A quick adjustment mechanism and method for an offline thin-walled part inner hole grinding auxiliary tool

Abstract

The application discloses a kind of quick adjustment mechanism and method of offline thin-walled part inner hole grinding auxiliary tool, including the fixture base with guide key groove, the guide key groove of the fixture base is movably connected with arc calibration plate support, the fixture base is further provided with taper positioning sleeve, correction taper hole is set on taper positioning sleeve, arc calibration plate is provided with correction arc surface, further including concentric correction sample, concentric correction sample includes coaxially arranged conical body and disc body, the diameter of disc body corresponds with the diameter of correction arc surface, the diameter of correction arc surface corresponds with the diameter of the gear inner hole to be processed, the taper of correction taper hole corresponds with the taper of conical body, the taper of correction taper hole corresponds with the taper of thin-walled part inner hole grinding auxiliary tool.The application can realize the quick concentric adjustment of all positioning columns on thin-walled part inner hole grinding auxiliary tool, quick adjustment, quick change type, to improve the subsequent machining precision of thin-walled part inner hole grinding auxiliary tool.

Description

Technical Field

[0001] This invention belongs to the technical field of gear processing equipment, and specifically discloses a quick adjustment mechanism and method for grinding auxiliary tools for thin-walled parts with internal holes. Background Technology

[0002] In the context of lightweight design, crankshaft gears in automotive engines are typically designed as thin-walled parts. To meet the requirements of timing ignition, these crankshaft gears are designed with phase-determining keyways in their inner bores, which increases the machining difficulty of the reference inner bore.

[0003] Currently, there are two main industry solutions for positioning and clamping in the machining of thin-walled gears:

[0004] 1. Using the self-centering function of the chuck, the gear inner hole is positioned by the pitch circle or addendum circle of the gear teeth, and a radial clamping force is applied to clamp the thin-walled gear. However, this method will cause clamping deformation of the workpiece in the radial direction, thus affecting the accuracy of the gear inner hole.

[0005] 2. A magnetic clamp is used to hold the gear at its end face, while a four-jaw cylinder is used for automatic alignment of the gear's inner bore. However, this method is not suitable for machining gears with keyways. When machining the inner bore of a thin-walled gear with a keyway, the cam bearing follower on the clamp will get stuck in the keyway, resulting in inaccurate workpiece center positioning, large runout and dispersion of the gear ring, which cannot meet the requirements of subsequent gear grinding.

[0006] To address the aforementioned technical problems, Chinese invention patent CN115026603A proposes a grinding tool for the inner bore of thin-walled parts. This device includes a cylindrical finger cylinder containing multiple radially movable gripping fingers. Follower mounting seats are fixed to the gripping fingers, and at least one purchased cam bearing follower is mounted on each side of these mounting seats. This cam bearing follower consists of a shaft bolt, a roller, and a roller between the bolt end and the roller. Furthermore, the patent discloses a method of use: based on an automatic alignment device for the inner bore of a keyed gear, the alignment operation is achieved by magnetically attracting the keyed gear to a machine tool flange and mounting the automatic alignment device for the inner bore of the keyed gear on a tool turret.

[0007] However, this approach also has its problems: the grinding tool for thin-walled parts is fixed to the turret position inside the machine tool during use and cannot rotate around its own axis. To prevent the locating pins from falling into the keyway and causing errors, multiple rollers need to be designed to keep the locating pins concentric. However, in actual adjustment, concentric adjustment of multiple locating pins is quite difficult and time-consuming.

[0008] Therefore, it is necessary to develop a rapid adjustment mechanism for the grinding tool for the inner hole of thin-walled parts, so as to ensure that all the positioning pins on the grinding tool can be quickly and concentrically adjusted, thereby solving the existing problems of adjustment difficulty and low efficiency. Summary of the Invention

[0009] To address the technical problems existing in the prior art, the present invention provides a rapid adjustment mechanism and method for an offline thin-walled part inner hole grinding tool, which can realize rapid concentric adjustment and rapid shape change of all positioning pins on the thin-walled part inner hole grinding tool, thereby improving the subsequent processing accuracy of the thin-walled part inner hole grinding tool.

