US1766115A - Profiler and miller - Google Patents

Description

June 24, 1930. s. EINSTEIN v PROFILER AND MILLER Filed Nov. 6, 1923 5 Sheets-Sheet 2 June 24, 1930. s. EINSTEIN momma AND MILLER 3 Sheets-Sheet 3 Filed Nov. 6, 1923 (Zn/en or sdm Z fi'iarzze aummm Patented June 24, 1930 Parn- SOL EINSTEIN, OF CINCINNATI, OHIO, ASSIGNOR '10 CINCINNATI MILLING MACHINE COMPANY, OF CINCINNATI, OHIO, A CCRlPORATION OF OHIO PROFILER AND MILLER Application filed November 6, 1923. Serial No. 673,116.

This invention relates to milling machines and it proposes a simple structural arran ement aifording a great universality in t e relative movement between the cutter and the work. In the reproduction of a given contour, as for example of a cam, it is necessary for the tool to follow a path relative to the work such that the given contour will be exactly reproduced, and in some cases, it' is desirable that the contour shall be in a horizontal plane during the tooling operation, and in other cases in a vertical plane. When thus profiling, it is desirable, that the relative movement shall be obtained partly by bodily shifting the Work and partly by bodily shifting the cutter and, since the contour will be a resultant of these two movements, it is necessary that these respective movements may be accomplished both simultaneously and independently and at varying respective rates depending upon the character of the contour.

The aim of this invention is to render available a simple compact mechamsm 1n the nature of a so-called miller which will enable the user very readily to obtain a wide diversity of relative movements by the simple manipulation of two or more handlevers. It may be explained that, as an ald to the user, this mac ine contemplates the employment of a sample contour aflixed to the work-carrier and a follower afiixed to the tool-carrier, or ponversely; the head of the follower being identical insize and shape with the cutter so that by manipulating t e machine to keep the follower always in contact with the sample contour, the cutter will necessarily cut a profile identical with that of the sample.

It is also an object of this invention to devise a machine of the foregoing description in which the various elements are conveniently and compactly arranged and which embodies simple stops and accurate adjustments for facilitating the setting and g the control of the machine.

A further object has been to design a sturdy machine in the form of a self-contained unit embodying a motor-drive so ar-' ranged that the various movements may take place without in any manner disturbin the smooth running and correct setting of the transmission. 1

Other objects and advantages will be in part indicated in the following description and in part rendered apparent therefrom in connection with the annexed drawings.

To enable others skilled in the art to fully apprehend the underlying features hereof that they may'embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote corresponding parts throughout all the views, of which:

Fig. 1 is a side elevation of a complete machine embodying the principles of this invention. Fig. 2 is a front elevation thereof. Fig. 3 is a fragmentary right-hand side view of the head showing a micrometer stop for adjusting the up-and-down limits of movement of the spindle. Fig. 4 is a frag mentary cross-section through line 44 of Fig. 3, and Fig. 5 is a vertical longitudinal section through the front-end portion of the mechanism.

In this embodiment of the invention, a table or work-carrier A is slidable horizontally across the end of the machine and a spindle-head B is slidable in either one of two directions, i. e., vertically or horizontally transversely to the feed of the table. Thus, the work and the cutter are shiftable relatively in each one of the three dimensions of space thereby rendering it possible to reproduce any predetermined contour.

Certain intervening frame elements so support the major elements A and B as to provide for the above-mentioned diversity of movement and, in the illustrated preferred organization, the frame element on which the table A is directly slidable has been utilized to constitute the bed C of the machine. This bed is'formed with a lower ledge 1 providing a slide-way 2 for the table, and an upper surface 3 providing a slideway 4 for an auxiliary frame D which is substantially balanced by the weight of the spindle mounting its'one end, and by i motor E at its other end.

That is to say, the forward end D' of the auxiliary frame D has a vertical slide-way 5 up-and-down which may move the spindlehead B and a part of this end D is in the nature of a bracket 6 Within which is journaled the hub 7 of a pulley 8 through the bore of which is splined the spindle F so that the latter may move up-and-down without shifting the pulley 8.

The motor E which is secured to the end face 9 of the part D" of the auxiliary frame D has its shaft 10 arranged vertically and carrying a pulley 11 which is in horizontal alignment with the pulley 8 that drives the spindle. A belt 12 extends horizontally from the one pulley to the other so that the power is transmitted in a straight line and the alignment of the belt remains constant irrespective of all .movements of the spindle whether up-anddown or laterally. In other words, the spindle and its source of power is in the nature of a self-contained unit that admits of being bodily shifted as a whole on the bed C to accomplish movements parallel with the plane of the table surface, and the spindle B is capable of independently moving towards and away from the surface of the table at right angles thereto.

For ease in accomplishing these three movements, three hand-levers X, Y and Z are provided; the lever X being attachable through a clutch 13 to a shaft 14 journaled in the bed and having a pinion 15 meshing with a rack 16 for feeding the table. The lever Y is likewise connectible through a clutch 17 with a shaft 18 that carries a gear 19 meshing with a rack 20 for feeding the auxiliary frame 'D. The purpose of the clutches 13 and 17 isto enable either the table or the auxiliary frame to be set approximately into any position and then to connect the hand-lever so that it maybe manipulated from its own most convenient position. The third lever Z is connected to a shaft 21 whichcarries a gear segment 22 engaging a rack 23 aflixed to the spindle-head B so that the latter may be moved up-and-down in the slide-way 5 provided by the front end of the auxiliary frame D. The weight of the spindle-head is somewhat over-balanced by a contractile spring 24 (see Fig. 5) so that the cutter will not, through the action of gravity, inadvertently engage the work and so that the user, in manipulating the lever Z, will not be obliged to work against gravity.

