JP3977766B2 - Friction / wear measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for measuring frictional resistance or abrasion scratch resistance of a material surface used for various products.
[0002]
[Prior art]
Conventionally, various thin films have been applied to the surface of various products in order to prevent rust or maintain a good lubrication state. Adhesion force is measured by measuring frictional resistance and abrasion scratch resistance.
[0003]
The measurement method consists of a so-called continuous load measurement that is performed while continuously applying a vertical load to a probe that contacts the surface of the test piece, and a constant load measurement that is performed while moving the test piece by applying a predetermined vertical load to the probe in advance. Is known. For example, Patent Document 1 is known as an apparatus for measuring the frictional resistance or scratch resistance of a test piece by the measurement method.
[0004]
[Patent Document 1]
Japanese Patent No. 2700997 (FIG. 2).
[0005]
When performing constant load measurement after performing continuous load measurement with the above device, after hanging the rotating weight on the weight receptacle, place a weight with a constant weight on the receptacle of the probe and apply a vertical load to the probe. In addition, measurement is performed while moving the test piece.
[0006]
Further, there is known an apparatus that performs continuous load measurement of a test piece by simultaneously operating different moving means for moving a rotary weight for continuous load measurement and a test table on which the test piece is placed (for example, a patent). Reference 2).
[0007]
[Patent Document 2]
Utility model registration No. 2063398 (FIG. 1).
[0008]
[Problems to be solved by the invention]
The inventions and devices shown in Patent Documents 1 and 2 can perform continuous load measurement and constant load measurement, respectively. When performing constant load measurement after continuous load measurement, the rotating weight is hung on the weight receiver. Each time a fixed amount of weight is measured on the receptacle of the probe, the measurement is performed by applying a different vertical load to the probe. For this reason, it takes time to store the rotating weight and replace the fixed weight, and it takes time to measure and is inefficient.
[0009]
In constant load measurement, the same work is repeated many times while changing the fixed weight from one to the next, which is time consuming and inefficient, and scratches the test piece with the weight of a certain stage. However, since weights having different weights change in units of grams, it is difficult to measure accurately, for example, it is unclear whether scratching resistance has occurred for the first time at that weight.
[0010]
In the apparatus that performs the continuous load measurement or the constant load measurement, the measuring element cannot perform a peel resistance measurement by reciprocating repeatedly while keeping a constant load on the same trajectory of the test piece or a light load. In addition, there is a problem in that it is impossible to measure the friction of the test piece and the wear depth and wear volume at a time.
[0011]
Therefore, the present invention makes it possible to measure and display the peel resistance of a test piece by continuous load fluctuation measurement as friction force, friction coefficient, wear depth and wear volume, and to perform conventional continuous load measurement and constant load measurement. An object of the present invention is to provide an apparatus that can efficiently obtain accurate measurement data by a simple operation such as switching a switch without changing the weight.
[0012]
[Means for Solving the Problems]
According to the first aspect of the present invention, a support strut is provided on the upper surface of the base so as to be movable up and down, and a balance arm for measuring the friction and wear resistance of the test piece is pivotally supported on the support strut so that the balance is supported. A test piece provided on the other side of the balance arm is mounted on the other side of the balance arm, with a moving table interlocking with the moving weight attached to the load portion being attached to the upper surface of the base below the load portion attached to one side of the arm. A sample table is attached to the upper surface of the base below the probe attached to the measuring unit for measuring fluctuations in force and frictional resistance so that the sample table can be moved forward and backward, and the shaft is pivotally supported on the upper surface of the base. One end of the support shaft is attached to the upper end of the support shaft, and a displacement meter attached to the other end of the support shaft is formed to be detachable from directly above the measuring element by the rotation of the shaft portion. measuring the displacement of the distance between the measuring element, wherein Fee table and simultaneously to both the mobile table or by advancing and retreating either, the frictional force of a test piece, the frictional resistance, characterized by providing a measurable and displays a wear depth and wear volume.
