JPH0275428A - Wire forming machine - Google Patents

Abstract

PURPOSE:To easily perform smooth bending by providing a mechanism in which rotary bending of wire is carried out, then, the wire is moved in a straight line as it is and cut. CONSTITUTION:The wire 6 is fixed by a clamping jaw 1 to a feeding rest 2 and the wire 6 is passed between a movable pin 5 and a fixed pin 4 in a shaft 8 of rotation. Then, the shaft 8 of rotation is rotated in the counterclockwise direction, a movable pin 5 is rotated to a position 5', a part (a) of the wire 6 is R-curved and then the movable pin 5 is returned to the initial position. Then, the feeding rest 2 is moved to a B-direction, the wire 6 is positioned by a stopper at a position 7', a press driving actuator 12 is operated to an A-direction, the wire 6 is fixed by a retaining die 10 and a compression spring 13 at the position 7' and the wire 6 is cut by a cutting die 11 at part (b) and part (c).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire rod mainly used for eyeglass frames, which is characterized in that a wire is rotatably beveled in an apparatus, and then cutting and bending are performed by a linear movement of a press within the apparatus. This is a box-leg wire forming machine.

Conventionally, when manufacturing a box foot, which is a nose butt holder, as shown in FIG. 8 as a typical example, (A) As shown in FIG. 25) and (j)
A method in which the wire rod (27) is shaped by bending, cutting, etc. using the box (25) as a reference. (b) A method of forming the wire portion (26) using a forming machine as shown in Fig. 10, and then joining it to the box (25). There was such a thing.

In addition, the box (2
There are methods such as holding 5) with a Yatco etc. and manually bending the wire rod (27), and directly creating a shape having (25) and (27) without joining at the l) part. However, since these methods are not numerical, their explanation will be omitted.

Method (a) has the disadvantage that it requires a large number of steps, is difficult to automate, and tends to cause variations in bending and cutting dimensions. Furthermore, when bending the wire rod (27), internal strain is likely to occur due to work hardening, twisting, constriction, etc., but since the wire rod (27) is immediately joined by brazing, heat treatment above the softening point of the solder material is impossible. However, it was not possible to remove internal stress through heat treatment or provide flexibility through the annealing effect. Therefore, it is difficult to adjust the nose bat to fit the nose.
Problems such as broken rivets and detached rivets were likely to occur. In addition, method (a) allows heat treatment before brazing and is easy to automate, but the equipment mechanism is complex and expensive, and it takes time to set up, so it is difficult to switch between left and right sides or between types. I was unable to increase the frequency of Making molds was also difficult and required a great deal of skill to produce the smooth curves unique to box feet.

Kimoto was invented to eliminate these drawbacks,
By combining bending by rotating motion within the device and cutting and bending by linear press motion, smooth bending can be easily performed.

After bending the wire rod, heat treatment can be applied to remove internal stress and give it appropriate flexibility, which improves the fit of the nose bat and also prevents rivets from breaking.
Troubles such as solder separation can be reduced.

In addition, productivity can be improved through automation, and the setting time is shortened because the mold part can be easily made into a single piece.

Due to its simple structure, the manufacturing cost of the device is extremely low, and it is compact, so it takes up less space.
In addition to this, productivity per hit before dropping was also improved.

A detailed description of the invention will now be given with reference to the drawings.

(Example 1) Figures 1, 2, and 3 (a) A wire rod (6) is passed between the fasteners (1) operated by a cylinder (14), and the wire rod (6) is passed along the guide rod (3). A feed table (2) movable in the direction (B) is provided.

(b) A fixed pin (4) is provided at the center of the end face of the rotating shaft (8), and a movable pin (5 ) will be established.

(c) A fixed mold (9) is provided as a fixed mold, a holding mold (io), a compression spring (13), and a cutting mold (11) are provided as a movable mold to operate the movable mold. A press drive actuator (cylinder) (12) is provided.

When the operation starts, the movable pin (5) starts rotating around the center of the fixed pin (4), rotates about half a turn counterclockwise, and moves to the position (5'). At that time, the movable pin (5),
The wire rod (6) passing between the fixing pins (4) is shown in Figure 1(a).
) part is rounded and changed to the shape (7).

After radius bending, the movable pin (5) returns to the position (5), and then the feed base (2) to which the wire (6) is fixed by the fastener (1) moves in the direction (B), Stopper (13
), and the wire rod whose tip has changed to the shape of (7) is fed into the mold at seven positions.

