JPH0755670A - Automatic tension testing unit - Google Patents

Abstract

PURPOSE:To save labor and to prevent measuring errors resulting from impressions by automatically marking off lines on test pieces, and automatically measuring elongation between the lines without contact. CONSTITUTION:A plurality of test pieces 1 are stacked one atop another and placed on a feeder 2, and a conveyor 3 conveys the test pieces 1 to a thickness measuring instrument 4, an application device 5, and a marking-off device 6 in sequence. Two parallel lines perpendicular to the direction of tension are automatically marked off on a painted portion, and an image of the set test pieces is taken, and the distance between the two lines is measured from the image without contact. The marked-off test pieces 1 are set in a tension tester 8 by a setting device 7, and the width of each test piece 1 is measured by a width measuring instrument 9, and then a tensile load is exerted on the test pieces and elongation of each test piece 1 is measured by a non-contact distortion measuring instrument 10. The measured test pieces 1 are taken out by the setting device 7 and collected in a collecting portion 11. A system controller 12 controls all of the procedures from the supply to the collecting of the test pieces 1, and records and displays measurement data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tensile tester for metallic materials and the like, and more particularly to an automatic tensile tester capable of measuring elongation without contacting a test piece.

[0002]

2. Description of the Related Art FIG. 1 shows a conventional automatic tensile test apparatus.
A structure shown in 0 is known. In the figure, 1
Is a test piece, and has a plate-like shape with enlarged grasping portions 1b at both ends of a thin parallel portion 1a at the center. A large number of the test pieces 1 are stacked and placed in front of the fixing plate a1 of the supply device a. Fixed plate a1
Has two guide plates a2, a2 facing each other, and the tip end portion a2 'of the guide plate is rotated as shown by an arrow to press the laminated body of the test piece 1 against the fixed plate a1 for positioning.

Reference numeral b denotes a conveying device, a crossbar b2 attached to the rod tip of the cylinder b1 runs on the left and right rails b3, and suction cups b4 near the left and right ends of the crossbar b2 are the first in the stack. The upper test piece 1 is adsorbed and moved to the thickness measuring device c.

The thickness measuring device c has a link mechanism c2 driven by a cylinder c1, and the test piece 1 carried by the carrying device b is sandwiched between the tips of the links c1 as shown in the drawing. The thickness of the test piece 1 is measured by the long detector c3.

When the thickness measurement is completed, the setting device d
Grips the vicinity of the center of the test piece 1 and receives the test piece 1 from the thickness measuring device c. The test piece 1 is a setting device d.
Are rotated so as to be in a vertical direction, and at the same time, the gripping tools e1,
It is inserted between e1.

The tensile test will be described below as an example. Each of the grips e1 has two movable gripping pieces e2, and the driving means (not shown) approaches the gripping pieces e1 to grip the enlarged portions at both ends of the test piece 1 as shown in FIG. When the grips e1 and e1 clamp the enlarged portion of the test piece 1 in this manner, the moving base e3 moves so that the grips e1 and e1 are vertically separated from each other in the figure, and a tensile load is applied to the test piece 1. Add. The tensile load is measured every moment by the load meter e4.

Reference numeral f is a contact type strain measuring device, in which the upper and lower clamps f1 and f1 clamp two positions apart in the longitudinal direction of the test piece 1 before being gripped by the grips e1 and e1 and subjected to a tensile load. . The extension of the test piece 1 is measured by, for example, measuring with a linear encoder f2 that the distance between the sandwiching bodies f1 and f1 increases as the tensile load increases. In this way, a tensile test is performed and a stress-strain diagram is obtained. The compression test and the bending test can be similarly performed.

[0008]

However, in the contact type strain measuring device according to the above-mentioned prior art, the two clamping bodies f are used.
In order to press the test piece 1 with 1, f1, an indentation may be left on the test piece 1, and a crack may be generated from the indentation, leading to fracture.
It was a cause of measurement error. On the other hand, in the tensile tester that measures the strain of the test piece in a non-contact manner, the marked line cannot be automatically marked on the test piece, which prevents automation of the apparatus.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an automatic tensile tester capable of automatically marking a test piece with a marked line.

