CN216325194U - Rapid centering support tool for rotating main shaft and inner and outer circles of workpiece - Google Patents

Abstract

The utility model relates to a quick centering support tool for a rotating main shaft and the inner and outer circles of a workpiece, which comprises a multi-jaw chuck, a bearing and a copper sleeve, the multi-jaw chuck comprises a clamp disc with a middle inner hole, at least three jaws arranged on the clamp disc and an adjusting mechanism for adjusting the jaws to move along the radial direction of the clamp disc, the clamping jaws are provided with inner positioning structures or outer positioning structures, the inner positioning structures are used for abutting against the inner circle of a workpiece, and the inner positioning structures of all the clamping jaws form an inner positioning circle, the outer positioning structure is used for clamping on the outer circle of the workpiece, the outer positioning structures of all the clamping jaws form an outer positioning circle, the bearing is fixedly arranged on the end face of the clamp disc, and the axis of the bearing is positioned on the axis of the inner positioning circle or the axis of the outer positioning circle, the copper sleeve is coaxially arranged in the bearing, the copper sleeve is used for inserting the rotating main shaft, and the copper sleeve and the rotating main shaft are in clearance fit.

Description

Rapid centering support tool for rotating main shaft and inner and outer circles of workpiece

Technical Field

The utility model relates to the field of machining, in particular to a quick centering support tool for a rotating main shaft and an inner circle and an outer circle of a workpiece.

Background

In the field repair process of the valve seat sealing surface of the steam turbine valve, the axis of the main shaft of the valve boring device needs to be adjusted to be consistent with the axis of the inner circle of the valve shell, and then the valve boring device is processed. During adjustment equipment, first-selected instrument through looking for ensures that the boring equipment main shaft is located valve casing internal circle axis, then in the course of working, adopts the supporting tool to support the boring equipment main shaft, ensures that it is located valve casing internal circle axis all the time in rotatory course of working. The centering time of the centering fixture influences the processing efficiency, in the existing design, the speed of a common centering tool is lower, the working efficiency is lower, a large lifting space is provided, tools for supporting a spindle of the boring equipment are a plurality of adjusting supporting feet, the tools need to be adjusted independently, and the centering fixture is complex and lower in working efficiency.

SUMMERY OF THE UTILITY MODEL

In view of the above disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a support tool for fast centering of a rotating spindle and an inner and outer circle of a workpiece, which can realize fast positioning and centering of the rotating spindle and the inner and outer circle of the workpiece, and can stably support the rotating spindle, and is convenient and flexible to operate, and time-saving and labor-saving.

In order to achieve the purpose, the utility model provides a quick centering support tool for a rotating main shaft and inner and outer circles of a workpiece, which comprises a multi-jaw chuck, a bearing and a copper sleeve, wherein the multi-jaw chuck comprises a clamp disc with a middle inner hole, at least three jaws arranged on the clamp disc and an adjusting mechanism for adjusting the jaws to move along the radial direction of the clamp disc, the jaws are provided with inner positioning structures or outer positioning structures, the inner positioning structures are used for abutting against the inner circle of the workpiece and forming an inner positioning circle by the inner positioning structures of all the jaws, the outer positioning structures are used for clamping on the outer circle of the workpiece and forming an outer positioning circle by the outer positioning structures of all the jaws, the bearing is fixedly arranged on the end face of the clamp disc, the axis of the bearing is positioned on the axis of the inner positioning circle or the axis of the outer positioning circle, the copper sleeve is coaxially arranged in the bearing, and the inner holes of the copper sleeve and the clamp disc are kept opposite, the copper bush is used for inserting the rotating main shaft, and the copper bush and the rotating main shaft are in clearance fit.

Furthermore, the clamping jaw is simultaneously provided with an inner positioning structure and an outer positioning structure, and the inner positioning circle and the outer positioning circle are coaxial.

Further, the bearing is a self-aligning bearing.

Further, the fixture comprises an annular end cover fixedly connected with the end face of the fixture disc, the annular end cover is pressed on the end portion of the bearing to fix the bearing on the fixture disc, an inner hole is formed in the middle of the annular end cover, and the inner hole is aligned with the copper sleeve, so that the rotating main shaft can smoothly extend into the copper sleeve through the inner hole in the middle of the annular end cover.

