CN213225175U - Self-centering spherical surface machining clamp - Google Patents
Self-centering spherical surface machining clamp Download PDFInfo
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- CN213225175U CN213225175U CN202021715256.8U CN202021715256U CN213225175U CN 213225175 U CN213225175 U CN 213225175U CN 202021715256 U CN202021715256 U CN 202021715256U CN 213225175 U CN213225175 U CN 213225175U
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- expansion sleeve
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Abstract
The utility model belongs to the technical field of machining, a from centering sphere adds clamping apparatus is provided. The clamp comprises a clamp base body, a cushion block, an expansion sleeve, an expansion pin and a fastening bolt. The clamp base body is connected with a machine tool and plays a role in fixing; the cushion block is used for fixing the expansion sleeve and supporting the part matrix; the expansion sleeve is a main working part and plays a role in fixing parts; the tight round pin that expands is the main functional unit with the part is fixed to anchor clamps, and the tight cover excircle diameter grow that will expand through the screw precession to expand tightly and from the centering with the part hole. The utility model has simple structure and no common positioning and clamping devices such as a pressure plate, a mandrel, a nut and the like; and the clamping is convenient, the operation is simple, the processing period is saved, and the product quality and the production efficiency are improved. The utility model discloses have simultaneously from centering locate function, small, compact structure, convenient to use, maintain simple, low in manufacturing cost, it is big to promote the meaning, can extensively be used for solid of revolution part.
Description
Technical Field
The utility model belongs to the technical field of machining, concretely relates to be suitable for special fixture on numerically controlled fraise machine for the sphere of processing excircle high accuracy.
Background
At present, the processing method for processing the spherical surface mainly comprises two methods: the first processing method is that ball milling is adopted to grind a spherical surface, the diameter of the spherical surface is the diameter of the grinding wheel, and the size of the processed spherical surface is changed along with the abrasion of the grinding wheel, so that the ball milling processing method is not suitable for large-batch processing; the second processing method is to turn the spherical surface by a numerical control lathe according to the circular arc track, but the limitation of the processed material is large, cutter back-off is easy to generate, the sizes of all positions of the spherical surface are inconsistent, the parts are out of tolerance, the surface roughness cannot meet the requirement after processing, polishing treatment is needed subsequently, and the method is not suitable for semi-arc processing with high precision and high surface roughness requirement. The fixture used during machining is that the mandrel is matched with the inner hole of the part, the end face is compressed by the nut, and once the mandrel is worn, the outer spherical surface and the inner hole of the part can generate the condition of different axes, so that the quality of the product is greatly influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a be convenient for numerically controlled fraise machine clamping, location reliably stable, utilize the anchor clamps of numerically controlled fraise machine and special tool processing sphere to replace numerically controlled lathe car sphere, simplify the technological process of turner's polishing, reduce the clamping number of times, reduce the positioning error that repeated location produced, thereby improve product quality and part production efficiency.
The technical scheme of the utility model is that:
a self-centering spherical surface machining clamp comprises a clamp base body 1, a cushion block 2, an expansion sleeve 3, an expansion pin 4 and a fastening bolt 5.
A stepped hole is formed in the center of the clamp base body 1, the upper aperture of the stepped hole is larger than the lower aperture, and threads are formed on the inner surface of the lower hole; the fixture base body 1 is connected with a machine tool and plays a role in fixing. The upper part of the inner hole of the expansion sleeve 3 is conical, and the outer surface of the expansion sleeve 3 is provided with an annular groove; the lower end of the clamp is arranged in a stepped hole of the clamp base body 1, and the upper end of the clamp is sleeved in an inner hole of a part to play a role in fixing the part. Cushion 2 whole be the integral type structure that hollow cylinder and flange are constituteed, cushion 2 passes through fastening bolt 5 to be fixed at 1 upper surface of anchor clamps base member, and is located and expands between 3 annular groove lower extremes of tight cover and the part lower surface for fixed tight cover 3 and the support part base member that expands. The upper part of the expansion pin 4 is of a conical structure matched with the inner hole of the expansion sleeve 3; the lower part is the cylinder structure, and the cylinder surface is equipped with 1 shoulder hole complex screw thread of anchor clamps base member, expands tight round pin 4 and advances through the screw thread precession in following the part hole to the excircle diameter grow of tight cover 3 that will expand, thereby fix the part hole expansion tightly on anchor clamps and from centering.
