CN217434159U

CN217434159U - Thin-wall cylindrical workpiece fixing tool

Info

Publication number: CN217434159U
Application number: CN202221738432.9U
Authority: CN
Inventors: 张朝彪; 刘燕; 钱学军; 王哲
Original assignee: Jining Polytechnic
Current assignee: Jining Polytechnic
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-09-16
Anticipated expiration: 2032-07-07

Abstract

The application discloses a fixing tool for a thin-wall cylindrical workpiece, which comprises a first clamping piece, a positioning mechanism and a second clamping piece, wherein a positioning hole or a positioning groove is formed in a first clamping surface of the first clamping piece; the positioning mechanism comprises a positioning mandrel and a positioning table which are coaxially connected, the positioning table is connected to the end part of the positioning mandrel and is coaxially provided with a limiting boss matched with the positioning hole or the positioning groove, and the outer circumference of the positioning table is matched with a non-taper inner hole of the thin-wall cylindrical workpiece to be fixed; the second clamping piece is matched with the first clamping piece in a mode that the second clamping piece can be driven to be relatively close to or far away from the first clamping piece, the second clamping piece is slidably sleeved on the positioning core shaft, and the second clamping piece is provided with a pressing point protruding out of the cylindrical workpiece in the circumferential direction so as to be capable of pressing and fixing the cylindrical workpiece when the second clamping piece is relatively close to the first clamping piece. The fixing tool is simple in overall structure, convenient to operate, low in cost and easy to maintain.

Description

Thin-wall cylindrical workpiece fixing tool

Technical Field

The utility model relates to a tube-shape work piece clamping technical field especially relates to fixed frock of thin wall class tube-shape work piece.

Background

At present, cylindrical workpieces are difficult to clamp and fix when the outer surfaces of the cylindrical workpieces are machined, particularly thin-wall cylindrical workpieces are poor in stability, and the quality of the workpieces is affected due to the fact that the workpieces are prone to local deformation in the machining process after the cylindrical workpieces are fixed.

For example, when the spline is rolled on the surface of a thin-wall cylindrical workpiece, the workpiece is not easy to align, and the machining precision requirement of the spline is higher. Therefore, a great amount of time and labor are often needed to clamp and fix the cylindrical workpiece, the fixing efficiency is low, and the fixing cost is high.

SUMMERY OF THE UTILITY MODEL

An advantage of the utility model is that a frock is fixed to thin wall class tube-shape work piece is provided, wherein can form spacingly at the both ends of tube-shape work piece through the cooperation of first clamping piece and second clamping piece, and simultaneously, the quick installation location of tube-shape work piece not only is convenient for through the cooperation of location dabber and location platform, can also form stable support in the non-taper hole of tube-shape work piece through the location platform, and then effectively improved the fixed strength to the tube-shape work piece, the processing of the surface of the tube-shape work piece taper end of being convenient for.

An advantage of the utility model is that a fixed frock of thin wall class tube-shape work piece is provided, overall structure is simple, convenient operation, and is with low costs, easy to maintain.

An advantage of the utility model is that a frock is fixed to thin wall class tube-shape work piece is provided, wherein is convenient for fix frock direct mount on the workstation of lathe through the mounting hole on the first clamping piece, has further made things convenient for the use of this fixed frock.

The utility model has the advantages of the utility model provides a frock is fixed to thin wall class tube-shape work piece wherein through setting up annular step, can reduce the area of high accuracy machined surface, reduces the processing cost, still makes things convenient for the processing of mounting hole and the workstation of fixed frock and processing bed to be connected.

An advantage of the utility model is that a frock is fixed to thin wall class tube-shape work piece is provided, wherein through adjusting nut convenient manual or through the relative first position that compresses tightly of instrument regulation second clamping piece, simple to use, easy to maintain, it is with low costs.

