Adjustable expansion mandrel

A technology of self-aligning shaft and expanding center, which is applied in the field of machinery and can solve the problems of low machining accuracy, bulky and inconvenient use, and large volume of parts

Inactive Publication Date: 2015-03-04
常州腾奇电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used special-purpose mandrel has a simple structure, but the machining accuracy of the parts is low, the volume is large, and it is bulky and inconvenient to use.
The clamps in the prior art have great limitations in application. For those parts that are easily deformed under the action of external force, such as sleeve parts, parts made of materials with greater elasticity, etc., this type of clamp The negative impact of tightness on the accuracy of the outer circle of the workpiece is very serious

Method used

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  • Adjustable expansion mandrel
  • Adjustable expansion mandrel

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] Such as figure 1 with figure 2 , an adjustable expansion mandrel, including an adjustable mandrel 1, an ejection nut 6, an expansion sleeve 2 and a bolt 4, one end of the adjustable shaft 1 is set as a conical surface 3, and the conical surface 3 is set with a passing bolt 4 An expansion sleeve 2 fixed on the adjustable mandrel 1, a washer 5 is provided between the expansion sleeve 2 and the bolt 4, and an ejection nut 6 fixed on the adjustable mandrel 1 is provided on the other side of the expansion sleeve 2. The inner side of the expansion sleeve 2 is also provided with a semicircular key 8 , and the tapered surface 3 of the adjustable mandrel 1 is provided with a keyway 9 compatible with the semicircular key 8 .

[0014] The adjustable mandrel 1 is provided with a threaded hole 7 compatible with the bolt 4, which has the advantages...

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PUM

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Abstract

The invention relates to an adjustable expansion mandrel which comprises an adjustable mandrel, an ejection nut, an expansion sleeve and a bolt. A conical face is arranged at one end of the adjustable mandrel and is sleeved with the expansion sleeve fixed to the adjustable mandrel through the bolt, a gasket is arranged between the expansion sleeve and the bolt, the ejection nut fixed to the adjustable mandrel is arranged on the other side of the expansion sleeve, a semi-circular key is further arranged on the inner side of the expansion sleeve, and a key groove matched with the semi-circular key is formed in the conical face of the adjustable mandrel. The adjustable expansion mandrel has the advantages of being compact in structure, reliable in positioning, convenient to dismount, good in practicability and the like.

Description

technical field [0001] The invention relates to the field of mechanical technology, in particular to an adjustable expansion mandrel. Background technique [0002] In the processing of sleeve parts, due to the high geometric accuracy requirements of sleeve parts, that is, the coaxiality of the inner hole and outer circle; the parallelism of both ends, it is usually necessary to design a special mandrel to ensure the machining geometric accuracy of sleeve parts. Commonly used special-purpose mandrels have a simple structure, but the machining accuracy of the parts is low, the volume is large, and it is heavy and inconvenient to use. The clamps in the prior art have great limitations in application. For those parts that are easily deformed under the action of external force, such as sleeve parts, parts made of materials with greater elasticity, etc., this type of clamp The negative impact of tightness on the accuracy of the outer circle of the workpiece is very serious. Con...

Claims

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Application Information

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IPC IPC(8): B23B31/40
CPCB23B31/4033
Inventor 张琦
Owner 常州腾奇电器有限公司
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