US1840051A - Milling machine - Google Patents

Description

L. F. NENNINGER MILLING MACHINE Jan. 5, 1932.

Filed Aug. 5, 1927 Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE LESTER F. N EN N INGER, 0F CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATI MILLING MACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO MILLING MACHINE Application led August 5, 1927. Serial No. 210,867.

This invention relates to improvements in milling machines or like machine tools and has particular reference to the frame structure thereof.

In the operation of milling machines or the like for quantity production considerable diiiiculty is frequently experienced due to piling up of the removed chips and the making of proper disposition of these so the will not clutter up the floor, interfere witi proper loading and removal vof the work or operation thereof and at the same time so that the chips permit of vtheir being readily collected.

Also, the presence of the piled chips on the tabletends to cause undue splashing or spreading of the coolant and involves diiiiculties in the proper leading of the coolant back into the cooling pan on the machine for reutilization. v

It is therefore the purpose of the present invention to provide an improved machine tool structure which shall satisfactorily take care of and substantially automatically collect the chips and prevent their being spread over the floor and about the machine.

'A further object of the invention is the provision of improved structure which will most satisfactorily care for the coolant and collect the same with minimum of splashing, thus keeping the machine as an entirety and the ioor therearound in a more clean, healthy and sanitary condition.

Other objects and advantages of the present invention should be readily apparent by reference to the following specication taken in connection with the accompanying drawings, and it will be understood that I may make any modifications in the specific structural details hereinafter disclosed within the scope of the appended claims, without departing from or exceeding the spirit of the invention. v

Figure 1 is a side elevation of a milling machine embodying these improvements.

Figure 2 is a plan view of the front portion of the bed and table, and

Figure 3 is a vertical section as on line 3-3 of Figure 2.

In the drawings the numeral 10 designates the main bed portion of a. milling machine having secured thereto the column 11 supporting the spindle 12 for arbor 13 bearing the milling cutter 14.

As will be best understood by reference to Figure 3 the bed 10 in place of being substantially solid is in the form of a hollow shell providing a large interior chamber as at 15 and a second subtending smaller chamber 16. Projecting inwardly of the bed intermediate these chambers is the flange 17 which provides a support for the removable screen member 18. Below the flange 17 the bed is further formed with the interior rib 19 forming a sliding support for the peripheral iange 20 of the coolant pan 21.

As is shown in Figures 2 and 3 the bed is substantially open at the top throughout its length except for the transverse ribs 22 disposed at a plurality of points and serving as bridge truss members both bracing the bed and supporting the longitudinal plate or casting 23, providing the Ways 24 for,I the longitudinally shiftable work supporting table 25. This table 25 it will be noted has at one end the trough portion 26 having a discharge end or return 27 which extends back over the open space 28 of the interior of the bed at its limit of movement as shown in Figure 2, so that coolantand chips from the table will at all times be discharged into said 4open space.

From the foregoing description the general structural features of the present invention should be readily apparent and it will be noted that there has been provided at the upper part of the bed of the machine, in place of a solid topa skeleton framework or support constituting guideways for the Work supporting table having at each side `thereof completely open coolant and chip receiving spaces through which both coolant and chips may drop into the interior of the machine and whose entrances are so large as to absolutely prevent any possibility of clogging, interfering with the passage of either the solid or liquid material.`

It will further be noted that by this construction the bed itself forms the containing chamber for separation of the solid and liquid matter, in which a large receiving chamber is rovided for the chips or soli matter whic build up and increase in volume and at the same time a smaller but sui- 6 ciently large chamber to receive the return coolant which may consequently be readily reutilized.'

In order that all of the cltigs and the coolant may be roperly direc into the inte- 10 rior of the bed, use is preferably made of lateral guide members 29 either integral with the bed or auxiliary members removabl secured thereto and extending u ward a ove the top of the table. With suc a structure l5 the workman may easily brush the table, all

rticles carried over to the side, dropping own into the bed and bei separated rom the coolant by the interme ate screen member 18.

