CN1414367A

CN1414367A - Lever type fixed load material testing machine

Info

Publication number: CN1414367A
Application number: CN 01133358
Authority: CN
Inventors: 宋玉泉; 管志平
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-27
Filing date: 2001-10-27
Publication date: 2003-04-30
Anticipated expiration: 2021-10-27
Also published as: CN1207551C

Abstract

A lever type fixed-load material tester belongs to the area of instruments and meters in the material science and the machine manufacturing technique. The experimental machine is composed of machine frame, lever, system for putting on the load, displacement sensor, specimen clamp and heating furnace. The experimental machine possesses the advantages of the fixed load can be put on steadily and accurately without the bad influence on the sensitivity of the material to be tested. The invention provides the features of easy for operation, no special technique requirement to the operators, low cost, stable performance and easy for use and maintenance.

Description

Lever type fixed load material testing machine

Technical field:

The invention belongs to the instrument field of material science and Machine Manufacturing Technology, relate to a kind of in the innovation of deciding arbitrarily the testing machine of test material performance and deformation rule under the loading.

Background technology:

The structure of existing universal testing machine and control system complexity, the cost height, and need the professional and technical personnel could safeguard use, but material is in Plastic Forming and what in use bear is load, therefore be the deformation rule and the mechanical property of research material under loading, and need not the cost height, baroque universal testing machine, especially for superplastic material, because it has very strong sensitivity of strain rate, and existing universal testing machine all is to adopt closed-loop control to realize deciding applying of load, the measurement of load is again to adopt pulling force sensor, this just must cause the feedback fluctuation that applies because of load to cause the fluctuation of load measurement or record, so just influenced the reliability of test findings.

Technology contents:

Technical matters to be solved by this invention is: provide a kind of energy to stablize imposed load, accurate recording data, simple in structure, easy operating, cost is low, and can study conventional material and superplastic material at the mechanical property of loading and the lever type fixed load material testing machine of deformation rule.

Ultimate principle of the present invention as shown in Figure 1, if hanging fixedly counterweight F at the A of lever 1 end, the B end of lever 1 just has pulling force P to act on the sample 5 by linear ball bearing 4 by connecting link 3, but if fulcrum 2 along continuous straight runs move left and right, to guarantee AOcos θ ₁: OBcos θ ₁=AOcos θ ₂: OBcos θ ₂=AO:OB just can make sample 5 bear

P = \frac{AO}{OB} \cdot F

The effect of vertical orientation pulling force.

Apparatus of the present invention are as follows:

Testing machine is by support, column, testing machine fixed cross beam and guide rail fixed cross beam are formed, column is connected with the testing machine fixed cross beam with support, the guide rail fixed cross beam is fixed on the column, guide rail and fulcrum ratio coaster are housed on it, on coaster, be provided with cutting edge, blade on cutting edge and the lever agrees with, the left end of lever also is provided with cutting edge, the low order end of lever is provided with counterweight balance and adjusts piece, middle part at lever is provided with blade by different proportion, blade can be placed on the cutting edge of fulcrum ratio coaster according to required different proportion, below the guide rail fixed cross beam, linear ball bearing is housed, connecting link and linear ball bearing are slidingly matched, the upper end of connecting link is connected with lever by hinge, the lower end of connecting link is connected with the upper end of length adjuster, the lower end of length adjuster is connected with upper grip, lower chuck and lower chuck seat are connected through the hinge, base of the carrier head is fixed on the support, right-hand member at lever is connected with displacement drive link lower end hinge, the upper end of displacement drive link is connected with displacement transducer, heating furnace is contained in by hinge on the column of testing machine, is provided with several groups of counterweights of Different Weight in charger.

Counterweight is fixed on sleeve and the pillar with the inserted link of counterweight button when not loading, and counterweight seat and scale pan all are fixed on the load bar, and the blade of load bar upper end and the cutting edge of lever left end agree with.

The invention has the beneficial effects as follows:

1. can stablize, accurately apply and decide load arbitrarily, can not be subjected to that existing universal testing machine utilizes the closed-loop control imposed load and being exerted an adverse impact by the structure sensitive property of test material.

2. utilize displacement transducer can accurately measure the deflection of sample under loading.

3. load that applies and the deformation rule between the displacement can directly be imported computing machine and handle.

4. easy and simple to handle, operating personnel there is not special technical requirement.

5. cost is low, stable performance, easy to use and maintenance.

Description of drawings:

Fig. 1 is the schematic diagram of lever type fixed load material testing machine of the present invention.

