CN102152074A - Processing method of seamless joint of aluminum alloy - Google Patents

Abstract

The invention relates to a processing method of seamless joint of aluminum alloy, which is used for processing a semicircular revolving member. The processing method is characterized by comprising the following steps of: 1) carrying out final heat treatment in a blank state; 2) carrying out rough processing on a part; 3) cutting the part into two halves uniformly along an axle wire; 4) milling two cut surfaces; 5) carrying out low-temperature annealing process on semi-finished parts; 6) grinding joint surfaces on a grinding platform; 7) bonding the joint surfaces with industrial glue; 8) using a height ruler to draw a scribed line vertical to the joint surfaces on the bonded component; and 9) carrying out fine turning after the component is clamped, wherein the part automatically separates and become semicircle shaped after the final size and accuracy are reached, and the two parts which are processed in a grouping manner are marked with a set mark and assembled in a set manner. By the processing method, the reduction of the part accuracy due to deformation can be prevented in the processing process, the local size tolerance near the joint position, which is caused by the sliding of the parts relative to the joint surfaces in joint processing is prevented; simultaneously, the quantity of special clamps is reduced and the manufacturing cost is reduced.

Description

The involutory processing method of aluminium alloy seamless

Technical field

The present invention relates to the involutory processing method of a kind of aluminium alloy seamless, be applicable to the complete involutory high accuracy processing of semicircle revolving parts.

Background technology

Because project organization limitation or reduce assembly difficulty, revolving parts such as some lining and piston are designed to semicircle, when final assembling, installation need be grouped together two semicircular workpiece, bring into play the effect of whole revolving body, require the axiality of the circularity of the endoporus that involutory back forms and inside and outside circle cylinder generally very high,, following two kinds of processing methods arranged generally for this class part:

Method one: part roughing is to tubular piece, surfaces externally and internally stays suitable surplus, then tubular piece is cut into 2 semi-circular from the axis, 2 semi-circular is seamlessly spoted weld together after involutory again, carry out lonneal and eliminate part stress, last finish turning reaches designing requirement.

Method two: part roughing is to tubular piece, and surfaces externally and internally stays suitable surplus, then tubular piece is cut into 2 semi-circular from the axis, uses anchor clamps to fix two semi-circular, carries out finish turning and reaches designing requirement.

In the actual production, two kinds of processing methods respectively reflect some shortcomings: the part of employing method one processing is difficult to eliminate fully when lonneal owing to produce thermal stress during spot welding, finish the finish turning operation after, often there is distortion to exist, influences parts size precision and function of use; The part that adopts method two processing to anchor clamps precision and involutory processing before the dimensional requirement precision of half-finished parts very high, simultaneously, the clamping force of anchor clamps can not be excessive can not be too small, otherwise part since in distortion that clamping force produces and the process part with respect to the slip of involutory surface, cause parts size precision to descend, near the phenomenon of the dimension overproof involutory position.

Summary of the invention

The technical problem to be solved in the present invention provides the involutory processing method of a kind of aluminium alloy seamless, this method prevents that promptly the distortion that produces in the process from reducing element precision, prevent that again part from causing near the local overproof phenomenon of the size position with respect to the slippage of involutory surface in involutory processing, reduce the quantity of special fixture simultaneously, reduce manufacturing cost.

For overcoming the above problems, concrete technical scheme of the present invention is as follows: the involutory processing method of a kind of aluminium alloy seamless is characterized in that following steps:

1) if part has heat treatment requirements, under woollen state, carries out final heat treatment;

2) with part roughing, the inside and outside circle made allowance is tubular piece;

3) part is evenly cut in half along the axis, the cutting knife width is not more than 2mm;

Two cut-out facing cuts that 4) will cut are flat, and flatness is in 0.15mm;

5) half-finished parts carries out the lonneal processing, eliminates the material internal stress;

6) on grinding plate, grind involutory surface, make the flatness of involutory surface be not more than 0.03mm;

7) with the bonding involutory surface of industrial glue;

8) draw groove with height gauge on the assembly after bonding perpendicular to involutory surface;

9) carry out finish turning behind the assembly clamping, reach final size and precision and incision, with two complete marks of part mark processing in groups, and complete assembling.

