A grinding wheel rod for grinding deep holes of rotary parts and a using method thereof

Abstract

A grinding wheel rod for grinding deep holes of rotary parts and a using method thereof belong to the technical field of process equipment design and manufacturing. The stability of the grinding wheel rod is improved by using front and rear housings and a large flange as a support framework, and the rotation of the grinding wheel is driven by a multi-shaft transmission mode to ensure the stable rotation of the grinding wheel, thereby realizing the deep hole grinding of aviation parts. The special deep hole grinding wheel rod for aviation parts solves the problem that the deep holes of aviation parts cannot be ground in the past, is easy to operate during use, rotates flexibly, effectively avoids the vibration caused by the excessive length of the grinding wheel rod, greatly improves the surface quality of the deep holes of the machined parts, and the machining efficiency of the product is also obviously improved.

Description

Technical Field

[0001] This invention provides a grinding wheel rod for grinding deep holes in rotating parts and a method for using it, which solves the problem of deep holes being impossible to grind or having low grinding accuracy, thereby improving the quality of rotating aerospace parts and increasing production efficiency. It belongs to the field of process equipment design and manufacturing technology. Background Technology

[0002] Some aerospace parts have deep holes, some even reaching a depth of about one meter, and require a high degree of surface finish. Currently, these deep holes are generally machined using precision boring. However, because the boring bar is long, it will generate a certain amount of vibration during the machining process, so the cutting depth must be strictly controlled. Even so, the surface quality of the machined hole is not good, and the machining efficiency is extremely low, which seriously restricts the product delivery schedule.

[0003] The inventors of this invention had tried grinding, but due to the excessive length of the grinding wheel rod, it produced a large wobble during rotation, resulting in significant wheel oscillation, making grinding impossible. Therefore, there is currently no good solution. Summary of the Invention

[0004] The technical problem to be solved by this invention is:

[0005] The purpose of this invention is to provide a grinding wheel rod for grinding deep holes in rotating parts and a method of using it. The front and rear housings and a large flange are used as a support frame to improve the stability of the grinding wheel rod. The grinding wheel is driven to rotate internally by a multi-axis transmission method to ensure stable rotation of the grinding wheel, thereby realizing the grinding of deep holes in aerospace parts.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A grinding wheel bar for grinding deep holes in rotating parts, the grinding wheel bar comprising a round nut 1, a drive claw 2, a large cap 3, a large sealing ring 4, a large flange 5, a rear spindle 6, a large outer bushing 8, a large inner bushing 9, two angular contact bearings A10, a rear housing 11, two rubber pads 12, a nut 13, a small flange 15, a sliding bushing 16, a set screw 17, a spring 18, a washer A19, a front housing 20, a front spindle 21, washers B22, six angular contact bearings B23, a small outer bushing 25, a small inner bushing 26, a small sealing ring 27, and a small cap 28.

[0008] The large flange 5 is fixedly connected to the rear housing 11. The large flange 5 is located at the right end of the rear housing 11 and is used to connect with the grinding machine flange and to fix the rear housing 11. The rear housing 11 is the base of the entire grinding wheel rod and serves as a support and reference.

[0009] Press the first angular contact bearing A10 into the rear spindle 6, with the left end face of the inner ring of the first angular contact bearing A10 contacting the shoulder of the rear spindle 6; fit the large inner bushing 9 into the rear spindle 6 from the right end; insert the rear spindle 6, with the first angular contact bearing A10 and the large inner bushing 9 assembled, into the inner hole of the rear housing 11 from the right side, so that the left end face of the outer sleeve of the first angular contact bearing A10 contacts the bottom of the inner hole of the rear housing 11; assemble the large outer bushing 8 from the right end, with the left end face of the large outer bushing 8 contacting the right end face of the outer ring of the first angular contact bearing A10; press the second angular contact bearing A10 into the rear spindle 6 from the right end, with the left end face of the outer ring of the second angular contact bearing A10 contacting the right end face of the large outer bushing 8, and the left end face of the inner ring contacting the right end of the large inner bushing 9; insert the sealing ring B36 into the inner annular groove of the large sealing ring 4; then The large sealing ring 4 is assembled onto the rear housing 11 via a threaded connection. After tightening, the left end face contacts the outer ring of the second angular contact bearing A10. Next, the large sealing cap 3 is threaded onto the threaded hole of the large sealing ring 4. After tightening, the left end face of the large inner bushing 9 contacts the right end face of the inner ring of the first angular contact bearing A10. The transmission claw 2 is fixedly connected to the rear spindle 6 via a tapered surface fit. The transmission claw 2 is fitted onto the tapered outer circle of the rear spindle 6. The transmission claw 2 is used to fix the connection between the rear spindle 6 and the grinding wheel spindle, thereby realizing the torque transmission between the grinding wheel spindle and the rear spindle 6. A round nut 1 is installed on the rightmost end of the rear spindle 6 and tightened. Two rubber pads 12 are glued to the upper and lower surfaces of the square groove on the left end of the rear spindle 6 to buffer the rear spindle 6 during the start and stop of the grinding wheel spindle.

