CN108480930A - A kind of processing method of low-pressure compressor casing - Google Patents

Abstract

The present invention relates to a kind of processing methods of low-pressure compressor casing, include the following steps：The first step, blank inspection：Second step, vehicle benchmark；Third walks, spinning：Blank is subjected to draw spinning using strength cnc spinning machine, obtains the workpiece of wall thickness δ and roundness control within 0.1mm, a small amount of surplus is reserved for subsequent mechanical processing in both ends；4th step, cleaning：The lubricant of piece surface is cleaned up；5th step, heat treatment：Spinning stress is eliminated in heat treatment；6th step, smart car front end and rear end：7th step bores boring both ends end-face hole：8th step, punching press blade profile slot：Blade profile slot and refine are rushed by workpiece is radial equidistant using numerical control press, ensure blade profile groove location degree 0.2mm, blade profile channel profiles degree 0.05mm；9th step, Magnetic testing；Tenth step is examined, storage.The present invention disclosure satisfy that casing Deformation control, quality control on the surface, cost control requirement.

Description

A kind of processing method of low-pressure compressor casing

Technical field

The present invention relates to aero-engines, and in particular to a kind of processing method of low-pressure compressor casing.

Background technology

Current aerospace engine low-pressure compressor casing is processed using the method for turning+milling, and removal surplus is larger, Workpiece residualinternal stress is big, causes workpiece deformation larger, while easy ting produce fine defects-fine fisssure through casing processing rear surface Line, while turning and milling cost are higher.

" a kind of opposite opened casing high-efficiency milling processing technology " disclosed in CN 107717029A, is walked using cycloid milling Cutter track diameter, big cutting-in, it is small cut it is wide, feed technological parameter soon, step is：High-efficiency milling tool-path planning；Using big cutting-in, small cut Wide, roughing feed speed mode, Optimizing Cutting Conditions；High-efficiency milling tool-path planning includes：The feed of selection helix, cycloid are opened pre- The feed path of processing groove；The feed path for selecting cycloid reciprocal；Arc transition is used between cycloid, avoids right-angled bend.It should Method be applied in Split Casing in Aeroengine outer mold surface Milling Machining using cycloid feed path, big cutting-in, it is small cut it is wide, The processing method fed soon, the advantage grown using tool blade, is applied in Split Casing external form Milling Machining, is improved cutter and is utilized Rate realizes the high-efficient milling of Split Casing, improves processing efficiency in terms of reducing cost and improving processing efficiency.

" a kind of aluminium alloy thin-walled revolving body spinning processing method " that CN 105537449B bulletins authorize, making require ruler Very little aluminum alloy rotary green compact material makes annealing treatment aluminum alloy rotary green compact material；Shear spinning is at a conically shaped；To a conically shaped It is made annealing treatment, and cuts big end process allowance and form secondary conically shaped；By secondary conically shaped conventional spinning on spinning machine At pre- aluminium alloy thin-walled revolving body；The green compact material that will prewhirl carries out annealing and surface polishing treatment, is then cut using plasma Cutting mill cuts the process allowance at spinning part both ends, obtains the aluminium alloy thin-walled revolving body for meeting technological requirement.Utilize shear spinning It is processed into aluminium alloy thin-walled revolving body with conventional spinning technology, meets the size and structural performance requirements of bullet shell, Ke Yiqu For machine addition and punch wellding method, a kind of inexpensive, efficient processing method is provided for the processing of bullet Al-alloy casing.But The spinning processing method can't be directly used in manufacture aeroengine compressor casing.

Therefore, it is necessary to explore a kind of new technique, it is smaller to produce deformation, and quality is higher and lower-cost low pressure Compressor casing.

Invention content

Present invention aims at a kind of processing method of low-pressure compressor casing is provided, disclosure satisfy that casing Deformation control, Quality control on the surface, cost control requirement.

