CN221389975U - Axial clamping and positioning device for bar machining - Google Patents
Axial clamping and positioning device for bar machining Download PDFInfo
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- CN221389975U CN221389975U CN202323233542.7U CN202323233542U CN221389975U CN 221389975 U CN221389975 U CN 221389975U CN 202323233542 U CN202323233542 U CN 202323233542U CN 221389975 U CN221389975 U CN 221389975U
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- bar
- elastic claw
- positioning
- main shaft
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- 238000003754 machining Methods 0.000 title claims abstract description 14
- 210000000078 claw Anatomy 0.000 claims abstract description 58
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000008602 contraction Effects 0.000 claims 1
- 230000008859 change Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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Abstract
The application discloses an axial clamping and positioning device for bar machining, which comprises a positioning part which is arranged on a main shaft and is in contact and limit with the end part of a bar, and a horizontal clamping part which is arranged on an elastic claw and is in flat contact with the peripheral surface of the bar in a shrinkage deformation state. The positioning component is a positioning rod which is radial and connected to the main shaft through the axis of the main shaft, and a waist-shaped displacement hole which axially slides compared with the positioning rod is arranged on the side wall of the elastic claw. The elastic claw is provided with single-clack bodies distributed along the circumferential space on one side, and the horizontal clamping component is a horizontal clamping plate which is horizontally hinged on the inner surface of each single-clack body. According to the clamping and positioning device, the end part of the bar can be positioned through the positioning component, so that axial positioning errors brought by the elastic claws due to the diameter difference of the bar are avoided, and the axial positioning precision is improved.
Description
Technical Field
The application relates to the technical field of bar machining, in particular to an axial clamping and positioning device for bar machining.
Background
Bar stock workpieces are a type of workpiece structure that is widely machined in machining, including, for example, surface turning, drilling, threading, and the like. In addition, the rod is usually clamped on a chuck of a machine tool during processing, and the clamping mechanism shown in figure 1 of the specification comprises an elastic claw with a multi-petal structure penetrating through one side of an inner cavity of a main shaft, and a driving mechanism (such as a cylinder) connected with the elastic claw and driving the elastic claw to radially shrink is arranged on the other side, and a piston of the driving mechanism is connected with the end part (threaded connection) of the elastic claw. And as shown in fig. 10, one side of the elastic claw is circumferentially divided into a plurality of single-petal bodies, and the outer wall of each single-petal body is obliquely contacted with the inner wall of the main shaft port. When a bar workpiece is processed, the bar is penetrated in the elastic claw, the elastic claw is driven to axially move by the air cylinder, the plurality of single-petal bodies are extruded by the inclined plane of the inner wall of the port of the main shaft to radially shrink (shown by arrow a in fig. 1), the plurality of single-petal bodies are attached to the outer peripheral surface of the bar and clamp and fasten the bar, and the processing operation of the bar can be performed after the main shaft rotates.
As shown in fig. 2, due to the diameter difference of the outer circle of the part blank, the axial displacement of the bar is inconsistent and has axial deviation caused by inconsistent shrinkage amplitude of the elastic claw during clamping, so that the axial positioning precision of the part is affected, and the machining and forming precision of the bar is further affected. Meanwhile, as shown in fig. 8, when the elastic claw clamps the bar, the elastic claw positioned at one side of the single-petal body is contracted, the connecting end of the elastic claw and the air cylinder is not contracted, and then the elastic claw deforms like an arc arrow b in fig. 8 when clamping the bar, so that when the bar with different outer diameters is clamped and deformed, the single-petal body forms an included angle with the circumferential surface of the bar, the bar cannot be flatly clamped, the clamping force of the elastic claw on the bar is insufficient, and the processing precision of the bar can be influenced.
Disclosure of Invention
The application aims to provide an axial clamping and positioning device for bar machining, which can realize bar end positioning and solve the problem that the clamping stroke of an elastic claw is changed to influence the axial positioning due to the change of the outer diameter size of a bar.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows: the utility model provides an axial clamping and positioning device of bar machining, includes the main shaft, wears to be equipped with the elastic claw of multi-lamella structure in main shaft inner chamber one side, and is provided with the actuating mechanism who is connected and order about the radial shrink of elastic claw with the elastic claw at the opposite side, its characterized in that: the main shaft is also provided with a positioning part which is in contact and limit with the end part of the bar, and the elastic claw is provided with a horizontal clamping part which is in flat contact with the peripheral surface of the bar in the shrinkage deformation state.
Preferably, the positioning component is a positioning rod which is radially connected to the main shaft through the axis of the main shaft, and a waist-shaped displacement hole which axially slides compared with the positioning rod is formed in the side wall of the elastic claw.
