JP3069516B2 - Dimension measuring device for simple transfer molds and mold-related parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the dimensions of a simple transfer type mold and mold-related parts, and more particularly to irradiating a laser beam on at least the mold surface and observing a laser spot formed on the mold surface. A laser length measuring device for measuring the distance to the mold surface is disposed movably at least above the mold along the mold surface, and measures the dimensions in the mold or between the mold and the mold-related parts. The present invention also relates to a device which is configured so as to be almost inseparable and conveyable.

[0002]

2. Description of the Related Art In recent years, mold cavities with high dimensional accuracy have been required in order to improve the quality of cast products by preventing the occurrence of casts and flashes. For this reason, it has been proposed to determine the quality of the cavity by measuring the dimensions of the molded cavity.
As one of the methods for measuring the dimensions of the mold cavity, the present applicant has previously disclosed a laser measuring device for irradiating a laser beam in a certain direction as disclosed in Japanese Patent Application Laid-Open No. Hei 7-260433. It proposes a method for performing measurement using the same, and at the same time, discloses an apparatus for realizing the measurement method. This device uses a conventional device that makes the moving member reciprocate in three dimensions using three mutually perpendicular motorized cylinders, while moving the laser length measuring device in three dimensions.
The dimensions are calculated based on the electric signal from the laser length measuring device.

[0003]

However, the apparatus constructed as described above is a special-purpose machine incorporated in one mold forming line so that it can be applied only to a mold passing through that line. However, the method cannot be applied to a mold molding line, and there is a problem of lack of versatility.
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simplified mold / mold-related component dimension measuring apparatus which is almost integrally formed and can be transported.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a dimension measuring device for a mold and a mold-related part according to the present invention comprises a horizontal screw mechanism operated by a servomotor to enable a vertical support member to be moved in a horizontal direction. A vertical screw mechanism mounted on a vertical support member and manually operated via a handle to enable the laser length measuring device to be able to move up and down, thereby making the entire device simple and lightweight and having an integral structure.
Ensure that the equipment can be easily transported to the required location.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. As shown in FIG. 1, a casting frame 3 with a built-in casting mold 2 is placed on a casting mold platen 1, and a dimension measuring device 5 is placed on an upper surface of the casting flask 3 via two mounting tables 4. Has been placed. In this dimension measuring device 5, a tripod member 7 for adjusting the parallelism between the horizontal support member 6 extending in the left-right direction and being transportable and the upper surface of the mold 2 is screwed to both ends. Thus, the horizontal support member 6 is tilted by expansion and contraction due to rotation of the tripod member 7. A lateral screw mechanism 8 extending along the lateral support member 6 is mounted via support members 9 and 10, and the right support member 10 is attached to a screw shaft 11 of the lateral screw mechanism 8. A servomotor 12 having an output shaft connected thereto is mounted.

A vertical support member 14 extending in a direction substantially perpendicular to the horizontal support member 6 is provided on a nut 13 of the horizontal screw mechanism 8 so as to be movable along the horizontal support member 6 and via a bracket 15. Vertical support member 1
4 is provided with a vertical screw mechanism 16 extending along the same. Two laser measuring devices 18 are mounted on a nut 17 of the vertical screw mechanism 16 via a mounting member 19 so as to face each other, and a handle is provided at an upper end of a screw shaft 20 of the vertical screw mechanism 16. 21 is fitted. The vertical support member 14 has a movable part that is a nut 17 of the vertical screw mechanism 16.
A linear scale 22 connected to the linear scale 22 for displaying the distance of elevation of the laser length measuring device 18 is mounted. The horizontal support member 6 includes a connector 24 for electrically connecting a cord (not shown) for transmitting an electric signal, which is connected to a controller 23 provided separately, to the servomotor 12, But, it is attached.

