Grinding wheel rod for grinding deep hole of rotary part and using method

Abstract

The invention discloses a grinding wheel rod for grinding a deep hole of a rotary part and a using method, and belongs to the technical field of technological equipment design and manufacturing. The front shell, the rear shell and the large flange plate serve as a supporting framework, the stability of the grinding wheel rod is improved, the grinding wheel is driven to rotate in a multi-shaft transmission mode inside, stable rotation of the grinding wheel is guaranteed, and therefore deep hole grinding of aeronautical parts is achieved. The deep hole grinding wheel rod special for the aeronautical part solves the problem that a deep hole of the aeronautical part cannot be ground in the prior art, is easy and convenient to operate and flexible to rotate in the using process, effectively avoids vibration caused by the fact that the grinding wheel rod is too long, greatly improves the surface quality of the deep hole of a machined part, and obviously improves the machining efficiency of a product.

Description

Technical Field

[0001] The present invention provides a grinding wheel rod for grinding deep holes of rotating parts and a method for using the grinding wheel rod, which solves the problem that deep holes cannot be ground or the grinding accuracy is low, so as to improve the quality of rotating aviation parts and enhance production efficiency, and belongs to the field of process equipment design and manufacturing technology. Background Art

[0002] The holes of some aviation parts are deep, some of which are even about one meter deep, and the surface finish requirements are relatively high. At present, the processing of such deep holes is generally achieved by precision boring, but because the boring bar is long, the boring bar will produce certain vibrations during the processing, so the cutting depth must be strictly controlled. Even so, the surface quality of the processed holes is not good, and the processing efficiency is extremely low, which seriously restricts the delivery progress of the product.

[0003] The inventor team of the present invention has tried to use grinding, but because the length of the grinding wheel rod is too long, a large deflection is generated during the rotation of the grinding wheel rod, causing the grinding wheel to swing greatly, so grinding cannot be performed. Therefore, there is no better solution at present. Summary of the invention

[0004] The technical problems to be solved by the present invention are:

[0005] The purpose of the present invention is to provide a grinding wheel rod for grinding deep holes of rotating parts and a method of use, which utilizes front and rear shells and a large flange as a supporting framework to improve the stability of the grinding wheel rod, and adopts a multi-axis transmission method internally to drive the grinding wheel to rotate, thereby ensuring the stable rotation of the grinding wheel, thereby realizing deep hole grinding of aviation parts.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A grinding wheel rod for grinding deep holes of rotating parts, the grinding wheel rod comprises a round nut 1, a transmission claw 2, a large sealing 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, a washer B22, six angular contact bearings B23, a small outer bushing 25, a small inner bushing 26, a small sealing ring 27 and a small sealing 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 flange of the grinder and fix the rear housing 11. The rear housing 11 is the base of the entire grinding wheel rod and plays a supporting and reference role.

[0009] Press the first angular contact bearing A10 into the rear spindle 6, so that the left end face of the inner ring of the first angular contact bearing A10 contacts the shoulder of the rear spindle 6; insert the large inner bushing 9 into the rear spindle 6 from the right end; install the rear spindle 6 assembled with the first angular contact bearing A10 and the large inner bushing 9 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, so that the left end face of the large outer bushing 8 contacts the right end face of the outer ring of the first angular contact bearing A10; press the second angular contact bearing A10 into the right end of the rear spindle 6, so that the left end face of the outer ring of the second angular contact bearing A10 contacts the right end face of the large outer bushing 8, and the left end face of the inner ring contacts the right end of the large inner bushing 9; install the sealing ring B36 into the inner annular groove of the large sealing ring 4; then The large sealing ring 4 is assembled on the rear housing 11, and the connection form is a threaded connection. After tightening, the left end face contacts the outer ring of the second angular contact bearing A10; then the large sealing cap 3 is connected to the threaded hole of the large sealing ring 4 in a threaded form. 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 and the rear spindle 6 are fixedly connected by conical surface matching, and the transmission claw 2 is sleeved on 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 of the grinder, thereby realizing the torque transmission between the grinder spindle and the rear spindle 6; the 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 notch at the left end of the rear spindle 6, which are used to buffer the rear spindle 6 at the moment of starting and stopping the grinding wheel spindle of the grinder.

