SU1255652A1 - Line for annealing articles - Google Patents

Description

The invention relates to heat treatment of parts, in particular, to a line for annealing parts of pipeline valves.

The purpose of the invention is to improve the quality of annealing parts.

FIG. Figure 1 shows schematically a line for annealing parts; in fig. 2 is a section A-A in FIG. I; in fig. 3 shows a section B-B in FIG. one; in fig. 4 - device alignment of the side walls of the container, the plan.

The line for annealing parts contains sequentially installed parts loading device 1, annealing furnace 2 and parts discharging device 3. Between devices 1 and 3 for loading and unloading parts, a device 4 for leveling side corrugated walls 5 of heat-resistant steel of container 6 is installed. Containers 6 are mounted on conveyor 7, which connects devices 1 and 3 of loading and unloading parts 8 and annealing furnace 2. The device 4 of leveling is made in the form of horizontal hydraulic cylinders 9 with punches 10, the working surface 11 of which is adequate to the corrugated surface of the side walls 5 of the container 6. The side walls 5 are attached to the pallet 12 of the container

The line for annealing parts works in the following way.

. At the loading position, using the device 1, the parts 8 are loaded (for example, casting levers) into the container 6, which moves the container 7 through the annealing furnace 2 to the device 3 unloading parts 8. After the parts are unloaded, the heated container 6 moves to the zone of the side straightening device 4 the container walls before contact with the terminal terminal by the reader (not shown), which is triggered and instructs the hydraulic cylinders 9 to compress in two mutually perpendicular directions using the punch 10 of the side walls 5 of the container 6 to the nominal s sizes. After this, the operation cycle of the lines continues as described above.

The proposed line provides

reduction of deformations of parts and increases the durability of the container up to 750-800 h or up to 40 cycles, while the known line has a service life

up to 200-230 h or up to 10 cycles

The introduced improvement in the line provides not only obtaining the estimated rigidity of the container stand, but also the metered load

parts into the container due to the restoration of the shape and size of the container walls with a straightening device after each cycle of the container operation in the annealing furnace. Recovery form

corrugation of the walls allows them to easily increase the volume of the container due to deflection by the action of the spacer force while increasing the dimensions of the parts during heating

corrugated The surface of the parts does not experience large contact stresses from the forces arising from the jamming of parts in the container in the annealing furnace. Jamming effect

parts arises in the furnace because the parts lying completely in the container, under the influence of the heating temperature increase their size by the appropriate amount, depending on the coefficient of temperature expansion of the material parts

Details during heating can move freely in the presence of free space - gaps between them

in the container, and taking into account that the parts in the container are loose, in contact between the side surfaces, in the process of heating they form wedged among themselves and

container walls. chains. At the same time, the resulting large contact voltages change the shape and dimensions of the parts.

The invention solves this problem by ensuring the flexibility of the container shifts, which, by changing their shape and size, reduce the contact stresses on the surface of the parts to values that are not vyggeyu-.

changes in their shape and size that ensures quality parts, as well as increases the service life of containers.

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Order 4788/30 Circulation 552Subscription

VNISHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. design, 4

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Claims (1)

ITEMS ANNEALING LINE, containing sequentially installed part loading device, annealing furnace, unloading device connected by a conveyor with containers with a pallet and thin-walled corrugated side walls and a pallet return line, characterized in that, in order to improve the quality of annealing of parts, it equipped with a device for straightening the side walls of the container mounted on the return line of pallets between the devices for unloading and loading parts and made in the form of horizontally arranged female hydraulic cylinders with punches, the working surface of which is adequate to the surface of the side walls of the container. - 2 ¹ 4 s fig 1 SL SL 05 SP No.