SU974608A1 - Inductor for heating blanks moving inside it - Google Patents

Description

(54) INDUCTOR FOR HEATING MOVED INSIDE ITUALS

one

The invention relates to induction heating and can be used in the technique of end heating for further pressure treatment in a heated state, as well as in heat treatment technology.

Known devices induction heating blanks in the slot inductors, providing uniform heating of the bucket part C.

The main drawback of devices is that when CTenetib is crimped, the deformations along the length in different sections are not hard and uniform heating of the parts leads to a decrease in the resistance of the strain, which leads to the appearance of defects on the corrugations, ovality, an increase in the volume of machining after the crimping operation. In addition, uniform heating of the end to the maximum process temperature leads to increased consumption of electrical energy, reduced productivity and efficiency of the heating process.

The closest to the one proposed is t (ductor for heating movable

inside it there are blanks containing a frame attached to the frame, the turns of which are installed with a variable gap from each other, increasing to the discharge end of the inductor, a heat insulating layer on the working surface of the turns and a magnetic conductor covering the winding 2.

However, this switch provides maximally alpugo. power at the start of the shaductors, i.e. accelerated heating of the billets, but does not provide D) 1 heat removal along the length of the ends of the billets along a certain plot of the distribution of body-to-ture from the end to the final heating zone, i.e. high-quality heating kondov blanks.

The goal of Ji3o6peTeiniH is to improve the quality of heating the blanks in a slotted 1 inductor by providing differentiated heating of the ends of the blanks.

Claims (2)

This goal is achieved by the fact that in the inductor DUTKH the windings are installed along the axis for removing the workpieces, and the variable gap is formed by arranging the coils with a tilt angle from the upper end. 397 Figure 1 shows an end heating device; figure 2 is the same cross section; on FZ, the temperature distribution diagram. The device contains a mechanism for transporting parts with simultaneous rotation of parts 1, a slit inductor 2 having a variable width of active sides due to uneven clearance between the turns during the movement of parts. The target inductor on each turn has threaded studs 3 with which through a slat 4 a slit inductor. 2 is fastened to the frame 5. The frame for rigidity is assembled on the straps 6, by means of the bar 7 to the frame 5 the magnetic conductor 8 is attached. The frame 5 is mounted on the mechanism 9, by which the heating length of the part 10 is adjusted. heat-resistant concrete lining 11. The device works as follows. The parts to be heated are fed to the mechanism for transporting the workpieces while simultaneously rotating the part around the axis. The transport mechanism brings the parts into the slot inductor, as the part progresses, they begin to heat differentially. The installed magnetic core limits more sharply the heating zone of the end of the billet; in addition, it prevents the elements of the structure bordering the slotted inductor from heating. Installed linings made of crushed stone or heat-resistant concrete limits heat loss to the environment. Details moving through a slotted inductor, which has a variable width of the active sides due to an uneven gap between the rods, varying from the minimum at the beginning of the inductor to the maximum in the course not exceeding the width of the active part of the coil (not to significantly heat the intensity) heat exchange with temperature distribution over the length of the heated part according to a predetermined diagram in the specified limits. If the ends of different lengths are heated in one inductor, the slit inductor is raised or lowered using a mechanism. The power supply of the autotransformer needs to change the voltage on the inductor so that the number of blanks heated per hour remains approximately the same. Tests of the proposed end differential heating device have shown that its durability during operation compared to known devices increases, eliminates rejection of ovality, corrugations, points are filled up due to differential heating of the deformable part in different sections, reduces mechanical labor intensity, saves electricity for heating the end part by reducing temperatures in low-deforming sections, increases the performance of heating parts for crimping 1.5 times . Claims of the invention: Inductor for heating the workpieces being moved inside it, containing a winding attached to the frame, the rolls of which are installed with a variable clearance each other, increasing to the discharge end, the insulating layer on the working surface of the turns and the magnetic core covering the winding, characterized in that, in order to improve the quality of heating the ends of the blanks in the slot inductor, the turns of the windings are set along the axis of movement of the blanks, and the variable gap is formed by the arrangement of the windings kov with an inclination concerning the top turn. The total amount of information taken into account during the examination 1.Slukhotsky A.E. et al. P1 inducers for induction heating. 1974, p. 252. 2. In the same place 222-223.