JPS62132165A - Method and apparatus for marking end of clad material - Google Patents

Abstract

PURPOSE:To achieve a marking without depending on worker's experience, by scanning a clad material widthwise at 90 deg. to the advancing direction thereof with a probe type electromagnetic induction detector to detect and end border position between mother material and material to be joined. CONSTITUTION:A clad material 1 comprising a mother material 1a and a material 1b to be joined is conveyed with a roll 2 and scanned with a probe type electromagnetic induction detector 4 in across the width in the advancing direction thereof 1 to detect end border position between the mother material 1a and a material 1b to be jointed. The detector 4 is fitted with a probe position detector 9 to detect the position of the end border. A marking head 10 is arranged above the clad material 1 and adapted to follow the end border position. A loosening amount and a margin are added to the detected position according to the thickness of the material 1 to be joined and then, a marking is done with a marking head 10 on the clad material 1. Therefore, the border position between the mother material and the material to be joined can be detected accurately with a probe type electromagnetic induction detector thereby achieving a higher marking yields and saved labor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cladding material end marking method and apparatus for detecting and marking the boundary between a base material and a laminate material of a cladding material.

[Conventional technology]

It is common practice to measure the thickness of steel materials and cladding materials using ultrasonic thickness gauges and gamma ray thickness gauges, but these thickness gauges can also be used to measure the thickness of the cladding material base material and cladding material. At present, no method or device has been developed for detecting the boundaries of and marking them based on the detected values. This is because the above-mentioned thickness gauge does not measure well and it is extremely difficult to detect the boundary between the base material and the laminated material. Specifically, when trying to detect the boundary edge of a cladding material using an ultrasonic thickness gauge, the bond between the base material of the cladding material and the cladding material is extremely good, and the acoustic impedance of that part is almost negligible. It does not change. For this reason, it is impossible to detect the boundary edge using an ultrasonic thickness gauge.

Also, even if you try to detect it with a radiation thickness meter such as R-ray,
In this case, the detectable range is limited depending on the cladding ratio between the base material and the composite material, and the degree of difference in radiation absorption coefficient.
Also, the accuracy cannot be expected. Therefore, at present,
Depending on the experience and feeling of the worker, a certain width is added to the boundary and marked with plenty of leeway.

[Problem that the invention seeks to solve]

However, when attempting to mark the boundary between cladding materials by relying on the experience and intuition of the worker, there is a tendency to inevitably leave too much margin for cutting, considering the reliability and efficiency of the work.
Therefore, there is a problem that the yield rate decreases. In order to improve this yield rate, it is desirable to accurately detect the boundary position by some method, but in addition to the problems mentioned above, the thickness gauge may not be able to detect the boundary position depending on the material. , is unsuitable. As a result of studies, the inventors of the present invention have found that the probe-type electromagnetic induction detector can detect the boundary position regardless of the material, and have solved the above problem.

Therefore, an object of the present invention is to provide a method and apparatus for marking an end of a cladding material in response to the above-mentioned needs.

[Means for solving problems]

In order to achieve the object, the present invention uses a probe-type electromagnetic induction detector to scan in a direction approximately 90 degrees with respect to the traveling direction of the cladding material, and detects the end boundary position between the base material and the cladding material by the scanning. The present invention is characterized in that the detection position is detected, and the marking head is made to follow the detected position by adding a slack width corresponding to the thickness of the laminated material prepared in advance and a margin, and marking is performed.

The device includes a probe-type electromagnetic induction detector that detects the edge boundary between the base material of the cladding material and the cladding material, and a movement device that moves the detector along a direction approximately 90 degrees with respect to the direction of movement of the cladding material. a mechanism, a probe position generator associated with the moving mechanism and outputting the position of the detector based on a signal from the detector, and a marking head that marks a cladding material based on the signal from the detector; It is constituted by a head following mechanism that adds a slack width corresponding to the thickness of the laminating material prepared in advance and a margin to the output value from the probe position generator and causes the marking head to follow the result.

[For production]

Since the probe-type electromagnetic induction detector can detect the edge boundary position between the base material and the laminate material, the margin can be reduced. Furthermore, various materials can be handled by changing the frequency of the oscillator applied to the detector.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the mechanical configuration. A cladding material 1 consisting of a base material la and a laminate material 1b is conveyed by a conveyance roll 2, and the amount of conveyance is determined by a hole attached to the conveyance roll 2.
'Detected by cis generator 3.

Below the cladding material l, a probe type electromagnetic induction detector 4 is installed.
, 4 are arranged, and the detectors 4, 4 are configured to scan in the width direction of the cladding material 1 by a moving mechanism 5, assuming that the width direction is approximately 90 degrees with respect to the traveling direction of the cladding material 1. ing. The moving mechanism 5 is composed of a ball screw 6 and a guide rod 7 extending in the width direction of the cladding material 1, and a scanning motor 8 that rotates the goal screw 6. The round screw 6 has left and right reverse screws with the center as the border. Note that the moving mechanism 5 may be any hydraulic, compressed air, or other drive mechanism. The aforementioned detectors 4, 4 are screwed into their respective threaded portions and loosely fitted onto the guide rod 7. motor 8
With this rotation, the detectors 4, 4 move symmetrically to scan the cladding material f, but in consideration of efficiency, the scanning is always performed based on the presence of a predetermined cladding material boundary. It is desirable to keep it operational as much as possible. The control section for this purpose is comprised of a scan range setter 8a and a motor drive section 8b, as shown in FIG.

