Spinning method of variable diameter pipe dieless floating rolling ball and fixture

A technology of moldless floating ball spinning and variable diameter tubes, which is applied in the direction of manufacturing tools, feeding devices, positioning devices, etc., can solve the problem that ball spinning cannot meet the process requirements of variable inner diameter tubes, and achieve strong replaceability and work High efficiency and easy processing

Inactive Publication Date: 2011-05-25
XIAN AEROSPACEMOTOR MACHINE FACTORY
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages existing in the prior art that the use of ball spinning cannot meet the technological requirements

Method used

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  • Spinning method of variable diameter pipe dieless floating rolling ball and fixture
  • Spinning method of variable diameter pipe dieless floating rolling ball and fixture
  • Spinning method of variable diameter pipe dieless floating rolling ball and fixture

Examples

Experimental program
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Embodiment Construction

[0030] This embodiment is a dieless floating ball spinning method for a variable diameter tube, and its specific process is:

[0031] The first step is to install the spinning tooling. Apply lubricating oil in the groove of the die ring, select 7 φ8 balls, distribute them evenly in the groove of the die ring one by one, and seal the balls in the groove by pressing blocks. Pass one end of the tube blank through the inner hole of the spindle box main shaft, the center hole of the die ring and the pressing block, and the U-shaped groove of the fork push rod, and tighten the tube blank with the chuck, which is fixed on the sleeve; through the control of the small The number of grids on the dial on the supporting plate determines the axial movement distance of the fork-shaped push rod, and the fork-shaped push rod further pushes the pressing block to move. When the right end face of the pressing block is 5.2mm from the end face of the die ring, the pressing block presses the tube b...

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Abstract

The invention discloses a spinning method of a variable diameter pipe dieless floating rolling ball and a fixture. In the invention, the designed special fixture is used to carry out multi-pass spinning on pipe blank in a segmented way, the method comprises the following concrete processes of determining the outer diameter of each diameter shrinkage section through spinning in trial, spinning each diameter shrinkage section in a segmented way, reasonably controlling the rotary pressing quantity of each spinning process, and finally obtaining a finished pipe fitting. The invention is used for spinning and forming an austenitic stainless steel pipe and has the advantages of the strong substitutability and high working efficiency and is simple and convenient to operated. Because of weak strength, the austenitic stainless steel pipe has the elongation above 40 percent, has good plasticity to be beneficial to shrinking the diameter and has good effect by applying a rolling ball to carry out spinning. The fixture can efficiently control the diameter of the diameter shrinkage of a thin-wall pipe, thereby solving the technical problem of local diameter shrinkage of a variable diameter pipe; and the fixture has simple principle, reasonably utilizes the functions of an ordinary lathe and has the advantages of easy processing and low manufacture cost.

Description

technical field [0001] The invention relates to the field of spinning manufacturing in machining, in particular to a ball spinning method and a spinning fixture. technical background [0002] With the rapid development of my country's economy, the demand for spinning products is also increasing, and the application fields of spinning processing are becoming wider and wider. At present, ball spinning has been effectively used to manufacture ultra-thin-walled tubes, especially small-diameter thin-walled tubes. Compared with other processes, the products obtained by ball spinning have smooth surfaces and high dimensional accuracy. [0003] The existing ball spinning is mainly aimed at thinning the wall thickness of tubular parts, and the inner diameter of the product during the spinning process remains unchanged, so it cannot meet the process requirements of variable inner diameter tubes, resulting in the current demand for variable inner diameter thin-walled tubes in the domes...

Claims

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Application Information

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IPC IPC(8): B21D22/14B21D43/00
Inventor 郭强赵琳瑜孙从胜李增辉王向军杨东浩肖立军王晓超曹波杜红旗
Owner XIAN AEROSPACEMOTOR MACHINE FACTORY
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