To achieve the above object, the scheme that the present invention uses is as follows：

A kind of processing method of low-pressure compressor casing, includes the following steps：

The first step, blank inspection：Blank material is D6AC high strength steels, and 800 DEG C of heat preservation 2-3h annealing detect the ruler of blank workpiece Very little, surface roughness and test tensile strength；

Second step, vehicle benchmark：Using numerical control vertical lathe Vehicle Processing blank workpiece benchmark, ensure reference plane flatness 0.05mm（In the least Rice）；

Third walks, spinning：The first clamping mold on strength cnc spinning machine, and lubricant is smeared, blank workpiece is installed later Gradually spinning is carried out by the numerical control program of setting on mold, obtains the workpiece of wall thickness δ and roundness control within 0.1mm, A small amount of surplus is reserved for subsequent mechanical processing in both ends；Using drawing bowl-type spinning roller, 30 ° of established angle, two passage spinning, A time spinning reduction 60%, spinning machine speed of mainshaft 20r/min, feed rate 1mm/r；Annealing destressing processing is carried out later, 500 DEG C of annealing temperature, the second passage are final spinning, spinning reduction 35%, spinning machine speed of mainshaft 20r/min, feed rate 0.4mm/r；

4th step, cleaning：It by the lubricant on 1 surface of workpiece and dirty is cleaned up with acetone；Standard is carried out for next step heat treatment It is standby；

5th step, heat treatment：Modifier treatment, quenching are carried out to the workpiece after spinning：850 DEG C, 15min, oil cooling；Tempering：600 DEG C, oil cooling；

6th step, smart car front end and rear end：The upper end of Vehicle Processing workpiece, installation side, seam allowance, the surplus that 1.5mm is reserved at coating It is processed for subsequent component, ensures diameter tolerance within ± 0.1mm, total high tolerance+0.10mm, circumference bounce free state Lower 0.1mm；

7th step bores boring both ends end-face hole：Both ends end face bolt through-hole is bored, ensures that position degree φ 0.2mm, both ends of the surface are angularly positioned PRECISION HOLE ensures position degree φ 0.05mm；

8th step, punching press blade profile slot：By clamping mould on numerical control press, workpiece is mounted on cavity plate, numerical control press is utilized It is radial equidistant on workpiece to rush blade profile slot 2 and refine, ensure blade profile slot 2 position degree 0.2mm, blade profile channel profiles degree 0.05mm； Aperture is removed by pincers worker sand paper simultaneously and remains burr, but retains sharp side, 0.075 δ mm of Dies ' Blanking gap；

9th step, Magnetic testing：Detect surface and the near surface flaw of workpiece；It is not allow for crackle, hairline and dotted impurity；

Tenth step is examined, storage：Workpiece is tested by design drawing requirement, it is mating for component to carry out package storage later；

For the present invention compared to the processing method of traditional aeroengine compressor casing, advantage is as follows：

A. in terms of quality：

Due to manufacturing casing using spinning process, material organizes further refinement after squeezing and flowing, finer and close, than before Forging intensity higher；Workpiece through spinning, chipping allowance is few, and part cutting stress is smaller, and deformation is smaller；It is punched the blade profile formed Slot consistency is preferable, and efficiency is higher.

B. in terms of cost：

In terms of blank：Spinning blank adds smaller with blank relative to machine, and cost is relatively low；

Production efficiency：Spinning+punching adds the period shorter relative to machine, and processing charges is low, efficient.

Description of the drawings

Fig. 1 is the process flow chart of the present invention；

Fig. 2 is the structural schematic diagram of casing；

Fig. 3 is the A of Fig. 2 to partial schematic diagram；

Fig. 4 is the axonometric drawing of the casing through machine-shaping of the present invention.

In figure：1-casing, 2-blade profile slots.

Specific implementation mode

Following further describes the present invention with reference to the drawings.

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of processing method of low-pressure compressor casing includes the following steps：

The first step, blank inspection：Blank material is D6AC high strength steels, and 800 DEG C of heat preservation 2-3h annealing detect the ruler of blank workpiece Very little, surface roughness and test tensile strength；

Second step, vehicle benchmark：Using numerical control vertical lathe Vehicle Processing blank workpiece benchmark, ensure reference plane flatness 0.05mm（In the least Rice）；

Third walks, spinning：The first clamping mold on strength cnc spinning machine, and lubricant is smeared, blank workpiece is installed later Gradually spinning is carried out by the numerical control program of setting on mold, obtains the workpiece of wall thickness δ and roundness control within 0.1mm, A small amount of surplus is reserved for subsequent mechanical processing in both ends；Using drawing bowl-type spinning roller, 30 ° of established angle, two passage spinning, A time spinning reduction 60%, spinning machine speed of mainshaft 20r/min, feed rate 1mm/r；Annealing destressing processing is carried out later, 500 DEG C of annealing temperature, the second passage are final spinning, spinning reduction 35%, spinning machine speed of mainshaft 20r/min, feed rate 0.4mm/r；

