the rotating disks at both ends are rotatably installed inside the movable cavities at both ends, and an arc rod is rotatably installed on the four ends of the rotating disk, and one end of the arc rod is rotatably installed on the side of the expansion frame, and movable grooves are provided on the four sides of the inner support tube, and the expansion frame is movably sleeved inside the movable grooves, and an inner support shaft is rotatably installed between the expansion frames at both ends, and the inner support shaft is movably sleeved inside the movable grooves.

[0010] Preferably, the four inner support shafts are movably sleeved inside the positioning holes and the plurality of thin workpiece sheets.

[0011] Preferably, the plurality of thin workpiece sheets are workpieces with the same or different inner hole specifications and are stacked together one by one. The plurality of thin workpiece sheets are movably sleeved on the outer surface of the support assembly through the same inner hole.

[0012] Preferably, the fixed box includes a dust box, and a side panel is fixedly installed on the side of the dust box, and air outlet slots are provided at the upper and lower ends of the side panel. Partition plates are fixedly installed at the upper and lower ends of the left side of the interior of the dust box, and the partition plates are respectively located at the upper and lower ends of the fixed sleeve, and form a connected cavity at the upper and lower ends of the interior of the dust box.

[0013] Preferably, filters and blowers are fixedly installed inside the cavities at the upper and lower ends of the dust collecting box, and the blower is fixedly installed between the air outlet slot and the filter.

[0014] A method for using a stacked precision grinding device for inner holes of thin workpieces, comprising the following steps: S1: Control the extension of the moving cylinders at the upper and lower ends of the fixed box to move the pressing plate to the right, and start the pushing cylinder to move the support assembly out of the fixed sleeve. The support assembly moves to the outside of the fixed box, and the inner holes of multiple thin workpieces are sleeved on the outer surface of the support assembly one by one. According to the hole diameter of the thin workpiece, the positioning sleeves with corresponding positioning holes are selected, and the mounting plate is installed inside the mounting groove with bolts; S2: The unfolding motor controls the rotation of the rotating shaft to rotate the rotating disk and push the arc-shaped rods at the four ends of the rotating disk to move. The arc-shaped rods push the four unfolding racks to unfold outward along the outer surface of the cross track inside the movable cavity. The unfolding rack pushes the inner support shaft out of the inside of the movable groove. The four inner support shafts unfold to support the inner holes of multiple thin workpiece slices. The moving cylinder contracts to make the positioning holes slide along the support assembly. The pressing plate presses the multiple thin workpiece slices against the side of the fixed box so that the multiple thin workpiece slices are stacked together. The inner holes of the multiple thin workpiece slices and the positioning holes are kept on the same axis. S3: Control the cylinder to retract, so that the support assembly moves to the inside of the fixed sleeve. At this time, the inner holes of the plurality of thin workpieces are connected to the inside of the fixed box; S4: The sliding cylinder extends, causing the sliding seat to move on the outer surface of the fixed rail toward the grinding head, causing the grinding head to move through the positioning hole to the inside of the inner holes of the multiple thin workpieces. The grinding motor controls the grinding head to rotate inside the inner holes of the thin workpieces to grind the inner holes of the thin workpieces. S5: The blower works to allow external air to pass through the inner holes of the multiple thin workpiece sheets and enter the interior of the dust collection box. During the process of the grinding head grinding the inner holes of the multiple thin workpiece sheets, the dust generated by grinding enters the interior of the dust collection box from the inner holes of the thin workpiece sheets through the air flow, and enters the interior of the filter screen with the flow of the air flow, is intercepted by the filter screen, filters the air, and is discharged through the air outlet slot.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the inner holes of multiple thin workpiece sheets are positioned by providing a support assembly, so that the inner holes of the multiple thin workpiece sheets and the support assembly are kept on the same axis, so that the grinding head can grind the inner holes of multiple thin workpiece sheets at the same time, realizing batch grinding of multiple thin workpiece sheets, improving the grinding efficiency of thin workpiece sheets, and at the same time, it can adapt to workpieces with the same inner hole specifications of different shapes, thereby improving the flexibility of the grinding device.

[0016] 2. In the present invention, by setting a support assembly and a pressing plate, the pressing plate presses the multiple thin workpiece sheets on the outer surface of the support assembly against the side of the fixed box, so that the multiple thin workpiece sheets are stacked between the fixed box and the pressing plate. The multiple thin workpiece sheets form a workpiece rigid body, and the multiple thin workpiece sheets support each other to maintain the stability of the workpiece support, avoid deformation of the thin workpiece sheets during processing, and thus affect the quality of the thin workpiece processing.

