CN103149105B - Device and method for testing stress relaxation resistance of elastic belt material - Google Patents
Device and method for testing stress relaxation resistance of elastic belt material Download PDFInfo
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- CN103149105B CN103149105B CN201310071121.0A CN201310071121A CN103149105B CN 103149105 B CN103149105 B CN 103149105B CN 201310071121 A CN201310071121 A CN 201310071121A CN 103149105 B CN103149105 B CN 103149105B
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Abstract
The invention provides a device for testing stress relaxation resistance of an elastic belt material. The device comprises a base, a variable frequency motor and a measuring frame, wherein the base is provided with a sliding seat; the left end of the base is provided with a baffle and the right end of the base is provided with a baffling block; the sliding seat is provided with a sliding block; the left end of the sliding base is provided with a guide rod and a limiting rod, which are connected with the baffle; the baffling block is provided with a belt material clamping block and the right end of the sliding block is provided with a wedge-shaped clamping block and a dial indicator measuring head; and a driven wheel which is arranged at the left end of the sliding block and is contacted with a cam on the variable frequency motor drives the sliding block to slide on the sliding seat back and forth. A testing method comprises the following steps that: one end of the belt material is placed on the top plane of the baffling block and one part which is 1/2 of the length of other end of the belt material is placed above the sliding block; a dial indicator head is contacted with the central point of the leftmost end of a copper belt and a reading is adjusted to a zero position; the other end of the belt material is raised by 3-4mm along the inclined plane of the wedge-shaped block; a locking limiting unit is used for limiting a slide stroke and the variable frequency motor drives the sliding block to pull the wedge-shaped block to be inserted back and forth; and after operation is finished, the wedge-shaped block is pulled out and a reading of a dial indicator is read. The device and the method disclosed by the invention can be used for indirectly measuring the capability of the stress relaxation resistance of the elastic belt material.
Description
Technical field
The present invention relates to the apparatus and method of the anti-stress relaxation of a kind of testing elastic band.
Background technology
In elasticity band, copper material, because electric conductivity is good, is usually used in making the connectors such as all kinds of receptacles, plug.The function of connector is to pass through socket, the close contact of plug, by the lead electrical equipment of electricity consumption of electricity, if socket, between plug, contact is not tight, can increase contact resistance, under the effect of large electric current, can produce in contact position a large amount of heat, material is subject to thermal softening, more worsen combination hub, contact between plug, at socket, between plug, can form loose contact, heating power, material is subject to the vicious cycle of thermal softening, therefore for receptacle, plug has a very important performance test, to the socket of manufacturing, plug is by after the plug of 5000 times, its one pole minimum withdrawal force that do not come off is greater than 1.5N(national standard).This test is by simulating the plug of daily receptacle, plug, measure the contact compactedness between contact element, namely elasticity band is subject to after alternating bending, the degree of resilience stress decrease, the anti-stress relaxation performance that resilience stress decrease is few is good, on the contrary anti-stress relaxation poor performance.
When the copper resilient material of evaluating for connector, anti-stress relaxation performance is the important indicator of a reaction material performance, stress relaxation be object when being subject to certain effect power, the phenomenon that distortion restoring force (resilience stress) reduces in time gradually.For metal material, the stress-strain of perfect elasticity deformation stage is to obey Hooke's law completely, but after metal material cold-working, there will be unstable, the development of cold-working causes basal body structure to occur dislocation, and high energy basal body structure plays the effect of a driving force, and during stress relaxation, it will rearrange to tend towards stability, occur energy " in-fighting " phenomenon, occur elastic imperfection, main forms is stress relaxation.But by indexs such as traditional intensity, extensibility, hardness, be substantially still main at present, can only be according to micro-judgment resilient material in the situation that patches process elasticity stress.CN201035107Y proposes a kind of the spring leaf elasticity of electronic connector tests pens, the drag size that can produce contact pin receptacle metal spring leaf performance quality is determined, but it can only be tested for moulding connector, for the anti-stress relaxation performance that detects sheet band, still cannot directly carry out, therefore, develop device and the detection method thereof of the anti-stress relaxation of a kind of testing elastic band, the flexible research of sheet metal strip, production development are brought great convenience.
Summary of the invention
The present invention be directed to the above-mentioned state of the art and the apparatus and method of the anti-stress relaxation of a kind of testing elastic band are provided, can on the production line of production sprung copper band, inspect at random this performance of product by random samples.
