Spherical surface polishing and grinding tool for rotor dynamic balance hole SR

Abstract

The utility model relates to the technical field of polishing and grinding machining, in particular to a polishing and grinding tool for a rotor dynamic balance hole SR spherical surface. In order to solve the problems that when a universal drill is used for machining a dynamic balance hole, the quality of the bottom face of an SR ball cannot meet the use requirement after the dynamic balance hole is machined due to the influence of the structural characteristics and precision of a drilling machine, an abrasive belt is fixed to the front end of a grinding head, the tail end of the grinding head is connected with a grinding head connecting rod, and a bearing is arranged outside the connecting rod in a sleeving mode and connected with the connecting rod in a sliding mode; the threaded ring is fixed outside the bearing, threads are arranged on the outer wall of the threaded ring, the rotary file is connected with the rear portion of the grinding head connecting rod and sleeved with the clamping ring, an opening in one end of the clamping ring is connected through a screw and used for tightening the clamping ring, and two supporting lugs are symmetrically arranged at the other end of the clamping ring. The adjusting end of the sliding limiting device is arranged in the gap between the two supporting lugs, one supporting lug is in threaded connection with a jackscrew to abut against the adjusting end of the sliding limiting device, and by means of the tool of the scheme, the ball bottom face of the upper dynamic balance hole SR can meet the drawing requirement.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of polishing and grinding, and particularly relates to a SR spherical surface polishing and grinding tool for a rotor dynamic balance hole. BACKGROUND

[0002] In order to ensure the stability of operation, a plurality of dynamic balance holes are processed at different positions of a rotor of a steam turbine product nuclear power, a balance plug is installed in the dynamic balance holes during a dynamic balance test, and the stability of the rotor is ensured. SUMMARY

[0003] The application provides a SR spherical surface polishing and grinding tool for a rotor dynamic balance hole.

[0004] The application aims to solve the problem that the quality of the SR spherical bottom surface of the dynamic balance hole processed by the universal drill cannot meet the use requirement due to the influence of the structural features and precision of the drill press.

[0005] The front end of the grinding head is fixed with the sand belt, the tail end of the grinding head is connected with the grinding head connecting rod, the bearing is sleeved on the outside of the connecting rod and is connected with the connecting rod in sliding mode, the threaded ring is fixed on the outside of the bearing, the outer wall of the threaded ring is provided with threads, the rotary file is connected with the rear part of the grinding head connecting rod, the snap ring is sleeved on the outside of the rotary file, the opening at one end of the snap ring is connected with the screw for tightening the snap ring, two supporting ears are symmetrically arranged at the other end of the snap ring, the adjusting end of the sliding limiting device is arranged in the gap between the two supporting ears, and the sliding limiting device can be adjusted in position in the gap between the two supporting ears, a jackscrew is threadedly connected to one of the supporting ears and is used for jacking the adjusting end of the sliding limiting device to fix the adjusting end, and the limiting pointer of the sliding limiting device is directed to the rear side of the threaded ring.

[0006] Further, the front end of the grinding head is fixed with the sand belt through the locking screw.

[0007] Further, the tail end of the grinding head is threadedly connected with the grinding head connecting rod.

[0008] Further, the cooperation gap between the bearing and the connecting rod is 0.1mm-0.15mm.

[0009] Further, the threaded ring is in interference fit with the bearing.

[0010] Further, one of the supporting ears of the snap ring is marked with a scale line.

[0011] Advantages:

[0012] The present scheme will be put into one of the dynamic balance hole, pull the rotary file, the bottom of the sandpaper and will be polished SR spherical surface to leave a certain safety distance, start the rotary file rotation, while the bench worker hand feeding grinding, when the piece pointer contact piece end face stop grinding, the piece from the dynamic balance hole, observe the SR ball bottom surface polishing state, such as state is not ideal can be appropriately deepened polishing, meet the drawing requirements, the piece is rotated out, into the next dynamic balance hole polishing, until all the dynamic balance polishing, through the above polishing tool and method, the dynamic balance hole SR ball bottom surface can meet the drawing requirements. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of a rotor dynamic balance hole SR surface polishing tool of the present application;

[0014] Figure 2 is a working state schematic diagram of a rotor dynamic balance hole SR surface polishing tool of the present application;

[0015] Figure 3 is a schematic diagram of a clasp ring of the present application;

[0016] Figure 4 is a side view of the present application Figure 3 .

