Showing papers on "Cutting fluid published in 1990"

Horizontal boring apparatus and method

Abstract: Boring apparatus for forming a generally horizontal underground passage for a utility conduit or the like that includes a tool head with elongated body structure and a cutting face of ellipto-conical form at one end of the elongated body structure. The cutting face has a major axis and a minor axis and cutting bit structure is fixed to and projects forwardly from the cutting face and extends substantially the full width of the cutting face generally along the major axis. The tool head also includes coupling structure for attaching the tool head to a drill string such that the cutting tool face is offset from the drill string axis. Structure in the cutting face defines a cutting fluid orifice adjacent the cutting bit structure for directing a high velocity jet of cutting fluid forwardly of the cutting tool face. The tool body is adapted to be advanced and concurrently driven in rotation to move the cutting face in orbital boring action about the drill string axis to bore an underground passage and to be advanced without rotation to produce a change in direction of the underground passage in the direction of offset from the drill string axis.

Cutting tools such as drills, reamers, end mills and the like

Abstract: The present invention refers to a cutting tool such as drills, reamers, threading tools and the like. The idea of the invention is that in the tool shaft (1) there has been provided channels (5) for cutting fluid, which channels lead into or near the helical grooves (3) in the web part (2) of the tool.

Metal cutting machine tool - has integrally formed shaft for fitting in socket of machine tool spindle

Abstract: The metal cutting tool for a machine tool has a body (1) with a first integrally formed shaft (3), which carries the cutting insert (4) at its outer end, and a second integrally formed shaft (2) which fits in the socket in the spindle of the machine tool. Cutting fluid is directed on to the workpiece from an outlet (6) in the shaft (3) near the cutting insert (4). This outlet is connected by a longitudinal hole (8) in the shaft (3) to an inlet (7) in the rear face of the tool body (1). USE/ADVANTAGE - Tool for use in a machine tool which incorporates means to direct cutting fluid on to the workpiece.

Cutting method by high-pressure coolant

Abstract: PURPOSE: To reduce damage to a tool by discharging liquid coolant with a pressure higher than 690 kPa to the vicinity of an edge point inside a groove in a cutting method for cutting an undercut groove CONSTITUTION: A tool bit 20 provided with a cuttable arc type cutting edge 32 is installed inside a clamp 30 with a tube 34, through which cutting fluid to be discharged from an outlet 38 is linearly discharged As the width of a shank part 40 is narrower than that of a cutting edge part 41, an undercut groove 26 can be cut In this cutting process, coolant is directed in the Y-axis direction of a tool at a high pressure of 690 kPa or more so as to apply direct impact onto chips during plunge cutting In cutting in the Z-axis direction, chips are shredded by impact due to the shape and volume of the groove and a coolant pressure of 690 kPa or more Because the coolant is discharged at a high pressure, continuously connected chips are shredded, and congestion of the groove inside due to the chips can be prevented, so that damage such as abrasion to a cutting tool can be greatly reduced and a life of the tool can be increased

Influence of cutting fluids on surface finish of holes drilled into aluminium 390

Abstract: The primary objective of this research was to compare the surface finish resulting when using a semi-synthetic cutting fluid to that of a premium soluble oil. The secondary objective was to determine the effects of drill diameter, cutting speed, and fluid concentration on surface finish. The surface measurements were made on the walls of 6.350 and 9.525 mm lind holes drilled 25.4 mm into aluminium 390. Each cutting fluid was introduced using a flood application. Additional factors in the experimental design for each cutting fluid included two levels of cutting speed and two levels of fluid concentration. Variations in drill diameter, cutting speed, and the interaction between these factors were significant with respect to surface finish for both the semi-synthetic fluid and the soluble oil. Fluid concentration for the semi-synthetic fluid also had a significant effect on the surface finish. The surface finish produced while using the semi-synthetic fluid was approximately the same as that with the soluble oil.

Precise groove processing method

Abstract: PURPOSE:To continuously cut a groove having the same depth almost free from an error and to markedly enhance the capacity of a product by cutting a plurality of grooves having a required depth at a required interval by a blade not absorbing a cutting fluid and showing no change in its diameter. CONSTITUTION:An object 11 to be processed is held to a predetermined holding means 12 and a disc-shaped blade 14 cutting the surface of the object 11 to be processed to form grooves 13 is mounted to a drive shaft 15 and a cutting fluid supply means 15 for supplying a cutting fluid to a region to be cut is mounted. By allowing the blade 14 to act on the object to be processed, the grooves 13 are cut continuously and successively. The blade 14 to be used is formed from a so called metal bond grindstone obtained by mixing diamond grinding particles with a metal powder composed of nickel or copper and baking the resulting mixture and has no hygroscopicity as a whole and absorbs no cutting fluid and the particle size of the diamond grinding particles in the grindstone is pref. set to 2-4mum or less. Therefore, even when cutting is performed while the cutting fluid is supplied over a long time, the expansion of the blade is not generated at all and the grooves having the same depth can be continuously cut.