Installation for the manufacture of taps

 

(57) Abstract:

The invention relates to the processing of metals by pressure and can be used in the manufacture of elbows from billets. The inventive unit is supplied through the input camera with injectors and end lined chamber, an open end portion and provided with an additional heating burners, which are located on the border of the forming and sizing section of the cores. Partitions between the sections of the chambers are made of a composite of the two ring half flanges, between which the flange of the T-shaped cross section and an insulating gasket. Each section is made in the form of a cylindrical body placed in it the working chamber with coaxially arranged cylinders with radial nozzle holes. Wall of the cylindrical working chambers installed on the T-shaped flange with the possibility of axial movement, and wall coaxially arranged in the working chamber of the cylinder is located on the ring half flanges with clearance relative to the annular flange of the T-shaped form. This embodiment of the heating device in the installation reduces SS="ptx2">

The invention relates to metal forming, and more particularly to the production of pipe bends from billets.

The known device for making pipe bends, containing mounted on the frame bar with horn-cores, the feed mechanism billets in horn-cores and multi-turn inductor for heating billets, self-centering carriage with the attached rollers, the carriage, the transformer and the inductor are rigidly interconnected and are biased against the frame [1]

This device, intended for the manufacture of pipe bends using the heating, bending, has the disadvantage inherent in the facilities using induction heating of billets, namely, high energy costs, increasing the cost of production.

This drawback is devoid of a device in which the heating of the billets is performed using a gas mixture.

Known heating device contains a reservoir of the feed gas mixture and the heating device in the form accommodated in the housing of the working chamber with coaxial RA is

The above setup allows to reach the optimal temperature regime along the length of the package blanks and reduce energy costs. However, the known device does not provide a stable temperature field under cyclic recharges, due to the presence of only one common working chamber and the absence of inlet and outlet chambers, preventing heat loss. When recharging installation inevitable heat losses and, as a result, the need to adjust the temperature field along the length of the installation during the transition from work mode to boot. Furthermore, the design of the known installation provides input to the heating device, the gap between the guide sleeve and the rod and tube blanks through the leakage of thermal energy.

The task of the invention consists in the creation of energy-efficient installation that supports optimal mode, as during the stroke, and at the time of recharge.

The technical result from the use of the invention involves the reduction of energy losses by 20% by maintaining the technologically optimal temperature field in the cells during pullback billets and when the installation for the manufacture of taps, containing the broaching mechanism, the collector feed gas mixture and the heating device in the form accommodated in the housing of the working chamber with a coaxially located therein a cylinder with uniformly distributed on the walls of the radial spellname holes, supplied with an input chamber in which at an angle to the longitudinal axis of the installed injectors, and end lined chamber with gas burners and a window in the front-end part, and the heating device is made of sections with dividing partitions between them in the form of a ring of half flanges, between which the annular flange of the T-th cross-section shape and an insulating strip, while the walls of the working chamber mounted on the annular flanges of the T-th cross-section shape for axial longitudinal movement, and the middle wall of partition installed on the ring half flanges with clearance relative to the annular flange of the T-shaped in cross-section of the form.

In Fig. 1 shows an installation, General view; Fig. 2 section a-a in Fig. 1; Fig. 3 the heating device, a longitudinal section; Fig. 4 - view of B in Fig. 3; Fig. 5 node 1 in Fig. 3.