A device for the anti-stress relaxation of testing elastic band, comprises a base, is located at variable-frequency motor and measurement bay on base, it is characterized in that fixing a slide on base, and the left end of slide is established a baffle plate, and the right-hand member of slide is established a block; One can horizontal slip on slide slide block, in the left end of slide block, establish the guide pole and the gag lever post that are connected with described baffle plate, the right-hand member of slide block is parallel with the front end of described block; The upper plane of described block is established band clamp, and on the right-hand member of slide block, plane is established the wedge clamping block corresponding with described band clamp, and a dial indicator measuring head is established in the top, inclined-plane of described wedge clamping block; One engaged wheel band movable slider round slip the on slide that is located at slide block left end top and contacts with variable-frequency electric arbor overhead cam.
The method of testing of the anti-stress relaxation of elasticity band, its feature comprises the following steps:
A, will survey copper strip one end and be placed in block top plane, and be clamped by band clamp, the other end 1/2 length is stretched out, and with percentage gauge outfit contact copper strips high order end central point, the reading of dial gauge is adjusted to zero-bit;
The position of b, adjusting guide pole upper limit nut, the copper strip other end is lifted along the inclined-plane of wedge clamping block, when copper strips end height is lifted to 3～4mm, locking stop nut, limit the slippage stroke of slide block, regulate rotating speed and the duration of runs of variable-frequency motor, the slide block being driven by variable-frequency motor is pulled back and is moved the most advanced and sophisticated insertion copper strips other end bottom surface that comes and goes of wedge clamping block on slide, repeats to raise or put down copper strip;
C, working time arrive, and variable-frequency motor and slide block quit work, and extract wedge clamping block out, and the registration of reading dial gauge, is deformation of strip amount.
The rotating speed of described variable-frequency motor is 300～600 cycle per minute clocks, and be 30～60 minutes working time.
In described slide block left end, establish two guide poles parallel with slide, guide pole one end and baffle plate Joint, the other end of guide pole is located in the large stepped hole under slide block left end, is socketed in guide pole middle volute spring and described large stepped hole size suitable.
The slide block left end that described gag lever post is located at above guide pole is interior and parallel with described guide pole, establishes stop nut in the middle of gag lever post, and right-hand member fixes through baffle plate and slide block left end.
Described engaged wheel is fastened in the top plane of slide block by engaged wheel support and follower shaft.
The gradient on the described wedge clamping block right side is 1:5.
The both sides slipping plane of described slide and slide block is the inclined-plane that is less than 90 degree, establishes the quadrilateral chock of adjustable inclined-plane linearity between a Slideslip inclined-plane.
The elastic deformation amount that the present invention produces by measuring band, judge the height of the anti-stress relaxation ability of elasticity band, generally that the anti-stress relaxation ability of band that deflection is large is low, the little anti-stress relaxation ability of deflection is high, the present invention is based on above result, the ability of a kind of testing elastic band elastic deformation amount's the anti-stress relaxation of device indirect determination elasticity band is provided.
Accompanying drawing explanation
Fig. 1 is the vertical view of structure of the present invention.
Fig. 2 is A-A cut-open view of Fig. 1.
Fig. 3 is B-B cut-open view of Fig. 2.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Figure 1 shows that the device of the anti-stress relaxation of test band, comprise base 1, be located at variable-frequency motor 10 and the measurement bay 16 of base 1 one sides, on base 1, fix a slide 2, the left end of slide 2 is established a baffle plate 5, the right-hand member of slide 2 is established a link stopper 6, one can horizontal slip on slide 2 slide block 3, in the left end of slide block 3, establish the guide pole 4 and the gag lever post 7 that are connected with baffle plate 5, the right-hand member of slide block 3 is parallel with block 6 front end faces, the upper plane of block 6 is established the band clamp 14 that clamps band 11, on the right-hand member of slide block 3, plane is established the wedge clamping block corresponding with band clamp 14 12, a dial gauge 13 is established in described wedge clamping block 12 tops, the measuring head 15 of dial gauge 13 is aimed at the central point of band 11 ends on wedge clamping block 12 inclined-planes, one is located at slide block 3 left end tops, and the engaged wheel 8 band movable sliders 3 that contact with variable-frequency motor 10 axle overhead cams 9 come and go and slide on slide 2.
