Screw-type straightening method for tap bolt of slender rod

A slender rod and spiral technology, applied in the field of spiral straightening, can solve problems such as poor straightening effect, microcracks or fractures, and achieve good straightening effect

Active Publication Date: 2010-05-19
DONGFENG MOTOR FASTENER CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

Both alignments have some disadvantages
In the multi-wheel point alignment method, local points are subjected to concentrated force for a long time, and there is a risk of microcracks or breakage; in the hyperbolic alignment method, although the workpiece moves back and forth during alignment, the force point is concentrated in the middle of the screw, The two ends are not stressed, the straightening effect is poor, and the pass rate is about 90%

Method used

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  • Screw-type straightening method for tap bolt of slender rod
  • Screw-type straightening method for tap bolt of slender rod

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Embodiment Construction

[0010] Combine below figure 1 , 2 As shown, the present invention is further described as follows: a spiral straightening method of a slender rod headed bolt, comprising a pair of straightening rollers 3,4 and auxiliary rollers 5, and the outer circle of the straightening rollers 3,4 is provided with a convex For the single-head helical surface, the width of the auxiliary roller 5 is the same as the thread pitch of the straightening rollers 3 and 4; a pair of straightening rollers 3 and 4 and the auxiliary roller 5 are respectively fixed on a pair of rotating shafts rotating in the same direction. After fixing, the stagger angle of the helical surfaces of the straightening roller 3 and the straightening roller 4 is 180 °, and the auxiliary roller 5 is corresponding to the root of the rod portion of the slender rod with the head bolt 2, and is set between the straightening rollers 3 and 4. There is a support block 1, and the height of the support block 1 should ensure that the...

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Abstract

The invention relates to a screw-type straightening method for a tap bolt of a slender rod, which comprises a single spiral curve straightening roller wheel, an auxiliary roller wheel and a supporting block, wherein the straightening roller wheel is in a single spiral curve type, the straightening roller wheel and the auxiliary roller wheel are arranged on a parallel rotating shaft in turn, and the supporting block is arranged between the straightening roller wheel and the auxiliary roller wheel. During the straightening process, only a rod part of the tap bolt of the slender rod is placed on the supporting block and the rod part of the tap bolt of the slender rod rotates in a negative direction under the action of frictional force, the rod part is straightened by rolling, and until the surface of the rod part of a component is polished and spotless, only slight visible uniform spiral traces exist. The screw-type straightening method can straighten the rod part of the tap bolt of the slender rod comprehensively without blind spots, has no stress concentration in the straightening process, cannot generate potential safety hazards such as micro cracks, and has a good straightening effect.

Description

technical field [0001] The invention relates to a straightening method for rods, in particular to a spiral straightening method for slender rods with headed bolts Background technique [0002] At present, there are two main methods for straightening bending parts: 1. Multi-wheel point straightening, 2. Hyperbolic straightening. Both alignments have some disadvantages. In the multi-wheel point alignment method, local points are subjected to concentrated force for a long time, and there is a risk of microcracks or breakage; in the hyperbolic alignment method, although the workpiece moves back and forth during alignment, the force point is concentrated in the middle of the screw, The two ends are not stressed, the straightening effect is poor, and the pass rate is about 90%. Contents of the invention [0003] The purpose of the present invention is to provide a spiral straightening method for a headed bolt with a slender rod, which can perform omnidirectional straightening ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D3/05
Inventor 戴之伦丁治随马建
Owner DONGFENG MOTOR FASTENER CO LTD
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