[0010] The small flange 15 is fixedly connected to the front housing 20. The small flange 15 is used to fix the front housing 20 to the rear housing 11. The front housing 20 serves as the mounting base for the front spindle 21, providing support and a reference.

[0011] Starting from the left end, install the first and second angular contact bearings B23, the small inner bushing 26, the small outer bushing 25, and the third and fourth angular contact bearings B23 onto the front spindle 21, ensuring that the right end face of the inner ring of the first angular contact bearing B23 contacts the left end face of the shoulder of the front spindle 21; place the washer B22 onto the front spindle 21 from the right end; insert the assembled front spindle 21 assembly into the left end of the hole in the front housing 20; and then tighten the small sealing ring 27, which has been fitted with the sealing ring A35, onto the threaded hole at the left end of the front housing 20 using a threaded connection. Make the right end face of the small sealing ring 27 contact the left end face of the outer ring of the fourth angular contact bearing B23, make the right end of the washer B22 contact the bottom of the inner hole of the front housing 20, and make the left end of the washer B22 contact the right end face of the outer ring of the first angular contact bearing B23. The small outer bushing 25 and the small inner bushing 26 contact the outer ring and inner ring of the corresponding angular contact bearing B23, respectively. Tighten the small sealing cap 28 on the threaded hole of the small sealing ring 27 in the form of a threaded connection, so that the right end face of the small sealing cap 28 contacts the left end face of the inner ring of the fourth angular contact bearing B23.

[0012] Insert washer A19 into the inner hole of front housing 20 from the right end, making it contact with the bottom of the hole; insert springs 18 into the holes located on the left end face of sliding bushing 16; insert sliding bushing 16 with springs 18 installed into the inner hole of front housing 20, and then press the fifth and sixth angular contact bearings B23 sequentially from the right end of front spindle 21. The inner wall of the inner ring of the two angular contact bearings B23 presses against the shaft of front spindle 21, and the outer wall of the outer ring presses against the inner wall of the front housing 20. The left end face of the outer ring of the fifth angular contact bearing B23 contacts the right end face of sliding bushing 16, and the left end face of the inner ring contacts the right end of the shoulder of front spindle 21; screw nut 13 onto the threaded part of the right end of front spindle 21. After tightening, the left end face of nut 13 contacts the right end face of the inner ring of the sixth angular contact bearing B23; then tighten the set screw 17.

[0013] Align the flat part at the right end of the front spindle 21 with the square slot at the left end of the rear spindle 6, and fix the right end of the small flange 15 to the left end of the rear housing 11.

[0014] Furthermore, there are 6-8 bolts (14) and 4-6 springs (18).

[0015] Furthermore, the grinding wheel rod also includes a countersunk screw A7, which is screwed into the threaded hole on the rear housing 11 and into the corresponding side wall hole of the large outer bushing 8 to achieve positioning and prevent it from shifting during use.

[0016] Furthermore, the grinding wheel rod also includes a countersunk screw B24, which is screwed into the threaded hole on the front housing 20 and into the corresponding side wall hole of the small outer bushing 25 to achieve a limit and prevent its position from shifting during use.