Fig. 2 .1 is the front elevation of the main machine structure of lever type fixed load material testing machine of the present invention;

Fig. 2 .2 is the A-A view of Fig. 2 .1.

Fig. 3 .1 is the charger front elevation of lever type fixed load material testing machine of the present invention;

Fig. 3 .2 is the B-B view of Fig. 3 .1.

Fig. 4 .1 is the front elevation that the inserted link of the counterweight button of lever type fixed load material testing machine charger of the present invention is in the insertion state;

Fig. 4 .2 is the front elevation that the inserted link of the counterweight button of lever type fixed load material testing machine charger of the present invention is in the state of extracting.

Below in conjunction with accompanying drawing the present invention is further described.

Wherein: 1 lever; 2 fulcrum ratio coasters; 3 connecting links; 4 linear ball bearings; 5 samples;

6 chargers; 7 supports; 8 columns; 9 guide rail fixed cross beams; 10 guide rails; 11 testing machines are solid

Decide crossbeam; 12 displacement transducers; 13 blades; 14 displacement drive links; 15 balances are adjusted piece; 16

Stop nut; 17 length adjusters; 18 heating furnaces; 19 hinges; 20 upper grips; 21 times folders

Head; 22 lower chuck seats; 23 loader bases; 24 loader pillars; 25 weight groups; 26 is solid

Decide plate; 27 load bars; 28 scale pans; 29 counterweight seats; 30 counterweight buttons; 31 loader covers

Tube; 32 button boxes; 33 supporting disks; 34 spring dampers; 35 top boards; 36 push rods; 37 push away

The power ball bearing; 38 feed screw nuts; 39 leading screws; 40 gag lever posts; 41 leading screw upper mounted plates;

42 packing rings; 43 fixed bars; 44 leading screw bottom plates; 45 conical gear pairs; 46 motors; 47 push away

Bar; 48 sleeves; 49 rotate ratchet; 50 fixed pawls; 51 inserted links; 52 springs.

Below in conjunction with description of drawings operating process of the present invention:

Before test, earlier sample 5 is clipped between upper grip 20 and the lower chuck 21, heating furnace 18 is heated up, when equitemperature reaches predetermined temperature, on scale pan 28, place predetermined gram level weight earlier, press counterweight button 30 again and apply predetermined kilogram levels weight, start motor 46 then, supporting disk 33 slowly moves down, load just is applied on the connecting link 3 by lever 1, stretcher strain takes place in sample 5 thereupon, and displacement transducer 12 has just write down corresponding deflection, when sample 5 is broken, counterweight seat 29 just drops on the supporting disk 33, and reduces to impact by the spring action of impact damper 34.

Before loading, the counterweight seat is supported by supporting disk, and motor rotates by conical gear subband movable wire thick stick, and leading screw drives nut again and moves up and down, supporting disk also moves up and down with feed screw nut, when needing to load, starter motor moves down supporting disk, load just gently is added on the load bar, when sample was broken, counterweight dropped on the supporting disk, and the spring that is contained in the supporting disk bottom just can reduce the impact that counterweight falls.

Claims

1, a kind of lever type fixed load material testing machine, by frame, displacement transducer, sample chuck and heating furnace are formed, it is characterized in that: column is connected with the testing machine fixed cross beam with support, the guide rail fixed cross beam is fixed on the column, guide rail and fulcrum ratio coaster are housed on it, on coaster, be provided with cutting edge, blade on cutting edge and the lever agrees with, the left end of lever also is provided with cutting edge, the low order end of lever is provided with counterweight balance and adjusts piece, middle part at lever is provided with blade by different proportion, blade can be placed on the cutting edge of fulcrum ratio coaster according to required different proportion, below the guide rail fixed cross beam, linear ball bearing is housed, connecting link and linear ball bearing are slidingly matched, the upper end of connecting link is connected with lever by hinge, the lower end of connecting link is connected with the upper end of length adjuster, the lower end of length adjuster is connected with upper grip, lower chuck and lower chuck seat are connected through the hinge, base of the carrier head is fixed on the support, right-hand member at lever is connected with displacement drive link lower end hinge, the upper end of displacement drive link is connected with displacement transducer, and heating furnace is contained in by hinge on the column of testing machine, is provided with several groups of counterweights of Different Weight in charger.

2, a kind of lever type fixed load material testing machine according to claim 1, counterweight is not when loading, inserted link with the counterweight button is fixed on sleeve and the pillar, and counterweight seat and scale pan all are fixed on the load bar, and the blade of load bar upper end and the cutting edge of lever left end agree with.