[0010] This invention discloses a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool, comprising a fixture base, an arc calibration plate support detachably connected to the fixture base, an arc calibration plate detachably connected to the arc calibration plate support, a tapered positioning sleeve rotatable about a calibration reference axis on the fixture base, a calibration tapered hole coaxially arranged with the calibration reference axis on the tapered positioning sleeve, a calibration arc surface on the arc calibration plate, and a concentric calibration sample. The concentric calibration sample comprises a conical portion coaxially arranged for insertion and mating with the calibration tapered hole, and a disc portion for mating with the calibration arc surface of the arc calibration plate to ensure that the central axis of the calibration arc surface is coaxial with the calibration reference axis. The diameter of the disc portion corresponds to the diameter of the calibration arc surface, the diameter of the calibration arc surface corresponds to the diameter of the gear inner hole to be processed, the taper of the calibration tapered hole corresponds to the taper of the conical portion, and the taper of the calibration tapered hole corresponds to the taper of the thin-walled part inner hole grinding tool.

[0011] In a preferred embodiment of the present invention, a measuring instrument frame is connected to the fixture base, and a dial indicator is arranged on the measuring instrument frame extending radially along the arc calibration plate.

[0012] In a preferred embodiment of the present invention, a clamp support sleeve is provided on the clamp base, the clamp support sleeve is provided with a stepped hole arranged coaxially with the calibration reference axis, and a rolling bearing is provided on the upper end face of the clamp support sleeve.

[0013] In a preferred embodiment of the present invention, the tapered positioning sleeve is a stepped shaft shape, and the shape of the tapered positioning sleeve corresponds to the shape of the stepped hole of the clamp support sleeve.

[0014] In a preferred embodiment of the present invention, the small-diameter end of the correction cone hole of the tapered positioning sleeve is provided with a top shaft that can be axially displaced along the correction reference axis.

[0015] In a preferred embodiment of the present invention, the fixture base is provided with a long eccentric shaft for driving the top shaft to move axially along the correction reference axis, and the top shaft is provided with an eccentric hole that mates with the long eccentric shaft.

[0016] In a preferred embodiment of the present invention, a locking shaft extending axially along the calibration reference axis and an eccentric shaft cooperating with the locking shaft are provided between the arc calibration plate support and the fixture base. The central axis of the eccentric shaft is perpendicular to the central axis of the locking shaft. The locking shaft is provided with an eccentric hole for cooperating with the eccentric shaft. The locking shaft is slidably connected to the arc calibration plate support with axial displacement along the calibration reference axis.

[0017] In a preferred embodiment of the present invention, a limiting pin is provided between the tapered positioning sleeve and the clamp support sleeve, and the central axis of the limiting pin is perpendicular to the central axis of the calibration reference shaft.

[0018] In a preferred embodiment of the present invention, the disk portion of the arc calibration plate is a disk, and the outer peripheral surface of the disk includes adjacent arc-shaped curved surfaces and rectangular planes arranged at intervals.

[0019] This invention also discloses a method for rapid adjustment of grinding tools for the inner hole of thin-walled parts offline.

[0020] S1, install the concentric calibration sample on the tapered positioning sleeve, based on the fit between the conical part of the concentric calibration sample and the calibration cone hole of the tapered positioning sleeve, (, loosen the arc calibration plate support (5), move the arc calibration plate (6) linearly along the guide keyway of the fixture base (1), the calibration arc surface of the arc calibration plate is in contact with the disc part of the concentric calibration sample (13) and is concentric, and is connected and fixed with the connecting screw (17), rotate the eccentric shaft (3) upward to lock the arc calibration plate support (5), and remove the connecting screw (17)) the disc part of the concentric calibration sample and the calibration arc surface of the arc calibration plate are fitted together to realize the coaxiality of the central axis of the arc calibration plate and the calibration reference axis;

[0021] S2, remove the concentric calibration sample from the tapered positioning sleeve, install the thin-walled part inner hole grinding tool on the tapered positioning sleeve, adjust the position of each roller positioning column assembly on the thin-walled part inner hole grinding tool in sequence, and rotate each roller positioning column assembly in stages to ensure that it is tangent to the calibration arc surface of the arc calibration plate.