[0017] 3. In the present invention, by setting the inner support shaft, when the unfolding motor controls the rotation of the rotating shaft, the unfolding frame pushes the inner support shaft out from the inside of the movable groove, so that the four inner support shafts support the thin workpiece sheet with a larger diameter inner hole, so that the support component can adapt to multiple thin workpiece sheets with different diameters, thereby improving the flexibility and adaptability of the device.

[0018] 4. In the present invention, by arranging a filter and a blower, the dust generated by grinding inside the thin workpiece sheet enters the interior of the dust collecting box cavity along with the air flow, and the dust is intercepted by the filter, so that during the process of grinding the inner hole of the thin workpiece sheet, the interior is always kept clean, avoiding debris adhering to the inside of the hole wall of the thin workpiece sheet and affecting the grinding accuracy of the grinding head, and at the same time, keeping the working environment clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the fixing assembly of the present invention; Figure 3 It is a schematic diagram of the internal structure of the fixing assembly of the present invention; Figure 4 It is a schematic structural diagram of a grinding machine tool of the present invention; Figure 5 It is a schematic structural diagram of the support assembly of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the support assembly of the present invention; Figure 7 It is a structural schematic diagram of the fixed box of the present invention.

[0020] In the figure: 1. Grinding machine; 2. Fixing assembly; 3. Thin workpiece; 4. Support assembly; 11. Support base; 12. Fixing plate; 13. Sliding cylinder; 14. Sliding seat; 15. Fixed rail; 16. Grinding motor; 17. Grinding head; 21. Fixing box; 22. Fixing frame; 23. Moving cylinder; 24. Fixing sleeve; 25. Pushing cylinder; 26. Pressing plate; 27. Movable rod; 28. Mounting slot; 29. Positioning sleeve; 210. Mounting plate; 211, positioning hole; 212, fixing sleeve; 41, connecting block; 42, inner support tube; 43, unfolding motor; 44, rotating shaft; 45, movable chamber; 46, cross track; 47, rotating disk; 48, arc rod; 49, unfolding frame; 410, inner support shaft; 411, movable slot; 2101, dust box; 2102, side panel; 2103, air outlet slot; 2104, partition plate; 2105, filter; 2106, blower. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Example 1, as Figures 1-4 As shown, a stacked precision grinding device for inner holes of thin workpieces includes a grinding machine 1 and a fixed assembly 2. The fixed assembly 2 is slidably mounted inside the grinding machine 1. A plurality of thin workpiece slices 3 are embedded and mounted inside the fixed assembly 2. like Figure 2-Figure 3As shown, the fixing assembly 2 includes a fixing box 21, a supporting assembly 4 and a pressing plate 26. The upper and lower ends of the fixing box 21 are fixedly installed with a fixing frame 22, and the two ends inside the fixing frame 22 are fixedly installed with a fixing sleeve 24. The middle part of the upper and lower fixing frames 22 is fixedly installed with a moving cylinder 23. The output ends of the upper and lower moving cylinders 23 are fixedly installed with the pressing plate 26. Both ends of the pressing plate 26 are fixedly installed with a movable rod 27. The movable rod 27 is movably sleeved in the interior of the fixed sleeve 24. The interior of the pressing plate 26 is provided with a mounting groove 28, and the interior of the mounting groove 28 is embedded with a positioning sleeve 2 9. Both ends of the positioning sleeve 29 are fixedly installed with mounting plates 210, and the mounting plates 210 are detachably installed inside the mounting groove 28 by bolts. The pushing cylinder 25 is fixedly installed on the left side of the fixed box 21, and the fixed sleeve 212 is fixedly installed inside the fixed box 21. The output end of the pushing cylinder 25 is fixedly installed with the support component 4, and the support component 4 is movably sleeved inside the fixed sleeve 212. A positioning hole 211 is opened inside the positioning sleeve 29, and the support component 4 is movably sleeved inside the fixed box 21 and the positioning hole 211. A plurality of thin workpiece sheets 3 are movably sleeved on the outer surface of the support component 4.

[0023] By setting a support component 4, the diameter of the support component 4 corresponds to the inner hole diameter of the thin workpiece sheet 3, and the inner holes of multiple thin workpiece sheets 3 are positioned so that the inner holes of multiple thin workpiece sheets 3 and the support component 4 are maintained on the same axial line, so that the grinding head 17 can grind the inner holes of multiple thin workpiece sheets 3 at the same time, thereby realizing batch grinding of multiple thin workpiece sheets 3 and improving the grinding efficiency of the thin workpiece sheets 3.

