JPH01321302A - Plate thickness measuring method - Google Patents

Abstract

PURPOSE:To improve the measuring accuracy by measuring a reference value every time immediately before the plate thickness is measured, and stopping one probe after the other probe is stopped moving. CONSTITUTION:An air blow is supplied from upper and lower air nozzles 14, 24, so that upper and lower probes 13, 23 are cleaned. At the same time, the probe 23 is raised upwards by a lower air cylinder 22. Then, after the probe is completely raised, the probe 13 is lowered by an upper air cylinder 12. When the probes 13, 23 come into touch with each other, the probe 13 is stopped. At this time, a reference value is measured. Thereafter, the probes 13, 23 are opened and separated, and a plate 30 which is an object to be measured is inserted between the probes 13, 23. While the probes 13, 23 are being supplied with the air blow, the probe 23 is raised by the cylinder 22. After the probe 23 is in touch with the plate 30 and stopped, the probe 13 is lowered by the cylinder 12 to be brought in touch with the plate 30. Then, the plate thickness is measured. Accordingly, the measuring accuracy of the plate thickness can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for measuring the thickness of a hoop-shaped board.

(Prior Art) Japanese Patent Publication No. 60-79210 discloses a device for measuring the thickness of a plate by holding the plate between a pair of roller sensors.

(What the invention attempts to solve! IK1) However, such measurements have the problem that it is necessary to correct changes in the outer diameter of the roller due to roller wear, etc., and correction for expansion and contraction due to temperature of the roller holding member. .

The present invention has been proposed in view of the above, and its purpose is to provide a plate thickness measuring method that eliminates the need to correct changes in outer diameter due to wear and temperature changes.

(Means for Solving the Problems) That is, in the present invention, an upper prog and a lower prog each equipped with a sensor such as a linear gauge are separated by a distance greater than the thickness of the plate material, and A first opening step for supplying an air blow, a reference value side setting step for closing and contacting the opened prog, and a step for opening the prog closed by this reference value measuring step and supplying the air blow. A plate thickness measurement method consisting of a second opening step, followed by a plate thickness measurement step of sandwiching the plate material between the two prongs, wherein in both measurement steps, after one of the prongs stops moving,
The above objective is achieved by providing the function of stopping the movement of the other.

(Function) In the present invention, the reference value is measured every time immediately before the plate thickness measurement, and it is unnecessary to compensate for changes in the outer diameter due to wear of the prongs or for expansion and contraction due to temperature of the sensor holding member, and one of the prongs By stopping the movement of the other prong after the movement of the prong has stopped, the misalignment of the axes of both prongs is suppressed, and air blow is supplied to clean both prongs, thereby improving the accuracy of plate thickness values.

(Example) Figure 1 shows an example of the present invention, (I) shows the first opening process, (2) the reference value measurement process, (3) the second opening process, and indicates the plate thickness measurement process.

In the figure, 11 is an upper sensor such as a linear gauge, 1
2 is an upper air cylinder, and these upper sensors 11
And the upper air cylinder 12 is attached to the upper sensor holding member 10.

Further, the upper prog 13 is attached to the upper air cylinder 12 and is moved vertically by the upper air cylinder 12, but the upper sensor 11 and the upper prog 13 are always in contact with each other. Also, upper prologue 1
An upper air nozzle 14 is provided on the side of 3 to supply air blow to clean the upper prong 13.

The lower mechanism has the same structure as the upper part, and in the figure, 20 is a lower sensor holding member, 21 is a lower sensor attached to the lower sensor holding member, 22 is a lower air cylinder, 23 is a lower prong, 24 is a lower air nozzle.

Next, the operation will be explained.

As shown in FIG. 1 (+), the upper prog 13 and the lower prog 23 are separated by a distance greater than the thickness of the plate material. Air blow is supplied from the upper air nozzle 14 and the lower air nozzle 24, and the upper prologue 1
3 and the lower prog 23, the lower prog 23 is raised by the lower air cylinder 22, as shown in FIG. 1(2). Downward prologue 23
After completing the ascent and stopping, the upper air cylinder 1
2 lowers the upper prong 13, and both prongs 13
．． 23 is in contact with the upper prong 13.

