A Welding Fixture Design with Freely Adjustable Welding Angle
With the rapid development of welding equipment, the demand for welding auxiliary equipment is also increasing. However, due to the various shapes and types of welded parts, welding fixtures are usually designed for a certain type of product, so
There are also many types of welding fixtures, and these special welding fixtures are difficult to use when welding other products.
The author found that in the process of welding and forming of many parts, it is necessary to weld two parts to be welded together at a certain angle, and the angle between the two parts to be welded varies greatly among different parts, so it cannot always be based on The same angle is welded construction. Therefore, during construction, people often make temporary fixtures to assist clamping, or simply manually position them. It is difficult to ensure the accuracy of the angle between the two welded parts in welding construction in this way. The auxiliary fixtures are often not universal and can only adapt to specific angles. The clamping, when the angle of the welded part is changed, the fixture has to be changed. How to provide a method that can not only accurately position and reliably clamp the weldment at a certain angle, but also change the angle of the clamp when the welding angle changes, so as to facilitate the assembly and welding of the weldment, thereby improving welding efficiency , to ensure welding accuracy. For this reason, this paper attempts to design a welding fixture that can freely adjust the welding angle, and after many demonstrations and modifications, the design scheme is finally established.
Structural design of welding fixture with free adjustable welding angle
The fixture designed in this paper is a device that can accurately position and reliably clamp the weldment at a certain angle, facilitate the assembly and welding of the weldment, and ensure the structural accuracy of the weldment. The structural diagram of the welding fixture is shown in Figure 1, and the schematic diagram of the fixture structure is shown in Figure 2. The composition and working principle of the welding fixture are as follows: the large knob 13 is connected with the screw 5 as a whole; the screw cover 6 and the connecting rod 4, the connecting rod 4 and the left support arm 2, the connecting rod 4 and the right support arm The support arm 2, the base 1 and the right support arm 3 are connected by pins and can rotate with each other; Rotate; the internal thread of leading screw cover 6 forms threaded connection with the external thread of leading screw 5, drives leading screw 5 to rotate by rotating big knob 13, because the external thread of leading screw 5 rotates with respect to the internal thread of leading screw cover 6 so that The lead screw sleeve 6 moves along the axial direction of the lead screw 5, thereby driving the movement of the connecting rod 4 and the rotation of the left support arm 2 and the right support arm 3 to form a linkage mechanism, that is, by controlling the rotation of the large knob 13 and then controlling the left support The angle between the arm 2 and the right support arm 3, and the threaded connection of the screw 5 and the screw sleeve 6 can realize the self-locking of the angle between the left support arm 2 and the right support arm 3, preventing the left support arm 2 and the right support arm from being caused by external force. The included angle of the right support arm 3 changes.
The left support arm 2 and the right support arm 3 are left-right symmetric, and this paper only conducts further analysis on the right support arm. As shown in Figure 1 and Figure 2, the fixture is fixed on the right support arm 3 by screws, the fixture clip 10, the fixture support 8, the fixture screw 9, the small knob 12 and the right support arm 3 form a small Fixture, small knob 12 is connected as a whole with fixture screw 9, and the threaded hole on the support plate 11 of fixture screw 9 and fixture support 8 is threaded connection, and the clamp screw 9 and fixture support 8 The threaded hole on the support plate can only be rotated relatively, and the clamp clip 10 is connected with the clamp support 8 to form a moving pair. By rotating the small knob 12, the clamp clip 10 is controlled to move along the axial direction of the clamp lead screw 9, thereby Make the jig clip 10 and the right support arm 3 clamp the weldment. The clamp clip 10 and the base plate 14 of the clamp support 8 form a simple linear guide rail through the cooperation of the guide rail groove 16, so as to increase the stability and strength of the clamp. When welding the two weldments at a certain angle, they can be respectively fixed on the fixtures on the left and right sides, and then the angle between the left support arm 2 and the right support arm 3 can be adjusted to the required value by rotating the large knob l3. Angle and then welding operation.
