CN101957286B - Novel material testing machine - Google Patents

Novel material testing machine Download PDF

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Publication number
CN101957286B
CN101957286B CN2010101499377A CN201010149937A CN101957286B CN 101957286 B CN101957286 B CN 101957286B CN 2010101499377 A CN2010101499377 A CN 2010101499377A CN 201010149937 A CN201010149937 A CN 201010149937A CN 101957286 B CN101957286 B CN 101957286B
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China
Prior art keywords
screw
chuck
testing machine
ess
compression
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CN2010101499377A
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Chinese (zh)
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CN101957286A (en
Inventor
冯爱新
徐传超
曹宇鹏
孙淮阳
王俊伟
聂贵锋
周鹏程
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江苏大学
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Priority to CN2010101499377A priority Critical patent/CN101957286B/en
Publication of CN101957286A publication Critical patent/CN101957286A/en
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Publication of CN101957286B publication Critical patent/CN101957286B/en

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Abstract

The invention relates to a novel material testing machine, which consists of four parts, namely, a control system, a detection system, a tension, compression and torsion system and a bending system. In the control system, an industrial personal computer controls a motion control card through a software system, so that the motion control card drives a stepper motor to rotate by a shaft coupling and then drive a first worm, a second worm and a lifting platform to move to realize motion control. The detection system consists of an STSS-1 stress-strain module and a loading sensor. The tension, compression and torsion system consists of a shaft, a movable base and a pair of round four-jaw chucks, wherein the two ends of the shaft are provided with threads of which screwing directions are opposite; the movable base is in threaded connection with the shaft; and the pair of round four-jaw chucks is fixed on the movable base. The bending system is used for clamping the lifting platform which can move up and down on the upper surface of the middle part of a fixed base; and a loading head is arranged on the lifting platform. The novel material testing machine realizes tests in the two-way stretch, compression and torsion of work pieces, and can realize various combined two-way or one-way tests.

Description

A kind of new material testing machine

Technical field

The present invention relates to a kind of Material Testing Machine that can carry out combination experiment.Be particularly related to a kind of simple in structure, multiple functional and can carry out the Material Testing Machine that two-way loading and combined type load.

Background technology

Along with developing rapidly of industrial technology; Various mechanical properties for material are measured; As stretch, compress, reverse and the measurement of bending property from scientific research to teaching, militaryly to various fields such as civilian, be widely used to industry, industry, yet existing Material Testing Machine because self design, physical dimension etc. limit its range of application, it presents two extremely; A kind of is the testing equipment that can only realize single test method, and can't satisfy the test of some associativities.Another kind is the multifunctional material testing machine, and its mechanism is huge, complex structure, involve great expense, and has seriously limited the popularization and application of Material Testing Machine.

The exemplary material testing equipment is hydraulic universal material testing machine and electronic universal material testing machine at present.Existing material test function is carried out unilateral stretching, is compressed, reverses and experiment such as bending material, can satisfy most of requirement of experiment, but have the experiment of specific (special) requirements to realize to two-way tension and compression etc.And in practical application, there is following problem:

1, huge, big, the complex structure that takes up room of the mechanism of equipment, the equipment rate height that breaks down needs special technician to solve in the use.

2, equipment manufacturing cost is expensive, and cost of use and maintenance cost are higher, limits its application in certain occasion.

3, existing Material Testing Machine can't realize two-way stretch, the experiment of associativity such as compress, reverses, and can not satisfy some specific requirement of experiment.

Summary of the invention

Patent of the present invention has designed a kind of take up room little (about 60 * 30 * 25), mechanism is simple, cheap and can carry out various associativity testing machines.The creationary realization of this experimental apparatus to two-way stretch, bi-directional compression and the bidirectional torsion of test specimen etc. the associativity test of various particular requirements.

This device is made up of control system, detection system, twisting tension and compression system, bending system four major parts,

Control system is to pass through software systems controlled motion control card by industrial computer, makes motion control card drive the stepping motor rotation and behind shaft coupling, drives first worm screw, second worm screw, hoistable platform motion respectively, realizes motion control.

Detection system is made up of STSS-1 ess-strain module and load sensor; Can obtain the ess-strain signal through the load sensor that loads the position during loading; Sensor sends the ess-strain signal to the ess-strain module then, realizes detecting in real time the variation of ess-strain.