4th step, cleaning：It by the lubricant on 1 surface of workpiece and dirty is cleaned up with acetone；Standard is carried out for next step heat treatment It is standby；

5th step, heat treatment：Modifier treatment, quenching are carried out to the workpiece after spinning：850 DEG C, 15min, oil cooling；Tempering：600 DEG C, oil cooling；

6th step, smart car front end and rear end：The upper end of Vehicle Processing workpiece, installation side, seam allowance, the surplus that 1.5mm is reserved at coating It is processed for subsequent component, ensures diameter tolerance within ± 0.1mm, total high tolerance+0.10mm, circumference bounce free state Lower 0.1mm；

7th step bores boring both ends end-face hole：Both ends end face bolt through-hole is bored, ensures that position degree φ 0.2mm, both ends of the surface are angularly positioned PRECISION HOLE ensures position degree φ 0.05mm；

8th step, punching press blade profile slot：By clamping mould on numerical control press, workpiece is mounted on cavity plate, numerical control press is utilized It is radial equidistant on workpiece to rush blade profile slot 2 and refine, ensure blade profile slot 2 position degree 0.2mm, blade profile channel profiles degree 0.05mm； Aperture is removed by pincers worker sand paper simultaneously and remains burr, but retains sharp side, 0.075 δ mm of Dies ' Blanking gap；

9th step, Magnetic testing：Detect surface and the near surface flaw of workpiece；It is not allow for crackle, hairline and dotted impurity；

Tenth step is examined, storage：Workpiece is tested by design drawing requirement, it is mating for component to carry out package storage later；

Process above method is related to using strength cnc spinning machine（Model：ZENN-160CNC）, numerical control press（Model：ALD- 200）, spinning mold and indexing special equipments and the tooling such as fine blanking die.

Claims (1)

1. a kind of processing method of low-pressure compressor casing, includes the following steps：

The first step, blank inspection：Blank material is D6AC high strength steels, and 800 DEG C of heat preservation 2-3h annealing detect the ruler of blank workpiece Very little, surface roughness and test tensile strength；

Second step, vehicle benchmark：Using numerical control vertical lathe Vehicle Processing blank workpiece benchmark, ensure reference plane flatness 0.05mm；

Third walks, spinning：The first clamping mold on strength cnc spinning machine, and lubricant is smeared, blank workpiece is installed later Gradually spinning is carried out by the numerical control program of setting on mold, obtains the workpiece of wall thickness δ and roundness control within 0.1mm, A small amount of surplus is reserved for subsequent mechanical processing in both ends；Using drawing bowl-type spinning roller, 30 ° of established angle, two passage spinning, A time spinning reduction 60%, spinning machine speed of mainshaft 20r/min, feed rate 1mm/r；Annealing destressing processing is carried out later, 500 DEG C of annealing temperature, the second passage are final spinning, spinning reduction 35%, spinning machine speed of mainshaft 20r/min, feed rate 0.4mm/r；

4th step, cleaning：It by the lubricant on 1 surface of workpiece and dirty is cleaned up with acetone；Standard is carried out for next step heat treatment It is standby；

5th step, heat treatment：Modifier treatment, quenching are carried out to the workpiece after spinning：850 DEG C, 15min, oil cooling；Tempering：600 DEG C, oil cooling；

6th step, smart car front end and rear end：The upper end of Vehicle Processing workpiece, installation side, seam allowance, the surplus that 1.5mm is reserved at coating It is processed for subsequent component, ensures diameter tolerance within ± 0.1mm, total high tolerance+0.10mm, circumference bounce free state Lower 0.1mm；

7th step bores boring both ends end-face hole：Both ends end face bolt through-hole is bored, ensures that position degree φ 0.2mm, both ends of the surface are angularly positioned PRECISION HOLE ensures position degree φ 0.05mm；

8th step, punching press blade profile slot：By clamping mould on numerical control press, workpiece is mounted on cavity plate, numerical control press is utilized It is radial equidistant on workpiece to rush blade profile slot 2 and refine, ensure blade profile slot 2 position degree 0.2mm, blade profile channel profiles degree 0.05mm； Aperture is removed by pincers worker sand paper simultaneously and remains burr, but retains sharp side, 0.075 δ mm of Dies ' Blanking gap；

9th step, Magnetic testing：Detect surface and the near surface flaw of workpiece；It is not allow for crackle, hairline and dotted impurity；

Tenth step is examined, storage：Workpiece is tested by design drawing requirement, it is mating for component to carry out package storage later.