US 3,950,895 AGranted

Method and apparatus for grinding work pieces

AssigneeOlin Energy Systems Limited

InventorRoland Peter Dakin

Life of this patent

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Abstract

A method and apparatus for grinding work pieces having internal chambers comprising loading blank work pieces onto respective ones of a plurality of mandrels provided on a rotatable member which member is rotatable about an axis of rotation extending parallel to the mandrels, the mandrels being equi-spaced about the axis of rotation; rotating the blanks on the mandrels; rotating a profiled grinding wheel; effecting rotary indexing of the rotatable member such that each of the blanks thereon successively moves relatively rapidly from a position spaced from the grinding wheel toward the grinding wheel to a position immediately adjacent the grinding wheel, moves relatively slowly from the adjacent position into contact with the grinding wheel and stops at the contact position for grinding to be completed, then moves rapidly away from the grinding wheel; and ejecting the ground work piece from the mandrel. Means are also provided for forming a through-passage axially in the work pieces.

Claims8

Dependent claims

An apparatus for grinding workpieces, said apparatus comprising:

a. a head rotatable about an axis;
b. a plurality of work-holders mounted on said head for receiving workpieces to be ground, said work-holders being equi-spaced about the axis of said head and movable along an arcuate path when said head is rotated about its axis;
c. grinding means mounted adjacent to said head said grinding means having a moving grinding surface positioned adjacent to said path to engage a workpiece moving along said path;
and
d. first drive means connected to said head for rotating the latter in step-wise fashion about said axis, said drive means being operative to impart an initial period of relatively rapid rotational movement to said head to rapidly move one of said work-holders and a workpiece mounted thereon from a position remote from said grinding means to a position closely adjacent to said grinding means, and then to impart a subsequent period of relatively slow rotational movement to said head to slowly move the workpiece mounted on said one of said work-holders from said position closely adjacent to said grinding means toward and into engagement with said grinding means grinding surface and then to hold said head against rotational movement when said one of said work-holders is in a grinding position until grinding of the workpiece is completed, and then to impart to said head a period of relatively rapid rotational movement to move said one of said work-holders and the ground workpiece rapidly away from said grinding means.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/560,911Filed 21 Mar 1975
Granted: 20 Apr 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B24B 5/025
Involving centres or chucks for holding work: involving indexable work supporting means carrying several work pieces to be operated on in succession
B24B 27/00
Machines, devices, or processes for grinding or polishing: other grinding machines or
B24B 41/005
Component parts such as frames, beds, carriages, headstocks: feeding or manipulating devices specially adapted to grinding machines
B24B
Machines, devices, or processes for grinding or polishing