The spindle-head B is hollow and provides suitable bearings25 and 26 at its upper and lower ends, respectively, and a collar 27 keeps the spindle from moving downwardly relative to the head B, and a shoulder 28 keeps it from moving upwardly relatively to the head B. Thus, the spindle is rotated by the pulley 8 and it is moved up and down complish its proper functions.

as the head B moves up-and-down, and it is shiftable laterally when the head is bodily shifted laterally by the movement of the auxiliary frame D.

For certain purposes, it is desirable that the vertical movement of the head B may be automatically stopped at a predetermined distance from the table. To that end, a stopplate G is affixable to the side of the head by means of bolts 29 and this stop-plate has recesses 30 at its respective ends; these recesses being spaced apart a distance corresponding with the desired limit of movement of the spindle head. A detent plunger 31 (spring pressed by a coil 32) is mounted in an adjustable bracket 33 whlch by means of a bolt 34 may be secured in any desired position to the auxiliary frame D. As an aid to obtaining a very accurate setting of the bracket 33, a micrometer screw 35 is mounted in an auxiliary bracket 36 which may he initially secured in place by a bolt 37 and then by operating the micrometer screw 35, the exact position of the bracket 33 may be secured and the latter may then be clamped in place by the bolt 34. ,The spindle-head may thus be moved up and down by the hand-lever Z and, at its limits of movement, the detent 31 will snap into place. To release the detent, a small hand-lever W may be manipulated; this hand-lever being journaled in the bracket 33 and having a finger 38 controlling the detent 31.

For profiling purposes, as has already been explained, this invention contemplates a sample profile or master template afiixed to the table and a follower carried by the spindle-head which is adapted to be guided by the master template. The shank of the follower may be affixed to the head by either one of the two vises H or K. To this end, the spindle-head B is provided with lateral slotted wings 38 and 39; the vises being afiixed in place by T- bolts 40 and 41. Bolts 42 and 43 serve to bind the jaws of the vises on to the shank of the follower and hold it in whatever position it has been set to ac- In Figs. 1, 2 and 3 of the drawings one follower is shown held in position by the T bolt,40.

The follower 60 engages a template 61.

The template 61 and the follower 60 are shown in position to form a contour in a plane parallel to the plane of the table.

Other followers and templates may be provided for forming contours in planes perpendicular to the plane of the table.

When it is not desired to have the head B shift vertically, it may be clamped solidly to the auxiliary frame D; and likewise when it is desired that the head shall not shift laterally, the auxiliary frame D may be clamped solidly to the bed; the parts being provided with appropriate clamps, as will be understood, for that purpose.

It will thus be perceived that this invention is well adapted to achieve the purposes and objects set forth in the foregoing and that the structural organization is essentially simple, sturdy and compact and admits of being operated with great universality b the slmple manipulation of convenient han levers all of which are immediately accessible to a user located at the front end of the machine. 7

Without further analysis, the foregoing will so fully reveal the gist of this invention that others can, by applying current knowledge, readily adapt it for various utilizations by retaining one or more of the features that, from the standpoint of the prior art, fairly constitute essential characteristics of either the generic or specific aspects of this invention and, therefore, such adaptations should be, and are intended to be, comprehended within the meaning and range of equivalency of the following claims.

Having thus revealed this invention, I claim as new and desire to secure the following combinations and elements, or equivalents thereof, by Letters Patent of the United States:

1. A milling machine combining a main frame; a work-table translatably mounted on horizontal guideways provided by said main frame; manual means operable from the front of the machine for translating said work-table; an auxiliary frame translatably mounted on horizontal provided by the main frame above plane of the table guideways and arranged at right angles thereto; manual means operable from the front of the machine for translating said auxiliary frame on said main frame; an electric motor mounted on one end of said auxiliary frame; a spindle head translatably mounted on vertical uideways provided by said auxiliary rame; a tool spindle rotatably but nontranslatably journaled in said spindle head; yielding means for normally maintaining said spindle head and spindle elevated; manual means operable from the front of the machine to depress said spindlehead to give to the tool vertical movement relative to a work piece carried by said table; a spindle rotating pulley journaled on said auxiliary frame and having a spline connection with sald pulley; and a driving connection between said motor and said pulley.

2. A profiling machine, combinin 5 a bed affording a horizontally dispose table guideway extending substantially parallel with the having a narrow upstanding portion affording in its upper surface a second guideway extending at right angles to said table guideway; a, work-table translatably mountguidewa s the front of said bed, said bed also I ed on said table guideway; a narrow frame 'translatably mounted on said second guide-- way; a spindle-head vertically movable on guideways provided by said frame; a rotatable tool spindle journaled in said head; 1

three independent rack and pinion mechanisms for moving said work-table, frame and spindle, respectively, to effect relative movements vertically and horizontally between the work carried by said work-table and a tool carried by said spindle; a first lever carried by said translatable frame and arranged closely adjacent one side thereof for actuating the spindle-head translating a second lever rack and pinion mechanism; carried by. the upstanding portion of said bed at the side thereof opposite the first named lever for actuating the frame-translating rack and my name.

SOL EINSTEIN.

subscribe pinion mechanism; and a third lever supported at the front edge of

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