CN114414366A - Double-station tensile sample elongation after fracture measuring device - Google Patents

Double-station tensile sample elongation after fracture measuring device Download PDF

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Publication number
CN114414366A
CN114414366A CN202111599987.XA CN202111599987A CN114414366A CN 114414366 A CN114414366 A CN 114414366A CN 202111599987 A CN202111599987 A CN 202111599987A CN 114414366 A CN114414366 A CN 114414366A
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CN
China
Prior art keywords
sample
station
double
seat
measuring device
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Pending
Application number
CN202111599987.XA
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Chinese (zh)
Inventor
田广明
焦安杰
薛俊峰
王利
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Rizhao Steel Holding Group Co Ltd
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Rizhao Steel Holding Group Co Ltd
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Priority to CN202111599987.XA priority Critical patent/CN114414366A/en
Publication of CN114414366A publication Critical patent/CN114414366A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075—Strain-stress relations or elastic constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a double-station tensile sample elongation after fracture measuring device, belonging to a detection device, comprising a body and a controller with a display screen; the body comprises a base with two side plates, a sample loading unit and a measuring unit; the sample loading unit comprises a sample seat, a movable limiting block, a guide rod, a transmission screw and a hand wheel; the measuring unit comprises a linear slide rail, a clamping seat and an optical measuring module. Compared with the prior art, the test device has the characteristics of convenient butt joint, improved test efficiency, multiple purposes and reduced laboratory purchase cost.