[0013]
Accordingly, it is possible to easily measure and display the frictional force, frictional resistance, wear depth, wear volume, and the like by continuous load fluctuation friction / wear measurement, continuous load scratch measurement, and constant load measurement of the test piece.
[0014]
The balance arm has a load part attached to one of the pivots located in the center and a measurement part attached to the other, and the weight of the moving weight of the load part is different from the measured value capacity of the load cell attached to the measurement part. It is characterized in that at least two or more balance arms thus made are exchangeably supported on the support column so as to be pivotable. In addition, one end of a pair of slide shafts in which the load portion of the balance arm is positioned in parallel is fixed to the shaft support portion, and the moving weight is slidably inserted into the slide shaft. A fixed piece is attached to the end, and an adjustment weight for fine adjustment of the balance is screwed onto the screw shaft provided in the axial direction of the balance arm at the other end of the fixed piece, and guide pulleys provided on both sides of the moving weight Is slidably inserted in a guide groove of a guide frame attached to the moving table, and a moving weight is slidably provided in accordance with the forward / backward movement of the moving table and the vertical movement of the balance arm. Furthermore, the measurement part of the balance arm attaches one end of a measurement board formed in a substantially L shape to the shaft support part, attaches a fixed weight to balance the moving weight to the back surface of the measurement board, and attaches it to the surface of the measurement board. The load cell and connection connector are located on the same axis as the balance arm, and a measurement axis is attached in a direction perpendicular to the load cell. The measurement axis can be pivoted on a fixed frame attached to the measurement board. The probe is slidably mounted in the vertical direction at the tip of the measuring shaft, a sensing pan is provided on the upper part of the measuring element, and a needle part that slides on the test piece is detachable on the lower part. The vibration of the needle part is transmitted to the load cell via the measuring shaft and the connection connector, and can be displayed by the various recording display devices built in the base from the load cell.
[0015]
Therefore, continuous load fluctuation friction / wear measurement, continuous load scratch measurement, and constant load measurement can be switched easily, and there is no need to store a moving weight when switching from continuous load scratch measurement to constant load measurement. At the same time, it is possible to improve the measurement work by eliminating the need to replace the weight when measuring a constant load.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view of a measuring apparatus of the present invention, FIG. 2 is a plan view of the measuring apparatus of the present invention, FIG. 3 is a front view of a balance arm, and FIG. FIG. 5 is a partially cutaway side view showing the moving table and the moving direction of the moving weight, FIG. 6 is a sectional view taken on line AA of FIG. 5, and FIG. FIG. 8 is a circuit diagram of the measuring apparatus of the present invention, FIG. 9 is a plan view of the measuring unit, and FIG. 10 shows the positional relationship between the measuring element and the displacement meter. It is a schematic diagram.
[0017]
As shown in FIGS. 1 and 2, the measuring apparatus 10 is provided with a display unit 12 for displaying various data on the front surface of the base 11, and a support column 13 that is vertically movable at the center of the top surface of the base 11. A shaft support 16 and a balance arm 15 for measuring the friction / wear resistance of a piece (not shown) are supported so as to be detachable and pivotable. The balance arm 15 is formed with one unit by attaching a load portion 18 to one of the shaft support portions 16 provided in the center and a measurement portion 50 to the other. The moving table 30 is attached to the upper surface of the base so as to be movable back and forth below the load portion 18, and the sample table 65 is also attached to the shaft support portion 16 below the measurement portion 50. It is installed so that it can move forward and backward.
[0018]
In FIG. 3, the balance arm 15 has at least two or more, preferably low load (maximum load 50 g, maximum load cell measurement) in which the weight of the moving weight 25 of the load portion 18 and the measured value capacity of the load cell 53 are different. Two types, 0.98 N) and high load (maximum load 1000 g, load cell maximum measured value 19.61 N), are prepared and can be arbitrarily replaced depending on the thickness and strength of the test piece.
