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Volume 28, Issue 331
Displaying 1-8 of 8 articles from this issue
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[in Japanese]1962 Volume 28 Issue 331 Pages 447-453
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1440K) -
[in Japanese], [in Japanese]1962 Volume 28 Issue 331 Pages 454-456
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (716K) -
Geometrical Characteristics of Planing ToolMasao NAKAZAKI1962 Volume 28 Issue 331 Pages 457-461
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIt can be proved that the mechanics of three-dimensional cutting operations is based on the cutting operations with the straight cutting edge which is wider than the workpiece. In this case there are two cases of planing and turning. The difference of both originates from only whether the motion of a tool is linear or circular.
The author analyses at first the geometrical characteristics of such a planing tool, and points out that the geometrical characteristics should be the basis of three-dimensional cutting operations by obtaining the general formula of the specific cutting force. And after treating upon the plange-cut turning, the results will be extended to the general case, namely the convensional cut with a tool having both side-cutting edge and end-cutting edge.
In tie Part 1 only the geometrical characteristics of the foregoing planing tool is treated.View full abstractDownload PDF (748K) -
Kinematics of Chip Formation on Tool-Chip Interface in PlaningMasao NAKAZAKI1962 Volume 28 Issue 331 Pages 462-467
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn orthogonal cutting, every chip produced by the planing tool having a straight cutting edge which is wider than the workpiece flows straightly along the direction normal to. the cutting edge on the tool face but in three-dimensional cutting the chip flow is curved on the tool chip interface of a oblique tool because of the side-sliding of chip depending on the geometrical characteristics of its three-dimensional tool face.
Here the author deals with the kinematics of a chip on the tool-chip interface in planing showing the theoretical formula of chip-flow direction.View full abstractDownload PDF (825K) -
Crack-type CuttingAkio KAMOGAWA1962 Volume 28 Issue 331 Pages 468-477
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn the case of the orthogonal cutting of plastics, effect of the cutting condition on the chip form and cutting resistance are shown as follow:
1. The chip form of Acrylic resin and Epoxy resin changes from the flow-type to the, crack-type, depending on cutting angle (θ), depth of cut (d), cutting speed (V).
2. The cutting resistance of Acrylic resin and nylon is almost constant under the following cutting condition: V; 480m/min, θ; 70 degree, d 0.02mm0.07mm.
3. In the crack-type chip, the cutting resistance decreases.
4. When Acrylic resin is cut at the speed of over 112m/min, crack-type chip is formed -under the condition of 20 degree rake angle and 0.07mm depth of cut.
5. The chips of Acrylic resin and nylon are always the flow-type form when the cutting angle is over 90 degree.View full abstractDownload PDF (2556K) -
Multi-Point-Collision Steady-State MotionNobukazu ISHIHARA1962 Volume 28 Issue 331 Pages 478-484
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn multi-point-collision steady-state motion the pallet and star wheel strike each other only once on each contact surface, and on more than two different contact surfaces successively during the advance of 'a single tooth of the star wheel. This type of motion is encountered w hen the moment-of-inertia of the pallet is very small as compared to that of the star wheel.
The purpose of this paper is to establish theoretically the pattern of this steady-state motion and to provide methods of evaluating the dynamical characteristics of the mechanism.
Both approximate and exact methods are presented, and linear simultaneous difference equations are applied to handle problems of this type mathematically.View full abstractDownload PDF (1030K) -
Two-Point-Collision Steady-State MotionNobukazu ISHIHARA1962 Volume 28 Issue 331 Pages 485-491
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe two-point-collision steady-state motion has been well-known, and often considered to be the only possible form of steady-state motion relative to the pallet and star wheel mechanism.
Problems in this steady-state motion will lead to the solution of the quadratic equation, which is designated as the characteristic equation for two-point-collision steady state motion. In case the characteristic equation has a single positive root, this type of steadystate motion can exist. Various relationships as to the performance and characteristics of the mechanism have been derived assuming the existence of this pattern of steady-state motion.
Under a particular condition a motion is found in which intervals of time between collisions are identical. This is called the equiperiodic motion for which the relationships above stated can be simplified and expressed directly in terms of the geometrical and physical parameters, helping conceive a general idea concerning the effect of these parameters on the performance characteristics of the mechanism.View full abstractDownload PDF (974K) -
1962 Volume 28 Issue 331 Pages 493-496
Published: August 05, 1962
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (739K)
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