Shown in Fig. 2, in slide block 3 left ends, establish two guide poles parallel with slide 24, guide pole 4 one end and baffle plate 5 Joints, the other end is located in the large stepped hole 21 under slide block 3 left ends, be socketed in the middle volute spring 23 of guide pole 4 suitable with large stepped hole 21 sizes, guide pole 4 ends and small stair hole 22 are slidably connected, and when slide block 3 slides to baffle plate 5, volute spring 23 is compressed, and during reset, slide block 3 is pushed to block 6 by elastic force.In slide block 3 left ends above two guide poles 4, establish the gag lever post 7 paralleling with described guide pole 4, in the middle of gag lever post 7, establish stop nut 26, through the rear right-hand member of baffle plate 5 and slide block 3, fix.Regulate stop nut 26 can limit the sliding stroke of slide block 3 on slide 2.The top plane of slide block 3 and the top plane of block 6 are on the surface level of sustained height, on wedge clamping block 12, one end of plane is screwed by the top plane of screw and slide block 3, the other end is the inclined-plane that rests block 6 top planes, the gradient on wedge clamping block 12 right sides is 1:5, tested copper strips 11 one end rest on the inclined-plane of wedge clamping block 12, and the other end is fixed in the top plane of block 6 by another screw of band clamp 14 use.
Shown in Fig. 3, the slipping plane of described slide 2 and slide block 3 is the inclined-plane that the surface level that slides up and down and both sides slipping plane are less than 90 degree, between a Slideslip inclined-plane, establish the quadrilateral chock 17 of adjustable inclined-plane linearity, the degree of tightness depth of parallelism of adjusting between slide block 3 and slide 2 by set screw 18.Engaged wheel 8 in slide block 3 top planes is connected and fixed by engaged wheel support 20 and follower shaft 19, engaged wheel support 20 is fixed in slide block 3 top planes, cam 9 on variable-frequency motor 10 axles rotates and promotes the slip left on slide 2 of engaged wheel 8 band movable sliders 3, the volute spring 23 simultaneously compressing outside guide pole 4 shrinks, when engaged wheel 8 departs from cam 9, volute spring 23 restores promotion slide block 3 and slides to the right.
method of testing:
Copper strip 11 one end are placed in to block 6 top planes and are clamped by clamp 14, and to make copper strips extension length be length 1/2, with percentage gauge outfit 15 contact copper strips high order end central points, the reading of dial gauge adjusted to zero-bit, manual adjustments gag lever post 7 upper limit nuts 26, make the tip of wedge clamping block 12 extend into copper strip 11 belows, and slide block 3 is moved right and sliding copper strips is lifted, copper strips high order end is raised to 3～4mm when high, the position of locking stop nut 26 limits slide block 3 strokes, regulate rotating speed and the duration of runs of variable-frequency motor, then open variable-frequency motor 10 switches, motor 10 band moving cams 9 rotate, when the large end of cam 9 contacts with engaged wheel 8 gradually, band movable slider 3 slides left along slide 2, now volute spring 23 is compressed, wedge clamping block 12 is moved to the left, copper strip 11 resiliences.When cam 9 does not contact with engaged wheel 8, volute spring 23 resets, and promotes slide block 3 and slides to the right along slide 2, wedge clamping block 12 moves right, and inserts the below of copper strips 11, and copper strips 11 is by lifting again, when stop nut 26 collides with baffle plate 5, slide block 3 stops moving right.Then repeat above-mentioned work and come and go circulation.Above-mentioned variable-frequency motor can be 300～600 beats/min of selections, and the test duration is 30～60 minutes.Variable-frequency motor 10 and slide block 3 quit work, and after the working cycle number of times of setting finishes, extract wedge clamping block out, read the now registration of dial gauge, are band elastic deformation amount.
Embodiment
Brass band is cut into the specification of 40mm * 12.5mm, copper strip 11 is pressed on to rectangle clamp 14 times, its extension length is 20mm.Manual adjustments gag lever post upper limit nut 26, make the tip of wedge clamping block 12 extend into copper strips below, slide block 3 is moved right copper strip is lifted, copper strip high order end is raised to 3mm when high, the position of locking stop nut 26, the height dimension of measuring copper strips high order end with dial indicator measuring head 15, is made as reference point by value now.Then open motor switch, variable-frequency motor 10 band moving cams 9 rotate, and when the large end of cam 9 contacts with engaged wheel 8 gradually, band movable slider 3 slides left along slide 2, and now volute spring 23 is compressed, and wedge clamping block 12 is moved to the left, copper strips 11 resiliences.When cam 9 does not contact with engaged wheel 8, volute spring 23 resets, and promotes slide block 1 and slides to the right along slide 2, and wedge clamping block 12 moves right, and inserts the below of copper strip 11, and copper strip 11 is lifted; When stop nut 26 collides with baffle plate 5, slide block 3 stops moving right, and then repeats above-mentioned working cycle.Working cycle is 300 beats/min, and the test duration is 30 minutes.After the working cycle number of times of setting finishes, extract wedge clamping block 12 out, from dial gauge 13, measure the height value that copper strips lifts, can calculate elastic deformation value.