The use method of the clamp comprises the following steps:
the numerical control milling machine is provided with a turning turntable main shaft and is used for processing shaft parts, but corresponding machine tool accessories are not configured, so that a tool is required to clamp the parts. Firstly, processing the size of an inner hole of a part to be processed to be phi 80H7 in a grinding processing mode; then, fixing the fixture on a turning turntable of a numerical control milling machine, sleeving an inner hole of the part to be processed on an expansion sleeve 3 of the fixture, and then screwing an expansion pin 4; the expansion pin 4 moves downwards, the matching surface between the expansion pin 4 and the expansion sleeve 3 is a conical surface, and the size of the expansion sleeve 3 is increased in the downward movement process of the expansion pin 4 until the expansion sleeve 3 is in contact with the inner surface of the part to form enough friction force, so that the part is fixed; and finally, starting the numerical control milling machine to process the outer spherical surface.
The utility model has the advantages that: the utility model provides a self-centering spherical surface processing clamp, which has simple structure, the main structure is an expansion pin and an expansion sleeve, and the clamp has no common positioning and clamping devices such as a pressure plate, a mandrel, a nut and the like; and the clamping is convenient, the operation is simple, the processing period is saved, and the product quality and the production efficiency are improved. The utility model discloses have simultaneously from centering locate function, small, compact structure, convenient to use, maintain simple, low in manufacturing cost, it is big to promote the meaning, can extensively be used for solid of revolution part.
Drawings
FIG. 1 is a schematic view of a clamping structure of a clamp for a numerically controlled milling machine.
In the figure: 1, a clamp base body; 2, cushion blocks; 3, expanding and tightening the sleeve; 4, expanding and tightening the pin; and 5, fastening the bolt.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
A self-centering spherical surface machining clamp comprises a clamp base body 1, a cushion block 2, an expansion sleeve 3, an expansion pin 4 and a fastening bolt 5.
A stepped hole is formed in the center of the clamp base body 1, the aperture of the stepped hole positioned above is larger than that of the stepped hole positioned below, and threads are arranged on the inner surface of the stepped hole positioned below; the fixture base body 1 is connected with a machine tool and plays a role in fixing. The upper part of the inner hole of the expansion sleeve 3 is conical, and the outer surface of the expansion sleeve 3 is provided with an annular groove; the lower end of the clamp is arranged in a stepped hole of the clamp base body 1, and the upper end of the clamp is sleeved in an inner hole of a part to play a role in fixing the part. Cushion 2 whole be the integral type structure that hollow cylinder and flange are constituteed, cushion 2 passes through fastening bolt 5 to be fixed at 1 upper surface of anchor clamps base member, and is located and expands between 3 annular groove lower extremes of tight cover and the part lower surface for fixed tight cover 3 and the support part base member that expands. The upper portion of the expansion pin 4 is of a conical structure matched with the inner hole of the expansion sleeve 3, the lower portion of the expansion pin is of a cylindrical structure, threads matched with the stepped hole of the clamp base body 1 are arranged on the outer surface of the cylinder, the expansion pin 4 is screwed in from the inner hole of the part through the threads, the outer circle diameter of the expansion sleeve 3 is enlarged, and the inner hole of the part is expanded and fixed on the clamp and self-centered.