Description

Double-station tensile sample elongation after fracture measuring device
Technical Field
The invention relates to a detection device, in particular to a measuring device suitable for measuring the elongation after fracture of a tensile sample.
Background
The elongation after fracture is one of the most basic mechanical property indexes of the steel material and is used for reflecting the energy of irreversible permanent deformation before the steel material is fracturedForce. Determining original gauge length L of sample in tensile test process0And measuring the gauge length Lu after fracture by using the formula A ═ Lu-L0)/L0X 100% the elongation after break of the sample was calculated.
The operation process in the prior art is as follows: determining L according to product standard0According to L0＝k√S0Calculating a proportional original gauge length or using a calibrated gauge length; secondly, marking the processed sample on an original gauge length instrument (or a scribing machine) of the metal tensile sample, wherein the marking accuracy is +/-1%; thirdly, after the test is finished, the broken parts of the test sample are carefully matched and connected together, so that the axes of the broken parts are positioned on the same straight line, and the front side of the side with the mark faces upwards, thereby facilitating the measurement; measuring Lu by using a vernier caliper, wherein the elongation after fracture is more than or equal to a specified value, the measurement is effective regardless of the position of the fracture position, and the maximum value of Lu is measured in a parallel length range; using formula A ═ Lu-L0)/L0Calculating the elongation after fracture of the sample by multiplying 100%; sixthly, inputting the elongation after fracture on the test interface of the tensile tester. In the third step, when measuring the broken gauge length Lu, a laboratory directly splices two sections of broken samples together for measurement, and the broken rod-shaped samples are easy to roll, so that the broken parts cannot be ensured to be in close contact, the axes are on the same straight line, the broken interfaces are irregular, the contact gap is large, and the measurement error is easy to occur. And the elongation after fracture is manually measured and calculated, the efficiency is low, and the accuracy cannot be ensured.
Disclosure of Invention
The technical task of the invention is to provide a double-station tensile sample elongation after fracture measuring device aiming at the defects of the prior art, so that the manual intervention is reduced, and the accuracy and the efficiency of test data are improved.
The technical scheme for solving the technical problem is as follows: the utility model provides a duplex position tensile sample elongation after fracture measuring device which characterized in that: comprises a body and a controller with a display screen; the body comprises a base with two side plates, a sample loading unit and a measuring unit; the sample loading unit comprises a sample seat, a movable limiting block, a guide rod, a transmission screw and a hand wheel; two ends of the sample seat are connected with the two side plates; two ends of the guide rod are connected with the two side plates, one end of the transmission screw rod is rotatably connected with one side plate, and the other end of the transmission screw rod penetrates through the other side plate to be clamped with a central hole of the hand wheel; the movable limiting block is provided with a sample seat through hole, a screw hole and a guide hole which respectively correspond to the magnetic seat, the transmission screw rod and the guide rod; the screw hole is in threaded connection with the transmission screw; the sample holder is provided with a double-station operating space and is respectively suitable for a bar sample and a plate sample; the measuring unit comprises a linear slide rail, a clamping seat and an optical measuring module, the clamping seat is connected with the linear slide rail in a sliding way, and the clamping seat is connected with the optical measuring module; two ends of the linear slide rail are connected with the upper ends of the two side plates; the optical measurement module is provided with a probe support with a through hole, and a measurement probe penetrates through the through hole; the tip of the measuring probe is a replaceable tip; the upper end of the measuring probe is provided with a handle, the lower section of the measuring probe is provided with a ring table, and springs are arranged at the lower ends of the ring table and the probe support; the optical measurement module is in data connection with the controller; the controller is in data connection with a computer terminal of the tensile testing machine;
furthermore, a station operation module is arranged on the sample seat.
Furthermore, the station operating module is a sample groove, the shape of the sample groove is V-shaped, and the opening angle of the sample groove is 120 degrees.
Furthermore, the station operation module is a sample positioning device.
Furthermore, the sample positioning device comprises two L-shaped clamping plates, screw holes are formed in the bottom surfaces of the clamping plates, strip-shaped slotted holes are formed in the sample seat, and the clamping plates and the sample seat are fixed through countersunk bolts after the position of a plate sample is determined;
furthermore, three grooves are formed in the bottom surface of the clamping plate.
Furthermore, a strip-shaped through hole is formed in the side plate on one side, a movable center is arranged in the side plate, and the other end of the movable center is in threaded connection with the countersunk head bolt.
Furthermore, the station operating module has magnetism.
Furthermore, a movable handle is arranged on the clamping seat.
Furthermore, a grating ruler is embedded in the linear slide rail; the optical measurement module is a grating linear displacement sensor.
Furthermore, the replaceable tip comprises a knife edge tip and a round tip type tip.
Compared with the prior art, the invention has the following outstanding beneficial effects:
1. the invention can measure the sample after tensile fracture, the sample is arranged on the base, the grating measuring probe is moved to read the numerical value, the elongation after fracture of the sample can be calculated, the elongation after fracture can be automatically uploaded to the tensile testing machine, the data is prevented from falling to the ground, the human intervention is reduced, and the accuracy and the high efficiency of the test data are improved;
2. the invention has convenient butt joint, improves the test efficiency and shortens the time for 1min for each measurement; the data is automatically acquired, the elongation after fracture is automatically calculated, the automatic uploading of the data is realized, and the detection efficiency and the data accuracy are improved;
3. the double-station operation space can measure the elongation of the rod-shaped and plate samples after fracture and can replace a conventional gauge length instrument; the measuring probe can also be used for marking and dotting instead of a marking machine and a dotting machine; one machine has multiple purposes, and the purchasing cost of a laboratory is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