[0019]
The load portion 18 of the balance arm 15 has a shaft support portion 16 fixed to one end of a pair of slide shafts 19 arranged in parallel, a fixed piece 20 attached to the other end of the slide shaft, and the other end of the fixed piece. Are screwed with an adjustment weight 22 for finely adjusting the balance of the balance arm 15 to a screw shaft 21 provided in the axial direction of the balance arm 15.
[0020]
As shown in FIGS. 5, 6, and 7, the moving weight 25 is moved by inserting the pair of slide shafts 19 slidably into a plurality of holes 27 provided in the weight body 26 constituting the moving weight 25. Can be done smoothly. Further, when the moving weight for high load is slid (for example, the maximum load is 10000 g), the moving weight 25 can be smoothly slid because the plurality of slide shafts 19 can disperse and support the weight.
[0021]
The guide pulleys 28 attached to both sides of the weight body 26 of the moving weight 25 are slidably inserted into guide grooves 43 of a guide frame 42 attached to one end of the moving table 30, so that the moving table 30 The slide shaft 19 can be smoothly slid in accordance with the forward / backward movement and the vertical movement of the balance arm 15.
[0022]
Guide plates 29 are attached to both sides of the guide groove 43 to prevent the guide pulley 28 inserted into the guide groove 43 from rattling and to slide smoothly, and to prevent the guide groove 43 from falling off.
[0023]
The moving table 30 is attached so as to be able to move forward and backward in the same direction as the axial center direction of the balance arm 15 by a guide rail 30 a provided below the load portion 18 and provided on the upper surface of the base 11.
[0024]
As shown in FIG. 6, the moving table 30 is moved back and forth between a rack 31 attached to the back surface of the moving table 30 and a pinion 33 pivotally supported at the tip of a drive shaft 32 positioned in the base 11. It operates by.
[0025]
As shown in FIG. 7, the rotation of the drive shaft 32 is performed by interlocking the speed reducer 38, the pulley 39, and the pulley 34 of the drive shaft with a belt 40 from the first motor 37 mounted in the base 11. A start position and an end position of the moving table 30 are set by the light shielding plate 35 and the optical sensor 36 attached to the drive shaft 32, and are preferably formed so as to be reciprocally movable or one-way movable within a range of about 1 to 100 mm. The light shielding plate 35 attached to the drive shaft 32 is interlocked with the optical sensor 36 so as to be capable of detecting at least three points for origin detection, start position and end position.
[0026]
As shown in FIG. 9, the measurement unit 50 has one end of a measurement substrate 51 formed in a substantially L shape attached to the shaft support portion 16, and the back surface of the measurement substrate 51 is balanced with the moving weight 25. A fixed weight 52 having the same weight is attached.
[0027]
On the surface of the measurement substrate 51, a load cell (load displacement converter) 53 and a connection connector 55 are positioned on the same axis as the balance arm 15, and a measurement shaft 56 is attached in a direction perpendicular to the load cell. The measuring shaft 56 is pivotally supported by a support frame 57 provided at the tip of the measurement substrate 51 so as to be pivotable. A measuring element 60 is slidably attached to the tip of the measuring shaft 56 in the vertical direction. .
[0028]
As shown in FIG. 10, a sensing tray 61 is attached to the upper part of the measuring element 60, and a needle part 62 formed of jewels having hardness such as sapphire and diamond is detachably attached to the lower part.
[0029]
Friction / wear measurement by the probe 60 senses vibrations generated when the needle 62 is slid on a test piece (not shown) placed on the sample table 65, and the vibrations are measured with the measurement shaft 56. The signal is transmitted to the load cell 53 via the connection connector 55, converted into a signal, amplified by various amplifying devices 14 (for example, a dynamic strange amplifier) built in the base 11, and displayed on the display unit 12. Furthermore, it is possible to output and display (for example, friction force, friction coefficient, friction depth, friction volume, etc.) on various recording devices.
