CN108031880B - Wedge internal expansion type centering device and centering method - Google Patents
Wedge internal expansion type centering device and centering method Download PDFInfo
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- CN108031880B CN108031880B CN201711059685.7A CN201711059685A CN108031880B CN 108031880 B CN108031880 B CN 108031880B CN 201711059685 A CN201711059685 A CN 201711059685A CN 108031880 B CN108031880 B CN 108031880B
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- telescopic positioning
- taper sleeve
- movable taper
- cover plate
- centering device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/404—Gripping the work or tool by jaws moving radially controlled by conical surfaces
Abstract
The invention relates to the technical field of machinery, in particular to a wedge internal expansion type centering device which comprises a cover plate, an upper movable taper sleeve, an upper connecting disc, a screw rod, a middle connecting frame, a lower supporting frame, a lower movable taper sleeve and a telescopic positioning claw, wherein the upper connecting disc is arranged on the upper connecting frame; the cover plate comprises an upper cover plate, an inner cover plate and a lower cover plate; the upper coupling plate, the middle coupling frame and the lower support frame are connected with each other through bolts and screws from top to bottom along the vertical direction to form a cavity; the upper movable taper sleeve, the screw rod and the lower movable taper sleeve are sequentially connected from top to bottom along the vertical direction; the upper part of the upper movable taper sleeve is connected with the upper cover plate; the lower part of the upper movable taper sleeve is connected with the inner cover plate to form a clamping groove; the upper end of the screw rod is in a convex shape and is arranged in the clamping groove; the invention has simple structural design and easy operation, expands the application range of the expansion sleeve type positioning device, is suitable for processing various workpieces to be processed with inner hole positioning, and has low requirement on the precision of the inner hole of the workpiece to be processed.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a wedge internal expansion type centering device and a centering method.
Background
At present, when a workpiece with an inner hole as a positioning reference is machined, an expansion sleeve type positioning device is generally adopted, and the principle of the expansion sleeve type positioning device is that a bolt is rotated to enable a pressing plate to press an expansion sleeve downwards and expand the expansion sleeve outwards, so that the inner hole of the workpiece is tightly supported, and accurate positioning is achieved. The expansion sleeve is uniformly expanded outwards, so the positioning mode is very suitable for positioning a workpiece with a finish-machined inner hole, the roundness and the cylindricity of the finish-machined inner hole are good, the precision is high, meanwhile, the excircle of the expansion sleeve is processed by a grinding machine, the roundness and the cylindricity are good, and the diameter size of the excircle of the expansion sleeve is the same as that of the positioning inner hole of the workpiece, so when the expansion sleeve is expanded outwards, the excircle surface of the expansion sleeve can be in good contact with the inner surface of the inner hole, and the central axis of the inner hole of the workpiece can be ensured to be coincident with the central axis of the positioning device. First, when the roundness of the inner hole of the workpiece is not ideal, the outer surface of the expansion sleeve cannot be in good contact with the inner surface of the inner hole of the workpiece when the expansion sleeve expands outwards, and a gap is generated; second, when the cylindricity of the hole is not ideal, there is also a tight hold at one end of the hole and no contact at the other end, both of which can cause the workpiece to move during machining. Therefore, the expanding sleeve type positioning device has higher requirement on the precision of positioning the inner hole and is not suitable for positioning a workpiece with unsatisfactory inner hole precision.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the wedge internal expanding centering device is suitable for finish machining of an inner hole and an inner hole with unsatisfactory performance, and a method for machining a workpiece by using the wedge internal expanding centering device is also provided.