[0022] The beneficial effects of this invention are as follows: This invention designs a virtual center for the arc calibration plate and adopts an adaptive method of inner and outer circle fitting to determine that the virtual circle of the arc calibration plate and the real circle of the concentric calibration sample are concentric, solving the problem of simultaneous concentricity of the circular calibration sample in both radial and tangential directions; it adopts the principle of collinearity of the inner and outer tangent circles, and adjusts through inner and outer circle fitting, which is simple and reliable; it uses a partial arc to replace the whole arc to determine the virtual center, which provides a large adjustment space and is convenient to operate; it simulates the actual working conditions of the auxiliary tool, realizing 360° rotation adjustment offline; and it designs a measuring mechanism that can detect the actual rotational accuracy of the thin-walled part inner hole grinding auxiliary tool in real time after adjustment. Attached Figure Description

[0023] Figure 1 This is a front view of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0024] Figure 2 This is a side view of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0025] Figure 3 This is a top view of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0026] Figure 4 This is a schematic diagram of the calibration position of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0027] Figure 5 This is a schematic diagram of the adjustment position of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0028] Figure 6 This is a front view of a concentric calibration sample of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0029] Figure 7 This is a top view of a concentric calibration sample of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0030] Figure 8 This is a front view of the arc calibration plate of the quick adjustment mechanism for the inner hole grinding tool of a thin-walled part according to the present invention;

[0031] Figure 9 This is a side view of the arc calibration plate of the quick adjustment mechanism for the inner hole grinding tool of a thin-walled part according to the present invention;

[0032] Figure 10 This is a top view of the arc calibration plate of the quick adjustment mechanism for the inner hole grinding tool of a thin-walled part according to the present invention;

[0033] Figure 11 This is a schematic diagram of the tapered positioning sleeve of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0034] Figure 12 This is a schematic diagram of the calibration position of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0035] Figure 13 This is a schematic diagram of the disassembly position of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0036] Figure 14 This is a schematic diagram of the adjustment position of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0037] Figure 15 This is a schematic diagram of the detection position of a quick adjustment mechanism for an offline thin-walled part inner hole grinding tool according to the present invention;

[0038] In the figure: 1-Clamp base, 2-Guide key, 3-Eccentric shaft, 4-Locking shaft, 5-Circular arc calibration plate support, 6-Circular arc calibration plate, 7-Top shaft, 8-Tapered positioning sleeve, 9-Clamp support sleeve, 10-Long eccentric shaft, 11-Operating handle, 12-Rolling bearing, 13-Concentric calibration sample, 14-Limit pin, 15-Measuring instrument holder, 16-Dial indicator. Detailed Implementation

