JPH01295712A - Cutting machine - Google Patents

Abstract

PURPOSE:To enable unmanned operation to be attained by providing a comparing means outputting an adjustment instruction signal, when a detected noise value exceeds a permissible value, and a cutting speed adjusting means adjusting a cutting speed to a less value being based on the above described adjustment instruction signal. CONSTITUTION:A cutting machine is provided with a noise detecting means 1 detecting a noise generated arising from cutting work, permissible value memory means 3 storing in memory a noise permissible value L0, comparing means 5 outputting an adjustment instruction signal AS, when a detected noise value L exceeds the permissible value L0, and a cutting speed adjusting means 7 adjusting a cutting speed to a less value being based on the adjustment instruction signal AS. That is, the noise value L is detected by the noise detecting means 1, when the detected value L exceeds the permissible value L0 arbitrarily determined in every time band, the adjustment instruction signal AS is output from the comparing means 5, and the cutting speed is automatically adjusted to a less value being based on this adjustment instruction signal AS.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cutting machine that cuts a workpiece with a saw blade or a grindstone.

(Prior art) Cutting Igi machines, such as band rIA machines, generate a considerable amount of lI during cutting work! Generate i sound. This noise can reach 100 horns especially when using difficult-to-cut materials such as stainless steel.

Therefore, in the past, in order to improve the workplace environment and comply with noise prevention ordinances, in addition to considering the machine layout and installing sound insulation equipment, it was necessary to manually adjust the cutting speed (for band saws, the saw blade speed and feed rate). speed) was being reduced.

(Problem to be Solved by the Invention) However, in the conventional method of reducing the cutting speed as described above, the cutting speed was manually reduced appropriately, so for example, as the saw blade wears out, cutting noise gradually increases. In addition, since noise regulation values vary depending on the time of day, constant monitoring of noise is required, which requires a lot of effort and makes unmanned operation impossible.

In addition, if you set a considerably low speed value from the beginning in order to save the trouble of adjusting the speed value over and over again, the cutting rate (cutting area per unit time) will be reduced and the cutting efficiency will be extremely reduced. There was a problem with this.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cutting machine that automatically suppresses the generated noise to an allowable value while maximizing the cutting rate and also enables unmanned operation.

[Structure of the Invention] (Means for Solving the Problems) As shown in FIG.
The tolerance storage means 3 stores the Aljl tolerance value LO, and the detected g sound value is within the tolerance value.

The present invention is characterized in that it includes a comparing means 5 which outputs an adjustment command signal As when the value exceeds the above adjustment command signal As, and a cutting speed adjusting means 7 which adjusts the cutting speed to a smaller value based on the adjustment command signal As.

(Function) In the cutting machine of the present invention, the noise detection means 1 detects the noise WiL, and when the detected value exceeds the allowable value LO arbitrarily determined for each time period, the comparison means 5 outputs the adjustment command signal As. The cutting speed is automatically adjusted to a smaller value based on this adjustment command signal As.

(Example) FIG. 2 is a system configuration diagram of a band saw machine implementing the present invention.

First, regarding the machine configuration, the saw blade 9 is routed around a driving wheel 11 and a driven wheel 13, and is driven against a workpiece W at a predetermined speed a based on the rotational operation of a servo motor M. . Further, a swing cylinder 19 is connected to the casing 17 which is vertically swingable with respect to the shaft 15, and the operation of the cylinder 19 causes the saw blade 9 to be sent to the workpiece W at a predetermined speed. It has become.

Next, the control device is configured to include a CPtJ21, and the C
The PLI 21 includes a data input device 23, a noise detector 25,
Flow rate controller 27.8! quantity detector 29, saw speed command device 31,
A saw speed detector 33 is connected.

The data input device 23 inputs the time and noise tolerance value Lo.
For example, the data for 8:00 AM to 6:00 PM 65th hour PM6:
00～PMI:00 60 hon PMII:00～
AM6:00 50th hour AM6:00~AM8:0
It is input like 0 60 horn.

The noise detector 25 is connected to a microphone 35 placed at an arbitrary position where noise is to be detected, converts the noise value input from the microphone 35 into an appropriate level, and outputs the level to the CPLJ 21. The microphone 35 may be used for purposes such as improving the factory environment or complying with noise prevention ordinances.
It can be attached to the main body of the machine, placed in a part of the factory, or installed on the boundary line of the factory site. Also, it may be shared by multiple machines.

The 1ffi command device 27 and the flow rate detector 29 are connected to the flow rate regulator 37 of the swing cylinder 19, and maintain the feed rate at the command value by controlling the swing cylinder 19 in feedback.

