Electric heating – Metal heating – By arc
Patent
1994-03-24
1995-10-17
Paschall, Mark H.
Electric heating
Metal heating
By arc
21912126, 21912117, 2191212, B23K 1500, B23K 1508
Patent
active
054592976
DESCRIPTION:
BRIEF SUMMARY
RELATED APPLICATIONS
This application is related to the following two applications, both being filed simultaneously herewith: Wolfgang Boppel et al application entitled "METHOD AND APPARATUS FOR MANUFACTURING TEXTURE DRUMS", U.S. Ser. No. 08/050,962, International Application No. PCT/DE91/00785; and Wolfgang Boppel et al application entitled "METHOD AND APPARATUS FOR MANUFACTURING TEXTURE DRUMS", U.S. Ser. No. 08/030,459, International Application No. PCT/DE91/00786.
BACKGROUND OF THE INVENTION
The invention is directed to a method for manufacturing a texture drum, whereby a surface structure is produced in the surface region of the texture drum with an electron beam. The invention is also directed to an apparatus for the implementation of the method.
In the past, various methods have been employed for manufacturing such texture rollers or skin-pass rollers that, in particular, are employed for producing a surface structure in the region of sheet steel. On the one hand, particle charging with steel pellets corresponding to a scrap metal shot occurred. Second depressions were implemented in the surface region of the texture drum with the assistance of electro-erosion or with the assistance of lasers. The electro-erosion and the particle charging with steel pellets, however, lead to depressions limited with sharp edges whose edge regions tend to break off and, thus tend to develop dust. Over and above this, an oxidation of the drum metal and, thus, a formation of ash arise in electro-erosion and in laser charging. The number of depressions to be produced on the drum surface when carrying out a processing with lasers is limited by the inertia of the mirrors employed.
German Published Application 28 40 702 discloses a method and an apparatus for improving the quality of fine sheet steel. It is recited in this publication that a surface structure on the drum surface occurs with the assistance of an intermittent energy beam along a helical path. In particular, it is recited that a laser beam can be employed as an energy beam. However, it is also already pointed out that an electron beam can be fundamentally employed. Specific teachings directed to the execution of a method upon employment of an electron beam or for building an apparatus that employs this method are not, however, provided.
EP-A-0 119 182 discloses that a drum surface is charged with the assistance of a laser beam or an electron beam. A helical path in the region of the drum is produced with the assistance of this radiation. In particular, it has been envisioned here to blow a gas, for example oxygen, into the region of the beam charging. An oxidation of the drum metal occurs in the region of the beam charging due to the presence of oxygen. The formation of a crater wall that surrounds a recess generated by the radiation is thereby largely avoided since the material evaporating from or hurled from the recess in a liquid state reacts very quickly with the oxygen.
French Patent 902 850 discloses that a surface structuring be implemented in the region of a texture drum with the assistance of laser emission and that the employment of mirrors is to be avoided since the texture drum to be charged is rotationally and translationally moved past a stationary laser.
The texture drums manufactured with the known method do not allow any satisfactory useful lives since an intensification of the pressing power during operation is required due to a relatively quickly decreasing roughness of the drum surface. This higher pressing power, however, leads to other sheet metal properties, particularly to changes of the hardness and in the bending properties. Since these changes occur during production, constant product properties cannot be guaranteed.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to improve a method of the type initially cited such that a surface structure that withstands high loads is produced.
With respect to the method, this object is inventively achieved in that the region of the surface 1 of the texture drum 2
REFERENCES:
patent: 3371190 (1968-02-01), Meyer
patent: 3404254 (1968-10-01), Jones
patent: 3773565 (1973-11-01), Pye et al.
patent: 4348576 (1982-09-01), Anderl et al.
patent: 4393295 (1983-07-01), Beisswenger et al.
Optik, vol. 77, No. 2, Sep., 1987, W. Boppel, "Schnelles Elektronenstrahlgravierverfahren zur Gravur von Metallzylindern", pp. 83-92.
Stahl Und Eisen, vol. 110, No. 3, Mar. 14, 1990, R. Pankert; "Aufrauhen von Arbeitswalzen in Kaltwalzwerken" pp. 83-92.
Patent Abstracts of Japan, vol. 12, No. 445, Nov. 22, 1988, Yoshio Yamane "Surface Roughening Device For Rolling Roller".
Boppel Wolfgang
Sermund Gerald
Wilharm Michael
Linotype-Hell AG
Paschall Mark H.
LandOfFree
Method and apparatus for manufacturing a texture drum does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for manufacturing a texture drum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for manufacturing a texture drum will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-598971