[0017] Furthermore, the right end of the small flange 15 is fitted onto the left end stepped circle of the rear housing 11. The small flange 15 is rotated so that the hole on the small flange 15 is aligned with the threaded hole on the left end face of the rear housing 11. Bolts 14 are then installed and tightened.

[0018] Furthermore, when assembling the sliding bushing 16, the relative position of the outer circle of the sliding bushing 16 and the circumference of the front housing 20 should be adjusted; after assembly, tighten the set screw 17, but do not tighten it.

[0019] A method for using a grinding wheel bar for grinding deep holes in rotating parts, comprising the following steps:

[0020] (1) Assemble the transmission claw 2 of the assembled aerospace-specific deep hole grinding wheel rod onto the grinding machine spindle. The large flange 5 is fastened to the grinding machine spindle box flange with bolts. Insert the grinding wheel seat 29 from the left end of the front spindle 21. Slide the shim A30 onto the stepped circle of the grinding wheel seat 29. Then slide the grinding wheel 31 onto the stepped circle of the grinding wheel seat 29. Slide the shim B32 onto the stepped circle of the grinding wheel seat 29. Then slide the washer C33 onto the stepped circle of the grinding wheel seat 29. Then screw a thin nut 34 onto the threaded part at the left end of the front spindle 21 and tighten it. Finally, screw on another thin nut 34 and tighten it.

[0021] (2) Start the grinding wheel spindle of the grinding machine. Through this device, the grinding wheel spindle drives the grinding wheel 31 to start rotating. After idling for a certain period of time, observe the condition of the grinding wheel and the working condition of the special deep hole grinding wheel rod for aerospace parts. After the grinding wheel is stable, use a diamond pen to dress the outer circle of the grinding wheel.

[0022] (3) After clamping and aligning the part to be ground, set the parameters and start deep hole grinding.

[0023] The beneficial effects of this invention are: the special deep hole grinding wheel bar for aerospace parts solves the problem that deep holes in aerospace parts cannot be ground in the past. It is easy to operate and rotates flexibly during use, effectively avoiding vibration caused by excessive length of the grinding wheel bar, greatly improving the surface quality of deep holes in the workpiece, and significantly improving the processing efficiency of the product. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 Schematic diagram of the grinding wheel rod structure.

[0026] In the diagram: 1-Round nut, 2-Drive claw, 3-Large cap, 4-Large sealing ring, 5-Large flange, 6-Rear spindle, 7-Counterhead screw A, 8-Large outer bushing, 9-Large inner bushing, 10-Angular contact bearing A, 11-Rear housing, 12-Rubber pad, 13-Nut, 14-Bolt, 15-Small flange, 16-Sliding bushing, 17-Set screw, 18-Spring, 19-Washer A, 20-Front housing, 21-Front spindle, 22-Washer B, 23-Angular contact bearing B, 24-Counterhead screw B, 25-Small outer bushing, 26-Small inner bushing, 27-Small sealing ring, 28-Small cap, 29-Grinding wheel seat, 30-Ship A, 31-Grinding wheel, 32-Ship B, 33-Washer C, 34-Thin nut, 35-Sealing ring A, 36-Sealing ring B.

[0027] It should be understood that the accompanying drawings are not drawn to scale, but are merely appropriately simplified depictions to illustrate the various features of the basic principles of the invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and environment in which they are used. In the accompanying drawings, the same or equivalent parts (elements) are indexed with the same reference numerals. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and technical solutions.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] A grinding wheel bar for grinding deep holes in rotating parts, the grinding wheel bar comprising a round nut 1, a drive claw 2, a large cap 3, a large sealing ring 4, a large flange 5, a rear spindle 6, a countersunk screw A7, a large outer bushing 8, a large inner bushing 9, two angular contact bearings A10, a rear housing 11, two rubber pads 12, a nut 13, six bolts 14, a small flange 15, a sliding bushing 16, a set screw 17, four springs 18, a washer A19, a front housing 20, a front spindle 21, a washer B22, six angular contact bearings B23, a countersunk screw B24, a small outer bushing 25, a small inner bushing 26, a small sealing ring 27, and a small cap 28.