An advantage of the utility model is that a frock is fixed to thin wall class tube-shape work piece is provided, wherein the cooperation through tapering position sleeve and elastic component makes this fixed frock can form good automatic support in the tapering hole of tube-shape work piece to the convenient processing to the surface of the non-tapering end of tube-shape work piece.

In order to achieve the utility model discloses above at least one advantage, the utility model provides a frock is fixed to thin wall class tube-shape work piece, include:

the first clamping piece is provided with a first clamping surface, and a positioning hole or a positioning groove is formed in a preset position of the first clamping surface, wherein the positioning hole or the positioning groove vertically extends relative to the first clamping surface;

the positioning mechanism comprises a positioning mandrel and a positioning table which are coaxially connected, wherein the positioning table is connected to the end part of the positioning mandrel, a limiting boss is coaxially arranged on one side far away from the positioning mandrel, the limiting boss is matched with the positioning hole or the positioning groove, and the outer circumference of the positioning table is matched with a non-taper inner hole of the thin-wall cylindrical workpiece to be fixed;

the second clamping piece is provided with a second clamping surface opposite to the first clamping piece and is matched with the first clamping piece in a mode of being driven to be relatively close to or far away from the first clamping piece, the second clamping piece is slidably sleeved on the positioning core shaft, and the second clamping piece is provided with a pressing point protruding out of the cylindrical workpiece in the circumferential direction so as to be capable of pressing and fixing the cylindrical workpiece when being relatively close to the first clamping piece.

According to the utility model discloses an embodiment, first clamping piece is implemented as the base, wherein first clamping piece is keeping away from the side of locating hole or constant head tank evenly is provided with a plurality of mounting hole along circumference for detachably connects the workstation of lathe.

According to the utility model discloses an embodiment, first clamping piece is in first clamping surface still is provided with annular step, annular step's inner circle with keep there being predetermined distance between the outer lane of location platform, just annular step's outer lane with first clamping piece outer lane parallel and level, the mounting hole is seted up on the annular step.

According to the utility model discloses an embodiment, the positioning core axle with location platform integrated into one piece or detachable connect.

According to the utility model discloses an embodiment, fixed frock still includes adjusting nut, the location dabber is kept away from the one end of location platform is provided with the external screw thread, the external screw thread with adjusting nut's internal thread cooperatees, through the rotation the adjusting nut drive the second clamping piece is close to and compresses tightly first clamping piece.

According to the utility model discloses an embodiment, adjusting nut is shouldered hexagon nut.

According to an embodiment of the present invention, the second clamping member is implemented as a pressing circular plate, the pressing circular plate protrudes in the circumferential direction the cylindrical workpiece, and the second clamping member is formed with a notch adapted to accommodate the positioning mandrel, the notch is formed by extending one side of the second clamping member to the center of the second clamping member.

According to the utility model discloses an embodiment, the second clamping piece is implemented as compressing tightly the frame, compress tightly the frame and have at least two compress tightly the position, and at least two compress tightly the position and be in compress tightly the circumference symmetric distribution of frame.

According to the utility model discloses an embodiment, fixed frock still includes the tapering position sleeve, the tapering position sleeve cover is established the positioning spindle is epaxial, and is being close to elastic component elastic connection is passed through to one side of location platform the location platform, the outer lane of tapering position sleeve with the tapering hole of tube-shape work piece cooperatees, wherein the tapering hole forms the tube-shape work piece the other end of non-tapering hole, just the aperture size of tapering hole is greater than the aperture size of non-tapering hole.

According to the utility model relates to an embodiment, the tapering position sleeve inlays and is equipped with a plurality of guide in circumference sliding fit, the one end fixed connection of guide the anticreep round pin axle is installed to the location platform, the other end, the elastic component cover is established on the guide to with pressurized mode elastic connection taper position sleeve with between the location platform.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.

Drawings

Fig. 1 shows a schematic structural diagram of a thin-wall cylindrical workpiece fixing tool of the present application.

Fig. 2 shows a schematic partial structural view of the thin-wall cylindrical workpiece fixing tool when the thin-wall cylindrical workpiece fixing tool is supported at a non-taper end.

