JP2573277Y2 - Protrusion measurement jig used for flare processing of refrigerant copper tube - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protrusion measuring jig used for flaring a copper copper tube.

[0002]

2. Description of the Related Art As shown in FIG. 3, a refrigerant copper tube connecting a heat source unit and a radiator is usually flared at a tip 2 of a copper tube 1 as shown in FIG. Is adhered to the union surface 6 of the connection base 5 and fixed by the flare nut 4. FIG. 4 shows a flared copper tube. This flaring process inserts the tip 2 of the copper tube 1 into the set hole 8 of the flaring bar 7 as shown in FIG. To the upper surface 7a of the flaring bar 7.
6, the flare cone 9 for flare processing is inserted from above, and the tip 2 of the copper tube 1 is expanded along the tapered surface 8a to perform the flare processing 3 as shown in FIG. is there.

[0003]

However, the conventional flare processing has the following disadvantages.

A. Since the protrusion size is as small as 0.5 mm, it is difficult to accurately obtain this size, which takes time and requires skill.

B. If the protruding dimension is out of order, the size of the processed flare surface varies, resulting in defective flare processing, which causes gas leakage.

SUMMARY OF THE INVENTION An object of the present invention is to provide a protrusion dimension measuring jig which does not have the drawbacks described in a and b above.

[0007]

The construction of the protrusion dimension measuring jig according to the present invention is as follows.

A guide core to be inserted into the copper tube is provided at the center of the ring in contact with the upper surface of the flaring bar, and the base of the guide core has a dimension from the lower end of the ring of 0.5 mm.
A jig used for flare processing of a refrigerant copper tube, wherein the jig is formed with a projection dimension setting step set at a predetermined angle, and a viewing window is formed so that the step can be viewed from the outside.

[0009]

[Function] During flaring, a copper tube is inserted into the set hole of the flaring bar and slightly protrudes from the upper surface of the bar. In this state, the guide core of the jig is inserted into the hole of the copper tube, and the lower end of the ring is brought into contact with the upper surface of the flaring bar while the tip of the copper tube is abutted against the protrusion dimension setting step of the jig. As a result, the dimension from the top surface of the bar to the tip of the copper tube protruding is set to 0.5 mm. The situation set to 0.5 mm can be confirmed from the viewing window. After finishing the dimensioning, fix the flaring bar and perform flaring using a flare cone.

[0010]

FIG. 1 shows a jig for measuring the protrusion size according to the present invention. 10 is a jig body, and this jig body 10 is a ring
11, a guide core 12 provided at the center thereof, and a guide core 12
And a viewing window (viewing window) 14. The height of the lower end 11a of the ring 11 and the height of the protrusion dimension setting step 13 are 0.5 mm.

FIG. 2 is an explanatory view of a situation in which dimensions are determined by using the jig having the above-described configuration.
Is brought into contact with the upper surface 7a of the flaring bar 7 and the tip 2 of the copper tube 1 is brought into contact with the step portion 13 so that
The protrusion size can be set to exactly 0.5 mm, and this condition can be confirmed from the viewing window 14. The flare processing after dimensioning is the same as the conventional example.

[0012]

[Effect of the Invention] By setting the protrusion amount using the protrusion dimension measuring jig according to the present invention, not only the flare processing work is simplified, but also the protrusion amount is accurately adjusted to 0.5 mm.
Therefore, there is no risk that the dimensions of the flared surface will vary and cause gas leakage.

Further, since the guide core is provided at the center of the jig, the positional relationship between the jig and the copper tube at the time of measurement can always be set constant.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a protrusion dimension measuring jig according to the present invention.

FIG. 2 is an explanatory diagram of a usage example of a jig.

FIG. 3 is an explanatory diagram of a connection example of a copper tube.

FIG. 4 is an explanatory diagram of a flare processing of a copper tube.

FIG. 5 is an explanatory diagram of a situation where a copper tube is set on a flaring bar during flaring.

FIG. 6 is an explanatory diagram of a situation in which flare processing is performed using a flare cone.

[Explanation of symbols]

 10 Jig body 11 Ring 11a Lower end of ring 12 Guide core 13 Projection dimension setting step 14 Visual window

Claims (1)

(57) [Scope of request for utility model registration] 1. A guide core inserted into a copper tube is provided at the center of a ring abutting on the upper surface of a flaring bar, and the base of the guide core has a dimension from the lower end of the ring of 0.5.
An extrusion-dimension measuring jig for forming a projection-dimension setting step set to mm, and forming a viewing window so that the step can be visually observed from the outside, which is used for flaring a refrigerant copper tube.