In order to solve the technical problems, the invention adopts the technical scheme that: a wedge internal expansion type centering device comprises a cover plate, an upper movable taper sleeve, an upper connecting disc, a screw rod, a middle connecting frame, a lower supporting frame, a lower movable taper sleeve and a telescopic positioning claw;
the cover plate comprises an upper cover plate, an inner cover plate and a lower cover plate; the upper coupling plate, the middle coupling frame and the lower support frame are connected with each other through bolts and screws from top to bottom along the vertical direction to form a cavity;
the upper movable taper sleeve, the screw rod and the lower movable taper sleeve are sequentially connected from top to bottom along the vertical direction; the upper part of the upper movable taper sleeve is connected with the upper cover plate; the lower part of the upper movable taper sleeve is connected with the inner cover plate to form a clamping groove; the upper end of the screw rod is in a convex shape and is arranged in the clamping groove; the lower end of the lower movable taper sleeve is connected with the lower cover plate;
the upper movable taper sleeve, the inner cover plate, the screw rod and the lower movable taper sleeve are sleeved in the cavity; the upper movable taper sleeve is connected with the upper connecting disc; the lower movable taper sleeve is connected with the lower support frame;
the telescopic positioning claw comprises an upper telescopic positioning claw and a lower telescopic positioning claw; the upper telescopic positioning claw is connected with the outer surface of the lower part of the upper movable taper sleeve and is arranged between the upper connecting disc and the upper end of the middle connecting frame; the lower telescopic positioning claw is connected with the outer surface of the upper part of the lower movable taper sleeve and is arranged between the lower end of the middle connecting frame and the lower supporting frame; the number of the upper telescopic positioning claws and the number of the lower telescopic positioning claws are respectively three.
Furthermore, a spring and a spring catch pin are arranged between the upper telescopic positioning claw and the lower telescopic positioning claw.
Furthermore, the three upper telescopic positioning claws and the three lower telescopic positioning claws are respectively and uniformly distributed on the circumferential plane where the upper telescopic positioning claws and the lower telescopic positioning claws are located, and the three upper telescopic positioning claws and the three lower telescopic positioning claws are arranged in a staggered mode by 30 degrees.
Furthermore, the number of the upper telescopic positioning claws and the number of the lower telescopic positioning claws can be only three, the extension of the three upper telescopic positioning claws must be synchronous, and the extension of the three lower telescopic positioning claws must be synchronous.
Furthermore, the extension of the three upper telescopic positioning claws and the extension of the three lower telescopic positioning claws cannot be linked.
Furthermore, the upper movable taper sleeve and the upper connecting disc are connected through a key, and the lower movable taper sleeve and the lower support frame are connected through a key.
Furthermore, the middle connecting frame, the upper connecting disc and the lower supporting frame are respectively provided with a positioning pin after being locked.
Further, the lower end of the lower cover plate is also provided with a locknut.
Furthermore, oil cups are arranged between the upper movable taper sleeve and the upper connecting disc, between the lower movable taper sleeve and the lower support frame, and at the upper telescopic positioning claw and the lower telescopic positioning claw.
In order to solve the technical problem, the invention adopts another technical scheme as follows: the wedge internal expanding centering device is the wedge internal expanding centering device, and comprises the following steps:
(1) hoisting the wedge internal expansion type centering device into a machine tool workbench, aligning and fixing;
(2) the method comprises the following steps that a processed workpiece is hung into a wedge internal expansion type centering device, a screw is rotated through a handle, an upper movable taper sleeve and a lower movable taper sleeve are driven to do vertical linear motion, an upper telescopic positioning claw and a lower telescopic positioning claw extend outwards, the processed workpiece is aligned, and finally a locknut is locked;
(3) processing the processed workpiece by a machine tool;
(4) after the machining operation is finished, the locknut is loosened, the screw rod is reversely rotated through the handle, springs and spring stop pins are arranged in the middle of the upper telescopic positioning claw and the lower telescopic positioning claw, the upper telescopic positioning claw and the lower telescopic positioning claw are enabled to contract inwards through the springs arranged inside, and a machined piece is loosened and taken out.
The invention has the beneficial effects that: structural design is simple, high durability and convenient operation, rotate the screw rod through the handle, it is linear motion to drive movable taper sleeve and lower movable taper sleeve in the vertical direction respectively, through the upper and lower linear motion of last movable taper sleeve and lower movable taper sleeve, make three last flexible locating jaw and three lower flexible locating jaw outwards stretch out simultaneously or inwards contract simultaneously, adopt three point location's principle, make last flexible locating jaw and lower flexible locating jaw can the automatic correction by the central axis of processing work piece hole, reach the automatic positioning and the relaxation of being processed the work piece hole. The wedge internal expanding type centering device provided by the invention has the advantages that the application range of the expanding sleeve type positioning device is expanded, the wedge internal expanding type centering device is suitable for processing various processed workpieces positioned in inner holes, and the requirement on the precision of the inner holes of the processed workpieces is not high.
