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Description: |
| Abstract:
This invention relates to machines for grinding, polishing, buffing, and similar operations, said machines being of the type wherein several grinding and/ or polishing or similar elements are mounted at intervals along a conveyor, the work being carried by said conveyor beneath the various wheels in succession. This type of apparatus may be of any desired length, usually in the neighborhood of twenty to eighty feet, and the wheels are usually arranged to form a progression as to character of the work done; for example, the wheel at the first station or first few stations will be rough and the succeeding wheels finer, so that if the machine is long enough and has a sufficient number of stations, work may be completed from a rough to a polished condition in a single passage through the machine.
In this type of machine the means for driving the conveyor and the mechanism used at each station are to some extent independent, and the present application has reference to the latter.
Claims:
l. A grinding and polishing machine comprising in combination, a belt adapted to convey work, and a plurality of grinding or polishing units mounted in operative position above said belt, means for adjusting each of said units both horizontally and vertically, said vertical adjusting means comprising counterweights and a combined float and dash-pot.
2. A grinding machine of the class described, comprising in combination a conveyor, a base, means at the top of said base for supporting a one end a grinding wheel and at the other end driving means for the same, adjustable balance means on said arm, positive means between said arm and said bed plate for limiting downward movement of said arm, and tank means in said base for resiliently supporting said grinding wheel arm.
3. A grinding machine of the class described, comprising in combination a conveyor, a base, means at the top of said base for supporting a part of said conveyor, a tank within said base, a bed plate rotatable upon the top of said base, a bracket carried by said bed plate, an arm pivoted to said bracket and movable in a vertical plane, said arm carrying at one end a grinding wheel and at the other end driving means for the same, adjustable balance means on said arm, positive means between said arm and said bed plate for controlling movement of said arm in one direction, and means in said tank connected to said grinding means for damping the vibrations of said arm and partially supporting the same.
4. A surface conditioning machine of the class described, comprising in combination a conveyor, a base, a table supported by said base, said table supporting a part of said conveyor, a tank within said base, a bed plate rotatable upon said table, a horizontal pivot carried upon and above said bed plate, an arm carried by said pivot, said arm carrying at one end a surface conditioning wheel and at the other end driving means for the same, balance means adjustable as to position on said arm, positive means between said arm and said bed plate for limiting the movement of said arm in one direction, and means in said fluid receptacle for damping the vibrations of said arm and partially supporting the same and connecting means between said damping means and said surface conditioning means located upon the horizontal axis of rotation of said bed plate.
5. In a surface conditioning machine in combination, a surface conditioning wheel, an arm supporting the same, a bed plate on which said arm is supported in xed horizontal relation, a table whereon said bed plate can be turned about a vertical axis, a base supporting said table and constituting a tank, a circular opening through the top of said table into said tank disposed with said vertical axis central thereto, a portion of said table revolubly mounted therein and depending from said bed plate, a central aperture through said portion and a tube extending down through said aperture, means whereby said tube supports said arm, and a float supporting said tube.
6. In a surface conditioning machine, in combination, a surface conditioning wheel, an arm supporting the same, a bed plate on which said arm is supported in fixed horizontal relation, a table whereon said bed plate can be turned about a vertical axis, a base supporting said table and constituting a tank, a circular opening through the top of said table into said tank disposed with said vertical axis central thereto, a portion of said table revolubly mounted therein and depending from said bed plate a central aperture through said portion and a tube extending down through said aperture, means whereby said tube supports said arm, a float supporting said tube, said float being of a size to slightly clear the internal walls of said receptacle, said float being built of elements no one of which is larger than said central opening, but said float as a whole being larger than said opening.
7. A surface conditioning machine of the class described, comprising in combination a conveyor, a base, a table supported by said base, said table supporting a part of said conveyor, a tank within said base, a bed plate rotatable upon said table, a horizontal pivot carried upon and above said bed plate, an arm carried by said pivot, said arm carrying at one end a surface conditioning wheel, a float in said tank, liquid in said tank, a rod connecting the wheel-carrying end of said arm with said oat, a restricted passage between the side of said float and the side of said tank whereby said float may act as a dash-pot, and means for varying the size of said float.
8. In a surface conditioning machine, an arm movable about a horizontal pivot, a surface conditioning wheel carried by said arm, buoyant means operatively connected to said arm to influence the effective operating pressure of said wheel, said buoyant means being of sectional construction, the number of sections thereof being variable.
9. In a surface conditioning machine, an arm movable about a horizontal pivot, a plate movable in a horizontal plane supporting said pivot, a surface conditioning wheel carried by the free end of said arm, a float beneath said surface conditioning wheel and below the level of said plate, an upstanding stem carried by said float and adapted to be engaged by the free end of said arm, said stem coinciding with the center of rotation of said plate.
10. A surface conditioning machine of the class described, comprising in combination a conveyor, a base, a table supported by said base, said table supporting a part of said conveyor, a bed plate rotatable upon said table, a horizontal pivot supported upon and above said bed plate, an arm carried by said pivot, said arm carrying at one end a surface conditioning wheel, a tank in said base beneath the wheel-carrying end of said arm, a oat in said tank, means connecting the wheel carrying end of said arm with said float, said means including a hat bearing.
1l. A surface conditioning machine of the class described, comprising in combination a conveyor, a base, a table supported by said base, said table supporting a part of said conveyor, a tank within said base, a bed plate rotatable upon said table, a horizontal pivot carried upon and above said bed plate, an arm carried by said pivot, said arm carrying at one end a surface conditioning wheel, a float in said tank, liquid in said tank, a rod connecting the wheel-carrying end of said arm with said float, and a dust-guard surrounding said rod above said tank.
12. In a surface conditioning machine, an arm movable about a horizontal pivot, a surface conditioning wheel carried by said arm, and means engageable with said arm for limiting the downward motion thereof or for imparting upward motion thereto, said means comprising a stop adapted for engagement with an element of said arm, and air cylinder means for maintaining said stop in selected position or for lifting said stop.
13. A grinding machine comprising a plurality of grinding elements each individually automatically movable up and down with respect to the work and means for lifting said grinding elements comprising an individual lifting control for each machine and a simultaneous control for a series of machines.
14. In a grinding machine, as a sub-combination, a swinging arm, a grinding wheel carried thereby, a pressure cylinder engageable with said arm and being reciprocable by pressure means and rotatable by other means, a stop carried by said cylinder, said other means being adapted to position said stop with respect to the arm and said pressure means being adapted to move said stop and thereby move said arm.
15. A grinding head comprising a swinging arm, a grinding wheel carried thereby, a stem adjacent said arm, means for admitting air through said stem, a cylinder fitting over said stem and reciprocable with respect thereto, the upper end of said cylinder forming with said stem an expansible fluid tight chamber, screw threads on the exterior of said cylinder, and a stop threaded thereto and adapted to be positioned there along by rotation of said cylinder and being engageable with said arm.
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