FIG. 3 is a schematic diagram of the structure of the sample loading body of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the claimed embodiments. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the following embodiments, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art according to specific situations.
For better description, the left and right sides are set in fig. 1, and the side facing the operator is set to be front, and the reverse is set to be rear. It is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," "end," "side," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the claimed embodiments and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the claimed embodiments.
As shown in figures 1-3, the present invention includes a body and a controller 1 with a display screen.
The body comprises a base 3 with two side plates 2, a sample loading unit and a measuring unit.
The sample loading unit comprises a sample holder 4, a movable limiting block 5, a guide rod 6, a transmission screw 7 and a hand wheel 8.
The two ends of the sample seat 4 are connected with the two side plates 2. And a station operating module is arranged on the sample holder 4.
The two ends of the guide rod 6 are connected with the two side plates 2, one end of the transmission screw rod 7 is rotatably connected with one side plate 2, and the other end of the transmission screw rod penetrates through the other side plate 2 to be clamped with a central hole of the hand wheel 8.
The movable limiting block 5 is provided with a sample seat through hole, a screw hole and a guide hole which respectively correspond to the sample seat 4, the transmission screw 7 and the guide rod 6. The screw hole is in threaded connection with the transmission screw rod 7. The hand wheel 8 is rotated, so that the movable limiting block 5 can move along the guide rod 6, and the pre-tightening and gap eliminating of the sample are realized.
The sample holder 4 is provided with a double-station operation space and is respectively suitable for bar samples and plate samples. The present embodiment is configured to be left-right in fig. 1, but does not necessarily have a specific orientation configuration and operation. For convenience of description, the left side is referred to as "one side" and the right side is referred to as "the other side" in the following.
In this embodiment, the left-side station space of the sample holder 4 is suitable for bar samples (not shown in fig. 1, but shown in fig. 3 as the sample 14). The station operation module in the left station space is a sample groove 9, the sample groove 9 is V-shaped, the opening angle of the sample groove is 120 degrees, and a rod-shaped sample can be conveniently placed.
The station space at the right side of the sample seat 4 is suitable for plate samples, and the station operation module is a sample positioning device 10. The sample positioning device 10 is used for clamping and adjusting the position of the plate sample, and ensuring that the center lines of the samples with different widths are coincident with the track of the measuring probe 17.
In this embodiment, the sample positioning device 10 includes two "L" shaped clamping plates, the bottom surfaces of the clamping plates have screw holes, the sample holder 4 has slotted holes, and after the position of the plate sample is determined, the clamping plates are fixed to the sample holder 4 by countersunk bolts. In the optimized scheme, the bottom surface of the clamping plate is provided with three grooves which can contain adsorbed iron oxide scale powder.
The left side plate 2 is provided with a strip-shaped through hole, a movable center 11 is arranged in the through hole, the position of the movable center 11 is matched with the cross section of a standard bar sample by leaving a processing center hole, and the cross section of the bar sample can be automatically aligned when the gap is eliminated by pre-tightening.
The other end of the live center 11 is in threaded connection with a countersunk head bolt 12, and the countersunk head bolt 12 is used for locking the live center 11 so as to adjust the height of the position according to the diameter of the sample 14.
The movable limiting block 5 is steplessly adjustable through a transmission screw 7, a hand wheel 8 is configured, operation is convenient, a guide rod 6 is attached, and operation is light and stable.
The station operation module and the sample holder 4 can be integrated or can be detachable and temporarily installed according to the detection requirement. The former is suitable for most detection operations, the specification of a sample is fixed, and the latter has wider length of a station length and wider application range. And the sample holder through hole is aligned with the position-accessible manipulator module and the sample holder 4.
The station operation module and the sample holder 4 have magnetism in the optimized scheme, can adsorb a metal sample, and are convenient to position.
The measuring unit comprises a linear slide rail 13, a clamping seat and an optical measuring module 15, wherein the linear slide rail 13 is connected with the clamping seat in a sliding manner, and the clamping seat is connected with the optical measuring module 15. The clamping seat is provided with a movable handle 16.
Two ends of the linear slide rail 13 are connected with the upper ends of the two side plates 2. In this embodiment, the linear slide rail 13 is embedded with a grating ruler.
The optical measurement module 15 is a grating linear displacement sensor, and the accuracy of the sensor can reach +/-0.002 mm. The precise linear slide rail 13 is used as a sensor for measuring the movement guide, the movement is smooth, and the precision is high.
The optical measuring module 15 has a probe holder 19 with a through-opening, through which a measuring probe 17 passes.
The tip of the measuring probe 17 is a replaceable tip, and the tip is provided with two sets: one set is a knife edge tip used for meeting the measurement of the marking line in the original marking and scribing mode; the other set is a round tip which is used for measuring the original marking point in a marking mode, is suitable for point marking and is made of high-hardness alloy. The tip end part and the probe handle are assembled in a shaft sleeve mode, a jackscrew is arranged on the side face of the tip, the tip can be replaced by adjusting the jackscrew, and a main structure does not need to be replaced.
The upper end of the measuring probe 17 is a handle, the lower section of the measuring probe is provided with a ring table, and the lower ends of the ring table and the probe support are provided with springs 18. In use, the cap of the handle is pulled up, the hand is released and the spring 18 is reset to strike the sample. According to the material characteristics of the sample, the force acting on the tip is changed by adjusting the height of the pull-up handle, and the damage to the sample is reduced to the maximum extent.
The optical measurement module 15 is in data connection with the controller 1, any position of the measurement probe 17 can be set as a starting point, the post-fracture gauge length data on the controller 1 is cleared, the measurement terminal point is determined according to the original gauge length, and the post-fracture gauge length measurement is completed by clicking a confirmation button.