[0024] The plurality of thin workpiece sheets 3 are workpieces with the same or different inner hole specifications and are stacked together one by one. The plurality of thin workpiece sheets 3 are movably sleeved on the outer surface of the support assembly 4 through the same inner hole.

[0025] The multiple thin workpiece sheets 3 can be multiple workpieces with the same shape or multiple workpieces with different shapes. It only needs to ensure that the inner holes of the multiple thin workpiece sheets 3 are workpieces of the same specification. They can all be supported by the support component 4 to improve the flexibility of the grinding device.

[0026] In addition, the moving cylinders 23 at the upper and lower ends of the fixed box 21 contract, causing the pressing plate 26 to press the multiple thin workpiece sheets 3 on the outer surface of the support assembly 4 against the side of the fixed box 21, so that the multiple thin workpiece sheets 3 are stacked between the fixed box 21 and the pressing plate 26. The multiple thin workpiece sheets 3 form a workpiece rigid body, and the multiple thin workpiece sheets 3 support each other to maintain the stability of the workpiece support, thereby avoiding deformation of the thin workpiece sheets 3 during processing, thereby affecting the processing quality of the thin workpiece sheets 3.

[0027] like Figure 4As shown, the grinding machine 1 includes a supporting base plate 11, a fixed plate 12 is fixedly installed on the top of the left side of the supporting base plate 11, a sliding cylinder 13 is fixedly installed on the left side of the fixed plate 12, a fixed rail 15 is fixedly installed on the top of the supporting base plate 11, a sliding seat 14 is fixedly installed on the output end of the sliding cylinder 13, and the sliding seat 14 is slidably installed on the top of the fixed rail 15, a grinding motor 16 is fixedly installed on the right side of the top of the supporting base plate 11, a grinding head 17 is fixedly installed on the output end of the grinding motor 16, and the grinding head 17 is rotatably installed on the right side of the supporting base plate 11, and the top of the sliding seat 14 is fixedly connected to the fixed box 21.

[0028] Compared with the first embodiment, the second embodiment, as Figures 1-6 As shown, a stacked precision grinding device for the inner hole of a thin workpiece, the support assembly 4 includes a connecting block 41, an inner support tube 42 and an inner support shaft 410, the connecting block 41 is fixedly connected to the output end of the push cylinder 25, the right side of the connecting block 41 is fixedly installed with the inner support tube 42, the left end of the inner support tube 42 is fixedly installed with an expansion motor 43, the output end of the expansion motor 43 is fixedly installed with a rotating shaft 44, the rotating shaft 44 is rotatably installed in the inner support tube 42, and movable cavities 45 are provided in the interior of both ends of the inner support tube 42.

[0029] Among them, a cross track 46 is fixedly installed on the inner wall of the movable cavity 45, and an expansion frame 49 is slidably installed on the outer surfaces of the four ends of the cross track 46. A rotating disk 47 is fixedly sleeved on both ends of the rotating shaft 44, and the rotating disks 47 at both ends are rotatably installed inside the movable cavities 45 at both ends. An arc rod 48 is rotatably installed on the four ends of the rotating disk 47, and one end of the arc rod 48 is rotatably installed on the side of the expansion frame 49. Movable grooves 411 are provided on the four sides of the inner support tube 42, and the expansion frame 49 is movably sleeved inside the movable groove 411. The inner support shaft 410 is rotatably installed between the expansion frames 49 at both ends, and the inner support shaft 410 is movably sleeved inside the movable groove 411.

[0030] By setting the inner support shaft 410, when the unfolding motor 43 controls the rotation of the rotating shaft 44, the rotating disk 47 rotates along with the rotating shaft 44 and pushes the arc rods 48 at the four ends of the rotating disk 47 to move. The arc rods 48 push the four unfolding frames 49 to unfold outward along the outer surface of the cross track 46 inside the movable cavity 45. The unfolding frame 49 pushes the inner support shaft 410 out from the inside of the movable groove 411, and the four inner support shafts 410 unfold, so that the four inner support shafts 410 support the thin workpiece sheet 3 with a larger diameter inner hole, so that the support component 4 can adapt to multiple thin workpiece sheets 3 with different diameters, thereby improving the flexibility and adaptability of the device.

