JPH0260962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface roughness detection device, which detects irregularities on a surface to be lapped that is attached to a lapping machine for lapping the inner diameter of a cylinder, and after lapping, it measures the finished condition based on a scale. The object of the present invention is to provide a surface roughness detection device that can detect surface roughness.
For example, the surface roughness of the valve seat of the main steam isolation valve in a nuclear power plant can directly lead to the leakage of toxic fluids containing radiation, so high-precision surface roughness is required for parts that require a lap finish. As a result, the number of surface roughness corrections required to maintain accuracy requires repeated lapping and surface roughness measurements, and the lapping machine must be attached and detached many times for each task. The roughness of the lapped surface can be detected without removing the lapping machine from the lapped part. A surface roughness detection device was required.

The present invention has been made in view of the above-mentioned needs, and includes a device that is attached to a cylindrical inner diameter surface lapping machine, detects the unevenness of the surface to be lapped via a link mechanism, and observes the roughness of the detection surface from the outside of the lapping machine. This is a surface roughness detection device that can perform

An embodiment of the present invention will be described below with reference to the drawings. The drawings show a cylindrical inner surface lapping machine equipped with the apparatus of the present invention attached to a member to be lapped. The lapping machine 1 is connected to a rotating shaft of a drive source (not shown), and a gear 2 built into the lapping machine 1 and a gear 4 fixed to a rotating cylinder shaft 3 engage with each other to form a base. 5, the rotary cylinder shaft 3 is configured to rotate around a shaft 7 which is vertically installed at the axial center position of the fuselage via a vertical position adjustment mechanism 6, and is fixed to the lower end of the rotary cylinder shaft 3. The wrapped surface plate 8 is rotated above the lapped surface b of the lapped member a. The lap surface plate 8 includes the lap surface plate 8.
An endless belt 9 for lapping is provided as a lapping means and has a lapping portion exposed from the outer circumferential surface of the lapping surface and parallel to the surface to be wrapped. By contacting the surface to be lapped b and rotating the lapping surface plate 8 by the rotary cylinder shaft 3, the surface to be lapped b is lapped. The apparatus of the present invention installed on the wrapping machine 1 has a support 11 erected on the upper part of the outside of the wrap machine 1, and a dial meter 13 is mounted on the tip of a support arm 12 extending horizontally from the upper end of the support 11 to detect a sensing needle 13a. is fixed so that it operates vertically. The support arm 12 is the support 1
1, and the sensing needle 13a of the dial meter 13 is configured to move on the axis of the shaft 7 of the lap machine 1. The sensing portion bracket 14 fixed to the lower surface of the lap surface plate 8 has a sensing end 15 at one end, and a pivot portion 16a.
The sensing end 1 can swing freely around the fulcrum.
5 can be accommodated in a recess 8a formed in a part of the surface facing the lap surface b of the lap surface plate 8, and a lever member 16 with a coil spring 17 elastically loaded between the vicinity of the other end and the lap surface b 8. , a link mechanism 19 consisting of a connecting rod 27 and another lever member 18, the working end 18a of the lever member 18 extends to the axis of the lower end of the shaft 7. An interlocking pin 21 that protrudes from the lower end of the shaft hole 20 and comes into contact with the working end 18a is inserted into the shaft hole 20 bored through the shaft center of the shaft 7 so as to be freely inserted and removed from the upper end. A sensing needle 13a of the dial meter 13 comes into contact with the upper end 21a of the interlocking pin 21 protruding from the upper end by moving the dial meter 13 about the support 11.
Further, 22 is an angle meter, which includes a pulley 24 fixedly attached to a pointer shaft 23 extending from the pointer and the rotating cylinder shaft 3.
The pulley 25 fixed thereto has the same diameter and is rotatably connected by an endless belt 26, so that the position of the pointer of the angle meter 22 and the sensing end 15 correspond to each other. Further, it is preferable that the drive source is variable-speed and capable of generating rotation speeds suitable for detection operation rotation and lap operation rotation.