The controller 23 is configured as shown in FIG. That is, this controller 2
In 3, after the voltage signal from the laser length measuring device 18 is amplified by the amplifier 24, the voltage signal is amplified by the A / D converter 25.
The digital signal is converted from an analog signal and input to the microcomputer 26. Also,
When a signal for moving the vertical support member 14 by a required amount is input to the microcomputer 26, a required number of pulses are input from the pulse generator 27 to the AC servomotor drive 28 by a command from the microcomputer 26. The servo motor 12 is rotated by a required amount to move the vertical support member 14 by a required amount. When the servomotor 12 is driven, the amount of rotation is counted by a counter 29 and then input to the microcomputer 26. In the controller 23, reference numeral 30 denotes a digital input / output unit composed of switches, lamps and the like, and reference numeral 31 denotes a display device for displaying a set value of a moving distance of the laser length measuring device 18, a moving distance, and the like. In the drawings, reference numerals 32 and 33 denote the support members 9 and 1 respectively.
No. 0 are hanging members respectively attached.

Next, a procedure for measuring the dimensions of a required portion of the mold using the above-described dimension measuring device 5 will be described. First, as shown in FIG. The two mounting tables 4 are mounted on the cast flask 3 thus formed, and the dimension measuring device 5 is mounted on the mounting tables 4 via the suspending members 32, 33, and the like. After the connection to the connecting member 24, the tripod member 7 is appropriately adjusted to obtain the degree of parallelism of the lateral support member 6 with respect to the upper surface of the mold 2. Thereafter, for example, when measuring the horizontal dimension of the cavity of the mold 2 shown in FIG. 1, the handle 21 of the vertical screw mechanism 16 is manually rotated forward and backward as appropriate to rotate the mold 2 of the laser length measuring device 18. The height with respect to the casting flask 3 and the like is appropriately adjusted.
After inputting the approximate moving distance, the start button 30 is pressed.
Then, the servo motor 12 is driven to operate the laser length measuring device 1.
8 is appropriately moved above the mold 2 and the casting flask 3 with the vertical support member 14 and the like, and the dimensions of the cavity and the like of the mold 2 are measured as described below.

That is, FIG. 3 is an enlarged detailed view of a main part.
As shown in the figure, the laser emitting unit 51 of the right laser measuring device 18 is connected to the cavity 52 of the mold 2 whose dimensions are to be measured.
Of the corner portions, the laser beam 54 is applied to the inner surface side of the first corner portion 53 by inclining at an appropriate angle, followed by irradiating the surface of the mold 2 with the laser beam 54 from the laser emitting portion 51 of the laser measuring device 18, A laser spot 55 of an optical mark formed by the laser beam 54 on the mold 2 is observed by a light receiving unit 56 of the laser length measuring device 18. Under this condition, in FIG. 1, the laser measuring device 18 is moved to the left,
The laser spot 55 is observed by the light receiving unit 56.
In this case, the laser length measuring device 18 includes a laser emitting unit 51.
Is inclined at an appropriate angle to the inner surface side of the first corner portion 53 among the corner portions of the cavity 52 whose dimensions are to be measured.
Even when the vertical plane at the position of the first corner 53 of the mold cavity 52 is almost 90 degrees, the laser spot 5
5 can be formed accurately. Thus, this observation is made continuously every moment. This observation result is recorded by a recorder (not shown) and displayed on the display device 31 in xy coordinates.

The first corner portion 5 of the measured values thus obtained
Any two measurement values in the horizontal plane 2a as the first measurement plane based on the measurement values according to 3 are displayed by xy coordinate values, and a relational expression between the two coordinate values is expressed by a least square method or the like. One straight line is derived as an equation by a regression equation or the like, and in the same manner, arbitrary two measured values in a vertical plane 2b as a second measurement plane forming a corner with the first measurement plane are obtained. The relational expression relating to the xy coordinate values is derived as an expression of one straight line by a regression equation such as a least square method or the like, and the intersection of these two straight lines is calculated as the first corner position.

Next, the servo motor 12 is operated to move the left laser measuring device 18 to the vicinity of the second corner 57 (see FIG. 1), in the same manner as the method of measuring the position of the first corner 53 described above. Then, the position of the second corner 57 is measured. Next, the microcomputer 26 calculates the length between the position of the first corner 53 and the position of the second corner 57. Thus, the dimensions of the desired position of the cavity 52 can be measured.

