JPH0451249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tool life management device for a punch press.

(Prior art) For example, in conventional punching machines, workers manually proceeded with the work by positioning the workpiece using a stylus, following the positioning of a template. Tool life was detected visually.

(Problems to be Solved by the Invention) Recently, as numerically controlled fully automatic punching machines have come into use, it has become impossible for workers to monitor them, making it increasingly difficult to ensure safe work.

Therefore, it has become possible to count the number of uses each time a punching command signal is sent by a numerical control device, but this does not detect the actual punching action, so tool life can be managed more accurately. There was a problem in doing so.

(Means for solving the problem) In view of the conventional problems as described above, the present invention
A numerical control section comprising a driving section of a striking element in a punch press and a calculation section that controls a motor for moving and positioning a workpiece in the X-axis and Y-axis directions, and the durability of the tool used in the punch press. A memory section that stores the number of times of use in advance and also stores an integrated value of the actual number of times that the tool is used; a detection section that detects the impact of the striker; and a data input section that is inputted from the arithmetic section of the numerical control section. comparing the number of durable uses of the tool corresponding to the tool identification signal and the actual number of times the tool is used by accumulating the number of times the striker hits the tool, and when they match, outputting an alarm to the calculation unit of the numerical control unit; It is equipped with a calculation section.

(Example) First, an outline of a turret punch press 1 in which the present invention can be implemented will be explained with reference to FIG.

The turret punch press 1 is equipped with an upper turret 3 and a lower turret 5 which can be rotated and positioned, and these are provided with a large number of punches 7 as tools and dies 9 corresponding to each punch.

The above-mentioned upper turret 3 and lower turret 5 are rotated as a pair by the electric motor 11 by the same amount in the same direction, and a desired pair is positioned directly below the striker 13.

A carriage 17 equipped with a gripping claw device 15 for gripping a workpiece W is moved and positioned in the X-axis direction along a carriage base 23 by an electric motor 19 and a feed screw 21.

Furthermore, the above-mentioned carriage base 23 is moved in the Y-axis direction by the electric motor 25 and the feed screw 27 to position the workpiece W at a desired location between the pair of punch 7 and die 9 directly below the striker 13. be.

As shown in FIG. 1, the tool management device 29 according to the present embodiment is separately provided alongside the numerical control section 31, and for each strike of the striker 13, the detection section 33 detects that the tool has been used once. The signal is introduced into the calculation section 35.

The detection by the detection unit 33 includes, for example, detecting that the striking member 13 has contacted the punch 7;
Alternatively, the actual impact may be detected by an appropriate means such as optically detecting the vertical movement of the impactor 13.

In addition, the tool management device 29 includes a data input section 3.
7, the user manually inputs the number of times the specific punch 7 can be used, for example, 1250 times.

This data is stored in the memory section 39 via the arithmetic section 35 described above.

The tool management device 29 described above further includes an output section 4.
1 is provided, and the calculation unit 35 performs a comparison calculation on the difference between the data regarding the number of durable uses of a specific punch 7 manually input from the data input unit 37 and the integrated value of the actual number of uses of the same specific punch. The calculation result is sent to the calculation section of the numerical control section 31 via the output section 41.

That is, if the integrated value of the actual number of uses has reached the number of durable uses, an alarm is issued to the calculation section of the numerical control section 31, or an instruction signal is issued to replace the tool with a new one.

In addition, a tool identification signal related to the rotation angle command of the turret is transmitted from the calculation unit of the numerical control unit 31 to the data input unit 37 shown in FIG. Start accumulating the number of times the tool is used.

The T code shown in FIG. 1 means a tool identification code.

In addition to the above, the numerical control unit 31 includes a control mechanism for a positioning device that grips the workpiece W and moves and positions it in the X-axis and Y-axis directions, and a control mechanism related to the operation of the striker. Since this is a common device used in the numerically controlled turret punch press 1, its explanation will be omitted.

FIG. 3 shows three types of data stored in the memory section 39 of the tool management device 29. The actual number counter (integration) 43 adds up the number of times each tool is used. This is what I remember.

Next, what is shown as a preset value 45 is a part that stores the number of durable uses manually input for each tool.

What is shown on the far right side is a tool classification section 47 that stores where pairs of the same size and shape are prepared in a large group of tools.

