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Rolling processing method of sealing tooth lobe of exhaust connection pipe

A technology of exhaust pipe and processing method, which is applied in the field of sealing structure processing, can solve the problems of heavy workload and insufficient stability of tooth flaps, etc., and achieve the effects of facilitating processing, reducing processing allowance, and simplifying operation procedures

Active Publication Date: 2017-02-15
YICHANG MARINE DIESEL ENGINE
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AI Technical Summary

Problems solved by technology

The diameter of the inner flange of the connecting pipe is generally close to 2000mm, and the length of each tooth petal is 115mm, so an exhaust device needs about 50 tooth petals. If continuous riveting is used, the workload is too large, and the stability of the tooth petals is not enough. The unstable tooth lobe directly affects the subsequent turning process

Method used

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  • Rolling processing method of sealing tooth lobe of exhaust connection pipe
  • Rolling processing method of sealing tooth lobe of exhaust connection pipe
  • Rolling processing method of sealing tooth lobe of exhaust connection pipe

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Embodiment Construction

[0028] Such as Figure 1-7 Among them, a rolling processing method of exhaust joint sealing tooth lobe, comprising the following steps:

[0029] 1. Process the flaky tooth petal 1; the processed tooth petal 1 is as figure 1 As shown in , the processed tooth lobe 1 has a length of 115 mm, and an arc-shaped limiting groove 12 is processed on it, so that the installation groove 21 can be tightly combined with the tooth lobe 1 after deformation. In a preferred solution, pre-cutting is performed on the inner side of the tooth lobe 1, and a machining allowance of 0.1-0.3 mm is reserved. In this example, the reserved processing allowance is 0.2mm, and a step is formed inside the tooth lobe 1.

[0030] After pre-processing, the tooth flap becomes thinner, which makes it easier to bend the tooth flap into a circular arc, and the inner hole with higher roundness can be obtained after the tooth flap is assembled. Moreover, the machining allowance is reduced, and after the tooth flap i...

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Abstract

Provided is a rolling machining method of a sealing tooth section of an exhaust connecting pipe. The method comprises the steps that a sheet tooth section is machined; an installation groove for the tooth section is machined in the end face of the connecting pipe; the tooth section is machined to be of a circular arc shape with the radian approximate to that of an integrally-formed circular hole of the sealing tooth section; the tooth section is placed into the installation groove, and three points are uniformly and fixedly riveted on the rolling side to prevent the tooth section from moving; a rolling tool is installed on a vertical lathe, and the rolling machining portion of the connecting pipe is continuously rolled through the rolling tool to deform to extrude the tooth section; a correcting tool is installed on the vertical lathe, and correction is carried out on the inner side or the outer side of the tooth section through the correcting tool; finish turning is carried out on the tooth section. Through the steps, machining of the sealing tooth section of the exhaust connecting pipe is achieved, implementation is convenient, the operation process is simplified, and especially, the requirement for the machining precision of equipment is lowered.

Description

technical field [0001] The invention relates to the field of processing the sealing structure of a gas turbine exhaust joint, in particular to a rolling processing method for the sealing tooth lobe of the exhaust joint. The present invention is also applicable to other similar circular hole structures composed of multiple sheet structures processed on the end face of the flange. Background technique [0002] The exhaust connection pipe is one of the key components of the gas turbine, and the front flange end surface of the exhaust device has figure 1 Sealing teeth shown. sealing teeth, such as image 3 As shown, it is stainless steel 1Cr13 or similar material with a thickness of only 1.5~2.5mm. It is bent and installed on the end face groove of the inner flange of the exhaust pipe. The gap between the two adjacent pieces is 0.25±0.1mm. It is processed after being riveted. The inner hole has high precision requirements, the dimensional tolerance requirement is ±0.12mm, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P9/02B23P15/00
Inventor 赵宝栓孙源栋王嵩王磊胡婷婷刘征
Owner YICHANG MARINE DIESEL ENGINE
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