Drawings
FIG. 1 is a schematic structural view of a wedge internal expanding centering device according to an embodiment of the present invention;
FIG. 2 is a top view of a wedge internal expanding centering device according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an upper retractable positioning pawl of the wedge internal expanding centering device according to the embodiment of the present invention;
FIG. 4 is a schematic view of the lower retractable positioning pawl of the wedge internal expanding centering device according to the embodiment of the present invention;
FIG. 5 is a schematic view of the coupling of a wedge internal expanding centering device and a clamp according to an embodiment of the present invention;
description of reference numerals:
1. a cover plate; 111. an upper cover plate; 112. an inner cover plate; 113. a lower cover plate; 2. an upper movable taper sleeve;
3. an upper coupling plate; 4. a screw; 5. a middle connecting frame; 6. a lower support frame; 7. a lower movable taper sleeve; 8. a telescopic positioning claw; 81. an upper telescopic positioning claw; 82. a lower telescopic positioning claw; 9. a spring; 10. a spring catch pin; 11. a key; 12. positioning pins; 13. a locknut; 14. a bolt; 15. a screw; 16. an oil cup; 17. a handle.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: the wedge internal expanding type centering device is designed, a screw rod is rotated through a handle 17, an upper movable taper sleeve and a lower movable taper sleeve are respectively driven to do vertical linear motion, so that three upper telescopic positioning claws and three lower telescopic positioning claws extend outwards or contract inwards at the same time, and the automatic positioning and releasing of an inner hole of a processed workpiece are achieved.
Referring to fig. 1 to 5, a wedge internal expanding centering device includes a cover plate 1, an upper movable taper sleeve 2, an upper coupling plate 3, a screw 4, a middle coupling frame 5, a lower support frame 6, a lower movable taper sleeve 7 and a telescopic positioning claw 8;
the cover plate 1 comprises an upper cover plate 111, an inner cover plate 112 and a lower cover plate 113; the upper coupling plate 3, the middle coupling frame 5 and the lower support frame 6 are connected with each other from top to bottom along the vertical direction through bolts 14 and screws 15 to form a cavity;
the upper movable taper sleeve 2, the screw rod 4 and the lower movable taper sleeve 7 are sequentially connected from top to bottom along the vertical direction; the upper part of the upper movable taper sleeve 2 is connected with an upper cover plate 111; the lower part of the upper movable taper sleeve 2 is connected with the inner cover plate 112 to form a clamping groove; the upper end of the screw rod 4 is in a convex shape and is arranged in the clamping groove; the lower end of the lower movable taper sleeve 7 is connected with a lower cover plate 113;
the upper movable taper sleeve 2, the inner cover plate 112, the screw rod 4 and the lower movable taper sleeve 7 are arranged in the cavity; the upper movable taper sleeve 2 is connected with the upper connecting disc 3; the lower movable taper sleeve 7 is connected with the lower support frame 6;
the telescopic positioning claw 8 comprises an upper telescopic positioning claw 81 and a lower telescopic positioning claw 82; the upper telescopic positioning claw 81 is connected with the outer surface of the lower part of the upper movable taper sleeve 2 and is arranged between the upper connecting disc 3 and the upper end of the middle connecting frame 5; the lower telescopic positioning claw 82 is connected with the outer surface of the upper part of the lower movable taper sleeve 7 and is arranged between the lower end of the middle connecting frame 5 and the lower support frame 6; the number of the upper telescopic positioning claws 81 and the number of the lower telescopic positioning claws 82 are three respectively.
From the above description, the working process of the wedge internal expanding type centering device of the present invention is as follows: when a workpiece to be machined is machined, the screw rod 4 is rotated through the handle 17, the upper movable taper sleeve 2 and the lower movable taper sleeve 7 are respectively driven to do linear motion in the vertical direction, the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 simultaneously extend outwards to lock inner holes of the workpiece to be machined through the vertical linear motion of the upper movable taper sleeve 2 and the lower movable taper sleeve 7, and a machine tool is opened for machining; after the processed workpiece is processed, the machine tool is closed, the screw rod 4 is rotated through the handle 17, the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 simultaneously contract inwards to loosen the inner hole of the processed workpiece through the vertical linear motion of the upper movable taper sleeve 2 and the lower movable taper sleeve 7, and the workpiece is taken out to complete the processing.
