JPH0426407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a curved surface measuring device, and more particularly, the present invention relates to a curved surface measuring device, and more specifically, it measures the moving distance of a workpiece in one direction, for example, the horizontal direction, and the distance in the other direction, by means of detecting means that are displaced in two different directions. For example, the distance traveled in the vertical direction is measured, the two pieces of information obtained by the respective signals are compared with the reference information of the prototype that has already been stored, the deviation is found, and the deviation is calculated from the original with respect to the workpiece. The present invention relates to a curved surface measuring device that obtains information for correcting the curved surface as close as possible.

For example, in order to produce large quantities of the same product,
It is common practice to manufacture a large number of identical molds from a standard mold using methods such as copying or NC machining. In this case, it is particularly necessary to confirm after the fact whether the plurality of molds are made to have the same size and shape as the reference mold.
This is because unless the lid is the same size and shape, it will be difficult to produce a large number of the same product through mass production.

Conventionally, the following two methods have been adopted to determine whether a mold manufactured using copying or NC processing has the same dimensions and shape as a reference mold.

A thin plate is press-formed using the manufactured mold, and by visually checking the curved shape of this thin plate, it is indirectly determined whether the mold has the same dimensions and shape as the reference mold. do.

For example, using a scanning machine, place the manufactured press mold on a reference table, displace the scanning machine in the X, Y, and Z directions, and use the positional information obtained thereby to adjust the Determine whether the mold is the same as the reference mold.

However, the former method relies solely on the naked eye, and has the disadvantage that it is extremely difficult to accurately determine whether the manufactured press die is the same as the reference die. . In addition, in the latter method, the relatively heavy mold must be moved to a larger scanning machine, and the scanning machine itself is also quite large, so a large area is required to accommodate it. occupies space, and
The disadvantage is that it is extremely expensive.

Therefore, as a result of intensive research and efforts, the inventors of the present invention have installed a first measuring means capable of mainly measuring distances in the horizontal direction, such as a measuring roll, in the device, and a potentiometer. It incorporates a second measuring means that can measure the distance in the vertical direction like a linear scale, and uses this device to measure the distance between two points on the reference mold and the distance between the two points in advance. The height is measured and stored as information in a storage device, and when a new mold is manufactured based on this standard mold, the distance between the two points of the standard mold is The device is moved correspondingly, the distance between the two points and the height between them are measured, and this is compared with the information of the reference mold that has already been stored, and if there is no deviation in the information, a new one is added. It is determined that the mold manufactured in By applying or cutting to obtain the same shape as the reference mold, there is no need to use a judgment method that lacks accuracy, such as judging whether the molds are identical by visual inspection. Moreover, it is possible to obtain a measuring device that is large-scale, expensive, and does not occupy a significantly large installation area like a scanning machine, and does not require the movement of a mold during measurement, thereby solving the various problems mentioned above. It was discovered that the points were wiped out.

Therefore, the present invention is simple and easy to handle, and it is possible to accurately and inexpensively determine the identity of the shape of a reference mold and a mold manufactured based on this reference mold. To provide a curved surface measuring device.

In order to achieve the above object, the present invention includes first and second rotating bodies fixed to a measuring instrument main body through mutually spaced bearings, and the first and second rotating bodies being connected to an object to be measured. a first detection means that detects a horizontal movement distance by identifying two points separated on the curved surface by rolling the rigid body in contact with a curved surface; a second detection means that moves integrally with the first detection means and detects the distance between the vertical displacement height of the rigid body and the curved surface at a point that internally divides the two points during the movement; and a signal relating to the distance between the displacement height in the vertical direction and the curved surface detected by the second detecting means in correspondence to the detection signal relating to the horizontal movement distance of the object to be measured by the first detecting means. It is characterized by comprising: a storage means; and a display device for displaying the storage contents stored in the storage means.

