SU931805A1 - Apparatus for surface hardening of hollow cylindrical products - Google Patents

Description

one

This invention relates to the chemical-heat treatment of hollow articles, in particular, to installations for high-temperature gas carburizing the inner surface of hollow articles.

A known device for strengthening hollow cylindrical articles, mainly internal surfaces, by gas cementation, containing coaxially mounted supports on racks with locking cones having a longitudinal movement mechanism and coaxial through channels, one of which is connected to a gas supply,

and the other with a tap l. "

A disadvantage of the known installation is the impossibility of providing high-quality processing of the inner surface of the products.

The purpose of the invention is to improve the quality of the treatment of the inner surface of products during gas carburizing.

To achieve this goal, an iB installation for hardening hollow cylindrical articles, mainly internal surfaces, is gas-cemented, containing coaxially mounted on racks, supports with locking cones having a longitudinal movement mechanism and coaxial through channels, one of which is connected to the gas inlet and the other

10 with a tap, a cone is provided with a rotation drive, and a gas supply device with a collector in which the end of the channel is located.

The cone is equipped with water coolers dapaschaya ru15 head with a ring collector.

The plant is equipped with a drive platform placed between the cones with roller bearings fixed on it, a heater and a sprayer.

Claims (3)

Figure 1 shows the device in the initial position, a general view; figure 2 - the same plan; in FIG. 3 a section A-A on (.2. 3 9. The device consists of two racks 1 and 2, equipped with hollow cones 3 and A with mechanisms 5 for their rotation and actuators 6 for translational movement, for example pneumatic cylinders, piping systems 7-9 for supplying gas to the cavity of the pipe through a jack 3, switching device 10 providing automatic gas supply and shutdown, and supplying gas to the collector 11, inductor heating 12 and inductor-thermostat 13 (only one inductor can be installed) with pro-tape roller supports to support heated pipes and an annular spray, rum 15, mounted on a drive platform 16, moving in directions (17) On a drive platform 16, a pump installation 18 is mounted to supply coolant from tank 19 to inductors 12 and 13, 3 cooling also to ring sprayer 15 for cooling the controllable pipe 20. The device is equipped with a setting device 21, for example a rack, a live roll table with a lever mechanism 22 and a receiving device 23, for example a rack, roll table, etc. with the lever mechanism 2. The cones 3 and t are coaxially facing each other on racks 1 and 2 and inside have coaxial channels 25 for supplying gas to the cavity of pipe 20 and its outlet, as well as cooling coils 26. Fluid supply to cooling jacket 2b is provided a stationary pump or a circulating cycle network using a piping system 27 and an annular collector 28. Drives 6 of the translational movement of the cone 3 and | made in the form of pneumatic cylinders with a system of pipelines 29 and 30 of compressed air supply located in the body of racks 1 and 2. i. switching devices (not shown), both with penetrating recess (cone 3 and compressing a pipe. Mechanisms 5 rotating cones 3 and 4 are similar and consist of DC motors and gear systems 31 interacting with the cones 3 and | through the leads 32 and the thrust flanges 33. The cones 3 and 4 are located inside the rods 3 of the pneumatic cylinders of the actuators 6. The device works as follows: 5 A workpiece, for example a pipe 20, is transmitted to the device 21 on the axis of the cones 3 and A and put m of automatic feeding of energy carrier, such as compressed air, through conduit 29 and actuator 6, for example, into pneumatic cylinders, is performed; and relative sealing of pipe ends 20 moving with cones 3 moving towards each other and then lever mechanism 22 returns to its initial position and, at the same time, the supply of the working gas to the internal cavity of the pipe 20 is automatically switched on via the piping system 7 and 9 with the switching device 10, the collector 11 and the channel 25 in the cone 3. After filling the cavity of the pipe 20, The gas 5 automatically turns on the mechanisms of rotation 5 of the cones 3 and (with their cooling system, as well as the movement actuator 16 with inductors 12 and 13 and the pump unit 18 for supplying water for cooling the inductors and into the ring sprayer 15, resulting in a continuous-continuous process heating the pipe 20 with its subsequent cooling. At the end of heating the pipe 20 (OG.2), the drive of the movement of the platform 16, inductors 12 and 13, the mechanisms 5 of rotation of the cones 3 automatically disconnects and the device 10 also switches to supplying inert gas to purge the pipe 20 through pipes 8 and 9 11 and channel 25 in the cone 3. After the purging of the pipe 20 with an inert gas, the transfer-lever mechanism 2k is automatically switched on and the compressed air is switched through the pipeline 30 to the actuator 6, for example, into pneumatic cylinders, as a result Um decompression of the ends of the pipe 20 and transfer it to the receiving device 23 ,. for example on stellac, rodgang etc. After the transfer of the pipe 20 to the receiving device 23, the lever mechanism 2 automatically returns to its original position and simultaneously drives the movement of the platform 16 to reverse, to return to its original position. When the platform 16 reaches its initial position (FIG. 1), its displacement drive, the pumping ycTafiosKy 18 and the supply of liquid to the cooling jackets 26 of the cones 3 and automatically turn off. At this point, the working cycle of processing the product at the installation ends. All of the technology (and the processing of the product (pipe) inside the working cycle is performed automatically when electromechanical interlocks are allowed. Claims 1. An installation for strengthening the floors of a cylindrical product, mainly internal surfaces, by gas carburizing, contained (and coaxially fixed on the supports) with the cones fixing them, having a mechanism of longitudinal movement and coaxial through channels, one of which is connected to the gas supply and the other to the outlet, in order to increase machining-operation, rotation of the drive cone are provided, and the device for conveying gas - a collector, which is the channel end. 2. The installation of pop. 1, differs from the fact that, in order to increase the resistance of the cone, it is equipped with a very cool jacket with a ring collector. 3. The installation according to claim 1, that is, in order to eliminate the deflection of long products during processing, it is equipped with a drive platform placed between the cones with roller supports fixed on it, a heater and a sprayer. Sources of information taken into account in the examination 1. USSR author's certificate IN 283269 ,. cl. From 21 D to 9/08, 1970. J / Have go tz g f (f f ,, „11, f ff ff fffffffffffff ff ffff fffffj K, BL:: X XNSSNSS 2ZSZZ222ZZ aEZ fiB« Z2ZZ2222 22