[0031] The large flange 5 is connected to the rear housing 11 by welding. The large flange 5 is located at the right end of the rear housing 11 and is used to connect with the grinding machine flange and to fix the rear housing 11. The rear housing 11 is the base of the entire grinding wheel rod and serves as a support and reference.

[0032] Press the first angular contact bearing A10 into the rear spindle 6, with the left end face of the inner ring of the first angular contact bearing A10 contacting the shoulder of the rear spindle 6; fit the large inner bushing 9 into the rear spindle 6 from the right end; insert the rear spindle 6, with the first angular contact bearing A10 and the large inner bushing 9 assembled, into the inner hole of the rear housing 11 from the right side, so that the left end face of the outer sleeve of the first angular contact bearing A10 contacts the bottom of the inner hole of the rear housing 11; assemble the large outer bushing 8 from the right end, with the left end face of the large outer bushing 8 contacting the right end face of the outer ring of the first angular contact bearing A10; press the second angular contact bearing A10 into the rear spindle 6 from the right end, with the left end face of the outer ring of the second angular contact bearing A10 contacting the right end face of the large outer bushing 8, and the left end face of the inner ring contacting the right end of the large inner bushing 9; insert the sealing ring B36 into the inner annular groove of the large sealing ring 4; then The large sealing ring 4 is assembled onto the rear housing 11 via a threaded connection. After tightening, the left end face contacts the outer ring of the second angular contact bearing A10. Next, the large sealing cap 3 is threaded onto the threaded hole of the large sealing ring 4. After tightening, the left end face of the large inner bushing 9 contacts the right end face of the inner ring of the first angular contact bearing A10. The transmission claw 2 is fixedly connected to the rear spindle 6 via a tapered surface fit. The transmission claw 2 is fitted onto the tapered outer circle of the rear spindle 6. The transmission claw 2 is used to fix the connection between the rear spindle 6 and the grinding wheel spindle, thereby realizing the torque transmission between the grinding wheel spindle and the rear spindle 6. A round nut 1 is installed on the rightmost end of the rear spindle 6 and tightened. Two rubber pads 12 are glued to the upper and lower surfaces of the square groove on the left end of the rear spindle 6 to buffer the rear spindle 6 during the start and stop of the grinding wheel spindle. The countersunk screw A7 is screwed into the threaded hole on the rear housing 11 and into the corresponding side wall hole of the large outer bushing 8 to achieve a limit and prevent its position from shifting during use.

[0033] The small flange 15 and the front housing 20 are connected by welding. The small flange 15 realizes the fixed connection between the front housing 20 and the rear housing 11. The front housing 20 serves as the mounting base for the front spindle 21, playing a supporting and reference role.

[0034] Starting from the left end, install the first and second angular contact bearings B23, the small inner bushing 26, the small outer bushing 25, and the third and fourth angular contact bearings B23 onto the front spindle 21, ensuring that the right end face of the inner ring of the first angular contact bearing B23 contacts the left end face of the shoulder of the front spindle 21; place the washer B22 onto the front spindle 21 from the right end; insert the assembled front spindle 21 assembly into the left end of the hole in the front housing 20; then tighten the small sealing ring 27, which has been fitted with the sealing ring A35, into the threaded hole at the left end of the front housing 20 using a threaded connection, ensuring that the right end face of the small sealing ring 27 contacts the left end face of the outer ring of the fourth angular contact bearing B23. The right end of washer B22 contacts the bottom of the inner hole of the front housing 20, and the left end of washer B22 contacts the right end face of the outer ring of the first angular contact bearing B23. The small outer bushing 25 and the small inner bushing 26 contact the outer ring and inner ring of the corresponding angular contact bearing B23, respectively. The small cap 28 is screwed into the threaded hole of the small sealing ring 27 in the form of a threaded connection, so that the right end face of the small cap 28 contacts the left end face of the inner ring of the fourth angular contact bearing B23. The countersunk screw B24 is screwed into the threaded hole on the front housing 20 and into the corresponding side wall hole of the small outer bushing 25 to achieve positioning and prevent it from moving during use.

