JP2008260123A - Recycling manufacturing method of fitting type microscopic bit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recycling manufacturing method of a fitting type microscopic bit for making use of a worn-out fitting type microscopic bit without discarding it. <P>SOLUTION: The fitting type microscopic bit worn out up to a predetermined degree is taken up in a step (a). A first bit part of the bit is removed in a following step (b). An outer diameter of a shank and an outer diameter of a connecting part of the bit are respectively polished or cut up to outer diametrical dimensions of a predetermined degree. For example, an original diameter 3.175 mm of the shank is cut down to 2.0 mm, and the connecting part is cut down to a diameter 1.0 mm. A second bit part is formed on the connecting part in a following step (d). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for recycle manufacturing embedded microbits.

  A microbit usually used for punching a printed circuit board has a bit portion and a shank portion integrally formed with the bit portion, and the shank portion is held by a punching machine. A micro-drilling operation of the printed circuit board is performed by a bit portion in which a small number of bits and the same number of waste grooves are formed on the outer periphery.

  By the way, the difference between the outer diameter dimension of the shank part and the outer diameter dimension of the bit part is considerably large. Generally, the outer diameter of the shank is several times larger than the outer diameter of the bit. Therefore, when manufacturing the said micro bit by the method of integral molding, it is necessary to cut a large amount of the outer periphery of a bit part, and it can finally meet the request | requirement of a fine dimension by cutting a bit part in large quantities. However, such a method inevitably results in a waste of a large amount of material resources, which is not preferable not only in terms of cost but also environmental considerations.

In order to solve such a problem, there is a “fit-in microbit” proposed by the present inventor (see Patent Document 1). This is a method of fitting a bit having a small diameter into a fitting groove of a shank portion having a large diameter, and a method of combining the bit and the shank after designing and manufacturing them with appropriate outer diameter dimensions. This can reduce material waste.
Taiwan Patent No. M308805 Specification

  However, this embedded microbit is usually worn and damaged to a considerable extent by using 10,000 drillings. Therefore, disposal is necessary. Therefore, even if the amount of cutting at the time of manufacture is reduced, after all, material resources are wasted. This is a serious problem in the era of rising raw material prices.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method for recycling and manufacturing a built-in microbit, so that a worn built-in microbit is used without being discarded. Make it possible.

  The method according to claim 1 is attached to the shank formed with the axial insertion groove, the first bit portion used for drilling, and the first bit portion coaxially, and the base end thereof is attached to the insertion groove. A method of recycling a fit-in microbit comprising: a bit having a connecting portion fixed by insertion; a step (a) of taking out the fit-in microbit, and a step (b) of removing the first bit portion Cutting the outer diameter of the shank and the connecting portion to a certain size (c), and a second bit portion used for drilling, having a cutting tool and a cutting groove serving as a cutting space when drilling. Forming a second bit in the connection part (d).

  The method of claim 2 is the recycling method of the embedded microbit according to claim 1, wherein the embedded microbit of the step (a) has reached a disposal standard after performing about 10,000 drilling operations. It has a bit part.

  According to a third aspect of the present invention, in the method for manufacturing a fitting type microbit according to the first aspect, in the step (d), the connecting portion is taken out at a portion outside the fitting groove, and the second bit portion is removed. It is characterized by forming.

  In addition, this technical thought can also be shown as the following structures. That is, the recycle manufacturing method of the embedded microbit provided by the present invention includes the following steps. Step (a): Taking the inset microbit, the inset microbit has a shank and a bit, an axial inset groove is formed at the end of the shank, and the bit is a first bit of a coaxial integrated connection. And the connection portion is firmly inserted into the fitting groove at the end thereof, and the first bit portion is worn to some extent. Step (b): The first bit part is removed. Step (c): Cutting the outer diameter of the shank and the connecting part to some extent. Step (d): forming a second bit portion at the connecting portion of the fitting groove that has gone out, and the second bit portion has a slight bite and a waste groove, and the bit cuts the circuit board. The waste groove is used as a waste space when drilling.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The explanation here is also for facilitating the examiner to understand the features and characteristics of the present invention.

  FIGS. 1-5 illustrate a suitable inset microbit recycle manufacturing method of the present invention.