The saw speed command device 31 and the saw speed detector 33 are connected to the servo motor M, and maintain the saw blade speed a at the command Wi by controlling the motor M in feedback.

The operation of the bandsaw machine having the above configuration will be explained based on the O-chart in FIG. 3. Now, the microphone 35 is placed at a predetermined position, for example on the factory boundary line, and step 30
It is assumed that the above-mentioned time and allowable noise data and initial value data of high speed in each time period are inputted from the data input unit 23 in step 1, and the start switch is turned on in step 5302.

Step 303 is the cutting speed ηIW1 according to the time.
(Set aQ, bO, and noise tolerance value 1-o in the register, and proceed to step 307 through the judgment of step 304 to determine if the 11iG is off and the judgment process of step 306 to determine whether the current speed is abnormally low.) The commanded speed is output 4. If cutting is completed in step 304, a return to the origin is performed for the next cutting, and in step 306, an emergency stop is applied if the speed is abnormally low.

In Swing, 3.08, the current noise level is input via the microphone 35 and noise detector 25, and Swing 30
In step 9, it is determined whether the noise value [is greater than or equal to the allowable value Lo.

If it is determined that the noise @1 in the swing 309 is less than the allowable value Lo, the swing 310 separates the time period and moves to the subsequent step 303 or 304 (-1).

On the other hand, if the noise value is determined to be equal to or higher than the allowable value LO by the Su-7 Tsubu 309, this number of times is counted by the swing 311, and the count reaches the set value Col! When the cutting speed becomes f, that is, when the noise level continues to be equal to or higher than the allowable value 1-0 for a predetermined period of time, the cutting speed is set to a in step 313.
, b. ga instantaneously input to the microphone 35 by intervening step 312
8 will prevent you from accidentally slowing down.

The speed adjustment method adjusts the cutting speed (for example, 2%) at a predetermined ratio (for example, 2%).
This reduces the saw blade speed (a) or the feed rate (a). Alternatively, the next cutting speed may be determined using preset table data. As a result, the servo motor M and the swing cylinder 19 are driven with the new adjusted command values, the saw blade speed a and the feed speed l] become smaller values, and the noise level is reduced.

As described above, with the band saw machine of this example, R raw A! Since it is possible to automatically suppress the blue color to below the permissible value set in advance according to the time of day, it is possible to improve the factory environment and easily comply with the customer prevention ordinance. :Compatible with the system, and constant monitoring is not required, making unmanned operation possible.

In addition, since the cutting speed m is set to a low value (5.5 times), the cutting speed is reduced to a low value (h), so that the cutting rate is not extremely deteriorated, but the cutting quality and cutting efficiency are good.

Although the above embodiment has been shown as an example of a band saw machine equipped with a saw blade, the same applies to the case of a grindstone.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments by making appropriate changes in RH1.

[Effects of the Invention Song 1 As described above, the present invention provides a cutting section that is equipped with a noise R detection means and that can automatically reduce the cutting speed and suppress the noise below the allowable value when the cutting noise exceeds the allowable value. Since it is a machine, 1
The pumping environment can be improved, noise prevention 1 [easily compliant with regulations,
If the cutting rate is extremely deteriorated, f,'K<, unmanned operation is possible.

[Brief explanation of the drawing]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a system configuration diagram of a band saw machine implementing the present invention, and FIG. 3 is a flowchart of the cutting process of the band saw machine. 1... Q match detection means 3... Allowable value storage means 5... Cross comparison means 7... Cutting speed adjustment means Agent Patent attorney Tamotsu Miyoshi η

Claims (5)

[Claims] (1) A noise detection means for detecting noise generated due to cutting work, a tolerance storage means for storing a noise tolerance value, and outputs an adjustment command signal when the detected noise value exceeds the tolerance value. A cutting machine comprising a comparison means and a cutting speed adjustment means for adjusting the cutting speed to a smaller value based on the adjustment command signal. (2) The cutting machine according to claim 1, wherein the cutting speed adjusting means calculates the next cutting speed at a predetermined ratio based on the adjustment command signal. (3) The cutting machine according to claim 1, wherein the cutting speed adjusting means searches preset speed table data and sets the next cutting speed based on the adjustment command signal. (4) The comparison means outputs the adjustment command signal only when the detected noise exceeds a permissible value for a predetermined period of time or more.
Cutting machine as described. (5) The cutting machine according to claim 1, wherein the cutting speed adjusting means outputs an emergency stop signal when the next cutting speed becomes abnormally low.