[0010]

In order to achieve the above-mentioned object, the present invention provides a supply device for stacking a plurality of test pieces and a test piece directly or indirectly from the supply device. A setting device for receiving a supply and setting it in a tensile tester, wherein an automatic tensile test device for measuring physical properties of a test piece by applying a load to the set test piece to generate a strain is set with the setting device. Between the device,
An application device for applying paint to the test piece and a marking device for writing two parallel marking lines orthogonal to the load direction on the part applied with the paint are provided, and an image of the set test piece is copied. A feature of the present invention is that a non-contact type strain measuring device for measuring the distance between the two marked lines from the image to calculate the strain of the test piece is provided.

Further, the coating device may be composed of a coating table for holding both ends of the test piece and fixing it at a fixed position, a coating tool for coating the coating material, and a driving device for moving the coating tool. The scribing device comprises a fixing base for fixing the test piece in a fixed position, a scribing needle for drawing a marking line on the paint coating device of the test piece, and a drive device for moving the scribing needle, or the scribing device. The needle driving means may be configured so that the marking needle can be moved in the x-, y-, and z-axis directions orthogonal to each other. Further, the supply device, the coating device, the marking device, and the setting device may be arranged along a transport path of one transport device, and the transport device may sequentially transport the test piece to each device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of a tensile tester of the present invention. The test piece 1 has the same shape as that described in the conventional example. A plurality of test pieces 1 in a stacked state are placed on the supply device 2 at the right end of the drawing, and the uppermost test piece 1 is picked up by the transport device 3, and the thickness measuring device 4, the coating device 5, and the scribing device are taken. It is sent to 6 in sequence.
Then, the marking device 6 is passed to the setting device 7 composed of an articulated robot, set in the tensile tester 8, the width of the test piece is measured by the width measuring device 9, and then the tensile test is started. The strain is measured by the strain measuring device 10. The test piece 1 for which the measurement has been completed is taken out by the setting device 7 and collected in the collecting part 11. 1
Reference numeral 2 is a system control device, which is configured to automatically perform the supply and recovery of the test pieces corresponding to various kinds of test piece sizes. Prior to the tensile test, the shape, the test conditions, and the conveying device 3 of the test piece 1 of one test lot
Necessary items such as the stop position are registered in advance, and the tensile test is automatically performed based on this.

FIG. 2 is a diagram showing the details of the supply device 2. The supply device 2 is attached to both ends of a main body 2a having a shape in which the center of a rectangular parallelepiped is thick and the left and right sides are stepped to be thin, and two horizontal shafts (not shown) that pass through the top and bottom of the main body 2a left and right. Belt wheels 2b and 2c, a belt 2d stretched between the upper and lower belt wheels, and an elevating table 2e on which both ends of the belt wheels 2d are fixed and a stack of test pieces 1 is placed.
A columnar longitudinal regulation means 2f, 2f symmetrically provided in the central portion of the main body 2a, a drive portion 2g for widening or narrowing the distance while keeping the longitudinal regulation means 2f symmetrical. It is composed of L-shaped doors 2h, 2h provided facing the means 2f, 2f and rotatable about a shaft 2i, and a width regulating means 2j.

The L-shaped doors 2h and 2h are opened by rotating them by 90 ° in the direction opposite to the arrow from the position shown in the figure, and a stack of a large number of test pieces 1 is carried in and placed on the elevating table 2e. Test piece 1
The central parallel part of the laminated body is lightly pressed against the length regulating means 2f, 2f, the doors 2h, 2h are rotated in the direction of the arrow to the position shown in the figure, and the laminated body is lightly pressed and held by the bent tip of the door. . Next, the drive part 2g moves the length regulating means 2f, 2f in the direction of the arrow so that the rounded corner of the length regulating means 2f has an arcuate side surface between the central parallel portion 1a and the enlarged portion 1b of the test piece 1 ( Alternatively, the test piece 1 is positioned in the longitudinal direction by contacting the inclined surface 1c. The stacked body in this state is the lifting table 2e.
Can be moved up and down.