[0031] There are multiple positioning sleeves 29 , and the apertures of the positioning holes 211 inside the multiple positioning sleeves 29 are different. The four inner support shafts 410 are movably sleeved in the positioning holes 211 and the interior of the multiple thin workpiece pieces 3 .

[0032] According to the diameter of the inner hole of the thin workpiece sheet 3, a positioning sleeve 29 with the same aperture positioning hole 211 is selected, and the mounting plate 210 is fixed to the mounting groove 28 by bolts, so that the aperture of the positioning hole 211 is the same as the diameter of the thin workpiece sheet 3, and the other end of the support assembly 4 is positioned through the positioning hole 211 to maintain the stability of multiple thin workpiece sheets 3.

[0033] Compared with the first embodiment, the third embodiment, as Figure 1 , Figure 4 and Figure 7 As shown, a stacked precision grinding device for the inner holes of thin workpieces, the fixed box 21 includes a dust box 2101, a filter 2105 and a blower 2106, the side of the dust box 2101 is fixedly installed with a side panel 2102, the upper and lower ends of the side panel 2102 are provided with air outlet slots 2103, the upper and lower ends of the left side of the dust box 2101 are fixedly installed with partition plates 2104, the partition plates 2104 are respectively located at the upper and lower ends of the fixed sleeve 212, and the upper and lower ends of the dust box 2101 are formed with a connected cavity.

[0034] The filter 2105 and the blower 2106 are respectively fixedly installed inside the cavity at the upper and lower ends of the dust box 2101 , and the blower 2106 is fixedly installed between the air outlet slot 2103 and the filter 2105 .

[0035] When the cylinder 25 is pushed to control the support assembly 4 to move to the inside of the fixed sleeve 212, the apertures of multiple thin workpiece sheets 3 are connected to the cavity inside the dust box 2101. Through the operation of the air blower 2106, the dust ground inside the thin workpiece sheet 3 enters the inside of the dust box 2101 cavity with the air flow, and is intercepted by the filter 2105, so that during the grinding of the inner hole of the thin workpiece sheet 3, the inside is always kept clean, avoiding debris adhering to the inside of the hole wall of the thin workpiece sheet 3, affecting the grinding accuracy of the grinding head 17, and at the same time, keeping the working environment clean.

[0036] Example 4, a method for using a stacked precision grinding device for inner holes of thin workpieces, comprising the following steps: S1: Control the moving cylinders 23 at the upper and lower ends of the fixed box 21 to extend, so that the pressing plate 26 moves to the right, and start the pushing cylinder 25 to move the support assembly 4 out of the fixed sleeve 212. The support assembly 4 moves to the outside of the fixed box 21, and the inner holes of the multiple thin workpiece pieces 3 are sleeved on the outer surface of the support assembly 4 one by one. According to the hole diameter of the thin workpiece piece 3, the positioning sleeve 29 with the corresponding specification of the positioning hole 211 is selected, and the mounting plate 210 is installed in the mounting groove 28 by bolts; S2: The unfolding motor 43 controls the rotation of the rotating shaft 44 to rotate the rotating disk 47 and push the arc rods 48 at the four ends of the rotating disk 47 to move. The arc rods 48 push the four unfolding frames 49 to unfold outward along the outer surface of the cross track 46 inside the movable chamber 45. The unfolding frame 49 pushes the inner support shaft 410 out from the inside of the movable groove 411. The four inner support shafts 410 unfold to support the inner holes of the multiple thin workpiece slices 3. The moving cylinder 23 contracts to make the positioning hole 211 slide along the support assembly 4. The pressing plate 26 presses the multiple thin workpiece slices 3 against the side of the fixed box 21, so that the multiple thin workpiece slices 3 are stacked together, and the inner holes of the multiple thin workpiece slices 3 and the positioning holes 211 are kept on the same axis. S3: Control the pushing cylinder 25 to retract, so that the supporting assembly 4 moves to the interior of the fixed sleeve 212. At this time, the inner holes of the plurality of thin workpiece pieces 3 are connected to the interior of the fixed box 21. S4: The sliding cylinder 13 extends, causing the sliding seat 14 to move on the outer surface of the fixed rail 15 toward the grinding head 17, causing the grinding head 17 to move through the positioning hole 211 to the inside of the inner holes of the plurality of thin workpiece slices 3. The grinding motor 16 controls the grinding head 17 to rotate inside the inner holes of the thin workpiece slices 3 to grind the inner holes of the thin workpiece slices 3. S5: The blower 2106 works, allowing external air to pass through the inner holes of multiple thin workpiece sheets 3 and enter the interior of the dust box 2101. During the process of the grinding head 17 grinding the inner holes of multiple thin workpiece sheets 3, the dust generated by grinding enters the interior of the dust box 2101 from the inner holes of the thin workpiece sheets 3 through the air flow, and enters the interior of the filter 2105 with the flow of the air flow, is intercepted by the filter 2105, and the air is filtered and discharged through the air outlet slot 2103.