The surface roughness detection device constructed as described above can perform lapping on the surface to be processed b by the conventional operation by pulling out the interlocking pin 21 from the shaft 7 during the lapping operation. That is, the support arm 12
When the dial meter 13 is moved backward from above the shaft 7 and the interlocking pin 21 is extracted, the load on the interlocking pin 21 is removed, and the elasticity of the coil spring 17 causes the lever member 16 to move to the pivot portion 16a.
The sensing end 15 sinks into a recess 8a provided in a part of the surface facing the lap surface b of the lap surface plate 8, and the lap surface plate 8 is tilted at the same time as the endless belt for lapping 9 rotates. This rotation will not interfere with the lap work. Next, the wrapped surface b
When detecting the roughness of the lapping plate 8, rotate the vertical position adjustment mechanism 6 of the lapping surface plate 8 to separate the lapping endless belt 9 from the surface b to be wrapped, and insert the interlocking pin 21 into the shaft hole 20 of the shaft 7. The sensing needle 13a of the dial meter 13 is brought into contact with the upper end and the driving source is rotated for detection. In other words, interlocking pin 2
1 is inserted into the shaft 7, its own weight causes the sensing end 15 of the lever member 16 to come into contact with the lapped surface b via the link mechanism 19, and the rapping surface plate 8
By the relative movement of the lapped surface b, the unevenness of each part is sequentially linked to the sensing needle 13a of the dial meter 13 via the link mechanism 19 and the interlocking pin 21, and can be observed as the angular position of the pointer. At the same time, the angle meter 22 displays the angular position of the detecting section at that time, so that the roughness of each angular position of the lapped surface b can be known from both the meters 13 and 22.

As described above, when detecting the surface roughness of the lapped surface b, the apparatus of the present invention inserts the interlocking pin 21 into the shaft 7 and presses the interlocking pin without removing the lapping machine 1 from the lapped member a. Upper end 21 of 21
The sensing needle 13a of the dial meter 13 is brought into contact with the surface b of the dial meter 13, and the interlocking pin 21 is removed during the lapping process.
The process of attaching and detaching the lapping machine 1 is minimized during work such as checking the roughness of each part of the lapping machine, detecting uneven parts, and detecting the finished condition after lapping. As a result, accuracy can be improved. In addition, since lapping can be performed while constantly detecting the finish condition of each part, it is possible to uniformly finish the entire circumference of the surface to be lapped with the minimum amount of lapping, which increases the durability of surfaces to be lapped, such as valve seats. It becomes possible to make it grow. In addition, since the roughness and position of the surface to be lapped can be determined before the lapping operation, unnecessary lapping of parts is reduced and the work time is shortened, and at the same time, the detection device does not malfunction during the lapping operation and damage to the lapping surface is avoided. The effects of implementing the present invention are extremely large.

[Brief explanation of the drawing]

The drawing is a partially cutaway front sectional view showing an embodiment of a lapping machine for cylindrical inner diameter surface equipped with a surface roughness detection device of the present invention attached to a valve seat. 1... Wrap machine, 2, 4... Gear, 3... Rotating cylinder shaft,
5... Support plate, 7... Shaft, 9... Endless belt for wrapping (wrapping means), 11... Support column, 12... Support arm,
13... Dial meter, 15... Sensing end, 16... Lever member, 17... Coil spring, 19... Link mechanism, 21... Interlocking pin, 22... Angle meter, 24,
25...Pulley, 26...Endless belt, a...Lapped member, b...Lapped surface.

Claims (1)

[Claims] 1 A surface roughness detection device installed in a lapping machine that performs lapping finishing work on a surface to be lapped on the inner diameter of a cylinder by rotating a lapping surface plate that is equipped with a lapping means and is movable up and down, the lapping surface plate a sensing end that is provided in a recess formed in a part of the surface facing the surface to be lapped, so as to be able to move toward and away from the surface to be lapped, and is biased in a direction away from the surface to be lapped; An interlocking pin penetrates the shaft at the center of rotation of the surface plate so that it can be inserted and removed up and down, and one end is connected to the sensing end and the other end is in contact with the lower end of the interlocking pin, so that the sensing end is moved to the target by the load of the interlocking pin. A surface characterized by comprising a link mechanism that presses against the lapping surface, and a dial meter that is movably attached to the upper outside of the lapping machine and has a sensing needle that can move toward and away from the upper end of the interlocking pin. Roughness detection device.