JPH0749202A - Inspection device for cylinder accuracy - Google Patents

Abstract

PURPOSE:To undertake smooth and low cost inspection at a manufacturing site by providing a plurality of balances for converting the displacement of each probe, and a plurality of measuring instruments for measuring the displacement of the action plane of each balance. CONSTITUTION:A test piece is rotated at a constant peripheral speed on the operation of a motor M, thereby setting measuring instruments 74, 77 and 79 at a zero point. Then, a measuring object 200, instead of the test piece, is placed between rollers 2 and 3, and rotated at the same peripheral speed to find whether the accuracy of the object 200 is within an allowable range, with the first to third measuring instruments 74, 77 and 79. As a result, the dimensional accuracy of the wall thickness, inner diameter and outer diameter of the object 200 can be easily inspected along the entire surface thereof on the same straight line passing the axial centers of the roller 2 and the object 200, while the external surface of the object 200 in contact with the reference roller 2 being kept at the zero point. Also, the micro eccentricity of the inner and outer diameters can be immediately detected from the deflection of the pointers of the instruments 74, 77 and 79 by the concurrent measurement of three measuring points on the same straight line. An eccentric position can also be checked similarly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accuracy inspection device for inspecting the dimensional accuracy of a cylinder in comparison with a reference product (test piece).

[0002]

2. Description of the Related Art When checking whether or not a cylindrical body (measurement product) such as a metal bearing that requires an accuracy of about 0.001 to 0.01 mm is within an allowable error range,
It is necessary to bring the processed cylindrical products from the mass production site to the inspection room where electronic devices for precision measurement are installed. Therefore, the inspection is time-consuming and costly. In this case, it is extremely convenient if the operator can immediately detect whether or not the worker has a predetermined accuracy at the site of mass-producing the cylindrical body that requires the high accuracy. Further, the detection of the eccentricity of the cylindrical body is more troublesome than the accuracy detection of the diameter or the wall thickness, but it is desirable that the eccentricity can be detected at the same time.

[0003]

In the accuracy inspection for detecting the error of the cylinder, it is desirable that the inner diameter can be detected at the same time in addition to the detection of the outer diameter and the wall thickness. Further, if it is possible to easily detect the error value of the eccentricity of the inner diameter in addition to the detection of the finishing accuracy error, it is extremely convenient from the viewpoint of improving the quality of the product. An object of the present invention is to provide a cylindrical accuracy inspection device capable of easily detecting an error (value) in finishing accuracy of an inner diameter, an outer diameter and a wall thickness of a cylinder with one measuring device simultaneously on the same plane.

[0004]

A cylindrical precision inspection device of the present invention is a precision inspection device for an inner diameter of a measured product whose measuring surface is an inner circumferential surface of a cylinder, and one of which is arranged in parallel and which is a reference roller. And a measurement item rotating mechanism that rotates the measurement item mounted on the pair of rollers around an axis, and both of them are the same passing through the reference roller and the axis of the measurement item. One end side inner peripheral surface on the plane (reference surface), the other end side inner peripheral surface facing the one end side inner peripheral surface, and the other end side outer peripheral surface that is the outer peripheral surface of the other end side inner peripheral surface, A first balance that has a contactor and an action surface that come into contact with each other, the intermediate portions of which are rotatably supported, and that converts the displacement amount of each contactor into the displacement amount of each action surface at a predetermined magnification; Balance, and third
A balance, and a first for measuring the amount of displacement of the working surface of the first balance.
A measuring instrument; an interlocking mechanism that is displaced by linking to the working surface of the first balance; a second measuring instrument that is installed in the interlocking mechanism and that measures the amount of displacement of the working surface of the second balance;
And a third measuring device for measuring the amount of displacement of the working surface of the balance.