[0017] In the figure: 1 - locking screw; 2 - grinding head; 3 - grinding head connecting rod; 4 - threaded ring; 5 - bearing; 6 - screw; 7 - abrasive belt; 8 - sliding limiting device; 9 - clasp ring; 10 - rotary file; 11 - top wire. DETAILED DESCRIPTION

[0018] Specific implementation one: a rotor dynamic balance hole SR surface polishing tool, it includes grinding head 2, grinding head connecting rod 3, threaded ring 4, bearing 5, screw 6, abrasive belt 7, sliding limiting device 8, clasp ring 9 and rotary file 10;

[0019] The abrasive belt 7 is fixed at the front end of the grinding head 2, the grinding head 2 is connected with the grinding head connecting rod 3 at the end, the bearing 5 is sleeved on the outside of the connecting rod 3 and is connected with the connecting rod 3 in sliding mode, the threaded ring 4 is fixed on the outside of the bearing 5, the outer wall of the threaded ring 4 is provided with threads, the rotary file 10 is connected with the rear part of the grinding head connecting rod 3, the clamping ring 9 is sleeved on the outside of the rotary file 10, the opening at one end of the clamping ring 9 is connected with the screw 6 for tightening the clamping ring 9, the other end of the clamping ring 9 is symmetrically provided with two supporting ears, the adjusting end of the sliding limiting device 8 is arranged in the gap between the two supporting ears, and the sliding limiting device 8 can adjust the position in the gap between the two supporting ears, and the threaded screw 11 is screwed on one of the supporting ears for tightly pressing the adjusting end of the sliding limiting device 8 to fix the adjusting end, and the limiting pointer of the sliding limiting device 8 is directed to the rear side of the threaded ring 4.

[0020] In the embodiment: the position of the sliding limiting device on the clamping ring can be adjusted, the pointer of the sliding limiting device is guaranteed to touch the end face of the threaded ring after abrasive belt grinding meets the requirements of the drawing (the depth can be 0.05 deeper than the drawing), the locking screw is locked, the abrasive belt is folded and formed by sandpaper and is installed in the grinding head, and the threaded ring is screwed into the dynamic balance hole, the rotary file is clamped with the grinding head connecting rod, and at this time, the tool installation is completed.

[0021] Specific embodiment two: a tool for SR spherical surface grinding of a rotor dynamic balance hole, the abrasive belt 7 is fixed at the front end of the grinding head 2 through the locking screw 1.

[0022] In the embodiment: the front end of the grinding head is fixed by the locking screw 1, the connection is simple and stable.

[0023] Other embodiments are the same as the specific embodiment one.

[0024] Specific embodiment three: a tool for SR spherical surface grinding of a rotor dynamic balance hole, the grinding head 2 is threadedly connected with the grinding head connecting rod 3 at the end.

[0025] In the embodiment: the end of the grinding head is threadedly connected with the grinding head connecting rod, the connection is simple and stable.

[0026] Other embodiments are the same as the specific embodiment one.

[0027] Specific embodiment four: a tool for SR spherical surface grinding of a rotor dynamic balance hole, the cooperation gap between the bearing 5 and the connecting rod 3 is 0.1mm-0.15mm.

[0028] In the embodiment: the cooperation gap between the bearing and the connecting rod is 0.1mm-0.15mm, which guarantees that the connecting rod can slide along the bearing.

[0029] Other embodiments are the same as the specific embodiment one.

[0030] Specific implementation five: a rotor dynamic balance hole SR spherical polishing and grinding tool, the threaded ring 4 and the bearing 5 interference fit.

[0031] In this embodiment: threaded ring and bearing interference fit, connection stable and simple.

[0032] Other embodiments are the same as specific implementation one.

