Gear shaping

About: Gear shaping is a research topic. Over the lifetime, 598 publications have been published within this topic receiving 1880 citations.

Grinding method for clearance-groove-free double-helical gear

Abstract: The invention discloses a grinding method for a clearance-groove-free double-helical gear. After gear shaping machining, the middle portion of the clearance-groove-free double-helical gear is subjected to plating layer anti-carburizing heat treatment protection, after heat treatment, a protective plating layer is removed through a chemical method, and then, grinding is conducted through a saucer-shaped grinding wheel. Due to the fact that the middle portion of the double-helical gear is not subjected to carburization strengthening, the gear face of the middle portion of the double-helical gearcan be cut off through a common milling method, and thus, the middle portion does not take part in engagement but has the effects of being connected with the gear faces on the two sides and improvingstrength. Through the grinding method, grinding of the clearance-groove-free double-helical gear is achieved, and the strength of the clearance-groove-free double-helical gear is improved compared with a clearance groove type double-helical gear.

Multi-gear gear-shaping fast locating tool

Abstract: The utility model discloses a multi-gear gear-shaping fast locating tool which comprises a sliding base, a locating rod arranged on the sliding base and a locating clamp used for fixing multiple gears on a slotting machine workbench. An opening corresponding to the shape of gear teeth is formed in one end of the locating rod, and a protrusion capable of being inserted into a tooth groove is arranged at the other end of the locating rod. When the multi-gear gear-shaping fast locating tool is used, a workpiece is firstly fixed when a first part is machined, the end, with the opening, of the locating rod is made to be clamped on the gear teeth with the tooth shapes, the end, with the protrusion, of the locating rod is inserted into the tooth groove of a slotting cutter, after the precise meshing angle between the slotting cutter and the gears with the tooth shapes is automatically achieved through the locating of the locating rod, the slotting cutter is fixed, the slotting cutter and the teeth machined on the parts are made to build one-to-one corresponding relations, and when subsequent parts are machined, the locating rod is simply used for locating the parts when the parts are fixed. The locating tool has the advantages of being high in locating precision, convenient to operate, suitable for batch production and the like.

Gear shaper working method and gear shaper

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.

Gear-shaping grindstone and method of fabricating the same

Abstract: A highly accurate, long-life grindstone for shaping a gear and a method of fabricating the grindstone, without depending on the accuracy of form of a base metal and without using a special grinding machine or a special lapping machine, are disclosed. A super-abrasive layer (29) of a predetermined thickness is fixedly attached on the outer periphery of a body portion (24) of the base metal (23) formed in a cylinder solid. The super-abrasive layer (29) is metal-bonded, and has the outer periphery thereof formed with a toothed portion (31) in the shape of the teeth of an external gear by electric discharge machining.