[0030]
The sample table 65 is attached to the upper surface of the base 11 below the probe 60 so as to be movable back and forth by a guide rail 65a in the same direction as the moving table 30. Similar to the moving table 30, the sample table 65 is moved back and forth by meshing between a rack 66 attached to the back surface of the moving table and a pinion 67 pivotally supported at the tip of a drive shaft 68 positioned in the base 11. Operate.
[0031]
As shown in FIG. 7, the drive shaft 68 drives a speed reducer 73, a pulley 74, and a pulley 69 of the drive shaft 68 in conjunction with a belt 75 from a second motor 72 mounted in the base 11. The start position and the end position of the sample table 65 are set by a light shielding plate 70 and an optical sensor 71 attached to the shaft portion of the drive shaft 68, and preferably formed so as to be reciprocating or one-way movable within a range of 1 to 100 mm. It is.
[0032]
The light-shielding plate 70 attached to the drive shaft 68 is interlocked with the optical sensor 71 in the same manner as the drive shaft 32 of the moving table 30, and is attached so as to be able to detect at least three positions for origin detection, start position and end position. It is.
[0033]
The feed knob 77 attached to the front surface of the sample table 65 is an adjustment of the sample table so that it can be moved in the width direction. By using the table so that it can be moved in the width direction, the unused portion of the test piece is used. It is possible to make multiple measurements with a single test piece. The first and second motors 37 and 72 are operated by linking them while controlling the control current by a programmable control device, for example, a sequence 87.
[0034]
The displacement measuring device 80 has an L-shaped support shaft 82 attached to the upper end of a shaft portion 81 that is rotatably attached to the upper surface of the base 11, and a known displacement meter 83 is attached to the tip of the support shaft. is there. By forming the shaft portion 81 to be rotatable, the displacement meter 83 can be detached from directly above the measuring element 60.
[0035]
By displacing the position of the displacement gauge 83 from directly above the probe 60, when the exchange of the probe 60 or the test piece is performed, the displacement gauge 83 does not get in the way and the exchange work can be performed smoothly and efficiently. It can be carried out.
[0036]
As shown in FIG. 10, the measurement by the displacement measuring device 80 measures the change in the distance (preferably about 5 mm) between the lower surface of the displacement gauge 83 and the upper surface of the sensing plate 61 of the measuring element 60 as the wear depth and wear volume.・ It is to be displayed.
[0037]
FIG. 8 shows a circuit diagram of the measuring apparatus 10 according to the present invention. As described above, the first motor 37 for driving the moving table 30 and the second motor 72 for driving the sample table 65 are respectively provided on the base 11. The first and second motors are respectively transmitted to the pulleys 34 and 69 via the separate speed reducers 38 and 73, pulleys 39 and 74, and belts 40 and 75, respectively. 68 is rotated.
[0038]
The first and second motors 37 and 72 are controlled by a sequence 87 (program control device), respectively, and switches for simultaneous continuous reciprocating driving, simultaneous one-way driving, one continuous reciprocating driving, one-way driving and position control (not shown). ).
[0039]
In the sequence 87, in addition to the control of the first and second motors 37 and 72, the signal from the probe 60 and the signal from the displacement meter 83 are input, and the data is sent to the display unit 12 or various recording devices. Can be sent and recorded.
[0040]
The operation of the embodiment of the present invention will be described. When the measurement device 10 performs continuous load fluctuation friction / wear measurement, a test piece for measurement is first placed on the sample table 65.
[0041]
Next, the sample table 65 and the moving table 30 are set at the start position. At this time, the weight of the movement arm 25 of the load arm 18 of the balance arm and the measured value capacity of the load cell attached to the measurement hub 50 are different from each other, and the code of the test piece of the plurality of balance arms 15 is provided. balance arm having a load weight obtained by matching the thickness and strength of the film is a tee ring member (e.g., for low load) sets, and, the support posts 13 and moved up and down, according to the thickness of the test piece To adjust the horizontal position of the balance arm 15.