From the above description, the wedge internal expanding type centering device of the present invention has the following beneficial effects: structural design is simple, high durability and convenient operation, rotate screw rod 4 through handle 17, it is linear motion to drive activity taper sleeve 2 and lower activity taper sleeve 7 in vertical direction respectively, through the upper and lower linear motion of last activity taper sleeve 2 and lower activity taper sleeve 7, make three last flexible locating jaw 81 and three lower flexible locating jaw 82 outwards stretch out simultaneously or inwards shrink simultaneously, adopt three point location's principle, make the central axis that flexible locating jaw 81 and lower flexible locating jaw 82 can the automatic correction by the processing work piece hole, reach the automatic positioning and the release by the processing work piece hole. The wedge internal expanding type centering device provided by the invention has the advantages that the application range of the expanding sleeve type positioning device is expanded, the wedge internal expanding type centering device is suitable for processing various processed workpieces positioned in inner holes, and the requirement on the precision of the inner holes of the processed workpieces is not high.
Further, a spring 9 and a spring catch pin 10 are provided between the upper and lower telescopic positioning pawls 81 and 82.
As can be seen from the above description, the spring 9 and the spring stop pin 10 are arranged in the middle of the upper telescopic positioning claw 81 or the lower telescopic positioning claw 82, and the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82 can be extended outwards to lock the inner hole of the workpiece to be machined or retracted inwards to release the inner hole of the workpiece to be machined through the action of the spring 9 and the spring stop pin 10.
Further, the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are respectively and uniformly distributed on the circumferential plane, and the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are arranged in a staggered manner by 30 degrees.
As can be seen from the above description, the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are arranged by being staggered by 30 degrees, so that when the roundness of the workpiece to be processed is not good, the telescopic positioning claws 8 can be in contact with the inner hole of the workpiece to be processed in multiple directions, and the central axis of the inner hole of the workpiece to be processed can be better overlapped with the central axis of the wedge internal expanding type centering device.
Further, the number of the upper telescopic positioning claws 81 and the number of the lower telescopic positioning claws 82 are only three, the extension of the three upper telescopic positioning claws 81 must be synchronized, and the extension of the three lower telescopic positioning claws 82 must be synchronized.
As can be seen from the above description, the number of the upper telescopic positioning claws 81 and the lower telescopic positioning claws 82 can only be three, and at the same time, the extension of the three upper telescopic positioning claws 81 must be synchronized, and the extension of the three lower telescopic positioning claws 82 must be synchronized, mainly in order to realize the three-point positioning principle, so that the center line of the workpiece to be processed and the center line of the wedge internal expanding centering device can be automatically corrected to coincide by the synchronous extension of the three upper telescopic positioning claws 81 or the three lower telescopic positioning claws 82.
Further, the extension of the three upper telescopic positioning claws 81 and the extension of the three lower telescopic positioning claws 82 cannot be linked.
It can be known from the above description that the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 can not be linked, that is, only when the three upper telescopic positioning claws 81 are extended in place, the three lower telescopic positioning claws 82 can be extended outwards, or when the three lower telescopic positioning claws 82 are extended in place, the three upper telescopic positioning claws 81 can be extended outwards, and the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are not linked mainly to ensure that the upper telescopic positioning claws 81 and the lower telescopic positioning claws 82 can be contacted with the inner hole of the workpiece to be processed.
Further, the upper movable taper sleeve 2 is connected with the upper connecting disc 3 through a key 11, and the lower movable taper sleeve 7 is connected with the lower support frame 6 through a key 11.
From the above description, the upper movable taper sleeve 2 and the upper coupling disk 3, the lower movable taper sleeve 7 and the lower support frame 6 are all connected by the key 11, mainly for limiting the circumferential fixation between them, so that they can only do the up-and-down linear motion, and the rotation is limited.
Furthermore, the middle connecting frame 5, the upper connecting disc 3 and the lower supporting frame 6 are respectively provided with a positioning pin 12 after being locked.
As can be seen from the above description, after the middle connecting frame 5, the upper connecting plate 3 and the lower supporting frame 6 are locked, a positioning pin 12 is respectively provided, mainly to limit the rotational freedom degree in the horizontal plane, and further to lock the middle connecting frame 5, the upper connecting plate 3 and the lower supporting frame 6.
Further, a locknut 13 is further disposed at the lower end of the lower cover plate 113.
As can be seen from the above description, the anti-loose bolt 13 is disposed at the lower end of the lower cover plate 113, mainly for clamping the screw rod 4, so as to prevent the screw rod 4 from loosening during operation.