[0010] The small flange 15 and the front housing 20 are fixedly connected, and the front housing 20 and the rear housing 11 are fixedly connected via the small flange 15. The front housing 20 serves as a mounting base for the front spindle 21 and plays a supporting and reference role.

[0011] Install the first and second angular contact bearings B23, small inner bushing 26, small outer bushing 25, third and fourth angular contact bearings B23 on the front spindle 21 from the left end, so 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; put the washer B22 on the front spindle 21 from the right end; install the assembled front spindle 21 assembly from the left end of the hole of the front housing 20; then tighten the small sealing ring 27 with the sealing ring A35 assembled on the left end threaded hole of the front housing 20 in the form of 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 gasket B22 contact the bottom of the inner hole of the front housing 20, the left end of the gasket B22 contact the right end face of the outer ring of the first angular contact bearing B23, and 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 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] Install the washer A19 into the inner hole of the front housing 20 from the right end and make contact with the bottom of the hole; install the springs 18 into the holes located on the left end face of the sliding bushing 16 respectively; install the sliding bushing 16 equipped with the spring 18 into the inner hole of the front housing 20, and then press the fifth and sixth angular contact bearings B23 in sequence from the right end of the front spindle 21, the inner wall surfaces of the inner rings of the two angular contact bearings B23 are pressed against the shaft of the front spindle 21, and the outer wall surfaces of the outer rings are pressed against the inner hole wall of the front housing 20, the left end face of the outer ring of the fifth angular contact bearing B23 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; screw the nut 13 on the threaded part at the right end of the front spindle 21, and 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 B23; then tighten the set screw 17.

[0013] Align the flat portion of the right end of the front spindle 21 with the square notch 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 to 8 bolts 14 in total, and 4 to 6 springs 18 in total.

[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 side wall hole corresponding to the large outer bushing 8 to achieve positioning and prevent its position 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 shell 20 and screwed into the side wall hole corresponding to the small outer bushing 25 to achieve positioning and prevent its position from shifting during use.

[0017] Furthermore, the right end of the small flange 15 is assembled on the left end step circle of the rear housing 11, and 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 surface of the rear housing 11, and the bolts 14 are respectively installed and tightened.

[0018] Furthermore, when assembling the sliding bushing 16, the relative position between the outer circle depression of the sliding bushing 16 and the circumference of the front housing 20 should be adjusted; at this time, after the assembly is completed, the set screw 17 is screwed on without tightening.

[0019] A method for using a grinding wheel rod for grinding deep holes of rotating parts, the steps are as follows:

[0020] (1) Assemble the transmission claw 2 of the assembled deep hole grinding wheel rod for aviation parts on the grinding wheel spindle of the grinding machine, and fasten the large flange 5 and the flange of the grinding wheel spindle box of the grinding machine by bolts; install the grinding wheel seat 29 from the left end of the front spindle 21; insert the gasket A30 into the step circle of the grinding wheel seat 29; then insert the grinding wheel 31 into the step circle of the grinding wheel seat 29; insert the gasket B32 into the step circle of the grinding wheel seat 29; then insert the washer C33 into the step circle of the grinding wheel seat 29; then screw a thin nut 34 on the left end threaded part of the front spindle 21 and tighten it; finally screw another thin nut 34 and tighten it.

[0021] (2) Start the grinding wheel spindle of the grinding machine. Through the device, the grinding wheel 31 is driven by the grinding wheel spindle to start rotating. After idling for a certain period of time, observe the state of the grinding wheel and the working state of the deep hole grinding wheel rod for aviation parts. After the grinding wheel is stable, use a diamond pen to trim the outer circle of the grinding wheel.

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

[0023] The beneficial effects of the present invention are as follows: the deep hole grinding wheel rod specially used for aviation parts solves the problem that deep holes of aviation parts cannot be ground in the past. It is easy to operate and flexible to rotate during use, and the vibration caused by the excessive length of the grinding wheel rod is effectively avoided. The surface quality of the deep holes of the processed parts is greatly improved, and the processing efficiency of the products is also significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use 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 based on these drawings without paying any creative work.

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

[0026] In the figure: 1-round nut, 2-transmission claw, 3-large sealing cap, 4-large sealing ring, 5-large flange, 6-rear spindle, 7-countersunk 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-countersunk screw B, 25-small outer bushing, 26-small inner bushing, 27-small sealing ring, 28-small sealing cap, 29-grinding wheel seat, 30-gasket A, 31-grinding wheel, 32-gasket B, 33-gasket C, 34-thin nut, 35-sealing ring A, 36-sealing ring B.