Preferably, one side of the elastic claw is provided with single petals distributed along the circumferential direction at intervals, and the horizontal clamping component is a horizontal clamping plate which is horizontally hinged on the inner surface of each single petal.
Preferably, a spring rod which is contacted with the end part of the bar stock and smaller than the outer diameter of the bar stock is further arranged on one side of the positioning rod.
The beneficial effects of the application are as follows: according to the clamping and positioning device, the end part of the bar can be positioned through the positioning component, and the influence of the clamping stroke change of the elastic claw on the axial positioning due to the change of the outer diameter size of the bar is solved. The clamping force on the bar stock can be improved through the horizontal clamping component, so that the problems that the bar stock is deviated and the machining precision is affected due to the acting force of the cutter are solved.
Drawings
Fig. 1 is a diagram showing the assembly structure of the main shaft and the elastic claw.
Fig. 2 shows the spring jaws of fig. 1 with different clamping strokes for clamping bars of different outer diameters, resulting in a deviation in axial positioning of the bars (shown in phantom).
FIG. 3 is a schematic representation of the positioning rod provided on the spindle of the present application.
FIG. 4 is an illustration of the axial positioning of the positioning rod of FIG. 3 with respect to a bar stock in accordance with the present application.
FIG. 5 is an illustration of the present application with a spring lever disposed on a positioning lever.
FIG. 6 is an illustration of an extrusion spring bar of the present application during bar clamping.
FIG. 7 is a schematic representation of the bar being pushed out of the device by a spring rod after the bar is processed according to the application.
FIG. 8 is a graphical representation of the pinch angle of the resilient jaw of the present application with respect to the surface of a bar.
FIG. 9 is a schematic representation of the present application with a horizontal clamp plate in flat contact with the bar surface.
Fig. 10 is a schematic view of the structure of the elastic claw of the present application.
In the figure: 70-bar work piece.
Detailed Description
In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is further described below with reference to the accompanying drawings and examples.
An axial clamping and positioning device for bar machining, which is shown by referring to figures 1-10, comprises a main shaft 1, wherein one side of an inner cavity of the main shaft 1 is penetrated with an elastic claw 2 with a multi-petal structure, and the other side of the inner cavity of the main shaft 1 is provided with a driving mechanism which is connected with the elastic claw 2 and drives the elastic claw 2 to radially shrink. The driving mechanism can be a hydraulic cylinder or an air cylinder, and the piston of the driving mechanism is connected with the end part of the elastic claw 2 (preferably in a threaded connection). And as shown in fig. 10, one side of the elastic claw 2 is circumferentially divided into a plurality of single-petal bodies 21, and the outer wall of each single-petal body 21 is obliquely contacted with the inner wall of the port of the main shaft 1. When a bar workpiece is machined, the bar workpiece is arranged in the elastic claw 2 in a penetrating mode, the elastic claw 2 is driven to axially move through the air cylinder, the plurality of single-petal bodies 21 are extruded by the inclined planes of the inner walls of the ports of the main shaft 1 to radially shrink, the plurality of single-petal bodies 21 are attached to the outer peripheral surfaces of the bar and clamp and fasten the bar, and the machining operation of the bar can be performed after the main shaft 1 rotates.
In order to solve the problems of axial displacement and insufficient clamping force of an elastic claw in the existing processing of a bar workpiece, the main shaft 1 is provided with the positioning component which is in contact with the end part of the bar and limits the position, the positioning component is fixedly positioned based on the connection with the main shaft 1, and the end part of the bar can be contacted with the positioning component after the bar is penetrated in the elastic claw, so that the influence of the clamping stroke change of the elastic claw on the axial positioning due to the change of the outer diameter size of the bar is solved.
The elastic claw 2 is further provided with a horizontal clamping part which is in flat contact with the peripheral surface of the bar in a shrinkage deformation state, and when the elastic claw 2 is used for clamping different bars in shrinkage deformation, the horizontal clamping part can be flat contacted with the peripheral surface of the bar, so that the clamping force on the bar is improved, and the problems that the bar is deviated and the machining precision is influenced due to the acting force of a cutter are solved.
Specifically, as shown in fig. 3-4, the positioning component is a positioning rod 3 which is radial and is connected to the main shaft 1 through the axis of the main shaft 1, preferably has a T-shaped rod structure, and is connected and fixed with the main shaft 1 through a nut sleeved at the end after the axis of the main shaft 1 passes through. When the bar is clamped, the end part of the bar is contacted with the side wall of the positioning rod 3 to realize the axial positioning of the bar, so that the influence of the change of the clamping stroke of the elastic claw on the axial positioning due to the change of the outer diameter size of the bar can be effectively overcome.
