CN207577235U - A kind of high strength alumin ium alloy spinning pipe and core model heating unit - Google Patents

Abstract

The utility model discloses a high-strength aluminum alloy spinning tube blank and mandrel heating device belonging to the technical field of aluminum alloy tube material processing, comprising: a mandrel, a discharge ring, bolts, a tube blank, a heat insulation layer, an induction heating coil, etc. part. The heat insulation layer separates the tube blank and the induction heating coil, so that there is no electrical connection between the two, so there is no danger of leakage; the heat insulation layer also keeps the tube blank and the core mold warm to reduce heat loss. The induction heating coil is an inductor that uses induction heating and is surrounded by a hollow copper tube. The induction heating coil heats the tube blank and the mandrel. High, heats up fast. The utility model adopts the induction coil to heat the spinning tube blank and the mandrel, has high heating efficiency, improves the temperature uniformity of the spinning tube blank, and significantly improves the spinability of the material; solves the problem of high-strength aluminum alloy material spinning forming , Improve the finished product rate and production efficiency.

Description

A high-strength aluminum alloy spinning tube blank and mandrel heating device

technical field

The utility model belongs to the technical field of processing and forming of difficult-to-deform materials, in particular to a high-strength aluminum alloy spinning tube blank and a mandrel heating device.

Background technique

Pure aluminum has low density and excellent plasticity, but its strength is not high. As an aerospace application, the choice of low-density materials is an important way to increase payload, and aluminum is a good choice. However, the improvement of its strength requires alloying. After decades of research and accumulation, the ultra-hard high-strength aluminum alloy series of Al-Zn-Mg-Cu series has been maturely applied to the aviation field. The strong spinning of pipes (strong spinning) has the advantages of flexibility, material saving, and the ability to form large-diameter-thick-ratio pipes. It is an effective method for processing high-precision, high-performance large-diameter pipes. Strong spinning is a complex forming process under the coupling of multiple factors. Local loading causes non-uniform deformation of the material, which requires high machinability of the material. However, the plasticity and toughness of high-strength aluminum alloy materials are low, and their machinability is poor. It is difficult to spin at room temperature. Generally, hot spinning is required. Traditional hot spinning mainly uses acetylene flame heating, and the outer surface of the tube blank is directly heated by the flame. The temperature difference between the inner surface in contact with the mandrel is large, and the heating of the tube blank in the thickness direction is very uneven, which leads to a significant increase in the degree of uneven deformation during the spinning process, and the very complex non-uniform deformation significantly reduces the forming ability of the material. High-strength aluminum Alloy materials are very easy to crack during spinning, resulting in spinning failure, and the spinning of high-strength aluminum alloy material pipes is quite difficult.

Therefore, the uneven spinning temperature of high-strength aluminum alloy tube billet and core mold temperature has become the main problem in solving high-strength aluminum alloy material spinning.

Utility model content

Aiming at the problems raised in the background technology, the utility model proposes a high-strength aluminum alloy spinning tube blank and mandrel heating device, which is characterized in that it includes: mandrel, unloading ring, bolts, tube blank, heat insulation layer and Induction heating coil; the unloading ring is integrally fixed by the inner ring body and the outer fixed ring, and there are not less than one pair of threaded through holes radially penetrating the unloading ring on the outer fixed ring; the unloading ring is installed on the The bolts on the threaded through holes are fixed on the mandrel; the heat insulation layer is made of high temperature resistant asbestos and is composed of the left side and the right side; the left side of the heat insulation layer is paved outside the discharge ring; The right compartment of the heat insulation layer is paved in the induction heating coil; the tube blank is placed in the right compartment of the heat insulation layer.

Preferably, the mandrel is a hollow or solid mandrel made of hot work die steel.

The induction heating coil is an inductor that adopts an induction heating method and is surrounded by a hollow copper tube.

The beneficial effects of the utility model are: adopting the induction heating coil to heat the spinning tube blank and the mandrel, the tube blank and the mandrel can be heated quickly, reducing the temperature difference between the inner and outer surfaces of the spinning tube blank, and improving the temperature of the spinning tube. The uniformity of billet temperature slows down the uneven deformation in the spinning process, improves the forming ability of the material, suppresses or reduces spinning cracking, and significantly improves the spinability of high-strength aluminum alloy materials; solves the problem of high-strength aluminum alloy materials The problem of spinning forming is improved, and the yield and production efficiency are improved.

