JPH02136705A - Device and method for measuring hole shape of die - Google Patents

Abstract

PURPOSE:To simply and quickly measure length of a bearing part of a die hole and a cone angle of a reduction part by placing a die between a projector and a photodetector, and rotating it along an axis vertical to a die hole axis. CONSTITUTION:Between a laser projector 8 and a laser light receiving device 11, a rotary supporting device 14 is installed, and a die 1 for wire drawing being an object to be measured is supported so as to be freely rotatable by the device 14. In this case, the die 1 is supported by the device 1 so that an axis vertical to a hole axis of the die 1 and a rotation axis of the device 14 conform with each other. Also, a rotation axis 16 of a motor 15 is connected to a personal computer 18, and the computer 18 and a laser light measuring controller 12 are connected. In this state, a laser beam irradiates to the light receiving device from the projector 11, and also, by driving the motor 15, the die 1 is rotated along the axis vertical to its hole axis, by which length l of a bearing part (d) of a die hole 5 and a cone angle of a reduction part (c) are measured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a die hole shape measuring device and method thereof;
In particular, the present invention relates to a die hole shape measuring device that uses a laser beam to easily and quickly measure the hole shape of a wire drawing die, that is, the inner surface shape of the die hole, and a measuring method using this device.

[Conventional technology]

Metal wires such as stainless steel wires and heating wires with a diameter of 111 mm or less are generally manufactured by passing them through die holes for wire drawing, with a tolerance of less than a few hundredths of a millimeter. There is. By the way, the hole shape of the wire drawing die is
This affects the product quality of the metal wire produced and the life of the die.

For this reason, various devices and methods have been put into practical use for measuring the hole shape of the die, and the quality of the hole shape of the die is determined based on the measurement results.

This will now be explained with reference to FIGS. 4A and 4B and FIG. 5.

In FIG. 4, 1 is a die, 2 is its case, 3 is a reinforcing mount embedded in the case 2, 4 is a diamond die body supported by the reinforcing mount 3, and 5 is a die hole.

The die hole 5 of the die main body 4 will be explained in more detail with reference to FIG.
C is the exit section. Furthermore, the introduction part a is the entrance part (
The wire drawing section a is divided into a reduction section (1), a bearing section (1), and a back relief section (E). Further, the exit section C is called an eject section (force).

In the die 1 having the above configuration, what has the greatest influence on the quality of the metal wire and the life of the die are, in particular, the length of the bearing part (1) of the die hole and the taper angle of the ducting part (1).

Conventionally, to measure the shape of a die hole, the die hole 5 is filled with plastic, a mold is made, the molded plastic is observed under magnification using a projector, and measured to determine whether it is good or bad. There is.

Furthermore, methods such as those shown in FIGS. 6 to 8 have also been put into practical use to measure the taper angle of the reduction portions of the die body 4.

First, in the method shown in FIG. 6, the diagram shown in FIG. 6 is created from a projection diagram using an impression material in which the die hole 5 is molded. Next, from the upper end T1 of the bearing (1) to the introduction part a side,
Take the length of D or designed duct,
Let it be T2. And T1. Connect T2 and find the half angle α.

In the method shown in FIG. 7, the conical angle 2α of the reduction portion is directly measured using a microscope equipped with an eyepiece equipped with a protractor. This protractor consists of one reference line P1 and a freely rotatable measurement line P2, and measures the angle 2α by reading the position of the scale S on the measurement line P2.

The method shown in FIG. 8 uses a displacement indicator (
Using a microscope M equipped with a dial gauge, etc., focus on the upper end T1 of the bearing (1), and move the lens barrel by 0.5D.
Or, raise it by the length of the designed duct and take the focused point as T2. Then, the horizontal distance X between T1.72 is measured using an eyepiece with a micrometer, and the half angle α is calculated using the following equation.

X10.5D or X/L=tarzr Note that the scale of the eyepiece lens is corrected in advance using a calibration objective micrometer.

[Problem that the invention attempts to solve]

In the conventional example, the method of measuring the shape of the die hole by enlarging and observing the molded die hole 5 made of plastic using a projector takes time and the measured values also vary from person to person. The disadvantage is that variations occur.

In addition, the methods for measuring the taper angle of the reduction part of the die hole 5 shown in FIGS. 6, 7, and 8 require time and effort to make detailed measurements, and errors are likely to occur in the measured values. There are drawbacks.

The present invention was proposed in view of the above-mentioned conventional drawbacks, and
With a very simple device, it is possible to easily and quickly measure the shape of the die flower, especially the length of the bearing part as the inner shape of the die hole, and the taper angle of the ducting part. The present invention relates to a die hole shape measuring device and method capable of determining the shape of a die.

[Means for solving problems]

In order to achieve the above object, the present invention installs a laser projector and a laser receiver facing each other, connects the laser projector and the laser receiver to a laser beam measurement control device, and further connects the laser projector and the laser receiver to a laser beam measurement control device. The present invention is characterized in that a rotating support device for supporting a wire drawing die of the object to be measured is provided between the wire drawing die and the wire drawing die.

Furthermore, the present invention has a laser projector and a laser receiver installed facing each other, and connects the laser projector and laser receiver to a laser beam measurement control device, respectively.
Furthermore, the rotational axis of the rotational support device provided between the laser projector and the laser receiver is aligned with the axis perpendicular to the die hole axis, and the laser beam and the die hole axis are made parallel to each other. This method is characterized in that the flower shape of the die is measured by supporting the wire drawing die of the object to be measured.