The width regulating means 2j is provided above the supply device 2 in order to position the test piece 1 at the top of the stack. When the uppermost test piece 1 is lifted up to the predetermined height by the lift 2e, the width regulating means 2j
The disk at the tip of the rod advances by the cylinder to move the central parallel portion 1a of the uppermost test piece 1 from the side surface to the longitudinal regulating means 2
Press firmly on f and 2f for accurate positioning.

FIG. 3 is a perspective view of the carrying device. The conveying device 3 is provided with a feed screw 3b along the longitudinal direction of the rectangular frame 3a, and the driving means 3c housed at one end of the frame 3a rotates the screw 3b to advance and retract the transfer bracket 3d screwed with the screw 3b. It is what makes me. As the driving means 3c, a stepping motor or the like that can be easily quantitatively controlled is used. Lifting means 3e are attached to both sides of the transfer bracket 3d, and suction pads 3f are provided at the lower ends of the lifting means 3e, respectively.
Is connected to a vacuum source 3h by a flexible tube 3g. The suction pads 3f, 3f can be lowered by H1 by the elevating means 3e driven by a stepping motor or the like,
Adsorb the enlarged portions 1b, 1b of the test piece 1 at that height,
Transport the specimen along the B axis.

Here, the I-axis is the axis of the supply device 2 described in FIG. 2, and in FIG. 2, the test piece 1 is the width regulating means 2.
It is the central axis A of the uppermost test piece 1 when it is pressed against the longitudinal regulating means 2f, 2f by j. The II axis indicates the thickness measuring device, the III axis indicates the coating device, and the IV axis indicates the central axis of the test piece 1 in the scribing device.

In FIG. 2, an elevating table 2e elevates and lowers the laminated body of the test piece 1 so that the central axis A of the uppermost test piece is
Match with the I axis in FIG. Next, the transfer device 3 of FIG.
Comes above H1 on the axis. The suction pads 3f, 3f descend by H1 to adsorb the test piece 1 and move to the II axis position.

As described above, when determining the position of the test piece 1, the supply device 2 is positioned by sandwiching both side surfaces of the central parallel portion 1a. Therefore, if the shape of the test piece 1 is different, the axis A of the test piece 1 deviates from the I axis. Therefore, necessary data such as the width of the central parallel portion 1a of the test piece is input to the system control device 12 in advance, and the stop position is arithmetically controlled by the system control device 12 on the basis of the data. It has a structure that can be adapted to the shape.

FIG. 4 shows the thickness measuring device 4 at the position of the II axis.
FIG. The thickness measuring device 4 includes a moving means 4a having a feed screw in a frame, a moving base 4b which moves by being screwed into the feeding screw of the moving means 4a, and holding pieces 4c provided at both ends of the moving base 4b. , 4c, and length measuring devices 4d, 4d provided at vertically fixed positions of the moving destination of the moving table 4b, and expansion / contraction means 4f, 4f for moving the movable shaft 4e of the length measuring device back and forth. The holding piece 4c can rotate about the support shaft as shown by an arrow, and can move back and forth in the direction of the support shaft to sandwich the test piece with the moving table 4b.

The test piece 1 conveyed by the conveying device 3 from the supply device 2 reaches the position H1 at the position of the II axis in FIG. 3, but the position is the position of the test piece 1 shown in FIG.
After that, the suction pads 3f, 3f are lowered by H1 by the elevating means 3e, and the test piece 1 comes to the position of the II axis and is placed on the moving table 4b, but before that, the holding pieces 4c, 4c are ,
At the position rotated by 90 ° from the position shown, the test piece 1
Is open to allow entry from above. Suction pad 3
When the vacuum of f is broken and the test piece 1 is placed on the movable table, and the suction pad 3f is moved up to its original position, the holding piece 4c is rotated 90 ° to the position shown in the figure, and is subsequently lowered to move down to the test piece. 1 is gripped with the moving table. A through hole 4g is formed in the center of the movable table 4b, and the central parallel portion 1a of the test piece 1 is located on the through hole 4g.