Description of drawings

The accompanying drawing is a structural schematic diagram of an embodiment of a high-strength aluminum alloy spinning tube blank and mandrel heating device of the present invention;

In the figure: 1. Mandrel; 2. Unloading ring; 3. Bolt; 4. Tube blank; 5. Heat insulation layer; 6. Induction heating coil.

Detailed ways

In order to further illustrate a high-strength aluminum alloy spinning tube blank and mandrel heating device, the utility model will be described in detail in conjunction with the accompanying drawings.

As shown in the accompanying drawings, the high-strength aluminum alloy spinning tube blank and core mold heating device includes: core mold 1, discharge ring 2, bolt 3, tube blank 4, heat insulation layer 5 and induction heating coil 6;

Mandrel 1 is a hollow or solid mandrel, and the material of mandrel 1 is hot work die steel such as 3Cr2W8V or GH13;

The unloading ring 2 is integrally fixed by the inner ring body and the outer fixed ring, wherein the outer fixed ring is provided with no less than a pair of threaded through holes radially penetrating the unloading ring 2; the unloading ring 2 is installed on its The bolt 3 on the threaded through hole is fixed on the mandrel 1;

The heat insulation layer 5 is high temperature resistant asbestos, and is composed of a left side interlayer and a right side interlayer; the left side interlayer of the heat insulation layer 5 is paved outside the unloading ring 2; In the right compartment;

The induction heating coil 6 is an inductor that adopts an induction heating method and is surrounded by a hollow copper tube;

When preparing for work, first set the unloading ring 2 on the mandrel 1, and then use the bolt 3 to fix the relative position of the unloading ring 2 and the mandrel 1 to prevent the relative rotation of the unloading ring 2 and the mandrel 1; The left interlayer of the heat insulation layer 5 is paved outside the unloading ring 2, and the induction heating coil 6 and the right interlayer of the heat insulation layer 5 are installed outside the tube blank 4 together;

After the preparation is completed, the tube blank 4 and the induction heating coil 6 are separated by the right partition of the heat insulation layer 5, so the induction heating coil 6 is not electrically connected to the tube blank 4 and the mandrel 1, so there is no leakage The danger of high temperature resistant asbestos also plays a role of heat insulation, and heats the tube blank 4 and the mandrel 1 to reduce heat loss; at the same time, the left compartment of the heat insulation layer 5 also connects the induction heating coil 6 to the left side of the mandrel 1 The head of the mandrel is separated to prevent the heat from spreading to the head of the mandrel 1 and causing damage to the spinning machine.

When working, the induction heating coil 6 heats the tube blank 4 and the mandrel 1, and the tube blank 4 and the mandrel 1 heat up rapidly by themselves under the action of the alternating current, and then the tube blank 4 is heated by the unloading ring 2 and the mandrel 1. Spinning operation; fast heating and high power conversion efficiency.

Claims (3)

1. a kind of high strength alumin ium alloy spinning pipe and core model heating unit, which is characterized in that including：Core model (1), discharge ring (2), Bolt (3), pipe (4), thermal insulation layer (5) and load coil (6)；Wherein discharge ring (2) is by inner ring body and external stability Ring is integrally affixed to be formed, and the tapped through hole that no less than a pair extends radially through discharge ring (2) is provided on external stability ring；Discharge ring (2) it is fixed on core model (1) by the bolt (3) being installed on its tapped through hole；Thermal insulation layer (5) is for high temperature resistant asbestos and by a left side Side interlayer and right side interlayer composition；The left side interlayer of wherein thermal insulation layer (5) is mated formation in discharge ring (2) outside；The right side of thermal insulation layer (5) Interlayer is mated formation in load coil (6)；Pipe (4) is in the right side interlayer of thermal insulation layer (5).

2. a kind of high strength alumin ium alloy spinning pipe according to claim 1 and core model heating unit, which is characterized in that described Core model (1) be by hollow or solid core model of the hot die steel as material.

3. a kind of high strength alumin ium alloy spinning pipe according to claim 1 and core model heating unit, which is characterized in that described Load coil (6) is around the inductor formed using induction heating mode and by hollow copper tubing.