[0042]
The balance of the balance arm 15 is such that the position of the fixed weight 52 and the moving weight 25 are kept farthest from the support column 13, and the tip of the needle portion 62 of the probe 60 that abuts the surface of the test piece. Fine adjustment is performed by rotating the adjustment weight 22 so that the applied load weight becomes zero.
[0043]
Although the load weight of the balance arm 15 is arbitrarily determined, it is set to a light weight that does not cause wear marks on the test piece by one-way sliding, and at least the moving table 30 and the sample table 65 are reciprocated several times to several hundred times. The load weight is set so as to wear after moving.
[0044]
Next, a start switch (not shown) is turned ON to drive the first and second motors 37 and 72 synchronously, and from the drive shafts 32 and 68 to the pinion 33 via the speed reducers 38 and 73 and the transmission belts 40 and 75, respectively. , 67 and racks 31 and 66, the moving table 30 and the sample table 65 are operated. When the moving table 30 and the guide frame 42 move in the direction of the support column 13, they are guided by the guide frame 42 and the moving weight 25 slides on the slide shaft 19 and moves in the direction of the support column 13.
[0045]
The moving table 30 and the sample table 65 reciprocate at a predetermined speed or a predetermined number of times at a constant speed of about 1 to 100 mm. The load applied to the probe 60 due to the reciprocating movement of the moving table 30 and the sample table 65 increases the vertical load on the probe 60 together with the moving weight 25 that moves the slide shaft 19 with time, and the needle that slides on the test piece. The frictional resistance of the part 62 is increased.
[0046]
The variation in load on the probe 60 is that the moving table 30 and the sample table 65 are reciprocated several times by setting the moving weight 25 to such a light weight that the test piece is not worn by sliding once. The vertical load of the tracing stylus 60 is performed by tracing while changing the load on the same locus of the test piece.
[0047]
The measurement can measure the friction and wear strength with high accuracy close to the actual use condition such as how much frictional force works at such a load and how many times the wear starts and becomes severe.
[0048]
As shown in FIG. 10, the wear depth and the wear volume are measured by detecting, with a displacement meter 83, a change that the probe 60 descends when the needle portion 62 of the probe 60 bites into the test piece due to wear. Sensing by the displacement meter 83 is performed when the distance between the sensing plate 61 of the measuring element 60 and the displacement meter 83 positioned immediately above is increased.
[0049]
Therefore, by measuring the frictional force and wear resistance variation of the test piece by changing the moving weight 25 continuously, the graph and numerical values can be measured at once with three axes of accurate vertical load, number of frictions, frictional force or wear amount. Friction and wear data can be measured and displayed efficiently in a single experiment. Since the change of the load load in the continuous load variation measurement can be easily performed by moving the adjustment weight, the measurement work can be performed efficiently.
[0050]
Next, the continuous load measurement is performed by sliding the test piece 65 on the test piece while changing the weight applied to the probe 60 during the one-way movement of the moving table 30 and the test table 65 from the start position to the end position. The change to be measured is measured as scratch resistance.
[0051]
Switch the switch (not shown) to set the movement of the moving table 30 and the test table 65 to one-way movement in advance, turn on the start switch (not shown) and drive the first and second motors 37 and 72 synchronously, The moving table 30 and the test table 65 are operated from the speed reducer, the pulley, and the drive shaft through the pinion and the rack, respectively.
[0052]
The load applied to the needle portion 62 of the probe 60 is a frictional resistance to the needle portion 62 that slides on the test piece by increasing the vertical load on the probe 60 together with the moving weight 25 that moves the slide shaft 19 over time. Becomes larger.