Furthermore, a circular groove is formed in the end face of the clamp disc, and one end of the bearing is embedded into the circular groove.

Furthermore, a chip blocking ring plate is embedded on the inner hole wall of the annular end cover.

Further, copper sheathing one end is equipped with convex outer fringe portion, and the outer fringe portion top leans on in bearing one end, still including the fixed circlip that cup joints and imbeds on the copper sheathing, circlip supports and leans on the other end at the bearing.

Furthermore, the adjusting mechanism of the multi-jaw chuck comprises an adjusting bolt arranged in the peripheral wall of the clamp disc and an intermediate transmission structure for connecting the adjusting bolt and the jaws, and the jaws are driven to open or close through the intermediate transmission structure when the adjusting bolt rotates.

As mentioned above, the quick centering support tool provided by the utility model has the following beneficial effects:

through setting up the multi-jaw chuck, bearing and copper sheathing, during the use, will look for fast and support the frock and put in interior circle, the jack catch through adjusting the multi-jaw chuck opens to interior location calotte and props in the work piece circle this moment, because the axle center of bearing and copper sheathing coincides with interior location circle axle center, therefore the axle center of copper sheathing just in time is located interior circle axle center, the size of copper sheathing is confirmed according to the rotation main shaft, after the rotation main shaft inserts in the copper sheathing, can make the rotation main shaft be located interior circle axle center, thereby realize the location of looking for in rotation main shaft and the work piece circle, and the rotation main shaft is in the spin work in-process, select to rotate through the bearing, it plays the support location effect to support the rotation main shaft to look for fast, ensure that the rotation main shaft can be in interior circle stable spinning. When the rotary main shaft and the outer circle of the workpiece are centered and positioned, the outer positioning circle of the clamping jaw is clamped on the outer circle of the workpiece, and the rest working processes and principles are the same as those in the inner circle of the workpiece. And because the copper sheathing material is softer to have certain wearability, make things convenient for rotatory main shaft to insert and rotate, improve the wearability of frock. The quick centering support tool disclosed by the utility model can realize quick positioning and centering of the rotating main shaft and the inner circle and the outer circle of the workpiece, can stably support the rotating main shaft, is convenient and flexible to operate, saves time and labor and simplifies the device.

Drawings

Fig. 1 is a schematic structural view of the support tool for quick centering according to the present invention.

Fig. 2 is a sectional view of the quick centering support tool of the present invention.

Fig. 3 is an installation diagram of the quick centering support tool in the inner circle according to the present invention.

Fig. 4 is a schematic working diagram of the supporting tool for fast centering supporting a rotating spindle according to the present invention.

Description of the element reference numerals

1 Multi-jaw chuck

11 clamping disc

12 claw

12a inner positioning structure

12b external positioning structure

13 adjusting bolt

2 annular end cover

3 connecting bolt

4 bearing

5 copper sleeve

6 elastic retainer ring

7 chip blocking ring plate

8 valve casing

81 valve seat

9 rotating spindle

91 center shaft

92 radial feed assembly

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1 to 4, the utility model provides a quick centering support tool for a rotating spindle and an inner circle and an outer circle of a workpiece, comprising a multi-jaw chuck 1, a bearing 4 and a copper sleeve 5, wherein the multi-jaw chuck 1 comprises a clamp disc 11 with a middle inner hole, at least three jaws 12 arranged on the clamp disc 11 and an adjusting mechanism for adjusting the jaws 12 to move along the radial direction of the clamp disc 11, the jaws 12 are provided with inner positioning structures 12a and/or outer positioning structures 12b, the inner positioning structures 12a are used for abutting against the inner circle of the workpiece, the inner positioning structures 12a of all the jaws 12 form an inner positioning circle, the outer positioning structures 12b are used for clamping on the outer circle of the workpiece, the outer positioning structures 12b of all the jaws 12 form an outer positioning circle, and the inner positioning circle and the outer positioning circle are coaxial by simultaneously having the inner positioning structures 12a and the outer positioning structures 12b, the bearing 4 is fixedly arranged on the end face of the clamp disc 11, and the axis of the bearing 4 is positioned on the axis of the inner positioning circle or the axis of the outer positioning circle, the copper sleeve 5 is coaxially arranged in the bearing 4, the inner holes of the copper sleeve 5 and the clamp disc 11 are kept opposite, the copper sleeve 5 is used for inserting the rotating main shaft 9, and the copper sleeve and the rotating main shaft are in clearance fit. The middle inner holes of the copper sleeve 5 and the clamp disc 11 are kept aligned, and the rotary spindle 9 can penetrate through the copper sleeve 5 and extend into the middle inner hole of the clamp disc 11 when being inserted for a long time, so that the insertion of the rotary spindle 9 is not influenced.