Next, preferred embodiments of the apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a curved surface measuring device according to the present invention, which is suitably used to determine whether a mold manufactured by copying has the same shape as a reference mold. This curved surface measuring device 1
0 includes a body 12 extending in the horizontal direction and a grip portion 14 rising from the middle of the body 12 and extending in the vertical direction. The body 12 and the gripping part 14 are preferably constructed of an integrally molded product made of synthetic resin. In particular, the body 12 has a first base plate 16 extending in the horizontal direction and a second base plate 16 that abuts the base plate 16. and a substrate 18 (see FIG. 2).
As can be easily understood from the figure, the body 12
A rotary encoder 20 is mounted and held between the side wall portion 12a and the second substrate 18. The rotary shaft 22 of the rotary encoder 20 is connected to the second substrate 1.
8, and a rotor 24 is pivotally attached to the tip thereof so as to be sandwiched between disks 25. in this case,
If teeth 26 are formed at equal intervals on the peripheral edge of the rotor 24, the rotor 24 is prevented from sliding on the mold surface when it is rolled. A conductive wire 28 for deriving the pulses generated by the rotary encoder 20 passes from the rotary encoder 20 through the inside of the grip 14 and extends from the top thereof to the outside.

Next, the first
A through hole 30 is defined in the substrate 16, and bosses 32a, 32b are connected to bolts 34, 32b with this through hole 30 in between.
It is fixed by 36. On the other hand, a potentiometer 40 is arranged inside the casing that constitutes the gripping section 14 . A rod 44 is connected to the tip of the sliding contact 42 constituting the potentiometer 40, and a rod 44 is connected to the tip of the rod 44.
In this case, a detector 48 with a sharpened tip is fixed through the sliding contact 42,
The rod 44, the rod 46, and the detector 48 are always urged downward in the figure by a coil spring (not shown). Note that the rod 44 passes through the hole of the boss 32a and connects to the first substrate 16.
Therefore, the rod 46 passes through the boss 32b, and the detector 48 extends below the boss 32b.

Further, in the device of the present invention, a roller 50 is rotatably supported on the opposite side of the rotor 24 with the detector 48 in between. The roller 50 is held by a leg 54 via a shaft 52, and the leg 54 is held by the body 12 via a support member 56. In the figure, reference numeral 58 is a conducting wire for transmitting vertical position displacement information obtained by the potentiometer 40, and reference numeral 5
Reference numeral 9 indicates a bolt for temporarily fixing the rod 44 via the boss 32a.

Next, the signals obtained from the curved surface measuring device configured as described above are processed to form the curved surface measuring device 10.
Regarding the processing circuit for determining whether the mold measured by is the same as the reference mold
This will be explained along the diagram.

The output side of the rotary encoder 20 is the counter 6
0, and the output side of this counter 60 is connected to a first address counter 64 via a delay circuit 62. The output side of the address counter 64 is connected to the first storage circuit 6 via a first changeover switch 65.
6 and a second memory circuit 68. The output side of the pulse generator 70 is a second address counter 72,
They are connected to the first memory circuit 66 and the second memory circuit 68 via a second changeover switch 74, respectively. On the other hand, the output side of the potentiometer 40 is connected to the second memory circuit 68 of the first memory circuit 66 via an A/D converter 76 and a third changeover switch 78, respectively. Note that the output sides of the first memory circuit 66 and the second memory circuit 68 are connected to a display device 80.

The mold curved surface measuring device according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, in the reference mold 100 shown in FIGS. 4A and 4B, the measurement original position O point is specified by a distance b in the X-axis direction and a distance a in the Y-axis direction. Then, using the point O as the measurement original position, the curved surface measuring device 10 is used for points A, B, and C to obtain horizontal distance and height information as signals. That is, the device 10 is run while being gripped from the measurement original position O point. As a result, the rotor 24 and the rotor 50 rotate, and the detector 48, which is constantly pressed downward by a coil spring (not shown), is displaced according to the irregularities on the surface of the reference mold 100. Therefore, as the rotor 24 rotates, a predetermined number of pulses are generated from the rotary encoder 20, which are introduced into the counter 60 via the conductor 28, and the counter 60 receives the count number every 100 pulses, for example. is output to the delay circuit 62. Delay circuit 6
2, the signal related to the count number is introduced into the address counter 64 with a delay of a predetermined time by 2, and the address counter 64 outputs this as an address signal to the storage circuit 66, and the address P ₁ , P ₂ , P ₃ in the memory 66a is inputted to the address counter 64. Determine.