[0005]

The operation and effect of the present invention: A test piece having the same structure as the measured product is placed between a pair of rollers, and the first contactor and the second contactor are passed through the axes of the reference roller and the test piece. The test piece on the flat surface is brought into contact with the inner peripheral surface of the test piece so as to face it. Next, the roller is rotated to rotate the test piece at a low speed. At this time, when setting the pointers of the first measuring device and the second measuring device to the reference values, the guide values of the wall thickness and the inner diameter are set by checking whether or not they are within the allowable range. Next, the third contact is also brought into contact with the outer peripheral surface of the test piece on the reference surface, and the pointer of the third measuring instrument is set in the same manner. Next 1
Place the measurement product between the pair of rollers and operate it in the same way as the test piece to check whether the thickness, inner diameter and outer diameter of the measurement surface are within the permissible range with respect to the reference values with the 1st to 3rd measuring instruments. To detect.

In the present invention, since the second measuring instrument for measuring the displacement amount of the working surface of the second balance is installed in the interlocking mechanism which is displaced by linking with the working surface of the first balance, only the second measuring instrument is installed. Therefore, the inner diameter error can be directly detected and the efficiency is good. Also, errors in wall thickness and outer diameter can be detected at the same time, and since three points on the same plane that pass through the axes of the reference roller and the test piece are measured at the same time, the eccentricity and You can also check the eccentric position. In the inner diameter accuracy inspection apparatus according to the second aspect, since the balance is arranged in the up-down direction, it is not necessary to extend the horizontal direction long, the lateral extension of the apparatus can be prevented, and a wide installation place is not required. As a result, the product can be easily installed on the manufacturing site, and the inspection can be performed smoothly and at low cost.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The inner diameter accuracy inspection apparatus 1 of the present invention includes a base B horizontally installed on a surface plate or the like. In front of the base B, a pair of rollers 2 arranged in parallel with variable spacing,
A measurement product (processed product) rotation mechanism 100 having the number 3 is installed. A motor M for rotating at least one of the rollers 2 and 3 is attached to the measured article rotating mechanism 100. In this embodiment, the roller 2 serves as a reference roller, and the motor M rotationally drives only one roller 3 via the reduction pulley mechanism RP.

The reference roller 2 has a roller shaft as a reference shaft for measuring an error of a measured product, and the roller 2 is manufactured and assembled with the roller shaft with a high precision of 1/1000 mm. As will be described later, between the rollers 2 and 3, a measurement product 200 which is processed by a cylindrical metal or the like, which needs to have an inner diameter, an outer diameter and a wall thickness within a certain error range, and which is required to have an accuracy of 1/100 mm, or 1/1000 mm
The test piece T processed with the accuracy of is placed. The measurement item 200 or the test piece T is set by adjusting the position of the roller 3 so that the horizontal plane passing through the center thereof coincides with the axis of the reference roller 2, that is, is horizontal to the roller 2.

At the rear portion of the base B, the inner peripheral surface 201 and the outer peripheral surface 202, which are the processed surfaces (measurement surfaces) of the measurement product 200, which are rotating surfaces, are contacted, and the measurement surface and the reference surface of the test piece. Error amplification mechanism 3 for increasing the deviation (error) from
00 is installed. On the upper part of the amplification mechanism 300, a measurement device group 400 for detecting an error amplified by 10 times by the amplification mechanism 300 is installed.

The measurement item rotating mechanism 100 has a support base 10 for supporting the pair of rollers 2 and 3. Support stand 10
Is an inclined substrate 11 having an inclination of 15 degrees with respect to the horizontal,
It comprises high legs 12 and low legs 13 that support the inclined substrate 11 on the upper surfaces of the base B at the lower surfaces of both ends. On the upper surface of the tilted substrate 11, a fixed roller base 20 is fixed on the upper side (above the high leg 12 in the figure), and a displacement roller base 30 which can be displaced on the lower side is fastened. The pair of rollers 2 and 3 are rotatably mounted on the fixed roller base 20 and the displacement roller base 30, respectively. The inclination angle of the inclined substrate 11 is
The range of 15 to 45 degrees is desirable from the viewpoint of easy installation and removal of the processed product 200 between the rollers 2 and 3.

