Inner hole positioning pneumatic tensioning device
By designing an inner hole positioning pneumatic tightening device, the cylinder drives the inclined wedge slider to slide in the sleeve, and efficient positioning and clamping of thin-walled slewing parts is achieved, which solves the problems of low production efficiency, low accuracy and easy wear in the prior art, and achieves efficient and accurate positioning and processing.
Patent Information
- Application Number
- CN202421849929.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-01
AI Technical Summary
When clamping thin-wall rotary parts, existing three-jaw positioning fixtures have low production efficiency, low self-centering accuracy, and are prone to wear, resulting in the coaxiality of the machining inner holes that do not meet the standards, the clamping force is not easy to control, and it is easy to cause the workpiece clamp to be not tight or deformed.
An inner hole positioning pneumatic tightening device is designed, including a sleeve, a first oblique wedge slider, a second oblique wedge slider and an extrusion block. The first oblique wedge slider is driven to slide laterally in the sleeve by a cylinder, and convert it into radial sliding through the second oblique wedge slider and extrusion block to achieve clamping and release.
The device is simple in structure and convenient in operation. It can improve the stress distribution of the workpiece clamping end, ensure positioning accuracy and quality, improve clamping efficiency, extend service life, and avoid workpiece deformation and surface quality damage.
Smart Images
Figure CN222857781U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to an inner hole positioning pneumatic tensioning device. Background Art
[0002] In the machinery manufacturing industry, we often encounter a variety of thin-walled rotating parts, which need to be positioned and processed based on the processed inner holes.
[0003] The existing process mostly uses three-jaw positioning clamping to clamp the workpiece. When the batch of workpieces is large, the original three-jaw positioning clamping takes a long time to clamp a workpiece, and the production efficiency is low. At the same time, the three-jaw positioning clamping process is prone to wear, and the self-centering accuracy is not high. After repeated use and replacement, it is easy to wear, which will cause the coaxiality of the processed inner hole to fail to meet the requirements of the drawing. During the clamping process, the opening force of the three jaws is difficult to control, which can easily cause the workpiece to be clamped loosely or deformed. Utility Model Content
[0004] The purpose of the utility model is to provide an inner hole positioning pneumatic tensioning device, which has a simple structure, is easy to operate, is economical and practical, can ensure the accuracy and quality of positioning, and the whole device is operated by a cylinder, which improves the efficiency of clamping and can solve the problems in the prior art.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] An inner hole positioning pneumatic tensioning device includes a sleeve, a dust cover is provided at the end of the sleeve, a first inclined wedge slider and a second inclined wedge slider are provided on the inner side of the sleeve, the first inclined wedge slider and the second inclined wedge slider slide relatively, and an extrusion block is provided on the side of the second inclined wedge slider.
[0007] Preferably, the number of the extrusion blocks is three, and the three extrusion blocks are distributed on the sleeve at equal intervals.
[0008] Preferably, the extrusion block extends away from the side end surface of the second wedge slider to the outside of the sleeve.
[0009] Preferably, a cylinder threaded fixing hole for connecting a cylinder is provided at the middle end of the first inclined wedge sliding block.
[0010] Preferably, the first inclined wedge slider slides laterally in the sleeve by being pulled by a cylinder.
[0011] Preferably, the second angled wedge slider and the extrusion block are used to convert the lateral sliding of the first angled wedge slider in the sleeve into the radial sliding of the first angled wedge slider in the sleeve.
[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0013] The inner hole positioning pneumatic tensioning device of the utility model has a simple structure, is easy to operate, and is economical and practical. Since the inner hole positioning pneumatic tensioning device is in surface contact with the inner arc surface of the thin-walled part and the contact surface area is large, the force distribution at the clamping end of the workpiece can be improved, and the thin-walled cylindrical part will not be deformed by force and the surface quality of the part will not be damaged. The positioning accuracy and quality can be guaranteed, and the whole device is operated by a cylinder, which improves the clamping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the inner hole positioning pneumatic tensioning device of the utility model;
[0015] Figure 2 It is a rear view of the inner hole positioning pneumatic tensioning device of the utility model;
[0016] Figure 3 It is a side view of the inner hole positioning pneumatic tensioning device of the utility model;
[0017] Figure 4 It is a top view of the inner hole positioning pneumatic tensioning device of the utility model;
[0018] Figure 5 For the utility model Figure 2 Cross-sectional view at AA in the figure.
[0019] In the figure: 1, first oblique wedge slider; 11, cylinder threaded fixing hole; 2, sleeve; 3, dust cover; 4, second oblique wedge slider; 5, extrusion block. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] In order to solve the technical problems that the existing fixtures are prone to deformation during positioning, resulting in unstable and inaccurate positioning and slow clamping speed, please refer to Figure 1-Figure 5 , this embodiment provides the following technical solutions:
[0022] An inner hole positioning pneumatic tensioning device comprises a sleeve 2, and a dust cover 3 is arranged at the end of the sleeve 2.
