TWM651015U - Pressurized automatic welding mechanism - Google Patents

Abstract

A pressurized automatic electric welding mechanism, including: a multi-axis mechanical arm, a hydraulic cylinder, and an electric welding device; the hydraulic cylinder is installed on a jig of the multi-axis mechanical arm; the electric welding device is installed on the Outside the hydraulic cylinder, an electrode of the electric welding device is connected to a movable member that performs linear reciprocating motion in the hydraulic cylinder; the multi-axis robot arm controls the electrode to correspond to a joint angle, which is composed of two welding female parts. It is composed of a horizontal welding surface and a vertical welding surface intersecting; it is characterized in that: the multi-axis robot arm controls the angle between the electrode and the horizontal welding surface to be 45 degrees, and the hydraulic cylinder controls the electrode pair The molten slag in the joint angle performs forward linear motion to load a pressure, thereby improving the quality of the weld and improving the yield rate of the welding UT inspection (ultrasonic inspection method).

Description

Pressurized automatic welding mechanism

This creation relates to the field of electric welding. More specifically, it is an automated electric welding mechanism controlled by a robotic arm, and the mechanism includes welding electrode pressure.

Electroslag welding (ESW) is a welding process similar to resistance welding, and is often used for the connection of large steel welds or thick plates of steel structures. During the welding process, electrodes are used to apply pressure to the assembled weldments, and current is used to weld through the resistance heat produced by the joint contact surface and adjacent areas of the weldments. Welding current, welding pressure, and welding (discharge) time are the three important parameters of resistance welding. What is being discussed in this case is welding pressure.

The most commonly used electrode pressurization method is driven by a cylinder. But one of the disadvantages is that the air intake and exhaust need to be carefully evaluated and controlled. The throttling and buffering devices must be carefully arranged to achieve pressurization and buffering to avoid large impacts. The second disadvantage is that as the fusion of the solder joints changes during the welding process, the electrode pressure is difficult to adjust quickly, and the follow-up performance of the cylinder is not good, which affects the welding quality.

In order to solve the above problems, this invention proposes a technology that uses oil pressure to control electrode pressure.

Technical features of this creation: A pressurized automatic electric welding mechanism, including: a multi-axis mechanical arm, a hydraulic cylinder, and an electric welding device; the hydraulic cylinder is installed on a jig of the multi-axis mechanical arm; the electric welding device is installed on the oil Outside the pressure cylinder, an electrode of the electric welding device is connected to a movable part that performs linear reciprocating motion in the hydraulic cylinder; the multi-axis robot arm controls the electrode to correspond to a joint angle, which is composed of two welding mother parts It is composed of the intersection of a horizontal welding surface and a vertical welding surface; it is characterized in that: the multi-axis robot arm controls the angle between the electrode and the horizontal welding surface to be 45 degrees; the electrode strikes an arc and heat-melts the welding mother piece Molten slag is generated to fill the joint angle, and the movable member of the hydraulic cylinder controls the electrode to perform a forward linear movement of the slag to load a pressure.

The purpose of this creation is that the angle between the electrode and the horizontal and vertical welding surfaces is 45 degrees, and the hydraulic cylinder controls the electrode to apply stable and accurate contact pressure to the welding surface and slag, so that the welding surface and adjacent The heating temperatures of the areas (heat-affected zone, overheated zone and fusion zone) are equal, and the penetration of the welding surface is uniform, so as to reduce the occurrence of insufficient melting amplitude, partial melting and insufficient penetration of the weld seam (the joint part formed after welding the weldment) , poor fusion, internal cracks, pores, insufficient fusion filling and other defects to improve the quality of welds and improve the yield rate of welding UT inspection (ultrasonic inspection method).

The linear motion stroke fed by the hydraulic cylinder can accurately control the pressure loaded on the electrode.

This creation is suitable for right-angle angle joints, T-shaped joints, lap joints, and cross joints, and is suitable for flat welding, horizontal welding, vertical welding, and overhead welding.

10:Multi-axis robotic arm

11:Jig

20:Hydraulic cylinder

21: Movable parts

30:Welding device

31:Electrode

40:joint angle

41: Welding mother parts

42:Welding mother parts

43: Horizontal welding surface

44:Vertical welding surface

θ: included angle

[Figure 1] Schematic diagram of the pressurized automatic welding mechanism of this invention.

