Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut

A technology of high-temperature alloy and forming process, which is applied in the field of precision forging, can solve problems such as easily damaged tools, and achieve the effects of increasing service life, improving fatigue resistance, and improving toughness

Inactive Publication Date: 2013-08-21
QINHAN PRECISION IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned extrusion molding method stress-drill

Method used

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  • Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut
  • Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut
  • Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut

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Experimental program
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Embodiment Construction

[0027] Take the MJ24X2 skirt-type self-locking hexagonal nut as an example: use Φ35mm bar stock, and cut the bar into 16±0.1mm bar sections. Machining is done first by turning one end face to the light, turning the car parallel to the other end to determine the total length, turning the length of the control rod section on the other end face to 15±0.1mm, turning the outer circle to Φ34.2+0.15mm, and turning a C2 angle. Put the machined billet into the shot blasting machine as a whole for shot blasting, and then coat the entire surface of the billet with lubricant. Among them, the lubricant is a830 lubricating oil produced by Jiashiduo Company.

[0028] combine image 3 , Figure 4 and Figure 5 After the above-mentioned treatment, the billet is cold-extruded in the cavity of the cold-extrusion molding die, and formed into a skirt with a short cylindrical straight step and a 45° conical skirt, the end face of the skirt with a concave center blind hole, an outer hexahedron an...

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Abstract

The invention discloses a cold-extrusion forming process of a high-temperature alloy high-strength skirt type self-locking hexagonal nut. The cold-extrusion forming process comprises the following steps of: firstly selecting a high-temperature alloy rod with a suitable casting diameter to do solid melting treatment; and then, carrying out extrusion on the rod section in a cold-extrusion forming mould to form an internal blind hole cavity of the nut, form a skirt bottom end cavity of the nut, form an outer hexagon of the nut and form a short cylinder straight footstep of the nut to be connected with a skirt of a cone of 45 degrees. After the high-temperature alloy high-strength skirt type self-locking hexagonal nut disclosed by the invention is extruded up and down, metal fibers are continuously distributed from the skirt to the hexagon; and the metal fibers in a hole can be vertically combed under the extrusion of strong extrusion force, so that the toughness of a product is improved.

Description

technical field [0001] The invention relates to the technical field of precision forging, in particular to a cold extrusion forming technology of high-strength skirt-type self-locking hexagonal nuts of high-temperature alloys. Background technique [0002] At present, the anti-retraction high-strength hexagonal nuts on the domestic market, such as figure 1 , this type of nut has no skirt seat, and there are six anti-retreat grooves connected symmetrically through the center in two pairs on the six sides of one end. The length of the groove accounts for about 1 / 3 of the total length of the nut. The anti-retreat groove is machined and milled. . market such as figure 2 The short cylindrical straight step skirt type anti-retreat high-strength nut shown is poor in manufacturability. It is machined into six sides and the fiber connecting the skirt is milled off. The strength is not good, and the skirt will yield when the bearing capacity is large. Sexual deformation. The curr...

Claims

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Application Information

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IPC IPC(8): B21C23/03B21C25/02
Inventor 辛选荣史颂华贺成松刘新成史志欣
Owner QINHAN PRECISION IND CO LTD
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