The device cross-wedge rolling of products of variable cross-section

 

(57) Abstract:

The invention relates to metal forming, manufacturing conal fingers tie rods and ball joints front suspension cars. The device includes movable and stationary wedge tools, the heating element and the control system of the rolling process. To improve accuracy, reduce energy costs, the device is equipped with a charging device for pre-cut blanks, rocking roller for single-piece feed of the workpieces in the area of rolling, with an adjustable stop for fixing the workpiece in the longitudinal direction, the threshold temperature meter blanks in the form of a pyrometric sensor installed in the lead-in part V of the tool and connected to the control system of the rolling process, and a diverter mounted on the rear part of the rolling wedge tool. In this case the heating element is made in the form of inductor currents of high frequency. The elements of the inductor currents of high frequency and adjacent parts of the components can be made of a nonmagnetic material, for example from non-magnetic steel. 1 C.p. f-crystals, 2 Il.

Cross-wedge rolling get different axisymmetric parts with cylindrical, conical, spherical, and other complex surfaces and all sorts of grooves and ridges. The advantage of cross-wedge rolling is that the details obtained in this way, as close as possible to the shape of the final products. In most cases, the final machining is reduced to the separate grinding surfaces.

A device for transverse rolling, containing mounted in the frame for movement toward each other in parallel directions two plates with flat wedge tools, one of which is made detachable, consisting of the front relative to the direction of movement and a rear part, wherein, to increase the accuracy of the Diametric dimensions of the product, one of the plates provided with a wedge pair, installed between the plate and the rear part of the split tool, and a drive movement of one of the wedges, while another wedge in contact with the rear part of the plug instrumentalist 460925 priority from 19.04.73,, authors: G. C., Andreev, E. M. Makushok, B. M. Segal, C. I. Shchukin and C. A. Klushin, the applicant - Physical-technical Institute, Academy of Sciences of the Byelorussian SSR).

The disadvantage of this device cross-wedge rolling of products is a significant deviation of the sizes of the products obtained due to the use of two movable wedge tools inaccuracies of manufacture and required clearances are summarized. The use of wedge pairs in the cross rolling solves the problem of increasing the accuracy of the Diametric dimensions of the product only partially, as is intended, mainly, for sample clearances and does not eliminate the influence of inaccuracies in the manufacture of V-tools.

Also known Stan for cross-wedge rolling, containing installed in two parallel frame plates, V-tools, fixed on the working surfaces of the plates, and heating elements.

The mill is equipped with a device for temperature control and cooling elements, and the heating elements and cooling elements placed in the body of each plate and are connected with a device for temperature control (see SU 617140, 21 N 1/18 priority from February 17, 1977).

The specified technical the fluvial-wedge rolling of products of variable cross-section.

The disadvantage of the prototype is the fact that the workpiece is supplied by the piece in the area of cross-wedge rolling, before the lead-in part stationary wedge tool is not fixed in the longitudinal direction, which might result in the offset of the workpiece from the line of symmetry of the wedge tool. This leads to the fact that in the process of rolling from one side of the line of symmetry is the excess metal, and on the other, the lack of it, resulting in a spherical, conical and cylindrical portions of the product can be ruined or can form an internal cavity that is marriage, and in the part of the rolling mill, where the excess metal, the product will be complete, but to limit waste will leave more metal than usual. In addition, if at the end of rolling is not going to happen remove the finished product from the bottom of the tool, it can be captured in the working area during the reverse course of the rolling wedge tool that may interfere with the rolling process of the next workpiece.

Another disadvantage of the prototype is that induced by the inductor of the high-frequency currents are dispersed in a ferromagnetic metal parts adjacent to the inductor or close located is emeu the present invention, is to improve the accuracy of manufacturing products of variable cross-section, as well as reducing energy costs.

According to the invention the task is solved by improving the design of devices wedge rolling.

The metal rod is cut into billets based on two articles placed in the drive boot device, individually passed through the inductor high frequency currents (currents), then through the swinging of the conveyor serves in an area of rolling. When this material is subjected to zone temperature control to prevent not heated billet in the area of rolling. At the end of the movement of the workpiece it is fixed by adjustable stops, and then the movement of the conveyor to the horizontal position down the workpiece against the wedge tools. While the other end of the tilting roller table is placed in front of the inductor HDTV to receive the next workpiece.

When setting up the device adjustable fence is set so that the middle of the workpiece coincides with the line of symmetry of the wedge tool. A movable wedge tools billet rolled to obtain the desired profile. At the final when the lia on the ends of the profiled parts, then cut two identical products.

