US2703510A

US2703510A - Knee bracket arrangement for millingmachines, particularly copying-milling-machines

Info

Publication number: US2703510A
Application number: US245242A
Authority: US
Inventors: Zwick Kurt
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-09-13
Filing date: 1951-09-05
Publication date: 1955-03-08
Anticipated expiration: 1972-03-08

Description

March 8, 1955 K. ZWICK 2,703,510

KNEE BRACKET ARRANGEMENT FOR MILLING-MACHINES, PARTICULARLY COPYING-MILLING-MACHINES Filed Sept. 5, 1951 3 Sheets-Sheet 1 74 75/716? mm 7' z W/K'K,

' JITUPA/[Q- March 8, 1955 K. ZWICK 2,703,510

KNEE BRACKET ARRANGEMENT FOR MILLING-MACHINES, PARTICULARLY COPYINGMILLINGMACHINES Filed Sept. 5, 1951 3 Sheets-Sheet 2 K. ZWICK March 8, 1955 KNEE BRACKET ARRANGEMENT FOR MILLING-MACHINES, PARTICULARLY COPYING-MILLING-MACHINES 3 Sheets-Sheet 5 Filed Sept. 5, 1951 United States Patent KNEE BRACKET ARRANGEMENT FOR MILLING- MACHINES, PARTICULARLY COPYING-MILL- ENG-MACHINES Kurt Zwick, Munich, Germany, assignor to Hans Deckel and Friedrich W. Deckel, Munich, Germany Application September 5, 1951, Serial No. 245,242

4 Claims. (Cl. 90--13.1)

chine dare not exceed certain standard values, the diulfilh ment of the above-stated conditions encounters great difiiculties with such machines. These diflicul-ties consist in the fact that a large working range can only be obtained at the expense of the height of the hastened-on workpiece, and if the working range is to be increased, this can only be done due to the shorter length of the ways of the console, and this results, due to the smaller reach, in a smaller working range in the plane.

It has heretofore been attempted with previous machines to obtain relief in such a way that, in order to get a greatest possible height of the fastened-on workpiece, the ways of the console are shortened in advance; and, for the working of flat workpieces special set-on tables have been employed, which are supposed to compensate the deficient movability of the console. Such arrange ments, however, are complicated and ti-me consuming, and hence uneconomical.

The object of the present invention is to eliminate the disadvantages of the previous machines, and to create a machine which is, due to its great working range, universally employable, as well as simple and rapid in operation. This result is accomplished according to the invention in such a way that the knee brackets, serving to carry the preferably transversely-movable tables, that is the working or model table, are adjustably disposed in ways on an intermediate knee bracket, which latter is in its turn mounted for supplemental displacement on the machine, preferably on the machine pillar. With this arrangement according to the invention, therefore, the magnitude of the total movability of each of the consoles, is give-n by the magnitudes of the movabilities of the knee brackets and that of the intermediate knee bracket. In this way there can be obtained practically twice the movability of the table for the same dimensions of the machine. The machine of this invention permits the vertical adjustment of the knee brackets carrying the model and the workpiece within the limits of the top and to the bottom of the machine and also the relative or separate adjustment of said knee brackets. The range of adjustment of the knee brackets is increased over that heretofore possible. The increase of the height tor operations on the "fastened-on workpiece obtained by means of the intermediate knee bracket is one of the important advantages of my invention. It, tor example, the workpiece is high and the model is flat, it is not necessary to resort to the use of special underlai'd blocks in carrying out operations on the machine of my invention.

A preferred form of the invention is set forth in the specification hereinafiter following by reference to the accompanying drawings, in which:

Figure 1 shows a copying-milling-machi-ne in front elevation, embodying the invention;

Fig. 2 shows a side elevation of the machine shown in Pi g. l; and

Pig. 3 shows a top view of the machine of Figs. 1 and 2.

Referring to the drawings in detail the pillar '10 of the 2,703,510 Patented Mar. 8, 1955 copying-millingmachine is provided with vertical ways 12 on which there is displaceably mounted Ian intermediate knee bracket '14. The movement of the intermediate knee bracket 14 along the ways '12 is controlled through rotation of a handwheel v16. 'With the aid of conventional means, not necessary to illustrate here, the intermediate knee bracket l14 can be fixed in any position.

The intermediate knee bracket 14 is provided with two vertical ways 11%, 20, :on which there are displaceably mounted the

knee brackets

22 and 24, respectively. The handwheels .26 and 28 are respectively arranged tor controlling the displacement of

knee brackets

22 and 24; the knee brackets can be tfixcd in their prevailing position relatively to the intermediate knee bracket r14 with the aid of conventional means, not shown here. The knee bracket 22 carries a worktable 3'4, transversely displace able under control of handwheels =30, 32, while on the knee bracket 24 another table 36, that is the modeltable is mounted, likewise transversely displaceably through the intermediary of two turnbu-

ttons

38, 40.