In order to solve the problem, as shown in fig. 10, a waist-shaped displacement hole 2a which is axially sliding compared with the positioning rod 3 is formed on the side wall of the elastic claw 2, so that the elastic claw 2 can not contact with the positioning rod 3 during axial displacement, and the position interference during clamping the bar is avoided.
As shown in fig. 9, one side of the elastic claw 2 is provided with single petals 21 distributed along the circumferential direction at intervals, and the horizontal clamping member is a horizontal clamping plate 4 which is horizontally hinged on the inner surface of each single petal 21. When the plurality of single-petal bodies 21 of the elastic claw 2 shrink to clamp the bar, the horizontal clamping plate 4 and the single-petal bodies 21 rotate relatively, so that the horizontal clamping plate 4 can be in flat contact with the peripheral surface of the bar, and further the clamping area and the clamping tightness of the bar are ensured.
When the bar with the shaft structure is processed, one side of the bar is penetrated in the elastic claw, and after the processing is finished, in order to quickly take off the bar, as shown in fig. 5-7, one side of the positioning rod 3 is also provided with a spring rod 5 which is contacted with the end part of the bar and is smaller than the outer diameter of the bar. When the bar is clamped, the end of the bar is contacted with the spring rod 5 and extruded, and the bar is clamped and processed by the elastic claw 2 under the contracted state of the spring rod 5. After the elastic claw 2 is clamped, the elastic action of the spring rod 5 drives the bar to automatically move out of the elastic claw 2, so that the bar can be conveniently taken out and unloaded, and the working efficiency of batch processing can be improved. The outer diameter of the spring rod 5 is smaller than that of the bar stock, so that the spring rod 5 is prevented from being contacted when the elastic claw 2 clamps the bar stock, and the clamping force on the bar stock is prevented from being influenced.
The principle of the application is as follows: when the bar is clamped, firstly, the end of the bar is contacted with the spring rod 5 and extruded, and in the contracted state of the spring rod 5, the bar is clamped and processed by the elastic claw 2. After the processing is finished and the elastic claw 2 is released from clamping, the bar stock is driven to automatically move out of the elastic claw 2 under the elastic action of the spring rod 5, so that the bar stock can be taken out and unloaded, and single bar stock positioning processing is realized.
The foregoing has shown and described the basic principles, principal features and advantages of the application. The present application is subject to various changes and modifications without departing from the spirit and scope thereof, and such changes and modifications fall within the scope of the application as hereinafter claimed.
Claims (4)
1. The utility model provides an axial centre gripping positioner of bar machining, includes main shaft (1), wears to be equipped with multi-lamella structure's elastic claw (2) in main shaft (1) inner chamber one side, and is provided with the actuating mechanism who is connected and order about elastic claw (2) radial contraction with elastic claw (2) on the opposite side, its characterized in that: the main shaft (1) is also provided with a positioning component which is in contact limit with the end part of the bar stock, and the elastic claw (2) is provided with a horizontal clamping component which is in flat contact with the peripheral surface of the bar stock in the shrinkage deformation state.
2. The axial clamp positioning device of claim 1, wherein: the positioning component is a positioning rod (3) which is radial and is connected to the main shaft (1) through the axis of the main shaft (1), and a waist-shaped displacement hole (2 a) which is axially sliding compared with the positioning rod (3) is formed in the side wall of the elastic claw (2).
3. The axial clamp positioning device of claim 2, wherein: the elastic claw (2) is provided with single-clacks (21) distributed along the circumferential interval on one side, and the horizontal clamping component is a horizontal clamping plate (4) which is horizontally hinged on the inner surface of each single-clack (21).
4. An axial clamping and positioning device as claimed in claim 3, characterized in that: one side of the positioning rod (3) is also provided with a spring rod (5) which is contacted with the end part of the bar and is smaller than the outer diameter of the bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323233542.7U CN221389975U (en) | 2023-11-29 | 2023-11-29 | Axial clamping and positioning device for bar machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323233542.7U CN221389975U (en) | 2023-11-29 | 2023-11-29 | Axial clamping and positioning device for bar machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221389975U true CN221389975U (en) | 2024-07-23 |
Family
ID=91925485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323233542.7U Active CN221389975U (en) | 2023-11-29 | 2023-11-29 | Axial clamping and positioning device for bar machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221389975U (en) |
-
2023
- 2023-11-29 CN CN202323233542.7U patent/CN221389975U/en active Active
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