Showing papers on "Gear shaping published in 1999"
TL;DR: In this article, a tool-life monitoring system for gear shaping that uses acoustic emission (AE) signals is presented, which is related to the cutting condition, tool material and tool geometry in the cutting of metals.
Abstract: Sensing techniques for monitoring machining processes have been one of the focuses of research on process automation. This paper presents the development of on-line tool-life monitoring system for gear shaping that uses acoustic emission (AE). Characteristics of the AE signals are related to the cutting condition, tool material and tool geometry in the cutting of metals. The relationship between AE signal and tool wear was investigated experimentally. Experiments were carried out on the gear shaping of SCM 420 material with a pinion cutter having 44 teeth. Root-mean-square (RMS) AE voltages increase regularly according to tool wear. It is suggested that the maximum value of RMS AE voltage is an effective parameter to monitor tool life. In this study, not only the acquisition method of AE signals for rotating objects but also the signal-processing technique were developed in order to realize the in-process monitoring system for gear shaping. The on-line tool-life monitoring system developed has been successfully applied to gear machining processes.
37 citations
Patent•
29 Mar 1999TL;DR: In this article, a method of shaping a bevel gear with high efficiency and at low cost was proposed, wherein, when an annular milling cutter comprising a high-speed steel tool blade material (23) attached to a main body (22) is used to create a wasvel gear, a blade material having at least one layer of coating film having a composition of substantially (Ti (1-x) A1x) (Ny C (1 -y)) (provided, 0.2 ≤X≤0.85, 0 2 ≤y≤
Abstract: A method of shaping a bevel gear with high efficiency and at low cost, wherein, when an annular milling cutter (21) comprising a high-speed steel tool blade material (23) attached to a main body (22) is used to create a bevel gear, a blade material (23) having at least one layer of coating film having a composition of substantially (Ti (1-x) A1x) (Ny C (1-y)) (provided, 0.2 ≤X≤0.85, 0.2 ≤y≤1.0) is used as the cutting material (23), dry cutting not using a cutting fluid for cutting is performed at cutting speeds of not lower then 20 m/min and not higher than 400 m/min, and a cutting speed is significantly improved without using an expensive cemented carbide tool.
17 citations
Patent•
23 Mar 1999
TL;DR: In this paper, a pinion cutter 4 is coated with a film of composition (TiL(1-x) Alx ) (Ny C(1y) ) (0.2<=x<=0.9, 0.2 <=y<=1.0).
Abstract: PROBLEM TO BE SOLVED: To remarkably improve cutting speed by coating a film of specific composition on the flank of a gear shaping tool, and working under a specific speed without using cutting fluid. SOLUTION: A pinion cutter 4 is coated with a film of composition (TiL(1-x) Alx ) (Ny C(1-y) ) (0.2<=x<=0.9, 0.2<=y<=1.0). Coating of the film is executed at least on the flank of the pinion cutter 4. In a gear shaper, generation of tooth profile is executed by reciprocating the pinion cutter 4 up and down to cut in a work 1, and giving relative rotational motion to the work 1 against the pinion cutter 4. Cutting is executed by dry cut without supplying cutting fluid. An abrasion loss increases as the cutting speed becomes higher, and hence the cutting speed is set to be under 300 m/min. Hereby, the cutting speed can be remarkably improved without using an expensive tool.
3 citations
Patent•
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02 Mar 1999
TL;DR: In this article, a pinion cutter having cutting edges on both surfaces on a cutter spindle of a gear shaper was installed to perform work even in either of reciprocating motion by installing the pinion cutters on both surface.
Abstract: PROBLEM TO BE SOLVED: To perform work even in either of reciprocating motion by installing a pinion cutter having cutting edges on both surfaces on a cutter spindle of a gear shaper. SOLUTION: A pinion cutter 23 having cutting edges on both surfaces is fixed to a main spindle 21 by a cutter pressing-down member 41. When a rotary disc 38 of a crank mechanism 37 is rotated, the main spindle 21 reciprocates in the vertical direction through a connecting lever 36 and a spherical surface bearing 35. Since this pinion cutter 23 has the cutting edges on both surfaces, when the main spindle 21 reciprocates in the verical direction, cutting work is performed on a gear raw material even when moving in either direction at going time and returning time. Thereby, there is no need to relieve it, and also no need to arrange a relieving mechanism in a gear shaper. Therefore, productivity is improved, the gear shaper is simplified, and rigidity of the gear shaper is improved.
1 citations
Patent•
29 Mar 1999
TL;DR: In this article, the main body of a bevel gear with an annular mill was mounted to a main body, at the time of forming the bevel gears, as the blade material was substantially increased.
Abstract: High efficiency, a method for realizing the processing of the bevel gear at a low cost, the blade member 23 of the force high-speed tool with an annular mill 21 is mounted to the main body 22, at the time of forming a bevel gear, as the blade material 23, substantially, (Ti