Further, oil cups 16 are arranged between the upper movable taper sleeve 2 and the upper connecting disc 3, between the lower movable taper sleeve 7 and the lower support frame 6, and at the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82.
From the above description, when the wedge internal expanding centering device is used five or six times continuously, an appropriate amount of clean lubricating oil should be filled into the oil cups 16 at the movable parts such as the three upper telescopic positioning claws 81, the three lower telescopic positioning claws 82, the space between the upper movable taper sleeve 2 and the upper coupling plate 3, and the space between the lower movable taper sleeve 7 and the lower support frame 6, which is helpful for prolonging the service life of the device.
Referring to fig. 1 to 5, the present invention further provides a method for inner expanding centering of a wedge, where the inner expanding centering device is the inner expanding centering device, and the method includes the following steps:
(1) hoisting the wedge internal expansion type centering device into a machine tool workbench, aligning and fixing;
(2) a processed workpiece is hung into the wedge internal expansion type centering device, the screw rod 4 is rotated through the handle 17, the upper movable taper sleeve 2 and the lower movable taper sleeve 7 are driven to do vertical linear motion, the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82 extend outwards, the processed workpiece is aligned, and finally the locknut 13 is locked;
(3) processing the processed workpiece by a machine tool;
(4) after the processing operation is finished, the locknut 13 is loosened, the screw rod 4 is rotated reversely through the handle 17, the spring 9 and the spring stop pin 10 are arranged between the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82, the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82 are contracted inwards through the spring 9 arranged inside, and a processed piece is loosened and taken out.
Referring to fig. 1 to 5, a first embodiment of the present invention is:
a wedge internal expanding type centering device comprises a cover plate 1, an upper movable taper sleeve 2, an upper connecting disc 3, a screw rod 4, a middle connecting frame 5, a lower supporting frame 6, a lower movable taper sleeve 7 and a telescopic positioning claw 8;
the cover plate 1 comprises an upper cover plate 111, an inner cover plate 112 and a lower cover plate 113; the upper coupling plate 3, the middle coupling frame 5 and the lower support frame 6 are connected with each other from top to bottom along the vertical direction through bolts 14 and screws 15 to form a cavity;
the upper movable taper sleeve 2, the screw rod 4 and the lower movable taper sleeve 7 are sequentially connected from top to bottom along the vertical direction; the upper part of the upper movable taper sleeve 2 is connected with an upper cover plate 111; the lower part of the upper movable taper sleeve 2 is connected with the inner cover plate 112 to form a clamping groove; the upper end of the screw rod 4 is in a convex shape and is arranged in the clamping groove; the lower end of the lower movable taper sleeve 7 is connected with a lower cover plate 113;
the upper movable taper sleeve 2, the inner cover plate 112, the screw rod 4 and the lower movable taper sleeve 7 are arranged in the cavity; the upper movable taper sleeve 2 is connected with the upper connecting disc 3; the lower movable taper sleeve 7 is connected with the lower support frame 6;
the telescopic positioning claw 8 comprises an upper telescopic positioning claw 81 and a lower telescopic positioning claw 82; the upper telescopic positioning claw 81 is connected with the outer surface of the lower part of the upper movable taper sleeve 2 and is arranged between the upper connecting disc 3 and the upper end of the middle connecting frame 5; the lower telescopic positioning claw 82 is connected with the outer surface of the upper part of the lower movable taper sleeve 7 and is arranged between the lower end of the middle connecting frame 5 and the lower support frame 6; the number of the upper telescopic positioning claws 81 and the number of the lower telescopic positioning claws 82 are three respectively.
The spring 9 and the spring catch pin 10 are disposed between the upper and lower telescopic positioning pawls 81 and 82.
The three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are respectively and uniformly distributed on the circumferential plane, and the three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are arranged in a staggered manner by 30 degrees.
The number of the upper telescopic positioning claws 81 and the number of the lower telescopic positioning claws 82 are only three, the extension of the three upper telescopic positioning claws 81 must be synchronized, and the extension of the three lower telescopic positioning claws 82 must be synchronized.
The three upper telescopic positioning claws 81 and the three lower telescopic positioning claws 82 are not extended in a linked manner.
The upper movable taper sleeve 2 is connected with the upper connecting disc 3 through a key 11, and the lower movable taper sleeve 7 is connected with the lower support frame 6 through a key 11.