The feed screw of the moving means 4a rotates and the center parallel portion 1a of the test piece 1 moves up and down so that the movable shaft 4 of the length measuring device can be measured.
Reach between e and 4e. When the upper and lower expanding / contracting means 4f, 4f bring the movable shaft 4e of the length measuring device 4d close to each other, the upper movable shaft 4e comes into contact with the upper surface of the central parallel portion 1a of the test piece 1. On the other hand, the lower movable shaft 4e passes through the through hole 4g and passes through the central parallel portion 1a.
Abut the lower surface of.

The length measuring device 4d is made of, for example, a magnet scale or a laser scale, and can measure the coordinates of the tip of the movable shaft 4e with desired accuracy. Therefore, for example, by knowing the positions where the tip ends of the upper and lower movable shafts 4e, 4e contact and the positions where they contact the upper and lower surfaces of the test piece 1, the thickness t of the test piece at the longitudinal centerline can be directly measured. You can In the example of the present invention, the location is changed along the longitudinal direction of the test piece 1, and the thickness is measured at three locations,
It is supposed to be averaged. The thickness data is registered in the system controller 12. According to the configuration of the above embodiment, since there is no link mechanism as in the conventional example shown in FIG. 10, accurate thickness measurement can be performed without being affected by rattling of the link mechanism.

When the thickness measurement is completed, the upper and lower movable shafts 4
The e moves backward and returns to the original position, the feed screw of the moving means 4a rotates in the opposite direction, and the moving table 4b returns to the position shown in FIG. The holding pieces 4c, 4c rise and rotate by 90 ° to release the test piece 1, and the suction pad 3f of the transfer device 3 lowers to adsorb the test piece 1 again, and lifts it upward to move it to the III axis of FIG. position,
That is, it is carried to the coating device 5.

FIG. 5 shows details of the coating device 5. The coating device 5 includes a fixed base 5a, holding pieces 5b provided at both ends of the fixed base 5a, drive means 5c for rotating and advancing the holding piece 5b as shown by an arrow, and provided above the test piece 1. The nozzle 5d thus fixed, a fixture 5e for the nozzle 5d, and a moving means 5f for moving the fixture 5e substantially parallel to the test piece 1.
And a flexible pipe 5g for supplying paint to the nozzle 5d,
It is composed of a paint tank 5h provided at the base end of the pipe 5g. The tank 5h is filled with a white paint that is quick-drying and reflects light well.

In FIG. 3, the suction pad 3f that has adsorbed and conveyed the test piece 1 reaches above the III axis, and when H1 is lowered, the vacuum is broken and the test piece 1 is placed on the III axis. The position of the test piece 1 at this time is the position of the test piece 1 shown on the fixed base 5a in FIG. The holding piece 5b moves in the same manner as the holding piece 4c of FIG. 4 by the driving means 5c to fix the test piece 1 to the fixed base 5a.
Accept and secure on top.

The nozzle 5e is moved along the test piece 1 above the fixed base 5a by the moving means 5f. Then, while the nozzle 5e moves in the central portion 1a of the test piece 1, the coating material is sprayed on the test piece to form a coating film having a certain width along the longitudinal center axis of the test piece 1. When the application is completed, the holding piece 5b is opened, the suction pad 3f is lowered to adsorb the test piece 1, and the test piece 1 is conveyed above the next IV axis.

FIG. 6 is a perspective view of the marking device. The marking device 6 is roughly divided into a holding portion 6 for holding the test piece 1.
1, a longitudinal position regulating portion 62 that regulates the longitudinal position of the test piece 1, and a marking portion 63.

The holding unit 61 includes left and right lifts 61a on which the test piece 1 is placed, and driving means 61 for moving the lifts up and down.
b, a holding piece 61c on the elevating table for pressing the test piece against the elevating table, a fixing table 61d provided between the left and right elevating tables 61a, and a test piece 1 provided on the elevating table 61a.
And a width rolling restriction means 61e for positioning in the width direction. Among these, the driving means 61b and the fixing base 61d are
It is fixed to a base plate (not shown).

