CN104816080A - Heating device of welding zone - Google Patents

Abstract

The invention relates to a processing device, in particular to a welding area heating device. The deformation caused by welding is mainly caused by the input of welding heat and the asymmetry of welding heat input. At present, the main way to reduce welding deformation in the profession is to reduce the input of welding heat, such as laser welding, high-energy electron beam welding, friction stir welding, etc. The above welding methods rely on special welding equipment. For the commonly used welding method of manual argon tungsten arc welding, the welding heat input depends on the thickness of the weldment. The effect of controlling welding deformation by reducing the welding heat input is not obvious. It can start with reducing the asymmetry of welding heat input. The heating device for the welding area of the present invention is an integrated structural part and is easy to use; when welding the weld seam position, the temperature of the weld seam of the product rises and falls at the same time, which effectively reduces the welding temperature difference and significantly reduces thermal deformation.

Description

A welding zone heating device

technical field

The invention relates to a processing device, in particular to a welding area heating device.

Background technique

The deformation caused by welding is mainly caused by the input of welding heat and the asymmetry of welding heat input. At present, the main way to reduce welding deformation in the profession is to reduce the input of welding heat, such as laser welding, high-energy electron beam welding, friction stir welding, etc. The above welding methods rely on special welding equipment. For the commonly used welding method of manual argon tungsten arc welding, the welding heat input depends on the thickness of the weldment. The effect of controlling welding deformation by reducing the welding heat input is not obvious. It can start with reducing the asymmetry of welding heat input.

The main nozzle of the engine of a certain type of engine is circularly welded by turning parts and sheet metal parts. Symmetrical segmental welding is mainly used to control welding deformation. Segmental welding is to minimize stress deformation caused by welding shrinkage. , There is still a temperature difference of more than 1000°C between the welding area and the non-welding area. The thermal deformation after welding is relatively large, and the products are generally out of tolerance after welding. Relying on manual correction after welding, and milling the positions that cannot be installed, the installation is ensured by reducing the size of the product.

Contents of the invention

The object of the present invention is to provide a device for overall heating of the welding area. The technical solution of the present invention is a welding area heating device, comprising: a mounting frame, an insulator, and a thermal resistor; the thermal resistor is installed inside an insulator that is insulated and resistant to high temperature; The heating device heats the welding area on the surface of the mounting frame and keeps it within the range of 600°C to 700°C.

The effect of the invention is that the heating device in the welding area is an integrated structural part, which is convenient to use; when welding the welding seam position, the temperature of the welding seam of the product rises and falls at the same time, which effectively reduces the welding temperature difference and significantly reduces thermal deformation.

Description of drawings

Fig. 1 is the welding mode schematic diagram of the present invention;

Fig. 2 is a sectional view of the heating device of the present invention;

Figure 3 is a schematic diagram of welding products.

1. Mounting frame 2. Insulator 3. Thermal resistance 4. Welding parts 5. Welding parts

Detailed ways

As shown in FIG. 1 , the thermal resistor 3 is embedded in the installation frame 1 by means of an insulated and high-temperature-resistant insulator 2 , and heats the welding seam position where the welded part 4 and the welded part 5 meet.

This device is installed on the fixture for product welding. It continuously heats the unwelded seam before welding. During the welding process, the welded seam, molten pool, heat-affected zone, and unwelded seam are continuously heated to seal the weld seam. After all is completed, continue heating for a period of time to relieve stress, and then cool down the product slowly.

Figure 3 is an example of the heating welding of the main nozzle of a certain type of engine: the mounting edge of the main nozzle is a turning part, the wall of the main nozzle is a sheet metal part, and the weld seam is heated and then butt welded.

Claims (1)

1. a welding region heating apparatus, is characterized in that, comprising: installing rack (1), insulator (2) and thermal resistance (3); The insulator (2) that thermal resistance (3) is arranged on insulation high-temperature-resistant is inner; Insulator (2) is embedded in the upper surface of installing rack (1); Heated by the welding region of described heating apparatus to installing rack surface during welding, remain on 600 DEG C within the scope of 700 DEG C.