JPH09196603A - Measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring apparatus capable of particularly automatically and readily measuring an inner diameter of a ring-shaped object to be measured with high accuracy by persons not requiring high skill as well as measuring an outer diameter thereof. SOLUTION: In a measuring device 1, a main table 4 and a slidable table 5 are provided on a long frame 3 movably in the longitudinal direction of the frame 3 placed on a machine base 2. Opposing contacting bodies 6, 7 are respectively built on opposing upper end sections of the main table 4 and slidable table 5. A measuring device 8 is provided on the machine base 2 such that a moving quantity of the slidable table 5 can be measured by a measuring means thereof. The frame 3 can be inclined by a displacement stand 10 so as to move back the slidable table 5. In a condition that the main table 4 is fixed to the frame 3 and the slidable table 5 is slidable, a ring-shaped object to be measured is loaded on the main table 4 and slidable table 5 such that both of the contacting bodies 6, 7 are placed inside the ring. The ring-shaped object to be measured is suspended to the contacting bodies 6, 7 of the main table 4 by virtue of self weight thereof and the slidable table 5 is moved back by virtue of self weight thereof, then a quantity of the movement of the slidable table 5 is measured by means of the measuring device 8 so that the inner diameter of the ring-shaped object to be measured is measured. When the frame 3 is inclined such that the side of the main table 4 is lowered, the outer diameter of the object to be measured can be measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring machine for a work piece, and in particular, a measuring machine capable of easily measuring the inner diameter of an annular object by simply placing it on the measuring machine without any skill. Regarding

[0002]

2. Description of the Related Art Conventionally, inner diameter measuring machines for automatically measuring the inner diameter of an annular work are well known. The basis is to insert two eccentrics into the ring of the object to be measured in parallel and vertical directions, and horizontally move one or two of these eccentrics in opposite directions to contact the two eccentrics. Since the inner diameter of the annular workpiece is between the opposing outer surfaces of the erosion piece, the horizontal movement amount of the erosion piece is measured by an appropriate measuring means. For example, Japanese Patent Publication 1-61163
No. 1 and 853-1613 are also the method of moving the contactor horizontally by the weight.

[0003]

In the method of horizontally moving the contactor with the weight as described above, a measurement error frequently occurs depending on how the object to be measured is placed on the measuring machine, and it is difficult to measure precision parts. There's a problem. That is, since the inner diameter of the ring is a diameter, the center line passing through the center and the moving direction line of the contactor moving by the weight must overlap. However, when the ring-shaped object is placed on the measurement plate, the center line of the ring-shaped object does not always overlap with the moving direction line of the contactor moving by the weight. Therefore, the object to be measured is difficult to move due to friction between the object to be measured and the measuring plate of the measuring instrument. When one contactor moves horizontally by the weight, the force causes the object to be measured to pull in the direction of the weight. The two corroders on the inner diameter of the ring-shaped object to be measured are attracting the ring-shaped object to be measured, and since the corroding element and the ring-shaped object to be measured have frictional force at the corroded portion, The ring-shaped DUT cannot be rotated only by pulling it, and unless it is manually placed in the correct position, the ring-shaped DUT remains in the incorrect position where it was initially placed on the measuring plate. Therefore, there is a problem that it is difficult to measure the true diameter.

[0004]

The present invention has taken the following technical means in order to solve the above problems.

A main stand and a slide stand are movably arranged in the longitudinal direction of the stand on a long stand on the A machine stand, and corroded bodies are respectively provided at upper end edges of the opposite ends of the main stand and the slide stand. Standing opposite to each other, a measuring instrument is installed on the rear machine base of the sliding base so that the measuring means can measure the amount of movement of the sliding base, and the main base is fixed to the frame and slides. With the table slidable, place the ring-shaped object under test on the main stand and the slide stand by positioning both the corroded bodies in the ring, and the slide stand can be retracted. Inclining, suspending the ring-shaped object to be measured by the weight of the corroded body of the main table and retracting the sliding table by its own weight, measuring the moving amount of the sliding table with a measuring instrument and measuring the inner diameter of the ring-shaped object. It consists of a measuring machine for measuring.

[0006]

According to the present invention constructed as described above, it has the following actions. That is, since the sliding table is tilted so that the sliding table can retreat, the ring-shaped object to be measured hangs by its own weight on the corroded body of the main table that is tilted in the sliding table direction on the mounting table. Naturally, the contact point of the ring-shaped object to be measured which is in contact with the corroded body of the main table is on the center line passing through the center of the ring-shaped object to be measured, and therefore the center line passing through the center of the ring-shaped object to be measured is automatically pedestal. It coincides with the inclination direction of the slide table, and coincides with the retreat direction line of the slide base. This is because the position of the ring-shaped object to be measured is determined by the gravity of its own weight without being constrained by other objects, and the positioning can be performed more accurately than manually adjusting it. After that, since the sliding table retreats by its own weight on the inclined frame, the corroded body of the sliding table corrodes with the contact point on the center line passing through the center of the ring-shaped object to be measured. The corroded body will be located at the diameter end of the inner diameter of the ring-shaped object to be measured, and since the measuring means of the measuring instrument measures and displays the moving amount of the sliding table as the sliding table moves, anyone skilled in the art can do so. The inner diameter of the annular measured object can be easily and accurately measured by simply placing the annular measured object on the measuring machine.

