US3509753A

US3509753A - Method of and apparatus for manufacturing the plates of plate-type heaters and the like

Info

Publication number: US3509753A
Application number: US613923A
Authority: US
Inventors: Peter Orth
Original assignee: Individual
Current assignee: Individual
Priority date: 1967-02-03
Filing date: 1967-02-03
Publication date: 1970-05-05
Anticipated expiration: 1987-05-05

Description

May 5, 1970 P. ORTH 3,509,753

METHOD OF AND APPARATUS FOR MANUFACTURING THE PLATES 0F PLATE-TYPE HEATERS AND THE LIKE Filed Feb. 5, 1967 3 Sheets-Sheet 1 May 5, 1970 P. ORTH 3,509,753

METHOD OF AND APPARATUS FOR MANUFACTURING THE PLATES 0F PLATE-TYPE HEATERS AND THE LIKE 3 Sheets-Sheet 2 Filed Feb. 5, 1967 May 5, 1970 P. ORTH 3,509,753

METHOD OF AND APPARATUS FOR MANUFACTURING THE PLATES 0F PLATE-TYPE HEATERS AND THE LIKE Filed Feb. 5, 1967 3 Sheets-Sheet 5 F/g, 4 Fig 5 United States Patent 3,509,753 METHOD OF AND APPARATUS FOR MANU- FACTURING THE PLATES 0F PLATE-TYPE HEATERS AND THE LIKE Peter Orth, 7 Montausstrasse, Opladen, Germany Filed Feb. 3, 1967, Ser. No. 613,923 Int. Cl. B21d 13/04 US. Cl. 72-177 9 Claims ABSTRACT OF THE DISCLOSURE There is provided a method and apparatus for making plates of plate-type heaters and radiators, the plates characterized by having transversely extending ribs and longitudinally extending ribs or channels and in which the transverse ribs are rolled out of the plane of the metal in one direction and the longitudinal channels are rolled out of the plane of the metal in the other direction.

This invention relates to a method of and an apparatus for manufacturing the plates of plate-type heaters and radiators, the plates having transversely extending ribs, from strip sheet metal. The invention is concerned with a rolling method and apparatus for the production of such plates.

For manufacturing the plates of plate-type heaters having transversely extending ribs, presses have been used, through which presses the strip sheet metal travels step by step and is deformed step by step in a deep-drawing process. A continuous working operation has hitherto only been feasible with plate-type heaters having longitudinally extending ribs or channels. The reason for this is that, in the case of plates having longitudinally and transversely extending ribs or channels, continuous rolling of the plates cannot allow a sufiicient compensation for the very different deformations of the longitudinally and transversely extending ribs and lateral channels, necessary for practical use of the known method. Known machines for rolling plate heaters or radiators are not generally able effectively to compensate for the different deformations of the metal sheets.

An object of the invention is to make it possible for the plates of plate-type heaters and radiators having transversely extending ribs or channels to be manufactured in a continuous rolling operation.

According to one aspect of the present invention, there is provided a method of rolling the plates of plate-type heaters and radiators from strip sheet metal, the plates having transversely extending and longitudinally extending channels or ribs, the method comprising forming longitudinal channels simultaneously with transverse ribs in the sheet metal by rolling out the ribs in one direction away from the plane of the sheet metal and the channels in the other direction away from the plane of the sheet metal, the channels being deep-drawn to a substantially greater depth than that of the ribs, so that the chan nels compensate for the longitudinal contraction of the sheet metal occurring in the plates during the rolling of the transverse ribs. By this means, a one-side or unbalanced deformation and thus an undesirable warping of the plates is avoided in a simple manner, since the deformations of the plates which are simultaneously produced in this way and extend in opposite directions substantially cancel out any irregularities. With the previously known pressing operations, on the other hand, the manufacturer has generally been content to press the ribs to be deepened into the metal sheets, the nature of the pressing operation making it possible for the remaining part of the sheet to be kept flat.

