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A machining process of connecting rod

A technology of machining and processing technology, applied in the field of machining, can solve the problems of difficulty in guaranteeing machining accuracy, adverse effects on the quality and output of connecting rods, and inability to guarantee the requirements of parallelism, so as to improve production efficiency and machining accuracy, shorten assembly The time of the clip, to ensure the effect of the design requirements

Active Publication Date: 2018-10-09
贵州新安航空机械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ① During processing, the card positioning needs to be positioned through the outer circle or the groove, but after the grooving process is completed, the grooving will be deformed, and the parallelism requirements cannot be guaranteed;
[0005] ②When grooving, the processing allowance required by the punching machine is large, the electrode is seriously worn out, and serious carbon deposits will be generated, which will affect the processing of the part size. The processing is time-consuming, the production efficiency is low, and the processing accuracy is difficult to guarantee.
[0006] The above two factors have adversely affected the quality and yield of connecting rods

Method used

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  • A machining process of connecting rod

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Experimental program
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Effect test

Embodiment 1

[0043] A mechanical processing technology of a connecting rod, the connecting rod includes a connecting rod body 5, the connecting rod body 5 is cylindrical, and its two connecting ends are respectively provided with a through hole 1 and a square groove body 3, and the square groove body 3. The outer end is also provided with an end groove 4, and the connecting rod body 5 is also provided with a strip-shaped groove body 2. The processing technology of the connecting rod includes the following steps:

[0044] ① blanking;

[0045] ②Heat treatment: quench and temper the blank, and prepare for processing. During quenching and tempering, the quenching temperature is 830-835°C, and the tempering temperature is 660-665°C;

[0046] ③Turning outer circle: rough turning and finishing turning outer circle according to the margin required by the process drawings;

[0047] ④ Car shape: According to the structure of the drawing, the two ends of the car are connected, and the two ends are t...

Embodiment 2

[0057] A machining process for a connecting rod as described in Embodiment 1, comprising the following steps:

[0058] ① blanking;

[0059] ②Heat treatment: quench and temper the blank, and prepare for processing. During quenching and tempering, the quenching temperature is 855-860°C, and the tempering temperature is 675-680°C;

[0060] ③Turning outer circle: rough turning and finishing turning outer circle according to the margin required by the process drawings;

[0061] ④ Car shape: According to the structure of the drawing, the two ends of the car are connected, and the two ends are trimmed;

[0062] ⑤ Grinding the outer circle: Grinding the connecting rod body so that the roughness of the connecting surface at both ends reaches 3.2;

[0063] ⑥ Drilling: drill through hole 1 according to the drawing size, deburr and chamfer the hole;

[0064] ⑦Milling elongated groove: process the elongated groove 2 on the connecting rod body 5 according to the drawing size, deburr arou...

Embodiment 3

[0071] A machining process for a connecting rod as described in Embodiment 1, comprising the following steps:

[0072] ① blanking;

[0073] ②Heat treatment: quench and temper the blank, and prepare for processing. During quenching and tempering, the quenching temperature is 845-850°C, and the tempering temperature is 668-673°C;

[0074] ③Turning outer circle: rough turning and finishing turning outer circle according to the margin required by the process drawings;

[0075] ④ Car shape: According to the structure of the drawing, the two ends of the car are connected, and the two ends are trimmed;

[0076] ⑤ Grinding the outer circle: Grinding the connecting rod body so that the roughness of the connecting surface at both ends reaches 3.2;

[0077] ⑥ Drilling: drill through hole 1 according to the drawing size, deburr and chamfer the hole;

[0078] ⑦Elongated groove milling: process the elongated groove body 2 on the connecting rod body 5 according to the drawing size, deburr...

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Abstract

The invention discloses a machining process for a connecting rod and belongs to the technical field of machining. The process comprises the following steps: blanking; thermal treatment; cylindrical turning; shape turning; cylindrical grinding; drilling; elongated groove milling; square groove milling; end groove milling; cleaning; thermal treatment; inspection and the like. According to the technical scheme, problems of great machining amount, great loss of electrodes and severe carbon deposit in a routing step are avoided by replacing the routing step of the square groove by groove milling, so that the production efficiency and the machining precision are improved; the machining step of the end groove is adjusted to be later than the machining step of the square groove, so that the problem of deformation of the end groove is avoided when the square groove is machined, and the demand on depth of parallelism of the end groove is guaranteed; the elongated groove, the square groove and the end groove are machined by a milling machine, and the three grooves can be machined by clamping once, so that the clamping time in groove machining is shortened, the production efficiency is improved, and the design demand of the depth of parallelism of the groove surface is further effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a mechanical processing of a connecting rod, in particular to a processing technology of a connecting rod. Background technique [0002] The original processing process of the connecting rod is: blanking, heat treatment, turning outer circle, grinding outer circle, turning shape, drilling, deburring, grooving, deburring, grooving, deburring, cleaning, inspection. [0003] There are two problems in the slotting process: [0004] ① During processing, the card positioning needs to be positioned through the outer circle or the groove, but after the grooving process is completed, the grooving will be deformed, and the parallelism requirements cannot be guaranteed; [0005] ②When grooving, the processing allowance required by the punching machine is large, the electrode is seriously worn out, and serious carbon deposits will be generated, which will affect the processing o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 杨昌金
Owner 贵州新安航空机械有限责任公司