US 3,982,356 AGranted

Honing machine for finishing trochoidal bore of rotor housing of rotary engine

AssigneeToyo Kogyo Co., Ltd.

InventorsSatoshi Dojyo, Tsutomu Yoshino

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Abstract

A honing machine for finishing a trochoidal bore of a rotor housing of a rotary engine. The honing machine includes a honing head and a machine table both of which are driven by a common drive shaft separately from each other in the same direction but with an eccentricity from each other. The eccentricity is adjustable so as to make the honing head follow smoothly and finely the trochoidal inner surface. A clearance control device is also provided in the honing machine, which controls the clearance between the gears intermeshing with each other for transmitting rotation from the drive shaft to the honing head and machine table. A bias pressure control mechanism is also provided which can control the bias pressure of the honing elements of the head against the trochoidal inner periphery in response to the angular positions of the elements relative to the inner periphery. The honing machine may also include a damping device to pneumatically damp or absorb such a shock, if any, as is experienced at the contact interface between the inner periphery and the honing elements.

Claims6

Dependent claims

A honing machine for finishing a trochoidal bore of a workpiece by honing the inner wall surface thereof having an opening portion, comprising:

a. a honing head provided on its periphery with a honing stone which is biased outwardly into sliding contact with the inner wall surface of the workpiece for honing the same when rotatably received within the trochoidal bore,
b. a honing head shaft coaxially secured to said honing head,
c. means for rotating the honing head shaft,
d. a machine table for holding the workpiece in position,
e. means for controlling the position of the honing head and the machine table to draw a preset trochoid curve,
f. detecting means for detecting when the honing stone is on the opening portion,
g. bias-pressure control means for controlling the bias pressure of said honing stone toward said inner wall surface,
h. a pressurized fluid source communicating with said bias pressure control means for supplying thereto a liquid under pressure, and
i. honing control means hydraulically connected to said pressurized fluid source and responsive to said detecting means for decreasing the bias pressure of said honing stone toward said inner wall surface when said honing stone is on the opening portion of the inner wall surface.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/508,901Filed 24 Sep 1974 · continuation
Priority: 27 Dec 1972
Granted: 28 Sep 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B24B 33/02
Honing machines or devices; Accessories therefor: designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
B24B 19/09
For grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section: for grinding trochoidal surfaces, e.g. in rotor…
Y10S 451/919
Abrading: wankel
B24B
Machines, devices, or processes for grinding or polishing