CN216706787U - Workpiece fixing device for machining and machine tool - Google Patents
Workpiece fixing device for machining and machine tool Download PDFInfo
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- CN216706787U CN216706787U CN202221124030.XU CN202221124030U CN216706787U CN 216706787 U CN216706787 U CN 216706787U CN 202221124030 U CN202221124030 U CN 202221124030U CN 216706787 U CN216706787 U CN 216706787U
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Abstract
The utility model discloses a workpiece fixing device for machining and a machine tool, belonging to the technical field of machine tool equipment and comprising: the bottom plate is provided with a plurality of positioning holes; the expansion assembly comprises a positioning column and an expansion screw, wherein the positioning column is provided with a first end and a second end; the first end is provided with a positioning shaft which can extend into the positioning hole; the second end is provided with an expansion pipe, the outside of the expansion pipe is sleeved with an expansion sleeve, and the expansion sleeve is provided with a gap; the second end is provided with a first threaded hole, and the expansion screw can penetrate through the expansion pipe and is in threaded connection with the first threaded hole; the utility model utilizes the processed unthreaded hole on the workpiece, the positioning column in the expansion assembly is fixed in the positioning hole on the bottom plate through the positioning shaft, the expansion sleeve is positioned in the unthreaded hole, the expansion screw is screwed in to expand the expansion tube to drive the expansion sleeve to expand, the expansion sleeve is tightly attached to the inner wall surface of the unthreaded hole, the workpiece is fixed on the bottom plate, the structure is simple, the cost is low, the fixing and dismounting modes are simple and convenient, and the workpiece is not easy to deform.
Description
Technical Field
The utility model relates to the technical field of machine tool equipment, in particular to a workpiece fixing device for machining and a machine tool.
Background
The transparent cover is an end cover of the bearing seat, a hole for a shaft to pass through is formed in the transparent cover, the operation condition of the interior can be observed through the transparent cover, and the transparent cover is provided with a plurality of light holes which are distributed circumferentially before processing.
When a workpiece with a thin thickness, such as a transparent cover or a similar transparent cover, is machined, the workpiece is easy to deform when the workpiece is fixed by using a traditional pressing plate, and when a blank surface is machined by adopting an inverted pressing plate or a magnetic disk adsorption mode, the workpiece machining efficiency is seriously influenced due to the characteristics of complex shape change and complex operation.
Therefore, designing a fixing device that is simple and convenient in fixing manner and not easy to cause workpiece deformation is an urgent problem to be solved in workpiece processing enterprises at the present stage.
SUMMERY OF THE UTILITY MODEL
For the problems in the prior art, the workpiece fixing device for machining and the machine tool provided by the utility model have the advantages that by utilizing the machined unthreaded hole on the workpiece, the positioning column in the expansion assembly can be fixed in the positioning hole on the bottom plate through the positioning shaft, the expansion sleeve is positioned in the unthreaded hole, the expansion pipe can be expanded by screwing the expansion screw to drive the expansion sleeve to expand, the expansion sleeve is tightly attached to the inner wall surface of the unthreaded hole, the workpiece is positioned on the bottom plate, the structure is simple, the cost is low, the fixing and dismounting modes are simple and convenient, and the workpiece is not easy to deform.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
in one aspect, the present invention provides a workpiece fixing device for machining, including:
the bottom plate is provided with a plurality of positioning holes;
an expansion assembly including a positioning post having a first end and a second end and an expansion screw; a positioning shaft is arranged at the first end and extends into the positioning hole to position the positioning column; the second end is provided with an expansion pipe, an expansion sleeve is sleeved outside the expansion pipe, and a gap arranged along the axial direction of the expansion sleeve is formed in the expansion sleeve; and a first threaded hole is formed in the position, corresponding to the expansion pipe, of the second end, and the expansion screw penetrates through the expansion pipe and is in threaded connection with the first threaded hole.
