JPS6045020B2 - Roll rotary forging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a newly developed apparatus for use in rotary forging of rolls.

The present inventors have developed a new roll manufacturing method with the aim of improving the material of the roll and improving its productivity and economy.

To explain this method simply, in this method, a cast roll material is pressed into a predetermined shape by rotary forging while forming a plastic working layer on the outer shell. The performance of the outer shell is significantly improved, and productivity and economy are significantly improved compared to conventional methods of cutting and forming a roll from a cast material, or cutting and forming a cast material after press forming. .
Therefore, the present invention provides an effective rotary forging device for manufacturing rolls by carrying out this rotary forging, and its features include rotatably supporting both ends of the roll, It also consists of a support member that is driven and rotated, and a rotary forging member that has a cooling section inside, such as a disc-shaped roller, and the support member and the rotary forging member can be moved and adjusted relative to each other in position or angle if necessary. The point is that it can be set freely.

Hereinafter, specific embodiments of the present invention will be illustrated and described.

In Figures 1 to 3, 1 is a roll that undergoes rotary forging, and the roll that approximates the predetermined roll shape, that is, the portion that undergoes rotary forging has a large diameter and is made small in the axial direction. It is something. 2 and 3 are support members for the roll 1; 2 is a chuck part that supports one end of the roll 1 and rotates the roll 1 by being driven and rotated by a rotation driver (not shown);
are a plurality of support rollers that extendably support the other end of the roll 1.

Reference numeral 4 denotes a rotary forging member, which is pressed against the outer circumferential surface of the rotating roll 1 to plastically deform the roll 1 and forge it into a predetermined external shape. Use parts, etc.

In terms of practical functionality, it is preferable to use a reversing roller. In any case, when the roll 1 is rotary forged, its outer shell is heated to a hot temperature at which plastic processing is possible, for example, 840 to 1200°C, and therefore the rotary forged member 4 is continuously used. Therefore, it is necessary to have a cooling part such as a water flow hole inside, and it is desirable that the material has excellent wear resistance. An example of such a rotary forging member 4 is shown in FIGS. 4 and 5, and the one in FIG. 4 is pressed at an inclined angle by the roll 1 during rotary forging, and is rotated in the axial direction. It is used to forge the outer circumferential surface of the roll 1 over a wide range by moving sequentially, and is composed of a reversing roller 6 having a cooling section 5 inside and a peripheral edge formed in an arc shape or a straight shape. The one shown in FIG. 5 is pressed perpendicularly to the roll 1 and is advanced in the axial and radial direction to locally press-form the roll 1, and is used for manufacturing caliper rolls. In this case, forming auxiliary rollers 7 for suppressing the protrusion of the edge of the caliper groove are provided integrally or separately on both sides of the free rotating roller 6 corresponding to the desired caliper groove shape.
Such a rotary forging member 4 is attached to a movable base 8 located at the front. This movable table 8 is mounted on a rotary table 8a which can be slid left and right on a base 9, and a sliding table 8b which can be slid back and forth.
Further, a left and right sliding table 8c is provided on the top thereof, and the rotary forging member (4) is freely rotatably provided on a holder 8d provided on this table 8c. Therefore, the rotary forging member 4 can be moved and adjusted in angle with respect to the roll 1 if necessary by operating the movable base 8. Reference numeral 10 in the figure is a receiving roller that abuts and supports the roll 1 from the opposite side of the roll 1 against which the rotary forging member 4 is pressed.
A case will be described in which rotary forging is performed on the roll 1 using the apparatus having the above configuration. For example, when a flat body roll is forged by rotary forging, the rotary forging member 4 shown in FIG. 4 may be used. That is, roll 1
is rotated between the chuck part 2 and the support roller 3, and presses the rotary forging member 4 on its outer peripheral surface at an appropriate inclination angle,
Roll 1 is rolled down locally. By moving this rotary forging member 4 along the axial direction of the roll 1, the entire surface of the body of the roll 1 can be uniformly reduced in diameter. By repeating this operation, since the shape of the roll 1 has been selected in advance as described above, the shape of the roll 1 can be changed to . Can be molded into a predetermined shape.
In this case, the roll 1 expands in the axial direction as the diameter is reduced by rotary forging, but this does not cause any problem because one end is supported so that it can expand. In addition to the case where it is applied to the entire surface of the body, it can also be applied to a part of the body, or the entire outer peripheral surface of the roll 1 including the shaft can be rotary stitched. Next, we will discuss the case where the caliper roll is formed by forging by rotary forging.In this case as well, it is sufficient to use the rotary forging member 4 as shown in FIG. By pressing and sequentially advancing in the radial direction of the shaft, a caliper groove of the desired shape and depth can be formed by forging.

