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Broaching method and special tool for high-accuracy small-sized mortises

A high-precision, small-sized technology, applied in the broaching of small-sized tongue and groove, the broaching method of high-precision small-sized tongue and groove and its special tool, and the high-precision field of disc parts, which can solve the problems of high processing difficulty and influence. Machining quality and broach life, broach chipping and chipping

Inactive Publication Date: 2013-05-01
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous improvement of thrust-to-weight ratio and performance of the engine, the structure of the turbine disc parts has also undergone great changes. The tenons and grooves connected with the blades are not only large in number and small in size, but also require high precision and are difficult to process, especially the tenon and groove The structural size is special, the arc pelvic floor is wide, and the notch of the neck is small. For the processing of this kind of tenon and groove, the traditional broaching scheme and broach structure design are easy to cause broach chipping, edge chipping, and knife breaking. , which seriously affects the processing quality and the life of the broach, and cannot meet the dimensional accuracy and technical requirements of the part

Method used

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  • Broaching method and special tool for high-accuracy small-sized mortises
  • Broaching method and special tool for high-accuracy small-sized mortises
  • Broaching method and special tool for high-accuracy small-sized mortises

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A special tool for the broaching method of high-precision small-sized tongue and groove, the special tool is a broach, and its structure meets the following requirements: the tooth tip of the broach is provided with straight chamfers or / and rounded chamfers that can participate in broaching .

[0084] There are 11 forming broaches in the whole set; Among them: the 1st to 3rd broaches are coarse grooving knives, with 45° chamfers on the top and both sides of the tooth, forming a 45° side cutting edge, which can be involved with the tooth top edge at the same time Cutting; the 4th to 7th broach tooth-shaped grooving knives are all side oblique broaching methods, and the side edge is the main cutting edge; the 8th broach groove bottom R knife, the top of the tooth and both sides are transferred to the fillet R1 .5 is the main cutting, which is used to complete the broaching of the groove bottom profile; the 9th broach for the rough surface of the notch, the 10th broach for...

Embodiment 2

[0103] A broaching method for high-precision and small-sized mortise and groove: use a special broach to process the workpiece; the special broach structure meets the following requirements: the tooth top of the broach is equipped with a straight Chamfers and / or fillets;

[0104] The method for broaching the high-precision and small-sized tongue and groove meets the following requirements:

[0105] The removal method of broaching allowance is: use the main cutting edge of the tooth top of the broach or / and the chamfering part of the broaching tool, and the chamfering part of the broaching tool is the straight chamfering or / and rounding on both sides of the tooth top cutting edge Chamfer;

[0106] A complete set of 11 forming broaches are used in order to complete the entire contour shape of the tongue and groove; among them: the 1st to 3rd broaches are rough slotting knives, with 45° chamfers on the tooth top and both sides, forming a 45° The side cutting edge participates i...

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Abstract

The invention discloses a broaching method and a special tool for high-accuracy small-sized mortises. A special broaching tool is used for machining a to-be-machined workpiece. The structure of the special broaching tool meets the requirement that straight chamfers or / and round chamfers capable of participating in broaching are arranged on tooth crests of the broaching tool. The broaching method for the high-accuracy small-sized mortise meets the requirements that a broaching machining allowance elimination mode comprises the step of machining the workpiece by using main blades on the tooth crests of the broaching tools or / and the chamfer parts of the broaching tools, and the chamfer parts of the broaching tool are the straight chamfers or / and the round chamfers on the two sides of blades on the tooth crests; and totally 11 broaching tools are formed into a complete set, and are sequentially used for machining all the contour shapes of the mortises. The method and the special tool are mainly applied to the broaching machining of mortises of core parts of aero-engines and gas turbines such as turbine disks and air compressor disks, can be popularized and used for like parts, and have broad application prospect in a series of new-generation aero-engines and gas turbines, and a technical bottleneck in the broaching of specially-structured high-accuracy small-sized mortises is solved.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, focusing on a high-precision, small-sized tenon and groove broaching method for disk parts; in particular, a high-precision and small-sized tenon and groove broaching method and a special tool thereof are provided. Background technique [0002] In mechanical processing technology, especially in the manufacturing of aero-engine and gas turbine disc parts, tongue and groove broaching has always been the key technology of disc parts processing, and this type of technology has always attracted attention. With the continuous improvement of thrust-to-weight ratio and performance of the engine, the structure of the turbine disc parts has also undergone great changes. The tenons and grooves connected with the blades are not only large in number and small in size, but also require high precision and are difficult to process, especially the tenon and groove The structural size is special, the...

Claims

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Application Information

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IPC IPC(8): B23D43/00B23D37/22
Inventor 姜雪梅徐新发刘红伟谭薇李成武
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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