Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip

A connecting rod big-end, split-type technology, applied in the field of laser-initiated detonation cracking processing technology, can solve the problems of high requirements for equipment and processing conditions, low cracking efficiency, and high processing costs, saving processing equipment and cracking. The effect of high efficiency and reduced processing cost

Active Publication Date: 2015-06-03
XI AN JIAOTONG UNIV
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Problems solved by technology

The existing cracking methods often have high requirements on equipment and processing conditions, and can only process a single connecting rod at the same time, resulting in high processing costs, low cracking efficiency, and complicated operations.

Method used

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  • Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip
  • Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip
  • Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] A detonation cracking processing technology of laser detonation at the large end of a split connecting rod, comprising the following steps:

[0024] Step 1. Refer to figure 1 , two cleavage grooves 19 are machined by a broach or laser on the inside of the big head hole of the connecting rod 8. The cleavage groove 19 is sharp-angled and deep groove-shaped, with a depth of 0.4-0.6mm, an opening angle of 0-90°, and a sharp-angle curvature radius of 0.1- 0.3mm;

[0025] Step 2. Refer to figure 2 and image 3 , put more than two connecting rods 8 stacked into the bottom box 2, place the detonation body 4 and the expansion medium 7 in the big end hole of the connecting rod 8, press the cover plate 1 to compress, and pass the bolt 11 And nut 12 fastening;

[0026] Step 3: Trigger the high-voltage ball gap switch 18 to close through the laser 14, apply a...

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Abstract

Disclosed is a split-type detonation fracture splitting machining technology of laser initiation of a connecting rod tip. The technology includes: before fracture splitting, machining two fracture splitting grooves in the inner side of the big end hole of each connecting rod through a broach or laser; loading more than two connecting rods into a bottom plate box in an overlapping manner, placing a detonation subject and an expanding medium in the big end hole of the connecting rods and pressing through a pressing cover plate; trigging a high-pressure ball gap switch through the laser to be switched on during fracture splitting, 30-100KA pulsed heavy current is exerted to a copper wire penetrating the detonation subject which is detonated to generate transient high-energy high-pressure shock waves to exert dynamic load to the inner wall of the big end hole of the connecting rods, and fracture tips of the fracture splitting grooves are enabled to loss stability to be expanded to form entire fracture shearing surfaces. By the arrangement, fracture splitting for more than two connecting rods can be realized at one step, fracture splitting efficiency is high, the combined fracture surfaces are interlocked and high in resistance to shear bearing capacity, machining equipment is effectively saved, and machining cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of connecting rod cracking processing, and in particular relates to a detonation cracking processing technology of laser detonation at the large end of a split connecting rod. Background technique [0002] The traditional connecting rod manufacturing process mainly includes split type and integral type. In both processes, multiple machining processes such as pulling and grinding are required on the joint surface of the connecting rod body and the connecting rod cover, and the processing cost is high. The positioning accuracy is low, and the positioning pin hole of the connecting rod cover requires high machining accuracy. [0003] The connecting rod cracking process is a new process of connecting rod processing. Using the theory of fracture mechanics, firstly, a cracking groove is prefabricated inside the big end hole of the connecting rod to form an initial crack, and then a radial force is applied to the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/00
CPCB23P17/00
Inventor 赵升吨董渊哲朱成成张超
Owner XI AN JIAOTONG UNIV
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