JPH07124679A - Calking jig - Google Patents

Abstract

PURPOSE:To prevent the deformation and the breakage of a rotary roll by penetrating one pair of rolls for calking and a roll supporting body with a supporting shaft, fixing the supporting shaft to holding body and successively arranging the holding body and the rotary shaft. CONSTITUTION:The rotary rolls 4, 4 ire formed of a high seed tool steel and the outer peripheral ridges 5, 5 are made to be the 1/4 circle-arc recessed peripheral surfaces and the outer peripheries of the rotary rolls 4, 4 are formed as semicircular arc recessed peripheral surface as the whole body. The center parts of the rotary rolls 4, 4 and the upper part of the roll supporting body 3 are penetrated and the fixed supporting shaft 6 is penetrated into the penetrating parts, and the shaft end parts 7, 7 at both sides are fixed to the holding body 2, Suitable number of thrust bearings 8 are interposed between the rotary rolls 4, 4 and closely arranged. The thrust bearings 8 are closely supported between the rotary rolls 4 and the roll supporting body 3 and further, the thrust bearings 10 are interposed between the holding part 3 at both sides and both side walls 9. The lower part of the holding body 2 is successively arranged with the slidable rotary shaft 1 in the axial direction. By this method, the precision of the calking can always be obtd. in the good condition.

Description

Detailed Description of the Invention

[0001]

[Industrial application] This invention is used for caulking work in which the heads of various tacks and the outer ends of pins of chain conveyors are projected, and is a durable caulking cure that maintains good caulking accuracy for a long period of time. Regarding the ingredients.

[0002]

2. Description of the Related Art Conventionally, as a caulking jig, two caulking rolls each having a curved concave outer periphery and provided so as to rotate in opposite directions are pivotally supported on a rotatable roll support. , The roll support is slid up and down, and the outer periphery of the roller of the caulking jig is brought into contact with the concave portion of the metal rod at the tip of the metal rod, and the caulking jig is strongly pressed and rotated. The tip was bent in a curved shape.

[0003]

In the conventional crimping jig as described above, the concave portion of the outer periphery of the roller is brought into contact with the tip of the metal rod, and the crimping jig is strongly pressed and rotated. The caulking efficiency tends to be extremely poor because the contact surfaces between the two rolls and between the two rolls and the holder are worn or deformed by short-term use. The present invention has been made in view of such problems, and an object thereof is to provide an appropriate number of thrust bearings on the contact surfaces between the rolls and between the two rolls and the holder. By arranging them, the caulking efficiency can be kept good for a long time by minimizing the wear and deformation between the rolls of the caulking jig and the contact surfaces of the two rolls and the holder. It is to provide a caulking jig that can.

[0004]

In order to achieve the above-mentioned object, an appropriate number of two caulking rolls, each of which has a curved concave outer periphery and is provided so as to rotate in mutually opposite directions, are provided. And the two caulking rolls are closely supported by a roll supporting member on the outer side thereof through a proper number of thrust bearings, and the pair of caulking rolls and the roll supporting are supported. The body is pierced by a support shaft, the shaft end of the support shaft is fixed by a holding body, and the lower portion of the holding body is connected to a rotary shaft slidable in the axial direction.

[0005]

[Function] When the caulking jig is rotated while the tip of the caulking metal round bar is pressed against the curved concave section of the caulking roll of the caulking jig, the tip of the metal round bar is curved concave section of the roll. It has a curved concave shape corresponding to, and the outer peripheral edge projects, so that it can be crimped into a mushroom shape. At that time, since the appropriate number of thrust bearings are interposed between the rolls and between the two rolls and the contact surface of the holder, the rolls can be smoothly rotated.

[0006]

Embodiment 1 An embodiment will be described with reference to the drawings.
This caulking jig a is basically a holding body 2 that is continuously provided on the upper end of a rotary shaft 1 that can slide up and down, a roll supporting body 3 held by the holding body 2, and a roll supporting body. It is composed of a pair of rotating rolls 4 and 4 supported by 3.

The rotating rolls 4 and 4 are made of high-speed steel, and the rotating rolls have respective outer peripheral edges 5 and 5 which are concave circumferential surfaces having a quarter arc shape. It is a semicircular concave peripheral surface as a whole. The center part of the rotating roll and the upper part of the roll support 3 are penetrated, and the fixed support shaft 6 is penetrated through the penetrating part.
Is fixed to the holding body 2. Further, an appropriate number of thrust bearings 8 are interposed between the one rotating roll 4 and the other rotating rolls 4 so as to be arranged in parallel substantially in close contact with each other, and both side walls 9 of the holding portion 3 are provided. An appropriate number of thrust bearings 10 are interposed between the two.

A rotary shaft 1 is connected to the lower portion of the holding body 2, and the rotary shaft 1 slides in the axial direction.

During the caulking operation, the tip portion 12 of the metal round bar 11 is strongly pressed and rotated against the rotating rolls 4 and 4,
Alternatively, by rotating the concave peripheral surfaces 5, 5 of the rotating rolls 1, 1 against the tip 12 of the metal round bar 11 fixedly provided, the two rolls 1, 1 are reversed to each other. Rotating in the direction, the tip end portion 12 of the metal round bar 11 is deformed into a convex curved shape and a curved outer peripheral protruding edge 13 is formed. Normally, the outer peripheral edges 5, 5 of the rotating rolls 1, 1 are pressed against the end 12 of the metal round bar 11 which is fixedly provided, and the rotation speed is 500 rpm for several seconds. Thus, the end portion 12 of the metal round bar 11 can be deformed into a convex curved shape and the curved outer peripheral protruding edge 13 can be formed.

[0010]

Since the present invention is configured as described above, it has the following effects. The caulking jig according to claim 1, wherein the outer periphery of the caulking jig is formed in a curved concave shape, and two high-speed steel rotary rolls for caulking are provided so as to rotate in mutually opposite directions. And the two caulking rotary rolls are closely adhered to each other by a roll support through an appropriate number of thrust bearings on the outer side thereof, and the pair of caulking rotary rolls and the rolls are disposed. The support is pierced by a spindle,
Since the shaft end of the support shaft is fixed by the holding body and the lower part of the holding body is connected to the rotating shaft which is slidable in the axial direction, the two caulking rotary rolls rotate smoothly for a long period of time. The accuracy of caulking is always good. Moreover, the deformation and damage of the rotating roll can be prevented to a minimum.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a usage state of a caulking jig of the present invention.

FIG. 2 is a front view showing a usage state of the caulking jig of the present invention.

FIG. 3 is a bottom view showing a state where the shaft portion of the metal round bar is cut.

FIG. 4 is a partial sectional view of a conventional caulking jig.

[Explanation of symbols]

 1. ． Rotation axis 2. ． Holder 3. ． Roll support 4. ． Rotating roll 5. ． Outer rim 6. ． Fixed spindle 7. ． Shaft end 8. ． Thrust bearing 9. ． Both sidewalls 10. Thrust bearing 11. Metal round bar 12. Tip 13. Curved outer peripheral edge

Claims (1)

[Claims] 1. A high-speed steel two rotating rolls for crimping, which are formed in a curved concave shape on the outer periphery and are provided so as to rotate in mutually opposite directions, are brought into close contact with each other through an appropriate number of thrust bearings. And the two caulking rotary rolls are closely contacted to the outside by a roll support through a proper number of thrust bearings, and the pair of caulking rotary rolls and the roll support are provided. A caulking jig characterized in that it is penetrated by a support shaft, the shaft end of the support shaft is fixed to a holding body, and the lower part of the holding body is connected to a rotary shaft slidable in the axial direction.