JPS6296811A - Mounting type surface-roughness measuring machine - Google Patents

Abstract

PURPOSE:To make it possible to provide stable attitude, by fixing a stand adapter to a rear plate, holding the adapter with a stand jig such as a magnetic stand, thereby aligning the tracing plane of a probe and a main body. CONSTITUTION:The mounting surface of a work for a measuring machine is complicated and has large irregularities. Sometimes, the work is a small part. Sometimes a surface to be measured is located in a deep hole and is relatively thin. In such circumstances, a stand adapter B is fixed to a rear plate 3 of a main body A of the measuring machine with screws and the like. A supporting rod 101 of the adapter B is held with a holding arm of a stand jig such as, e.g., a magnetic stand. Thus, the main body A of the measuring machine is supported and fixed with the stand jig S through the stand adapter B. Therefore, the supporting attitude is aligned with the surface to be measured of the work, and a probe 4 is contacted with the surface to be measured. Tracing is carried out in this state, and the stable, accurate measurement can be performed.

Description

[Detailed Description of the Invention] Field of Application> The present invention is useful for measuring the roughness of, for example, the surface of a large limb measurement object (workpiece) or the surface of a plate-like object, by placing it on the workpiece. The present invention relates to a surface roughness measuring device that is small and lightweight and portable.

<Prior Art> A surface roughness measuring machine is provided as a device for measuring minute irregularities on the surface of a workpiece, so-called surface roughness. This type of measuring machine is very densely constructed in order to measure and detect micron-level irregularities on the surface of a workpiece, and the environment in which it can be used is currently restricted. However, compositionally,
Roughly speaking, there is a table on which a workpiece is stably placed, a column erected on the table, a drive body attached to the column so as to be movable up and down, and a drive body extending and supported from the drive body to trace the surface of the workpiece. It is equipped with a measuring head consisting of a stylus, which is installed on a vibration isolation table, and a drive mechanism inside the drive main body and a measuring head consisting of an external power supply and a measuring quantity calculation display + 'PHiη flitted. It is used by connecting the display to the signal cable.

With the conventional measuring rock mentioned above, only the stylus part of the probe comes into contact with the workpiece, so when measuring the waviness or straightness of the workpiece, the direction in which the stylus traces should match the tracing surface of the workpiece. In this way, a reference guide for guiding the moving direction of the probe is provided in the drive main body to match the inclination of the workpiece surface with the tracing direction.

In addition, if the workpiece is large enough to be placed on a table, the workpiece is placed directly on the table and measured, but for large items that cannot be placed directly on the table,
It is used to cut out a part of the workpiece and place it there, or to transfer the part necessary for measurement and measure it indirectly.

<Problems to be solved by the present invention> In terms of the accuracy of the device, the conventional measuring device described above must be used in a place with a controlled environment such as a so-called measurement room or inspection room, and it cannot be used on the production line site. It was extremely inconvenient for simple use. Since this is a mechanism that enables the extraction of various measured values, the mechanism becomes complicated, coupled with the need to maintain accuracy, and the dimensions of the measuring device itself become large, making it unsuitable for quick and easy use in the field. is also a factor.

In addition, in the case of large workpieces that cannot be placed on the table of the measuring machine, it takes time to prepare for measurement as mentioned above, and special dimensional jigs are also required. Regarding preparation, adjustment, etc., there were still many points that needed to be improved in terms of practicality.

Means for Solving the Problems> The present invention has been provided in view of the above-mentioned conventional problems, and aims to mainly detect average roughness, which is the easiest to use as measurement information at production sites. , a pickup equipped with a stylus that traces the work surface to detect roughness displacement, a converter that converts the displacement into an electric signal, and a skid that cancels the waviness component of the work surface is driven back and forth in a prismatic casing. For this reason, the drive motor shaft slides parallel to the feed screw shaft of the coaxial system, and the drive 8 is equipped with a pickup mounting section! This surface roughness measuring device is equipped with a structure and outputs the electric signal to an external display device via a signal cable, and both ends of the casing are closed by a front plate and a rear plate, and the front plate has a A main body is formed with an opening into which the pickup is loosely inserted, and the pickup is movable relative to the casing, and a mounting plate and a frame plate are integrally attached to the rear plate of the main body. By comprising a support rod that is provided and held by the arm of the stand jig, and a stand adapter formed by the stand jig,
In addition to making the measuring machine as a measuring operation part smaller and lighter, and making it possible to touch a workpiece by hand and making it easier to use on the production line due to simple and quick operation, it is especially important to make it easier to use on the production line site. Even when measuring a workpiece that is difficult to place on a measuring machine, such as a workpiece surface with a complicated uneven shape, it can be stably contacted and used.