In a preferred embodiment, the bottom plate is circular in shape.
As a preferable technical solution, the positioning hole is a stepped hole, the stepped hole includes a first hole section and a second hole section along a direction penetrating into the bottom plate, an inner diameter of the first hole section is larger than an inner diameter of the second hole section, and the second hole section is a second threaded hole; the positioning shaft comprises a first section and a second section along the direction far away from the first end, the outer diameter of the first section is larger than that of the second section, and the second section is provided with an external thread; when the positioning shaft extends into the positioning hole to position the positioning column, the second section is in threaded connection with the second hole section, and the connecting surface between the first section and the second section is abutted to the step surface of the step hole.
As a preferred technical solution, the circumferential surface of the positioning column has a groove and/or a notch.
As a preferable technical solution, the expansion tube comprises a connecting block and an adjusting part; the connecting block is fixedly connected with the second end.
As a preferable technical solution, the end face of the second end has a connection groove, the connection block is embedded in the connection groove, and the connection block and the connection groove are connected by a screw.
As a preferable technical solution, the adjusting portion includes a plurality of circumferentially arranged expansion teeth, an inner wall surface of one end of the expansion teeth, which is far away from the connecting block, is set as an inclined surface, and the inclined surface expands outward in a direction far away from the connecting block; and the outer wall surface of the joint of the expansion teeth and the connecting block is provided with a circumferential depression.
As a preferable technical solution, the expansion sleeve is sleeved on the expansion teeth, and the expansion sleeve is in clearance fit with the expansion teeth.
As a preferred embodiment, the expansion screw is a countersunk head screw.
In a second aspect, the present invention provides a machine tool comprising a table and the machining workpiece fixing device according to any one of the above, wherein the base plate is fixed to the table.
The beneficial effects of the utility model are as follows:
according to the utility model, by utilizing the machined unthreaded hole on the workpiece, the positioning column in the expansion assembly can be fixed in the positioning hole on the bottom plate through the positioning shaft, the expansion sleeve is positioned in the unthreaded hole, the expansion pipe can be expanded by screwing the expansion screw to drive the expansion sleeve to expand, and the expansion sleeve is tightly attached to the inner wall surface of the unthreaded hole, so that the workpiece is positioned on the bottom plate.
Drawings
FIG. 1 is a schematic view of the overall structure of a workpiece fixture for machining according to an embodiment of the present invention in fixing a transparent cover;
FIG. 2 is a schematic structural view of the expansion assembly of FIG. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
fig. 5 is an exploded view of fig. 2.
In the figure: 1-bottom plate, 11-positioning hole, 2-positioning column, 21-first end, 22-second end, 221-first threaded hole, 23-notch, 3-expansion screw, 4-positioning shaft, 41-first section, 42-second section, 5-expansion tube, 51-connecting block, 52-expansion tooth, 521-inclined plane, 522-recess, 6-expansion sleeve, 61-gap, 7-transparent cover and 71-unthreaded hole.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
In a first aspect, referring to fig. 1-5, an embodiment of a workpiece fixing device for machining according to the present invention includes:
the positioning structure comprises a bottom plate 1, wherein a plurality of positioning holes 11 are formed in the bottom plate 1;
the expansion assembly comprises a positioning column 2 and an expansion screw 3, wherein the positioning column 2 is provided with a first end 21 and a second end 22; the first end 21 is provided with a positioning shaft 4, and the positioning shaft 4 can extend into the positioning hole 11 to position the positioning column 2; the second end 22 is provided with an expansion pipe 5, an expansion sleeve 6 is sleeved outside the expansion pipe 5, the expansion sleeve 6 is provided with a gap 61 arranged along the axial direction of the expansion sleeve, and the expansion sleeve 6 can expand outwards along with the expansion pipe 5 due to the existence of the gap 61; the second end 22 is provided with a first threaded hole 221 corresponding to the position of the expansion pipe 5, the expansion screw 3 can penetrate through the expansion pipe 5 and be in threaded connection with the first threaded hole 221, and the expansion screw 3 can drive the expansion pipe 5 to expand and expand in the process of screwing in the first threaded hole 221.