The tables 34, :36 can, with the help of a coupling 42, be rigidly coupled in a particular position relatively to each otherin such a way that the movement of both of the tables 34, 36 in the plane only occurs under control of the displacing means of the one table, for example, the handwheels 30, 3.2 of the table 34.

The pillar also carries an articulation system 43 of a conventional type, in which there are mounted by means not shown the tool 44 and the copying peg "46. With the aid of a handle 48 on the articulation system 43 this system, together with the tool 44 and the copying peg 46, can be moved by the operator in all directions, in which the working of the workpiece '49 occurs according to a pattern 50.

As already explained, the

knee brackets

22, 24 for the tables 34, 36 are adjustably disposed on the intermediate knee bracket 14, which latter is, in its turn, mounted for supplementaldisplacement on the machine ways t1 2. Further, the paths of movement of the two knee brackets are in the same direction as the path of movement of the intermediate knee bracket. Through this arrangement a movement is brought about so that the tables can be displaced vert-ically in succession with the help of the knee brackets and the intermediate knee bracket. With flat workpieces, therefore, the knee brackets and the intermediate knee bracket are present in their uppermost position, and, conversely, with particularly high workpieces, in their lowermost position. With medium, and, of course, also with other workpieces, the individual movements of the knee brackets and the intermediate knee bracket can be combined as desired. In every case, however, the total vertical movement of the tables results from the vertical movements of the knee brackets themselves and of the intermediate knee bracket. in view of the fact that the adjustment of the :two knee brackets is approximately equal to the length of the displacement path of the intermediate knee bracket, there is obtained practically twice the range of adjustment movability of the console, and therewith of the tables, for the same dimensions of the machine.

Another great advantage of the arrangement according to the invention results from the fact that the workand the model-table are vertically displaceable on the intermediate knee bracket. Through this there is tailor-dad the possibility of extensively equalizing the difference in height between the workpiece and the model without its being necessary to resort to the use of special underlaid blocks as is the case with previous machines. Further, the new arrangement aflords the possibility, at 1:1 copying-milling, to raise and lower the workand the modeltable together.

Finally, it still remains to be noted that, in contrast to the arrangement herein described as the model, the expedients according to the invention could, of course, also be applied to machines with which the knee brackets carrying the tables are displaceable in another direction, for example, horizontally.

While a preferred form .of the invention has been shown it is realized that modifications may be made and it is to be understood that no limitations upon the invention are intended other than may be imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A copying machine having a machine column and including at least a first knee bracket supporting a workpiece and at least a second knee bracket supporting a model, an intermediate knee bracket, said knee brackets being adjustably mounted on said intermediate knee bracket means for independently adjusting said first and second knee brackets on said intermediate knee bracket, said intermediate knee bracket being adjustably mounted on said machine column, and means for selectively controlling the position of said intermediate knee bracket with respect to said machine column.

2. A copying milling machine having a machine column, an intermediate knee vertically adjustable on said column, a pair of knees mounted for vertical adjustment on said intermediate knee each of said pair of knees carrying a pair of horizontally adjustable tables, a cutter coaeting with one of said pair of tables, a tracer coaeting with the other of said pair of tables, and means individual to said intermediate knee and to each of the knees in said pair of knees for selectively adjusting said knees with respect to said machine column.

3. A copying machine having a machine column, two pairs of slides, two slides included in each of said pairs and movable in at least two directions, one slide being mounted on a support knee bracket and the second slide being mounted on the first one and an intermediate knee bracket, each. support knee bracket being vertically adjustably mounted on said intermediate knee bracket, said intermediate knee bracket being mounted for vertical adjustment on said machine column, and separate means for independently adjusting each of said knee brackets.

4. A copying machine including a machine column, a knee bracket, means for adjusting the position of said knee bracket on said column for vertical movement with respect to said machine column, a second knee bracket coupled with one end of said first-mentioned knee bracket and vertically adjustable thereon, a third knee bracket adjustably coupled with the other end of said first knee bracket and vertically adjustable with respect thereto and means on said second and third knee brackets for supporting a work piece and model, a cutting tool and copying tool supported with respect :to said machine column in positions above said second and third knee brackets, respectively, and separate means for independently adjusting the posit-ion of second and third knee brackets with respect to said first knee bracket.

References Cited in the file of this patent UNITED STATES PATENTS 1,889,930 Morton Dec. 6, 1932 2,154,514 Lange Apr. 18, 1939 2,247,462 Zwick July 1, 1941 2,357,062 Stoll Aug. 29, 1944