Adopt the advantage of said method as follows: 1) solderless scoops out power in the adhesive bonding method process, and part can not produce distortion, has prevented because distortion reduces the problem of element precision; 2) by reasonable clamping, part can not eliminated near the local overproof phenomenon of the size involutory position with respect to the slippage of involutory surface in involutory processing; 3) do not need special fixture in the process, reduce manufacturing cost, eliminated yet and used the position error that anchor clamps produced.Can be widely used in equipment manufacture industries such as machinery, aviation, automobile, method is simple, and is easy to implement.

Description of drawings

Fig. 1 is a semicircle piston clamping point schematic diagram.

Fig. 2 is a semicircle structure of piston dimensional drawing.

Among the figure: 1, part; 2, anchor clamps; 3, involutory surface; 4, the clamping point position line.

The specific embodiment

The involutory processing method of a kind of aluminium alloy seamless is characterized in that following steps:

1. if part has heat treatment requirements, under woollen state, carry out final heat treatment;

2. with part roughing, the inside and outside circle made allowance is tubular piece;

3. part is evenly cut in half along the axis, the cutting knife width is not more than 2mm;

4. two cut-out facing cuts that will cut are flat, and flatness is controlled in the 0.15mm;

5. half-finished parts carries out lonneal, eliminates the material internal stress;

6. on grinding plate, grind involutory surface, make the flatness of involutory surface be not more than 0.03mm;

7. with the bonding involutory surface of industrial glue, if the involutory surface area is less than 7mm ²Can use the J-168 glue bond, if the involutory area of plane is greater than 7mm ², can use 502 glue bonding;

8. draw groove (centering clamping point when being used for finish turning) with height gauge on the assembly after bonding perpendicular to involutory surface;

9. carry out finish turning behind the assembly clamping, reach final size and precision and incision, with two complete marks of part mark processing in groups, and complete assembling.

Be processed as example with semicircle piston shown in Figure 2 below.The primary structure and the size of product are seen Fig. 2, and part material is 2D70, and woollen state is new as-quenched, require finally to be heat-treated to the T6 state.

Concrete procedure of processing is as follows:

1) under woollen state (diameter Ф 120), finally is heat-treated to the T6 state;

2) preliminary working to excircle dimension is Ф 118, and endoporus is machined to size Ф 79, and length is 128mm;

3) part is evenly cut in half along the axis, the cutting knife width is not more than 2mm;

4) mill the truncation section, flatness is controlled in the 0.15mm;

5) the semi-finished product lonneal eliminates stress;

6) abrasive cutting-off face is that the section flatness is not more than 0.03mm, uses 502 glue bond abradant surfaces;

7) mark the clamping position line perpendicular to involutory surface;

8) carrying out finish turning behind the clamping of position shown in Figure 1, guarantee inside and outside circle size and groove size among Fig. 2, add the man-hour speed of mainshaft and be not more than 300 rev/mins, cut off behind the inside and outside circle finish turning, two semicircle piston rings separate automatically;

Two semicircle pistons that 9) will process are together done complete mark, complete use.

Claims (1)

1. involutory processing method of aluminium alloy seamless is characterized in that following steps:

1) if part has heat treatment requirements, under woollen state, carries out final heat treatment;

2) with part roughing, the inside and outside circle made allowance is tubular piece;

3) part is evenly cut in half along the axis, the cutting knife width is not more than 2mm;

Two cut-out facing cuts that 4) will cut are flat, and flatness is in 0.15mm;

5) half-finished parts carries out the lonneal processing, eliminates the material internal stress;

6) on grinding plate, grind involutory surface, make the flatness of involutory surface be not more than 0.03mm;

7) with the bonding involutory surface of industrial glue;

8) draw groove with height gauge on the assembly after bonding perpendicular to involutory surface;

9) carry out finish turning behind the assembly clamping, reach final size and precision after part will separate automatically, semicircular in shape, with two complete marks of part mark of processing in groups, and complete assembling.

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