And the middle connecting frame 5, the upper connecting disc 3 and the lower supporting frame 6 are respectively provided with a positioning pin 12 after being locked.
The lower end of the lower cover plate 113 is also provided with a locknut 13.
And oil cups 16 are arranged between the upper movable taper sleeve 2 and the upper connecting disc 3, between the lower movable taper sleeve 7 and the lower support frame 6, at the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82.
Referring to fig. 1 to 5, another embodiment of the present invention is:
the invention also provides a wedge internal expansion type centering method, wherein the wedge internal expansion type centering device is the wedge internal expansion type centering device, and the method comprises the following steps:
(1) hoisting the wedge internal expansion type centering device into a machine tool workbench, aligning and fixing;
(2) a processed workpiece is hung into the wedge internal expansion type centering device, the screw rod 4 is rotated through the handle 17, the upper movable taper sleeve 2 and the lower movable taper sleeve 7 are driven to do vertical linear motion, the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82 extend outwards, the processed workpiece is aligned, and finally the locknut 13 is locked;
(3) processing the processed workpiece by a machine tool;
(4) after the processing operation is finished, the locknut 13 is loosened, the screw rod 4 is rotated reversely through the handle 17, the spring 9 and the spring stop pin 10 are arranged between the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82, the upper telescopic positioning claw 81 and the lower telescopic positioning claw 82 are contracted inwards through the spring 9 arranged inside, and a processed piece is loosened and taken out.
In conclusion, the wedge internal expansion type centering device provided by the invention is simple in structural design and convenient to operate, the screw rod is rotated through the handle, the upper movable taper sleeve and the lower movable taper sleeve are respectively driven to do linear motion in the vertical direction, the three upper telescopic positioning claws and the three lower telescopic positioning claws are enabled to simultaneously extend outwards or simultaneously contract inwards through the vertical linear motion of the upper movable taper sleeve and the lower movable taper sleeve, and the central axis of the inner hole of the workpiece to be machined can be automatically corrected by the upper telescopic positioning claws and the lower telescopic positioning claws by adopting the principle of three-point positioning, so that the inner hole of the workpiece to be machined can be automatically positioned and released. The wedge internal expanding type centering device provided by the invention has the advantages that the application range of the expanding sleeve type positioning device is expanded, the wedge internal expanding type centering device is suitable for processing various processed workpieces positioned in inner holes, and the requirement on the precision of the inner holes of the processed workpieces is not high. The spring and the spring stop pin are arranged in the middle of the upper telescopic positioning claw or the lower telescopic positioning claw, and the upper telescopic positioning claw and the lower telescopic positioning claw can extend outwards to lock an inner hole of a processed workpiece or contract inwards to loosen the inner hole of the processed workpiece under the action of the spring and the spring stop pin. The last flexible locating pawl of threely staggers 30 degrees with the flexible locating pawl of three down and arranges, when the circularity of by processing the work piece is not good, makes flexible locating pawl can be in a plurality of directions and by processing the contact of work piece hole, can guarantee to be processed the central axis of work piece hole and can better with the coincidence of the central axis of the formula centring means that rises in the slide wedge. The number of the upper telescopic locating claws and the number of the lower telescopic locating claws can be respectively three, the extension of the upper telescopic locating claws is synchronous, the extension of the lower telescopic locating claws is synchronous, and the three extension of the lower telescopic locating claws is mainly used for realizing a three-point locating principle, so that the center line of a processed workpiece and the center line of the wedge internal expansion type centering device can be automatically corrected through the synchronous extension of the three upper telescopic locating claws or the three lower telescopic locating claws. The stretching out and drawing back of flexible locating jaw and three lower flexible locating jaw on the three can not the linkage, only stretch out the back that targets in place when three last flexible locating jaw promptly, three lower flexible locating jaw just can continue to outwards stretch out, perhaps stretch out the back that targets in place when three lower flexible locating jaw, three last flexible locating jaw just can continue to outwards stretch out, three last flexible locating jaw and three lower flexible locating jaw do not link and mainly be when guaranteeing to be processed work piece cylindricity not good, guarantee to go up flexible locating jaw and lower flexible locating jaw homoenergetic and