[0053]
As for the movement of the moving table 30 and the sample table 65, how much frictional force works with how much load, and how much wear starts and becomes severe while traveling at a constant speed over a distance of about 100 mm. The friction / wear scratch resistance can be measured over time.
[0054]
In the friction / wear measurement, the frictional resistance or abrasion scratch resistance generated when the needle part 62 moves on the test piece is detected as vibration, and is transmitted from the probe 60 to the load cell 53 via the measuring shaft 56 and the connection connector 55. This signal is amplified by the amplifying device 14 and appropriately displayed as a numerical value or a graph, and the resistance value can be recorded as necessary.
[0055]
Further, when the needle portion 62 bites into the test piece due to wear, a change in which the probe 60 descends is detected by the distance between the sensing plate 61 and the displacement meter 83 positioned immediately above, and this difference is detected as the wear depth and It can be measured as a wear volume.
[0056]
When performing a constant load measurement, adjust the level of the balance arm 15 in accordance with the test piece, set the vertical load of the probe 60 in contact with the test piece to 0, and then place a weight of constant weight on the probe 60. By moving the moving weight 25 to a position that matches the constant weight instead of placing the weight, it is possible to apply a constant weight to the probe 60 in the same manner as when the weight is placed.
[0057]
Next, the switch is changed over to set only the sample table 65 so that the sample table 65 is movable. While only the sample table 65 is moved one way at a constant speed (about 100 mm), the needle portion 62 attached to the probe 60 is moved. Friction resistance sliding on the test piece is detected as vibration, the vibration is transmitted to the load cell 53 via the measuring shaft 56 and the connection connector 55, converted into a signal by the load cell, and various amplifiers built in the base 11 By amplifying the signal and outputting and displaying it on various recording devices, it is possible to measure the coating unevenness of the test piece or the film unevenness of the decorative plate surface.
[0058]
The load applied to the measuring element 60 can be easily weighted by sequentially moving the moving weight 25 in the direction of the support column 13, so that there is no work to replace the weight or loss of the spare weight. Can be performed efficiently.
[0059]
As another measurement method, the sample table 65 on which the test piece is placed is stopped, the position of the moving weight 25 is sequentially moved in the direction of the support column 13, and only the vertical load is gradually applied to the measuring piece 60, thereby the test piece. It is also possible to measure the continuous weighted indentation strength.
[0060]
Furthermore, as shown in FIG. 11, a guide rail 90 formed in a semicircular shape is attached to the periphery of the sample table 65 on the upper surface of the base 11 of the measuring apparatus 10, and a CCD camera and illumination are mounted on the guide rail. By attaching the device 91 so as to be movable, it is possible to magnify and record a portion where the needle portion 62 of the probe 60 is in contact with the test piece.
[0061]
【The invention's effect】
The present invention is capable of measuring a wide range of test pieces by providing a plurality of exchangeable balance arms with different load weights, and continuously reciprocating or one-way movement between a moving table and a sample table by different motors. Furthermore, it is possible to switch with a switch such as driving only one side, and by simultaneously measuring wear displacement with a displacement measuring device attached to the base, continuous load fluctuation friction / wear measurement, continuous load scratch measurement In addition, it has a beneficial effect such as being able to easily and efficiently measure friction and wear under a constant load.
Since the movable table and the sample table are formed so as to be able to reciprocate, the peel resistance of the test piece can be measured, so that accurate data close to the actual use state can be obtained.
By forming the displacement meter so that it can be moved directly above the probe, it is possible to measure and display the wear depth, wear volume, etc. along with frictional resistance, etc. Since the test piece replacement operation can be easily performed without obstruction, the efficiency of the measurement operation and the accuracy of the test data can be improved.
Since the movable table and the sample table are configured to be operable with different driving sources, it is not necessary to store the moving weight when performing constant load measurement, and it is not necessary to replace the weight. It is advantageous in that it is economical because it is not necessary to prepare a large number of weights.