Fig. 3 shows a schematic cross-sectional view of the thin-wall cylindrical workpiece fixing tool supported at a taper end.

Reference numerals are as follows: 10-cylindrical workpiece, 11-taper end, 12-non-taper end, 20-first clamping piece, 201-positioning hole or positioning groove, 202-mounting hole, 21-annular step, 30-positioning mechanism, 31-positioning mandrel, 32-positioning table, 33-limiting boss, 40-second clamping piece, 401-notch, 50-adjusting nut, 60-taper positioning sleeve, 61-elastic piece, 62-guiding piece and 63-anti-falling pin shaft.

Detailed Description

The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the disclosure of the specification, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships that are based on those shown in the drawings, which are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, the above-described terms should not be construed as limiting the invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

In order to reduce the difficulty in clamping and fixing the cylindrical workpiece, particularly the thin-wall cylindrical workpiece, and ensure the workpiece quality of the cylindrical workpiece when the outer surface is processed, a thin-wall cylindrical workpiece fixing tool is provided, referring to fig. 1 to 3, which is mainly used for fixing the cylindrical workpiece 10, particularly the thin-wall cylindrical workpiece, wherein the inner hole of the tapered end 11 of the cylindrical workpiece 10 is further stabilized, and the inner hole of the non-tapered end 12 of the cylindrical workpiece 10 is further stabilized, so as to correspondingly and conveniently process the outer surface of the non-tapered end 12 and the outer surface of the tapered end 11 of the cylindrical workpiece 10, for example, a spline is rolled on the outer surface of the cylindrical workpiece 10.

It should also be noted that the tubular workpiece 10 generally has opposite tapered and

non-tapered ends

11 and 12, and the inner bore of the tubular workpiece 10 at the tapered end 11 is a tapered bore, while the inner bore of the tubular workpiece 10 at the non-tapered end 12 is a bore without taper, i.e., a through bore of uniform diameter. When machining the outer surface of the tapered end 11 of the cylindrical workpiece 10, the present application forms a support in the through-hole of the non-tapered end 12 of the cylindrical workpiece 10, and when machining the outer surface of the non-tapered end 12 of the cylindrical workpiece 10, the present application forms a support in the tapered hole of the cylindrical workpiece 10.

Specifically, the fixing tool for the thin-wall cylindrical workpiece comprises a first clamping piece 20, a positioning mechanism 30 and a second clamping piece 40, wherein the top surface of the first clamping piece 20 is a first clamping surface, a positioning hole or a positioning groove 201 is formed in a preset position of the first clamping surface, and the positioning hole or the positioning groove 201 vertically extends towards the bottom relative to the first clamping surface and is mainly used for positioning the positioning mechanism 30, so that the cylindrical workpiece 10 can be conveniently and quickly fixed. The positioning mechanism 30 comprises a positioning mandrel 31 and a positioning table 32 which are coaxially connected, wherein the positioning table 32 is connected to the end of the positioning mandrel 31, and a limiting boss 33 is coaxially arranged on one side far away from the positioning mandrel 31, wherein the limiting boss 33 is matched with the positioning hole or the positioning groove 201, and the outer circumference of the positioning table 32 is matched with the non-taper inner hole of the thin-wall cylindrical workpiece 10 to be fixed. When the cylindrical workpiece 10 is fixed, the positioning mandrel 31 is firstly controlled, the positioning table 32 is installed into the positioning hole or the positioning groove 201 through the limiting boss 33, because the limiting boss 33, the positioning table 32 and the positioning mandrel 31 are coaxially and fixedly connected, and the outer circumference of the positioning table 32 is matched with the non-taper inner hole of the thin-wall cylindrical workpiece 10 to be fixed, at this time, the non-taper end 12 of the cylindrical workpiece can be vertically inserted from the upper end of the positioning mandrel 31 by taking the outer circumference of the positioning table 32 as a positioning reference, and is quickly clamped on the positioning table 32 to form machining positioning, and meanwhile, the positioning table 32 can also form support in the non-taper inner hole of the cylindrical workpiece 10.