[Figure 2] One of the schematic diagrams of the electrode and joint angle of this creation.

[Figure 3] The second schematic diagram of the electrode and joint angle of this creation.

[Figure 4] The third schematic diagram of the electrode and joint angle of this creation.

[Figure 5] Schematic diagram of the pressure welding surface of the electrode of this invention.

In order to facilitate the explanation of the central idea expressed in the above novel content column of this invention, specific embodiments are hereby expressed. Various objects in the embodiments are drawn according to proportions, sizes, deformations or displacements suitable for illustration, rather than according to the proportions of actual components, and are explained first. In the following description, identical and symmetrically arranged components are represented by the same numbers.

As shown in Figure 1, the pressurized automatic electric welding mechanism of the present invention includes: a multi-axis robotic arm 10, a hydraulic cylinder 20, and an electric welding device 30.

The hydraulic cylinder 20 is installed on a fixture 11 of the multi-axis robotic arm 10 . The electric welding device 30 is installed outside the hydraulic cylinder 20 . An electrode 31 of the electric welding device 30 is connected to a movable member 21 that performs linear reciprocating motion in the hydraulic cylinder 20 . The electric welding device 30 may further include a continuous solder conveying device (not shown), which continuously provides solder to the weld bead during the welding process according to the welding needs. The electrode 31 may be a consumable electrode or a non-consumable electrode.

As shown in Figure 2, the multi-axis robot arm 10 controls the electrode 31 to correspond to a joint angle 40 (weld bead). The joint angle 40 (weld bead) is composed of a horizontal welding surface 43 and a horizontal welding surface 43 of two welding mother parts 41, 42. A vertical welding surface 44 is formed by intersecting at right angles. The multi-axis robot arm 10 controls the angle θ between the electrode 31 and the horizontal welding surface 43 to be 45°.

The joint angle 40 may be composed of two welded female parts 41 and 42 angled as shown in FIG. 2 . Or as shown in Figure 3, it is composed of two welded female parts 41 and 42T-shaped joints. Or as shown in Figure 4, two welded female parts 41,42 Made up of overlapping joints.

The multi-axis robot arm 10 further controls the electrode 31 to perform welding along the extension length of the joint angle 40 (welding bead). The hydraulic cylinder 20 controls the electrode 31 to perform forward linear motion relative to the joint angle 40, so that the electrode 31 is close to the joint angle 40 (weld bead), thereby igniting an arc to heat-melt the joint angle 40 (weld bead). ) on both sides of the welding parent parts 41, 42 and/or solder to form slag filling in the joint angle 40 (weld bead).

As shown in Figure 5, during the welding process, the hydraulic cylinder 20 controls the electrode 31 to perform forward linear motion of the welding surface and slag to load a pressure. The pressure is preset according to the welding pressure requirement, such as 5 pounds, 10 pounds, 30 pounds...etc.

The hydraulic cylinder 20 controls the reverse return stroke of the electrode 31 to unload the pressure, or move the electrode 31 away from the welding seam at the end of the welding.

10:Multi-axis robotic arm

11:Jig

20:Hydraulic cylinder

21: Movable parts

30:Welding device

31:Electrode

Claims (1)

A pressurized automatic electric welding mechanism, including: a multi-axis mechanical arm, a hydraulic cylinder, and an electric welding device; the hydraulic cylinder is installed on a jig of the multi-axis mechanical arm; the electric welding device is installed on the Outside the hydraulic cylinder, an electrode of the electric welding device is connected to a movable member that performs linear reciprocating motion in the hydraulic cylinder; the multi-axis robot arm controls the electrode to correspond to a joint angle, which is composed of two welding female parts. It is composed of a horizontal welding surface and a vertical welding surface intersecting each other; it is characterized in that: the multi-axis robot arm controls the angle between the electrode and the horizontal welding surface to be 45°; the electrode strikes an arc to heat-melt the welding mother The piece generates molten slag to fill the joint angle, and the movable piece of the hydraulic cylinder controls the electrode to perform a forward linear motion of feeding the molten slag to load a pressure.

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