[0023] A first angled wedge slider 1 and a second angled wedge slider 4 are arranged on the inner side of the sleeve 2 , and the first angled wedge slider 1 and the second angled wedge slider 4 slide relative to each other.
[0024] In this embodiment, a cylinder threaded fixing hole 11 for connecting a cylinder is provided at the middle end of the first wedge sliding block 1 .
[0025] In this embodiment, the first wedge slider 1 slides laterally in the sleeve 2 by being pulled by a cylinder.
[0026] A pressing block 5 is arranged on the side surface of the second wedge sliding block 4 .
[0027] It should be noted that the second inclined wedge slider 4 and the extrusion block 5 can be made of P20 medium carbon alloy steel mold steel, which has excellent wear resistance, so as to increase the service life of the inner hole positioning pneumatic tensioning device. At the same time, PU or rubber pads can be added to the mounting surfaces of the second inclined wedge slider 4 and the extrusion block 5 to reduce the impact of the second inclined wedge slider 4 and the extrusion block 5 on thin-walled rotating parts during radial movement. If the thin-walled rotating parts have surface requirements on the inner wall, such as no bumps, indentations, etc., the extrusion block 5 can be made of polymer materials such as PTFE. The parts are detachable for easy maintenance and replacement.
[0028] In this embodiment, the number of the extrusion blocks 5 is three, and the three extrusion blocks 5 are distributed on the sleeve 2 at equal intervals.
[0029] In this embodiment, the extrusion block 5 extends away from the side end surface of the second wedge slider 4 to the outside of the sleeve 2 .
[0030] In this embodiment, the second angled wedge slider 4 and the extrusion block 5 are used to convert the lateral sliding of the first angled wedge slider 1 in the sleeve 2 into the radial sliding of the first angled wedge slider 1 in the sleeve 2 .
[0031] It should be noted that when the inner hole positioning pneumatic tensioning device is in use, the cylinder is connected to the cylinder threaded fixing hole 11, and the cylinder is started, and the cylinder drives the first inclined wedge slider 1 to slide horizontally. Since the first inclined wedge slider 1 and the second inclined wedge slider 4 slide relative to each other, and an extrusion block 5 is provided on the side of the second inclined wedge slider 4, when the cylinder drives the first inclined wedge slider 1 to slide horizontally, the second inclined wedge slider 4 and the extrusion block 5 can convert the horizontal sliding of the first inclined wedge slider 1 in the sleeve 2 into the radial sliding of the first inclined wedge slider 1 in the sleeve 2, so as to achieve the purpose of tightening and loosening.
[0032] In summary, the inner hole positioning pneumatic tensioning device has a simple structure, is easy to operate, and is economical and practical. Since the inner hole positioning pneumatic tensioning device is in surface contact with the inner arc surface of the thin-walled part and the contact surface area is large, it can improve the force distribution at the clamping end of the workpiece, and will not cause the thin-walled cylindrical part to be deformed by force and the surface quality of the part to be damaged. The positioning accuracy and quality can be guaranteed, and the entire device is operated by a cylinder, which improves the clamping efficiency.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An inner hole positioning pneumatic tensioning device, comprising a sleeve (2), characterized in that: A dust cover (3) is provided at the end of the sleeve (2), and a first inclined wedge slider (1) and a second inclined wedge slider (4) are provided on the inner side of the sleeve (2). The first inclined wedge slider (1) and the second inclined wedge slider (4) slide relative to each other, and an extrusion block (5) is provided on the side of the second inclined wedge slider (4).
2. The inner hole positioning pneumatic tensioning device according to claim 1, characterized in that: The number of the extrusion blocks (5) is three, and the three extrusion blocks (5) are distributed on the sleeve (2) at equal intervals.
3. The inner hole positioning pneumatic tensioning device according to claim 2, characterized in that: The extrusion block (5) extends away from the side end surface of the second wedge slider (4) to the outside of the sleeve (2).
4. The inner hole positioning pneumatic tensioning device according to claim 1, characterized in that: A cylinder threaded fixing hole (11) for connecting a cylinder is provided at the middle end of the first wedge sliding block (1).
5. The inner hole positioning pneumatic tensioning device according to claim 1, characterized in that: The first inclined wedge sliding block (1) is pulled by a cylinder to slide transversely in the sleeve (2).
6. The inner hole positioning pneumatic tensioning device according to claim 1, characterized in that: The second inclined wedge slider (4) and the extrusion block (5) are used to convert the lateral sliding of the first inclined wedge slider (1) in the sleeve (2) into the radial sliding of the first inclined wedge slider (1) in the sleeve (2).