JPS63105858A - Control method for machine tool with loading device - Google Patents

Abstract

PURPOSE:To improve workability of a machine tool, its productivity and safety, by constituting the machine tool performing a preparation process of material to and a product out-carrying process from the machine tool through starting by a switch as the sequential action and automatically advancing the sequence of a work mounted to and removed from the machine tool. CONSTITUTION:Loading and unloading action, for successively moving a work to a material in-carrying part 4, machine tool 1 and a product out-carrying part 6, and action in each part relating to machining by this machine tool are programed to be built in a sequential circuit. And a device advances each action of sequence through a step start by a switch 19 automatically advancing the sequential action of the work mounted to and removed from the machine tool 1, in a preparation process of carrying a material in the machine tool 1, while each action of the sequence through the step start by a switch 20 in an out-carrying process after machining completion of the work. Consequently, the work of unstable loading enables its machining to be automatized, and the device, facilitating mounting and removal action of the work and reducing the time, improves workability of the machine tool, its productivity and safety.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for controlling the loading and unloading operations of a NG machine tool when carrying in a workpiece as a material, attaching and detaching the workpiece to the machine, and unloading the product.

Conventional technology NC lathes are automated by attaching robots, lobes, etc., but when attaching large or heavy workpieces such as aluminum wheels to the chuck of the lathe using the loading/unloading device, the aluminum wheels are not as-cast. Because the chuck was still in a black state, the chuck grip was uneven and distorted, making it unstable to load. In addition, mounting of heavy workpieces was unstable due to problems with the machinability of the loading device, and automation was difficult in both cases.

Problems to be Solved by the Invention For this reason, workers manually load and unload such workpieces with the help of auxiliary devices such as balancers, which is inefficient and unproductive. Moreover, there was also a safety problem.

Means for solving problems Material loading section 4. Processing 8g machine 1. Loading and unloading for sequentially moving the product unloading section 6 and the workpiece, and the operation of each part related to processing of this machine are incorporated into a sequence circuit, and in the preparation process for carrying the material into the processing machine 1, step activation by the switch 19 is performed. Each operation of the sequence is advanced, the sequence operation of attaching and detaching the workpiece to the processing machine is automatically advanced, and in the unloading process after the processing of the workpiece is completed, each operation of the sequence is advanced by step activation by the switch 20. .

Example Embodiments of the present invention will be described below based on the drawings.

In a well-known NC lathe 1, a power chuck 2 whose gripping claws are automatically opened and closed in response to a command is fitted to the end of a main shaft which is rotatably supported on a headstock by a bearing. Further, on the front side of the lathe 1, there is a cover 3a that is automatically opened and closed according to a command.

3b is provided. A material conveyor 4 is installed in front of the headstock on the left side of the front surface of the lathe 1 in parallel with the main shaft, and a contact plate 5 for defining a material receiving position is attached to the upper surface of the conveyor 4. In addition, a product conveyor 6 is installed in front of the tailstock on the right side of the front surface in correspondence with the material conveyor 4 to send the product to the next process.

Then, the loading device 7, which carries the material from the material conveyor 4 to the automatic chuck 2 of this machine and then to the product conveyor 6, moves in the direction of the spindle axis on the rail 8 that is hooked to the upper front surface of the covers 3a and 3b. Possibly listed. In this loading device 7, a first arm 10 is pivotally connected to an elevating plate (not shown) that is moved up and down relative to the carrier 9 by an air cylinder (not shown). This first arm is composed of parallel links within the cover, and a second arm 1 is attached to the lower end.
1 is pivotally connected and the first arm 10 is rotated in a vertical plane by an air cylinder (not shown), so that the second arm is always moved up and down and back and forth in the same vertical posture because of the parallel link. A gripper arm 13 having grippers 12a and 12b at both ends is provided as a hand portion at the lower end of the second arm 11. The grippers 12a and 12b are used for workpieces held by the grippers using an air cylinder (not shown).
The axis of the JW can be rotated vertically and horizontally by 90° and can be reversed by 180'. Furthermore, a safety shelf 14 is provided between the material conveyor 4 and the product conveyor 60 so as to be able to swing 90'' toward the machine side with one end as the center and open. Activated limit switches 15 and 16 are provided, and the safety shelf 14 is mechanically locked.Furthermore, the safety shelves [17, 18] are placed outside the operating range of the loading device 7 on the left and right sides.
is provided. In addition, in order to operate the safety shelf 14 in a closed state, a foot Y strain switch 19 that performs the sequence operation of the material Ys preparation process, and a foot switch 20 that performs the product unloading sequence operation are provided on the left and right sides of the safety s14, respectively. A foot switch 21 is provided for opening and closing the gripping claws of the automatic chuck 2 while the shelf 14 is open. Furthermore, a status display panel 22 is attached to the front of the headstock, and the display panel 22 is automatically displayed.

Each manual movement and Chasoking failure (NG) lamp are provided. In addition, there is an operation panel 2 on the top of the safety shelf 14.
3 is installed, and there are push button switches for automatic, individual, Chasoking failure, start, and emergency stop. In addition, an individual manual operation panel 24, which can be attached and removed, is installed alongside the operation panel 23, and is provided with a rotary switch.

Effect The effect will be explained with reference to FIG. 1 which shows a loading and unloading cream chart. A material, such as an aluminum wheel W, sent by a material conveyor 4 is positioned at a predetermined position by a contact plate 5, and a loading device 7
It is assumed that the gripper 12a is in a horizontal and open state with the hand section in the raised position and the original position of the machine in standby at the front of the machine.