[0035] Insert washer A19 into the inner hole of the front housing 20 from the right end, ensuring it contacts the bottom of the hole; insert four springs 18 into the four holes located on the left end face of the sliding bushing 16; insert the sliding bushing 16 with the four springs 18 installed into the inner hole of the front housing 20, adjusting the relative position of the outer circumference of the sliding bushing 16 and the threaded hole of the set screw 17 on the circumference of the front housing 20 during assembly; tighten the set screw 17, but do not tighten it completely; then press the fifth and sixth angular contact shafts sequentially from the right end of the front spindle 21. Bearing B23, the inner wall surface of the inner ring of the two angular contact bearings B23 presses against the shaft of the front main shaft 21, and the outer wall surface of the outer ring presses against the inner wall of the front housing 20. The left end face of the outer ring of the fifth angular contact bearing B23 contacts the right end face of the sliding bushing 16, and the left end face of the inner ring contacts the right end of the shoulder of the front main shaft 21. Screw the nut 13 onto the threaded part at the right end of the front main shaft 21. After tightening, the left end face of the nut 13 contacts the right end face of the inner ring of the sixth angular contact bearing B23. Then tighten the set screw 17.

[0036] Align the flat part at the right end of the front spindle 21 with the square slot at the left end of the rear spindle 6. Assemble the right end of the small flange 15 onto the stepped circle at the left end of the rear housing 11. Rotate the small flange 15 so that the six holes on the small flange 15 are aligned with the six threaded holes on the left end face of the rear housing 11. Install the six bolts 14 and tighten them.

[0037] The specific usage method is as follows:

[0038] (1) When in use, assemble the transmission claw 2 of the assembled aerospace-specific deep hole grinding wheel rod onto the grinding machine spindle, and fasten the large flange 5 to the grinding machine spindle box flange with bolts; insert the grinding wheel seat 29 from the left end of the front spindle 21; fit the shim A30 into the stepped circle of the grinding wheel seat 29; then fit the grinding wheel 31 into the stepped circle of the grinding wheel seat 29; fit the shim B32 into the stepped circle of the grinding wheel seat 29; then fit the washer C33 into the stepped circle of the grinding wheel seat 29; then screw a thin nut 34 onto the threaded part at the left end of the front spindle 21 and tighten it; finally screw on another thin nut 34 and tighten it.

[0039] (2) Start the grinding wheel spindle of the grinding machine. Through this device, the grinding wheel spindle drives the grinding wheel 31 to start rotating. After idling for a certain period of time, observe the condition of the grinding wheel and the working condition of the special deep hole grinding wheel rod for aerospace parts. After the grinding wheel is stable, use a diamond pen to dress the outer circle of the grinding wheel.

[0040] (3) After clamping and aligning the part to be ground, set the parameters and start deep hole grinding.

[0041] This special deep hole grinding wheel bar for aerospace parts solves the problem that deep holes in aerospace parts cannot be ground in the past. It is easy to operate and rotates flexibly during use, effectively avoiding vibration caused by excessive length of the grinding wheel bar, greatly improving the surface quality of deep holes in the workpiece, and significantly improving the processing efficiency of the product.