[0037] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A stacked precision grinding device for inner holes of thin workpieces, comprising a grinding machine (1), characterized in that: A fixed component (2) is slidably mounted inside the grinding machine (1), and a plurality of thin workpiece sheets (3) are embedded and mounted inside the fixed component (2); The fixing assembly (2) includes a fixing box (21), a fixing frame (22) is fixedly installed at both upper and lower ends of the fixing box (21), a fixing sleeve (24) is fixedly installed at both ends of the fixing frame (22), a moving cylinder (23) is fixedly installed at the middle of both upper and lower ends of the fixing frame (22), a pressing plate (26) is fixedly installed at the output end of the moving cylinder (23) at both upper and lower ends, a movable rod (27) is fixedly installed at both ends of the pressing plate (26), the movable rod (27) is movably sleeved inside the fixing sleeve (24), a mounting groove (28) is provided inside the pressing plate (26), a positioning sleeve (29) is embedded in the mounting groove (28), and the positioning sleeve (2 9) are fixedly mounted with mounting plates (210) at both ends, the mounting plates (210) are detachably mounted inside the mounting grooves (28) by bolts, a push cylinder (25) is fixedly mounted on the left side of the fixed box (21), a fixed sleeve (212) is fixedly mounted inside the fixed box (21), a support assembly (4) is fixedly mounted on the output end of the push cylinder (25), the support assembly (4) is movably sleeved inside the fixed sleeve (212), a positioning hole (211) is provided inside the positioning sleeve (29), the support assembly (4) is movably sleeved inside the fixed box (21) and the positioning hole (211), and a plurality of thin workpiece sheets (3) are movably sleeved on the outer surface of the support assembly (4).

2. The stacked precision grinding device for inner holes of thin workpieces according to claim 1, characterized in that: There are multiple positioning sleeves (29), and the apertures of the positioning holes (211) inside the multiple positioning sleeves (29) are all different.

3. The stacked precision grinding device for inner holes of thin workpieces according to claim 1, characterized in that: The grinding machine (1) comprises a supporting base plate (11), a fixed plate (12) is fixedly mounted on the top of the left side of the supporting base plate (11), a sliding cylinder (13) is fixedly mounted on the left side of the fixed plate (12), a fixed rail (15) is fixedly mounted on the top of the supporting base plate (11), a sliding seat (14) is fixedly mounted on the output end of the sliding cylinder (13), the sliding seat (14) is slidably mounted on the top of the fixed rail (15), a grinding motor (16) is fixedly mounted on the right side of the top of the supporting base plate (11), a grinding head (17) is fixedly mounted on the output end of the grinding motor (16), the grinding head (17) is rotatably mounted on the right side of the supporting base plate (11), and the top of the sliding seat (14) is fixedly connected to a fixed box (21).

4. The stacked precision grinding device for inner holes of thin workpieces according to claim 1, characterized in that: The support assembly (4) includes a connecting block (41), the connecting block (41) is fixedly connected to the output end of the pushing cylinder (25), an inner support tube (42) is fixedly installed on the right side of the connecting block (41), an expansion motor (43) is fixedly installed on the left end inside the inner support tube (42), a rotating shaft (44) is fixedly installed on the output end of the expansion motor (43), the rotating shaft (44) is rotatably installed inside the inner support tube (42), and movable cavities (45) are provided inside both ends of the inner support tube (42).

5. The stacked precision grinding device for inner holes of thin workpieces according to claim 4, characterized in that: A cross track (46) is fixedly installed on the inner wall of the movable cavity (45), and an expansion frame (49) is slidably installed on the outer surfaces of the four ends of the cross track (46). The two ends of the rotating shaft (44) are fixedly sleeved with a rotating disk (47), and the rotating disks (47) at both ends are rotatably installed inside the movable cavities (45) at both ends. The four ends of the rotating disk (47) are rotatably installed with an arc rod (48), and one end of the arc rod (48) is rotatably installed on the side of the expansion frame (49). The four sides of the inner support tube (42) are provided with a movable groove (411), and the expansion frame (49) is movably sleeved inside the movable groove (411). An inner support shaft (410) is rotatably installed between the two ends of the expansion frames (49), and the inner support shaft (410) is movably sleeved inside the movable groove (411).