[0027] It should be understood that the attached drawings are not drawn to scale, but are merely simplified drawings of various features for the purpose of illustrating the basic principles of the present invention. The specific design features of the present invention disclosed herein, including, for example, specific dimensions, directions, positions, and shapes, will be determined in part by the specific intended application and use environment. In the attached multiple drawings, the same or equivalent components (elements) are referenced with the same reference numerals. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] A grinding wheel rod for grinding deep holes of rotating parts, the grinding wheel rod comprises a round nut 1, a driving claw 2, a large sealing 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 sealing 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 flange of the grinder and fix the rear housing 11. The rear housing 11 is the base of the entire grinding wheel rod and plays a supporting and reference role.

[0032] Press the first angular contact bearing A10 into the rear spindle 6, so that the left end face of the inner ring of the first angular contact bearing A10 contacts the shoulder of the rear spindle 6; insert the large inner bushing 9 into the rear spindle 6 from the right end; install the rear spindle 6 assembled with the first angular contact bearing A10 and the large inner bushing 9 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, so that the left end face of the large outer bushing 8 contacts the right end face of the outer ring of the first angular contact bearing A10; press the second angular contact bearing A10 into the right end of the rear spindle 6, so that the left end face of the outer ring of the second angular contact bearing A10 contacts the right end face of the large outer bushing 8, and the left end face of the inner ring contacts the right end of the large inner bushing 9; install the sealing ring B36 into the inner annular groove of the large sealing ring 4; then The large sealing ring 4 is assembled on the rear housing 11, and the connection form is a threaded connection. After tightening, the left end face contacts the outer ring of the second angular contact bearing A10; then the large sealing cap 3 is connected to the threaded hole of the large sealing ring 4 in a threaded form. 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 and the rear spindle 6 are fixedly connected by conical surface matching, and the transmission claw 2 is sleeved on 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 of the grinder, thereby realizing the torque transmission between the grinder spindle and the rear spindle 6; the 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 notch at the left end of the rear spindle 6, which are used to buffer the rear spindle 6 at the moment of starting and stopping the grinding wheel spindle of the grinder. The countersunk screw A7 is screwed into the threaded hole on the rear housing 11 and then screwed into the corresponding side wall hole of the large outer bushing 8 to achieve position limiting and prevent its position from shifting during use.

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

[0034] Install the first and second angular contact bearings B23, small inner bushing 26, small outer bushing 25, third and fourth angular contact bearings B23 on the front spindle 21 from the left end, so 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; put the washer B22 on the front spindle 21 from the right end; install the assembled front spindle 21 assembly from the left end of the hole of the front housing 20; then tighten the small sealing ring 27 with the sealing ring A35 assembled on the left end threaded hole of the front housing 20 in the form of threaded connection, so 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 small outer bushing 25 and the small inner bushing 26 are respectively in contact with the outer ring and the inner ring of the corresponding angular contact bearing B23; the small sealing cap 28 is screwed 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 is in contact with 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 side wall hole corresponding to the small outer bushing 25 to achieve limiting and prevent its position from moving during use.

[0035] Install the washer A19 from the right end into the inner hole of the front housing 20 and make contact with the bottom of the hole; install the four springs 18 into the four holes on the left end face of the sliding bushing 16 respectively; install the sliding bushing 16 with the four springs 18 assembled into the inner hole of the front housing 20, and adjust the relative position of the outer circle of the sliding bushing 16 and the threaded hole of the set screw 17 on the circumference of the front housing 20 during assembly; screw on the set screw 17 without tightening it; then press the fifth and sixth angular contact shafts in sequence from the right end of the front spindle 21 Bearing B23, the inner wall surfaces of the inner rings of the two angular contact bearings B23 are pressed into the shaft of the front main shaft 21, and the outer wall surfaces of the outer rings are pressed into the inner hole wall of the front housing 20. The left end surface of the outer ring of the fifth angular contact bearing B23 contacts the right end surface of the sliding bushing 16, and the left end surface 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, and after tightening, the left end surface of the nut 13 contacts the right end surface of the inner ring of the sixth angular contact bearing B23; then tighten the set screw 17.