The second clamping part 40 has a second clamping surface opposite to the first clamping part 20, i.e. the bottom surface of the second clamping part 40 is a second clamping surface. The second clamping member 40 is matched with the first clamping member 20 in a manner that the second clamping member 40 can be driven to be relatively close to or far away from the first clamping member 20, wherein the second clamping member 40 is slidably sleeved on the positioning core shaft 31, and the second clamping member 40 is provided with a pressing point protruding out of the cylindrical workpiece 10 in the circumferential direction so as to be capable of pressing and fixing the cylindrical workpiece 10 when the second clamping member is relatively close to the first clamping member 20. In this way, under the guiding action of the positioning mandrel 31, the second clamping member 40 is driven to cooperate with the first clamping member 20 to fix the cylindrical workpiece 10 in the longitudinal direction, that is, the upper end and the lower end of the cylindrical workpiece 10 are respectively limited, and meanwhile, the positioning table 32 can also form stable support in the non-tapered inner hole of the cylindrical workpiece 10, so that the outer surface of the tapered end 11 of the cylindrical workpiece 10 can be very conveniently machined, and the machining is convenient.

The fixing tool for the thin-wall cylindrical workpieces is simple in structure, easy to maintain, low in equipment cost and maintenance cost, convenient to operate and easy to effectively fix the cylindrical workpieces, particularly the thin-wall cylindrical workpieces 10, so that the outer surfaces of the cylindrical workpieces 10 can be conveniently machined.

Preferably, the first clamping member 20 is implemented as a base, wherein the first clamping member 20 is uniformly provided with a plurality of mounting holes 202 along the circumferential direction at the side end far away from the positioning hole or groove 201, and is used for detachably connecting with a workbench of a machine tool, so that the fixing tool is conveniently and detachably fixed on the workbench of the machine tool and is suitable for working on the workbench of different machine tools.

Considering that the first clamping surface of the first clamp 20 is used as a positioning reference surface for one end of a cylindrical workpiece, high machining accuracy or surface roughness is required, but the entire first clamping surface is not necessarily a fastening surface, and finishing the entire first clamping surface inevitably wastes much time and machining cost, and therefore, it is further preferable that the first clamp 20 further includes an annular step 21 on the first clamping surface, in which a predetermined distance is maintained between an inner ring of the annular step 21 and an outer ring of the positioning table 32, and an outer ring of the annular step 21 is flush with the outer ring of the first clamp 20, and the mounting hole 202 is opened in the annular step 21. In this way, the annular step 21 can reduce a large finishing area, reduce finishing time and cost while ensuring positioning accuracy of the cylindrical workpiece 10, and facilitate machining of the mounting hole 202 and connection and fixation of the first clamping member 20 to a machine tool by a thin plate.

Preferably, the positioning core shaft 31 and the positioning table 32 are integrally formed, so that the positioning core shaft has better structural strength and structural stability and is convenient to machine and manufacture, or the positioning core shaft and the positioning table 32 are detachably connected, for example, a pin shaft is inserted into a positioning hole of a positioning disc, and then the positioning core shaft and the positioning table are welded together, so that the positioning core shaft and the positioning table are suitable for fixing cylindrical workpieces 10 with different inner diameters by replacing the positioning table 32 with different outer diameters, and the application range is wide.

Preferably, the fixing tool further comprises an adjusting nut 50, such as a hexagonal nut with shoulder, and functions as a nut and a gasket. And an external thread is arranged at one end, far away from the positioning table 32, of the positioning mandrel 31, and the external thread is matched with the internal thread of the adjusting nut 50. The second clamping piece 40 is driven to approach and press the first clamping piece 20 by rotating the adjusting nut 50, so that the operation is simple, the operation is convenient, the cost is low, and the later maintenance is convenient.