Claims

1. A grinding wheel bar for grinding deep holes in rotating parts, characterized in that, The grinding wheel rod includes a round nut (1), a transmission claw (2), a large cap (3), a large sealing ring (4), a large flange (5), a rear spindle (6), a large outer bushing (8), a large inner bushing (9), two angular contact bearings A (10), a rear housing (11), two rubber pads (12), a nut (13), a small flange (15), a sliding bushing (16), a set screw (17), a spring (18), a washer A (19), a front housing (20), a front spindle (21), six washers B (22), six angular contact bearings B (23), a small outer bushing (25), a small inner bushing (26), a small sealing ring (27), and a small cap (28). The large flange (5) is fixedly connected to the rear housing (11). The large flange (5) is located at the right end of the rear housing (11) and is used to connect with the grinding machine flange and to fix the rear housing (11). The rear housing (11) is the base of the entire grinding wheel rod and plays the role of support and reference. Press the first angular contact bearing A (10) into the rear spindle (6), with the left end face of the inner ring of the first angular contact bearing A (10) contacting the shoulder of the rear spindle (6); fit the large inner bushing (9) into the rear spindle (6) from the right end; insert the rear spindle (6) with the first angular contact bearing A (10) and the large inner bushing (9) assembled into it into the inner hole of the rear housing (11) from the right side, so that the left end face of the outer ring of the first angular contact bearing A (10) is in contact with the inner hole of the rear housing (11). Bottom contact; assemble the large outer bushing (8) from the right end, with the left end face of the large outer bushing (8) contacting the right end face of the outer ring of the first angular contact bearing A (10); press the second angular contact bearing A (10) into the right end of the rear spindle (6), with the left end face of the outer ring of the second angular contact bearing A (10) contacting the right end face of the large outer bushing (8), and the left end face of the inner ring contacting the right end of the large inner bushing (9); install the sealing ring B (36) into the inner annular groove of the large sealing ring (4). Then, the large sealing ring (4) is assembled onto the rear housing (11) in a threaded connection. After tightening, the left end face contacts the outer ring of the second angular contact bearing A (10). Next, the large sealing cap (3) is threaded onto the threaded hole of the large sealing ring (4). After tightening, the left end face of the large inner bushing (9) contacts the right end face of the inner ring of the first angular contact bearing A (10). The transmission claw (2) and the rear spindle (6) are fixedly connected by a tapered surface fit. The moving claw (2) is fitted onto the tapered outer circle of the rear spindle (6). The transmission claw (2) is used to fix the connection between the rear spindle (6) and the grinding wheel spindle, thereby realizing the torque transmission between the grinding wheel spindle and the rear spindle (6). A round nut (1) is installed on the rightmost end of the rear spindle (6) and tightened. Two rubber pads (12) are glued to the upper and lower surfaces of the square groove on the left end of the rear spindle (6) to buffer the rear spindle (6) when the grinding wheel spindle starts and stops. The small flange (15) and the front housing (20) are fixedly connected. The small flange (15) is used to achieve the fixed connection between the front housing (20) and the rear housing (11). The front housing (20) serves as the mounting base for the front spindle (21) and plays the role of support and reference. Starting from the left end, install the first and second angular contact bearings B (23), the small inner bushing (26), the small outer bushing (25), and the third and fourth angular contact bearings B (23) onto the front spindle (21), so that the right end face of the inner ring of the first angular contact bearing B (23) contacts the left end face of the shoulder of the front spindle (21); put the washer B (22) onto the front spindle (21) from the right end; insert the assembled front spindle (21) assembly into the left end of the hole in the front housing (20); then tighten the small sealing ring (27) with the sealing ring A (35) already assembled onto the threaded hole at the left end of the front housing (20) in the form of a threaded connection. Make the right end face of the small sealing ring (27) contact the left end face of the outer ring of the fourth angular contact bearing B (23), make the right end of the washer B (22) contact the bottom of the inner hole of the front housing (20), make the left end of the washer B (22) contact the right end face of the outer ring of the first angular contact bearing B (23), and make the small outer bushing (25) and the small inner bushing (26) contact the outer ring and inner ring of the corresponding angular contact bearing B (23) respectively; tighten the small sealing cap (28) in the threaded hole of the small sealing ring (27) in the form of a threaded connection, so that the right end face of the small sealing cap (28) contacts the left end face of the inner ring of the fourth angular contact bearing B (23); Insert washer A (19) into the inner hole of the front housing (20) from the right end, and make contact with the bottom of the hole; insert springs (18) into the holes located on the left end face of sliding bushings (16); insert sliding bushings (16) with springs (18) installed into the inner hole of the front housing (20), and then press the fifth and sixth angular contact bearings B (23) into the front main shaft (21) from the right end in sequence, with the inner wall of the inner ring of the two angular contact bearings B (23) pressing against the axial pressure of the front main shaft (21). The outer ring of the fifth angular contact bearing B (23) is pressed against the inner wall of the front housing (20). The left end face of the outer ring of the fifth angular contact bearing B (23) is in contact with the right end face of the sliding bushing (16), and the left end face of the inner ring is in contact with the right end of the shoulder of the front spindle (21). The nut (13) is screwed onto the threaded part at the right end of the front spindle (21). After tightening, the left end face of the nut (13) is in contact with the right end face of the inner ring of the sixth angular contact bearing B (23). Then the set screw (17) is tightened. Align the flat part at the right end of the front spindle (21) with the square slot at the left end of the rear spindle (6), and fix the right end of the small flange (15) to the left end of the rear housing (11).

