JPH09253752A - Die changing tool control device of sheet metal working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die changing tool control device for switching working mode of a NC device automatically to 'die changing mode', when either of tools necessary for the changing are taken up at the time of the die changing, in a sheet metal working machine for example, a numerical control type-press brake. SOLUTION: A tool manipulating stand as the die changing tool control device is provided in close vicinity to a worker position, and each tool locking parts Sa, Sb for locking/holding, for example, 8mmϕwrench Ta and a closed wrench Tb at the apex of a manipulation box 3 are provided and when each locked tool existence and at least one of either tool detachment are detected with a non-contact sensor or the like, the working mode on a display panel image plane of NC device is made so as to be switched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool management device for changing a die of a sheet metal working machine.

[0002]

2. Description of the Related Art In a conventional sheet metal working machine such as a numerical control (NC) type press brake or the like, when a die such as a punch or a die is replaced, a work program mode in an NC controller is set to "die". It is configured to switch to the "exchange mode". The switching to the mold replacement mode is performed by the operator in charge, but in reality, the mold can be removed even if the mode switching is not performed.

When exchanging these molds, a predetermined tool is required and they are stored at a predetermined position. In order to perform a proper mold exchange procedure specified by the manufacturer of the machine, NC control is required. It is necessary to officially switch the working mode of the apparatus to a predetermined "mold change mode".

[0004]

However, in the conventional sheet metal working machine of this type, as long as the necessary tools are provided without switching to the "die change mode" in a regular manner as described above, the existing sheet metal working machine can be used. Since the mold can be removed, the regular required sequence may be disturbed and defects may occur.

The present invention has been made in consideration of the above situation, and when any of the necessary tools stored / held in a regular predetermined place is picked up at the time of predetermined die replacement,
NC machine work mode automatically "die change mode"
It is an object of the present invention to provide tool management means for changing dies that operates so as to switch to the.

[0006]

Therefore, in the present invention, in the sheet metal working machine, the holding means for storing the tool for exchanging the die and the presence or absence of the tool locked by the holding means are detected. And a tool detecting device for exchanging the tool, based on the output signal of the tool detecting means, a tool management device for die replacement including a working mode switching means for switching the working mode of the numerical controller of the machine. By providing, it is intended to achieve the above-mentioned object.

[0007]

With the above-described structure of the present invention, when the tool necessary for die replacement is pulled out from the predetermined storage location, NC is automatically performed.
The display panel screen of the apparatus is switched to the mold change mode display, and the regular mold change sequence is performed without waste.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail based on an embodiment.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows front and side views (a) and (b) of a tool operation stand as an embodiment of a tool management device for changing a mold of a press brake according to the present invention.
Further, FIG. 7C is a top view of the operation box portion at the top.

(Structure) In FIG. 1, this tool operation (management) stand is placed on the floor surface close to the position of the operator of the press brake, and is operated on the top of the column 2 on the substrate 1. A box 3 is provided, and a foot pedal switch 4 for operating the ram of the press brake is provided on the board 1.

On the operation box 3, there are tools required for die press work of the press brake, for example, 8 mmφ range Ta.
And dial wrench T for removing punch of dial type intermediate plate
Each tool locking portion S for locking / holding b
a and Sb are provided.

The feature of the embodiment of the present invention is that each tool engaging portion S
Each of a and Sb is provided with, for example, a proximity sensor or a contact sensor (not shown) as detection means for detecting the presence or absence of a tool, and when one of the tools is removed, the output signal of the tool detection means is output. Based on the above, the operation mode of the display panel screen of the NC controller (not shown) is switched from the "operation mode" to the "mold change mode" through the signal transmission line 5.

Further, on the upper surface of the operation box 3, a restart switch button 6 and its associated display lamp 7 for operating in connection with other safety devices and the like are provided.

The substrate 1 of the operation stand may be provided with caster wheels or the like so that it can be freely moved to a place where an operator can easily operate it.

(Operation) As described above, when either the tool 8 mm wrench Ta or the box wrench Tb necessary for exchanging the mold is pulled out from the respective tool engaging portion Sa or Sb, the NC device display is automatically performed. Since the panel screen is switched to the "die change mode", for example, the punch is placed on the V-shaped groove of the die according to the regular die change work procedure described in the original instruction manual attached to this machine. It also contributes to safety because it adheres to various precautions such as slipping and pulling out and not being removed by the punch alone.

Further, it is possible to immediately start the regular replacement work without taking time to find a necessary tool on the spot, and the manageability of the tool is improved.

In the die change mode, even if the operator accidentally steps on the foot pedal SW4, the ram is lowered / moved.
The operation such as raising is not performed.

[0018]

As described above, according to the present invention, for example, in a numerically controlled sheet metal working machine such as a press brake, when the die changing tools are detached from the respective locking / holding means, it is automatically performed. Since it is configured to be in the mold replacement mode, the mold replacement work can be performed safely, reliably and efficiently.

[Brief description of drawings]

FIG. 1 is a front view, a side view, and an operation box top view of an embodiment of a tool operation stand.

[Explanation of symbols]

 1 board 2 support 3 operation box 4 foot pedal switch 5 signal transmission line 6 restart button 7 indicator lamp Sa tool locking part 1 Sb tool locking part 2 Ta tool replacement tool 1 (8mm wrench) Tb tool replacement Tool 2 (glass wrench)

Claims (1)

[Claims] 1. A sheet metal working machine comprising: holding means for storing a tool for tool replacement, and tool detecting means for detecting the presence or absence of the tool locked by the holding means. A tool management device for die change of a sheet metal working machine, comprising work mode switching means for switching a work mode of the numerical control device of the machine based on an output signal of the tool detection means.