As a preferred embodiment, the second clamping member 40 is implemented as a pressing circular plate which protrudes in the circumferential direction from the cylindrical workpiece 10 so as to be able to press down the cylindrical workpiece 10 as a whole in the entire circumferential direction as the pressing point, and at the same time, the second clamping member 40 is formed with a notch 401 adapted to receive the positioning mandrel 31, wherein the notch 401 extends from one side of the second clamping member 40 to the center of the second clamping member 40. Thus, when the cylindrical workpiece 10 needs to be fixed or removed, the second clamping member 40 can be removed only by unscrewing without completely removing the adjusting nut 50, so that the cylindrical workpiece 10 can be very easily mounted or dismounted, the dismounting time is saved, and the working efficiency is improved

As another preferred embodiment, the second clamping member 40 is implemented as a clamping frame, wherein the clamping frame has at least two clamping points, and at least two clamping points are symmetrically distributed in the circumferential direction of the clamping frame. Generally, to ensure stable and good compression of the cylindrical workpiece, the compression rack has at least three compression points distributed at an included angle of 120 °, or four compression points distributed at an included angle of 90 °, such as a cross-shaped bracket, wherein the more compression points, the better the fastening effect on the cylindrical workpiece 10, and the compression rack structure can save certain resources.

Further preferably, with reference to fig. 3, the fixing tool further includes a taper positioning sleeve 60, wherein the taper positioning sleeve 60 is sleeved on the positioning mandrel 31, and is close to one side of the positioning table 32 and elastically connected to the positioning table 32 through an elastic member 61, and simultaneously, an outer ring of the taper positioning sleeve 60 is matched with the taper inner hole of the cylindrical workpiece 10, wherein the taper inner hole is formed at the other end of the non-taper inner hole of the cylindrical workpiece 10, and the aperture size of the taper inner hole is greater than the aperture size of the non-taper inner hole. After the taper positioning sleeve 60 is installed, the taper positioning sleeve 60 is in clearance fit with an opening of a taper inner hole of the cylindrical workpiece 10, along with downward movement of the taper end 11 of the cylindrical workpiece 10, the hole diameter of the inner hole of the taper end 11 of the cylindrical workpiece 10 is gradually reduced until the hole diameter is fitted with the outer circumference of the taper positioning sleeve 60, at this time, the elastic potential energy of the elastic part 61 is overcome, the taper positioning sleeve 60 is driven to move downward synchronously, until the taper positioning sleeve 60 and the taper hole of the cylindrical workpiece 10 form a very tight fit, that is, a strong internal support can be formed in the inner hole of the taper end 11 of the cylindrical workpiece 10, at this time, the limiting boss 33 on the positioning table 32 is just inserted into the positioning hole or the positioning groove 201, and the outer surface of the non-taper end 12 of the cylindrical workpiece 10 can be processed. In this case, the positioning relationship between the limiting boss 33 and the positioning hole or positioning groove 201, and the supporting relationship of the taper positioning sleeve 60 at the inner hole of the taper end 11 of the cylindrical workpiece 10 are mainly embodied, and in combination with the limiting of the first clamping member 20 and the second clamping member 40 at the two ends of the cylindrical workpiece 10, the cylindrical workpiece 10 can be firmly fixed, so as to facilitate the processing of the outer surface of the non-taper end 12 of the cylindrical workpiece 10.

Further preferably, the taper positioning sleeve 60 is embedded with a plurality of guiding elements 62 in a circumferential sliding fit manner, wherein one end of each guiding element 62 is fixedly connected with the positioning table 32, the other end of each guiding element is provided with an anti-dropping pin shaft 63, and meanwhile, the elastic element 61 is sleeved on the guiding elements 62 and elastically connected between the taper positioning sleeve 60 and the positioning table 32 in a pressed manner. The guiding element 62, such as a guiding post or a guiding rod, can drive the taper positioning sleeve 60 to move up and down directionally, so as to fit with the inner wall of the cylindrical workpiece, thereby forming a stable and good internal support with good support strength. The anti-slip pin 63 includes a transverse pin and a longitudinal pin, wherein the transverse pin is horizontally inserted into the top end of the guide 62 to prevent the taper positioning sleeve 60 from upwardly bouncing when the cylindrical workpiece 10 is removed, and the longitudinal pin is inserted into the guide 62 at the top of the guide 62 and is inserted into the transverse pin to prevent the transverse pin from disengaging from the guide 62.

