JPS5918143B2 - Method for manufacturing tilling claws - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing tilling claws, and aims to improve yield, facilitate manufacturing, and reduce manufacturing costs.

The tilling claw 1, such as a hatchet claw, is L in the middle as shown in Fig. 1.
It is curved in a letter shape, has a mounting hole 3 on the mounting part 2 side, and a blade part 4 on the front edge side, and when viewed from the side, has a certain amount of curvature toward the rear as a whole. Normal.

By the way, when manufacturing the tiller claw 1 with this kind of warp, when cutting a unit material of a predetermined size from a sheet material such as a steel plate, the material has already been warped, so conventionally This method has the drawbacks of wasting a lot of time and significantly reducing yield.

The present invention solves these conventional problems, and is characterized by inserting a cut unit material between a pair of rolling rolls while guiding it with a front guide member, and rolling A method for manufacturing a tiller claw in which a blade portion is formed by rolling a side edge of a material in the width direction with a roll, and the other side edge in the width direction of the material that has passed between the rolling rolls is guided by a rear guide member. After this, the position of the guide member is adjusted in the width direction of the material to adjust the amount of warping of the material that occurs when forming the blade portion.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment.
Figures A to E show the manufacturing process.

When manufacturing the tilling claw 1, first, as shown in FIG. 2A, a continuous strip material 5 of a predetermined width is cut into strips with a required dimension of 2L, and then the longitudinal center portion of this short fence-like material 6 is inclined. After cutting along the cutting line 7 to make two unit materials 8 as shown in FIG. At the same time, the raw material 8 is warped by a predetermined amount on the side opposite to the blade portion 4, and this is done as shown in FIGS. 3 to 5.

That is, in FIGS. 3 to 5, 9 is the upper rolling roll.
10 is a lower rolling roll. This lower rolling roll 10 has a tapered part 11 for forming a blade part, and both rolling rolls 9,
10 is configured in a semicircular shape.

12 is a stopper, 13 is a front guide member that guides the raw material 8 before cutting to the rolling rolls 9 and 10, and 14 is a rear guide member that guides the rolled part of the raw material 8 after passing through the rolling rolls 9 and 10. The rear guide member 14 is in contact with the side line of the material 8 opposite to the side on which the blade is formed, and can be freely adjusted in position in the width direction of the material, that is, in the direction of the arrow a, in order to adjust the amount of warpage.

Therefore, when rolling the material 8, both rolling rolls 9 and 1 are first rolled.
0 is stopped in the state shown in FIG. 5, insert the material 8 from the front in the direction of arrow b into the gap created between them, and bring the tip of the material 8 into contact with the stopper 12.

Next, the clutch is connected and both rolling rolls 9 and 10 are rotated in the directions of arrows C and d, and the widthwise side edges of the material 8 are rolled to form the blade portion 4.

In this case, rolling the widthwise side edges of the material 8
As shown in FIG. 3, warping occurs toward the other side in the width direction, so a guide member 14 is brought into contact with the other side edge in the width direction, and the material 8 is guided by this guide member 14 in the direction of the arrow e. death,
As a result, the amount of warpage of the material 8 is regulated as shown in FIG. 2C.

Needless to say, the amount of warpage can be determined by adjusting the position of the guide member 14.

In this way, after forming the blade part 4 on the material 8 and giving it a predetermined amount of warp as shown in FIG. As shown in the figure, a mounting hole 3 is drilled on the mounting part 2 side, and the tip part 15 and the corner part 16 are cut, and finally, it is bent into an L shape along the bent edge 17 at the center in the longitudinal direction. , a tilling claw 1 as shown in FIG.

As described in detail in the embodiments above, in the present invention, the other side line in the width direction of the material that has passed between the rolling rolls is guided by the rear guide member, and the position of the rear guide member is adjusted in the width direction of the material to Since the amount of warpage of the material that occurs during forming is adjusted, the rolled part of the material is accurately guided so that it has the required warp, and the warpage can be easily and reliably prevented by simply adjusting the position of the rear guide member in the width direction of the material. It becomes possible to adjust the amount.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, with FIG. 1 being a perspective view of a tiller, and FIGS. 2A to 2E showing the manufacturing process. FIG. 3 is a plan view of the rolling apparatus, FIG. 4 is a front view thereof, and FIG. 5 is a side view thereof. 1... Cultivating claw, 4... Blade part, 8...
...Unit material, 9...Top rolling roll, 10.
...Lower pressure cotton roll, 12... Stopper, 13, 14... Guide member.

Claims (1)

[Claims] 1. A method for manufacturing a tiller claw in which a cut unit material is inserted between a pair of rolling rolls while being guided by a front guide member, and the rolling rolls roll the widthwise side edges of the material to form a blade part, The other side line in the width direction of the material that has passed between the rolling rolls is guided by a rear guide member, and the position of this rear guide member is adjusted in the width direction of the material to adjust the amount of warping of the material that occurs when forming the blade portion. A method for manufacturing a tiller claw characterized by: