SU1270021A1 - Device for pressing butt joint - Google Patents

Abstract

The invention relates to the tire industry, in particular to both sides for crimping the joint of the tector. The aim of the invention is to improve the strength of the joint due to the possibility of ensuring that the welding head fits to the curved joint. For this purpose, the magnetostrictive transducers and the welding head are made in the form of a package of identical thickness plates installed perpendicular to the working surface of the STI heads with the possibility of RELATIVE movement of the ultrasonic oscillations supplied from the generator overlap the plates. Each works independently of the others, processing the part of the tread underneath its working surface. One of the two matching plates is covered with an antifriction dielectric material, which is about (L facilitates the movement of the plates relative to each other. 1% 3 ill.

Description

This invention relates to the tire industry, in particular to equipment for crimping the junction of the protector. The purpose of the invention is to increase the strength of the joint due to the possibility of ensuring the fit of the welding head to the curved joint, FIG. 1 shows the proposed device, a general view; in fig. 2 is the same cross section; in fig. Fig. 3 shows the interaction of the welding head with the processed joint of the protector. The device contains 1 set of acoustic elements mounted in the form of magnetostrictive transducers 2 with excitation winding 3 and welding head 4, and pneumatic pressure transmitter 5. Magnetic stresses. in the form of a package of the same thickness gshastin 6 and 7, installed perpendicular to the working surface of the head 4 with the possibility of relative displacement, the welding head 4 is mounted on frame 8, and excitation winding 3 is mounted on frame 9, which is not mechanically connected to the magnetostriction transducers 2. One of the two mating surfaces of plate 6 is coated with antifriction-free dielectric material, for example, fluoroplastic fg-4-, which facilitates movement of acoustic transducers one relative to another. In addition, this layer provides electrical insulation of the plates of the magnetostriction package relative to each other, thereby reducing the detrimental effect of Foucault currents. A set of plates 6 and 7 provides a reduction in the thickness of the entire acoustic element in order to more accurately repeat the working end of the ultrasonic head. relief. The thickness is selected depending on the minimum radius of the height difference and can be less than 1 mm. Each acoustic element occupies an individual place on the surface being processed independently of the others and repeats the profile being processed in order to uniformly heat it along the entire length. The device .work. As follows. On the support of the assembly drum, the joint of the tread 10 is placed, combined with the set of plates 7 and air is fed into the pneumatic chamber 5 under the pressure P. Last, it tends to expand under the action of the pressure P, interacts with the frames 8 and through the plates 7 eventually presses on the machined joint of the tread 10, since the excitation winding 3 is superimposed on the frame 9, it does not interfere with the axial movement of the plates 7 together with the frames 8 and the magnet-rimmed formers 2, therefore each element has the ability to occupy all The exterior is an individual place, regardless of the rest of the elements, and together they quite EXACTLY repeat the relief of the treated surface. A welding pressure is generated that is evenly distributed throughout the length of the tread joint. At this moment electric ultrasonic oscillations from a generator (not shown) are applied to the field winding 3. Each element works independently of the others, processing the portion of the tread underneath its working surface. After crimping is finished, the pressure P is relieved, the joint is released, the device is returned to its original position. Formula 1 of the invention 1. A device for crimping a joint, comprising a set of acoustic elements mounted on the base, in the form of magnetostrictive transducers with an excitation winding and a welding head and an oppressive pneumatic chamber, characterized in that, in order to increase the strength of the joint, due to the possibility of providing a welding unit heads to the curvilinear joint, magnetostrictive transducers and welding head are completed in the form of a package of the same: in the thickness of the plates installed perpendicular to Static preparation head surface with possibility of relative movement. 2, apparatus according to i, characterized in that one of the two mating surfaces of the plates is coated with an antifriction dielectric material.

. J

K t

Claims (2)

Claim 1. The device of the day crimping the joint, containing mounted on the basis of a set of acoustic elements in the form of magnetostrictive transducers with an excitation winding and a welding head and crimping pneumatic chamber, characterized in that, in order to increase the strength of the joint due to the possibility of ensuring the fit of the welding head to the curved joint, magnetostrictive converters and the welding head are made in the form of a package of the same: according to the thickness of the plates mounted perpendicular to the working surface of the heads with the possibility of relative movement. 2. The device according to claim 1, characterized in that one of the two mating surfaces of the plates is coated with antifriction dielectric material.