The calculation unit 35 of the tool management device 29 constantly compares the three types of memory data illustrated in FIG. 3, and issues an alarm or commands tool replacement.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG.

The process starts with the three types of data shown in FIG. 3 stored in the memory section 39.

Which pair of a large number of tools (punch and die pairs) to use is automatically input when the turret is rotated and positioned.

When the striker 13 operates, it is detected by the detection unit 33, and the number of times the tool has been used changes to an integrated value incremented by 1, but if the striker 13 does not operate, it remains in a standby state.

Next, in the portion indicated as a comparison match, the calculation section 35 compares the actual number counter 43 and the preset value 45 in FIG.
This means comparing the two to see if they match.

If they match, the process proceeds to an alarm instruction to issue a warning or stop the subsequent work, and if an alarm instruction is not required, the turret rotation may be performed for tool exchange with another pair of tools of the same size and shape.

If there is no comparison match, return to the starting point,
You may change the tool attachment for the next job, and you are free to do the next job with the same set of tools.

The lower part of Figure 4 shows that the alarm system returns to the standby state by pressing the reset button when the alarm starts to sound, when an automatic tool change is performed, or when a separate tool pair is replaced with a new one. , indicates that the actual number counter returns to zero.

(Effects of the Invention) As can be understood from the description of the embodiments as described above, in short, the present invention has the advantage that the driving part of the striking element 13 and the workpiece W in the punch press 1 are
A numerical control unit 31 includes a calculation unit that controls a motor for moving and positioning in the axial direction, and a numerical control unit 31 that stores in advance the number of durable uses of the tools 7 and 9 used in the punch press 1, and
A memory unit 39 that stores the accumulated value of the actual number of times of use.
and a detection unit 33 that detects the strike of the striker 13.
Then, the number of durable uses of the tools 7 and 9 corresponding to the tool identification signal inputted from the arithmetic unit of the numerical control unit 31 via the data input unit 37 and the number of strikes with the hammer 13 for the tools 7 and 9 are accumulated. a calculation unit 3 that compares the number of times of actual use and outputs an alarm to the calculation unit of the numerical control unit 31 when they match;
5.

As is clear from the above configuration, in the present invention, the number of durable uses of the tools 7 and 9 in the punch press is stored in advance in the memory section 39, and the detection section 33 that detects the impact of the striker 13 detects the impact of the tools 7 and 9. , 9 is detected, and when the actual number of uses of the tools 7, 9 becomes equal to the number of durable uses, it is determined that the tools 7, 9 have reached the end of their service life, and the calculation unit 35 performs numerical control. The configuration is such that an alarm is output to the calculation section of the section 31.

Therefore, according to the present invention, it is possible to prevent a decrease in machining accuracy due to tool life and damage to the tool. In particular, the present invention provides tools 7,
The actual number of strikes of the striker 13 against the striker 13 is detected by the detection unit 33, and the actual number of strikes is detected by a drive command from the calculation unit 13 of the numerical control unit 31 to the drive unit of the striker 13. Since it is not detected, if there is no actual strike by the striker 13 due to a failure of the drive unit, for example, the number of strikes is not added up, and more accurate life management can be performed. It is something that can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is a schematic illustration of the turret punch press, FIG. 3 is a block diagram explaining the memory section of the tool management device, and FIG. 4 is an operation flowchart. (Explanation of symbols representing main parts of drawings), 13...
Striker, 29... Tool management device, 31... Numerical control section, 39... Memory section, 43... Real number counter, 4
5...Preset value.

Claims (1)

[Claims] 1. A numerical control unit 31 comprising a drive unit for the striker 13 in the punch press 1 and a calculation unit that controls a motor for moving and positioning the workpiece W in the X-axis and Y-axis directions; a memory unit 39 that stores in advance the number of durable uses of the tools 7 and 9 to be used and also stores an integrated value of the actual number of uses of the tools 7 and 9; a detection unit 33 that detects the impact of the striking element 13; The numerical control section 3
The number of durable uses of the tools 7 and 9 corresponding to the tool identification signal inputted from the calculation section 1 through the data input section 37 and the actual number of times of use which is the cumulative number of strikes of the striking element 13 on the tools 7 and 9 are calculated. A tool life management device for a punch press, comprising: a calculation section 35 that outputs an alarm to the calculation section of the numerical control section 31 when the comparison results in a match.