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Resistance heat tension straightening device and straightening method thereof

A resistance heating and straightening technology, applied in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of high production cost, decreased straightness, low efficiency, etc., and achieve less surface, less residual stress, and straightening accuracy stable effect

Active Publication Date: 2010-02-03
XIAN AEROSPACE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems existing in the prior art, such as low efficiency, high production cost, and the decrease of straightness caused by changes in internal stress, or the need to apply a large tensile force, which is prone to breakage, the present invention proposes a Resistance thermal tension straightening device and straightening method

Method used

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  • Resistance heat tension straightening device and straightening method thereof

Examples

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Effect test

Embodiment 1

[0026] This embodiment is a straightening device for titanium alloy rods, and the material to be straightened is TC4 titanium alloy. The length of the straightening sample is 3m, and the diameter is Φ10mm. Before straightening, it is processed by hot rolling and rough grinding.

[0027] This embodiment includes a power source 1, a counterweight weight 2, a lower chuck 3, an upper chuck 4, a cylinder 5, a bracket 6, a limit switch 7 and a fixed pulley 8. Wherein, lower chuck 3 and upper chuck 4 all adopt the three-jaw chuck that lathe is used; All are equipped with connecting ring at the outer surface center of the bottom of lower chuck 3 and upper chuck 4. The power supply 1 adopts a low-voltage power adjustable power supply with a maximum power of 25KW; the cylinder 5 and the limit switch 7 are finished parts.

[0028] The support 6 is a rod structure, which is welded by angle steel and fixed on the ground; there is a fixed beam in the middle of the support 6 . A fixed pull...

Embodiment 2

[0043] This embodiment is a device for thermal straightening of molybdenum rods, and the straightened material is Mo1 pure molybdenum rods. The length of the straightened sample is 3m, the diameter is Φ6mm, and it is a hot drawn product before straightening.

[0044] This embodiment includes a power source 1, a counterweight weight 2, a lower chuck 3, an upper chuck 4, a cylinder 5, a bracket 6, a limit switch 7 and a fixed pulley 8. Wherein, lower chuck 3 and upper chuck 4 all adopt the three-jaw chuck that lathe is used; All are equipped with connecting ring at the outer surface center of the bottom of lower chuck 3 and upper chuck 4. The power supply 1 adopts a low-voltage power adjustable power supply with a maximum power of 25KW; the cylinder 5 and the limit switch 7 are finished parts.

[0045] The support 6 is a rod structure, which is welded by angle steel and fixed on the ground; there is a fixed beam in the middle of the support 6 . A fixed pulley 8 is installed at t...

Embodiment 3

[0060] This embodiment is used for a thermal straightening device for stainless steel rods, the material is 1Cr18Ni9, the length is 2.5m, and the diameter is Φ20mm. The processing state of the material is that the skin is peeled off by a centerless car after rolling, the surface is bright, and the diameter is 1%. In order to further finish grinding and obtain the bar with precision grade h7, it is necessary to straighten the bar so that its straightness is controlled within 1‰.

[0061] This embodiment includes a power source 1, a counterweight weight 2, a lower chuck 3, an upper chuck 4, a cylinder 5, a bracket 6, a limit switch 7 and a fixed pulley 8. Wherein, lower chuck 3 and upper chuck 4 all adopt the three-jaw chuck that lathe is used; All are equipped with connecting ring at the outer surface center of the bottom of lower chuck 3 and upper chuck 4. The power supply 1 adopts a low-voltage power adjustable power supply with a maximum power of 25KW; the cylinder 5 and th...

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Abstract

The invention discloses a resistance heat tension straightening device and a straightening method thereof. A fixed pulley is arranged at the center of the top end of a support (6); and a cylinder (5)is fixed on the lower surface of a beam of the support. One end of a steel wire of the fixed pulley is fixed on the beam of the support (6), and the other end of the steel wire of the fixed pulley isfixedly connected with a connecting ring of an upper clamping head (4). Two ends of a titanium alloy bar are respectively clamped in the upper clamping head (4) and a lower clamping head (3); and a balance weight (2) is hung below the lower clamping head (3). Output terminals of a power supply (1) are communicated with two ends of the bar by wires respectively. The weight of the balance weight andthe tension straightening length of the bar are obtained by calculation. The bar triggers a limit switch when reaching a preset tension straightening length, the power supply is disconnected, and straightening is stopped. The resistance heat tension straightening device is characterized by high straightening precision, simple device structure and operation method, low surface oxidization of short-term heated materials, and small residual stress inside the materials after hot straightening, and is applicable to metallic materials with higher resistivity.

Description

1. Technical field [0001] The invention relates to the field of thermal processing, in particular to a resistance thermal tension straightening device and a straightening method. 2. Background technology [0002] The straightening of metal bars usually adopts methods such as pressure straightening, inclined roll straightening and stretching straightening. [0003] Straightening metal rods through a pressure straightening machine is the simplest straightening method. This method is to reversely bend the rod with the original bend between the two movable fulcrums of the workbench with a pressure head to achieve straightening. This method not only has low straightening accuracy, but also requires constant detection during the straightening process, which is very inefficient. [0004] Skew roll straightening includes two-roll and multi-roll straightening. This method is the most common method for metal bar straightening. The principle is that after the metal bar passes through ...

Claims

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Application Information

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IPC IPC(8): B21D3/12B21D37/16
Inventor 吕尚宁李建康张科全张高潮吉毅松杨恩纯焦立志
Owner XIAN AEROSPACE NEW MATERIAL
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