Meanwhile, the detector 48, which is displaced in the vertical direction by the rolling of the rotor 24 and roller 50 during this time, displaces the rod 44 in response to its own movement, and furthermore, the displacement of the rod 44 causes the sliding contact 42 to displace. Displace. That is, the displacement of the sliding contact 42 causes the potentiometer 40 to derive a corresponding analog output. This output signal is converted into a digital signal by an A/D converter 76.

Therefore, as mentioned above, the address counter 64
The address signal from potentiometer 4
The zero position signals H ₁ , H ₂ , H ₃ , H ₄ . . . are stored in the first storage circuit 66 via the changeover switch 78.
In other words, the position specified by the address counter 64
At P ₁ , P ₂ , P ₃ , P _{4 .} . . , information H ₁ , H ₂ , H ₃ , H _{4 .} . . related to the height detected by the detector 48 is sequentially stored in the memory 66a. In this way, positional information of the reference mold 100 in the vertical direction with respect to the horizontal direction is obtained.

Next, when many new metals are manufactured by copying using this reference mold 100 as a reference,
It is confirmed whether these molds 200 are manufactured in the same shape as the reference mold 100. In this case as well, a method similar to the method used for measuring the reference mold 100 is employed. That is, the reference mold 10
Mold 20 with a newly created measurement original position O point of 0
0, and from this point O to point A, point B,
The curved surface measuring device 10 is run to point C. At this time, the changeover switches 65 and 78 are previously switched to different contacts from the previous time. Therefore, similarly to the above, the output signal of the rotary encoder 20 is sent to the counter 6.
0, delay circuit 62, address counter 64, and address signals B ₁ , B ₂ ,
B ₃ , B ₄ ... are derived to the second storage circuit 68,
According to this address signal, potentiometer 4
Vertical displacement signals h ₁ , h ₂ , h ₃ , h ₄ . . . of 0 are sequentially stored in the memory 68a as signals related to height.

Next, read out the signals stored in this way,
The case of displaying on the display device 80 will be explained.

In the above configuration, the pulse generator 70
The address counter 72 outputs pulses at predetermined time intervals from the address P 1 to the address P ₁ of the memory 66a, for example, every 100 pulses.
According to P ₂ , P ₃ , P ₄ ..., the potentiometer 40
The signals H ₁ , H ₂ , and the height information detected by
output H ₃ , H ₄ . . . to the display device 80;
Display it as waveform information. Next, the changeover switch 74 is switched in response to this output signal H, and the signals h ₁ , h ₂ , h ₃ , h ₄ . . . are sent to the display device 8 in the same manner.
0, the deviation between the height signal H related to the reference mold 100 and the height signal h related to the mold 200 produced by copying can be visually recognized.

Therefore, when the positional information represented by the deviation signal via the signal h is higher than the positional information represented by the signal H, that part of the mold 200 is scraped off and the mold 200 is replaced with the reference metal. It can be modified to approximate the mold 100 as much as possible. on the other hand,
When the positional information represented by the deviation signal via the signal h is lower than the positional information represented by the signal H, overlaying is applied to that part of the mold 200;
This mold 200 can be modified to be as close to the reference mold 100 as possible.

Next, FIG. 6 shows another embodiment of the present invention. In this embodiment, the same reference numerals as in the previous embodiment indicate the same components.

In this embodiment, the first roller 50a and the second roller
The rollers 50b are arranged in a straight line, and the rotary encoder 20 is led out of the housing.