The twisting tension and compression system by two ends be threaded the opposite axle of rotation direction, with spool become thread connection movable support, a pair of circular four-jaw chuck that is fixed on the movable support form.Because axle two ends thread rotary orientation is opposite, i.e. the movable support in the rotation axis of axle drive two ends moves realizes two-way tension and compression, realizes bidirectional torsion through rotating the worm screw on the movable support in two ends and driving two ends chuck rotation.

Said circular four-jaw chuck comprises chuck, it is characterized in that: clip designs becomes driver chuck handgrip shape, so that can effectively increase clamping torque when workpiece stretched.The chuck front end is equipped with set screw.Its function is to form hinged point when set screw contacts with surface of the work, directly directly clamps with chuck when reversing to get final product, and set screw influences the clamping dynamics away from clamping face in order to avoid form hinge.

Bending system is to be the hoistable platform that can move up and down of clamping at fixing support middle part upper surface, and hoistable platform is provided with loading head.

Said hoistable platform is made up of a square platform, four connecting rods and loading head, is connected with screw mandrel through bolt on the connecting rod, drives hoistable platform through the handwheel on the rotary screw rod and realizes, and the cylindrical loading head that promotes the connecting rod top loads.

The present invention is compared to the advantage of existing Material Testing Machine:

1, testing machine simple in structure, point is little with the space, equipment principle is simply distinct, the fault occurrence rate is low.

2, equipment manufacturing cost is cheap, need not other maintenance and cost of use, can expand its range of application and use occasion.

3, the present invention can accomplish a series of composite test in a clamping of workpiece, need not to adjust workpiece again, satisfies test request greatly and improves measuring accuracy.

4, creationary realization Material Testing Machine is to the two-way stretch of workpiece, the test of compressing and reversing, and can realize that various combined types are two, single pass test.Solved the irrealizable problem of existing equipment.

Description of drawings

The structured flowchart and the description of drawings of apparatus of the present invention specific embodiment are following:

Fig. 1 Material Testing Machine one-piece construction figure

The crooked loading system front view of Fig. 2

The crooked loading system side view of Fig. 3

Fig. 4 four-jaw chuck front view

Fig. 5 four-jaw chuck side view

The crooked synoptic diagram that loads of Fig. 6 test specimen

Fig. 7 test specimen reverses synoptic diagram

Fig. 8 test specimen tension and compression synoptic diagram

1, motion control card; 2, stepping motor; 3, shaft coupling; 4, first worm screw; 5, first worm gear; 6, rolling bearing; 7, axle head baffle plate; 8, bearing holder (housing, cover); 9, sleeve; 10, second worm screw; 11, second worm gear; 12, movable support; 13, hoistable platform; 14, handwheel; 15 screw mandrels; 16, loading head 17, connecting rod; 18, gib screw; 19, four-jaw chuck; 20, set screw; 21, chuck; 22, swing pinion; 23, clamping screw; 24, fixing threaded hole; 25, rail plate; 26, load sensor; 27, axle; 28, support; 29, industrial computer; 30:STSS-1 ess-strain module; 31, square platform.

Embodiment

Said the present invention is made up of Fig. 1 Material Testing Machine one-piece construction figure, the crooked loading system front view of Fig. 2, the crooked loading system side view of Fig. 3, Fig. 4 four-jaw chuck front view, Fig. 5 four-jaw chuck side view, and it has also comprised Fig. 6, Fig. 7, the concrete test specimen method of clamping of Fig. 8 synoptic diagram.Its load mode is divided into automatic control loaded and two kinds of manual control loaded.

The concrete function implementation of patent experimental machine of the present invention is following:

One, control system: the concrete implementation of control system is through the required realization parameter value of input on the corresponding program interface of industrial computer 29; Send control signal by software systems to motion control card 1 then; The rotation of motion control card 1 processing control information rear drive stepping motor 2, motor 2 drive first worm screw 4, second worm screw 10, screw mandrel 15 respectively and rotate and realize motion controls after shaft coupling 3 and kinematic train.

Two, detection system: the concrete implementation of detection system is made up of STSS-1 ess-strain module 30 and load sensor 26; Can obtain the ess-strain signal through the load sensor 26 that loads the position during loading; Load sensor 26 sends the ess-strain signal to STSS-1 ess-strain module 30 then, and the ess-strain module by signal is handled ess-strain is realized demonstrating in real time in the back on industry control system 29 variation.

