JPH034427Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an automatic trimming device for die-cast products that can continuously execute a series of steps from molding to trimming.

B. Prior art Products formed using die-casting machines have multiple parts connected to each other by branches, and even a single part has burrs attached to and around the cylindrical part that corresponds to the sprue. In order to do this, it is necessary to separate these using a trimming machine.

The die-casting machine and trimming machine mentioned above are separate from each other, and in the past, except for special cases, the molded products manufactured by the die-casting machine were manually set one by one into the trimming machine, but immediately after molding, The product was hot and difficult to handle, and required manual intervention, resulting in extremely poor work efficiency.

Examples of the above-mentioned special cases include cases in which a large-scale system was developed from the beginning including a die-casting machine and a trimming machine, and cases in which automation was attempted using specialized machines developed individually depending on the machines used. It will be done. As another example, a device described in Japanese Utility Model Publication No. 58-29691 was sometimes used.

C. Problems that the invention aims to solve The large-scale systems and special-purpose machines mentioned above are not common because their development and production costs are enormous. Also, the latter device is
Since the machine moves only by a combination of linear motions, it is necessary to secure a large space around the machine, and the work efficiency is poor. However, since it is not controlled by a computer, replacing the trimming mold in response to changes in the molded product requires a great deal of time to set up the mold and adjust the control mechanism, making it impossible to handle high-mix, low-volume production. However, it lacked versatility.

D. Means for Solving the Problems This invention focuses on the fact that the precision of robot arms has improved due to the development of computers, and by introducing computer control and rotary motion, we aim to reduce the movement space and make it more compact. This is an automatic trimming device for die-cast products that was developed for the purpose of having the same characteristics as the male and female molds, and its configuration includes a pressing mechanism that places male and female molds facing each other and applies press pressure to at least one of the molds in the facing direction. A trimming machine main body provided with a trimming machine body, a guide shaft provided horizontally along the side surface parallel to the press direction on the side of the main body, a movable body that moves horizontally along the guide shaft, and the movable body has the above-mentioned A robot arm that is rotatably attached and extendable around an axis parallel to the guide shaft, a chuck provided at the tip of the robot arm, opening and closing operations of the chuck, rotation, extension and contraction of the robot arm, and a moving body. It includes a computer control mechanism for controlling the movement of the.

E. Function With the combined motion of linear movement and rotation, the robot arm moves efficiently using the narrow space along the side of the trimming machine with the help of computer control, and moves the molded product from the die-casting machine to the trimming machine. It can be delivered to the position quickly and accurately and enables continuous trimming work. Furthermore, since it is controlled by a computer, even if the mold is changed or the setting position is moved, it can be easily handled by modifying the program.

F. Embodiment The drawing shows an automatic trimming device for die-cast products according to the present invention, in which a movable die 1a and a fixed die 1b are arranged facing each other, and both dies 1a,
A die casting machine having a take-out port on the side between 1b, 2 has male and female dies (movable die and fixed die) 2a and 2b facing each other for trimming, and presses the movable die 2a on one side in the facing direction. This is a trimming machine equipped with a pressing means 2c that applies pressure. Die casting machine 1 and trimming machine 2
As shown in the first figure, the molded products of the die-casting machine 1 are arranged so that one end of the trimming machine 2 is located on the side of the outlet 1c, keeping a predetermined interval and making the pressing directions coincide with each other. . A guide shaft 3, which has a thread groove carved over its entire length, is installed on the die-casting machine side surface of the trimming machine 2 (the side surface of the trimming machine 2, which is between the die-casting machine 1 and the trimming machine 2) at a constant interval from the side surface of the trimming machine 2. The guide shaft 3 is directly connected to the rotating shaft of the motor 4. Also, the trimming machine 2
On the side of the guide rail 5, parallel to the guide shaft 3,
5 is fixed. A movable body 6 is attached to the guide shaft 3, which is supported by the guide rails 5, 5, and is threaded in the axial direction by the rotation of the guide shaft 3 and screwed into the thread groove. 6
A robot arm 8 that is rotated by a motor 7 about a horizontal axis parallel to the guide shaft 3 is coupled to the robot arm 8 . The robot arm 8 moves forward and backward by a cylinder device 9, and is equipped with a chuck 10 at its tip, which is opened and closed by a small air cylinder provided within the arm. The motors 4, 7 and cylinder 10 are controlled by a computer in synchronization with the operations of the die-casting machine 1 and the trimming machine 2.
The computer program can be changed as appropriate.

In the automatic trimming device for die-cast products formed in this way, by moving the movable body 6 toward one end of the guide shaft 3, the robot arm 8 protrudes to the side of the trimming machine 2 and becomes in a state where it can freely rotate. When the robot arm 8 is in a horizontal position, the tip faces the product outlet 1c of the die-casting machine 1, and when the robot arm 8 is in a vertical position, the side surface of the trimming machine 2 can be moved along the guide shaft 3. I can do it.