(For use) Place the bottom of the measuring machine on the workpiece so that the stylus of the measuring machine contacts the measuring part of the workpiece, and then turn on the drive switch on the drive control source side connected to the signal cable. If this is done, the pick knob connecting the stylus will slide a predetermined distance in the axial direction by the drive mechanism inside the main body, and at this time, the stylus will trace the surface of the workpiece and its displacement will follow the irregularities. Perform the action.

This displacement action causes a built-in transducer to generate a predetermined electrical signal and output it to an external display connected via a signal cable, thereby displaying the measured roughness.

During this measurement work, if the surface of the workpiece that comes into contact with the measuring machine is flat, the bottom of the measurement surface will come into contact with the flat part of the workpiece, and the touch and main body will be in a stable state. In addition, if it is difficult to perform the above measurement by contacting the workpiece with the measurement result, attach a stand adapter to the rear plate and attach the adapter to a stand such as a magnetic stand. By gripping it with a jig, it can be stably supported in space, and it can take a stable posture by aligning the tracing surface of the stylus with the main body.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described based on the drawings. In FIGS. 1 to 4, reference numeral 1 denotes a casing of a measuring main body A, which is formed into a prismatic shape and whose both ends are closed with a front plate 2 and a rear plate 3. The front plate 2 side is detachably connected to a drive mechanism inside the casing, which will be described later, and a chain plate 2 is loosely inserted into the front plate 2 so as to be able to swing freely. Bi-cup-up 6 in which the measurement part protrudes outside the casing, and /- to protect the measurement part.
7 pieces are provided. 8 is a signal cable extending from the rear plate 3 side to the outside of the casing, and the -i side is connected to the signal rods 6a and 6IL from the pickup 6 inside the casing, the motor part of the drive mechanism, etc.
On the other end side, there is a power source j1 that processes the big amplifier signal and supplies electricity and light to the drive motor, etc. of the measurement main body A, as well as the function fT-display groove that displays required roughness data etc. Connecting terminals (not shown) for display devices (not shown) equipped with
A connector 9 connected to the connector 9 is connected to the connector 9.

In addition, the Af face plate 2 and the rear face plate 3 have side dimensions slightly larger than the cross-sectional side length of the casing 1 (vertical dimension in FIG. 3), and their base sides 2a, 3a
The end portion of the casing is closed by arranging the casing so that its side slightly protrudes from the bottom surface of the casing. 2b, 3b
is a square notch formed in the center of the bottom sides 2a and 3a of the front plate 2, the rear surface, and the plate 3, and therefore, a flat part and a square notch are formed on the bottom sides.

FIG. 2 is a perspective view showing a preferred shape of the stand adapter B to be attached to the rear plate 3 during use, which will be described later.
and a support rod 101 protruding from the center of the mounting plate, forming a substantially studded V-bottle shape. 102 is! @4 As shown in Figure 4, it is a recessed part that allows the signal cable 8 extending from the rear plate 3 to be avoided when it is attached to the rear plate 3, and 103 is similarly attached to the rear plate 3. This is a mounting hole for fixing screws.

FIG. 3 shows the Vt structure inside the casing 1.

In the figure, 10 is a drive motor, and the reducer 11 and mounting T) absorb some eccentricity caused by errors and drive the motor. I!
A feed screw shaft 13 is coaxially connected via a flexible coupling 12 for IJ transmission. 14 is a feed nut that is screwed onto the feed screw pongee 13 and is movable in the direction of the screw axis, and the nut has a slide shaft 15 that moves in a direction parallel to the screw shaft. The slide shaft 1 is supported and integrally fixed to the
5 is connected to one end of the slide shaft 15 via a joint block 16 and a plate spring 17 when the pink-up 6 is not connected.
Big amplifier connecting rod 1 that is approximately parallel to and extends in the same direction as
8 is attached so that it can swing. The slide shaft 15 is disposed so as to be movable substantially parallel to the bottom surface of the casing, specifically, to an imaginary plane formed by opening the bottom sides 2a and 3a of the front plate 2 and rear plate 3. Big amplifier connecting rod 18
, a mounting hole is formed on the tip side into which the number N cables 8 and 4B are removably inserted.
Contact points (not shown) of number rods 6a and 6λ are provided.

As is clear from the above description and FIG. 3, the slide shaft 15 and the big-up connecting rod 18 have a U-shaped mooring shape, which allows the drive including the motor, etc. 1
! /J This is to prevent the mechanical part from becoming longer and therefore the main body from becoming longer. Furthermore, since the connecting rod 18 can be swung by the leaf spring 17, when the connecting rod 18 is formed of one piece as the U-shaped integral shape, its inverted and bent ends (
It is clear that the U-shaped bottom part) etc. can be made thin to have a leaf spring function so that the rod 18 side can swing.