The rotary forging of the roll 1 as described above can be easily accomplished by freely operating the rotary forging member 4 by operating the movable table 8.

Here, the heating temperature of the roll 1 when rotary forging is performed on the roll 1 will be explained.

Since the outer shell of the roll 1 is subjected to plastic working by rotary forging, at least the outer shell of the roll 1 subjected to the rotary forging is set to a plastic working temperature that facilitates the plastic working. On the other hand, during rotary forging, if the rigidity of the roll 1 itself is insufficient, it may bend and deform, making rotary forging difficult. Therefore, during rotary forging of the roll 1, the outer shell is heated to a hot temperature that allows plastic processing, while the inside is kept at a relatively low temperature that maintains its rigidity.Therefore, the roll 1 is heated by surface heating means. The internal temperature is low and the outer shell is high temperature. For example, in the case of cast iron or adamite, the inside temperature is set at around 600°C, and the outer shell part is set at around 100'C. However, in general, rotary forging is performed at a uniform temperature (for example, 840 to 1100°C) both inside and outside. In order to heat the roll 1 in this way,
In the apparatus of the above embodiment, a separate heating furnace for heating the roll 1 can be arranged so that the roll 1 can be relatively moved in and out, or a surface rapid heating device such as a burner can be placed in an appropriate place. It is good to place it.

In the roll 1 on which the predetermined shape or desired caliper grooves are formed by forging by such rotary forging, the outer shell structure on which the rotary forging has been performed is made into a plastically worked structure.

That is, the outer shell structure of the roll 1 is made into a flat, fine, fibrous crystalline structure continuous in the axial direction by approximately the same size as the thickness dimension reduced by the rotary forging, and casting defects and deflections are also crushed. homogenized. In addition, in the case of adamite and casting rolls, precipitates and crystallized substances such as cementite and graphite are uniformly dispersed in the base. In addition, in the caliper groove formed by the above-mentioned rotary forging, the crystalline structure around the groove becomes a flat fine fibrous structure that continues along the caliper groove. As described above, there are various effects of improving the roll material by rotary forging, and the performance of the roll 1 is thereby significantly improved. As described above, rotary forging allows the roll 1 to be formed into a predetermined shape by forging, and has the effect of significantly improving the performance of the roll in its outer shell, making it an innovative method for manufacturing the roll 1. .

The apparatus of the remaining embodiments is a completely new apparatus for carrying out this rotary forging on the roll 1, and the roll 1 is driven and rotated by a roll support member consisting of a chuck part 2 and a support roller 3. A rotary forging member 4, which supports and has a cooling part 5 inside idler rollers 6, 6'', etc., is attached to a movable base,
Because the roll supporting member, that is, the roll 1, can be moved and adjusted in its front, rear, right, left, and right positions and angles, it has become possible to provide, for the first time, a device that can carry out smooth rotary forging. In the above embodiment, the rotary forging member 4 was attached to the movable base 8 for operation, but the structure of the movable base 8 is not limited to that described above. It is sufficient if the position and angle can be freely adjusted.

Further, in the above embodiment, the rotary forging member 4 is operated with respect to the roll 1 at a fixed position, but conversely, the rotary forging member 4 is fixed and the rotation from the roll 1, that is, the chuck part 2 and the support roller 3 is performed. It is also possible to make the supporting members relatively movable and adjustable.

Furthermore, the support roller 3 may be replaced by a member that supports one end of the roll 1 in an extensible manner, such as a bearing that supports the roll 1 slidably in the axial direction.

As explained in detail above, the device of the present invention can be effectively used as a newly developed device for rotary forging of rolls, and this device can improve the effectiveness of rotary forging of rolls. is realized. Although the present invention has been described with respect to rolls, it can be similarly applied to roller shafts of rolls.

[Brief explanation of drawings]

FIG. 1 is an explanatory plan view showing one embodiment of the present invention, FIG. 2 is an explanatory side view of the same, FIG. 3 is an explanatory front view of the same, and FIG.
FIG. 5 is a sectional view illustrating each rotary forging member. 1...Roll, 2...Chuck part, 3
... Support roller, 4 ... Rotating forging member, 8 ... Movable base.

Claims (1)

[Claims] 1 Consists of a support member that rotatably supports both ends of the roll and drives and rotates it, and a rotary forging member that is equipped with a cooling section inside, such as a disc-shaped roller, and the support member and the rotary forging member are relative to each other. A rotary forging device for a roll, which is characterized in that its position can be freely adjusted.