In this embodiment, referring to fig. 1, the bottom plate 1 is circular, so that the circular transparent cover 7 can be conveniently fixed; in other embodiments, the bottom plate 1 may also be polygonal, oval, etc., and the shape of the bottom plate 1 is based on the convenience of fixing the workpiece; furthermore, the position of the positioning hole 11 on the base plate 1 corresponds to the position of the unthreaded hole 71 on the workpiece, so that the expansion assembly is convenient to mount.
In this embodiment, referring to fig. 1, 3 and 4, the positioning hole 11 is a stepped hole, the stepped hole includes a first hole section and a second hole section along a direction penetrating into the bottom plate 1, an inner diameter of the first hole section is greater than an inner diameter of the second hole section, and the second hole section is a second threaded hole; the positioning shaft 4 comprises a first section 41 and a second section 42 along the direction far away from the first end 21, the outer diameter of the first section 41 is larger than that of the second section 42, and the second section 42 is provided with an external thread; when the positioning shaft 4 extends into the positioning hole 11 to position the positioning column 2, the second section 42 is in threaded connection with the second hole section, the connection surface between the first section 41 and the second section 42 is abutted against the step surface of the step hole, so that the heights of all expansion assemblies can be effectively kept consistent, the workpiece is ensured not to incline, and a better positioning effect is achieved.
In the present embodiment, referring to fig. 1-5, a circumferential surface of the positioning post 2 has a notch 23, which facilitates the positioning post 2 to be detached from the bottom plate 1 by a tool; in other embodiments, the positioning post 2 may also have a groove on its circumference to facilitate the alignment of the tool.
In this embodiment, referring to fig. 4 and 5, the expansion tube 5 includes a connecting block 51 and an adjusting portion; the connecting block 51 is fixedly connected with the second end 22, and the expansion pipe 5 is fixed on the second end 22 through the connecting block 51; specifically, the end surface of the second end 22 has a connecting groove, the connecting block 51 is embedded in the connecting groove, and the connecting block 51 and the connecting groove are fixedly connected in a screw connection manner; in actual use, the connecting block 51 and the adjusting part are usually of an integrally formed structure.
On the basis of the foregoing embodiment, referring to fig. 4 and 5, the adjusting portion includes a plurality of circumferentially arranged expansion teeth 52, an inner wall surface of one end of the expansion teeth 52 away from the connecting block 51 is set as an inclined surface 521, the inclined surface 521 expands outward in a direction away from the connecting block 51, when the expansion screw 3 is screwed into the first threaded hole 221, a circumferential surface of the expansion screw 3 abuts against the inclined surface 521, so that the expansion teeth 52 are gradually expanded outward; the outer wall surface of the joint of the expansion teeth 52 and the connecting block 51 is provided with a circumferentially arranged depression 522, and the depression 522 enables the expansion teeth 52 to be more easily expanded outwards; further, the expansion sleeve 6 is sleeved on the expansion teeth 52, the expansion sleeve 6 is in clearance fit with the expansion teeth 52, and when the expansion teeth 52 expand and expand, the expansion sleeve 6 can be driven to expand, so that the expansion sleeve 6 is tightly attached to the inner wall surface of the unthreaded hole 71, and the workpiece is positioned and fixed; the friction force between the expansion sleeve 6 and the inner wall surface of the unthreaded hole 71 can be adjusted only by adjusting the screwing-in depth of the expansion screw 3, so that the workpiece can be fixed and detached.
It should be noted that, in practical use, the appropriate number and positions of the expansion assemblies can be selected on the bottom plate 1 according to different sizes of workpieces; for the unthreaded holes 71 with different apertures on the workpiece, the expansion sleeve 6 with a slightly smaller outer diameter is selected, so that the workpiece can be conveniently positioned and fixed.