Table 1 stress relaxation-resistant experimental result
Table 1 is depicted as embodiment 1～3 test result, after the elasticity brass product that average deformation amount is less than 0.25mm is made connector, plugs the test of 5000 times, and the one pole minimum withdrawal force that do not come off is all greater than 1.5N(national standard), meet the demands.And average deformation amount is greater than after the elasticity brass product of 0.25mm is made connector and plugs the test of 5000 times, the one pole minimum withdrawal force that do not come off is all undesirable.
Claims (9)
1. a device for the anti-stress relaxation of testing elastic band, comprises a base, is located at variable-frequency motor and measurement bay on base, it is characterized in that fixing a slide on base, and the left end of slide is established a baffle plate, and the right-hand member of slide is established a block; One can horizontal slip on slide slide block, in the left end of slide block, establish the guide pole and the gag lever post that are connected with described baffle plate, the right-hand member of slide block is parallel with the front end of described block; The upper plane of described block is established band clamp, and on the right-hand member of slide block, plane is established the wedge clamping block corresponding with described band clamp, and a dial indicator measuring head is established in the top, inclined-plane of described wedge clamping block; One engaged wheel band movable slider round slip the on slide that is located at slide block left end top and contacts with variable-frequency electric arbor overhead cam.
2. the device of the anti-stress relaxation of testing elastic band according to claim 1, it is characterized in that establishing two guide poles parallel with slide (4) in described slide block (3) left end, guide pole (4) one end and baffle plate (5) Joint, the other end of guide pole is located in the large stepped hole (21) under slide block (3) left end, is socketed in the middle volute spring (23) of guide pole (4) suitable with described large stepped hole (21) size.
3. the device of the anti-stress relaxation of testing elastic band according to claim 1, it is characterized in that described gag lever post (7) is located in slide block (3) left end of guide pole (4) top and parallel with described guide pole (4), in the middle of gag lever post (7), establish stop nut (26), right-hand member fixes through baffle plate (5) and slide block (3) left end.
4. the device of the anti-stress relaxation of testing elastic band according to claim 1, is characterized in that described engaged wheel (8) is fastened in the top plane of slide block (3) by engaged wheel support (20) and follower shaft (19).
5. the device of the anti-stress relaxation of testing elastic band according to claim 1, is characterized in that the gradient on described wedge clamping block (12) right side is 1:5.
6. the device of the anti-stress relaxation of testing elastic band according to claim 1, is characterized in that described slide (2) and the both sides slipping plane of slide block (3) are the inclined-plane that is less than 90 degree.
7. the device of the anti-stress relaxation of testing elastic band according to claim 6, is characterized in that establishing between a Slideslip face of described both sides slipping plane the quadrilateral chock (17) of adjustable inclined-plane linearity.
8. the method for testing of the anti-stress relaxation of elasticity band, its feature comprises the following steps:
A, will survey copper strip one end and be placed in block top plane, and be clamped by band clamp, 1/2 length of the other end is stretched out, and with percentage gauge outfit contact copper strips high order end central point, the reading of dial gauge is adjusted to zero-bit,
The position of b, adjusting guide pole upper limit nut, the copper strip other end is lifted along the inclined-plane of wedge clamping block, when copper strips end height is raised to 3～4mm, locking stop nut, limit the slippage stroke of slide block, regulate rotating speed and the duration of runs of variable-frequency motor, the slide block being driven by variable-frequency motor is pulled back and is moved the most advanced and sophisticated insertion copper strips other end bottom surface that comes and goes of wedge clamping block on slide, repeats to raise or put down copper strip;
C, working time arrive, and variable-frequency motor and slide block quit work, and extract wedge clamping block out, and the registration of reading dial gauge, is deformation of strip amount.
9. the method for testing of the anti-stress relaxation of elasticity band according to claim 8, the rotating speed that it is characterized in that described variable-frequency motor is 300～600 cycle per minute clocks, be 30～60 minutes working time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310071121.0A CN103149105B (en) | 2013-03-06 | 2013-03-06 | Device and method for testing stress relaxation resistance of elastic belt material |
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| CN201310071121.0A CN103149105B (en) | 2013-03-06 | 2013-03-06 | Device and method for testing stress relaxation resistance of elastic belt material |
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| CN103149105B true CN103149105B (en) | 2014-12-10 |
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| CN106679788A (en) * | 2017-02-27 | 2017-05-17 | 中国计量大学 | Weighing apparatus for the assembly line type detection of weights |
| CN108253872A (en) * | 2018-04-09 | 2018-07-06 | 潍柴西港新能源动力有限公司 | Engine valve clearance measuring device and its measuring method |
| CN111504825A (en) * | 2020-05-26 | 2020-08-07 | 宁波江丰复合材料科技有限公司 | Strength durability detection method for carbon fiber tube |
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