JPS6243735Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a quality discriminator for checking the wear and deformation state of the die of a compression tool used when compressing and connecting aluminum electric wires.

Background of the invention 10 in "Figure 1" is the frame of the compression tool, 12
is the die, and 14 is its fixed button.

"Figure 2" shows a cross section of a compression-connected electric wire,
16 is an electric wire, and 18 is a sleeve.

Conventionally, the wear and deformation degree of the die 12 was managed by
This was done by checking the width A of the sleeve 18 after compression using, for example, a check gauge.

In other words, if the width A is within a certain value,
Since the wear and deformation of the die 12 is small, it is determined that there is no need to replace it yet, and if the width A is larger than the predetermined value, the wear and deformation of the die 12 is large and it is determined that it must be replaced. Ta.

However, wear and deformation of the die 12 do not necessarily occur evenly over the entire die.

Due to the contamination of the connection compound extruded from the inside of the sleeve 18, the central portion 12 of the die 12 may
Even though there is not much wear near 0, there may be significant wear on both sides.

If compression is performed using such a die 12, the width A of the sleeve 18 after compression will show an acceptable value even though the degree of compression is actually insufficient, and correct determination will not be made.

This invention provides a discriminator that can correctly determine whether a die is good or bad even in the above-mentioned cases.

Embodiment (Fig. 3) 30 shows the entire discriminator, and 32 its main body.
It has a cylindrical shape, and its thickness is made according to the shape of the die 12 of the compression tool, and may be approximately the same size as the sleeve 18.
The length may be the same as the sleeve 18 or slightly different, but the longer the length, the better the determination accuracy will be. It is made of materials that easily undergo plastic deformation, such as soft metals such as lead and aluminum, or plastics such as styrene resin.

34 is a thin hole drilled in the center of the main body 32.

36 is a striated body made of a material that is difficult to stretch, such as hard metal or strong string.

This wire body 36 is passed through the thin hole 34 and one side 360 of the wire body 36 is fixed to the main body 32. Further, the free end 362 is left slightly outside the main body 32.

Operation Using a compression tool, the discriminator 30 is compressed a predetermined number of times from the side where the filament 36 is fixed. Discriminator 3
0 is compressed radially, so it stretches axially. The higher the degree of compression, the greater the elongation, and the lower the degree of compression, the lower the elongation.

Therefore, when compression is performed at a specified compression degree,
That is, when the wear and deformation of the die 12 are still small, the main body 32 and the linear body 36 are inserted so that the free end 362 of the linear body 36 just enters and is hidden within the main body 32.
Determine the length relationship between

Then, if the free end 362 of the filament 36 is hidden, the die 12 is good, and if it remains outside the main body 32 even after compression, the die 12 is defective and due to wear and tear. It can be seen that there are many deformations.

Note that instead of the filament 36 itself being hidden within the main body 32, a suitable marking may be applied to the self-oil end so that it is hidden within the main body 32.

Effects of the invention Conventionally, the degree of wear and deformation of the die was determined by the width of the compressed sleeve, but with this invention, it is determined by the cross-sectional area. Therefore, no matter how the die is worn or deformed, it is possible to accurately determine whether the die is good or bad.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tip of a compression tool, FIG. 2 is an explanatory diagram of a conventional pass/fail determination method, and FIG. 3 is an explanatory diagram of an embodiment of the discriminator of this invention. 10: Frame, 12: Dice, 16: Electric wire,
18: Sleeve, 30: Discriminator, 32: Main body, 3
6: Striatum.

Claims (1)

[Claims for Utility Model Registration] A linear body 36 made of a material that does not stretch is passed through the center of a cylindrical body 32 made of a material that easily undergoes plastic deformation, and one side 360 of the filament body 36 is fixed to the body 32. The free end 362 is extended outside the main body 32, and when the main body 32 is compressed a predetermined number of times from the fixed side of the filamentous body 36 using a compression tool, the filamentous body 36
A quality discriminator for a compression tool, characterized in that wear and deformation of the die 12 of the compression tool are checked based on the degree to which the free end 362 of the compression tool penetrates into the main body 32.