JPH01205964A - Workpiece machining system in many types and small lots production - Google Patents

Abstract

PURPOSE:To implement automatically a treatment pattern upon the occurrence of a trouble by saving the treatment pattern for a trouble occurrence of a tool lifetime, a tool abnormality and the like in both a cell and a host computer in advance during a continuous process. CONSTITUTION:A treatment pattern upon the occurrence of a tool lifetime, a tool abnormality and other troubles is preliminarily saved in the cell (operation panel) 24 of a machine tool 4 and a host computer 21. Upon the occurrence of a trouble, the cell 24 immediately makes the emergency stop of the machine tool 4 and a processed workpiece is loaded to a complete product pallet, while a raw workpiece is loaded to a raw material pallet. Thereafter, the lathe (machine tool) 4 and a robot 5 are returned to a machine datum and an operator call is outputted. Concurrently therewith, data related thereto is sent to the host computer 21. When an operator does a machining reset work, the data of a tool lifetime, a raw material, a processed workpiece quantity and the like is updated and a lot processing information is transmitted. According to the aforesaid construction, the treatment pattern is automatically implemented upon the occurrence of a trouble and interference by an operator is minimized, thereby enhancing processing efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a workpiece machining system in high-mix, low-volume production.

. [Conventional technology] In large-scale, high-mix, low-volume production using multiple machine tools and robots, automated guided vehicles,
Measures such as automated warehouses, ATC (automatic tool changer), and AJC (automatic jaw changer) have been implemented.

[Problem to be solved by the invention]

However, if an unexpected problem occurs during unmanned operation, such as a cut-off of the tool's lifespan, the unmanned operation must be interrupted.

Furthermore, although the above-mentioned unexpected failures can be predicted to some extent, it is not always possible to operate in the same way, so perfect unmanned measures are impossible. Therefore, this system analyzes the method of operator intervention in the above-mentioned cases where machining must be temporarily interrupted, and attempts to reduce the number of interventions required as much as possible.

[Means to solve the problem]

In order to solve the above problems, the present invention stores a processing pattern in advance in both the cell and the host computer when a malfunction occurs, so that the processing pattern is automatically executed when a malfunction occurs.

〔Example〕

Examples will be described below based on the drawings.

Figures 3.4.5 are plane, side, and front views of the turret lathe, which is the machine tool of this embodiment, respectively, and show the spindle chuck (
1), a tool turret (2), and a support frame (3) for the lathe body (4);
It consists of a robot (5) attached to the front.

The robot (5) is attached to the frame (3) of the lathe body (4).
A movable frame (7) movably supported on a rail (6) installed horizontally along the front surface, and an arm body pivotable around a forward protruding shaft (8) perpendicular to the movable frame (7). (9), and a robot hand (11) for grasping a workpiece provided at the tip of the arm body (9), which is connected to the moving frame (7) for power supply and signal transmission to the robot (5). This takes place via a flexible cable duct (12). (13a) and (13b) are pallets for placing raw materials and finished workpieces (W), respectively.

(14) is a ball screw installed parallel to the rail (6), and when the ball screw (14) is rotated by the servo motor (15), the nut member (path shown) , -(14)
The movable frame (7) screwed into can be freely moved in the direction α in FIG.

In addition, the arm body (9) has a shoulder (16) provided at the end of the protruding shaft (8) that is horizontal to the floor (F), and is rotatable around the shaft (17) with respect to the shoulder (16). The protruding shaft (8) is supported by a slide member' (path shown) that is movable in the vertical direction of the movable frame (7), and the entire arm body (9) can be moved vertically. It is movable, and the shoulder portion (16) itself is also rotatable around the protruding shaft (8).

A robot hand (11) is provided at the tip of the arm portion (18) so as to be rotatable about the longitudinal axis of the arm ms (1g), and two grips (19) facing in opposite directions are provided on the robot hand (11).

FIG. 6 is a block diagram of the entire system according to the present invention, in which a host computer (21) is connected to a lathe (4) and a robot (5).
) is controlling a plurality of cells (22). Information is exchanged between the host computer (21) and the cell (22) using a communication line (23), and all communication is performed. (24) is a cell operation panel. In addition to the cell (22), the host computer (21) also communicates with an automated warehouse (25) and an automatic guided vehicle (26) via a communication line (23).