To facilitate removal of the chips 30 there is Apreferably provided in one end of the bed a cleaning aperture 31 while the bed is also formed with a second aperture or guideway 32 through which the coolant pan 21 may be removed when desired.

It will further be'noted that by the removable supporting of the screen `18 the chips therefrom may be thus withdrawn through aperture 31 or the screen itself may be taken out through said aperture for suitable cleaningewhenever there may be tendency of same to come clogged.

1. As an article of manufacture, a milling machine bed casting comprising a hollow shell having enclosing side and end walls, transverse truss ribs integral with and connecting said side walls, a longitudinally ex' tending skeleton frame member integral 40 with and centrally connecting said ribs said member having table engaging ways formed on the u per face thereo substantially as and for t e purpose described, said integral casting havin additionally inwardly extending rib or ange portions formin a partial lower closure for the enclosed c amber of the bed casting and adapted to support a member for rece tion of discharge from the machine table wiien in use.

2. A bed unit for a milling machine or the like comprising a hollow rectangular shell having joined end and side walls providing an interior chamber, a coolant reservoir forming a closure for the bottom of the chamber, a erforated chip receiver superimposed on sai reservoir, spaced transverse ribs connected to the side walls at the u per portion whereof to laterally brace the wa ls and form large chip and coolant passages between the same, a frame member of less width than the bed extending lon 'tudinally thereof and sup orted by the ri s, guideways formed on sai member and a table slidably mounted on said guideways, said table being of substan- 5 tially the same width as said member whereby chips and coolant may fall by gravity therefrom directly through said passa es to the receivers in the bottom of the b 3. A machine tool having a bed com rising inte ally connected end and side wa ls one of t e walls having an attachment surface formed thereon, a column mounted adjacent the bed and attached to said surface, spaced ribs integrally connected between the side walls for bracing the same a frame mounted in the top of the bed and extending transversel space relation to the side walls forming a series of longitudinal openings between each side of the frame and the adjacent side walls, a table reciplrocably mounted on said frame, means to 'vide the interior of said bed into a large and small chamber in superimosed relation to one another, achip receiver ormed in the bottom of the large chamber and a coolant receiver mounted in the small chamber, whereby chips and coolant will fall directly from the said table through said opening and be collected and separated by said receivers.

4. A machine tool having a bed com rising integrally connected end and side wa ls, one of said walls having an attachment surface formed thereon, ay column mounted adjacent to the bed and attached to said surface, spaced ribs and extending transversely thereof and substantially parallel to but integrally connected between the side walls for bracing the same, a frame mounted in the top of the bed on said ribs in spaced relation to the side walls to form a longitudinal series of o nings between each slde of the frame an the adjacent side wall, longitudinal guidewa s formed on the frame, a table reciprocab y mounted on said guideways, an internal flange projecting from said walls of said bed dividin the interior thereof into upper and lower c vembers, a chip receiver supported by said flange whereby chips will be collected in said upper chamber, an internal rib roj ecting from the walls of said lower chamer, a coolant reservoir supported on said rib, one of said end walls having an o ening therein whereby chips may be remove from the upper chamber during the operation of the machine.

5. A machine tool having a bed comprising integrally connected end and side Walls formin a rectangular interior chamber, one of sald walls having an attachment surface formed thereon, a column mounted on said bed and attached to said surface, spaced ribs having inclined upper surfaces integrally connected between the side walls for bracing the same, a frame mounted in the top of said bed and extending transversely'of and su ported b said ribs in spaced relation to the side wal s to form a longitudinal series of o enin between each side of the frame and t e adjacent side wall, longitudinal guideof and supported by said ribs in ways formed on the frame, a table reciprocably mounted on the guideways a trough portion formed at the end of the table having a return overlying the bed to discharge into one of said openings, an internal flange projecting from the side walls of said bed dividing the interior thereof into upper and lower chambers, a chip receiver supported by said flange, whereby chips will be collected in said upper chamber,fan internal rib projecting from the Wall of said lower chamber, and a coolant reservoir supported on one of said ribs, said end Walls having openings whereby the chips may be removed during operation of the machine.

In testimon whereof I aix my signature.

L STER F. NENNINGER.

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