It should be noted that, referring to fig. 4 and 5, the expansion screw 3 is preferably a countersunk screw, and when the countersunk screw is screwed into the first threaded hole 221, the expansion teeth 52 can be engaged with the countersunk screw, so as to better promote the expansion teeth 52 to be expanded outwards.
In a second aspect, the present invention provides a machine tool comprising a table and any one of the above-described workpiece fixing devices for machining, wherein a base plate 1 is fixed to the table, and after a workpiece is fixed to the base plate 1 by a tightening assembly, a subsequent machining process can be started conveniently by the machine tool.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Workpiece fixing device for machining, its characterized in that includes:
the bottom plate is provided with a plurality of positioning holes;
an expansion assembly including a positioning post having a first end and a second end and an expansion screw; a positioning shaft is arranged at the first end and extends into the positioning hole to position the positioning column; the second end is provided with an expansion pipe, an expansion sleeve is sleeved outside the expansion pipe, and a gap arranged along the axial direction of the expansion sleeve is formed in the expansion sleeve; and a first threaded hole is formed in the position, corresponding to the expansion pipe, of the second end, and the expansion screw penetrates through the expansion pipe and is in threaded connection with the first threaded hole.
2. A workpiece holding apparatus for machining according to claim 1, wherein the shape of said base plate is circular.
3. The workpiece fixing device for machining according to claim 1, wherein the positioning hole is provided as a stepped hole including a first hole section and a second hole section in a direction deep into the bottom plate, an inner diameter of the first hole section being larger than an inner diameter of the second hole section, the second hole section being provided as a second threaded hole; the positioning shaft comprises a first section and a second section along the direction far away from the first end, the outer diameter of the first section is larger than that of the second section, and the second section is provided with an external thread; when the positioning shaft extends into the positioning hole to position the positioning column, the second section is in threaded connection with the second hole section, and the connecting surface between the first section and the second section is abutted to the step surface of the step hole.
4. A machining workpiece holding device according to claim 1, characterised in that the positioning stud has a groove and/or a notch on its peripheral surface.
5. The workpiece fixing device for machining according to claim 1, wherein the expansion tube includes a connecting block and an adjusting portion; the connecting block is fixedly connected with the second end.
6. The workpiece fixing device for machining according to claim 5, wherein an end face of the second end has a connecting groove, the connecting block is fitted into the connecting groove, and the connecting block and the connecting groove are connected by a screw.
7. The workpiece fixing device for machining according to claim 5, wherein the adjusting portion includes a plurality of circumferentially arranged bulging teeth, an inner wall surface of one end of the bulging teeth, which is away from the joint block, is set as an inclined surface, and the inclined surface expands outward in a direction away from the joint block; and the outer wall surface of the joint of the expansion teeth and the connecting block is provided with a circumferential depression.
8. A workpiece holding device for machining according to claim 7 wherein said expansion sleeve is fitted over said expansion teeth, said expansion sleeve being in clearance fit with said expansion teeth.
9. A machine tool fixing device according to claim 7 or 8 in which the expansion screw is a countersunk screw.
10. A machine tool comprising a table to which the base plate is fixed and a workpiece holding device for machining according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221124030.XU CN216706787U (en) | 2022-05-12 | 2022-05-12 | Workpiece fixing device for machining and machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221124030.XU CN216706787U (en) | 2022-05-12 | 2022-05-12 | Workpiece fixing device for machining and machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216706787U true CN216706787U (en) | 2022-06-10 |
Family
ID=81874770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221124030.XU Active CN216706787U (en) | 2022-05-12 | 2022-05-12 | Workpiece fixing device for machining and machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216706787U (en) |
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2022
- 2022-05-12 CN CN202221124030.XU patent/CN216706787U/en active Active
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