Thereafter, the press drive actuator (12) (A)
1 (b), ( Section C) is cut, and a product having the shape shown in FIG. 1 is molded.

(Example 2) Figures 4, 5, and 6 (a) It has a tightening tool (1) that is operated by a cylinder (14) through which a wire (6) is passed, and the wire rod (6) is inserted along the guide rod (3) ( A feed table (2) movable in direction B) is provided.

(b) A fixed pin (4) is provided at the center of the end face of the rotating shaft (8), and a movable pin (5) is placed at a position with an appropriate gap for the wire (6) to pass through the fixed pin (4). will be established.

Furthermore, a fixing plate (21) is provided at a position with respect to the end face of the rotating shaft (8) with a gap through which the wire rod (6) passes, and a forming pin (22) is provided on the plate.

(c) As the fixed side mold, the fixed mold (16), as the movable side mold, the holding mold (17) (18), the compression spring (
23) (21) A bending/cutting mold (19) is provided, and a press drive actuator (cylinder) (12) for operating the movable mold is provided.

When the operation is started, the movable pin (5) starts rotating around the center of the fixed pin (4), rotates about half a turn counterclockwise, and moves to the position (5'). At that time, the wire rod (6) passing between the movable pin (5) and the fixed pin (4) is passed through the movable pin (
5) Due to the action of the fixing pin (4) and forming pin (22), the portions (a) and (f> in Fig. 4 are rounded (1)
5) Changes in shape.

After radius bending, the rotating pin (5) returns to the position (5), and then the feed base (2) to which the wire rod (6) is fixed by the fastener (1) moves in the direction (B), Stopper (13
), and the wire whose tip has changed to the shape of (15) is fed into the mold at the position (15'). After that, the press drive actuator (12) is activated and the wire rod is moved to the position (15').
The wire rod (6) at position s') is cut and bent to produce the product shown in Figure 4.

At this time, the movement inside the mold is such that when the press drive actuator (12) is activated, the movable mold (17)<18>
(19) moves linearly in the (A> direction, and the presser die (1
7) (1g) presses down the wire (6) at the position (is') by the action of the compression springs (23) and (24).

Next, the bending and cutting die (19) enters the gap (20) into the fixed die (16), so that the part (h) becomes the part (d) in FIG.
) section, and the <i> section bends the section (e) in FIG. ), the bending process shown in FIG. 4(g) is performed, and a product having the shape shown in FIG. 4 is formed.

As shown in the examples, the present invention performs cutting and bending processing on a wire by combining forming by rotation and press forming by linear movement. There are various shapes of eyeglass frame box feet other than those in this example. but,
Most of the wire rods can be formed by a combination of radius bending and simple straight bending, and the mechanism of the present invention can form most of the box-leg wire rods.

Furthermore, the present invention can be widely used not only for forming box-leg wire rods for eyeglass frames, but also for processing objects that combine radius bending and straight bending in other fields such as ornaments and mechanical parts.

[Brief explanation of the drawing]

Figure 1 is a product diagram of Example 1. Figure 2 is an overall plan view of Example 1. Figure 3 is an overall front view of Example 1. Figure 4 is a product diagram of Example 2. Figure 5 is a product diagram of Example 2. FIG. 6 is an overall plan view of Embodiment 2, FIG. 7 is an overall front view of Embodiment 2, is an X direction arrow view of FIG. 6 in Embodiment 2, and FIG. Figure 10 is a conceptual diagram of a forming machine, in which (1) is a fastener, (2) is a feed table, (3) is a guide rod, ( 4) is a fixed pin, (5) is a movable pin, (6) is a wire rod,
(12) is press drive actuator (air cylinder, etc.) Procedure correction form (method) m%¥=? Fxh'ih'la%m

Claims (1)

[Claims] (a) A wire rod (6) between the fixing pins (4) and (4)
A rotationally movable pin (5) is provided at a position with an appropriate gap through which the pin (5) passes. (Figures 3 and 6) (b) The wire rod (6) is (
B) Provide a device that feeds a certain dimension in the direction. (c) The movable side is operated by a press drive actuator (12) that moves in the longitudinal direction (A) of the fixed pin (4) and the movable pin (5) and approximately horizontally, and has a mold for bending and cutting. A fixed mold is provided which performs bending and cutting in cooperation with the mold and the movable mold. (Figure 2, Figure 3, Figure 5, Figure 6) Wire forming machine configured as above