[0039] The technical solutions (including preferred technical solutions) of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] like Figure 1-15As shown, this invention discloses a quick adjustment mechanism for an offline thin-walled part inner hole grinding fixture. It is an auxiliary fixture as described in CN115026603A, used to ensure that all positioning pins on the thin-walled part inner hole grinding fixture can be quickly and concentrically adjusted, thereby facilitating the alignment of the gear inner hole and meeting the alignment requirements for keyway gears. A circular arc calibration plate support 5 is detachably connected to the fixture base 1, and a circular arc calibration plate 6 is detachably connected to the circular arc calibration plate support 5. The fixture base 1 is also provided with a tapered positioning sleeve 8 that can rotate around a calibration reference axis. The tapered positioning sleeve 8 is provided with a calibration... The calibration tapered hole is arranged coaxially with the reference axis. The arc calibration plate 6 is provided with a calibration arc surface. It also includes a concentric calibration sample 13. The concentric calibration sample 13 includes a conical part arranged coaxially for insertion and mating with the calibration tapered hole and a disc part for mating with the calibration arc surface of the arc calibration plate 6 to ensure that the central axis of the calibration arc surface is coaxial with the calibration reference axis. The diameter of the disc part corresponds to the diameter of the calibration arc surface. The diameter of the calibration arc surface corresponds to the diameter of the inner hole of the gear to be machined. The taper of the calibration tapered hole corresponds to the taper of the conical part. The taper of the calibration tapered hole corresponds to the taper of the grinding tool for the inner hole of the thin-walled part. This invention employs an adaptive method of inner and outer circle fitting to determine the concentricity of the virtual circle of the arc calibration plate 6 and the real circle of the concentric calibration sample 13, avoiding the problem in traditional design schemes where radial and tangential concentricity are difficult to guarantee simultaneously. This invention utilizes the principle that the tangent points of the two inner circles and the centers of the two circles are collinear, weakening the influence of the symmetry of the roller assembly relative to the center of the circle. The symmetry of the roller assembly relative to the center of the circle does not affect the rotational accuracy of the grinding tool for adjusting the inner hole of the thin-walled part. This invention has the advantage of strong fault tolerance.

[0041] Preferably, the calibration cone hole is based on the Morse taper, enabling 360° rotation adjustment offline; consistent with the actual working condition.

[0042] Preferably, in this invention, the concentric calibration sample 13 with its tapered shaft is installed into the tapered hole of the mechanism's tapered positioning sleeve 8. The inner arc of the circular arc calibration plate 6 is aligned with the outer arc of the concentric calibration sample 13 and fixed with radial screws. The mounting support of the circular arc calibration plate 6 is moved to a suitable position, and the circular arc calibration plate 6 is fixed to the mounting support with set screws. At the same time, the mounting support is fixed. The radial screws are removed, and the concentric calibration sample 13 is rotated to the disassembly position, thus ejecting the concentric calibration sample 13. The zeroing work of the mechanism is completed. Further, the grinding tool for the inner hole of the thin-walled part to be adjusted is installed into the tapered hole of the mechanism's tapered positioning sleeve 8. The roller assembly is rotated sequentially to the arc surface of the circular arc calibration plate 6. By radial movement and circumferential oscillation, the two rollers of the roller assembly are adjusted so that the outer circles of the two rollers are tangentially aligned with the arc surface of the circular arc calibration plate 6. Then, the roller assembly is fixed, completing the alignment and adjustment work of the grinding tool for the inner hole of the thin-walled part.

[0043] Preferably, the inner diameter of the arc calibration plate 6 and the outer diameter of the concentric calibration sample 13 of the present invention are matched, with an absolute diameter tolerance of ±1mm and a diameter difference of Δd≤0.005, and are supplied in pairs for use; manufacturing is also relatively easy; the present invention has high adjustment accuracy; the present invention designs a concentric calibration sample 13 with a tapered reference shaft based on the inner diameter of the product and the cylinder stroke; the concentric calibration sample of the present invention is used to determine the concentricity of the center of the tapered seat and the arc calibration plate 6.

[0044] Preferably, according to the product requirements, the present invention designs a fixed diameter arc calibration plate 6, and the arc chord width meets the requirement of fully encompassing the roller assembly (2 pieces per set). The arc chord width designed in the present invention is applicable to products with an inner hole diameter range of φ135±5, and has the advantage of strong versatility.

[0045] Preferably, a measuring instrument frame 15 is connected to the fixture base 1, and a dial gauge 16 is arranged on the measuring instrument frame 15 extending radially along the arc calibration plate 6.

[0046] Preferably, a fixture support sleeve 9 is provided on the fixture base 1, and a stepped hole is provided on the fixture support sleeve 9 coaxially with the calibration reference axis. A rolling bearing 12 is provided on the upper end face of the fixture support sleeve 9.

[0047] Preferably, the tapered positioning sleeve 8 is a stepped shaft shape, and the shape of the tapered positioning sleeve 8 corresponds to the shape of the stepped hole of the clamp support sleeve 9.

[0048] Preferably, the small diameter end of the correction tapered hole of the tapered positioning sleeve 8 is provided with a top shaft 7 that can be axially displaced along the correction reference axis.

[0049] Preferably, the fixture base 1 is provided with a long eccentric shaft 10 for driving the top shaft 7 to move axially along the correction reference axis, and the top shaft 7 is provided with an eccentric hole that mates with the long eccentric shaft 10.

[0050] Preferably, a locking shaft 4 extending axially along the calibration reference axis and an eccentric shaft 3 cooperating with the locking shaft 4 are provided between the arc calibration plate support 5 and the fixture base 1. The central axis of the eccentric shaft 3 is perpendicular to the central axis of the locking shaft 4. The locking shaft 4 is provided with an eccentric hole for cooperating with the eccentric shaft 3. The locking shaft 4 is slidably connected to the arc calibration plate support 5 with axial displacement along the calibration reference axis.

[0051] Preferably, a limiting pin 14 is provided between the tapered positioning sleeve 8 and the clamp support sleeve 9, and the central axis of the limiting pin 14 is perpendicular to the central axis of the calibration reference shaft.

[0052] Preferably, the disk portion of the arc calibration plate 6 is a disk, and the outer peripheral surface of the disk includes adjacent arc-shaped curved surfaces and rectangular planes.

[0053] This invention also discloses a method for rapid adjustment of grinding tools for the inner hole of thin-walled parts offline.

[0054] S1, the concentric calibration sample 13 is installed on the tapered positioning sleeve 8. Based on the fit between the conical part of the concentric calibration sample 13 and the calibration conical hole of the tapered positioning sleeve 8, and the fit between the disc part of the concentric calibration sample 13 and the calibration arc surface of the arc calibration plate 6, the coaxiality of the central axis of the arc calibration plate 6 and the calibration reference axis is achieved.

[0055] S2, remove the concentric calibration sample 13 from the tapered positioning sleeve 8, install the thin-walled part inner hole grinding tool on the tapered positioning sleeve 8, adjust the position of each roller positioning column assembly on the thin-walled part inner hole grinding tool in sequence, and rotate each roller positioning column assembly in stages to ensure that it is tangent to the calibration arc surface of the arc calibration plate 6.

[0056] At the start of the adjustment, the arc calibration plate 3 and the arc calibration plate support 5 are in a loose state on the fixture base 1. After adjusting by moving linearly along the guide keyway, the arc calibration plate 3 and the arc surface of the concentric calibration sample 13 are tightly fitted together. Then the arc calibration plate support 5 is locked. During this process, the arc calibration plate 3 also needs to be tightened and removed with connecting screws.

[0057] Specifically, the present invention includes the following steps:

[0058] S1, insert the tapered shaft of the concentric calibration sample 13 into the tapered hole of the mechanism tapered positioning sleeve 8, fit the inner arc of the arc calibration plate 6 with the outer arc of the concentric calibration sample 13, and fix it with radial screws;

[0059] S2, move the arc calibration plate 6 to the mounting bracket to the appropriate position, and use the set screw to fix the arc calibration plate 6 on the mounting bracket. At the same time, rotate the eccentric shaft 3 to fix the mounting bracket.

[0060] S3, remove the radial screw, rotate the concentric calibration sample 13 to the disassembly position (flat square position on the circumference), turn the handle downward to drive the eccentric shaft to rotate, push out the concentric calibration sample 13, and complete the zeroing work of the adjustment mechanism;

[0061] S4. Using the Morse taper shank as a reference, insert the grinding and alignment tool for the inner hole of the thin-walled part to be adjusted into the tapered positioning sleeve 6 with the same Morse taper hole. According to the inner hole radius of the product, roughly adjust the center distance of the first set of roller positioning column assemblies (adjusted by the radial screw on the grinding and alignment tool for the inner hole of the thin-walled part). Visually inspect the radial clearance with the arc calibration plate 6, which should be around 0.5mm.

