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Processing process for compressing and riveting nuts

A processing technology and a technology for pressing riveting nuts, which are applied in the field of processing technology of pressing riveting nuts, can solve the problems of seriousness, low strength and low production efficiency, and achieve the effects of dense internal structure, good tensile strength and material saving.

Active Publication Date: 2010-07-21
SUZHOU INDAL PARK XINKAI PRECISION FASTENERSCO
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Problems solved by technology

There are two traditional production techniques for this kind of rivet nut: the first is mechanical processing, the main feature of which is the use of automatic lathe processing, and the product can be processed and formed at one time. However, the disadvantages of this processing method are: a. Production The efficiency is relatively low, and only 6 pieces can be produced per minute; b, due to the influence of the tool, the quality stability of the product is poor; c, the material waste is serious, and the material utilization rate is 43.1%
The second processing method is casting processing. The main disadvantages of using this kind of processed rivet nut are that the precision of the rivet nut is reduced, the yield is low, and the strength of the casting is lower than that of the machined part, and there are shrinkage cavities at the same time. Defects

Method used

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  • Processing process for compressing and riveting nuts
  • Processing process for compressing and riveting nuts
  • Processing process for compressing and riveting nuts

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Embodiment Construction

[0011] A processing technology for pressure riveting nuts. Firstly, the raw material is blanked, and then the billet is cold-finished, and then the head is upset and compound-extruded, and then the front and back are compound-extruded, the spline and the lower mouth, and finally punched and extruded Hole, tap the inner hole. The raw material is a wire rod that has been spheroidized and annealed, and the surface has been lubricated. In order to easily form the hole when punching and extruding the hole, a small circular hole is back-extruded at the upper end during the above-mentioned forward and reverse compound extrusion.

[0012] combine figure 1 and figure 2 Take the M8-1 rivet nut as an example:

[0013] The product performance requirements are: pushing force ≥ 1871N, torque force ≥ 18.7N·M

[0014] Firstly, according to the three-dimensional simulation analysis software, the cold forging process, design mold making and material preparation are simulated, which saves a...

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Abstract

The invention relates to a processing process for compressing and riveting nuts. The invention is characterized by baiting the raw materials, cold-sizing the blanks, heading positively and composite extruding the head, then positively and negatively composite extruding jacquard gears and the lower nozzle position and at last impacting and extruding pressure holes to tap the inner holes. Metal streamlines are continuously distributed according to the shapes, and the interior tissues of the metal streamlines are compact so that the tensile strength at the lower nozzle position of compressing and riveting nut is better. The abrasion of a mould is small and has regular variation, thereby the property of the product is more stable. And the utilizing rate of the materials can reach 92%.

Description

technical field [0001] The invention relates to a metal plastic forming technology, in particular to a processing technology of a rivet nut. Background technique [0002] With the development of modern industry, electronic products are becoming more and more popular in every corner of our life, and electronic products are developing in the direction of miniaturization. Big. Among them, rivet nut fasteners are widely used in industries such as electronic products. There are two traditional production techniques for this kind of rivet nut: the first is mechanical processing, the main feature of which is the use of automatic lathe processing, and the product can be processed and formed at one time. However, the disadvantages of this processing method are: a. Production The efficiency is relatively low, and only 6 pieces can be produced per minute; b, due to the influence of the tool, the quality stability of the product is poor; c, the material waste is serious, and the mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J1/04B21C23/03
Inventor 张亚中管建伟
Owner SUZHOU INDAL PARK XINKAI PRECISION FASTENERSCO
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