As shown in FIG. 3, a roller distance adjusting mechanism 500 for displacing the displacement roller base 30 is attached to the upper surface of the low leg 13. The inter-roller distance adjusting mechanism 500 includes a body 501 with a screw hole, which is fastened to the upper end surface of the low leg 13 at an inclination of 15 degrees, and is screwed into the screw hole so that the tip end contacts the end surface of the displacement roller base 30. It consists of the screw rod 502 in contact. For the screw rod 502, the fixing nut 50
3, 504 are fitted on the outside. The adjustment of the distance between the rollers 2 and 3 by the inter-roller distance adjustment mechanism 500 releases the fixing of the screw rod 502 by the fixing nuts 503 and 504, loosens the degree of fastening the low leg 13 to the inclined substrate 11, and This is performed by twisting the rod 502 and moving the displacement roller base 30.

On the upper part of the high leg 12, when the distance between the rollers 2 and 3 is adjusted according to the dimension of the measured article 200 or the test piece T, the dimension of the measured article 200 is detected and the distance between the rollers 2 and 3 is detected. An inter-roller distance measuring mechanism 600 for accurately setting the distance is provided. The inter-roller distance measuring mechanism 600 includes a stand 602 fixed to the front surface of the reference roller base 20, an upper end surface 601 of which is a horizontal plane, and a rotating arm which is pivotally supported about the center of the upper end surface 601 and rotates in the horizontal plane. 603, and a micrometer head 604 mounted vertically downward on the tip of the rotating arm 603.

The operation of the distance measuring mechanism 600 will be described with reference to FIG. A) A test piece T formed with high accuracy with an error of 1/1000 mm or less with respect to the standard dimension is placed between the rollers 2 and 3. (B) Next, for positioning, the screw rod 502 is operated to adjust the distance between the rollers 2 and 3, and the test piece T is set to a substantially proper position by the amount of division. C) The rotating arm 603 is rotated, the level of the upper end surface of the support shaft 2A of the roller 2 is measured by the micrometer head 604, and then the level of the upper end surface of the test piece T is measured. Measure H1. D) Since the radius R1 of the support shaft 2A is known by accurate measurement in advance, the screw rod 502 is finely adjusted so that the sum (H1 + R1 = H) of the two agrees with the radius R of the test piece T. As a result, in the test piece T, the horizontal plane passing through the center is
It is set so as to coincide with the axis of the reference roller 2.

The error amplifying mechanism 300 includes columns 31, 32,
And a cross member 3 erected on the upper ends of the columns 31 and 32.
It has a support bridge 3A composed of three, a first balance 4, a second balance 5, and a third balance 6 which are vertically supported by the support bridge 3A. On the lower surface of the middle portion of the cross member 33, an arm post 34,
35 and 36 project downward, and each arm post 34, 35, 36
Horizontal support shafts 37, 38, 39 project from the front surface of the lower end of the.

In the first balance 4, the second balance 5, and the third balance 6, the lower parts of the respective balances are the horizontal columns 37, 3 respectively.
It is rotatably supported by 8, 39 and rotates in a vertical plane.
On the front surfaces of the lower ends of the first balance 4, the second balance 5, and the third balance 6, there are horizontally pin-shaped contacts 42, 52, 62.
Is projected. In this embodiment, the first balance 4 is a wall thickness detecting balance, the second balance 5 is an inner diameter detecting balance, and the third balance 6 is an outer diameter detecting balance. Contacts 42, 52, 62
The rotating rollers 43, 53, 63 which are manufactured and assembled with a high precision of 1/1000 mm or less are attached to the front end of each.

As shown in FIG. 3, each of the rollers 43, 53, 63 has a left side inner peripheral surface in a horizontal plane whose side walls pass through the axis of the reference roller 2 and the axis of the test piece T (or the measurement object 200). , The right inner peripheral surface and the right outer peripheral surface are in contact with each other. On the side surfaces of the upper ends of the first balance 4, the second balance 5, and the third balance 6, working surfaces 44 and 5 are respectively provided.
4, 64 are provided.

