Machining equipment for production lines

Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting

Patent

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Details

29563, 198345, 1983461, 409158, 409174, B23Q 3904

Patent

active

046034560

DESCRIPTION:

BRIEF SUMMARY
FIELD OF ART

This invention relates to machining equipment for production lines and more particularly to machining equipment for production lines using a pallet type jig for holding a work which requires various angular machining operations for a bearing surface, such as the cylinder head of an internal combustion engine.


BACKGROUND ART

In the cylinder head of an internal combustion engine there usually are provided obliquely formed guide bores of intake and exhaust vlaves, and in the case of machining the cylinder head to make such angular bores, there have heretofore been manufactured cylinder head positioning jigs and guide bore forming machine tools especially suited for this purpose so as to have angles corresponding to the angles of guide bores in various types of internal combustion engines, because it is necessary to produce internal combustion engines in large quantities. Boring by cutting and other machining operations have been carried out for cylinder heads by using such manufactured jigs and machine tools. In automotive combustion engines, however, various types involving changes of the guide bore angle have recently been designed and manufactured because of diversification of demands, thus requiring an increased equipment cost. Particularly, in the case of conveyance pallet type jigs, there arises a problem with respect to space for storing the aforesaid jigs manufactured in large quantities because such type of jigs are relatively bulky. Besides, cylinder head positioning jigs must be machined to a high accuracy, and therefore it is very disadvantageous with respect to cost to manufacture new jigs for each new type of internal combustion engine. Under such circumstances, significant problems arise in attempting to manufacture a jig and a machine tool applicable to several types of internal combustion engines.


DISCLOSURE OF THE INVENTION

The present invention effectively overcomes the above-mentioned problems.
It is an object of the present invention to provide machining equipment in a production line having a plurality of pallet type jigs, a conveyance line capable of conveying the jigs, at least one work bench capable of receiving and delivering any one of the above jigs between it and the conveyance line, a spindle head positioned behind the work bench and capable of being fed back and forth and a control system for controlling the conveyance line, work bench and spindle head, whereby even for varying machining angles of works it is possible to effect machining using the same jig and work bench and thus versatility is provided for a plurality of different kinds of works, thereby making a common-use production and common use of work bench possible, and consequently the equipment cost can be reduced to a large extent.
It is another object of the present invention to provide machining equipment for production lines whereby in the aforementioned production line the carrying in and out of the jigs with respect to the work bench can be performed automatically and consequently the productivity can be improved.
In order to achieve the above-mentioned objects, the present invention provides machining equipment for a production line comprising a plurality of pallet type jigs, a conveyance line capable of conveying the jigs, at least one work bench capable of receiving and delivering any one of the jigs between it and the conveyance line, a spindle head positioned behind the work bench and capable of being fed back and forth and a control system for controlling the conveyance line, work bench and spindle head. The work bench having at least one horizontal rotary table capable of turning and indexing at a desired angle and having a constant turning position, and at least two holding rail members for holding any one of the jigs disengageably, the holding rail members being supported on the horizontal rotary table side by side in the vertical direction so as to be rotatable coaxially and integrally therewith and extending in the horizontal direction.
A preferred embodiment of the present inventio

REFERENCES:
patent: 2672675 (1954-03-01), Cross
patent: 2789683 (1957-04-01), Stahl
patent: 3010371 (1961-11-01), Riedel et al.
patent: 4050355 (1977-09-01), Niskanen
patent: 4309600 (1982-01-01), Perry et al.
patent: 4494282 (1985-01-01), Ida et al.

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