[0007]

Embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of the measuring machine, FIG. 2 is a front view of the measuring machine, and FIG. 3 is a left side view of the measuring machine. The measuring machine 1 has a pedestal 3 arranged on an upper surface of a machine base 2. A main table 4 and a sliding table 5 are arranged in series so as to be slidable in the longitudinal direction of the frame 3. Rod-shaped contact bodies 6 and 7 are vertically provided at the upper end edges of opposing ends of the main base 4 and the sliding base 5 at the width center portions of the bases 4 and 5, respectively. The sliding table 5
At the rear part (on the right side in FIG. 1), a measuring device 8 is arranged so that the moving amount of the slide table 5 can be measured by the measuring means 9.
In principle, the measuring device 8 and the measuring means 9 may be any, but in the figure, the measuring means 9 uses a displacement detector of a linear sensor that moves forward and backward following the forward and backward movement of the slide base 5. Reference numeral 8A on the upper surface of the measuring instrument 8 is a digital encoder, 8B is an on / off switch, 8C is a zero return switch, and 8D is an external output outlet. Inside the machine base 2, a constant temperature heat insulating device (for example, a thermostat, a steam heat insulating tool) (not shown) is arranged. Further, a displacement stand 10 is arranged below the machine base. The displacement stand 10 includes a shaft 10
The height of the stand 10 can be changed by rotating the stand 10B around A. When the left side is raised and the right side is lowered, the machine base 2 and the gantry 3 are slanted on the sliding table 5 side and inclined. Since 5 moves backwards and pushes the measuring means 9 rearward to displace it, the displacement amount is digitally displayed on the encoder 8A. In the above structure, the position of the main table 4 is slid in the longitudinal direction of the gantry 3 according to the size of the object to be measured, and the position is fixed by the fixing means 11. Next, the displacement stand 10 on the left side is set to a high position (it is set in advance only for measuring the inner diameter). The slide table 5 is moved forward to bring the front end surface into contact with the main table 4, the zero return switch 8C of the measuring instrument 8 is pressed to make the display of the encoder 8A zero, and the annular object to be measured A is placed on both the corroded bodies 6,7. When it is left stationary on the main table 4 and the sliding table 5 so as to surround the pedestal,
Since the ring-shaped object to be measured A is inclined to the direction,
The center line passing through the center of the inner diameter of the to-be-measured object A is always exactly perpendicular and slides on the pedestal 3 because it hangs on the corrosive body 6 of the main table 4 by its own weight no matter how it is hung on Sliding table 5
Since the sliding direction line of is also naturally along the vertical line, the annular object to be measured A is automatically set at the correct position, and the sliding table 5 is retracted by its own weight. It suffices that the annular object to be measured A is allowed to stand on the main table 4 and the sliding table 5. When the slide base 5 retracts, the measuring instrument 8 automatically detects the movement value of the slide base 5 and digitally displays it on the encoder 8A.

If a cord (not shown) is connected to the external output outlet 8D and the end of the cord is connected to a controller of a machine tool (not shown), such as an NC controller, to feed back the measurement value of the measuring instrument 8, the measured value is immediately fed. The object to be measured can be corrected and processed based on the measurement value of the measuring device 8. In addition, it can be connected to a displacement meter, interface, computer to calculate measured values and print out to create an inspection table. In addition, NC lathes, machining centers, resin molding machines, etc. can be controlled to process dimensions and molding dimensions. Can be corrected.

When the displacement stand 10 on the right side is raised to incline the pedestal 3 so that the main table 4 side is lowered, and the object to be measured is left standing between the main table 4 and the sliding table 5, the measurement is performed. The object to be measured comes into contact with the main table 4 by its own weight, and the slide table 5 also slides toward the main table 4 side due to its own weight and comes into contact with the object to be measured. Therefore, the displacement of the sliding table 5 is automatically measured by the measuring instrument 8. Can be measured. Therefore, anyone can easily and accurately measure the outer diameter of the object to be measured without requiring any skill. In this case, the object to be measured may be directly placed on the gantry 3 for measurement, or a stationary table of an attachment (not shown) may be provided.