ice

According to another aspect of the present invention, there is provided an apparatus for rolling the plates of plate-type heaters and radiators from strip sheet metal, the plates having transversely extending and longitudinally extending channels or ribs, the apparatus comprising two oppositely rotatable rollers having interengaging ribs or rings and corresponding recesses or depressions, the first of the two rollers having around its periphery a series of projecting ribs for producing transversely extending ribs in the sheet metal, and having around its periphery annu lar depressions which are substantially wider and deeper than said ribs and which serve for receiving longitudinally extending channels formed in the sheet metal, the second of the two rollers having around its periphery a series of recesses corresponding to and engageable with said projecting ribs in said first roller, and having around its periphery annular projecting rings for producing the longitudinally extending channels in the sheet metal, said rings corresponding to and being engageable with said annular depressions in said first roller. In this way, it is possible by simple means and in a continuous rolling operation to manufacture a plate which is suitable for a plate-type heater or radiator and which requires only to be cut to the desired length. With the apparatus according to the invention, the recesses or depressions formed in the rollers are made substantially larger than the ribs or rings which engage in them, so that no lateral pinching or squeezing of the metal sheets occurs, but there is obtained a gradual transition between the channels and ribs in the sheet and the remainder of the metal sheet. The rings, ribs, recesses and depressions are so formed that the channels and ribs of the sheet are approximately equally and oppositely produced in relation to a common central plane which corresponds to the original plane of the metal sheet.

The rollers are preferably arranged vertically one above the other and are advantageously exchangeable, so that difierent profiles and different widths of metal sheets can be worked. In addition, a laterally adjustable guide device for the metal sheets can be provided after the deep-drawing rollers in the region of the deep-drawn longitudinal channels. This guide device should be adaptable to the diiferent widths of metal sheets without any difficulty. The guide device can also be used at the same time for completing the deep-drawing of the lateral channels.

One constructional example of an apparatus according to the invention for rolling the plates of plate-type heaters or radiators, is shown in the drawings, in which:

FIG. 1 is a side elevation of the apparatus,

FIG. 2 is a plan view thereof, and

FIG. 3 is on a larger scale a plan view of a part of a metal sheet shaped according to the invention.

FIGS. 3A and 3B are section views of the sheet portion of FIG. 3.

FIGS. 4 and 5 are on an enlarged scale sectional views of particular working rollers.

Referring firstly to FIGS. 1 and 2, the rolling apparatus 1 for making the plates 2 (FIG. 3) of plate-type heaters and radiators comprises two rollers 3 and 4 arranged vertically one above the other, the rollers being mounted in bearing blocks 5 and 6, respectively, in the frame of the apparatus so that they can be removed vertically. A known sheet-guiding device 7 is arranged before the two rollers 3 and 4, with respect to the intended working direction, and another guiding device Sis provided after the rollers.

The upper roller 3 has on its periphery a plurality of projecting ribs 9, which are accommodated in somewhat larger recesses 10 in the lower roller 4 during the actual rolling operation, as can be seen from FIG. 1.

The recesses distributed over the periphery of the lower roller 4 are at least so much wider and deeper than the ribs 9 of the upper roller 3 that the metal sheets to be shaped can be pressed without hindrance into the recesses. The upper roller 3 has a profiled recess 11 at each of its two ends, and the two recesses can be engaged by corresponding projecting rings 12 of the lower roller 4.

The guiding device 8 provided on the rear portion of the apparatus 1 consists essentially of upper and lower

lateral rollers

13 and 14, which grip the edges of the rolled and profiled metal sheets and thereby align the latter. The

rollers

13 and 14 are arranged on common support 15 and can be moved and adjusted relatively to one another together with these supports on

transverse rods

16 and 17 in order to be able to be adapted to the width of the metal sheets being worked. The rollers 3 and 4 are mounted to be replaceable, so that rollers of different Widths can be used.

The completed profile of a rolled metal sheet 2 can be seen from FIG. 3. By means of the ribs 9 and the recesses 10 of the rollers 3 and 4, transversely extending depressions 18 are rolled into the sheets, while channels 19 which are drawn in the opposite direction from the plates and extend longitudinally at the side are produccd by means of the annular recesses and

protruberances

11 and 12 of the rollers. Due to the fact that the metal sheet has been shaped in two different directions about its mean plane 20 by deep-drawing, particularly good strength properties are obtained and accumulations of material on one side are avoided.

Between the rollers 3 and 4 and the guiding device 8, two

roller sets

21 and 22 are arranged one after the other on each side of the apparatus, which rollers serve to complete the deep-drawing of the lateral channels 19 of the plates 2. By the first roller set 21, i.e. the deepdrawing roller set," the metal sheet, as is usual with deep-drawing, is initially shaped to beyond the neces sary final dimension, and, at the same time, the surface of sheet is smoothed; the following set of rollers 22, i.e. the upsetting roller set, upsets the metal sheet back to the required final dimension.

