JPH0221158Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a multi-stage automatic wire forming machine that automatically forms multi-stage bent wire links used in, for example, link mechanisms of automobile door locks. be.

(Prior art) In the manufacturing process of this type of wire rod link, straight wire rods are fed one after another and bent and formed in multiple stages and from multiple angles. Conventionally, wire forming machines suitable for this type of processing are The only methods available are a wire forming machine with multiple bending slides installed radially around a central wire feeding port, or a multi-stage process using multiple bending machines. A sensor detects the movement of the hydraulic cylinder and generates the torque (rotational force) of the servo motor.
This converts the bending force into bending force, which requires a large servo motor, and it is not possible to adjust the bending angle or operate accurately. Moreover, the latter method requires a lot of time and effort, is inefficient, and is not suitable for mass production.

(Technical Issue) Therefore, this invention aims to quickly and easily adjust the feed, rotation, and bending angle of the wire using a small servo motor, and to perform any complex multi-step bending process smoothly and efficiently. Consider it a technical issue.

(Technical Means) This invention was made in order to solve the above technical problem, and the drawing embodiment will be described in detail below. 3 is a wire receiving type having a receiving groove 7 of a shape or a U shape; It is fixed to the front end of the upper center of the machine base 1. Reference numeral 4 designates a presser mold corresponding to the wire receiving mold 3 attached to the lower end of a connecting rod 6 connected to the rod of the cylinder 5 above the frame 2. Then, when the cylinder 5 is actuated, the presser die 4 descends as shown in FIGS. 4 and 5, and presses at least one side ( In the case of Figures 4 and 5, on the bottom side) R 8a
are formed to constitute the wire guide clamp device A. Note that the wire receiving mold 3 and the holding mold 4 may have a structure having projecting plate portions 3a and 4a, respectively, as in the embodiment shown in FIG. It may also be formed on the lower side of the presser die 4 corresponding to the lower side of the presser die 4. Reference numeral 9 denotes a chuck mounted on a sliding base 12 which can be moved back and forth on a guide rail 12 by a servo motor 13 via a crank mechanism 14 behind the wire receiving mold 3; It is designed to be able to rotate forward and backward. Reference numeral 15 denotes a bending rod that vertically penetrates the frame 17 in the center of the frame 2 and is movable up and down.
A push tool 16 that can bend and form the wire rod 29 downward is provided on the front side. The bending rod 15 is connected to the upper cylinder 1 by a connecting plate 19.
It is connected to 8 rods. 20 is the pedestal 17
It is a wedge-shaped slope cam whose upper surface is a slope 20a in the front and back direction and can move forward and backward along the upper guide frame 21. The inclined cam 20 is moved forward and backward by a rear servo motor 22 via a crank mechanism 23. Further, 24 is an engager fixed to the lower surface of the upper connecting plate 19 corresponding to the slope cam 20, and the lower surface thereof is the slope 20a of the slope cam 20.
The slope 24a is parallel to the slope 24a. Therefore, when the bending rod 15 is lowered by the actuation of the cylinder 18, the lowering is stopped by the slanted cam 20 of the engager 24 and the stroke is determined, that is, the stroke can be varied by moving the slanted cam 20 back and forth. The bending angle can be adjusted by Reference numeral 25 denotes a bending rod operated by a cylinder 26 provided on the front left side of the wire receiving mold 3, and a trochanter 25a for bending the wire 29 to the right is attached to the tip.
Further, 27 is a bending rod operated by a cylinder 28 provided on the rear right side of the wire receiving mold 3, and a trochanter 27a for bending the end portion of the wire rod 29 to the left is attached to the tip. has been done. Each cylinder 5, 18, 26, 28 is connected to a fluid pressure unit such as air pressure or oil pressure via an electromagnetic switching valve (direction control valve, etc.), and each servo motor 10, 1
3, 22 and the electromagnetic switching valves that regulate the operation of each cylinder are connected to a computer memory circuit, and the chuck 9 grips the wire 29 supported by the wire holder 3, and rotates, feeds and clamps the wire 29 as appropriate. Automatic bending is performed in multiple stages.

