Metal working – Plural diverse manufacturing apparatus including means for... – Including composite tool
Patent
1981-10-19
1984-08-07
Bilinsky, Z. R.
Metal working
Plural diverse manufacturing apparatus including means for...
Including composite tool
29558, B23P 1300, B24B 3308
Patent
active
044634900
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
This invention relates to a machine and a method for effecting both boring and honing with the same tool head.
BACKGROUND OF THE ART
The cylinder bore of an engine is finished by honing with grindstones after boring with cutters. The boring and honing for forming the inner peripheral surface of a work bore such as the cylinder bore has heretofore been performed in separate steps with separate tool heads mounted on separate shafts. Consequently, it is difficult to shorten the working time and to improve the working efficiency, and a great deal of machinery and devices must be provided.
Honing is performed by rotating and axially reciprocating a tool head provided with grindstones. But according to the conventional honing operation, the tool head which is reciprocated by a reciprocating mechanism is maintained in a floating state by means of a universal joint, and by this floating action the grindstones are permitted to follow the inner peripheral surface of a work bore to effect honing. Therefore, an attainable machining speed is inevitably limited, and it has thus been impossible to effect honing at high speeds and with high efficiency.
DISCLOSURE OF THE INVENTION
The present invention effectively overcomes the above-mentioned problems associated with the prior art.
It is an object of the present invention to provide a combined boring and honing machine and a method of effecting the combined machining wherein a single tool head is used in common to perform both boring and honing operations, thereby shortening the working time, improving the working efficiency and reducing the number of machinery and devices. The structure of the parts for the honing operation is made rigid enough to allow honing to be performed in a rigid state, thereby attaining a high speed and high efficiency machining.
In order to achieve the above object, this invention is characterized in that boring tools and honing stones are coaxially arranged on a tool head; a bar member is reciprocatingly inserted through a spline coupling into a hollow spindle which is rotated by drive means; an end opening surface of the spindle and an end of the bar member are tapered for engagement with each other so that the bar member may be disengaged and moved forwardly with respect to the spindle; and the aforesaid tool head is coupled with the end surface of the bar member exposed from the end opening surface of the spindle.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view of a combined machining apparatus according to this invention, with main portions in cross section.
FIG. 2 is a partially enlarged view of FIG. 1, showing the tool head portion in detail.
BEST FORM FOR WORKING THE INVENTION
The basic structure of a composite machine according to the invention is shown in FIG. 1. A slide base 2 is fixed onto a base 1, and on the slide base 2 there is slidably mounted a spindle case 3 which is moved forwardly and backwardly by a feed cylinder 4. Within the spindle case 3 there is rotatably mounted a hollow cylindrical spindle 5 through bearings 6, and a pulley 8 is mounted with a key 7 on a rear portion of the spindle 5 which projects from the case 3. A belt 8a connected to drive means such as a motor is entrained about the pulley 8, and the spindle 5 is rotated by the drive means. A bar member 9 which serves as a honing bar is inserted within the spindle 5 while the inner peripheral surface of the spindle 5 and the outer peripheral surface of the bar member 9 are each provided with splines to define a coupling 10, and by this spline coupling at 10, the bar member 9 is constructed to be slidable forwardly and backwardly with respect to the spindle 5 and rotatable together with the spindle 5.
The end opening surface of the spindle 5 is formed into a forwardly divergent, tapered surface 5a, and the end of the bar member 9 is also formed to have a forwardly divergent or tapered shank portion 9a corresponding to the tapered surface 5a. The tapered surface 5a and the forwardly divergent portion 9a are taper engaged when
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Arai Isao
Hashimoto Hitoshi
Saito Yoshikuni
Wada Minoru
Bilinsky Z. R.
Burt Pamela S.
Cupoli Anthony L.
Honda Giken Kogyo Kabushiki Kaisha
Weiner Irving M.
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