by the contact of processing work piece hole. The upper movable taper sleeve and the upper connecting disc as well as the lower movable taper sleeve and the lower support frame are connected through keys, and the keys are mainly used for limiting circumferential fixation between the upper movable taper sleeve and the upper connecting disc and limiting rotation of the upper movable taper sleeve and the lower movable taper sleeve. The middle connecting frame, the upper connecting disc and the lower supporting frame are respectively provided with a positioning pin after being locked, and the positioning pins are mainly used for limiting the rotation freedom degree in the horizontal plane and further locking the middle connecting frame, the upper connecting disc and the lower supporting frame. The lower extreme of apron sets up check bolt down, mainly is in order to play clamping action to the screw rod, prevents in the course of the work that not hard up the condition appears in the screw rod. And finally, when the wedge internal expansion type centering device is continuously used for five times or six times, proper clean lubricating oil should be filled into oil cups at moving parts such as the three upper telescopic positioning claws and the three lower telescopic positioning claws, so that the service life of the device is prolonged.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (8)
1. A wedge internal expansion type centering device is characterized by comprising a cover plate, an upper movable taper sleeve, an upper connecting disc, a screw rod, a middle connecting frame, a lower supporting frame, a lower movable taper sleeve and a telescopic positioning claw;
the cover plate comprises an upper cover plate, an inner cover plate and a lower cover plate; the upper coupling plate, the middle coupling frame and the lower support frame are connected with each other through bolts and screws from top to bottom along the vertical direction to form a cavity;
the upper movable taper sleeve, the screw rod and the lower movable taper sleeve are sequentially connected from top to bottom along the vertical direction; the upper part of the upper movable taper sleeve is connected with the upper cover plate; the lower part of the upper movable taper sleeve is connected with the inner cover plate to form a clamping groove; the upper end of the screw rod is in a convex shape and is arranged in the clamping groove; the lower end of the lower movable taper sleeve is connected with the lower cover plate;
the upper movable taper sleeve, the inner cover plate, the screw rod and the lower movable taper sleeve are sleeved in the cavity; the upper movable taper sleeve is connected with the upper connecting disc; the lower movable taper sleeve is connected with the lower support frame;
the telescopic positioning claw comprises an upper telescopic positioning claw and a lower telescopic positioning claw; the upper telescopic positioning claw is connected with the outer surface of the lower part of the upper movable taper sleeve and is arranged between the upper connecting disc and the upper end of the middle connecting frame; the lower telescopic positioning claw is connected with the outer surface of the upper part of the lower movable taper sleeve and is arranged between the lower end of the middle connecting frame and the lower supporting frame; the number of the upper telescopic positioning claws and the number of the lower telescopic positioning claws are respectively three, the three upper telescopic positioning claws and the three lower telescopic positioning claws are respectively and uniformly distributed on the circumferential plane where the upper telescopic positioning claws and the lower telescopic positioning claws are located, the three upper telescopic positioning claws and the three lower telescopic positioning claws are arranged in a staggered mode by 30 degrees, and the three upper telescopic positioning claws and the three lower telescopic positioning claws can not be linked in extending.
2. The wedge internal expanding centering device of claim 1, wherein a spring and a spring catch pin are arranged between the upper telescopic positioning pawl and the lower telescopic positioning pawl.
3. The wedge internal expanding centering device of claim 1, wherein the number of each of said upper and lower retractable positioning pawls is only three, three of said upper retractable positioning pawls are extended synchronously, and three of said lower retractable positioning pawls are extended synchronously.
4. The wedge internal expanding centering device of claim 1, wherein the upper movable taper sleeve and the upper coupling disk are connected through a key, and the lower movable taper sleeve and the lower support frame are connected through a key.
5. The wedge internal expanding centering device of claim 1, wherein a positioning pin is respectively arranged after the middle connecting frame, the upper connecting disc and the lower supporting frame are locked.
6. The wedge internal expanding centering device of claim 1, wherein the lower end of the lower cover plate is further provided with a locknut.
7. The wedge internal expanding centering device of claim 1, wherein oil cups are arranged between the upper movable taper sleeve and the upper coupling disk, between the lower movable taper sleeve and the lower support frame, and at the upper telescopic positioning claw and the lower telescopic positioning claw.
