JP2001150130A - Thread solder grooving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thread solder grooving device having versertility, small in size, low in cost and usable for an automatic machine such as a robot, by unnecessitating components exclusive for grooving various thread solders and auxiliary components to guide the grooving. SOLUTION: A distance between a cutting edge of a rotary blade 1 and a centering taper part 6 of a grooving rotary roller 2 is made variable, a guide taper 9 is provide on the extension of the centering taper, the centering taper 6 is subjected to surface treatment slide prevention. Further, an elastic spacer 15 capable of adjusting a cutting edge position of the rotary blade 1 is assembled therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread solder grooving apparatus for continuously grooving flux-cored thread solder.

[0002]

2. Description of the Related Art When soldering is performed using a flux-cored yarn solder, the molten solder is scattered as small particles at the same time as the flux, and adheres around the soldered portion. In particular, the higher the melting point, the greater the tendency. In recent years, lead-less solders are often used and have a high melting point. Therefore, it is known that in order to prevent the scattering of the solder, it is effective to form a thin groove which reaches the flux in the thread solder. Further, if the flux is opened immediately before the soldering operation, the deterioration of the flux with time can be prevented.
For reference, see Utility Model Publication Number;
363.

[0003]

As lead-less soldering increases due to environmental problems, there is a need for a small, inexpensive and versatile tool for using grooved thread solder which does not cause solder scattering during work.

[0004]

SUMMARY OF THE INVENTION According to the present invention, when grooving thread solder having various diameters and solder having characteristics, various kinds of grooved rotary rollers which are in contact with a rotary blade for grooving are provided. A device that is versatile for various types of thread solder by making the distance between the rotating roller with a fixed groove and the rotating blade tip variable without having a special shape that matches the thread solder. With the goal.

Further, in addition to the tapered shape for grooving the center of the cross section of the thread solder on the grooving rotary roller, a guide portion independent of the grooving rotary roller from the thread solder reel is provided on the extension of the taper. The purpose is to provide a taper having a guiding function even though the guiding mechanism is omitted, thereby reducing the number of components and the like.

When performing automatic soldering using a robot or the like, it is necessary to separate the last molten portion of the thread solder supplied to the soldering portion from the unmelted portion. In that case, in order to pull back the thread solder in the direction opposite to the supply direction, knurls, protrusions, recesses, and the like are provided on the surface of the tapered portion for centering the grooved roller, so that the thread solder once grooved can be removed. The purpose is to prevent slipping on the tapered surface.

When grooving the center of the cross section of the thread solder,
Since it is desirable that the groove shape of the cross section of the thread solder is radially cut at the center of the cross section, the object is to accurately position the cutting edge of the rotary blade.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention. Reference numerals 3 and 5 denote cross sections of the thread solder, which indicate the difference in size. 3 indicates a case where the diameter is large and 5 indicates a case where the diameter is small. Rotary blade 1
This cuts into the positions of the thread solders 3 or 5 and the fluxes 4. The distance between the cores of 3 and 5 is X1, X
Reference numeral 2 denotes a cutting depth up to the center of the cross section of the thread solder. By varying the distance of X3 depending on the size of the cross section of the thread solder or the characteristics of the solder, the cutting depth of X2 can be adjusted. Also,
The taper 6 has a function of centering the cross section of the thread solder of the rotary roller with grooves. FIG. 2 shows that the distance X3 can be varied by attaching the shaft 7 having an eccentric amount of the distance X4 to the grooved rotary roller 2. By forming the grooved rotary roller 2 with a taper 9 for guiding on the extension of the taper 6, the thread solder 3, (5) guided from the thread solder reel 10 can be easily placed in any position, up, down, left and right. FIG. 3 and FIG. 4 show the supply to the rotary roller with grooves. 5 Rotating roller 6 with groove
Knurled 11 in the tapered part for centering
Is shown on the tapered surface. The grooved shapes of the thread solders 3 and (5) shown in FIG. 6 are desirably FIG. 6- (A), and not possible in FIGS. 6- (B) and (C). In order to obtain the shape of (a), the components need to have high processing accuracy, and the cost is high. In view of this, the screw 13 is provided on the rotary shaft constituting the rotary blade shown in FIG. 7 so that the position of the rotary blade can be adjusted, and the elastic spacer 15 is displaced by turning the nut 14.

[0009]

In this way, a compact, inexpensive and versatile thread solder grooving device with few components can be realized, and it is low-cost and easily scatters solder balls. Can work.

[Brief description of the drawings]

FIG. 1 is a side view of a rotary blade and a grooved rotary roller.

FIG. 2 is a sectional view of a grooved rotary roller.

FIG. 3 is a plan view of a thread solder reel, a grooved rotary roller, and a rotary blade.

FIG. 4 is a side view of a thread solder reel and a grooved rotary roller.

FIG. 5 is a side view of a grooved rotary roller having a tapered surface.

FIGS. 6A and 6B are cross-sectional views of a non-defective product, and FIGS.

FIG. 7 is a sectional view of a thread solder, a rotary blade, and an elastic spacer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotary blade 2 grooved roller 3 large-diameter thread solder 4 flux 5 small-diameter thread solder 6 centering taper 7 eccentric shaft 8 eccentric shaft base 9 guide taper 10 thread solder reel 11 centering taper surface treatment 12 rotating shaft 13 screw part 14 nut 15 Elastic spacer

Claims (4)

[Claims] 1. A rotary blade for grooving thread solder before grooving supplied from a thread solder reel, and a tapered shape for centering a grooving position at a center portion of a cross section of the thread solder in contact with the rotary blade. A thread solder grooving device in a grooved rotary roller, in which the amount of cut into the center of the thread solder by the cutting edge of the rotary blade can be varied. 2. A tapered portion having a guide function for introducing thread solder before grooving supplied from a thread solder reel on an extension of a taper for centering a grooving position of the grooved rotary roller. A thread solder grooving device using a rotating roller with grooves. 3. A surface shape for giving a contact resistance to the thread solder is formed in a tapered portion of the grooved rotary roller for centering contact with the thread solder. 4. A thread solder grooving device incorporating an elastic spacer for adjusting the position of a blade edge so that a grooving shape is radially cut into a center portion of a thread solder cross section.