[0036] Align the flat part of the right end of the front spindle 21 with the square notch at the left end of the rear spindle 6, fit the right end of the small flange 15 on the left end step circle 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 surface of the rear housing 11, install six bolts 14 respectively, and tighten them.

[0037] The specific usage is as follows:

[0038] (1) When in use, assemble the transmission claw 2 of the assembled deep hole grinding wheel rod for aviation parts on the grinding wheel spindle of the grinder, and fasten the large flange 5 and the flange of the grinding wheel spindle box of the grinder by bolts; install the grinding wheel seat 29 from the left end of the front spindle 21; insert the gasket A30 into the step circle of the grinding wheel seat 29; then insert the grinding wheel 31 into the step circle of the grinding wheel seat 29; insert the gasket B32 into the step circle of the grinding wheel seat 29; then insert the washer C33 into the step circle of the grinding wheel seat 29; then screw a thin nut 34 on the left end threaded part of the front spindle 21 and tighten it; finally screw another thin nut 34 and tighten it.

[0039] (2) Start the grinding wheel spindle of the grinding machine. Through the device, the grinding wheel 31 is driven by the grinding wheel spindle to start rotating. After idling for a certain period of time, observe the state of the grinding wheel and the working state of the deep hole grinding wheel rod for aviation parts. After the grinding wheel is stable, use a diamond pen to trim the outer circle of the grinding wheel.

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

[0041] This deep hole grinding wheel rod specially designed for aviation parts solves the problem that deep holes of aviation parts cannot be ground in the past. It is easy to operate and flexible to rotate during use, effectively avoiding the vibration caused by the excessive length of the grinding wheel rod, greatly improving the surface quality of the deep holes of the workpiece being processed, and significantly improving the processing efficiency of the product.

Claims

1. A grinding wheel bar for grinding deep holes of rotating parts, characterized in that: The grinding wheel rod comprises a round nut (1), a transmission claw (2), a large sealing 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), a washer 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 sealing 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 flange of the grinding machine and fix the rear housing (11). The rear housing (11) is the base of the entire grinding wheel rod and plays a supporting and reference role. Press the first angular contact bearing A (10) into the rear main shaft (6), so that the left end face of the inner ring of the first angular contact bearing A (10) contacts the shoulder of the rear main shaft 6; insert the large inner sleeve (9) into the rear main shaft (6) from the right end; install the rear main shaft (6) assembled with the first angular contact bearing A (10) and the large inner sleeve (9) 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 A (10) contacts the bottom of the inner hole of the rear housing (11) contact; assemble the large outer bushing (8) from the right end, the left end face of the large outer bushing (8) contacts the right end face of the outer ring of the first angular contact bearing A (10); press the second angular contact bearing A (10) from the right end of the rear main shaft (6), the left end face of the outer ring of the second angular contact bearing A (10) contacts the right end face of the large outer bushing (8), and the left end face of the inner ring contacts 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 on the rear housing (11) in the form of threaded connection. After tightening, the left end face is in contact with the outer ring of the second angular contact bearing A (10). Then, the large sealing cap (3) is connected to the threaded hole of the large sealing ring (4) in the form of threaded connection. After tightening, the left end face of the large inner bushing (9) is in contact with the right end face of the inner ring of the first angular contact bearing A (10). The transmission claw (2) and the rear main shaft (6) are fixedly connected by conical surface matching. The movable claw (2) is sleeved on the tapered outer circle of the rear spindle (6), and the transmission claw (2) is used to fix the rear spindle (6) and the grinding wheel spindle of the grinding machine, thereby realizing the torque transmission between the grinding machine 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 notch at the left end of the rear spindle (6) to play a buffering role for the rear spindle (6) when the grinding wheel spindle of the grinding machine starts and stops; The small flange (15) and the front housing (20) are fixedly connected, and the front housing (20) and the rear housing (11) are fixedly connected via the small flange (15). The front housing (20) serves as a mounting base for the front spindle (21) and plays a supporting and reference role. Install the first and second angular contact bearings B (23), the small inner bushing (26), the small outer bushing (25), the third and fourth angular contact bearings B (23) on the front main shaft (21) in sequence from the left end, 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 shaft shoulder of the front main shaft (21); put the washer B (22) on the front main shaft 21 from the right end; install the assembled front main shaft 21 assembly from the left end of the hole of the front housing (20); then tighten the small sealing ring (27) with the sealing ring A (35) assembled on the left end threaded hole of the front housing (20) in the form of threaded connection, so 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 B (23), so that the right end of the gasket B (22) contacts the bottom of the inner hole of the front housing (20), the left end of the gasket B (22) contacts the right end face of the outer ring of the first angular contact bearing B (23), and 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; the small sealing cap (28) is screwed onto 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); Install the washer A (19) from the right end into the inner hole of the front housing (20) and make contact with the bottom of the hole; install the springs (18) into the holes located on the left end surface of the sliding bushing (16); install the sliding bushing (16) with the spring (18) installed into the inner hole of the front housing (20), and then press the fifth and sixth angular contact bearings B (23) in sequence from the right end of the front main shaft (21). The inner wall surfaces of the inner rings of the two angular contact bearings B (23) are aligned with the axis of the front main shaft (21). Press fit, the outer wall of the outer ring is pressed into the inner hole 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 shaft shoulder of the front main shaft (21); screw the nut (13) onto the right end threaded portion of the front main shaft 21, and 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 tighten the set screw (17); The flat portion at the right end of the front main shaft (21) is aligned with the square notch at the left end of the rear main shaft (6), and the right end of the small flange (15) is fixed to the left end of the rear housing (11).

