Unlock instant, AI-driven research and patent intelligence for your innovation.

A processing method for locking groove milling cutter

A processing method and technology for locking grooves, which are applied in the field of milling cutter processing, can solve the problems of difficulty in guaranteeing the processing of locking grooves on steam turbine blades, low production efficiency, and easy chipping of tools, so as to solve the problem of difficult processing and improve production efficiency. , the effect of meeting the accuracy requirements

Active Publication Date: 2017-02-01
HARBIN TURBINE
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing locking groove milling cutter has a narrow blade structure. During the subsequent grinding process, the cutter is very easy to be chipped, broken and overheated and annealed, causing the cutter to be scrapped. The problem of low efficiency, and then provide a locking groove milling cutter processing method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A processing method for locking groove milling cutter
  • A processing method for locking groove milling cutter
  • A processing method for locking groove milling cutter

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific implementation mode one: combine Figure 1-Figure 3 Illustrate, a kind of locking slot milling cutter processing method of the present embodiment is carried out according to the following steps:

[0016] Step 1. Turn the outer circle and end face of the bar with a diameter of 70mm and a length L of 165mm: one end of the bar is turned into a counterbore with a diameter d of 50mm and a depth of 1mm, and the center hole is drilled with a center drill. Drill and tap the thread at one end and use 60° countersink to countersink the conical countersink hole with a cone angle α of 60°. The outer circle S of the blade has a grinding allowance of 0.5mm, the width W of the blade is 2±0.01mm and the grinding allowance is 0.5mm. The depth H is 4±0.02mm, and the grinding amount of Mohs No. 4 taper shank 2 is 0.5mm; the cutting parameters are: speed 230-250r / min, feed rate 0.2-0.3mm / r, cutting depth 2mm;

[0017] Step 2. Milling teeth 1: the number of teeth Z=12, the rake an...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the cutting parameters in step 1 are: rotational speed 240 r / min, feed rate 0.25 mm / r, and cutting depth 2 mm. Such setting can ensure the precise machining of the outer circle of the blade, the width of the blade and the depth of the teeth. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the cutting parameters in step 2 are: rotational speed 200r / min, feed rate 0.15mm / r, cutting depth 8mm. Such setting can ensure the precise machining of the number of teeth and the tooth grooves. Others are the same as in the first or second embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a milling cutter machining method, in particular to a locking slot milling cutter machining method. The problems that due to the fact that an existing locking slot milling cutter is of a narrow blade structure, during follow-up grinding machining, a cutter is prone to tipping, breakage and overheating annealing, the cutter is scrapped, it is difficulty ensured that a locking slot in a turbine blade is machined, and the production efficiency is low are solved. The machining method mainly comprises the steps of 1, lathing a bar, 2, milling teeth, 3, milling tooth back steps, 4, conducting heat treatment, 5, conducting center lapping, 6, grinding a standard rack face, 7, grinding standard tooth depth and a conical tail handle through a cylindrical grinding machine, 8, conducting relief grinding on the tooth back through a relieving machine, and 9, conducting packaging and machining an obtained locking slot milling cutter. The locking slot milling cutter machining method is used for machining a locking slot in a turbine blade.

Description

technical field [0001] The invention relates to a milling cutter processing method, in particular to a locking groove milling cutter processing method for processing a locking groove on a steam turbine blade. Background technique [0002] The locking groove milling cutter is a special tool for machining the locking groove on the steam turbine blade. The groove width and groove depth of the locking groove on the blade are processed by this tool at one time. Due to the special structure of the blade locking groove (narrow groove, deep groove), the groove width is 2±0.02mm, the groove depth is 4±0.03mm, the blade width of the required tool is 2±0.01mm, and the milling cutter has a narrow blade structure , During the subsequent grinding process, the tool is easily chipped, broken and overheated and annealed, resulting in the scrapping of the tool, so it has been outsourced for processing, but the manufacturing cost is high and the processing cycle is long. In order to reduce th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/34
CPCB23P15/34
Inventor 徐桂菊孙盛丽王立峰王国庆宋光伟孙杨
Owner HARBIN TURBINE