The constant temperature keeping means is for keeping the main table 4 and the sliding table 5 and the object to be measured at a constant temperature in order to eliminate the deformation of the main table 4 and the sliding table 5 due to the temperature change and the resulting measurement error. It is a means. Therefore, it does not matter what. The present invention is not limited to this example, and design changes can be made. A ceramic film can be formed on the upper surfaces of the main table 4 and the sliding table 5. The corroded bodies 6 and 7 can be entirely made of ceramics, or the corroded surface can be made of ceramics. Although the gantry 3 is arranged on the machine base 2 as a ridge, it may be laterally oriented. The pedestal 3 has the main base 4 and the sliding base 5 arranged on the same straight line to keep the sliding base 5 from moving forward and backward on the same straight line. Any structure may be used, and the gantry 3 may also have a groove formed on the upper surface of the machine base 2, and the main table 4 and the sliding table 5 may be configured to slide along the groove. In that case, the machine base having the groove becomes the mount 3. The setting position of the measuring instrument 8 is not limited.

The present invention configured as described above has the following excellent effects.

A. By tilting the stand so that the slide table can be retracted, the ring-shaped object to be measured hangs on the erosion body of the main table under its own weight for accurate positioning automatically, and at the same time the slide table is also measured under its own weight. Since it automatically retracts toward the instrument, no skill is required, and anyone can easily and quickly perform accurate inner diameter measurement.

B. By tilting the pedestal so that the slide table can move forward, the object to be measured can be brought into contact with the main table under its own weight by simply placing the object to be measured between the main table and the slide table, and Also automatically advances and contacts the object to be measured by its own weight, so that no skill is required, and anyone can easily and quickly perform accurate outer diameter measurement.

C. Since the main stand and the sliding stand are on the pedestal and their upper surfaces are on the same plane, the measurement height of the measured object can be improved by simply placing the measured object on the main stand and the sliding stand. It can be kept constant.

D. Since a dial gauge, a linear sensor, an optical sensor, or the like can be used as the measuring instrument, the inner and outer diameters of the measured object can be measured with high accuracy.

E. Since the main stand can also be moved on the pedestal, by moving the main stand according to the size of the measured object, large and small measured objects can be measured by one measuring machine.

F. It is possible to easily measure thin objects and soft materials without applying excessive force.

G. Connect a displacement meter, interface, computer, etc. to the external output outlet of the measuring instrument,
Calculate the measured value and print it out to create an inspection table, or N
It is possible to directly control a C-lathe, a machining center, a resin molding machine and the like to correct the processing dimensions, molding dimensions and the like.

H. By providing a heat retaining means for cooling and heating on the machine base and keeping the object to be measured and the measuring machine at a constant temperature, the measurement error due to thermal deformation can be minimized.

[Brief description of drawings]

FIG. 1 is a plan view of a measuring machine.

FIG. 2 is a front view of a measuring machine.

FIG. 3 is a left side view of the measuring machine.

[Explanation of symbols]

 1 Measuring machine 2 Machine stand 3 Stand 4 Main stand 5 Sliding stand 6,7 Corroding body 8 Measuring instrument 8A Encoder 8B ON / OFF switch 8C Zero return switch 8D External output outlet 8E Power cord 9 Measuring means 10 Displacement stand 10A Axis 10B stand 11 Fixing means A Annular object to be measured

Claims (4)

[Claims] 1. A main stand and a slide stand are movably arranged in a longitudinal direction of the stand on a long stand on a machine stand, and a corrosive body is provided at upper end edges of respective opposing ends of the main stand and the slide stand. They stand upright opposite each other, and a measuring instrument is installed on the machine stand so that the measuring means can measure the amount of movement of the slide stand. The main stand is fixed to the frame and the slide stand is slid. In a state where it is possible, the annular object to be measured is placed on the main stand and the slide stand by positioning both the corroded bodies in the ring, and the slide stand is tilted so that the slide stand can retract. It is possible to suspend the ring-shaped object to be measured by the weight of the corroded body of the main table and retract the sliding table by its own weight, and measure the moving amount of the sliding table with a measuring instrument to measure the inner diameter of the object to be measured. Characteristic measuring machine. 2. The machine base is a machine base. 2. The measuring machine according to claim 1, further comprising a constant temperature heat-retaining device for keeping the object under measurement at a constant temperature while keeping the gantry at a constant temperature. 3. The measuring machine according to claim 1, wherein the measuring machine has a configuration in which the measured value output means is connected to a controller of a machine tool to directly control machining dimension correction. 4. A main stand and a slide stand are movably arranged in a longitudinal direction of the stand on a long stand on a machine stand, and a corroding body is provided at upper end edges of respective opposing ends of the main stand and the slide stand. Each of them is erected in an opposed manner, a measuring device is arranged on the machine stand so that the measuring means can measure the amount of movement of the slide stand, and the gantry is tilted so that the slide stand can move forward. With the table fixed to the frame and the slide table slidable, place the DUT still between the main table and the sliding table, and touch the main table with the DUT by sliding its own weight. A measuring machine characterized by advancing the sliding table by its own weight while contacting it, and measuring the amount of movement of the sliding table with a measuring device to measure the outer diameter of the object to be measured.