JPH08294891A - Suction attachment nozzle, its manufacture, and cutter - Google Patents

Abstract

PURPOSE: To provide a suction nozzle which involves lesser air resistance and has less likelihood of sticking of any foreign matter, for example dust or rubbish. CONSTITUTION: A through hole 5 in a nozzle tip 4 is given a bore in a smooth conical form by shaving the inner surface with a cutter having a crescent section. Accordingly the air resistance is small, the component attracting force is large, and sticking of foreign matter is unlikely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction nozzle for sucking a component in a vacuum used for mounting a chip component on a printed wiring board, a method for manufacturing the suction nozzle, and a cutter suitable for manufacturing the suction nozzle. .

[0002]

2. Description of the Related Art A chip component suction nozzle normally used in a chip component mounting machine for mounting a chip component on a printed wiring board has a structure as shown in FIG. The adsorption nozzle 1 of FIG. 5 (a) is made of a hardened metal such as stainless steel and has a vacuum hose connecting portion 2 at one end, a collar portion 3 at the center, and a nozzle tip 4 at the other end. A through hole 5 is provided through the hole. The diameter of the most distal end portion is required to be a size that does not exceed the outer dimensions of the chip component 6 to be adsorbed. In order to correspond to a particularly small chip component, the nozzle tip 4 has a conical shape that gradually becomes thinner from the vicinity of the root toward the tip.

However, in this conventional suction nozzle 1,
The through hole 5 for sucking into the vacuum is shown in FIG.
As shown in (b), the structure is such that cylindrical holes having different diameters are connected. This is because several drills with different thicknesses are used as a method for making holes.
Therefore, the step 7 is generated at the joint between the holes. Through hole 5
If there is such a step 7, the resistance to the flow of air for suction becomes remarkable and the suction force is impaired.
Further, dust due to suction is easily caught on the step 7, and it is necessary to frequently clean the nozzle.

[0004]

Therefore, an object of the present invention is to improve the structure of such an adsorption nozzle to provide an adsorption nozzle with less air resistance, to provide a method for manufacturing the improved adsorption nozzle, and to provide an adsorption method. It is to provide a cutter suitable for use in manufacturing a nozzle.

[0005]

A suction nozzle according to claim 1 of the present invention comprises a vacuum hose connecting portion, a tapered nozzle tip and a through hole penetrating the center thereof, and the through hole is formed into a smooth conical shape. It was made into the composition.

In the suction nozzle according to claim 2 of the present invention, the thickness of the root portion is made thicker than that of the tip portion.

In the suction nozzle according to claim 3 of the present invention, the thickness of the tip portion is made thicker than that of the root portion.

A suction nozzle according to a fourth aspect of the present invention has a structure in which the suction nozzle according to the first aspect is characterized in that a cylindrical hole is provided at a tip portion thereof.

In the method of manufacturing the suction nozzle according to the fifth aspect of the present invention, a plurality of continuous cylindrical through holes 5 each having a gradually decreasing diameter are formed by using a plurality of drill bits each having a successively decreasing diameter. It was composed of a step and a step of removing the step of the suction nozzle of the semi-finished product obtained after this step.

A cutter according to claim 6 of the present invention is composed of a base portion having one end having a columnar shape, a first blade portion having a half-moon-shaped cross section connected to the base portion, and a second blade portion connected thereto.

The cutter according to claim 7 of the present invention is the first
7. The cutter according to claim 6, wherein the blade portion and the second blade portion have a half-moon shape in cross section, and the second blade portion is tapered gradually toward the tip.

[0012]

In the suction nozzle according to the first aspect of the present invention, since the through hole is smooth, it is possible to obtain the suction nozzle having less air resistance and less catching of dust.

In the suction nozzle according to the second aspect of the present invention, since the thickness of the root portion is thicker than that of the tip portion, the mechanical strength can be secured when the nozzle has an extremely fine tip.

In the suction nozzle according to the third aspect of the present invention, since the thickness of the tip portion is made thicker than the root portion, damage to the tip of the nozzle due to impact at the time of picking up components can be prevented.

Since the suction nozzle according to the fourth aspect of the present invention has the cylindrical hole at the tip thereof, the air flow during suction can be made smooth.

In the method of manufacturing the suction nozzle according to the fifth aspect of the present invention, since the step of the suction nozzle is shaved, it is possible to perform processing suitable for mass production with less processing time and processing cost.

According to the cutters according to claims 6 and 7 of the present invention, the method of manufacturing the suction nozzle described in claim 5 can be implemented.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a suction nozzle according to the present invention and its operation, the steps and operations of its manufacturing method, and the structure of a cutter used in its manufacturing method and its operation will be described below with reference to FIGS. .

Embodiment 1 FIG. 1 is a side sectional view of a suction nozzle 1 according to the present invention, which is provided with a vacuum hose connecting portion 2 at one end, a collar portion 3 at the center, and a tapered nozzle tip 4 at the other end. Through hole 5 through the center of
Is provided. In particular, the through hole 5 has a conical shape similar to the conical shape having no step.

As described above, the smooth through hole 5 having no step has a small air resistance, the flow of air passing therethrough is smooth, the vacuum suction force can be increased, and dust is not accumulated on the step.

Embodiment 2 FIG. 2 is a side sectional view showing another embodiment of the suction nozzle according to the present invention. FIG. 2 (a) shows a suction nozzle 1 in which the root portion 8 is thicker than the tip portion 9. Particularly, in the case of a suction nozzle for a chip component having a very small size, the diameter of the tip becomes extremely thin and the wall thickness becomes thin accordingly, and the strength cannot be maintained. Therefore, the root portion 8 is thickened to secure the strength.