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

3. A grinding wheel bar for grinding deep holes of 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 a threaded hole on the rear housing (11) and into a corresponding side wall hole of the large outer bushing (8) to achieve position limiting and prevent its position from shifting during use.

4. A grinding wheel bar for grinding deep holes of 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 shell (20) and into the corresponding side wall hole of the small outer bushing (25) to achieve position limiting and prevent its position from moving during use.

5. The grinding wheel bar for grinding deep holes of 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 shell (20) and into the corresponding side wall hole of the small outer bushing (25) to achieve position limiting and prevent its position from moving during use.

6. A grinding wheel bar for grinding deep holes of rotating parts according to claim 1, 2 or 5, characterized in that: Assemble the right end of the small flange (15) on the left end step 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 surface of the rear housing (11), install the bolts (14) respectively, and tighten them.

7. The grinding wheel rod for grinding deep holes of rotating parts according to claim 3, characterized in that: Assemble the right end of the small flange (15) on the left end step 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 surface of the rear housing (11), install the bolts (14) respectively, and tighten them.

8. The grinding wheel bar for grinding deep holes of rotating parts according to claim 4, characterized in that: Assemble the right end of the small flange (15) on the left end step 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 surface of the rear housing (11), install the bolts (14) respectively, and tighten them.

9. A grinding wheel bar for grinding deep holes of rotating parts according to claim 1, 2, 5, 7 or 8, characterized in that: When assembling the sliding bushing (16), the relative position between the outer circle depression of the sliding bushing (16) and the circumference of the front housing (20) should be adjusted; at this time, after the assembly is completed, the set screw (17) is screwed on without tightening.

10. A method for using a grinding wheel rod for grinding deep holes of rotating parts according to any one of claims 1 to 20, characterized in that: Here are the steps: (1) Assemble the assembled driving claw (2) of the deep hole grinding wheel rod for aviation parts on the grinding wheel spindle of the grinding machine, and fasten the large flange (5) and the flange of the grinding wheel spindle box of the grinding machine by bolts; install the grinding wheel seat (29) from the left end of the front spindle (21); insert the gasket A (30) into the step circle of the grinding wheel seat (29); then insert the grinding wheel (31) into the step circle of the grinding wheel seat (29); insert the gasket B (32) into the step circle of the grinding wheel seat (29); then insert the washer C (33) into the step circle of the grinding wheel seat (29); then screw a thin nut (34) on the left end threaded part of the front spindle (21) and tighten it; finally screw another thin nut (34) and tighten it; (2) starting the grinding wheel spindle of the grinding machine, and through the device, the grinding wheel (31) is driven by the grinding wheel spindle to start rotating, idling for a certain period of time, observing the state of the grinding wheel and the working state of the deep hole grinding wheel rod for aviation parts, and after the grinding wheel is stable, trimming the outer circle of the grinding wheel with a diamond pen; (3) After clamping and aligning the parts to be ground, set the parameters and start deep hole grinding.

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