[0033] Specific implementation six: a rotor dynamic balance hole SR spherical polishing and grinding tool, one of the ears of the clasp 9 is marked with a scale line.

[0034] In this embodiment: one of the ears of the clasp is marked with a scale line, which is used to determine that the pointer of the sliding limiting device touches the end face of the threaded ring after the abrasive belt grinding meets the requirements of the drawing (the depth can be 0.05 deeper than the drawing).

[0035] Other embodiments are the same as specific implementation one.

[0036] Working process:

[0037] Adjust the position relationship of the sliding limiting device on the clasp to ensure that the pointer of the sliding limiting device touches the end face of the threaded ring after the abrasive belt grinding meets the requirements of the drawing (the depth can be 0.05 deeper than the drawing), lock the top screw; fold the sandpaper into the grinding head and tighten it with the locking screw, screw the external threads of the threaded ring into the dynamic balance hole, clamp the rotating file and the grinding head connecting rod, at this time the tool installation is completed;

[0038] There are 3 circles of 48 holes in the rotor dynamic balance hole, according to the above method, the polishing and grinding tool is installed in one of the dynamic balance holes, the rotating file is pulled out, the bottom sandpaper is kept a certain safety distance from the SR spherical surface to be polished and ground, the rotating file is started to rotate, and the mechanic holds the feed to grind, when the pointer of the sliding limiting device touches the end face of the threaded ring, the grinding is stopped, the threaded ring is rotated out of the dynamic balance hole, the polishing state of the SR spherical bottom surface is observed, if the state is not ideal, the polishing can be appropriately deepened, after meeting the requirements of the drawing, the threaded ring is rotated out, and the next dynamic balance hole is entered for polishing, until all the dynamic balance polishing is completed, through the above polishing and grinding tool and method, the SR spherical bottom surface of the dynamic balance hole can meet the requirements of the drawing.

Claims

1. A rotor dynamic balancing hole SR spherical polishing and grinding tool, characterized by: It comprises a grinding head (2), a grinding head connecting rod (3), a threaded ring (4), a bearing (5), a screw (6), a sand belt (7), a sliding limiting device (8), a snap ring (9) and a rotary file (10); The sand belt (7) is fixed at the front end of the grinding head (2), the grinding head (2) is connected with the grinding head connecting rod (3) at the end, the bearing (5) is sleeved on the outside of the connecting rod (3) and is connected with it in sliding mode, the threaded ring (4) is fixed on the outside of the bearing (5), the outer wall of the threaded ring (4) is provided with threads, the rotary file (10) is connected with the rear part of the grinding head connecting rod (3), the snap ring (9) is sleeved on the outside of the rotary file (10), the opening at one end of the snap ring (9) is connected with the screw (6) for tightening the snap ring (9), two supporting ears are symmetrically arranged at the other end of the snap ring (9), the adjusting end of the sliding limiting device (8) is arranged in the gap between the two supporting ears, and the sliding limiting device (8) can be adjusted in position in the gap between the two supporting ears, a jackscrew (11) is threadedly connected with one of the supporting ears for jacking the adjusting end of the sliding limiting device (8) to fix it, and the limiting pointer of the sliding limiting device (8) faces the rear side of the threaded ring (4).

2. A work fixture for SR spherical lapping of rotor dynamic balancing hole according to claim 1, characterized in that: The sand belt (7) is fixed at the front end of the grinding head (2) through the locking screw (1).

3. A work fixture for SR spherical lapping of rotor dynamic balancing hole according to claim 1, characterized in that: The grinding head (2) is threadedly connected with the grinding head connecting rod (3) at the end.

4. A work fixture for SR spherical lapping of rotor dynamic balancing hole according to claim 1, characterized in that: The cooperation gap between the bearing (5) and the connecting rod (3) is 0.1mm-0.15mm.

5. A work fixture for SR spherical lapping of rotor dynamic balancing hole according to claim 1, characterized in that: The threaded ring (4) is in interference fit with the bearing (5).

6. A work fixture for SR spherical lapping of rotor dynamic balancing hole according to claim 1, characterized in that: One of the supporting ears of the snap ring (9) is marked with a scale line.

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