[For production]

The die is supported by a rotating support device, and a laser beam is irradiated from the emitter to the receiver, and the die is rotated at a predetermined speed to measure the length of the bearing part of the die hole, the taper angle of the ducting part, and the like. can be measured.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a die hole shape measuring device and method according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a die hole shape measuring device according to the present invention, and FIG. 2 is a block diagram of the same device.

In the figure, 8 is a laser projector installed at one end of the support base 9, 10 is its light projector, and 11 is a laser receiver installed at the other end of the support base 9. The laser projector 8 and laser receiver 11 are each connected to a laser beam measurement control device 12.

This laser beam measurement control device 12 is an outer diameter measuring device that uses a laser beam, and is commercially available as an instrument for measuring the outer diameter of a cylindrical object. In the present invention, after measuring the outer diameter, the mode is changed. By switching, the inner diameter of a hole in a cylindrical object can also be measured.

Moreover, between the laser projector 8 and the laser receiver 11,
The object to be measured, for example, a cylindrical body, is placed so that its axis is parallel to the laser beam, and the outer diameter or inner diameter of the cylindrical body is determined by irradiating the laser beam from the laser projector 8 to the laser receiver 11. It can be measured by the laser beam measurement control device 12.

Therefore, in the embodiment of the present invention, a rotation support device 14 is installed between the laser projector 8 and the laser receiver 11, and the wire drawing die 1, which is the object to be measured, is rotatably mounted on the rotation support device 14. to support. In this case, the die 1 is supported by the rotary support device 14 such that the axis perpendicular to the hole axis of the die 1 and the rotation axis of the rotary support device 14 coincide with each other.

Furthermore, to explain more specifically, 15 is the support base 9
It is a motor installed on the top, 16 is its rotation axis, 1
7 is an arc-shaped die mount attached to the tip of the rotating shaft 16. The rotation shaft 16 of the motor 15 is provided perpendicularly to the axis of the die hole 5.

Further, the rotating shaft 16 of the motor 15 is connected to a personal computer 18 as shown in FIG. 2, and this personal computer 18 and the laser beam measurement control device 12 are connected.

The personal computer 18 has a monitor television 19
and a printer 20 are connected.

In such a configuration, while emitting a laser beam from the laser projector 8 toward the relaser receiver 11,
The motor 15 is driven to rotate the die 1 along an axis perpendicular to the hole axis of the die 1.
The length l of the bearing part (1) and the Taber angle of the reduction part (2) are measured.

By rotating the die 1 in this way, the length l of the bearing part (1) of the die hole 5 and the Taber angle of the reduction part (2) are measured.Next, we will explain this measurement principle. This will be explained with reference to FIG.

First, when a laser beam is applied parallel to the hole axis of the die 1, the hole diameter is measured. Next, move die 1 to motor 1
When it is rotated by the rotating shaft 16 of No. 5, the diameter of the hole through which it can be seen gradually becomes smaller, and the diameter d1 of the hole through which it can be seen is determined by the shape of the inner surface of the hole and the rotation angle. Therefore, the inner surface shape and dimensions of the die hole can be determined from the relationship between the hole diameter and the rotation angle.

Then, the measured values are sequentially sent to the personal computer 18.
It calculates the flower shape, outputs the concave shape, and saves the data.

Therefore, the inner shape and dimensions of the die hole can be calculated from the relationship between the rotation angle of the die and the diameter of the die hole.For example, the length l of the parallel part called the bearing part (1) can be calculated from the following equation. It will be done.

1=<D-d1/cos θ)/lan θD: Die hole diameter aX: Line-of-sight hole diameter θ: Die rotation angle By further rotating die 1 by θ1 by applying the above calculation formula, the taper of the reduction part can be adjusted. Angle can be measured. Note that the above measurement speed is a rotation speed of the rotating shaft 16 of the motor 15 of 180 degrees per minute.
Can be measured by rotating with force.

〔Effect of the invention〕

As explained above, according to the device and method for measuring the hole shape of a wire drawing die according to the present invention, the die as the object to be measured is placed between the emitter and the receiver of the laser beam measurement control device. By rotating it along an axis perpendicular to the die hole axis, it is possible to easily and quickly measure the length of the bearing part of the die hole and the taper angle of the ducting part, which are important for the hole shape of the die.

Therefore, it has the excellent effect that it is possible to very easily determine whether the hole shape of the die is good or bad.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a die hole shape measuring device according to the present invention, Fig. 2 is a block diagram of the device, Fig. 3 is an explanatory diagram showing the measurement principle, and Fig. 4 A and B are front views of the die. Figures and sectional views; Figure 5 is an enlarged sectional view of the die body in Figure 4B;
Figures 6, 7, and 8 show three conventional measurement methods, respectively.
It is an explanatory diagram showing an example. 1... Dice 4... Dice body 5... Dice hole 8... Laser emitter 11... Laser receiver 12... Laser light measurement control device 14... Rotation support bag, 1 degree position 15...Motor 16...Rotating shaft U...Reduction part Engineering...Bearing part.

Claims (2)

[Claims] (1) A laser emitter and a laser receiver are installed facing each other, and the laser emitter and laser receiver are each connected to a laser beam measurement control device, and the object to be measured is placed between the laser emitter and laser receiver. A die hole shape measuring device characterized in that it is provided with a rotating support device for supporting a wire drawing die. (2) A laser emitter and a laser receiver are installed facing each other, and the laser emitter and laser receiver are each connected to a laser beam measurement control device, and a rotating device is installed between the laser emitter and the laser receiver. The die for wire drawing of the object to be measured is supported on the support device so that the axis of rotation of the rotation support device and the axis perpendicular to the die hole axis are aligned, and the laser beam and the die hole axis are parallel. A method for measuring the shape of a hole in a die, the method comprising measuring the shape of a hole in a die.