Measure the reference value in this state.

After the reference value measurement is completed, both prongs 13.23 are opened, and the plate material 30, which is the object to be measured, is inserted between both prongs 13.23 (see FIG. 1 (3)).

While supplying air blow to the upper prog 13 and the lower prog 23, the lower prog 23 is raised by the lower air cylinder 22 and stopped after contacting the plate material 30,
Next, the upper air cylinder 12 causes the upper prologue 13 to
is lowered and stops after contacting the plate material 30. In this state, the plate thickness value is measured (see Figure 1 (4)).

In this way, a plate thickness value can be obtained from the reference value and the plate thickness value, which is independent of changes in the outer diameter due to wear of the prongs, etc., and expansion and contraction due to temperature changes of the sensor holding member.

FIG. 2 shows the operation of measuring the thickness of a hoop material.

FIG. 2(1) is a schematic diagram of a system including a hoop material 100, cutter upper and lower blades 104 and 105, an upper prologue 111, and a T-oblog 121. 101-103
is a guide for the hoop material 100. Further, 112 is an upper air nozzle, 122 is a lower air nozzle, and a sensor, an air cylinder, etc. are omitted.

In FIG. 2, the same operation as in FIG. 1 is performed.

That is, the hoop material 100 is cut with a canter, the cut material is discharged, and at the same time, the lower prog 121 moves upward and the upper prog 111 moves downward to bring them together to measure the reference value (FIG. 2 (2), (See (3)).

After the reference value measurement is completed, both prongs 111 and 121 are opened, as shown in FIG. 2 (4).

Regarding the insertion of the hoop material 100 between the two prongs 111 and 121, in order to have a degree of freedom in the length of the hoop material 100 to be cut, the hoop material 100 is inserted in a length equal to or less than the required length.
0 (see Figure 2 (5) and (6)), measure the plate thickness (see Figure 2 (7)), and calculate the remaining length up to the cutting length as shown in Figure 2 (9). Cut after sending (Fig. 2G (
See I).

By performing such an operation, the plate thickness can be measured within the conventional waiting time for feeding the hoop material 100, so that the time required for plate thickness measurement can be shortened.

(Effects of the Invention) According to the present invention configured as described above, ■ Since the reference value is measured every time immediately before the plate thickness measurement, it is possible to compensate for changes in the outer diameter due to wear of the probe and to compensate for expansion and contraction due to temperature of the sensor holding member. No correction is necessary.

(b) By stopping the movement of one prog after stopping the movement of the other, the misalignment of the axes of both prongs is suppressed, and air blow is supplied to clean both prongs, so the accuracy of the coffin thickness value Improvements will be made.

There are other effects.

[Brief explanation of the drawing]

FIGS. 1 (1) to (4) are explanatory diagrams sequentially showing the measuring method of the present invention, and FIGS. 2 (1) to (00) are explanatory diagrams sequentially showing the operation of measuring the thickness of a hoop material. 10... Upper sensor holding member 11... Upper sensor 12... Upper air cylinder 13... Upper prologue 14... Upper air nozzle 20... Lower sensor holding member 21... Lower sensor 22...・Lower air cylinder 23 ・Lower prologue 24 ・Lower air nozzle

Claims (1)

[Claims] A first opening step in which an upper prog and a lower prog, each equipped with a sensor such as a linear gauge, are separated by a distance greater than the thickness of the plate material, and air blow is supplied to both the prongs; a reference value measuring step of closing and contacting the prongs; a second opening step of opening the prongs closed by the reference value measuring step and supplying air blow; A plate thickness measuring method comprising a plate thickness measuring step in which the prongs are clamped, the method having a function of stopping the movement of one of the prongs after stopping the movement of the other in both the measuring steps.