The pickup 6 is swingably supported by the pickup connecting rod 18 of the measurement main body A.
Inside, a stylus lever 63 with a ferrite plate 62 attached to one end faces an inctance-type displacement tester 61 fixed to the inner wall of the pickup body, and a stylus lever 63 has a stylus lever 63 with a ferrite plate 62 attached to one end. A downward-facing stylus 4 is attached to the tip of the lever 63, and the stylus lever 63 and the stylus 4 are attached to the tip of the lever 63.
A skid 5, which is inserted at appropriate intervals, is fixed to the curved end of the pickup body. When the stylus 4 is not in contact with the workpiece W, the stylus lever 63 is set by the leaf spring 64 so that it slightly protrudes from the tip surface of the skid 5, so that the stylus lever 63 swings against the skid (pickup body). It is movably supported. Further, the inctance type detector 61 has its coil #1li (not shown) connected to the signal rod 6a16a described in the description, and this allows the swinging of the stylus lever 63 during measurement, that is, the ferrite The rocking displacement of the plate 62 changes the current of the detector 61, and this change is finally displayed on the display as the surface roughness of the workpiece.

Since the pickup mechanism described above moves forward and backward in the direction H by the drive of the motor 10, it is preferable to move it parallel to the slide shaft 15, which is the reference for the direction of the driving force, from the viewpoint of measurement accuracy or convenience of operation. preferable. Therefore, when the pickup 6 comes into contact with the workpiece W, the slide shaft 15, in other words, should be parallel to the above-mentioned virtual plane between the front plate 2 and the rear plate 3, which forms a plane parallel to the axis, and the front end surface of the skid 5. To be at the same level position as the virtual plane, drive!
l! The dimensions and arrangement of 13 rock formations and Bicqua 71 etc. have been set.

As mentioned above, the nose piece 7 mainly performs the function of protecting the pickup 6, especially the skids etc. that protrude to the outside, so it can be removed and used for @sound measurement as described below, but the nose piece 7 can be used with its lower surface flattened. front plate 2 and rear plate 3
By positioning it approximately at the same level as the virtual plane formed by the base of the 7-x piece, only the 7-x piece portion can be safely brought into contact with the workpiece surface and used when measuring a small-sized workpiece.

With the above configuration, the surface of the workpiece W can be
When measuring, if the upper surface of the workpiece is a flat plate as shown in FIG.
The pickup 6 moves forward and backward as a result of the operation, and its stylus 4 traces the surface of the workpiece to detect surface roughness. Since the pickup 6 moves back and forth approximately parallel to the bottom surface of the measuring machine main body, that is, the virtual plane mentioned above, the stylus 46 that is in contact with the surface of the workpiece W moves approximately parallel to this trace, making roughness measurement less prone to errors. will be possible. In this case, since the skid 5 also traces the surface of the work W, the amount of displacement of the stylus 4, which is displaced independently in relation to the skid, is determined by the so-called "waviness" component removed by the skid 5, that is, the surface roughness. You will get it as.

Next, in cases where the measuring machine mounting surface on the workpiece surface has a complex and large uneven shape, small parts, or when the measuring surface is relatively thin and has a large diameter, the measuring machine itself cannot be stably mounted. First, in the case of measurement work in which it is difficult to hold the measuring instrument by hand due to posture, attach the stand adapter B to the rear surface [3 of the measuring instrument body A] with screws or the like as shown in FIG. 4. The support rod 101 of the adapter B is then gripped by a gripping arm of a stand jig such as a magnetic stand. As a result, the measuring instrument main body A is fixedly supported by the stand jig 1 via the stand adapter B. Therefore, stable and accurate measurement can be performed by aligning the support posture with the measurement surface of the workpiece and bringing the stylus 4 into contact with the measurement surface and tracing. Even if the measurement surface is a pore, as long as the pore size is larger than the diametrical dimension of the measuring device main body A, the main body can be inserted into the hole to perform measurement.

Figures 5 and 6 respectively explain the case of measuring inside a hole and a small surface using the stand jig S. As mentioned above, it supports stably and can handle various shapes. An example of what can be done.

In the embodiment of the present invention, the bottom side 11 of the measuring instrument front plate 2 and rear plate :) is +1 is made to protrude slightly from the bottom surface of the casing 1, and V-shaped notches 2b and 3b are formed at the center of the flat sides i2a and 3a on the bottom side, so that, for example, a flat part with a slightly uneven surface can be formed. For measurements, it is possible to stably place the main body with two-point support using the above protrusion.
Further, in the case of a cylindrical workpiece, it can be stably placed using the V-shaped notch.