  In step a, an inset microbit that has been worn to a predetermined extent is taken. Referring to FIG. 2, the embedded microbit 10 has a bit 11 and a shank 12. The end of the shank 12 has a fitting groove having a certain depth and width in the axial direction. The bit 11 includes a first bit portion 111 and a connecting portion 112, and the first bit portion 111 and the connecting portion 112 are a coaxial casing formed integrally. The base end side of the connecting part 112 is inserted and fixed in the fitting groove 121. With this configuration, the bit 11 and the shank 12 are connected coaxially. The first bit portion 111 is formed with a slight bite and a waste groove, thereby enabling fine drilling of the printed circuit board and waste during drilling. For example, in the first bit portion 111, a spiral groove is formed as a waste groove, so that waste can be scraped along the groove when drilling. The shank 12 is held in a drilling machine. The first bit portion 111 of the bit 11 has reached the wear disposal standard (perforation about 10,000 times).

  In the subsequent step b, the first bit part 111 of the bit 11 is removed. Here, as shown in FIG. 3, the worn first bit portion 111 is removed using a cutting tool or using a grinding wheel polishing method.

  In the next step c, the outer diameter of the shank 12 and the outer diameter of the connecting portion 112 of the bit 11 are each ground or cut to a certain degree of outer diameter. As shown in FIG. 4, in this embodiment, the original diameter of 3.175 mm of the shank 12 is cut to 2.0 mm, and the connecting portion 112 is cut to a diameter of 1.0 mm.

  In subsequent step d, the second bit portion 113 is formed in the connecting portion 112. As shown in FIG. 5, the second bit portion 113 is formed on the distal end side of the connecting portion 112. For example, on the assumption that the base end portion of the first bit portion 111 is covered with the connecting portion 112, the base end portion is exposed by cutting the base end side, and this is exposed. Is the second bit portion 113. The 2nd bit part 113 has a some bite and a waste groove, and the waste space at the time of drilling is formed in a waste groove by performing a drilling operation | work with the said bit.

  As described above, the worn-out first bit portion 111 is removed from the conventional embedded microbit that is discarded when the wear standard is reached, and the shank 12 and the connecting portion 112 are newly provided with a certain outer diameter (from the original). To a small outer diameter), a second bit portion having a new bite and a waste groove is newly formed in the connecting portion 112. Accordingly, the embedded microbit that should be discarded can be processed relatively easily, and the small-diameter embedded microbit can be manufactured and used. As a result, it contributes to environmental protection and can reduce the manufacturing cost.

It is a flowchart which shows the recycling method of one Embodiment of this invention. It is explanatory drawing which shows the structure of the insertion type | formula microbit of one Embodiment of this invention. FIG. 3 is an explanatory diagram showing a state where the first bit part is removed in one embodiment of the present invention. In one Embodiment of this invention, it is explanatory drawing which shows a mode that it cut to the fixed dimension of the outer diameter of a shank and a connection part. In one Embodiment of this invention, it is explanatory drawing which shows a mode that the 2nd bit part was formed in the connection part.

Explanation of symbols

  10: Fit-in type micro bit, bits 11, 111: first bit part, 112: connecting part, 113: second bit part, 12: shank, 121: fitting groove

Claims (3)

A shank formed with an axial insertion groove, a first bit portion used for drilling, and a connecting portion which is coaxially attached to the first bit portion and whose base end is inserted and fixed in the insertion groove. A method for recycling a built-in microbit equipped with a bit,
Removing said telescoping microbit (a);
Removing the first bit portion (b);
Cutting the outer diameter of the shank and the connecting portion to a certain dimension (c);
A step (d) of forming a second bit portion used for drilling in the connecting portion, the second bit having a cutting tool and a waste groove serving as a waste space at the time of drilling;
A method for recycling and manufacturing embedded microbits. In the manufacturing method of the embedded microbit according to claim 1,
The embedded microbit of the step (a) has a bit portion that has been subjected to a drilling operation about 10,000 times and has reached a disposal standard, and is a method for recycling manufacturing of the embedded microbit. In the manufacturing method of the embedded microbit according to claim 1,
In the step (d), the connecting portion is formed outside the fitting groove, and the second bit portion is formed to form the fitting type microbit recycling manufacturing method.

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