Next, the basic operation of the above device will be explained. First, the robot arm 8 is moved to one end of the trimming machine 2 and is placed on standby in a horizontal position (second
figure). When it is confirmed that the movable die 1a of the die casting machine 1 moves and both dies are opened, the tip of the robot arm 8 moves forward by the action of the cylinder device 9. When the molded product is extruded from the movable die 1a and the cylindrical part integrally formed with the molded product enters between the claws of the chuck 10, the air cylinder 11 is operated and the chuck 10 pushes the cylindrical part. The cylinder device 9 moves again to move the robot arm 8 backward, and the molded product M is taken out from the die-casting machine 1.

Next, the robot arm 8 is rotated to a vertical position by the operation of the motor 7 (Fig. 3), and then the guide shaft 3 is rotated by the rotation of the motor 4, and the robot arm 8 sets the molded product in this position. The trimming position is moved laterally to the side beyond the trimming position (FIG. 4). Finally, by operating the motor 7, the robot arm 8 is rotated 45 degrees in the direction in which its tip approaches the trimming machine 2 side (Fig. 5), and then returned to the front fixed die 2b side to remove the molded product M. When the fixed die 2b is set in the mold of the trimming machine 2, and the fixed die 2b is provided on the opposite side symmetrically to the movable die 2a, it is moved in the opposite direction. When the setting is completed, return to the initial position by horizontally moving and rotating in the opposite direction to the above. In the meantime, a trimming press is performed to separate the product and unnecessary parts.

The above-mentioned series of work conditions are successively confirmed by detectors (not shown) placed at various locations, and the computer issues commands based on the confirmation.

This type of device requires extremely high precision, but the movements of each member, including the robot arm, are all instructed to a computer using three-dimensional coordinates, so it operates without any errors. When exchanging molds, you can simply call up pre-memorized coordinates or set new optimal coordinates for each set mold, making it highly versatile and suitable for high-mix, low-volume production. .

Furthermore, since the long robot arm is effectively rotated and moved in a straight line using the extremely narrow space along the side of the trimming machine, there is an advantage that the installation space is small and the device can be made more compact.

In the above embodiment, the rotation of a screw was used to move the robot arm, but a combination of a rack and pinion or a cylinder device could also be used.
Further, each operation may not be entirely controlled by a computer, but may partially utilize a conventional sequence circuit, and similarly, the power sources and control means for other movement systems are not limited to those in the embodiment. It is also possible to incorporate a rotation mechanism into the chuck to make it compatible with a vertical press type die-casting machine, or to incorporate a fine adjustment mechanism into the movement system of each member.
Furthermore, the other end of the trimming machine is positioned to the side of the molded product take-out position of the die-casting machine, and a motor for rotating the guide shaft is provided at a symmetrical position, so that the molded product is gripped and taken out at a position symmetrical to that of the embodiment. Modifications may be made as appropriate within the scope of achieving the above-mentioned objectives of the present invention.

G. Effects According to the present invention, a die-cast molded product can be transferred from a die-casting machine to a trimming machine using a narrow space by appropriately arranging the guide shaft and effectively combining rotation and linear motion of the robot arm. Continuous and automatic trimming can be performed, and there is no need for setup changes, making it highly versatile and of great practical benefit.

[Brief explanation of the drawing]

The drawings show an example of an automatic trimming device for die-cast products according to the present invention, FIG. 1 is an explanatory diagram showing the arrangement relationship between a die-casting machine and a trimming machine, and FIGS. FIG. 3 is a perspective view showing the operation of the robot arm. 1... Die casting machine, 1a... Movable die, 1b
...Fixed die, 2...Trimming machine, 2a...Movable die, 2b...Fixed die, 2c...Press mechanism, 3...Guide shaft, 4...Motor, 5...Guide rail, 6...Moving body, 7...Motor, 8...Robot Arm, 9... cylinder device, 10... chuck, M... molded product.

Claims (1)

[Scope of utility model registration request] A trimming machine main body in which both male and female molds are arranged facing each other, and at least one of the molds is provided with a pressing mechanism that applies press pressure in the facing direction. a guide shaft provided in the guide shaft, a movable body that moves horizontally along the guide shaft, and a robot arm that is attached to the movable body so as to be rotatable about an axis parallel to the guide shaft and that is extendable and retractable; An automatic trimming device for die-cast products, including a chuck provided at the tip of the robot arm, and a computer control mechanism that controls the opening/closing operation of the chuck, the rotation, extension and contraction of the robot arm, and the movement of the moving body.