CN102921965B - Cutting processing method for room temperature vulcanization (RTV) silicon resin part containing hollow glass beads - Google Patents

Abstract

A cutting processing method for a room temperature vulcanization (RTV) silicon resin part containing hollow glass beads comprises performing cutter selection by trial cutting; determining a cutter for processing an RTV silicon resin coating; selecting a lathe device; determining cutting parameters which comprise a rotating speed, a cutting depth and the feeding amount; performing trial cutting on a plurality of cutters, comparing the cutting parameters and the influences on luminosity of the surface of the part, adjusting the cutting parameters again if the parameters are not reasonable and layer flaking and bubbles occur so that inaccuracy of dimensional tolerance, high roughness and coating damage are caused; or else directly performing cutting processing of the part. According to the cutting processing method for the RTV silicon resin part containing the hollow glass beads, the bottlenecks that an RTV silicon resin material can only be formed by pouring, the dimensions are inaccurate and performances of an engine are influenced are solved. After on-site application, the processing effect of the coating is extremely good, the state is stable, the application prospect is wide, and the coating can be used on engines of other models.

Description

A kind of cutting working method of the RTV silicones part containing hollow glass bead

Technical field

The invention belongs to Machining Technology field, be specifically related to a kind of cutting working method of the RTV silicones part containing hollow glass bead.

Background technology

A kind of processing of the RTV silicones containing hollow glass bead in aeroengine compressor casing, due to this kind of coating mostly be once water shaping, without the need to machining, before this technology of research, therefore never cut the processing method of this kind of coating.

Summary of the invention

The object of the present invention is to provide a kind of cutting working method of the RTV silicones part containing hollow glass bead, comprise the following steps:

Step 1: cut by trial cut and carry out cutting tool choice;

According to the size of the kind of RTV silicone coatings, the hardness of coating and structure, part, processing capacity and surface roughness requirements, carry out trial cut by the cutter of multiple material and cut;

Step 2: determine the cutter processing RTV silicone coatings;

Step 3: lathe equipments is selected;

If diameter of part is more than 800mm, select NC vertical lathe, otherwise select numerical-control horizontal lathe;

Step 4: determine cutting parameter, comprises rotating speed, cutting depth and the amount of feeding;

Trial cut cuts multiple cutter, relatively cutting parameter and the impact on piece surface luminosity, if parameter is unreasonable namely occur aliquation and bubble, can cause the high and damage coating of dimensional tolerance inaccuracy, roughness, need cutting parameter be readjusted, otherwise directly carry out step 5;

Because silicones has nonmetal characteristic, during cutting, cooling medium can not be added, in order to avoid reduce part service life;

Step 5: the cutting parameter determined according to step 4, carries out the machining of part.

Beneficial effect:

The cutting working method of the RTV silicones part containing hollow glass bead provided by the invention, having broken away from RTV silicone material only can rely on pouring shaping, size inaccuracy, affect the bottleneck of engine performance, this method achieves the machining containing hollow glass bead silicones first, change in the past traditional idea: part only can water shaping, accurately can not ensure fit dimension, start a new Machining Technology, and after applying at the scene, coating processing effect is fine, in stable condition, have a extensive future, can extend on other model engine and use.

Accompanying drawing explanation

Fig. 1 is the RTV silicones design of part schematic diagram containing hollow glass bead of a kind of embodiment of the present invention, wherein, and 1-silicones region.

Detailed description of the invention

Below in conjunction with accompanying drawing, a kind of embodiment of the present invention is elaborated.

As shown in Figure 1, this part is the part having watered depositing silicon resin to the RTV silicones part containing hollow glass bead of the present embodiment, and diameter is φ 300.

The above-mentioned RTV silicones part containing hollow glass bead is carried out to the method for machining, comprises the following steps:

Step 1: cut by trial cut and carry out cutting tool choice;

According to the size of the kind of RTV silicone coatings, the hardness of coating and structure, part, processing capacity and surface roughness requirements, carry out trial cut by the cutter of multiple material and cut;

Select multiple cutter to carry out on-the-spot test specimen cutting test, test parameters is as follows:

Step 2: determine the cutter processing RTV silicone coatings;

1) processing is through the surface luminous intensity of the silicones of vacuum pouring compared with the surface of the silicones of antivacuum cast, and bubble reduces, and surface roughness improves greatly;

2) diamond blade is sharper than hard alloy coated blade, is applicable to cutting silicone material, obtains higher surface roughness;

3) high rotating speed can obtain higher surface roughness;

In the present embodiment, the best cutter of selection is R0.4 Iscar diamond blade, and model is GIMY315;

Step 3: lathe equipments is selected;

According to design of part, processing dimension and accuracy requirement, select lathe equipments: if diameter of part is more than 800mm, select NC vertical lathe, otherwise select numerical-control horizontal lathe;

The lathe equipments selected in the present embodiment is high-revolving numerical control vertical lathe, and model is YV-1000ATC;

Step 4: determine cutting parameter, comprises rotating speed, cutting depth and the amount of feeding;

Trial cut cuts multiple cutter, relatively cutting parameter and the impact on piece surface luminosity, if parameter is unreasonable namely occur aliquation and bubble, will cause the high and damage coating of dimensional tolerance inaccuracy, roughness, need cutting parameter be readjusted, otherwise directly carry out step 5;

Because silicones has nonmetal characteristic, during cutting, cooling medium can not be added, in order to avoid reduce part service life;

The cutting parameter determined is as follows:

Rotating speed: n=190 ~ 200r/min(linear velocity V ≈500m/min)

The amount of feeding: f=0.08 ~ 0.1mm/r

Cutting depth: ap=0.1 ~ 0.3mm;

Step 5: the cutting parameter determined according to step 4, carries out the machining of part.

Claims (1)

1., containing a cutting working method for the RTV silicones part of hollow glass bead, the English full name of described RTV is Room temperature vulcanized, it is characterized in that: comprise the following steps:

Step 1: cut by trial cut and carry out cutting tool choice;

According to the size of the kind of RTV silicone coatings, the hardness of coating and structure, part, processing capacity and surface roughness requirements, carry out trial cut by the cutter of multiple material and cut;

Step 2: determine the cutter processing RTV silicone coatings;

Step 3: lathe equipments is selected;

According to design of part, processing dimension and accuracy requirement, select lathe equipments: if diameter of part is more than 800mm, select NC vertical lathe, otherwise select numerical-control horizontal lathe;

Step 4: determine cutting parameter, comprises rotating speed, cutting depth and the amount of feeding;

Trial cut cuts multiple cutter, relatively cutting parameter and the impact on piece surface luminosity, if parameter is unreasonable namely occur aliquation and bubble, can cause the high and damage coating of dimensional tolerance inaccuracy, roughness, need cutting parameter be readjusted, otherwise directly carry out step 5;

Because silicones has nonmetal characteristic, during cutting, cooling medium can not be added, in order to avoid reduce part service life;

Step 5: the cutting parameter determined according to step 4, carries out the machining of part.