[0062] S5, loosen the set screws of the first set of roller positioning column assembly on the thin-walled part inner hole grinding alignment auxiliary tool, and with the help of the waist groove length and key fit clearance (design of this invention: radial movement 2mm, key fit clearance 0.6mm), adjust by moving and swinging to make the outer circles of the two rollers of the first set of roller positioning column assembly fit with the inner circle of the arc calibration plate 6. Then, fix the set screws to complete the centering adjustment of the first set of roller positioning column assembly.

[0063] S6, rotate the thin-walled part inner hole grinding and alignment auxiliary tool, and proceed to the second and third sets of roller positioning column assemblies in sequence; repeat the adjustment steps of the first set of roller positioning column assemblies; and the adjustment work of this set of thin-walled part inner hole grinding and alignment auxiliary tools can be completed.

[0064] S7. Adjust the dial indicator and dial stand in the measuring components to the appropriate positions, and zero the dial indicator using one of the rollers; rotate the grinding and alignment tool for the inner hole of the thin-walled part, and measure the actual eccentricity value of all rollers in sequence. This value is the actual rotational accuracy of the grinding and alignment tool for the inner hole of the thin-walled part after adjustment. The alignment accuracy of this invention can reach approximately 0.01 mm.

[0065] S8, rotate the thin-walled part inner hole grinding and alignment auxiliary tool to make each set of roller positioning column assemblies disengage from the inner circle of the arc calibration plate 6, rotate the ejector handle downward to drive the eccentric shaft to rotate, drive the top shaft 7 to eject the thin-walled part inner hole grinding and alignment auxiliary tool, and install it into the equipment for use.

[0066] Using the rapid adjustment mechanism and method of the offline thin-walled part inner hole grinding tool of the present invention, it is possible to ensure that all positioning pins on the thin-walled part inner hole grinding tool can be quickly and concentrically adjusted, while shortening the adjustment time to within 30 minutes and the adjustment accuracy to within 0.01mm.

[0067] It should be noted that the structure and working principle of the first set of roller positioning column assemblies mentioned above are consistent with CN115026603A and belong to the prior art.

[0068] Those skilled in the art will readily understand that the above are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, combinations, substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A quick adjustment mechanism for an offline thin-walled part inner hole grinding tool, characterized in that: The fixture includes a fixture base (1) with a guide keyway, on which an arc calibration plate support (5) is movably and adjustablely connected, and an arc calibration plate (6) is detachably connected to the arc calibration plate support (5). The fixture base (1) is also provided with a tapered positioning sleeve (8) that can rotate around a calibration reference axis. The tapered positioning sleeve (8) is provided with a calibration tapered hole arranged coaxially with the calibration reference axis. The arc calibration plate (6) is provided with a calibration arc surface. The fixture also includes a concentric calibration sample (13). The concentric calibration sample (13) includes a conical part arranged coaxially for insertion and mating with the calibration conical hole, and a disc part for mating with the calibration arc surface of the arc calibration plate (6) to ensure that the central axis of the calibration arc surface is coaxial with the calibration reference axis. The diameter of the disc part corresponds to the diameter of the calibration arc surface, the diameter of the calibration arc surface corresponds to the diameter of the inner hole of the gear to be processed, the taper of the calibration conical hole corresponds to the taper of the conical part, and the taper of the calibration conical hole corresponds to the taper of the thin-walled part inner hole grinding tool.

2. The quick adjustment mechanism for the grinding tool for the inner hole of thin-walled parts according to claim 1, characterized in that: A measuring instrument frame (15) is connected to the fixture base (1), and a dial gauge (16) is arranged on the measuring instrument frame (15) extending radially along the arc calibration plate (6).

