Equal-pitch groove processing device

Details Equal-pitch groove processing device Equal-pitch groove processing device

1990-06-15

1992-10-13

Bilinsky, Z. R.

Gear cutting, milling, or planing

Broaching

With control means energized in response to activator...

83672, 409259, 409268, 409275, B23D 3714

Patent

active

051545551

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

1. Technical Field
The present invention relates to an equal-pitch groove processing device for use in processing fins of a heat exchanger and the like.
2. Background Art
Fins of a heat exchanger, for instance, are fabricated by forming a multiplicity of grooves in an elongated material at equal pitches.
To form the aforementioned grooves, a method is used in which the aforementioned grooves are formed consecutively one by one by means of an NC milling machine having a thin-blade side cutter mounted thereon, or a method is used in which a plurality of grooves are formed at a time by using a multi-side cutter.
In the method for forming the grooves one by one by using a thin-blade side cutter, each time one groove is processed, it is necessary to relatively move the thin-blade side cutter and a workpiece by predetermined amounts after the thin-blade side cutter is returned to a cutting start position. For this reason, there is a drawback in that substantial time is required for processing one workpiece.
In addition, in the method using a multi-side cutter, although the time for processing a workpiece is shortened, since a multiplicity of cutters are required, there is a drawback in that an operation for managing the life of each cutter and an operation at the time of replacing the cutters become complicated.
In view of the above-described circumstances, an object of the present invention is to provide an equal-pitch groove processing device which is capable of processing equal-pitch grooves efficiently by overcoming the above-described drawbacks.


DISCLOSURE OF THE INVENTION

An equal-pitch groove processing device in accordance with the present invention comprises: transferring means for continuously transferring a workpiece along an axial direction of the workpiece; a processing tool in which a cutting tooth of a thickness corresponding to a width of a groove to be processed is formed in an outer peripheral portion along a spiral path, and which is rotatively driven with a center of the spiral as an axis; and controlling means for synchronously operating the processing tool and the transferring means in such a manner that the workpiece is transferred by a one-normal-pitch portion of the spiral while the processing tool undergoes one revolution.
In accordance with this equal-pitch groove processing device, equal-pitch grooves are formed consecutively in the workpiece by means of one processing tool while the workpiece is being transferred continuously.
Accordingly, no substantial time is required in processing a workpiece, and a plurality of tools are not required, so that it is possible to process equal-pitch grooves efficiently.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a conceptual diagram illustrating an overall configuration of an equal-pitch processing device in accordance with the present invention;
FIG. 2 is a conceptual diagram of the aforementioned equal-pitch processing device as viewed from the top;
FIGS. 3(a) and 3(b) are a front elevational view and a side elevational view of the processing tool, respectively;
FIGS. 4, 5, and 6 are a perspective view, a top plan view, and a side elevational view illustrating positional relationships between the processing tool and a workpiece in accordance with another embodiment, respectively; and
FIGS. 7(a), 7(b), and 7(c) are a side elevational view of one side, a top plan view, and a side elevational view of the other side, illustrating the workpiece provided with groove processing, respectively.


BEST MODE FOR CARRYING OUT THE INVENTION

Referring now to the drawings, a description will be given of an embodiment of the present invention.
FIG. 1 conceptually shows an equal-pitch processing device 1 in accordance with the present invention.
In this equal-pitch processing device 1, a first transfer section 10, a first processing section 20, a second processing section 30, and a second transfer section 40 are disposed consecutively from the left, as viewed in the drawing, along a workpiece 100 extending in a longitudinal direction as viewe

REFERENCES:
patent: 2202428 (1940-05-01), Poock
patent: 3064506 (1962-11-01), Nihlen et al.
patent: 3504718 (1970-04-01), Pittman et al.
patent: 3630126 (1971-12-01), Ronai
patent: 3901114 (1975-08-01), Cage

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