For this purpose, each deep-drawing roller set 21 consists of two profiled

inter-engaging rollers

23 and 24. The upper roller 23 is provided with circumferential recess 25 having an inwardly arched concave bottom face and an outwardly sloping lateral face 27. The lower roller 24 is provided with a correspondingly shaped profile ring 28 having an outwardly arched convex circumferential face 29 and a sloping lateral face 36. With each of these

rollers

23 and 24, a lateral channel 19 of the metal sheet 2 is worked by deep-drawing.

Each upsetting roller set 22 consists of similarly interengaging

rollers

31 and 32. However, the upper roller 31 is provided with a recess 32 which is less deep than the recess 25 of the roller 23 and the lower roller 32 is provided with a profile ring 34 which is less extending than the profiled ring 28 of the roller 24. The recess 33 has a flat bottom face and the profile ring 34 has a cylinder-shaped circumferential face 36. Between each of these

rollers

31 and 32, a lateral channel 19 of the metal sheet 2 is upset back to the required final dimension and the surfaces thereof are smoothed.

As the

rollers

13 and 14, the

roller sets

21 and 22 can be adapted to the varying widths of the metal sheets being worked.

What I claim is:

1. A method of rolling the plates of plate-type heaters and radiators from strip sheet metal, the plates having transversely extending and longitudinally extending channels or ribs, the method comprising forming longitudinal channels simultaneously with transverse ribs in the sheet metal by rolling out the ribs in one direction away from the plane of the sheet metal and the channels in the other direction away from the plate of the sheet metal,

the channels being deep-drawn to a substantially greater depth than that of the ribs and to a substantially greater depth than necessary and then are upset back to the desired final dimension, so that the channels compensate for the longitudinal contraction of the sheet metal occurring in the plates during the rolling of the transverse ribs.

2. A method according to claim 1, wherein the longitudinally extending channels are formed near the edges of the strip sheet metal.

3. A method according to claim 1, wherein the channels at first are rolled out together with the ribs, then separately are deep-drawn to a substantially greater extent than the desired. final dimension and thereafter are upset back to the desired final dimension.

4. Apparatus for rolling the plates of plate-type heat ers and radiators from strip sheet metal, the plates having transversely extending and longitudinally extending channels or ribs, the apparatus comprising two oppositely rotatable rollers having interengaging ribs or rings and corresponding recesses or depressions, the first of the two rollers having around its periphery a series of projecting rib for producing transversely extending ribs in the sheet metal, and having around its periphery annular depressions which are substantially wider and deeper than said annular depressions and which serve for receiving longitudinally extending channels formed in the sheet metal, the second of the two rollers having around it periphery a series of recesses corresponding to and engageable with said projecting ribs in said first roller, and having around its periphery annular projecting rings for producing the longitudinally extending channels in the sheet metal, said rings corresponding to and being engageable with said annular depressions in said first roller, and a laterally adjustable guide device for the edges of the sheet metal disposed after the rollers with reference to the direction of operative travel of the sheet metal.

5. Apparatus according to claim 4, wherein said annular depressions and annular projecting rings are formed near the ends of said first and second rollers, respectively.

6. Apparatus according to claim 4, wherein the rollers are disposed vertically one above the other.

7. Apparatus according to claim 4, wherein the rollers are arranged to be exchangeable.

8. Apparatus according to claim 4, wherein said guide device comprises rollers, the working surfaces of which are formed for completing the deep-drawing operation of the longitudinally extending lateral channels of the plates.

9. Apparatus as claimed in claim 8, wherein the guiding device comprise at least three sets of rollers, the upper roller of the first roller set of the guiding device has a circumferential recess provided with a concave bottom face and an outwardly sloping lateral face, the lower roller of said first roller set has a correspondingly shaped profile ring with a convex circumferential face and a sloping lateral face, the upper roller of the second roller set of said guiding device has a circumferential recess provided with a flat bottom face and the lower roller of said second roller set has a circumferential cylinder shaped face, the recess of the upper roller of the first roller set being deeper and the profile ring of the lower roller of said roller set being more extended than the recess and profile ring of the rollers of the second and further sets of rollers.

References Cited UNITED STATES PATENTS 2,631,557 3/1953 Larkin 72l96 2,370,702 3/1945 Yoder 72-177 FOREIGN PATENTS 637,660 6/1960 Great Britain.

MILTON S. MEHR, Primary Examiner