The multi-jaw chuck 1 can be a conventional universal machine tool accessory, has self-centering and clamping functions, is provided with three jaws 12, see fig. 1, and can be more than three jaws, and all the jaws 12 are adjusted by an adjusting mechanism to synchronously move along the radial direction of the clamp disc 11, so that the jaws 12 are opened or closed. When the centering positioning device is used for centering and positioning the inner circle of a workpiece, the clamping jaws 12 are provided with the inner positioning structures 12a, and the three clamping jaws 12 abut against the wall of the inner circle through the inner positioning structures 12a when being opened, so that the clamping jaws are supported in the inner circle of the workpiece to perform automatic centering. When the centering positioning device is used for centering and positioning the excircle of a workpiece, the clamping jaw 12 is provided with the outer positioning structure 12b, and the outer positioning structure 12b is clamped on the outer circular wall to perform automatic centering. The inner positioning structure 12a and the outer positioning structure 12b may be positioning points, positioning lines, or positioning point arc structures.

The basic working principle of the quick centering support tool provided by the utility model is as follows: when the centering device is used, referring to fig. 3 and 4, the quick centering support tool is placed in the inner circle, at the moment, the jaws 12 of the multi-jaw chuck 1 are adjusted to be opened to the inner positioning dome to be supported in the inner circle of a workpiece, the axis of the copper sleeve 5 is just positioned on the axis of the inner circle due to the fact that the axes of the bearing 4 and the copper sleeve 5 are overlapped with the axis of the inner positioning circle, the size of the copper sleeve 5 is determined according to the size of the rotating main shaft 9, the rotating main shaft 9 of equipment (such as boring equipment) is inserted into the copper sleeve 5 and can extend into the copper sleeve, the rotating main shaft 9 can be positioned on the axis of the inner circle, centering and positioning of the rotating main shaft 9 in the inner circle are achieved, the rotating main shaft 9 rotates through the bearing 4 in the rotating working process, and the quick centering support tool plays a role in supporting and positioning for the rotating main shaft 9, and ensures that the rotating main shaft 9 can stably rotate in the inner circle. When the rotary spindle 9 is centered and positioned with the outer circle of the workpiece, the outer positioning circle of the clamping jaw 12 is clamped on the outer circle of the workpiece, and the rest of working processes and principles are the same as those in the inner circle of the workpiece. And because the copper sheathing 5 material is softer to have certain wearability, make things convenient for rotatory main shaft 9 to insert and rotate, improve the wearability of frock. The quick centering support tool disclosed by the utility model can realize quick positioning and centering of the rotating main shaft 9 and the inner circle and the outer circle of a workpiece, can stably support the rotating main shaft, is convenient and flexible to operate, saves time and labor and simplifies the device.

Referring to fig. 1 to 4, the present invention is further illustrated in a specific embodiment as follows:

in the embodiment, referring to fig. 1 and 2, the claw 12 is provided with an inner positioning structure 12a and an outer positioning structure 12b at the same time, and the inner positioning circle and the outer positioning circle are coaxial, so that the inner positioning structure and the outer positioning structure can be used for centering and positioning the rotating main shaft and the inner circle and the outer circle of the workpiece at the same time.