By the way, when the detectors 4, 4 detect the boundary between the base material 1a and the laminate material 1b, it is necessary to know the position. It is being This probe position detector 9 is designed to detect the rotational speed and angle of the motor 8, and includes, for example, a potentiometer, a Noculus generator, etc.

A marking spatula I''10.10 for marking is arranged above the cladding material 1.

These marking heads 10.10 are moved in the width direction of the cladding material 1 by means of tracking mechanisms 11.11 provided separately. The following mechanism 11.11 is supported by a support frame 12 located at the center of the device.
Feed screws 13, 13, guide rod 1 arranged parallel to them
4, 14, marking head following motors 15, 15 for individually rotating each feed screw 13, 13; Furthermore, motor 1
It consists of a control section for controlling rotation of 5°15. And each marking head 10, 10 has each feed screw 1.
3 and 13, and is loosely fitted into each guide rod 14 and 14, and is guided and moved to each marking position according to the control block shown in FIG.

To explain this control block sequentially, the moving mechanism 5
By ξ, both detectors 4, 4 are moved symmetrically, a boundary signal S is generated, which signal S is sent to the marking interval controller 16 and also to the probe position generator 17. In the probe position generator 17, the position of the detector 4 that outputs the signal S is known by the probe position detector 9, and the position is detected by the marking position servo device 1.
Output to 8. On the other hand, marking follow-up motor 15°15
is equipped with a head position detector 19 that detects the rotation and angle of the motors 15, 15, and the signal q output from the detector 19 is sent to the marking position generator 2.
It is input to 0. The marking position generator 20 outputs to the marking position servo device 18 the difference between the slack width and the allowance according to the thickness of the laminated material prepared in advance in response to the signal q. may be added to the generator). Here, the sag width will be explained. The sag width has a correlation with the thickness of the laminated material 1b, and is in a proportional relationship with the thickness t as shown in FIG. 3, although it varies depending on the material. There is some variation in this, and the upper limit is taken as the slack width W for the thickness t. Although the margin substitution shown in FIG. 4 is a small amount, it is determined appropriately by taking into account variations in thickness, mechanical errors, etc.

The marking position servo device 18 inputting these signals compares the signal from the probe position generator 17 and the signal from the marking position generator 20, and controls each marking tracking motor 15, 15 so that the difference is always zero. control. As a result, the marking head 10 moves to point P shown in FIG.

On the other hand, the marking interval controller 16, which manually outputs the signal St from the detector 4, shifts the signal S based on the signal from the pulse generator 3, and issues a marking command to the marking driver 21 for each preset noculus. . As a result, the marking position servo device 18 is synchronized, and the clad material 1 is marked. Continuous marking is also possible by controlling differently.

Although the detector 4 was not explained in detail in the above explanation, it can be configured as shown in FIG. 5. That is, the detector 4 includes a probe 41 that detects a boundary signal on the surface of the cladding material 1, an oscillator 42 that excites the probe 41t-frequency f, a balance circuit 43 that modulates the boundary signal, and an amplifier that amplifies the output of the balance circuit 43. 44, a phase shifter 45 that smooths the phase of the carrier wave of the oscillator 42, a synchronous detector 46 that demodulates the modulated wave by adding the carrier wave of the oscillator 42, and an F that removes high frequencies.
It consists of a wave generator 47, a zero cross detector 48 that detects the υ boundary using the output from the F wave generator 47 shown in FIG. be done. This method is generally called a carrier wave format, and since it is often used in measuring instruments, it seems that no explanation is necessary. The frequency f of the oscillator that excites the probe 41 in a slow motion varies depending on the material and thickness of the cladding material 1, but is between 2 kHz and 32 kHz.
z is considered to be a suitable rend. In the above explanation, we talked about marking the boundary edges in the width direction, but if you do the same thing in the longitudinal direction of the clad material by turning the material 900 degrees, you can mark the boundary edges in the same way as in the width direction. Marking can be done accurately.

〔effect〕

As explained above, according to the present invention, the boundary position between the base material and the laminate can be accurately detected using a probe-type electromagnetic induction detector, so marking can be performed without relying on the experience or feeling of the worker. , yield is improved and labor saving is possible. In addition, the excitation frequency of the detector can be changed, so an appropriate frequency can be selected depending on the material, and therefore marking can be performed regardless of the material.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a control block diagram for controlling the follow-up mechanism, and Fig. 3 is a graph showing the relationship between the thickness of the joining material and the sag width. , Figure 4 is a cross-sectional view of the clad material showing the marking position, Figure 5 is a block diagram showing the detector circuit, and Figure 6 is the relationship between the output wave of the F wave detector and the boundary position. It is a diagram. l... cladding material, la... base material, lb... laminating material, 4... probe type electromagnetic induction detector, 5... moving mechanism, 10... marking head, 11... Following mechanism. Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A probe-type electromagnetic induction detector scans in a direction approximately 90 degrees to the direction of movement of the cladding material, detects the edge boundary position between the base material and the cladding material, and A method for marking an end of a clad material, characterized in that marking is performed by following a marking head with a slack width corresponding to the thickness of the laminate material being prepared and an allowance. (2) A probe-type electromagnetic induction detector that detects the edge boundary between the base material and the cladding material, and movement that moves the detector along a direction approximately 90° with respect to the direction of movement of the cladding material. a probe position generator associated with the moving mechanism that outputs the position of the detector based on a signal from the detector; and a marking head that marks a cladding material based on the signal from the detector. , a cladding comprising a head following mechanism that adds a slack width corresponding to the thickness of the laminated material prepared in advance and a margin to the output value from the probe position generator to cause the marking head to follow. Material edge marking device.