The longitudinal position restricting portion 62 has a rectangular plate-like longitudinal position restricting member 62a, a pair of arcuate members 62b slidably provided thereon, a linear moving part 62c, and one end of the arcuate member 62b. Is rotatably connected and the other end is a linear motion portion 62c.
And a connecting member 62d slidably and rotatably connected to the shaft. Longitudinal position regulating member 62a and linear motion portion 62c
Is fixed to the same base plate as the fixing base 61d.

The marking portion 63 is connected to a y-axis transfer means 63a fixed to the same base plate as the fixing base 61d and a bracket 63b which is screwed into a feed screw of the y-axis transfer means 63a and is orthogonal to the y-axis. It is attached to an x-axis transfer means 63c having a feed screw extending in the x-axis direction and a bracket 63d screwed to the feed screw of the x-axis transfer means 63c, and x, y
Z-axis transfer means 6 moving in the z-axis direction orthogonal to both axes
3e and a marking needle 63f attached to the z-axis transfer means 63e.

When the transport device 3 transports the test piece 1 coated by the coating device 5 and comes to the IV axis in FIG. 3, the suction pad 3f descends and the test piece is placed at a position overlapping the IV axis. . This position is the position of the test piece 1 shown in FIG. 6, and at this time, the upper surface of the elevating table 61a and the upper surface of the fixing table 61d are flush with each other. The holding piece 61c can be rotated and moved up and down like the holding piece 4c in FIG.

When the test piece 1 is placed on the fixing table 61d, the holding piece 61c first presses lightly from above to temporarily determine the position of the test piece. Next, the rolling member 61e 'at the tip of the width rolling restricting means 61e moves forward to contact the test piece 1 for positioning in the width direction. Next, the linear motion portion 62c moves in a direction in which the arrow expands (or in a direction in which the arrow narrows) while keeping the two circular arc members 62b, 62b symmetrical with respect to the center D axis, and the tip circular arc surface of the circular arc member 62b is moved to the test piece 1 The test piece 1 is positioned in the longitudinal direction by bringing it into contact with the circular arc surface (or sloped surface) 1c. After the accurate positioning is performed in this manner, the holding piece 61
c is pressed firmly and positioned.

When the test piece 1 is positioned as described above, the x-axis transfer means 63c, the y-axis transfer means 63a and the z-axis transfer means 63e of the marking portion 63 cooperate to move the marking needle 63f to the test piece 1. Of the coating unit 1d
The paint of d is stripped off, and two marking lines D1 and D2 orthogonal to the load direction, that is, the longitudinal direction of the test piece 1 are scratched one by one at preset positions. When the marking of the marked line is over,
The width rolling restriction means 61e and the circular arc member 62b form the test piece 1.
Then, the holding piece 61c releases the test piece 1 from the lifting table and the fixing table. The suction pad 3f of the transfer device 3 descends to adsorb and lift the test piece 1, and sends it to the next setting device.

FIG. 7 is a view showing the setting device 7, the tensile tester 8, the width measuring device 9 and the recovery unit 11. The setting device 7 includes a base 7a, a swivel portion 7b provided on the base 7a, rotatable about an axis parallel to the z axis, and swivel portion 7b.
Axis 7c parallel to the y-axis provided on the upper part of the
Upper arm portion 7d rotatably attached to the upper arm portion 7d
A shaft 7e provided at the tip of the shaft and parallel to the shaft 7c, and this shaft 7e
A forearm 7f rotatably attached to the forearm and a forearm 7f
7g provided at the tip of the shaft parallel to the shaft 7e, a disk 7h rotatably attached to the shaft 7g, and an axis parallel to the x-axis that passes through the center of the disk 7h and is attached to the disk 7h. It is composed of a hand 7i that is rotatable around, and operates according to instructions from the system controller 12 and a motor and control equipment (not shown) built in the base 7a and each shaft. With the above configuration, the setting device 7 can hold the test piece 1 gripped by the hand 7i in any position around the base 7a and in any posture.