3. The quick adjustment mechanism for the grinding tool for the inner hole of thin-walled parts according to claim 1, characterized in that: The fixture base (1) is provided with a fixture support sleeve (9), the fixture support sleeve (9) is provided with a stepped hole arranged coaxially with the calibration reference axis, and the upper end face of the fixture support sleeve (9) is provided with a rolling bearing (12).

4. The quick adjustment mechanism for the grinding tool for the inner hole of thin-walled parts according to claim 3, characterized in that: The tapered positioning sleeve (8) is a stepped shaft shape, and the shape of the tapered positioning sleeve (8) corresponds to the shape of the stepped hole of the clamp support sleeve (9).

5. The quick adjustment mechanism for the grinding tool for the inner hole of thin-walled parts according to claim 4, characterized in that: The small diameter end of the correction tapered hole of the tapered positioning sleeve (8) is provided with a top shaft (7) that can be axially displaced along the correction reference axis.

6. The quick adjustment mechanism for the grinding tool for the inner hole of thin-walled parts according to claim 5, characterized in that: The fixture base (1) is provided with a long eccentric shaft (10) for driving the top shaft (7) to move axially along the correction reference axis, and the top shaft (7) is provided with an eccentric hole that mates with the long eccentric shaft (10).

7. The quick adjustment mechanism for the grinding tool for thin-walled parts under offline conditions as described in claim 1, characterized in that: A locking shaft (4) extending axially along the calibration reference axis and an eccentric shaft (3) cooperating with the locking shaft (4) are provided between the arc calibration plate support (5) and the fixture base (1). The central axis of the eccentric shaft (3) is perpendicular to the central axis of the locking shaft (4). An eccentric hole for cooperating with the eccentric shaft (3) is provided on the locking shaft (4). The locking shaft (4) is slidably connected to the arc calibration plate support (5) with axial displacement along the calibration reference axis. By moving the locking shaft (4) up or down, the arc calibration plate support (5) can be locked and released on the fixture base (1).

8. The quick adjustment mechanism for the grinding tool for thin-walled parts inline as described in claim 3, characterized in that: A limiting pin (14) is provided between the tapered positioning sleeve (8) and the clamp support sleeve (9), and the central axis of the limiting pin (14) is perpendicular to the central axis of the calibration reference shaft.

9. The quick adjustment mechanism for the grinding tool for the inner hole of thin-walled parts according to claim 1, characterized in that: The disk portion of the arc calibration plate (6) is a disk, and the outer circumferential surface of the disk includes adjacent arc-shaped curved surfaces and rectangular planes.

10. A method for rapid adjustment of grinding fixtures for inner holes of thin-walled parts, characterized in that: It uses a quick adjustment mechanism for offline thin-walled part internal hole grinding fixtures as described in claim 7 to achieve the adjustment of offline thin-walled part internal hole grinding fixtures, the specific steps of which include... S1, install the concentric calibration sample (13) on the tapered positioning sleeve (8), based on the fit between the tapered part of the concentric calibration sample (13) and the calibration tapered hole of the tapered positioning sleeve (8), loosen the arc calibration plate support (5), move the arc calibration plate (6) straight along the guide keyway of the fixture base (1) to adjust the calibration arc surface of the arc calibration plate (6) to fit and be concentric with the disc part of the concentric calibration sample (13), and fix it with connecting screws, rotate the eccentric shaft (3) upward to lock the arc calibration plate support (5), remove the connecting screws, and the disc part of the concentric calibration sample (13) and the calibration arc surface of the arc calibration plate (6) fit together to achieve the coaxiality of the central axis of the arc calibration plate (6) and the calibration reference axis; S2, take the concentric calibration sample (13) out from the tapered positioning sleeve (8), install the thin-walled part inner hole grinding tool on the tapered positioning sleeve (8), adjust the position of each roller positioning column assembly on the thin-walled part inner hole grinding tool in sequence, and rotate each roller positioning column assembly in turn to ensure that it is tangent to the calibration arc surface of the arc calibration plate (6).

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