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Method for machining inner gear rings

A processing method and the technology of the inner ring gear, which are applied in the processing field of the inner ring gear, can solve the problems of backward heat treatment technology, high processing cost, and low surface hardness, and achieve the goal of ensuring the deformation of the ring gear, reducing the processing cost, and improving the surface hardness Effect

Inactive Publication Date: 2012-07-18
江国辉
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Problems solved by technology

[0002] The automobile synchronizer ring gear is one of the important parts in the automobile transmission mechanism. Its processing quality, structure and service life directly affect the normal driving of the automobile and the personal safety of the drivers and passengers. my country's automobile industry started late, and its The heat treatment technology is relatively backward, such as the use of ion nitriding technology to process the inner ring gear, which can no longer meet the requirements of the current automobile. The ring gear is usually processed with medium carbon alloy steel such as 40Cr, which is first roughed, then quenched and tempered, and then finished. , and then nitriding, which can prevent the deformation of the ring gear, but its surface hardness is low, the hardened layer is shallow, and the processing cost is high. Now there is an urgent need for a method to solve these problems

Method used

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  • Method for machining inner gear rings
  • Method for machining inner gear rings

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Embodiment Construction

[0008] Such as figure 1 As shown, the present invention provides a processing method for an inner ring gear, which includes the following steps: Step 1, forging, select low-carbon alloy steel 20CrMnTiH material, reserve a margin according to the requirements of the drawings, and forge to form; Step 2, normalize , using isothermal normalizing technology, the normalizing temperature is 920-930°C, the isothermal temperature is 600-650°C, and the hardness after isothermal normalizing is 160-200HBW, which can eliminate the bad structure produced by forging and make the structure uniform; step 3, rough Turning, removing a large amount of allowance, and preliminarily forming the outer circle, hole, and end face; step 4, finishing turning, forming the outer circle, hole, end face, and seam according to the technical requirements; step 5, shaping the inner gear The tooth shape of the ring is processed and formed, and the tooth shape accuracy is guaranteed to be within 8 grades; Step 6,...

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Abstract

The invention discloses a method for machining inner gear rings. The method includes steps of forging, normalizing, rough lathing, finish lathing, gear shaping, carburizing, pressure quenching and shot blasting. By the aid of the method, surface hardness, core structure and depth of a hardened layer of a gear ring are improved, machining cost is lowered, deformation of the gear ring is avoided assuredly, accordingly, the service life of the gear ring is prolonged, and the load capacity of a vehicle is enhanced.

Description

technical field [0001] The invention relates to a processing method of an inner ring gear. Background technique [0002] The automobile synchronizer ring gear is one of the important parts in the automobile transmission mechanism. Its processing quality, structure and service life directly affect the normal driving of the automobile and the personal safety of the drivers and passengers. my country's automobile industry started late, and its The heat treatment technology is relatively backward, such as the use of ion nitriding technology to process the inner ring gear, which can no longer meet the requirements of the current automobile. The ring gear is usually processed with medium carbon alloy steel such as 40Cr, which is first roughed, then quenched and tempered, and then finished. , and then nitriding, which can prevent the deformation of the ring gear, but its surface hardness is low, the hardened layer is shallow, and the processing cost is high. Now there is an urgent ne...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D1/28C21D1/18C21D9/40
Inventor 江国辉
Owner 江国辉
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