8. An inner expanding type wedge centering method is characterized by comprising the following steps:
(1) hoisting the wedge internal expansion type centering device into a machine tool workbench, aligning and fixing; the wedge internal expanding centering device is the wedge internal expanding centering device of any one of claims 1 to 7;
(2) the method comprises the following steps that a processed workpiece is hung into a wedge internal expansion type centering device, a screw is rotated through a handle, an upper movable taper sleeve and a lower movable taper sleeve are driven to do vertical linear motion, an upper telescopic positioning claw and a lower telescopic positioning claw extend outwards, the processed workpiece is aligned, and finally a locknut is locked;
(3) processing the processed workpiece by a machine tool;
(4) after the machining operation is finished, the locknut is loosened, the screw rod is reversely rotated through the handle, springs and spring stop pins are arranged in the middle of the upper telescopic positioning claw and the lower telescopic positioning claw, the upper telescopic positioning claw and the lower telescopic positioning claw are enabled to contract inwards through the springs arranged inside, and a machined piece is loosened and taken out.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010700363.1A CN111730085B (en) | 2017-11-01 | 2017-11-01 | Workpiece centering device and centering method suitable for low-precision cylindrical inner hole |
| CN201711059685.7A CN108031880B (en) | 2017-11-01 | 2017-11-01 | Wedge internal expansion type centering device and centering method |
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| CN201711059685.7A CN108031880B (en) | 2017-11-01 | 2017-11-01 | Wedge internal expansion type centering device and centering method |
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| CN202010700363.1A Division CN111730085B (en) | 2017-11-01 | 2017-11-01 | Workpiece centering device and centering method suitable for low-precision cylindrical inner hole |
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| CN108031880A CN108031880A (en) | 2018-05-15 |
| CN108031880B true CN108031880B (en) | 2020-07-28 |
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| CN201711059685.7A Active CN108031880B (en) | 2017-11-01 | 2017-11-01 | Wedge internal expansion type centering device and centering method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203062324U (en) * | 2012-12-14 | 2013-07-17 | 重庆洋迪机电有限公司 | Floating clamping fixture for part with deep hole |
| CN203725807U (en) * | 2014-01-09 | 2014-07-23 | 江苏兄弟活塞有限公司 | Sleeve part machining fixture |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3317828A1 (en) * | 1983-05-17 | 1984-11-22 | Josef 7230 Schramberg Moosmann | Quick-action mandrel for machine tools |
| US4767125A (en) * | 1986-06-25 | 1988-08-30 | Owens-Illinois Television Products Inc. | Expansion chuck |
| CN1006862B (en) * | 1987-04-21 | 1990-02-21 | 武汉钢铁公司专利管理室 | Combined core-axle |
| CN102069207A (en) * | 2011-01-09 | 2011-05-25 | 无锡银联机械有限公司 | Device capable of elastically clamping two ends of long hole |
| CN202539614U (en) * | 2011-12-28 | 2012-11-21 | 包头市佳隆金属制品有限责任公司 | Double-taper sleeve split adjustable turning and grinding mandrel device |
| CN203448698U (en) * | 2013-03-21 | 2014-02-26 | 南京数控机床有限公司 | Novel single draw-bar expanding mandrel device |
| CN103252515B (en) * | 2013-06-07 | 2016-04-06 | 新余钢铁集团有限公司 | A kind of long excircle of barrel-shaped parts Special Fixture for Machining |
| CN203509095U (en) * | 2013-10-10 | 2014-04-02 | 沈阳黎明航空发动机(集团)有限责任公司 | Annular thin-wall pipe fitting centering and tensioning mechanism |
| CN205057104U (en) * | 2015-10-13 | 2016-03-02 | 永安市培鑫工贸有限公司 | A valve body fixture |
| CN105252032B (en) * | 2015-10-13 | 2017-11-21 | 永安市培鑫工贸有限公司 | A kind of valve body fixture |
-
2017
- 2017-11-01 CN CN202010700363.1A patent/CN111730085B/en active Active
- 2017-11-01 CN CN201711059685.7A patent/CN108031880B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203062324U (en) * | 2012-12-14 | 2013-07-17 | 重庆洋迪机电有限公司 | Floating clamping fixture for part with deep hole |
| CN203725807U (en) * | 2014-01-09 | 2014-07-23 | 江苏兄弟活塞有限公司 | Sleeve part machining fixture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108031880A (en) | 2018-05-15 |
| CN111730085A (en) | 2020-10-02 |
| CN111730085B (en) | 2021-06-15 |
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