CN105203450A - Device and method for testing annealing capability of electrotechnical copper pole - Google Patents
Device and method for testing annealing capability of electrotechnical copper pole Download PDFInfo
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- CN105203450A CN105203450A CN201410294169.2A CN201410294169A CN105203450A CN 105203450 A CN105203450 A CN 105203450A CN 201410294169 A CN201410294169 A CN 201410294169A CN 105203450 A CN105203450 A CN 105203450A
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Abstract
The invention provides a device for testing the annealing capability of an electrotechnical copper pole. The device comprises a mounting base; a rotary core rod, a tray capable of moving up and down, and a fixture are arranged on the mounting base; a first balancing weight is placed on the tray; the fixture is arranged right above the first balancing weight; the core rod is used for reeling a copper wire sample to ensure that the copper wire sample is reeled into a coil-shaped test sample; the fixture is used for clamping the upper end of the test sample; the first balancing weight is used for being suspended at the lower end of the test sample. The device can be used for highly accurately measuring the extension quantity of the test sample after being stretched, so as to judge the annealing performance of the electrotechnical copper pole (to which the test sample belongs) according to the extension quantity. Moreover, the device is simple in integral structure, low in manufacturing cost, and excellent in popularization meaning.
Description
Technical field
The present invention relates to copper bar can annealing field tests, and particularly relating to a kind of electrician can annealing proving installation and method of testing with copper bar.
Background technology
Copper wire (also known as copper cash) is made up after wire-drawing process of copper bar, and the electric conductivity of copper wire is very good, therefore by a large amount of for the manufacture of electric wire, cable, brush etc.When producing copper wire, electrician can produce work hardening with copper bar in drawing process, therefore follow-up also needs carries out annealing in process according to technique and performance requirement to it.But, due to electrician's can be not quite similar by Annealing Property with copper bar of different manufacturers and the trade mark, therefore should can formulate or adjust corresponding wire drawing and annealing technique by Annealing Property according to concrete copper bar, otherwise adverse influence can be caused to the processing characteristics of copper wire, product quality, even can frequently there is wire drawing breakage phenomena, have a strong impact on the copper wire performance of following process, therefore be necessary very much before manufacture copper wire, can test by Annealing Property copper bar.
At present, existing copper bar can Annealing Property method of testing be generally judge with the Rockwell's hardness of copper bar the capacity of water that this copper bar can be annealing by measuring electrician.But the sensitivity of this rockwell hardness testing method is lower, especially low for those copper contents, can annealing difference or annealing electrician relatively can use copper bar, its sensitivity be lower.
Summary of the invention
The shortcoming of prior art in view of the above, the electrician that the object of the present invention is to provide a kind of structure simple, highly sensitive can annealing proving installation with copper bar.
For achieving the above object, the invention provides a kind of electrician can annealing proving installation with copper bar, comprise mount pad, described mount pad is provided with a rotating plug, a pallet moving up and down and a fixture, described pallet is placed with the first balancing weight, described fixture is positioned at directly over the first balancing weight; Described plug is used for coiled wires sample and makes copper cash sample be wound as test specimen in coiled type, and described fixture is used for the upper end of clamp assay sample, and described first balancing weight is for being suspended on the lower end of test specimen.
Further, described mount pad is also provided with controller, multiple control knob, the first motor and the second motor, described first motor is fixedly connected with plug by a coupling shaft, described second motor is fixedly connected with pallet lower end by a gear train, and described controller is connected with multiple control knob, the first motor, the second motor respectively.
Preferably, described gear train comprises pitch wheel and tooth bar, and described gear is fixed on the output shaft of the second motor, and tooth bar upper end is fixed on the lower surface of pallet.
Preferably, the axis of described plug is positioned at surface level.
Further, described fixture comprises the symmetrically arranged clamping plate of two panels, forms a grasping part inside two panels clamping plate, and two panels clamping plate are connected by a bolt, and the end thread of this bolt is connected with a clamp nut.
As mentioned above, the electrician that the present invention relates to can annealing proving installation with copper bar, has following beneficial effect:
This proving installation can measure test specimen elongation after the stretch very accurately, thus according to this elongation judge the electrician at this test specimen place with copper bar can Annealing Property, and this proving installation one-piece construction is simple, low cost of manufacture, is with the promotion of good sense.
Another object of the present invention is to provide a kind of highly sensitive electrician can annealing method of testing with copper bar.
For achieving the above object, the invention provides a kind of electrician can annealing method of testing with copper bar, in turn includes the following steps:
A, prepare copper cash sample: get one section of electrician to be tested and use copper bar, electrician's copper bar is stretched to the copper cash that diameter is 2.0 ± 0.01mm, then by copper wire annealing, obtains copper cash sample;
B, prepare test specimen: be wound on by copper cash sample on the plug of a rotation, make copper cash sample disc become a spiral winding; By spiral winding from after plug takes off, spiral winding is a test specimen in coiled type;
The initial axial length L0 of C, measurement test specimen;
D, by the upper end fixed clamp of test specimen in a fixture, lower end hang one first balancing weight, this first balancing weight is placed in a pallet moving up and down;
E, described pallet drive the first balancing weight to move down together, to load load to test specimen, after pallet and the first balancing weight are separated, after the time that the first balancing weight is freely hanging at test specimen lower end reaches T1, the lower end of the first balancing weight from test specimen is taken off, take off test specimen simultaneously, and test specimen is freely placed on a platform;
F, the sample to be tested time be freely placed on platform measure the stretching axial length Lf of the test specimen after being stretched by the first balancing weight, then the elongation L=Lf-L0 of test specimen after reaching T2;
G, to judge according to the elongation of test specimen this electrician with copper bar can Annealing Property, described electrician can be directly proportional with the elongation of the test specimen of copper bar to this electrician by Annealing Property with copper bar.