In the above embodiment, the dimensions of the concave cavity 52 are measured. However, after the servomotor 12 is operated to move the laser length measuring device 18 to the vicinity of the island 58 of the mold 2, the handle 21 The laser length measuring device 18 is moved up and down by the rotation of the linear scale 22 to raise the height of the convex island portion 58.
Can also be measured. In the above embodiment, the dimensions of the mold 52 and the island portion 58 of the mold 2 are measured. However, a V-groove is formed on the surface of the mold 2 or the upper surface of the casting frame 3 and the like, and the V-groove is formed. The length between the first corner and the second corner is measured, or a V-groove is provided in the core set in the mold 2 so that the V-groove of the core and the V-groove of the mold 2 can be measured.
The length with the groove may be measured.

In the above embodiment, two laser length measuring devices 18 are provided. However, the direction of the laser length measuring device 18 can be reversed when measuring the position on the opposite side. It can be individual. Further, the tripod member 7 and the level 25 may be omitted.

[0014]

As is apparent from the above description, the present invention is directed to a horizontal support member which extends in the horizontal direction and can be transported, a horizontal screw mechanism mounted on and extending along the horizontal support member, A servomotor mounted on a member and rotating the screw bar of the horizontal screw mechanism in the forward and reverse directions, and a cord for transmitting an electric signal mounted on the horizontal support member and connected to a separately provided controller 23 are connected to the servomotor. An electrical connector, a vertical support member attached to a nut of the horizontal screw mechanism, configured to be movable along the horizontal support member, and extending in a direction substantially orthogonal to the horizontal support member; A vertical screw mechanism attached to the member and extending along the same, a handle fitted to an upper end of a screw shaft of the vertical screw mechanism, a laser length measuring instrument mounted on a nut of the vertical screw mechanism, And a linear scale attached to the vertical support member and connected to the vertical movable member to display the movement distance of the laser length measuring device, so that it can be transported because it is almost inseparably configured, ,
It has excellent effects such as being versatile and being able to be applied to various molding lines accurately.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a block diagram of a controller that operates the apparatus shown in FIG.

FIG. 3 is an explanatory diagram for explaining an operation of the laser length measuring device.

[Explanation of symbols]

 Reference Signs List 6 horizontal support member 8 horizontal screw mechanism 11, 20 screw shaft 12 servo motor 14 vertical support member 16 vertical screw mechanism 17 nut 18 laser length measuring device 21 handle 22 linear scale 23 controller 24 connector

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-260433 (JP, A) JP-A-7-146117 (JP, A) JP-A-7-146116 (JP, A) JP-A-2- 299765 (JP, A) JP-A-8-101018 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22C 9/00 G01B 11/00-11/30

Claims (1)

(57) [Claims] 1. A laser length measuring device for irradiating a laser beam on at least the mold surface and observing a laser spot formed on the mold surface to measure a distance to the mold surface, at least above the mold and along the mold surface. A device that is movably arranged to measure dimensions in the mold or between the mold and the mold-related parts, and is configured to be almost inseparably configured and conveyable, and that extends in the horizontal direction and is conveyable. A lateral support member 6, a horizontal screw mechanism 8 mounted on and extending along the horizontal support member 6, and a servo mounted on the horizontal support member 6 and rotating the screw shaft 11 of the horizontal screw mechanism 8 in forward and reverse directions. A motor 12 and a connector 24 attached to the lateral support member 6 and connected to a separately provided controller 23 for electrically connecting a cord for transmitting an electric signal to the servomotor 12; A vertical support member 14 mounted on a nut 13 of the horizontal screw mechanism 8 so as to be movable along the horizontal support member 6 and extending in a direction substantially orthogonal to the horizontal support member 6; A longitudinal screw mechanism 16 mounted on and extending along the longitudinal screw mechanism 1;
6, a handle 21 fitted to the upper end of a screw shaft 20, a laser length measuring device 18 mounted on a nut 17 of the vertical screw mechanism 16, and a handle 21 of the vertical screw mechanism 16 mounted on the vertical support member 14. A linear scale 22 connected to a nut 17 for indicating a distance of elevation of the laser length measuring device 18;