When the foot switch 19 is stepped on, the carrier 9 of the loading device 7 moves to the left and stops on the material positioned by the contact plate 5. When the foot switch 19 is pressed again, the first arm 10 rotates, the hand part descends, and is stopped at the position where the material W is gripped. When the foot switch 19 is pressed again, the gripper 12a closes and grips the material W. When the foot switch 19 is pressed again, the hand portion is raised to a predetermined position. When the foot switch 19 is pressed again, the carrier 9 moves to the right and stops at the original position.

Note that if the foot switch 19 is continued to be depressed from the beginning to this point, the above operations will be performed continuously. Further, during these operations, the material attached to the automatic chuck 2 is being cut by an automatic machining cycle. When the carrier 9 stops at the original position, the gripper arm 13 of the hand part is turned from horizontal to a vertical state facing the chuck 2 side by an air cylinder (not shown) and is on standby, and the AND condition of completion of this state and completion of machining of the material W is satisfied. and move to automatic sequence.

The first arm 10 of the loading device 7 pivots to position the empty gripper 12b in front of the automatic chuck 2.

Next, the carrier 9 is positioned to the left to grip the processed product.Then, the gripper 12b is closed and grips the product on the chuck. The jaws of automatic chuck 2 are opened. At the same time, air is blown toward the material side from a nozzle of an air blower (not shown), and the nozzle is moved up and down by inching. Next, carrier 9 moves to the right to pull out the product.
Then, the hand part is turned over by 180" and gripper 12a
The material comes directly in front of the chuck 2.Then the carrier 9 moves to the left to insert the material W into the chuck 2.Then the chuck 2 is closed. During this time, the outer circumference of the material.

The gripper gripping claws, chuck claws, and chuck reference surface are blown with air. Then, the gripper 12a opens and the carrier 9
moves to the right. At this point, the main shaft of the lathe 1 enters an automatic inching operation and is rotated at a low speed. During this rotation, the runout of the material, that is, the chaffing state, is visually inspected. One way solution 1
The arm 10 rotates and moves out of the machine. If no deflection of the material is observed during zero inching, the arm 10 is moved out of the machine.
Press the automatic start button. When this button is pressed, the inching operation stops and the first arm 10 rotates to close the covers 3a and 3b.
If you are outside, the AND condition is met and you are automatically covered 3a.
.

3b closes. Then the automatic processing cycle begins.

After this, the step operation starts and the foot switch 20 on the right side
When stepped on, the hand section will fall horizontally. Next, when the foot switch 20 is stepped on, the carrier 9 moves to the right.

Next, when the foot switch 20 is stepped on, the first arm 1o turns and the hand part is lowered, and is positioned at a position with a slight gap on the product conveyor 6.
When stepped on, the gripper 12b opens and releases the product onto the product conveyor 6. Next, press the foot switch 20'! - When the foot switch 20 is stepped on, the first arm 10 turns and the hand section rises to a predetermined position.Then, when the foot switch 20 is stepped on, the carrier 9 moves to the left to its original position. If the foot switch 20 is continued to be depressed after gripping the product, the operations will be performed continuously. When this left movement is completed, the hand section is automatically reversed by 180''.

During the process, the material is gripped by the automatic chuck 2, and the material runs out during low-speed rotation of the spindle, resulting in defective chaffing. If the operator switches the changeover switch to indicate defective chaffing, the status will be displayed f.
The f122 chaffing failure light is on. Step on the foot switch 20 on the right side to move the carrier 9 to the right to the product unloading position. The changeover switch of the operation switch 23 is switched from automatic to chaffing failure. and safety fence 1
4. Open and rotate 90'' to mechanically lock the safety fence. 0. Next, step on the chunk foot switch 21 to hold the material by hand so that it does not fall off, re-grip the material, and use a switch on the operation panel (not shown) to inching. Rotate the main spindle at low speed and re-grip until you confirm that there is no wobbling in the material 6' Next, turn the safety JIl1114 at 90 @ and close the safety shelf to mechanically lock it.Switch the changeover switch on the operation panel 23 to automatic and press the start button. Press to enter automatic processing.

Effects As detailed above, in the present invention, the process of preparing the material to the processing machine and the process of carrying out the product are activated by a switch to perform sequence operations, and the sequence of loading and unloading the workpiece to and from the processing machine is automatically advanced. Therefore, it is possible to automate the processing of workpieces with unstable loading, and the workability is improved by making attachment and detachment easier and in shorter time, which has the effect of improving productivity and safety.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a time chart of loading and unloading, FIG. 2 is a perspective view showing the relationship between the loading device of this machine, a conveyor, and a safety shelf, and FIG. 3 is a plan view thereof. 2...Automatic chucks 3a, 3b...Cover for removing chips 4...Material conveyor 5...Packing plate 6...Product conveyor 7...Loading device 9...Carrier 10...1st arm 11...2nd Arms 12a, 12b...g') 7pa

Claims (1)

[Claims] (1) Loading and unloading to sequentially move the workpiece to the material loading section, processing machine, and product unloading section, as well as the operation of each processing-related part of this machine, are incorporated into a sequence circuit, and the loading and unloading operations for moving the workpiece sequentially to the material loading section, processing machine, and product unloading section, as well as the operations of each processing-related part of this machine, are incorporated into a sequence circuit. In the preparation process, each operation of the sequence is advanced by step activation by a switch, the sequence operation is automatically advanced when the workpiece is attached to and removed from the processing machine, and the sequence is activated by step activation by a switch in the unloading process after machining of the workpiece is completed. A method for controlling a machine tool with a loading device, characterized by advancing each operation.