[Brief description of the drawings]
FIG. 1 is a front view of a measuring apparatus according to the present invention.
FIG. 2 is a plan view of a measuring apparatus according to the present invention.
FIG. 3 is a front view of a balance arm.
FIG. 4 is a partially broken plan view showing a moving weight attached to a load portion.
FIG. 5 is a partially broken side view showing a moving direction of a moving table and a moving weight.
6 is a cross-sectional view taken along the line AA in FIG.
FIG. 7 is an explanatory diagram showing power transmission means for driving a moving table and a sample table.
FIG. 8 is a circuit diagram of a measuring apparatus according to the present invention.
FIG. 9 is a plan view of a measurement unit.
FIG. 10 is a schematic diagram showing a positional relationship between a probe and a displacement meter.
FIG. 11 is a plan view of a state in which a photographing apparatus including a CCD camera is attached to the measuring apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Measuring machine 11 Base 13 Support strut 15 Balance arm 16 Shaft support 18 Load part 19 Slide shaft 21 Screw shaft 22 Adjustment weight 25 Moving weight 28 Guide pulley 30 Moving table 50 Measuring part 53 Load cell 55 Connection connector 56 Measuring axis 60 Measuring element 65 Sample table 80 Displacement measuring device 83 Displacement meter

Claims (4)

A support column is provided on the upper surface of the base so that it can move up and down, and a load arm is pivotally supported on the support column to measure the friction and wear resistance of the test piece. A moving table interlocking with the moving weight attached to the load part is attached to the upper surface of the base below the base part so as to be able to move forward and backward, and the friction force and frictional resistance of the test piece provided on the other side of the balance arm are A sample table is attached to the upper surface of the base below the measuring element attached to the measuring unit for measurement so that the sample table can be moved forward and backward. And a displacement meter attached to the other end of the support shaft is formed so as to be disengaged from directly above the measuring element by the rotation of the shaft part. the displacement was measured, moves the sample table Friction / wear measuring device characterized in that the frictional force, frictional resistance, wear depth, wear volume, etc. of the test piece can be measured and displayed by moving both the tables simultaneously or by moving either one of them back and forth. .   The balance arm has a load part attached to one of the pivots located in the center and a measurement part attached to the other, and the weight of the moving weight of the load part is different from the measured value capacity of the load cell attached to the measurement part. 2. The friction / wear measuring apparatus according to claim 1, wherein at least two balance arms are pivotally supported so as to be exchangeable and pivotable on the support column.   The load portion of the balance arm fixes one end of a pair of slide shafts positioned in parallel to the shaft support portion, slidably passes the moving weight through the slide shaft, and is connected to the other end of the slide shaft. A fixed piece is attached, an adjustment weight for fine balance adjustment is screwed onto a screw shaft provided in the axial direction of the balance arm on the other end of the fixed piece, and guide pulleys provided on both sides of the moving weight are 2. A sliding weight is provided so as to be slidably inserted in a guide groove of a guide frame attached to the movable table, and according to the forward / backward movement of the movable table and the vertical movement of the balance arm. Or the friction / wear measuring apparatus according to 2 above. The measurement part of the balance arm has one end of a measurement board formed in a substantially L shape attached to the shaft support part, and a fixed weight that balances the moving weight is attached to the back surface of the measurement board. A load cell and a connector are located on the same axis as the balance arm, and a measurement shaft is attached in a direction perpendicular to the load cell. The measurement shaft is pivotally supported by a fixed frame attached to the measurement board so as to be pivotable. is, the slidably mounted a feeler in the vertical direction on the tip of the measuring axis, the upper part of the surveying stator provided a sensing dishes mounted detachably needle portion sliding on the specimen at the bottom The vibration of the needle portion is transmitted to a load cell via a measurement shaft and a connection connector, and can be displayed by the various recording display devices built in the base from the load cell. Or Ma And wear measurement device.

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