It should be noted that the terms "first and second" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying any relative importance, and are to be interpreted as names.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The advantages of the present invention are already complete and effectively realized. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. Thin wall class tube-shape work piece fixes frock, its characterized in that includes:

the second clamping piece is provided with a second clamping surface opposite to the first clamping piece and is matched with the first clamping piece in a manner that the second clamping piece can be driven to be relatively close to or far away from the first clamping piece, the second clamping piece is slidably sleeved on the positioning mandrel, and the second clamping piece is provided with pressing points protruding out of the cylindrical workpiece in the circumferential direction so as to press and fix the cylindrical workpiece when the second clamping piece is relatively close to the first clamping piece.

2. The thin-wall cylindrical workpiece fixing tool according to claim 1, wherein the first clamping member is implemented as a base, and a plurality of mounting holes are uniformly formed in the first clamping member along the circumferential direction at the side end far away from the positioning hole or the positioning groove, and are used for being detachably connected with a workbench of a machine tool.

3. The tool for fixing the thin-walled cylindrical workpiece according to claim 2, wherein the first clamping member is further provided with an annular step on the first clamping surface, a predetermined distance is kept between an inner ring of the annular step and an outer ring of the positioning table, the outer ring of the annular step is flush with the outer ring of the first clamping member, and the mounting hole is formed in the annular step.

4. The tool for fixing the thin-walled cylindrical workpiece according to claim 1, wherein the positioning mandrel and the positioning table are integrally formed or detachably connected.

5. The tool for fixing the thin-wall cylindrical workpiece according to claim 1, further comprising an adjusting nut, wherein an external thread is arranged at one end, away from the positioning table, of the positioning mandrel, the external thread is matched with the internal thread of the adjusting nut, and the adjusting nut is rotated to drive the second clamping member to approach and press the first clamping member.

6. The tool for fixing the thin-walled cylindrical workpiece according to claim 5, wherein the adjusting nut is a hexagonal nut with a shoulder.

7. The thin-walled cylindrical workpiece fixing tool according to claim 6, wherein the second clamping member is implemented as a pressing circular plate which protrudes out of the cylindrical workpiece in the circumferential direction, and is formed with a notch adapted to receive the positioning mandrel, the notch extending from one side of the second clamping member to the center of the second clamping member.

8. The thin-walled cylindrical workpiece fixing tool according to claim 6, wherein the second clamping member is implemented as a pressing frame, the pressing frame has at least two pressing points, and the at least two pressing points are symmetrically distributed in the circumferential direction of the pressing frame.

9. The fixing tool for the thin-walled cylindrical workpiece according to claim 7 or 8, further comprising a taper positioning sleeve, wherein the taper positioning sleeve is sleeved on the positioning mandrel and is elastically connected with the positioning table through an elastic member at one side close to the positioning table, an outer ring of the taper positioning sleeve is matched with a taper inner hole of the cylindrical workpiece, the taper inner hole is formed at the other end of the non-taper inner hole of the cylindrical workpiece, and the aperture size of the taper inner hole is larger than that of the non-taper inner hole.

10. The tool for fixing the thin-walled cylindrical workpiece according to claim 9, wherein a plurality of guide members are embedded in the taper positioning sleeve in a circumferential sliding fit manner, one end of each guide member is fixedly connected with the positioning table, an anti-falling pin shaft is installed at the other end of each guide member, and the elastic members are sleeved on the guide members and elastically connected between the taper positioning sleeve and the positioning table in a pressed manner.