In the third embodiment (b), the suction nozzle 1 in which the thickness of the tip portion 9 is made thicker than the thickness of the root portion 8 prevents the tip portion 9 of the suction portion from being damaged by the impact when the component is sucked. effective.

In Example 4 (c), the suction nozzle 1 has a cylindrical hole 10 at the tip portion 9, and the air flow is made smooth.

Example 5 FIG. 3 shows a cutter used for manufacturing the suction nozzle of the present invention, (a) is a plan view thereof, (b) is a side view thereof.
(C) is an AA sectional view of the figure (b). Cutter 11
Is a column-shaped first trunk portion 12, a second trunk portion 13 connected to the first trunk portion 12 and having a smaller diameter than that, and a second trunk portion 1
The first blade portion 14 has a half-moon-shaped cross section and is connected to the second blade portion 15.

Both the first blade portion 14 and the second blade portion 15 have a half-moon shape in cross section as shown in FIG. 7C, and the second blade portion 15 is tapered gradually toward the tip.

Example 6 FIG. 4 shows a method for manufacturing the suction nozzle of the present invention,
(A) is a side view of a step of forming a through hole 5 in the suction nozzle 1, where a semi-finished product of the suction nozzle having no through hole is attached to a lathe, and a drill bit 16a is fed from there to A large-scale drilling process is performed in one step, and a second drilling process is performed by exchanging the drill bit 16b having a smaller diameter and sending the drill bit 16b. In this case, by using six drill bits whose diameters are successively reduced, six continuous cylindrical through holes 5 whose diameters are successively reduced can be opened.

(B) is a side view of the step of cutting the step of the through hole 5 having the step 7 of the suction nozzle of the semi-finished product obtained after the processing step of (a). The suction nozzle 1 is attached to a lathe and rotated. When the cutter 11 is fed into the through hole 5 from the left,
The inner surface of the through hole 5 contacts the first blade portion and the second blade portion of the cutter 11, and each step 7 is scraped off at the corner of the half-moon shaped portion of each blade portion.

Thus, the through hole 5 becomes a smooth hole having no step as shown in FIG. 3C, and an adsorption nozzle having a low air resistance can be obtained. Then, the hardness can be increased by quenching.

As another method for forming a smooth conical hole having no step as described above in the workpiece, there is a method by electric discharge machining, but it requires a long machining time and machining man-hours and is not suitable for mass production. is there. According to the method of manufacturing the suction nozzle of the present invention, it is possible to realize a reduction in processing time and a significant reduction in processing cost. Moreover, since the device used for processing is an ordinary lathe, no special skill is required.

[0030]

As is apparent from the above description, the suction nozzle according to the present invention has a low air resistance, a high suction force, and a small amount of dust. According to the method of manufacturing the suction nozzle according to the present invention, it is possible to carry out processing with less processing time and processing cost. Further, the cutter of the present invention is suitable for use in manufacturing the suction nozzle of the present invention.

[Brief description of drawings]

FIG. 1 is a side sectional view of a suction nozzle according to a first embodiment of the present invention.

FIG. 2 is a side cross-sectional view of a suction nozzle according to a second embodiment of the present invention, where (a) shows a case where the thickness of the nozzle tip is gradually reduced toward the tip portion, and (b) shows a thickness of the nozzle tip. Is gradually thickened toward the tip, and (c) is an example in which a cylindrical through hole is provided at the tip of the nozzle tip.

FIG. 3 is a cutter for processing through holes of the suction nozzle of the present invention, (a) is a plan view thereof, (b) is a side view thereof,
(C) is sectional drawing of the AA part of (b) side view.

FIG. 4 shows a method for manufacturing an adsorption nozzle of the present invention, (a)
Is a side view of the step of making a through hole in the suction nozzle, (b)
FIG. 4C is a side view of the step of cutting the step of the through hole, and FIG. 7C is a side sectional view of the suction nozzle after the processing step.

FIG. 5 shows a conventional suction nozzle, (a) is a perspective view,
(B) is a side sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adsorption nozzle 2 Vacuum hose connection part 3 Collar part 4 Nozzle tip 5 Through hole 6 Chip parts 7 Steps 8 Root part 9 Tip part 10 Cylindrical hole 11 Cutter 12 1st basic part 13 2nd basic part 14 1st blade part 15 2nd blade 16a, 16b Drill bit

Claims (7)

[Claims] 1. An adsorption nozzle comprising a vacuum hose connection portion, a tapered nozzle tip, and a through hole penetrating the center of the nozzle tip, the through hole having a smooth conical shape. 2. The suction nozzle according to claim 1, wherein the thickness of the root portion is larger than that of the tip portion. 3. The suction nozzle according to claim 1, wherein the thickness of the tip portion is larger than that of the root portion. 4. The suction nozzle according to claim 1, wherein a cylindrical hole is provided at the tip portion. 5. A step of forming a plurality of continuous cylindrical through holes 5 each having a diameter gradually decreasing by using a plurality of drill bits each having a diameter successively decreasing, and adsorption of a semi-finished product obtained after the step. A method for manufacturing an adsorption nozzle, comprising the step of shaving the step of the nozzle. 6. A cutter comprising a base portion having a columnar shape at one end, a first blade portion having a half-moon-shaped cross section connected to the base portion, and a second blade portion connected to the first blade portion. 7. The cutter according to claim 6, wherein the first blade portion and the second blade portion have a half-moon shape in cross section, and the second blade portion is tapered gradually toward the tip.