In the present embodiment, referring to fig. 1 and fig. 2, as a preferred design, the bearing 4 is a self-aligning bearing, which has self-aligning performance and can be automatically adjusted when the shaft is deflected, without increasing the load of the bearing 4. Specifically, under some circumstances, when the inner circular wall has a small inclination, after the support tool is positioned in the inner circle through quick centering, a small included angle exists between the axis of the inner positioning circle of the three claws 12 and the axis of the inner circle at the moment, that is, a certain inclination occurs in the inner circle by the support tool in quick centering, and by having the self-aligning bearing with the self-aligning function, the axis of the copper bush 5 can be ensured to be parallel to the axis of the inner circle (at the moment, the axis of the copper bush 5 and the axis of the inner circle may have a certain distance deviation, and the small deviation does not affect the rotation processing of the rotating spindle 9), so that the smooth rotation work of the rotating spindle 9 is ensured, and the phenomenon of blocking cannot occur smoothly in the axial movement.

In this embodiment, referring to fig. 1 and 2, as an optimal design, a circular groove is formed in the end surface of the clamp plate 11, the circular groove and an inner positioning circle of the three jaws 12 are processed in the same process, the coaxiality is ensured, and one end of the self-aligning bearing is embedded in the circular groove, so that the installation and the positioning are convenient. Support frock still includes annular end cover 2 in finding the fast, and annular end cover 2 passes through connecting bolt 3 and 11 terminal surface fixed connection of anchor clamps dish, and annular end cover 2 presses 4 other tip of bearing to fix bearing 4 on anchor clamps dish 11, have the hole in the middle of the annular end cover 2, and this hole keeps aligning with copper sheathing 5, and rotatory main shaft 9 can insert smoothly in the copper sheathing 5 through the hole in the middle of annular end cover 2 like this. Furthermore, a chip blocking ring plate 7 is embedded on the inner hole wall of the annular end cover 2, when a rotating main shaft 9 of the boring device extends into the tool, the chip blocking ring plate 7 is sleeved in the rotating main shaft 9, and the chip blocking ring plate 7 is used for blocking chips generated during machining from entering the quick centering support tool to play a role in protection. Of course, in other embodiments, the bearing 4 may be fixed in other suitable manners known in the art.

In this embodiment, referring to fig. 1 and fig. 2, as a preferred design, one end of the copper sleeve 5 is provided with a convex outer edge, and the outer edge abuts against one end of the bearing 4, and the copper sleeve further comprises a circlip 6 fixedly sleeved and embedded on the copper sleeve 5, and the circlip 6 abuts against the other end of the bearing 4, so that the copper sleeve 5 is installed in the bearing 4, and the installation is convenient.

Referring to fig. 1 and 2, in the multi-jaw chuck 1 adopted in the present embodiment, the adjusting mechanism includes an adjusting bolt 13 disposed in the outer peripheral wall of the chuck plate 11 and an intermediate transmission structure connecting the adjusting bolt 13 and the jaws 12, the adjusting bolt 13 drives the jaws 12 to move radially through the intermediate transmission structure when rotating, so as to open or close, specifically, the adjusting bolt 13 adopts an outer hexagon screw, the front end of which is machined into a square column to be inserted into the chuck plate 11, and can be adjusted by an open end wrench, so as to facilitate operation in a narrow space. In addition, the jaw 12 is also provided with an outer positioning structure 12b for clamping on the outer circle, and the three outer positioning structures 12b form an outer positioning circle, for the cylindrical structure, the inner positioning structure 12a can be abutted against the inner circle, and the jaw 12 can also be clamped on the outer circle to realize positioning.

Referring to fig. 3 and fig. 4, the following describes a working process of the quick centering support tool in this embodiment with a specific use example: in the field repairing process of the sealing surface of the valve seat 81 of the steam turbine valve, the rotating main shaft 9 line of the boring device needs to be adjusted to be consistent with the inner circle axis of the valve shell 8 of the valve seat 81, then machining is carried out, referring to fig. 4, the front end of the rotating main shaft 9 is provided with a central shaft 91 extending out, the power head part of the boring device is irrelevant to the patent, and therefore the radial feeding assembly 92 is not shown, and can drive the rotating main shaft 9 to move radially, and the position of the rotating main shaft is convenient to adjust. During the use, earlier with quick centering support frock fill in disk seat 81 interior circle, then screw the outer hexagon screw on the multi-jaw chuck 1, the adjustment jack catch 12 opens to interior location structure 12a and supports and lean on in the disk seat 81 interior circle, realizes quick location and presss from both sides tightly. Then, penetrate the center pin 91 of the rotating main shaft 9 in the copper bush 5 of the quick centering support tool, then center according to the inner circle of the valve port through the dial indicator sucked on the rotating main shaft 9, namely the axis of the rotating main shaft 9 is consistent with the axis of the inner circle of the valve shell 8, then the boring tool is carried out, the rotating main shaft 9 can rotate smoothly in the quick centering support tool, the supporting function is achieved, and the rotating main shaft 9 is ensured to be always kept on the inner circle axis.