Three, twisting tension and compression system: at first must workpiece be fixed on the four-jaw chuck 19.

The concrete implementation of 1) tension and compression system is the size through industrial computer 29 required measurement data of input in corresponding program interface; And to motion control card 1 transmission control signal; Control signal is handled 2 work of rear drive stepping motor and is driven shaft coupling 3 rotary work together through motion control card 1; Rotate through kinematic train rear drive first worm screw 4, and drive 5 rotations of first worm gear, first worm gear 5 drives rolling bearing 6 rotations of axle 27 around two ends.The axis of rolling 6 is to be fixed on the axle 27 through axle head baffle plate 7, bearing holder (housing, cover) 8 and sleeve 9.Axle 27 left ends are left-hand thread (LHT), and right-hand member is a right-hand thread.In its when rotation, drive the square movable support in two ends simultaneously inwardly or to outer rail plate 25 moving linearlies.Workpiece is put clamping on four-jaw chuck 19, can accomplish two-way stretch and bi-directional compression, like Fig. 8 to workpiece.The operating path of manual control system is: the handwheel on the rotary worm 4.Carry out two-way loading through worm screw 4, worm gear 5, axle 27 drive activity supports mobile.Add moment size by load sensor 26 through on industrial computer, showing constantly after the signal Processing.

2) the concrete implementation of torsion system: through the size of industrial computer 29 required measurement data of input in corresponding program interface; And to motion control card 1 transmission control signal; Control signal is handled 2 work of rear drive stepping motor and is driven shaft coupling 3 rotary work together through motion control card 1; Rotate and drive 11 rotations of second worm gear through kinematic train rear drive second worm screw 10; Second worm gear 11 is fixed on the multidiameter in the square movable support, and second worm gear 11 drives the multidiameter rotation and drives circular four-jaw chuck 19 rotations simultaneously, and workpiece is realized that rotation loads.Manual control system is the handwheel of rotation on second worm screw 10, drives second worm gear 11, multidiameter, circular four-jaw chuck 19 and loads.Add moment size by load sensor 26 through on industrial computer 29, showing in real time after the signal Processing.

Four, crooked loading system running route:

At first the workpiece two ends are fixed on the circular four-jaw chuck; Auto-loading system is the size through industrial computer 29 required measurement data of input in corresponding program interface; And to motion control card 1 transmission control signal; Control signal is handled 2 work of rear drive stepping motor and is driven shaft coupling 3 rotary work together through motion control card 1; After kinematic train, drive 13 times screw mandrels of hoistable platform 15 and rotate, screw mandrel 15 rotates drivening rod 17 and loads around the loading probe 16 that the fulcrum rotation moves up and down on the square platform 31 of promotion the position of lifting support 13.The manual loading system is that rotation hand wheel 14 drive screw mandrels 15 rotate, and screw mandrel 15 rotation drivening rods 17 rotate around fulcrum, hoistable platform are moved up and down and drive to load the 16 pairs of work loadings of popping one's head in, and this time load the two kinds of situation that are divided into:

1) semi-girder loads: workpiece one end is fixed on any chuck 19 on the movable support 12; Rotary screw 23 drives chuck 21 and makes its clamping work pieces after gear 22 transmissions; The set screw 20 of this moment avoids screw end to touch workpiece; Can make semi-girder one end clamped and make it receive the fixed constraint counter-force like this, as shown in Figure 7.Regulate the square platform high and low position on the lifting support 13, probe 16 can be to workpiece loading, and move left and right lifting support 13 can load the workpiece diverse location.

2) free beam loads: the workpiece two ends are fixed on the chuck 19 on the movable support 12.Because an end of free beam is that a fixing end is hinged.A fixing end set screw 20 avoids touching workpiece, and rotary screw 23 drives chuck 21 after gear 22 transmissions get final product its clamping work pieces.And a hinged end withstands on the workpiece rounded nose of set screw 23 lower ends, makes its formation hinged, as shown in Figure 6.According to Workpiece length different adjustment activity support 12.The position of left and right adjusting activity support can load the diverse location of free beam.Add moment size by the load sensor 26 on the probe 16 through on industrial computer, showing constantly after the signal Processing.