The use method of the clamp comprises the following steps:
firstly, processing the size of an inner hole of a part to be processed to be phi 80H7 in a grinding processing mode; then, fixing the fixture on a turning turntable of a numerical control milling machine, sleeving an inner hole of the part to be processed on an expansion sleeve 3 of the fixture, and then screwing an expansion pin 4; the expansion pin 4 moves downwards, the matching surface between the expansion pin 4 and the expansion sleeve 3 is a conical surface, and the size of the expansion sleeve 3 is increased in the downward movement process of the expansion pin 4 until the expansion sleeve 3 is in contact with the inner surface of the part to form enough friction force, so that the part is fixed; and finally, starting the numerical control milling machine to process the outer spherical surface.
The use effect is as follows: by using the clamp, the precision grade of the processed arc is improved to 6-grade precision, and the surface roughness can reach below R0.8; compared with the prior processing method of turning the spherical surface and then polishing, the processing time is reduced by 80 percent. Therefore, the processing quality and the processing efficiency of the parts are improved.
The above description of exemplary embodiments has been presented only to illustrate the technical solutions of the present invention, and is not intended to be exhaustive or to limit the present invention to the precise forms described. Obviously, many modifications and variations are possible in light of the above teaching to those skilled in the art. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to thereby enable others skilled in the art to understand, implement and utilize the invention in various exemplary embodiments and with various alternatives and modifications. It is intended that the scope of the invention be defined by the following claims and their equivalents.
Claims (1)
1. A self-centering spherical surface machining clamp is characterized by comprising a clamp base body (1), a cushion block (2), an expansion sleeve (3), an expansion pin (4) and a fastening bolt (5);
a stepped hole is formed in the center of the clamp base body (1), the aperture of the stepped hole positioned above is larger than that of the stepped hole positioned below, and threads are arranged on the inner surface of the stepped hole positioned below; the clamp base body (1) is connected with a machine tool to play a role in fixing;
the upper part of the inner hole of the expansion sleeve (3) is conical, and an annular groove is formed in the outer surface of the expansion sleeve (3); the lower end of the clamp is arranged in a stepped hole of the clamp base body (1), and the upper end of the clamp is sleeved in an inner hole of a part to play a role in fixing the part;
the whole cushion block (2) is of an integrated structure consisting of a hollow cylinder and a flange, the cushion block (2) is fixed on the upper surface of the clamp base body (1) through a fastening bolt (5), is positioned between the lower end of the annular groove of the expansion sleeve (3) and the lower surface of the part, and is used for fixing the expansion sleeve and supporting the part base body;
the upper portion of tight round pin (4) expands is for with the tight cover (3) hole complex toper structure that expands, and the lower part is the cylinder structure, and the cylinder surface is equipped with anchor clamps base member (1) shoulder hole complex screw thread, expands and tightly to sell (4) and follow through the screw thread precession in the part hole to the excircle diameter grow of tight cover (3) will expand, thereby expand tightly fix the part hole on anchor clamps and from centering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021715256.8U CN213225175U (en) | 2020-08-17 | 2020-08-17 | Self-centering spherical surface machining clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021715256.8U CN213225175U (en) | 2020-08-17 | 2020-08-17 | Self-centering spherical surface machining clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213225175U true CN213225175U (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021715256.8U Active CN213225175U (en) | 2020-08-17 | 2020-08-17 | Self-centering spherical surface machining clamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116551351A (en) * | 2023-03-28 | 2023-08-08 | 瑞安市裕玺转向系统有限公司 | Axial expansion pin fastening structure for automobile power-assisted steering system |
-
2020
- 2020-08-17 CN CN202021715256.8U patent/CN213225175U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116551351A (en) * | 2023-03-28 | 2023-08-08 | 瑞安市裕玺转向系统有限公司 | Axial expansion pin fastening structure for automobile power-assisted steering system |
| CN116551351B (en) * | 2023-03-28 | 2023-10-20 | 瑞安市裕玺转向系统有限公司 | Axial expansion pin fastening structure for automobile power-assisted steering system |
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