The controller 1 has a calculation function, an original gauge length is input on an operation panel of the controller 1, and the controller 1 can calculate the elongation after fracture according to the post-fracture gauge length and the original gauge length transmitted by the optical measurement module 15.
Controller 1 and tensile test machine computer terminal data connection, the elongation data can transmit to computer terminal after breaking, realize that data does not fall to the ground, guarantee authenticity, the accuracy of data. In the traditional method, the post-fracture gauge length needs to be manually measured, and then the post-fracture elongation is calculated and manually input into a computer terminal.
The data connection mode can be wired connection or wireless connection.
Taking a bar-shaped sample as an example, the specific use method of the invention is as follows:
firstly, according to the length of a sample, a hand wheel 8 is rotated to adjust the work station to a proper distance;
secondly, placing the sample in a V-shaped groove, wherein one end of the sample is tightly propped against a movable center 11, and an adjusting hand wheel 8 pushes a movable limiting block 5 to clamp the other end of the sample;
thirdly, determining an original gauge length according to the standard, recording the original gauge length to the controller 1, and resetting the dotting mark by virtue of the elasticity of the spring 18 by pulling the handle through the measuring probe 17 adopting a round tip;
fourthly, placing the broken sample in a V-shaped groove, and adjusting a hand wheel 8 to ensure that the fracture is tightly matched without a gap;
and fifthly, moving the measuring probe 17, aligning with one end of the gauge length mark, clearing, moving to the other end of the mark, updating the value of the display Lu, reading the elongation after breakage, and automatically uploading to the interface of the tensile testing machine after the error is confirmed.
It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides a duplex position tensile sample elongation after fracture measuring device which characterized in that: comprises a body and a controller with a display screen; the body comprises a base with two side plates, a sample loading unit and a measuring unit; the sample loading unit comprises a sample seat, a movable limiting block, a guide rod, a transmission screw and a hand wheel; two ends of the sample seat are connected with the two side plates; two ends of the guide rod are connected with the two side plates, one end of the transmission screw rod is rotatably connected with one side plate, and the other end of the transmission screw rod penetrates through the other side plate to be clamped with a central hole of the hand wheel; the movable limiting block is provided with a sample seat through hole, a screw hole and a guide hole which respectively correspond to the magnetic seat, the transmission screw rod and the guide rod; the screw hole is in threaded connection with the transmission screw; the sample holder is provided with a double-station operating space and is respectively suitable for a bar sample and a plate sample; the measuring unit comprises a linear slide rail, a clamping seat and an optical measuring module, the clamping seat is connected with the linear slide rail in a sliding way, and the clamping seat is connected with the optical measuring module; two ends of the linear slide rail are connected with the upper ends of the two side plates; the optical measurement module is provided with a probe support with a through hole, and a measurement probe penetrates through the through hole; the tip of the measuring probe is a replaceable tip; the upper end of the measuring probe is provided with a handle, the lower section of the measuring probe is provided with a ring table, and springs are arranged at the lower ends of the ring table and the probe support; the optical measurement module is in data connection with the controller; and the controller is in data connection with a computer terminal of the tensile testing machine.
2. The double-station tensile specimen post-fracture elongation measuring device according to claim 1, characterized in that: and a station operating module is arranged on the sample seat.
3. The double-station tensile specimen post-fracture elongation measuring device according to claim 2, characterized in that: the station operation module is a sample groove, the sample groove is V-shaped, and the opening angle of the sample groove is 120 degrees.
4. The double-station tensile specimen post-fracture elongation measuring device according to claim 2, characterized in that: the station operation module is a sample positioning device; the sample positioning device comprises two L-shaped clamping plates, screw holes are formed in the bottom surfaces of the clamping plates, strip-shaped slotted holes are formed in the sample seat, and the clamping plates and the sample seat are fixed through countersunk bolts after the position of a plate sample is determined.
5. The double-station tensile specimen elongation after fracture measuring device according to claim 4, characterized in that: the bottom surface of the clamping plate is provided with three grooves.
6. The double-station tensile specimen post-fracture elongation measuring device according to claim 1, characterized in that: one side plate is provided with a strip-shaped through hole, a movable center is arranged in the side plate, and the other end of the movable center is in threaded connection with the countersunk head bolt.
7. The double-station tensile specimen post-fracture elongation measuring device according to claim 2, characterized in that: the station operation module is magnetic.
8. The double-station tensile specimen post-fracture elongation measuring device according to claim 1, characterized in that: the clamping seat is provided with a movable handle.
9. The double-station tensile specimen post-fracture elongation measuring device according to claim 1, characterized in that: the linear slide rail is embedded with a grating ruler; the optical measurement module is a grating linear displacement sensor.
10. The double-station tensile specimen post-fracture elongation measuring device according to claim 1, characterized in that: the replaceable tip comprises a knife edge tip and a round tip type tip.
CN202111599987.XA 2021-12-24 2021-12-24 Double-station tensile sample elongation after fracture measuring device Pending CN114414366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111599987.XA CN114414366A (en) 2021-12-24 2021-12-24 Double-station tensile sample elongation after fracture measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111599987.XA CN114414366A (en) 2021-12-24 2021-12-24 Double-station tensile sample elongation after fracture measuring device

Publications (1)

Publication Number Publication Date
CN114414366A true CN114414366A (en) 2022-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111599987.XA Pending CN114414366A (en) 2021-12-24 2021-12-24 Double-station tensile sample elongation after fracture measuring device

Country Status (1)

Country Link
CN (1) CN114414366A (en)

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