SU700253A1 - Automatic line for drop stamping - Google Patents

Description

one

The invention relates to the processing of metals by pressure, in particular to automatic lines for hot stamping.

A known automatic hot stamping line comprising a vehicle-connected rack for receiving, dividing and feeding bars, a device for dividing bars into dimensional blanks, a tumbling drum, a heating device with an inductor, a device for hot stamping, and a device for removing burrs.

A disadvantage of the known automatic line is the impossibility of producing precise hot forgings on it, for example, gears, due to the oxidation and decarburization of the stamping surface after the deformation operation, as well as the considerable labor intensity of forgings.

The purpose of the invention is to improve the accuracy of the products obtained and to reduce the labor-intensive production.

The goal is achieved by the fact that the automatic line is equipped with a device for the staged cooling of hot

stampings located between the hot stamping device and the deburring device and made in the form of a bath with liquid with successively inclined transport mechanisms installed in it, the upper part of which is located above the liquid level, and automatic liquid temperature regulators located in the bath. The drawing shows a diagram of an automatic line for hot stamping.

A rack 1 with a conveyor for supplying steel bars is located in front of the device 2 for cutting rods into dimensional workpieces, which are connected by a conveyor 3 with a tumbling drum 4. Behind the latter is an inclined conveyor 5 with a bunker storage unit for supplying blanks to an HD 6 heating device with inductor .m 7 equipped with gas nozzles 8. The inductor 7 is connected by a chute 9 to a device 10 for hot stamping, equipped with glass-textatite buffers 11. A device for step-cooled cooling is installed in the line. Punching, consisting of a bath 12 with a liquid.

for example, with water, and inclined conveyors 13 located therein, heat heaters 14, temperature control sensors 15. The line ends with a deburring device 16.

Automatic line works as follows.

A stack of steel bars is loaded onto rack 1, from which one bar is separated. The rollgang of the rack 1 feeds a bar into the device 2 for cutting to the dimensional blanks. The device 2 is equipped with an electric stop (not shown), which gives the command to the press actuator To perform the cutting operation. The clamping clamp before cutting is carried out with a wedge clamp (not shown), which allows to obtain a high-quality and accurate cut. A cutting die (not shown) is mounted on a mechanical press with a cushion. The device 2 also has a mechanism for rejecting non-dimensional blanks (not shown). Dimensional workpieces by the conveyor 3 are fed to the tumbling drum 4, which serves as an intermediate tank and, having hammered and burrs, prepares the workpieces for passing through the heating and other devices. Then the blanks are fed into the bunker of the inclined conveyor 5, which feeds them to the HDTV b heating device into the inductor 7. When the blanks are heated, the inductor 7 is fed with inert gas, which prevents air from penetrating and oxidizing the surface of the heated blanks. The nozzles 8 used for guiding inert gas can be replaced with burners for burning natural or other combustible gas. The combustion products of gases also prevent the oxidation of the surface of the heated billet. The heating device 6 is equipped with a safety device for automatic removal of underheated blanks (not shown) both at the beginning of heating the blanks, and in the case of lowering the mains voltage or shutting down the installation. In addition, there is a safety device in case of a mechanical obstacle to the advancement of the workpieces in the inductor 7. Next, the heated workpieces along the inclined chute 9 enter the feeding mechanism (not shown) of the device 10 for hot stamping. During punching, glass-textolite buffers 11 clamp the separable matrices with a force exceeding the calculated opening force, and at the same time can serve as a safety device against overload due to excess

metal. The stamped billet is removed by a removal mechanism (not shown) into the water bath 12 of the cooling device, where the stamping rapidly cools to a temperature that exceeds the quenching temperature and then is removed from the water by an inclined conveyor 13. After exposure to air, the temperature equalizes in volume and lowering the overall temperature of the product below the quenching product, it is again immersed in water and again taken to the air by a second inclined conveyor. To reduce the cooling rate, reduce internal stresses and prevent the formation of cracks, the water in the device is heated by thermal electric heaters 14.

The temperature of the water and the prevention of its boiling are controlled by sensors 15, which, when the water is heated by heating elements and hot billets, turn on the cold water supply and turn off the heating elements. The cooled stampings are transferred to the deburring device 16.

Automatic line eliminates manual machining operations, example of gear milling in the manufacture of sprockets or half-sprockets of chain gears, facilitates labor in forging, reduces injuries, improves the accuracy and dimensional stability of stamped products.

Claims (1)

Invention Formula Automatic line for hot stamping containing vehicle-connected rack for receiving, separating and feeding rods, a device for dividing rods into dimensional workpieces, a tumbling drum, a heating device with an inductor, a device for hot stamping and a device for removing burrs, characterized in that, in order to increase the accuracy of the products obtained and reduce their labor intensity production, it is equipped with a device for staged cooling of hot forgings, located between the device for hot punching and a deburring device made in the form of a liquid bath with inclined transport mechanisms installed in series, the upper part of which is located above the liquid level, and automatic liquid temperature controllers located in the bath.