CROSS-WEDGE ROLLING MACHINE SPF

Basic delivery set:
1. Cross-wedge rolling machine
2. Mechanism for feeding billets into the machine
3. Mechanism for unloading the billets, rejected by the temperature.
4. Mechanism for unloading the inductor
5. Feed hopper
6. Operating platform with a ladder.
7. Loading tray
8. Mechanism for feeding billets into the inductor
9. Induction heater cabinet
10. Inductor
11. Pyrometer
12. Mechanism for unloading the wedge machine
13. Frequency converter
14. Hydraulic actuator
15. Pneumatic actuator
16. Electric equipment cabinet
17. Electric power equipment cabinet
18. Control board of the cross-wedge rolling machine
19. Adjusting control board
20. Cooling system
21. Desk for wedge die mounting
22. Wedge dies set
23. Conveyor for transporting preforms to the press
24. Conveyor for unloading butt-ends
25. Conveyor for billets rejected by the temperature
26. Scales
27. Reducer
28. Transmitter of the rotation angleа

Delivery set includes:
Operations manual
Wedge die drawings
Inductor drawings
Set of spare parts

NEW LINE OF CROSS-WEDGE ROLLING MACHINES SPF

The machines of the SPF line are developed to produce preforms for further forging.

The preforms produced on SPF wedge rolling machines acquire properties that are important for forging:
1. Optimum shape
2. Required weight

By optimum shape of the preform received by cross-wedge rolling for further forging we mean the preform of round section that have longitudinal profile, in which distribution of the material along the axis of the round preform is in direct proportion to distribution of the material along the axis of the part after forging. During forging process of such preform, the filling of the forging mold is realized evenly along the perimeter, the material is drifting along the shortest path. When using the preforms of the optimum shape for forging, this process is accomplished with minimal fin or without it. Meanwhile the minimum energy is spent and the lifetime of the forging die increases. On picture 1 there is an example of the optimum shape preform for forging of the part “connecting rod”. The longitudinal profile of the preform of round section is calculated in such way that on each length segment the sectional area of the round preform is equal to the sectional area of the forged item.

Required weight. Forging of preforms in the required weight interval allows to reduce the quantity of the material in fin to minimum, and makes it possible to forge preforms without fin.

Cross-wedge rolling machines of the SPF line are working in following way.
The cylindrical billets are loaded in bulk into the feed hopper 5. From the feed hopper 5 the billets are automatically loaded at the required speed into the inductor 10, where they are being heated. The temperature is controlled by the pyrometer 11. From the inductor 10 the billets are loaded into the cross-wedge rolling machine 1 for rolling. The billets rejected by the temperature are directed into separate container. After rolling the manipulator carries the billet onto the scales 26. The information about the weight of the billet is transferred into controller, which is mounted in the electric equipment cabinet 16. The controller takes one of the following decisions depending on the weight of the billet:

1. To direct the billet to the press for forging.
2. To direct the billet to the press for forging and to regulate the diametral dimensions of the billet. The regulation is carried out by the reducer 27. The regulation degree is controlled by the transmitter of the rotation angle 28.
3. To direct the billet into container for the billets rejected by weight and to regulate the diametral dimensions of the billet

Operation 1 is performed when the weight of the billet is within the regulation inhibit range G (picture 2).
Operation 2 is performed when the weight of the billet is within the permissible weight range P, but out of the regulation inhibit range G (picture 2).
Operation 3 is performed when the weight of the billet is out of the permissible weight range P (picture 2).

The permissible weight range P and the regulation inhibit range G can be promptly specified during the operating cycle of the cross-wedge rolling machine.

Technological operating cycle of the cross-wedge rolling machines of the SPF line can be represented in the following way:

ROLLING – SCALING – DIAMETER REGULATING – ROLLING

Cross-wedge rolling machines of the SPF line are constructed in such way that it becomes possible to regulate the diametral dimensions of the billets with the resolution 0,02…0,05 mm. The regulation can be carried out within the time period, when the wedge dies are moving into home position, that is why it is not necessary to stop the machine to make the regulations. The accuracy of regulation allows to reach the weight accuracy of the billets for forging in the range of 1,5%.