On the upper surface of the cross member 33, a thickness gauge stand 71 for mounting a test indicator, which is a measuring instrument, an inside diameter gauge stand 72, and an outside diameter gauge stand 73 are attached. The thickness gauge stand 71 is fastened to the left portion of the cross member 33 and has a dial type test indicator 74, which is a first measuring instrument, attached to the upper end thereof.
The tip of the detection unit 7A of No. 4 is in contact with the working surface 44 of the first balance 4 for detecting the wall thickness.

The inner diameter gauge stand 72 is fastened to the right end of the cross member 33, and a key-shaped connecting member 76 is horizontally fastened to the upper portion thereof, and a pair of horizontal rails 75 are provided at the tip of the connecting member 76. , A rail member 78 having 75 is fastened and provided. On the rails 75, 75, an interlocking mechanism 8 that is displaced by being linked to the working surface 44 of the first balance (strictly speaking, the working point P of the detection unit 7A) is placed.

The interlocking mechanism 8 has the rails 75, 7 at both ends.
5, a horizontal T-shaped pulley base 82 having pulleys 81, 81, and a stand L fastened to a leg portion 83 of the pulley base 82.
Character bracket 84. At the upper end of the bracket 84, a second measuring unit for measuring the amount of displacement of the working surface 54 of the second balance is provided.
A dial type test indicator 77, which is a measuring instrument, is attached. The tip portion of the detecting portion 7B of the test indicator 77 is the working surface 5 of the second balance 5 for detecting the inner diameter.
Touching 4.

Further, horizontal arms 85, 85 having their ends connected by a connecting member are attached to the pulley base 82, and the end side portions 86, 86 of the horizontal arms 85, 85 are, as shown in FIG. A precision bearing 8 is provided at the upper end of the first balance 4 for detecting the wall thickness.
It is rotatably linked via 7. This allows
The pulley base 82 slides horizontally on the rails 75, 75 in conjunction with an action point P where the tip of the detection unit 7A contacts the action surface 44 of the first balance 4 for detecting the wall thickness. That is, the second
The test indicator 77, which is a measuring instrument, includes the measured product 2
Deviations from the reference values (set values by the test piece) of the left inner peripheral surface and the right inner peripheral surface within the horizontal plane passing through the axis of 00 can be detected. As a result, the error of the inner diameter of the measured product 200 can be directly detected by one measuring device.

The outer diameter gauge stand 73 is fastened to the left side of the inner diameter gauge stand 72 of the cross member 33, and has a dial type test indicator 79, which is a third measuring instrument, attached to the upper end thereof. 7
The tip of the detection unit 7C of 9 is in contact with the operating point 64 of the third balance 6 for detecting the outer diameter. The distance L1 between the center of each horizontal support shaft 37, 38, 39 of the first, second and third balances 4, 5, 6 and the center of each contact 42, 52, 62 is equal to each horizontal support shaft 37, 38. , 39 center and the respective detectors 7A, 7B, 7C
It is set to 1/10 of the distance L2 from the tip of the. As a result, the error detected by each roller 43, 53, 63 is 10
It is magnified twice and detected at the tips of the detection units 7A, 7B, 7C.

Next, the operation of the cylindrical accuracy inspection device 1 after the above-mentioned operation 2) will be described. E) Rotating rollers 43 of the contacts 42, 52, 62 of the respective balances 4, 5, 6 so as to contact the left inner peripheral surface, the right inner peripheral surface, and the right outer peripheral surface within a horizontal plane passing through the axis of the test piece T. ,
Set 53 and 63. F) The motor M is operated to rotate the test piece T so that the peripheral speed is 80 to 150 mm per minute. On this occasion,
Set the test indicators 74, 77, 79 to zero.

