CN201613420U - A double-sided friction stir spot welding device - Google Patents

Abstract

A double-sided friction stir spot welding device is composed of a support, a workbench, a sliding platform, and a welding part. The cylinder is connected with the sliding table, and the cross arm protrudes from the sliding table. The welding part includes the upper stirring head, the lower stirring head, the upper shaft shoulder and the lower shaft shoulder; the upper stirring head is supported on the cross arm through the bearing, and the upper shaft shoulder is set on the On the upper stirring head, the upper shaft shoulder is supported on the cross arm through bearings, and the motor on the cross arm drives the upper shaft shoulder and the upper stirring head through a gear pair; the lower stirring head is supported on the workbench through bearings, and the lower shaft shoulder is placed on the lower stirring head. On the head, the lower shaft shoulder is supported on the worktable through bearings, and the lower shaft shoulder and the lower stirring head are driven by the gear pair under the workbench. The functions of the upper and lower shoulders are: one is to prevent the overflow of plastic metal; the other is to generate heat by friction with the surface of the workpiece to be welded, and compensate part of the heat. Therefore, the utility model can avoid the defects of deep pits in solder joints and many extrusions.

Description

A double-sided friction stir spot welding device

technical field

The utility model relates to a device for double-sided friction stir spot welding.

Background technique

Friction stir welding is a new method of material solid phase connection proposed by The Welding Institute (TWI) in 1991. At the same time, many friction stir welding equipment have been developed. These equipments are mainly welding parts to control a stirring head to be loaded on the workpiece to be welded with a certain pressure, and to move forward at a certain speed along the direction of the weld while rotating, so the loading pressure, the rotation speed and the moving speed of the stirring head ( That is, welding speed) are the main process parameters of friction stir welding. With the further development of friction stir welding technology research, on the basis of this technology, the friction stir welding spot welding technology (Friction Stir Spot Welding, referred to as FSSW) is proposed. The difference between friction stir spot welding technology and friction stir welding technology is that friction stir spot welding does not move along the longitudinal direction of the weld, and there is no inclination (welding direction) of the stirring head during the spot welding process. Therefore, the friction stir spot welding equipment can realize the high-speed rotation of the stirring head while loading the workpiece to be welded. After the workpiece is welded by the existing friction stir spot welding equipment, there are defects such as deep pits in the solder joints and many extrusions.

Contents of the invention

In order to solve the defects of deep spot pits and many extrusions in the current friction stir spot welding equipment, the utility model proposes a double-sided friction stir spot welding device.

For this reason, the technical scheme of the utility model is: a double-sided friction stir spot welding device, which is composed of a support, a workbench, a sliding platform, and a welding part. It is vertically guided on the guide rail, and the cylinder is fixed on the support to connect with the slide table. The cross arm extends from the slide table. It is characterized in that: the welding part includes the upper stirring head, the lower stirring head, the upper shaft shoulder, and the lower shaft shoulder; The stirring head is supported on the cross arm through the bearing, the upper shaft shoulder is set on the upper stirring head, the upper shaft shoulder is supported on the cross arm through the bearing, the motor is fixed on the cross arm, and the motor drives the upper shaft shoulder and the upper stirring head through the gear pair ;The lower stirring head is supported on the working table by the bearing, the lower shaft shoulder is set on the lower stirring head, the lower shaft shoulder is supported on the working table by the bearing, the motor is fixed under the working table, and the motor drives the lower shaft shoulder and the lower shaft through the gear pair. stirring head.

In addition to exerting pressure on the workpiece to be welded, the upper and lower stirring heads are also required to achieve high-speed rotation and friction with the surface of the workpiece to generate heat to provide the heat and force required for welding, so that the joints form a firm connection under the action of frictional heat. The upper and lower shaft shoulders are designed around the upper and lower stirring heads, which can exert certain pressure and high-speed rotation on the workpiece to be welded during welding. The main functions are: first, to prevent plastic metal from overflowing; Friction generates heat that compensates for some of the heat needed to achieve a high-quality weld. Therefore, the utility model can avoid the defects of deep pits in solder joints and many extrusions.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

Detailed ways

As shown in Figure 1, a device for double-sided friction stir spot welding consists of a support 1, a workbench 10, a sliding table 3, a thrust bearing 4, a bearing 5, a motor 8 and a gear pair 9, and the welding part includes Upper stirring head 6, lower stirring head 12 and upper shaft shoulder 7, lower shaft shoulder 11. The upper stirring head 6 is supported on the cross arm through the thrust bearing 4 and the bearing 5, the upper shaft shoulder 7 is set on the upper stirring head 6, the upper shaft shoulder 7 is supported on the cross arm through the bearing, and the motor 8 is fixed on the cross arm. 8 Drive the upper shoulder 7 and the upper stirring head 6 through the gear pair 9; the lower stirring head 12 is supported on the worktable 10 through bearings, the lower shoulder 11 is set on the lower stirring head 12, and the lower shoulder 11 is supported on the worktable through bearings 10, the workbench 10 is fixed with a motor, and the motor drives the lower shaft shoulder and the lower stirring head through the gear pair.

The upper and lower shoulders are designed around the stirring head and can be rotated in a plane and moved vertically; a certain pressure can be applied to the workpiece to be welded during welding. The pressure applied by the upper and lower stirring heads to the weldment (for welding) ranges from 1470 to 5880N; the value of the pressure exerted by the upper and lower shoulders on the weldment (for heat generation and prevention of plastic metal overflow) can be slightly smaller , the range can be set as 1000 ~ 5000N; Since the upper and lower spot welding is carried out at the same time during double-sided friction stir spot welding, and the loading force is relatively large, the coaxiality of the upper and lower stirring heads is required to be good during welding.

Claims (1)

1. A double-sided friction stir spot welding device is composed of a support, a worktable, a slide table and a welding part. The workbench is located at the lower end of the support, and the slide table is vertically guided on the guide rail of the support. The cylinder is fixed to connect with the slide table, and the cross arm protrudes from the slide table. It is characterized in that: the welding part includes the upper stirring head, the lower stirring head, the upper shaft shoulder, and the lower shaft shoulder; the upper stirring head is supported on the cross arm through bearings , the upper shaft shoulder is set on the upper mixing head, the upper shaft shoulder is supported on the cross arm through the bearing, the motor is fixed on the cross arm, and the motor drives the upper shaft shoulder and the upper stirring head through the gear pair; the lower stirring head is supported by the bearing in the working On the table, the lower shaft shoulder is sleeved on the lower mixing head, and the lower shaft shoulder is supported on the worktable through bearings. A motor is fixed under the worktable, and the motor drives the lower shaft shoulder and the lower mixing head through a gear pair.

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