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Stretching processing technology of plate threaded hole

A processing technology and threaded hole technology, which is applied in the field of sheet threaded hole drawing processing technology, can solve the problems of short thread segments, unable to ensure the firmness of bolts or screws, etc., and achieve the effect of satisfying installation, heat reduction, and friction reduction.

Active Publication Date: 2020-08-25
重庆博顺电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to reduce the weight of the distribution box for easy handling, the thickness of the metal plate used in the distribution box is relatively thin, about 1-2mm. Because the plate usually needs to be provided with threaded holes to fix other parts, but because the plate is thicker Thin, the length of the threaded section of the threaded hole opened in this way is very short, which cannot guarantee the firmness of the bolt or screw installation. Therefore, our company has improved the processing technology of the threaded hole in response to the above problems.

Method used

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  • Stretching processing technology of plate threaded hole
  • Stretching processing technology of plate threaded hole
  • Stretching processing technology of plate threaded hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 is basically as attached figure 1 and figure 2 Shown:

[0041] The threaded hole stretching processing technology of the plate adopts a special mold for processing the stretching hole. The special mold includes a pull-down mechanism and a cylindrical fixed mold 13. The pull-down mechanism includes a pull rod 10 and a pressure plate 11. The bottom of the pressure plate 11 is inverted. Conical, the bottom of the tie rod 10 is fixed on the hydraulic equipment, the upper part of the tie rod 10 is provided with a shoulder, the middle part of the pressure plate 11 is provided with a connecting hole, the diameter of the connecting hole is smaller than the diameter of the tie rod 10, and the top of the tie rod 10 passes through the connecting hole A lock nut 12 is threadedly connected, and the pressure plate 11 is fixed on the pull rod 10 through the lock nut 12 and the shaft shoulder.

[0042] The middle part of the fixed mold 13 is provided with a cylindrical ...

Embodiment 2

[0048] Embodiment 2 is basically as attached Figure 4 and Figure 5 Shown:

[0049] The difference from Embodiment 1 is that there are multiple slots evenly distributed on the hole wall of the slide hole, and balls 21 are rotatably connected in the slots, a part of the surface of the balls 21 is exposed from the slots, and a pair of balls are arranged in the fixed mold 13. 21 cooling mechanism for heat dissipation. In this embodiment, the cooling mechanism includes an annular circulation cavity 22 and a plurality of heat dissipation channels 23, wherein one end of the plurality of heat dissipation channels 23 communicates with the circulation cavity 22, and the other end communicates with each card slot. The bottom of 13 is provided with an oil inlet 24 and an oil outlet 25 communicating with the circulation chamber 22 , and the oil inlet 24 and the oil outlet 25 are arranged symmetrically with respect to the sliding chamber 18 .

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Abstract

The invention relates to the technical field of hole processing, and specifically discloses a stretching processing technology of a plate threaded hole. A special mold is used, and the special mold comprises a pull-down mechanism and a fixed mold; a cylindrical cavity is formed in the middle of the fixed mold, a turntable is formed in the middle of the fixed mold, a hole is formed in the middle ofthe turntable, the turntable is in threaded connection with the fixed mold, a sliding hole is formed in the bottom of the cylindrical cavity, the pull-down mechanism comprises a pull rod and a pressing plate, the pressing plate is detachably connected with the top of the pull rod, and the pull rod is slidingly connected in the sliding hole; the stretching processing technology comprises followingsteps of: forming small holes in a metal plate in advance, penetrating the pull rod through the small holes to be connected with the pressing plate after adjusting the distance between the turntableand the fixed mold, and connecting hydraulic equipment at the bottom of the pull rod; the hydraulic equipment drives the pull rod to move downwards, the metal plate generates deformation in the cylindrical cavity to form a stretching hole; and taking out the pull rod and the pressing plate, and carrying out tapping treatment to the inner wall of the stretching hole. The depth of the threaded holeobtained by adopting the technical solution of the invention is much greater than the thickness of the metal plate, and the firmness of a connecting piece in the threaded hole is improved.

Description

technical field [0001] The invention relates to the technical field of hole processing, in particular to a stretching processing technology for plate threaded holes. Background technique [0002] High-voltage distribution box refers to the electrical products used in power system power generation, transmission, distribution, power conversion and consumption to play on-off, control or protection, with a voltage level of 3.6kV ~ 550kV, mainly including high-voltage circuit breakers, high-voltage Disconnectors and grounding switches, high-voltage automatic reclosers and sectionalizers, and high-voltage switchgears. [0003] In order to reduce the weight of the distribution box for easy handling, the thickness of the metal plate used in the distribution box is relatively thin, about 1-2mm. Because the plate usually needs to be provided with threaded holes to fix other parts, but because the plate is thicker Thin, the length of the threaded section of the threaded hole opened in...

Claims

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Application Information

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IPC IPC(8): B23P15/00B23Q11/12
CPCB23P15/00B23Q11/126
Inventor 何鸿辉
Owner 重庆博顺电气有限公司
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