Installation for the manufacture of taps includes long press 1 with horn-the best of adjacent identical units, each of which contains a cylindrical chamber 5 and sequentially placed concentric spaced annular chambers 6 and 7. Wall 8 of the Central cylindrical working chamber 5 and the average wall 9 of the cameras 6 and 7 have a system sopilnyk holes 10, which are evenly spaced along the length of the sections 3 to feed gas mixture from the manifold 11 and create along the length of the horn-core 2 pipe blanks 12 three temperature zones. Section 3 separated by a partition in the form of two ring half flanges 13, between which there is a flange 14 having a cross-section of T-shape, and an insulating gasket 15, which is located at the junction of the collapsible hull 16. The connection node body not shown. This may be accomplished, for example, in the form of bolted connections and welded to the housing lugs (not shown). Wall 8 is installed on the annular flange 14 of the T-shaped in cross section form with the possibility of axial movement relative to him and to each other, and the walls 9 on the half flanges 13 with a gap 17 relative to the annular flange 14. At the entrance interconnected sections 3 of the heating device is placed in the input chamber 18. At the exit of the sections 3 of the heating device Razi and open at the bottom to release the finished bends 21. Lined Luggage 19 gas burners 22, which are mounted on the sides of the chamber 19 at the junction of the shaping section 23 in calibrating section 24. The entrance chamber 18 have the injectors 25, mounted at an angle to the longitudinal axis of feed of the workpieces 12.

Setup works as follows.

Before pulling elbows 21, horn-core 2 put on him tubular workpieces 12 are placed through the end window 20 end lined chamber 19, section 3 of the heating device and fix twang in the press 1. Heating of the forming tool, which is horn-core 2, and a tubular billet 12 is done by creating in the working chamber 5 is required for pulling of the temperature field. For this gas mixture supplied through the manifold 11, ignited burners 22, which is pilot-pilot burners. Then the gas mixture is fed into the chambers 6 and 7 of the first temperature zone, and from it to the second and third zone corresponding to the sections 3 of the heating device. Adjusting the flow of the gas mixture along the length of the sections 3 in the Central working chamber 5, create the required temperature p is s on the outer horn core 2 at a constant speed, occurs in the Central working chamber 5, and the final lined chamber 19, with simultaneous operation of all nozzles. Working injectors 25 at this point prevents the exit of combustion products of the gas-air mixture through the gaps at the input of the blanks 12 in the chamber 18, creating an air layer. After stopping the feed of the first batch of workpieces 12 installation stop to return the broaching press 1 to its original position, and loading a new batch of workpieces 12. At this point, with the aim of saving fuel intensity of heating is reduced. There is a malfunction of the temperature regime along the entire length of the heating device. The greatest heat loss usually occurs in open lined chamber 19. Therefore, the gas burner 22 is not completely off, which reduces heat loss. The site boundary forming and calibrating sites selected in such a way that provides for a duty cycle of the required temperature in all the zones, and when recharging allows by periodic off nozzles in sections 3 and respectively in the annular chambers 6 and 7 to avoid overheating of certain areas of the workpieces 12 and, as a result of the subsequent marriage. Periodic off agrevation areas of the chambers 6 and 7 of 3 different sections, their walls 8,9 are moved relative to each other and relative to the housing 16. The walls 8 are moved relative to each other along the circular flange 14 T-shaped, and the walls 9 in the presence of the gap 17 is moved relative to the housing 16, the walls 8 and relative to each other by half flanges 13. Insulating gasket 15 ensures the tightness of the chambers 5,6,7 in relation to the environment and is also used to reduce heat loss. End box 20 refractory-lined chamber 19 facilitates the recharging of the installation and at the same time avoids overheating processed products of combustion of the receiving conveyor (not shown) and facilitates recovery.

The use of the invention allows to maintain the temperature field along the length of the installation both during transport and during Stripping and unexpected installations.

Installation for the manufacture of taps, containing the loading mechanism billets, the mechanism of longitudinal pulling of the workpieces on the horn-core and the heating device, characterized in that it is equipped with an input chamber in which at an angle to its longitudinal axis installed the injectors, limit lined camera with about the ideal collector feed gas mixture and successive heating sections with dividing partitions in the form of a ring of half flanges, between which is placed an annular flange with a T-shaped cross section and an insulating gasket, and each section is made in the form of a cylindrical body placed in it the working chamber with coaxial spaced relation to the cylinder, having distributed on their radial walls nozzle holes, and the walls of the working chambers are mounted on the annular flange with a T-shaped cross section with the possibility of longitudinal movement, and wall coaxially arranged in the working chamber of the cylinder is installed on the ring half flanges with clearance relative to the annular flange of the T-shaped cross-section.

 

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