Since the first roller 50a, the detector 48, and the second roller 50b are arranged in a straight line and the rotor 24 is arranged parallel thereto, at least the rotor 24 and the rollers 50a, 50b Three point support is achieved. Therefore, even if the operator grips the grip part 14 during measurement, there is an advantage that the curved surface measuring device 10 itself can be run on the curved surface of the mold in a stable state without swinging.

As described above, according to the present invention, it is possible to obtain the difference in the curved surface of a newly manufactured mold to be measured with a reference mold as electrical information with an extremely simple configuration, and to compare it. Therefore, the newly manufactured mold can be made as close as possible to the reference mold. For this reason, not only is the quality uniformity of the final mass-produced products ensured, but the structure is extremely simple and can be manufactured at low cost.
Moreover, it is easy to operate, and in addition, the measurement itself can be performed accurately, so there is an advantage that a precise mold can be obtained.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments. For example, it is possible to use a linear scale instead of a potentiometer. Of course, various improvements and changes in design are possible without departing from the gist of the invention.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical front view of a curved surface measuring device according to the present invention, FIG. 2 is a partially cutaway vertical side view of the curved surface measuring device shown in FIG. 1, and FIG. 3 is a curved surface measuring device obtained from the curved surface measuring device. A block circuit diagram for processing and displaying signals. Figure 4 is an explanatory diagram for measuring the distance from the reference point of the mold to a predetermined point and the height therebetween. Figure 5 shows the reference mold and A graph showing the deviation from the mold to be measured, and FIG. 6 is a schematic bottom explanatory diagram showing another embodiment of the curved surface measuring device according to the present invention. 10...Curved surface measuring device, 12...Body, 14
... Gripping part, 16, 18 ... Board, 20 ... Rotary encoder, 22 ... Rotating shaft, 24 ... Rotor, 25 ... Disc, 26 ... Teeth, 28 ... Conductive wire, 30 ... Through hole, 32a, 32b...boss,
34, 36... Bolt, 40... Potentiometer, 42... Sliding contact, 44, 46... Rod, 48... Detector, 50... Roller, 52...
Shaft, 54...leg, 56...support member, 58...
Conductor, 59...Volt, 60...Counter, 62
...Delay circuit, 64 ...Address counter, 65
...Selector switch, 66, 68...Memory circuit, 7
0... Pulse generator, 72... Address counter, 74... Changeover switch, 76... A/D converter, 78... Changeover switch, 80... Display device, 100... Reference mold, 200... Mold.

Claims (1)

[Scope of Claims] 1. A first and second rotating body fixed to a measuring instrument body through bearings spaced apart from each other; and a first and second rotating body fixed to a measuring instrument body through bearings spaced apart from each other; a first detection means that detects the distance traveled in the horizontal direction by identifying two points separated on the curved surface by rolling in contact with each other; a second detection means for detecting the distance between the vertical displacement height of the rigid body and the curved surface at a point that moves integrally and internally divides the two points during the movement; means for storing a signal relating to the distance between the vertical displacement height detected by the second detecting means and the curved surface in correspondence with a detection signal relating to the horizontal movement distance of the object to be measured; 1. A curved surface measuring device comprising: a display device for displaying memory contents stored in a storage means; and a curved surface measuring device. 2. In the device according to claim 1,
The first detection means consists of a rotor and a rotary encoder connected to the rotary shaft of the rotor;
A curved surface measuring device in which the second detection means includes a potentiometer and a rod connected to a sliding contact of the potentiometer and in contact with the curved surface. 3. In the device according to claim 2,
A plurality of teeth are arranged in a row around the periphery of the rotor, while
The rod is a curved surface measuring device that has a sharpened detector at its tip that constantly presses into contact with the curved surface. 4. In the device according to claim 3,
A curved surface measuring device in which the rotor and detector are arranged in a straight line. 5. In the device according to any one of claims 1 to 4, the curved surface measuring device measures a curved surface that is supported at three or more points by a rolling element consisting of at least a rotor and two or more rollers. measuring device.