Test piece 1 marked with a marking device 6
Is in a state of facing the setting device 7. The hand 7a of the setting device 7 moves so as to hold the central portion of the test piece 1 in accordance with the shape of the test piece 1 based on an instruction from the system control device 12. Then, from the received state, for example, the test piece 1 is rotated by 90 ° about the x-axis, then rotated by 180 ° about the z-axis, and the upper arm portion 7d and the forearm portion 7f are extended. It can be supplied according to the orientation of the grips of No. 8.

The tensile tester 8 has the same structure as that of the conventional example, and a gate-shaped frame 8b is erected on a base 8a.
A movable table 8c parallel to the base is provided in the middle of b so as to be able to move up and down, and the gripping tool 8 facing the fixed table 8a and the movable table 8c.
d and 8d are provided, and the load detection means 8e is provided on the opposite side of the movable table 8c from the gripping tool. The setting device 7 sends the test piece 1 so that the center of the test piece 1 and the center of the gripping tool 8d coincide with each other according to an instruction from the system control device 12. The gripping tool 8d has a movable gripping piece 8d '.
Therefore, the enlarged portion of the test piece 1 is gripped as in the conventional example.

The width measuring device 9 includes a vertical moving means 9a, a moving base 9b attached to the vertical moving means 9a, and a moving base 9b.
Projector 9 fixed so as to face both ends of b
c and a detector 9d, and a recess 9e formed between the light projector 9c and the detector 9d, the entire width measuring device 9 can be moved back and forth in the x-axis direction and the y-axis direction by a driving means (not shown). Has become.

When the test piece 1 is gripped between the gripping tools 8d, 8d of the tensile tester 8, the width measuring device 9 moves so that the test piece 1 enters the recess 9e. And the recess 9
The light beam is emitted from the light projector 9c to the test piece 1 located inside e.

FIG. 8 is a diagram for explaining this state. When the light beam having the width Wo is emitted from the light projector 9c, the light beam corresponding to the width W of the test piece 1 is blocked, and the detector 9d receives Wo-
The reduced luminous flux corresponding to W is detected. Therefore, W can be known from the output of the detector 9d.

The width W of the test piece 1 may be measured at one place, but in order to improve the measurement accuracy, the width of the test piece 1 is measured by scanning the movable table 9b in the longitudinal direction of the test piece. It measures and averages to improve accuracy. The system control device 12 calculates the cross-sectional area of the test piece 1 from the data of the width and the thickness described above.

FIG. 9 shows a non-contact type strain measuring device 10. In the test piece 1 shown in (a), the gripping tools 8d and 8d are omitted for convenience of description in a state where the test piece 1 is set in the tensile tester 8. A camera 10a is provided with a sensor 10b including a CCD area sensor and a CCD line sensor arranged in the z-axis direction on the image plane. The optical axis of the camera 10a is
The test piece 1 has an angle α with respect to the surface on which the marked lines D1 and D2 are drawn, and is oriented orthogonal to the longitudinal axis of the test piece 1.

The camera 10a photographs the surface of the test piece 1 including the marked lines D1 and D2, which has the coating portion, and forms an image on the sensor 10b. FIG. 9B is a diagram showing the output of each element of the sensor 10b. As can be seen from the figure, the elements in the portion corresponding to the coating portion have a larger overall output than the elements other than the coating portion, and the elements C1 and C1 corresponding to the marked lines D1 and D2.
It can be seen that the output of C2 shows a minimum value. From the distance between the two elements C1 and C2 exhibiting this minimum value, the actual distance between the marked lines D1 and D2 can be known, and the strain can be measured.

The test piece 1 in a state where the test piece 1 is held between the grips 8d and 8d of the tensile tester 8 and no load is applied.
The width and the distance between the marked lines are measured, and when the measurement is completed, the data is registered in the system control device 12, and the width measuring device 9 is separated from the tensile tester 8 and retracted to the original position. Then, the tensile test is performed according to the test conditions registered in the system controller 12. That is, the movable table 8c starts to rise and applies a tensile load to the test piece 1. The load detecting means 8e detects the tensile load one by one and sends the data to the system controller 12. Further, the non-contact type strain measuring device 10 restarts the measurement of the distance between the marked lines D1 and D2, obtains the elongation corresponding to the tensile load one by one, and sends the data to the system control device 12. The system controller 12 organizes necessary data and graphs from these data, for example, creating a stress-strain diagram.