6. The stacked precision grinding device for inner holes of thin workpieces according to claim 5, characterized in that: The four inner support shafts (410) are movably sleeved inside the positioning holes (211) and the plurality of thin workpiece sheets (3).

7. The stacked precision grinding device for inner holes of thin workpieces according to claim 1, characterized in that: The plurality of thin workpiece sheets (3) are workpieces of the same or different inner hole specifications and are stacked together one by one. The plurality of thin workpiece sheets (3) are movably sleeved on the outer surface of the support assembly (4) through the same inner hole.

8. The stacked precision grinding device for inner holes of thin workpieces according to claim 1, characterized in that: The fixed box (21) includes a dust box (2101), a side panel (2102) is fixedly mounted on the side of the dust box (2101), and air outlet slots (2103) are provided at the upper and lower ends of the side panel (2102). Partition panels (2104) are fixedly mounted at the upper and lower ends of the left side of the interior of the dust box (2101), and the partition panels (2104) are respectively located at the upper and lower ends of the fixed sleeve (212), and form a connected cavity at the upper and lower ends of the interior of the dust box (2101).

9. The stacked precision grinding device for inner holes of thin workpieces according to claim 8, characterized in that: A filter (2105) and a blower (2106) are fixedly installed inside the cavities at the upper and lower ends of the dust collecting box (2101), and the blower (2106) is fixedly installed between the air outlet slot (2103) and the filter (2105).

10. A method for using a stacked precision grinding device for inner holes of thin workpieces, applicable to the stacked precision grinding device for inner holes of thin workpieces according to any one of claims 1 to 9, characterized in that: The following steps are included: S1: Control the moving cylinders (23) at the upper and lower ends of the fixed box (21) to extend, so that the pressing plate (26) moves to the right, and start the pushing cylinder (25) to move the support assembly (4) out of the interior of the fixed sleeve (212), and the support assembly (4) moves to the outside of the fixed box (21), and the inner holes of the plurality of thin workpiece pieces (3) are sleeved on the outer surface of the support assembly (4) one by one, and according to the aperture of the thin workpiece piece (3), the positioning sleeve (29) of the corresponding specification positioning hole (211) is selected, and the mounting plate (210) is mounted inside the mounting groove (28) by bolts; S2: the unfolding motor (43) controls the rotating shaft (44) to rotate, so that the rotating disk (47) rotates and pushes the arc rods (48) at the four ends of the rotating disk (47) to move, and the arc rods (48) push the four unfolding racks (49) to unfold outward along the outer surface of the cross track (46) inside the movable cavity (45), and the unfolding rack (49) pushes the inner support shaft (410) out from the inside of the movable groove (411), and the four inner support shafts (410) unfold to support the inner holes of the plurality of thin workpiece sheets (3), and the moving cylinder (23) contracts to make the positioning hole (211) slide along the support assembly (4), and the pressing plate (26) presses the plurality of thin workpiece sheets (3) on the side of the fixed box (21), so that the plurality of thin workpiece sheets (3) are stacked together, and the inner holes of the plurality of thin workpiece sheets (3) and the positioning hole (211) are kept on the same axis; S3: Controlling the pushing cylinder (25) to contract, so that the supporting assembly (4) moves to the interior of the fixed sleeve (212), at which time, the inner holes of the plurality of thin workpiece sheets (3) are connected to the interior of the fixed box (21); S4: The sliding cylinder (13) extends, causing the sliding seat (14) to move on the outer surface of the fixed rail (15) toward the grinding head (17), causing the grinding head (17) to move through the positioning hole (211) toward the interior of the inner holes of the plurality of thin workpiece sheets (3), and the grinding motor (16) controls the grinding head (17) to rotate inside the inner holes of the thin workpiece sheets (3), thereby grinding the inner holes of the thin workpiece sheets (3); S5: The blower (2106) operates to allow external air to pass through the inner holes of the plurality of thin workpiece sheets (3) and enter the interior of the dust collecting box (2101). During the process of the grinding head (17) grinding the inner holes of the plurality of thin workpiece sheets (3), dust generated by grinding enters the interior of the dust collecting box (2101) through the air flow from the inner holes of the thin workpiece sheets (3). The dust enters the interior of the filter (2105) along with the flow of the air flow, is intercepted by the filter (2105), and the air is filtered and discharged through the air outlet slot (2103).

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