CN101508003B - TC4 alloy large-size fan blade forged piece hot edge-cutting method - Google Patents

Abstract

The invention relates to a thermal trimming method for a forged piece of a TC4 alloy large-sized fan blade. The method has the advantages of high efficiency for removing flashes, little remainder of residual flashes and labor conservation for subsequent mechanical processing, and reduces the loss of a cutter. The method comprises the following steps: calculating the pressure required for removing the flashes in a thermal state according to the circumference of the forged piece of the TC4 large-sized fan blade and the thickness of a bridge part of the forged piece; then designing a convex die and a concave die of a trimming die according to a thermal forged piece of the TC4 large-sized fan blade; manufacturing the trimming die; accurately mounting the trimming die during forging, adjusting a clearance between the convex die and the concave die, ending forging the forged piece of the TC4 large-sized fan blade, and quickly transferring the forged piece to thermally trim on the trimming die; and after thermally trimming, quickly transferring the forged piece to a forging die to carry out light-knock shaping.

Description

TC4 alloy large-size fan blade forged piece hot trimming method

(1) technical field

The present invention relates to the Forging Technology field of blade of aviation engine forging, concrete TC4 alloy large-size fan blade forged piece hot trimming method.

(2) background technology

Usually the removal of aero-engine large-size fan blade forged piece overlap mainly contains two kinds of methods at present, and the one, sawing is carried out with special-purpose band saw in the cooling back, and its special-purpose band saw price height and saw blade very easily rupture; The 2nd, carry out milling with milling machine, the method is removed milling machine of a slice overlap and is needed a working day approximately, and production efficiency is low.

(3) summary of the invention

At the problems referred to above, the invention provides TC4 alloy large-size fan blade forged piece hot trimming method, it removes the efficient height of overlap, and residual overlap surplus is few, for follow-up machining is saved man-hour, and has reduced the loss of cutter.

Its technical scheme is such, it is characterized in that: it may further comprise the steps:

1, according to the bridge portion THICKNESS CALCULATION of the girth of TC4 large-size fan blade forged piece and forging required pressure in the hot deburring of going down;

2, design the punch and the die of edger according to the hot forging of TC4 large-size fan blade;

3, make edger;

When 4, forging, edger is installed correctly, is adjusted clearance between punch and die, the TC4 alloy large-size fan blade forged piece forges and finishes, and transfers to hot trimming on the edger fast;

5, transfer to again fast after earnestly and touch shaping on the forging die.

It is further characterized in that: the cutting edge gap of described punch-die is monolateral to be 0.8mm～1.2mm; The step of described edger manufacturing is:

(1), the reclamation of wasteland of getting the raw materials ready of 45 steel, adopt the line cutting to cut out punch from the square material, remaining is exactly die;

(2), the groove of punch-die cutting edge is handled and chamfering;

(3), punch-die utilizes Numeric Control Technology to carry out milling respectively;

(4), the milling punch-die modifier treatment that finishes, the 5CrNiMo of groove built-up welding all around wlding;

(5), built-up welding finishes the repair clearance between punch and die.

Use TC4 alloy large-size fan blade forged piece hot trimming method of the present invention, it removes the efficient height of overlap, and residual overlap surplus is few, for follow-up machining is saved man-hour, and has reduced the loss of cutter in a large number, has reduced production cost.

(4) description of drawings

Fig. 1 is punch-die structural representation in the technology of the present invention.

(5) specific embodiment

The process of technology of the present invention once is described below:

1, according to the bridge portion THICKNESS CALCULATION of the girth of TC4 large-size fan blade forged piece and forging required pressure in the hot deburring of going down, be about 900 tons through calculating the required pressure of TC4 large-size fan blade forged piece, clipping press nominal tonnage is 1250 tons at present, meets the demands fully;

2, according to the punch and the die of the hot forging design of TC4 large-size fan blade edger, the cutting edge gap of punch-die is monolateral to be 0.8mm～1.2mm, and the best is 1.0mm;

3, make edger;

4, forge, edger correctly is installed, adjust clearance between punch and die, the TC4 alloy large-size fan blade forged piece forges and finishes, and transfers to hot trimming on the edger fast;

5, transfer to again fast after earnestly and touch shaping on the forging die.

Wherein, the manufacture process of edger comprises:

(1), the reclamation of wasteland of getting the raw materials ready of 45 steel, adopt the line cutting to cut out punch from the square material, remaining is exactly die;

(2), the groove of punch-die cutting edge is handled and chamfering;

(3), punch-die utilizes Numeric Control Technology to carry out milling respectively;

(4), the milling punch-die modifier treatment that finishes, the 5CrNiMo of groove built-up welding all around wlding;

(5), built-up welding finishes the repair clearance between punch and die.

Among Fig. 1,1 is punch, and 2 is die.

Claims (3)

1.TC4 alloy large-size fan blade forged piece hot trimming method, it is characterized in that: it may further comprise the steps,

(1), according to the bridge portion THICKNESS CALCULATION of the girth of TC4 large-size fan blade forged piece and forging required pressure in the hot deburring of going down;

(2), design the punch and the die of edger according to the hot forging of TC4 large-size fan blade;

(3), make edger;

(4), when forging, edger is installed correctly, adjust clearance between punch and die, the TC4 alloy large-size fan blade forged piece forges and finishes, and transfers to hot trimming on the edger fast;

(5), transfer to again fast after earnestly and touch shaping on the forging die.

2. TC4 alloy large-size fan blade forged piece hot trimming method according to claim 1 is characterized in that: the cutting edge gap of described punch-die is monolateral to be 0.8mm～1.2mm.

3. TC4 alloy large-size fan blade forged piece hot trimming method according to claim 2, it is characterized in that: the step of described edger manufacturing is:

(1), the reclamation of wasteland of getting the raw materials ready of 45 steel, adopt the line cutting to cut out punch from the square material, remaining is exactly die;

(2), the groove of punch-die cutting edge is handled and chamfering;

(3), punch-die utilizes Numeric Control Technology to carry out milling respectively;

(4), the milling punch-die modifier treatment that finishes, the 5CrNiMo of groove built-up welding all around wlding;

(5), built-up welding finishes the repair clearance between punch and die.

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