摘要:
In a method for the automatic gap setting in slide grinding machines having a turntable, the gap width between the turntable and the work container is automatically set by a regulation, with a reference value for the gap width of zero being determined.
摘要:
A centrifugal barrel polishing machine includes a barrel which is configured to perform planetary rotation and into which workpieces and ceramic polishing media are put, thereby polishing the workpieces by the polishing media. A relative centrifugal acceleration F during the planetary rotation of the barrel is set in a range of 2.1(n/N)+29.5≦F≦6.1(n/N)+40.7 where N designates a revolution speed of the barrel, n designates a rotation speed of the barrel, R designates a radius of an orbital path drawn by a rotation center of the barrel, n/N designates a rotation/revolution ratio of the barrel, and F=4π2N2R/g designates a relative centrifugal acceleration which is a ratio of a centrifugal acceleration on the orbital path during the planetary rotation of the barrel to gravity acceleration g.
摘要:
Systems and methods for comminution and shaping of solid particles in order to provide suitable fracking sands are disclosed. The systems and methods can include the use of a two-action scrubber designed to simultaneously rotate and move up and down in a vertical direction in order to promote interaction between the solid particles and the media. The scrubber can also use large particles separated from the feed stream as the media used to comminute and shape the particles fed into the scrubber for treatment.
摘要:
The invention provides a grinding machine for grinding grinding material by means of grinding bodies or wheels, having at least one grinding unit and two parts rotatable relative thereto, which has a container for receiving grinding material and a rotary disk placed above a container base, accompanied by the formation of a finite gap.
摘要:
Residual fine foreign matters are infallibly removed when manufacturing bearing parts. A removal process of residual fine foreign matters is taken before a high precision water-washing process in a manufacturing process of each component of a rolling bearing. Accordingly, residual fine foreign matters generated in a cutting process, a heat-treating process and a grinding process are removed, including metal powder like a metal chip and falling pieces of bearing components. In the removal process of residual fine foreign matters, ground pieces of corn-cob as a raw material are used for a grinding medium. Thus, damages to a surface of rolling bearing parts may be minimized during the removal process. Moreover, the medium is likely to accommodate to a surface of bearing parts, so that residual fine foreign matters may be effectively removed.
摘要:
Sharp edges formed during forging are removed from cam lobes by tumbling prior to machining of mounting bores which have been rough formed by punching. Tumbling effectively removes the sharp edges from non-hardened steel and prevents the formation of burrs caused by prior grinding techniques.
摘要:
This invention relates to a spiral-flow barrel finishing machine having a cylindrical stationary metallic barrel equipped with a lining layer at a lower inside portion. A rotating barrel is equipped with a lining layer on a metallic rotational body and is loosely engaged with the lower part inside of the cylindrical stationary barrel so as to rotate freely. A constant clearance is kept between the inner wall of the stationary barrel and the outer wall of the rotating barrel, regardless of the temperature change and the moisture content change. A measure to allow for thermal expansion having a specific vertical width, properly corresponding to the vertical width of the clearance, is circularly arranged between the inner wall of the metallic stationary barrel and the outer wall of the lining layer on the metallic stationary barrel. This makes an allowance for thermal expansion of the lining layer on the stationary barrel toward wall side of the metallic stationary barrel.
摘要:
A stone bevelling machine serves to round corners of bevelling stone. The machine comprises: a cylinder 2 rotating, and having a charge port on one end and a discharge port on the other end; a partition 3 separating the space within the cylinder 2 into a charge port side zone 2a and a discharge port side zone 2b, having a size-regulator gate 32 that selectively allows stones of the specified diameter or smaller to pass through the partition 3; and feeder vanes 24 being fixed at least to the inner wall of the charge port side zone 2a and protruding inward. During rotation, stone is cleared of corners thereof to be rounded when small stone, stone powder and stone chips pass through the size-regulator gate 32, so that the processing is enhanced in efficiency. If a trommel 9 is linked to the discharge port of the cylinder 2, it becomes possible to select stone or the like having passed through the discharge port.
摘要:
A centrifugal disk finishing apparatus utilizing dry media comprising a finishing chamber including an upstanding wall and a rotatable disk forming the bottom wall of the chamber. The disk is mounted in such a manner that a precision gap, known as a seal, is provided between the lower edge of the upstanding wall and the periphery of the disk. The seal extends upwardly and inwardly from the periphery of the disk. The construction of the wall and the support of the wall and disk is such that the disk and wall are rigidly maintained in concentric relation in all conditions of operation and load and therefore gaseous fluid under low pressure utilized in the finishing apparatus can flow readily from a chamber beneath the disk through the seal during operation of the apparatus.
摘要:
In a method of polishing a dental instrument, the dental instrument made of a ceramic material and having fine irregular portions along a surface thereof is placed in a container, together with a spherical ceramic whose grain size is 30.about.400 .mu.m, and an abrasive whose grain size is at most equal to 20 .mu.m and a liquid. The container is moved whereby the dental instrument is polished effectively.