When the movable table 8c continues to rise, the test piece 1 is eventually broken, the movable table stops, and the tensile test is completed. After that, the hand 7i of the setting device 7 first receives the test piece held by the upper gripping tool 8d,
The test piece is placed in the box of the collecting section 11, and then the test piece is received from the lower gripping tool 8d and put into the collecting section 11. With the above, the tensile test for one test piece is completed, each device returns to the initial state, and the above-described operation is repeated for the next test piece, and it can be performed until the laminated body disappears.

[0046]

As described above, according to the present invention,
In the automatic tensile tester, it is possible to automatically mark a mark on the test piece and set it on the tester.By measuring the distance between the marks, elongation can be automatically measured without contact. it can. All that is required for manual intervention is to register each data on the test piece, load it into the supply device, and dispose of the tested product.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of an automatic tensile test device of the present invention.

FIG. 2 is a perspective view showing a configuration of a supply device.

FIG. 3 is a perspective view showing a configuration of a transfer device.

FIG. 4 is a perspective view showing a configuration of a thickness measuring device.

FIG. 5 is a perspective view showing a configuration of a coating device.

FIG. 6 is a perspective view showing a configuration of a marking device.

FIG. 7 is a perspective view showing configurations of a setting device, a width measuring device, and a tensile tester.

FIG. 8 is a diagram illustrating an operation of the width measuring device.

FIG. 9 (a) is a diagram showing a configuration of a non-contact strain measuring device,
(b) is a diagram showing an output state of the sensor element.

FIG. 10 is a perspective view showing a configuration of a conventional automatic tensile test device.

11 is a perspective view showing a state where the gripping tool in the tensile tester of FIG. 10 grips a test piece.

[Explanation of symbols]

 1 Test Piece 2 Feeding Device 3 Conveying Device 4 Thickness Measuring Device 4d Length Measuring Device 5 Coating Device 5d Coating Device 5f Driving Device 6 Marking Device 63f Marking Needle 63 Driving Device 7 Setting Device 8 Tensile Testing Machine 8d Grip Tool 10 Non-contact Type Strain measuring device

Continuation of front page (51) Int.Cl. ⁶ Identification number In-house reference number FI Technical indication location G01N 1/28 (72) Inventor Yuzo Ishii 202 Kitajima-cho, Kitajima-cho, Toyohashi-shi, Aichi Stock Company Tokyo Testing Machine Manufacturing Toyohashi Inside the factory (72) Inventor Hirotada Kawai 202 Kitajima, Kitajima-cho, Toyohashi-shi, Aichi Stock Company Tokyo Testing Machine Works Toyohashi Factory

Claims (5)

[Claims] 1. A supply device for arranging and stacking a plurality of test pieces, and a setting device for directly or indirectly supplying one test piece from the supply device and setting the test piece on a tensile tester. In the automatic tensile test device for measuring the physical properties of the test piece by generating a strain by applying a load to the set test piece, between the supply device and the setting device, a coating device for coating the test piece with a coating material, A marking device for writing two parallel marking lines orthogonal to the load direction on the portion where the paint is applied, and an image of the set test piece is copied between the two marking lines. An automatic tensile testing device, which is provided with a non-contact type strain measuring device that measures the distance between the two and calculates the strain of the test piece. 2. The applicator comprises an applicator base for holding both ends of the test piece and fixing them in place, an applicator for applying paint, and a drive device for moving the applicator. The automatic tensile test device according to claim 1. 3. The marking device comprises a fixing base for fixing the test piece in a fixed position, a marking needle for marking a mark on a paint coating device of the test piece, and a driving device for moving the marking needle. The automatic tensile test device according to claim 1. 4. The automatic tensile testing device according to claim 3, wherein the marking needle driving means is capable of moving the marking needles in x, y, and z-axis directions orthogonal to each other. 5. The supplying device, the coating device, the marking device, and the setting device are arranged along a conveying path of one conveying device, and the conveying device can sequentially convey a test piece to each device. The automatic tensile test device according to claim 1.