G) Next, the test piece T is removed,
The measurement product 200 is placed between the rollers 2 and 3, the motor M is operated and rotated at a peripheral speed of 80 to 150 mm per minute, and a test indicator 74 which is a first to third measuring instrument, Whether or not the accuracy of the measured product 200 is within the permissible range is measured by the deflection amount of the pointers 77 and 79. H) After the accuracy detection of a predetermined number of measurement products 200, the measuring device is adjusted by the test piece T.

As a result, the outer peripheral surface of the cylinder of the measurement product 200 in contact with the reference roller 2 is set as a zero point, and the cylinder is on the same straight line (synonymous with the same plane) passing through the axis of the reference roller 2 and the axis of the measurement product 200. It is possible to easily inspect the dimensional accuracy of the wall thickness, the inner diameter, and the outer diameter over the entire circumference (360 °). In addition, the simultaneous measurement of three measurement points on the same straight line makes it possible to
~ Test indicators 74, 7 which are the third measuring device
It is possible to immediately detect the minute eccentricity amount of the inner and outer diameters, which is extremely troublesome in the usual error measurement, from the deflection amount of the pointers 7 and 79, and the eccentricity position can be checked similarly.

In the above embodiment, the contacts 42, 52, 62 are provided at the lower ends of the first, second and third balances 4, 5, 6 and the action surfaces 44, 54, 64 are provided at the upper ends thereof. But
On the contrary, a contactor may be provided at the upper end and a working surface may be provided at the lower end. Further, the detection surface of the test piece T or the measurement product 200 with which the contacts 42, 52, 62 come into contact is not limited to a horizontal plane as long as it is on a plane passing through these axes and the axis of the reference roller 2. Further, the first, second and third balances 4, 5, 6 may be set horizontally or inclined.

[Brief description of drawings]

FIG. 1 is a front perspective view of a cylindrical accuracy inspection device.

FIG. 2 is a rear perspective view of a cylindrical accuracy inspection device.

FIG. 3 is a front view of a distance measuring mechanism.

FIG. 4 is a plan view of a cylindrical precision inspection device.

FIG. 5 is a plan view of a distal end portion of a horizontal arm.

[Explanation of symbols]

 1 Cylindrical accuracy inspection device 2, 3 Roller 4 1st balance 5 2nd balance 6 3rd balance 8 Interlocking mechanism 42, 52, 62 Contactor 44, 54, 64 Working surface 74 1st measuring instrument 77 2nd measuring instrument 79 Third measuring instrument 100 Measuring item rotating mechanism 200 Measuring item 300 Error amplifying mechanism

Claims (2)

[Claims] 1. A precision inspection device for an inner diameter of a measured product, wherein a measurement surface is an inner circumferential surface of a cylinder, and a pair of rollers arranged in parallel and one of which serves as a reference roller. A measurement item rotating mechanism for rotating the measurement item placed on a roller around an axis, and an inner peripheral surface on one end side, which is on the same plane that passes through the reference roller and the axis of the measurement item. It has a contactor and an action surface that come into contact with the inner peripheral surface of the other end facing the inner peripheral surface and the outer peripheral surface of the other end that is the outer peripheral surface of the inner peripheral surface of the other end, and the intermediate portion is rotatable. A first balance, a second balance, and a third balance, which are supported by, and convert the displacement amount of each contactor into the displacement amount of each working surface at a predetermined magnification, and the displacement amount of the working surface of the first balance. A first measuring device for measuring a force, an interlocking mechanism that is displaced by linking to a working surface of the first balance, A precision measuring device for a cylinder, which is installed in a moving mechanism and includes a second measuring instrument for measuring a displacement amount of the working surface of the second balance and a third measuring instrument for measuring a displacement amount of the working surface of the third balance. . 2. The first balance and the second balance according to claim 1.
A cylindrical precision inspection device, wherein the balance and the third balance are vertical balances that are pivotally supported by a horizontal support shaft and rotate substantially in a vertical plane.