(Function) First, the chuck 9 is moved forward by the servo motor 13, and a piece of wire 29 supplied from a wire feeder (not shown) is grabbed by the chuck 9 and received in the receiving groove 7 of the wire receiving mold 3. . Then check 9
moves back to the state shown in FIG.
The bending rods 15 and 25 are then clamped to perform bending. And finally wire rod 29
After the rear end is clamped by the presser die 4, the chuck 9 releases its grip and retreats, and then the end of the wire 29 is bent by the bending rod 27, and when the clamp is released, the wire rod 29 is, for example, shown in FIG. Link products like 3
0 is sent forward.

(Effects) As mentioned above, this invention uses a cylinder operation to perform the clamping of the wire rod by the holding mold and the bending process by each bending rod, respectively, so that the wire rod supported by the wire receiving mold is gripped by the chuck and then properly processed. Since the structure is such that automatic bending is performed sequentially in multiple stages by rotating, feeding and clamping, any complex multi-stage bending can be carried out smoothly and efficiently. In particular, the chuck can be moved forward and backward and rotated forward and backward by a servo motor, and the stroke can be varied by moving the wedge-shaped slope cam forward and backward by the servo motor, making it possible to adjust the bending angle of the wire with the bending rod. Using a servo motor, the feeding, rotation, and bending angle of the wire can be adjusted very easily, and it has outstanding effects such as being able to easily handle the production of any complicated multi-stage bending product. In addition, since a radius is formed on at least one side of the end surface of the clamp through hole of the wire rod formed by the wire receiving mold and the holding mold, if the wire rod is bent toward the rounded side, even if the bending angle is large, the material It is possible to obtain an excellent bent product that does not cause scratches or wrinkles, and furthermore, according to this invention, the end of the wire rod that was previously held by the chuck is Since the end portion can be bent and formed, it has excellent effects such as eliminating the inconvenience of manually forming the end portion later as in the conventional method.

[Brief explanation of the drawing]

The drawing shows an example of this devised molding machine.
Fig. 1 is a front view of the main part with a part cut out, Fig. 2 is a side view of the same, Fig. 3 is a perspective view showing an example of a molded product, and Fig. 4 is a front view of the main part of the wire guide clamp device. , FIG. 5 is a longitudinal sectional side view of the same, and FIGS. 6 to 8 are explanatory diagrams showing respective embodiments of the wire receiving mold and the presser mold. 1...Machine base, 2...Frame, 3...Wire receiver type,
4... Presser mold, 3a, 4a... projecting plate part, 5... cylinder, 6... connecting rod, 7... receiving groove, 8... clamp through hole, 8a... round, 9... chuck,
10...Servo motor, 11...Sliding table, 12
... Guide rail, 13 ... Servo motor, 14 ...
...Crank mechanism, 15...Bending and forming rod, 16...
Pusher, 17... Frame, 18... Cylinder, 1
9...Connecting plate, 20...Slope cam, 20a...Slope, 21...Guide frame, 22...Servo motor,
23... Crank mechanism, 24... Engagement element, 24a
... slope, 25 ... bending rod, 25a ... trochanter, 26 ... cylinder, 27 ... bending rod,
27a... Trochanter, 28... Cylinder, 29...
Wire rod, 30... Link product, A... Wire rod guide clamp device.

Claims (1)

[Scope of utility model registration request] A wire rod guide clamp device is formed with a wire rod clamping die on the machine stand and a cylinder-operated presser die, and has a radius formed on at least one side of the end surface of the wire rod clamping hole, and a servo motor is operated at the rear of the wire receiver die of the device. The front and rear sides of the wire receiving type include chucks that can be moved forward and backward with a servo motor and can be rotated forward and backward using a separate servo motor, and chucks that can change the stroke and adjust the bending angle by moving a wedge-shaped slope cam back and forth forward and backward using a servo motor. It consists of cylinder-operated bending rods arranged in respective cylinders, and is characterized by automatically bending the wire in multiple steps by appropriately rotating, feeding and clamping the wire held by the chuck and supported by the wire receiving type. Line multi-stage automatic forming machine.