2. A grinding wheel rod for grinding deep holes in rotating parts according to claim 1, characterized in that, There are 6-8 bolts (14) and 4-6 springs (18).

3. A grinding wheel bar for grinding deep holes in rotating parts according to claim 1 or 2, characterized in that, The grinding wheel rod also includes a countersunk screw A (7), which is screwed into the threaded hole on the rear housing (11) and into the corresponding side wall hole of the large outer bushing (8) to achieve a limit and prevent its position from shifting during use.

4. A grinding wheel bar for grinding deep holes in rotating parts according to claim 1 or 2, characterized in that, The grinding wheel rod also includes a countersunk screw B (24), which is screwed into the threaded hole on the front housing (20) and into the corresponding side wall hole of the small outer bushing (25) to achieve a limit and prevent its position from shifting during use.

5. A grinding wheel bar for grinding deep holes in rotating parts according to claim 3, characterized in that, The grinding wheel rod also includes a countersunk screw B (24), which is screwed into the threaded hole on the front housing (20) and into the corresponding side wall hole of the small outer bushing (25) to achieve a limit and prevent its position from shifting during use.

6. A grinding wheel bar for grinding deep holes in rotating parts according to claim 1, 2, or 5, characterized in that, Mount the right end of the small flange (15) onto the left end stepped circle of the rear housing (11), rotate the small flange (15) so that the hole on the small flange (15) is aligned with the threaded hole on the left end face of the rear housing (11), install the bolts (14) respectively, and tighten them.

7. A grinding wheel bar for grinding deep holes in rotating parts according to claim 3, characterized in that, Mount the right end of the small flange (15) onto the left end stepped circle of the rear housing (11), rotate the small flange (15) so that the hole on the small flange (15) is aligned with the threaded hole on the left end face of the rear housing (11), install the bolts (14) respectively, and tighten them.

8. A grinding wheel bar for grinding deep holes in rotating parts according to claim 4, characterized in that, Mount the right end of the small flange (15) onto the left end stepped circle of the rear housing (11), rotate the small flange (15) so that the hole on the small flange (15) is aligned with the threaded hole on the left end face of the rear housing (11), install the bolts (14) respectively, and tighten them.

9. A grinding wheel bar for grinding deep holes in rotating parts according to claim 1, 2, 5, 7 or 8, characterized in that, When assembling the sliding bushing (16), the relative position of the outer circle of the sliding bushing (16) and the circumference of the front housing (20) should be adjusted. After assembly, tighten the set screw (17) without tightening it.

10. A method of using a grinding wheel rod for grinding deep holes in rotating parts as described in claim 1, 2, 5, 7, or 8, characterized in that, The steps are as follows: (1) Assemble the transmission claw (2) of the assembled aerospace part special deep hole grinding wheel rod on the grinding machine grinding wheel spindle, and fasten the large flange (5) to the grinding machine grinding wheel spindle box flange with bolts; install the grinding wheel seat (29) from the left end of the front spindle (21); fit the shim A (30) into the step circle of the grinding wheel seat (29); then fit the grinding wheel (31) into the step circle of the grinding wheel seat (29); fit the shim B (32) into the step circle of the grinding wheel seat (29); then fit the washer C (33) into the step circle of the grinding wheel seat (29); then screw a thin nut (34) onto the threaded part at the left end of the front spindle (21) and tighten it; finally screw on another thin nut (34) and tighten it. (2) Start the grinding wheel spindle of the grinding machine. Through the grinding wheel rod, the grinding machine spindle drives the grinding wheel (31) to start rotating. After idling for a certain period of time, observe the state of the grinding wheel and the working state of the special deep hole grinding wheel rod for aerospace parts. After the grinding wheel is stable, use a diamond pen to trim the outer circle of the grinding wheel. (3) After clamping and aligning the part to be ground, set the parameters and start deep hole grinding.

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