It should be pointed out that it is only one of them typical application scene of this patent to look for the center of circle in the disk seat 81 fast above, and the support frock can also be used for multiple similar scenes in looking for fast, for example, when processing the interior circle of pipeline or groove, will look for fast to support the frock and prop on the pipeline inner wall in looking for, install the boring bar on the magnetic drill main shaft, during penetrating the copper sheathing 5 that supports the frock in looking for fast with the boring bar, process. In addition, for quickly finding the center of the excircle of the workpiece, the outer positioning structure 12b of the clamping jaw 12 is only required to be clamped on the excircle of the workpiece.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (8)

1. The utility model provides a support frock in looking for fast that is used for rotatory main shaft and work piece excircle, its characterized in that: the multi-jaw chuck comprises a multi-jaw chuck (1), a bearing (4) and a copper sleeve (5), wherein the multi-jaw chuck (1) comprises a clamp disc (11) with a middle inner hole, at least three clamping jaws (12) installed on the clamp disc (11) and an adjusting mechanism for adjusting the clamping jaws (12) to move along the radial direction of the clamp disc (11), an inner positioning structure (12a) or an outer positioning structure (12b) is arranged on each clamping jaw (12), the inner positioning structure (12a) is used for abutting against the inner circle of a workpiece, the inner positioning structures (12a) of all the clamping jaws (12) form an inner positioning circle, the outer positioning structure (12b) is used for clamping on an outer circle of the workpiece, the outer positioning structures (12b) of all the clamping jaws (12) form an outer positioning circle, the bearing (4) is fixedly installed on the clamp disc (11), and the axis of the bearing (4) is located on the axis of the inner positioning circle or the outer positioning circle, the copper sleeve (5) is coaxially arranged in the bearing (4), the copper sleeve (5) is used for inserting the rotating main shaft (9), and the copper sleeve and the rotating main shaft are in clearance fit.

2. The quick centering support tool according to claim 1, characterized in that: the claw (12) is simultaneously provided with an inner positioning structure (12a) and an outer positioning structure (12b), and the inner positioning circle and the outer positioning circle are coaxial.

3. The quick centering support tool according to claim 1, characterized in that: the bearing (4) is a self-aligning bearing.

4. The quick centering support tool according to claim 1, characterized in that: the fixture comprises an annular end cover (2) fixedly connected with the end face of a fixture disc (11), wherein the annular end cover (2) is pressed against the end part of a bearing (4) and fixes the bearing (4) on the fixture disc (11), an inner hole is formed in the middle of the annular end cover (2), and the inner hole is kept aligned with a copper sleeve (5).

5. The quick centering support tool according to claim 1 or 4, wherein: the end face of the clamp disc (11) is provided with a circular groove, and one end of the bearing (4) is embedded into the circular groove.

6. The quick centering support tool according to claim 4, characterized in that: and a scrap blocking ring plate (7) is embedded on the inner hole wall of the annular end cover (2).

7. The quick centering support tool according to claim 1, characterized in that: copper sheathing (5) one end is equipped with convex outer fringe portion, and outer fringe portion top leans on in bearing (4) one end, still including fixed circlip (6) that cup joints and imbeds on copper sheathing (5), circlip (6) support by the other end at bearing (4).

8. The quick centering support tool according to claim 1, characterized in that: the adjusting mechanism of the multi-jaw chuck (1) comprises an adjusting bolt (13) arranged in the outer peripheral wall of the clamp disc (11) and an intermediate transmission structure for connecting the adjusting bolt (13) and the clamping jaws (12), and the clamping jaws (12) are driven to open or close through the intermediate transmission structure when the adjusting bolt (13) rotates.

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