However, in the case of the above uneven surface, stand adapter B
By using this, measurements can be made without any practical problems. That is, the pickup stylus 4 responds to the pickup body together with the skid 5, and the skid tip surface (work contact surface) through which the stylus is exposed generally forms an arcuate surface. Therefore, even if the main body A is slightly inclined, the relative position of the arc surface of the skid and the touch button does not cause an error large enough to cause a practical problem, and in the end, the positioning of the arc surface of the skid and the touch button does not occur to the extent that it causes a practical problem. By using support, stable contact can be achieved. Therefore, it is not necessary to make the front plate and the rear plate protrude as in the above embodiment.

In addition, in the case of a cylindrical workpiece, when measuring in the #J line direction, use a yoke just like when measuring a deep hole, and touch the measuring body parallel to the cylindrical axis of the workpiece. By holding the workpiece, measurement work can be carried out without causing traces that are misaligned in the arc direction of the workpiece.

As stated above, I) In any case, in order to achieve the object M of the present invention, the above-mentioned bottom end drawing of the front plate and the rear plate is not necessarily required, but it is easier to use the structure as described above. It goes without saying that it can be done.

Effects> As described above, according to the present invention, it is possible to provide a highly practical mounted surface roughness measuring instrument that exhibits the following various effects.

(1) Only the mechanisms necessary to drive the pickup, such as the feed screw shaft coaxial with the motor, the slide shaft, and the pickup connecting rod, are built into the casing to process pickup signals and perform calculations to display required roughness data, etc. The display mechanism, which is equipped with several power sources for supplying current to the drive mechanism of the measuring instrument main body, the pickup, etc., is connected by a signal cable, so the measuring instrument main body has a convenient shape and shape for making it portable. This makes it possible to easily measure large workpieces, etc., which was conventionally complicated, and to directly measure the workpiece in its original state, making it possible to obtain a measuring machine with extremely high practicality.

(2) Since it can be held and carried in the hand, it can be used for measurement at production sites, and together with the realization of simple and quick measurements, it greatly contributes to improving productivity and work efficiency.

(3) The rear part of the measuring device can be supported using a stand adapter, so that even if it is difficult to measure by directly placing the measuring device on the inner surface of a hole, it can be measured stably and accurately. In addition to measuring workpieces with various general shapes, it can also be used to measure parts that are difficult due to conventional postures, regardless of the posture, and its practicality is even more impressive.

(4) The stand adapter can be attached to and detached from the rear panel of the measuring instrument using screws, etc., so it is easy to attach and detach.
It is also possible to carry out measurements while being attached to the rear plate, and it can be used with good workability.

(5) The stand jig for holding the stand adapter can be a general stand jig that is normally kept at production sites, and can be easily used without requiring any special effort or preparation. can.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an exploded perspective view of the main body components of the surface roughness measuring machine, Fig. 2 is a perspective view of the stand adapter, and Fig. 3 is an internal structure of the measuring machine. cross section,
Figure tPJ4 is a right side view of Figure 3 showing the stand adapter attached state, and Figures 5 and 6 are measurement examples using the stand adapter and stand jig. 1: Casing 2: Front plate 3: Rear plate 2a/3
a: Bottom 4: Stylus 5 Nisquid 6: Bin amplifier 6a: Signal rod 7: Nose piece 8
:Signal cable 9:Connector 10:Motor 11
:Metej! i Iso 12: Coupling 13: Feed screw shaft 14: Feed nut 15 Ni slide shaft 17:
Leaf spring 18: Pickup connecting rod 61: Inctance type displacement detector 62 Near elite plate
63: Stylus lever 64: Leaf spring 100: Mounting plate 101: Support rod 102: Recessed part 103: Mounting hole A: Roughness measuring machine body B: Stand adapter
S: Stand jig W: Workpiece

Claims (1)

[Claims] A mechanism that drives the pickup forward and backward, which is equipped with a stylus that traces the work surface to detect roughness displacement, a converter that converts the displacement into an electrical signal, and a skid that cancels the waviness component of the work surface, inside the prismatic casing. The surface roughness measuring device is equipped with a casing and outputs the electric signal to an external display device via a signal cable, and both ends of the casing are closed by a front plate and a rear plate, and the front plate has the above-mentioned It forms an opening into which the pickup is inserted loosely,
A main body configured such that the pickup is movable relative to the casing, a mounting plate detachably attached to the rear plate of the main body, and a support provided integrally with the plate and held by an arm of a stand jig. A mounted surface roughness measuring machine consisting of a rod and a stand adapter.