Abstract: A barrel finishing machine includes a dual barrel structure including a cylindrical stationary container and a rotary container concentrically mounted in the stationary container for rotation, with a small gap between them. Linings are formed from an elastic material and are provided to cover inner surfaces of the stationary and rotary containers respectively, and a stopper is mounted in the lining of the rotary container at a position in the vicinity of an outer circumferential edge of the rotary container. The stopper is effective to restrain expansive deformation of the lining of the rotary container due to thermal expansion. The stopper circumferentially rises from a base of the rotary container. The stopper member is detachably attached relative to the base of the rotary container.

Abstract: A method of and an apparatus for removing any burrs or other undesired defects from a workpiece having a bore therein is disclosed. Specifically, those burrs or other defects that are to be removed may be present on the marginal edge or interior of the bore. The method and apparatus are specfically designed to allow a rotary tool to meet the specific relationship requirements between the number of revolution (n) and number of reciprocating motions (N), i.e., 1/3.ltoreq.n/N.ltoreq.1, when the rotary tool travels forward and backward within its specific stroke range.

Abstract: A method of and an apparatus for removing any burrs or other undesired defects from a workpiece having a bore therein is disclosed. Specifically, those burrs or other defects that are to be removed may be present on the marginal edge or interior of the bore. The method and apparatus are specifically designed to allow a rotary tool to meet the specific relationship requirements between the number of revolutions (n) and number of reciprocating motions (N), i.e., 1/3.ltoreq.n/M.ltoreq.1, when the rotary tool travels forward and backward within its specific stroke range.

Abstract: A full-automatic multi-function workpiece finishing machine provides different types of operations that can be caused to occur in any sequence that meets the requirements for a particular type of workpieces to be surface-finished. The machine includes a series of individual operational or functional units which are controlled by a computer-based sequence controller. The sequences of the different types of operations may be identified by unique code numbers which are entered into the computer from the terminal keyboard or by reading them by any optical or other means.

Abstract: A method consists of causing a barrel container to revolve with less than the numbers of axial and orbital revolutions n and N defined as n=42.2/.sqroot.d x.sup.4 .sqroot.1+x.sup.2, where n is the number of axial revolutions per minute for the barrel container, x is ratio of the centrifugal force produced and the gravity, equal to o<x.ltoreq.1, d is the diameter of the inscribed circle of said barrel container; and N=42.2/.sqroot.D, where N is the number of revolutions per minute and D is the distance, in meter, twice value from the revolving axis and rotating one; and causing a resultant force substantially equal to 1G<Y.ltoreq..sqroot.2G where Y is defined as the resultant force to be produced by the centrifugal force combined with the gravity action and given to the mass within the barrel container.

Abstract: In a gyrofinishing machine, each of the gyratory shafts for holding individual works is controlled by the combination of rack and pinion and the crank mechanism for driving the rack and pinion combination so that the particular part of a work held by the corresponding gyratory shaft can be exposed for the longer time to the abrasive media used for finishing the work, and the gyratory shaft can be stopped at the particular position with high accuracy.

Abstract: A high-speed work finishing machine includes a plurality of work finishing units each supported by a high-speed turret for carrying barrel containers to be driven for both orbital and axial rotations. It further includes a circulating transport path for carrying a barrel container from the unloading location where it is to be demounted from a work finishing unit to the loading location where it is to be mounted to the same unit, and various means disposed along the circular transport path between the unloading and loading locations, those means involving the handling of a barrel container and/or the works and abrasive media under the control of a central programmable sequential controller.

Abstract: In the centrifugal barrel finishing machine of the type having X barrel assemblies, in which X is an integer, a method finishing workpieces whereby during a given total finishing time Y of the workpieces, each succeeding assembly containing finished workpieces is to be replaced with another assembly containing unfinished workpieces at the end of each time interval of Y/X. The workpieces in each succeeding assembly are finished X number of times each of which is for a duration of time equal to Y/X. In this way, the workpieces in each succeeding assembly can be replaced with workpieces to be finished as the finishing in the preceding unit has been completed, thereby permitting a continuous finishing process and barrel assembly replacement for each succeeding assembly without the need for exchanging the mass in all the barrel assemblies at the same time.

Abstract: For use with a container with a removable cover at the top opening, at least one pair of cover tightening members are pivotally linked with each other and are mounted to the cover so that they can be operated to tighten the cover to the container or release it from the container. Specifically, each of the tightening members has an internally threaded central bore through it for accommodating its operating member which is also threaded to engage the central bore. The tightening member further includes stationary or fixed pawls at both ends thereof that engage or disengage with the flanged lateral sides of the container. Thus, when the operating member advances through the central bore, the pawls are disengaged from the flanges to allow the cover to be removed from the container, and when operating members are retracted, the pawls are made to engage the flanges to tighten the cover to the container. In either case, one tightening member is operatively associated with the other by means of the pivotted links.

Abstract: In the centrifugal barrel finishing machine of the type having X barrel assemblies, in which X is integer, the method and apparatus are provided whereby during a given total finishing time Y of the workpieces, each succeeding assembly containing finished workpieces is to be replaced with another assembly containing unfinished workpieces at the end of each time interval of Y/X, during which the workpieces in each succeeding assembly is to be finished for the number of X times, that is, equal to the number of X assemblies. In this way, the workpieces in each succeeding assembly can be replaced with workpieces to be finished in each time at the finishing for the processes in the preceding unit has been completed, thereby permitting continuous finishing process and replacing tasks for each succeeding assembly, and thus eliminating the need of exchanging the mass in all the assemblies at a time during stopping.