The present invention is in compound experiment: two kinds and two or more loading systems are moved simultaneously and can be realized specific compound requirement of experiment.

Claims (3)

1. a new material testing machine is characterized in that: are made up of control system, detection system, twisting tension and compression system, bending system four major parts;
Control system is through software systems controlled motion control card (1) by industrial computer (29); Make motion control card (1) drive stepping motor (2) rotation and behind shaft coupling (3), drive first worm screw (4), second worm screw (10), hoistable platform (13) motion respectively, realize motion control;
Detection system is made up of STSS-1 ess-strain module (30) and load sensor (26); Can obtain the ess-strain signal through the load sensor (26) that loads the position during loading; Load sensor (26) sends STSS-1 ess-strain signal to ess-strain module (30) then, realizes detecting in real time the variation of ess-strain;
The twisting tension and compression system is threaded the opposite axle (27) of rotation direction, is formed with a movable support (12) that connects, a pair of circular four-jaw chuck (19) that is fixed on the movable support (12) through screw thread by two ends; Because axle (27) two ends thread rotary orientation is opposite; Axle (27) drives the two-way tension and compression of the mobile realization of the movable supports in two ends (12), rotates the realization bidirectional torsion through rotating second worm screw (10) on the movable supports in two ends (12) and driving two ends chuck (19);
Bending system is a clamping at the fixing hoistable platform that can move up and down (13) of support middle part upper surface, and hoistable platform (13) is provided with loading head (16).
2. the described new material testing machine of claim 1; It is characterized in that: said hoistable platform (13) is made up of a square platform (31), four connecting rods (17) and loading head (16); Connecting rod (17) is gone up and is connected with screw mandrel (15) through bolt; Drive hoistable platform (13) through the handwheel (14) on the rotary screw rod (15) and realize, the cylindrical loading head (16) that promotes connecting rod (17) top loads.
3. the described new material testing machine of claim 1; It is characterized in that: said circular four-jaw chuck (19) comprises chuck (21), and chuck (21) is designed to driver chuck handgrip shape, so that can effectively increase clamping torque when workpiece stretched; Chuck (21) front end is equipped with set screw (20); Form hinged point when set screw (20) contacts with surface of the work, directly get final product with direct clamping of chuck (21) when reversing, set screw (20) influences the clamping dynamics away from clamping face in order to avoid form hinge.
CN2010101499377A 2010-04-16 2010-04-16 Novel material testing machine CN101957286B (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115814B (en) * 2013-01-21 2015-01-07 太原科技大学 Determination method for bending moment of extra-thick plate
CN104422586B (en) * 2013-08-27 2017-08-22 广州汽车集团股份有限公司 A kind of shutter member stiffness test loading device
CN103969106B (en) * 2014-04-15 2016-03-02 上海理工大学 Tension-torsion composite fatigue testing table
CN104101545B (en) * 2014-06-25 2016-08-24 中国海洋石油总公司 The bending stiffness of a kind of flexible pipe and torsion rigidity measurer
CN105372127A (en) * 2014-08-22 2016-03-02 郑全山 Tension-compression and torsion composite loading testing machine
CN104677726B (en) * 2015-02-09 2017-05-31 四川大学 The spacing tension and compression cyclic test rock sample fixing device of scroll chuck
CN108982212A (en) * 2018-06-05 2018-12-11 东北大学 A kind of composite shaft tension and compression, bending, torsion, vibration integrated Testing Platform
CN111257133A (en) * 2020-02-26 2020-06-09 西安交通大学 Variable-temperature tension-torsion composite load material mechanical property in-situ testing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101692027A (en) * 2009-08-27 2010-04-07 哈尔滨工业大学 Universal material testing machine for variable rotating speed pump control hydraulic servo loading system
CN201852737U (en) * 2010-04-16 2011-06-01 江苏大学 Novel material testing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4390032B2 (en) * 2001-06-05 2009-12-24 株式会社島津製作所 Material testing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101692027A (en) * 2009-08-27 2010-04-07 哈尔滨工业大学 Universal material testing machine for variable rotating speed pump control hydraulic servo loading system
CN201852737U (en) * 2010-04-16 2011-06-01 江苏大学 Novel material testing machine

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