Next, the processing pattern when a problem occurs is set on the cell (22) side.
The first .
This will be explained based on FIG.

First, the pattern on the cell (22) side will be explained. When a malfunction occurs (step ■), an emergency stop occurs immediately (step ■).

What is an emergency stop? The processed workpiece (W) is placed on the finished product pallet (1
3b) The material work (W) goes to the material palette (13a
), both the lathe (4) and robot (5) return to their origin.

After an emergency stop, call the operator and step ■).
A signal to that effect is communicated to the host computer (21) (Step 2). After confirming that the operator has arrived (step ■), the operator determines whether it is possible to return to machining of the loft (step ■), and if it is determined that it is possible to return to machining of the loft, it is possible to return. (step ■) to update data such as tool life, material, number of processed workpieces, etc. (step ■) to update data such as tip exchange, trial cutting, and dimension check (step ■) to update data such as tool life, material, number of processed workpieces, etc., step (step ■) to communicate information that the loft can be restored. Wait for loft processing information ■ to be communicated (step 0), and when the communication arrives, return to processing the same lot (step 0). On the other hand, if the operator determines that it is possible to return to the loft in step ■, the power is manually turned off to 0FFL.
(Step 0), system goes down (Step 0)
). Also, if it is determined in step ■ that the operator is not coming, it is determined whether machining information ■ from another loft is being communicated from the host computer (21).
, If there is communication, processing of the other lot will begin (Step 0)
.

If there is no communication above, it is determined whether there is communication of automatic power OFF command (2) from the host computer (21) (step (2)), and if there is communication of automatic power OFF command,
Execute the command (step ■), system down (
Step ■).

However, if there is no automatic power OFF command at step (2), the process returns to step (2) again.

Next, the pattern of the host computer (21) II will be explained. First, when the cell (22) receives the communication that the operator has called (step O), it is determined whether the current machining mode is the manned mode (step O), and if it is the manned mode, the operator is called and the communication is received (step O). ), to confirm the communication from the cell (22) that the loft can be returned to the loft (Step O), and further to determine whether the host computer (21) side of the loft can return to processing in the step Q).

If it is determined that it is possible to return, the processing information of the lot is communicated to the cell (22) (Step 0), and the processing returns to the processing of the same lot (Step 0). On the other hand, if it is determined in step O that the mode is not manned, or if it is determined in step 0 that it is impossible to restore the loft to machining, it is determined whether the machining schedule can be skipped (step Q). Skipping a machining schedule means searching for a loft that can be machined in a later machining schedule, even if it is impossible to continue machining the loft currently being machined. If it is possible to skip the schedule in step O, instruct the warehouse (25) and automatic guided vehicle (26) to make arrangements for the skipped other loft by Kanisukeshinir.Step 0
), further communicates the processing information (■) of another loft to cell <22) (step O), and begins processing of the other lot (step 0). Finally, when it is determined that it is not possible to skip the schedule (step 0), an automatic power OFF command (■) is sent to the cell (step O), and the system is brought down (step O).

〔Effect of the invention〕

As is clear from the above explanation, according to the workpiece processing system according to the present invention, processing patterns for defects that occur during lot processing are stored in advance in the cell and host computer, and when a defect occurs, the processing pattern is automatically stored. Since the above-mentioned processing pattern is executed at the same time, operator intervention is minimal, and processing efficiency can be further improved.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing a processing pattern on the cell side of a processing system according to the present invention, FIG. 2 is a flowchart showing a processing pattern on the host computer side, and FIG.
4.5 are plan, side, and front views of the lathe including the robot, respectively, and FIG. 6 is a configuration diagram of the entire system. (4)・Machine tool (lathe) (5) Robot (21)・Host computer (22) Cell/no・'

Claims (1)

[Claims] A workpiece processing system for high-mix, low-volume production in which a plurality of cells consisting of a plurality of machine tools and robots attached thereto are controlled and operated by a host computer, in which tools are used in advance during continuous machining. A workpiece processing system for high-mix, low-volume production, characterized in that a processing pattern for the occurrence of problems such as tool life, tool abnormalities, etc. is stored in both the cell and the host computer, and the above-mentioned processing pattern is automatically executed when a problem occurs. .