The device for implementing the method of cross-wedge rolling of products of variable cross-section contains installed in two parallel frame plates, V-tools, the heating element and the control system of the rolling process, the drive is the boot device for the pre-cut blanks, swinging roller for single-piece feed of the workpiece in an area of rolling, adjustable stops for fixing the workpiece from longitudinal movement, and on the back of the rolling wedge tool installed diverter finished product.

To prevent not heated billet in the area of the rolling device has a threshold temperature meter, made in the form of pyrometric sensor connected with the control system of the rolling process.

In addition, elements of the inductor currents of high frequency and adjacent parts of components made of non-magnetic material, for example from non-magnetic steel.

The invention is illustrated by drawings, where Fig.1 shows a schematic diagram of the device at the site from loading of the workpiece to the rolling, ( Fig. 1 on a common base set drive 1 boot device, mechanism 2 single-piece feed of the blanks with the cylinder 3, the inductor currents of high frequency 4, the swinging roller 5, one end of which is mounted the mechanism 6 return of the heated billet in the inductor 4, the other end an adjustable stop 7 for fixing the workpiece from longitudinal movement, the hydraulic actuator 8 of the tilting conveyor. In the area of lead-in part of the rolling wedge tool set threshold temperature meter 9.

According Fig. 2 on the take-up reel part fixed wedge tool 10 is blank 11 in contact with the initial plot of the rolling wedge tool 12. On each Klinova instrument is fitted with two lateral cutting knife 13 and the Central cutting knife 14 and the rear part of the rolling wedge tool 12 is installed, the diverter 15.

The device operates as follows. Pre-cut blanks 11 are manually loaded into the drive 1 boot device, where they are parallel to each other in one layer, then through the mechanism of the 2 cylinder 3 of the workpiece 11 by the piece served in the inductor 4 HDTV, where during the time spent in the Indus the roller 5 is rotated around its axis, resulting in the end of the roller conveyor 5 with the workpiece 11 rises, the workpiece 11 by the force of gravity is rolled on the rollers until the adjustable stop 7 located at the other end of the roller conveyor 5. This mechanism 6 return, made in the form of a hydraulic cylinder 3 with the rod, is placed in front of the inductor 4 in its axial line and the movement of the rod pushes the next workpiece back into the inductor 4. This is necessary in order to create a guaranteed clearance for the swinging of the roller conveyor 5 when returning it to the horizontal position, in addition, the following billet, returning thus to the inductor 4, maintains the temperature required for normal rolling.

When returning the roller 5 in a horizontal position, the workpiece 11 is the beginning of rolling, while its temperature is controlled by a threshold temperature meter 9 and when the temperature of the workpiece 11 in a predetermined range of the movable wedge tool 12 starts its movement. When the movement of the movable wedge tool 12 relative to the fixed wedge tool 10 and the workpiece 11, making the rotational-translational motion, into the desired shape. The final article is th, the knives 13 are cut off the excess metal of a knife blade 14 cuts the product into two parts.

Feature of the device cross-wedge rolling is that the elements of the inductor HDTV 4 and the adjacent part of the components are made of non-magnetic steel. This is because in the process of inductor 4 HDTV metallic ferromagnetic elements in the zone of distribution of high-frequency currents, are subjected to heat, which leads to additional energy consumption.

The execute method of cross-wedge rolling of products of variable cross-section and use the device for its implementation in accordance with the proposed technical solution allows to ensure the accuracy of the manufacture of products of variable cross-section, increase process reliability and reduce energy costs. In comparison with the known processes of manufacturing fingers tie rods and ball joints front suspension cars, the proposed method and device for its implementation ensure the accuracy of the workpiece with a minimum allowance under mechanical processing.

Thus, in comparison with the prototype managed to mind is inovas rolled products of variable cross-section, containing movable and stationary wedge tools, the heating element and the control system of the rolling process, characterized in that it is provided with a charging device for pre-cut blanks, rocking roller for single-piece feed of the workpieces in the area of rolling, with an adjustable stop for fixing the workpiece in the longitudinal direction, the threshold temperature meter blanks in the form of a pyrometric sensor installed in the lead-in part V of the tool and connected to the control system of the rolling process, and a diverter mounted on the rear part of the rolling wedge tool, in this case the heating element is made in the form of inductor currents of high frequency.

2. The device under item 1, characterized in that the elements of the inductor currents of high frequency and adjacent parts of components made of non-magnetic material, for example from non-magnetic steel.

 

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