Further, the axis of described plug is positioned at surface level, and in described step B, when coiled wires sample, the lower end of copper cash sample is hung with the second balancing weight.
Preferably, in described steps A, the step of copper wire annealing is: copper cash to be placed under the constant temperature of 200 ± 0.5 ° heating 2 ± 0.02 hours, then by the rapid water-cooled of copper cash after having heated to room temperature.
Further, before carrying out step B, first on copper cash sample, mark two mark lines, the gauge length between two mark lines is D; In described step C, initial axial length L0 is the initial axial length between the coil of two, two mark line places; In described step F, stretching axial length Lf is the stretching axial length Lf between the coil of two, two mark line places.
Preferably, in described step e, the first balancing weight is less than or equal to 20mm/s to the loading velocity that test specimen loads load.
As mentioned above, the electrician that the present invention relates to can annealing method of testing with copper bar, has following beneficial effect:
The mensuration of this method of testing to the helically elongation of coiled type test specimen has very high sensitivity, therefore test electrician with copper bar can be annealing sensitivity also very high, and this method of testing be specially adapted to copper content low, can annealing difference or can annealing electrician relatively can the test of Annealing Property with copper bar, thus provide strong foundation, the final quality ensureing copper cash for the wire drawing and annealing technique of setting or adjustment electrician copper bar.
Accompanying drawing explanation
Fig. 1 is that in the present invention, electrician's copper bar can the structural representation of annealing proving installation.
Fig. 2 is the connection diagram of the first motor and plug in Fig. 1.
Fig. 3 is the connection diagram of the second motor and pallet in Fig. 1.
Fig. 4 is an embodiment of fixture in Fig. 1.
Fig. 5 is another embodiment of fixture in Fig. 1.
Element numbers explanation
1 mount pad
2 plugs
3 pallets
4 fixtures
41 clamping plate
42 grasping parts
43 bolts
44 clamp nuts
45 clamping faces
46 rubber sheet gaskets
5 first balancing weights
6 control knobs
61 first buttons
62 second buttons
7 first motors
8 second motors
9 coupling shafts
10 gears
11 tooth bars
12 second balancing weights
13 copper cash samples
14 test specimens
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
Notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, the invention provides a kind of electrician can annealing proving installation with copper bar, comprise mount pad 1, described mount pad 1 is provided with rotating plug 2, a pallet 3 moving up and down and a fixture 4, described pallet 3 is placed with the first balancing weight 5, described fixture 4 is positioned at directly over the first balancing weight 5; Described plug 2 is for coiled wires sample 13 and make copper cash sample 13 be wound as test specimen 14 in coiled type, and described fixture 4 is for the upper end of clamp assay sample 14, and described first balancing weight 5 is for being suspended on the lower end of test specimen 14.
Above-mentioned proving installation can complete the winding of copper cash sample 13 and the stretching in coiled type test specimen 14 well, thus accurately can draw the elongation after the stretching of test specimen 14, and according to elongation judge the electrician at this test specimen 14 place with copper bar can Annealing Property.Simultaneously, the mensuration of this proving installation to test specimen 14 elongation has very high sensitivity, therefore it test of Annealing Property can have very high sensitivity to electrician too with copper bar, can distinguish preferably those copper contents low and can annealing poor electrician with copper bar can the difference of annealing ability, thus provide scientific basis for the wire drawing and annealing technological parameter of setting or adjustment electrician copper bar, finally ensure processing characteristics and the product quality of the copper cash produced.
Further, as shown in Figure 1, described mount pad 1 is also provided with controller, multiple control knob 6, first motor 7 and the second motor 8, described first motor 7 is fixedly connected with plug 2 by a coupling shaft 9, described second motor 8 is fixedly connected with pallet 3 lower end by a gear train, and described controller is connected with multiple control knob 6, first motor 7, second motor 8 respectively.Described multiple control knob 6 comprises the first button 61 and the second button 62, and wherein, the first button 61 and the second button 62 are respectively used to opening or closing of control first motor 7 and the second motor 8.After pressing the first button 61, controller receives signal and drives the first motor 7 to rotate, and the first motor 7 drives coupling shaft 9 to rotate together with plug 2, thus coiled wires sample 13; After pressing the second button 62, controller receives signal and drives the second motor 8 to rotate, and the second motor 8 drives pallet 3 to move down together with the first balancing weight 5 by gear train, and described gear train is used for rotational motion to be converted into rectilinear motion.
In addition, in the present embodiment, as shown in Figure 2, described coupling shaft 9 and plug 2 are structure as a whole, and the diameter of described coupling shaft 9 is greater than the diameter of plug 2, and the output shaft of described first motor 7 is fixedly connected with coupling shaft 9 by a shaft coupling.See Fig. 3, described gear train comprises pitch wheel 10 and tooth bar 11, and described gear 10 is fixed on the output shaft of the second motor 8, and tooth bar 11 upper end is fixed on the lower surface of pallet 3; The output shaft driven gear 10 of the second motor 8 rotates together, and gear 10 is meshed with tooth bar 11, therefore tooth bar 11 drives pallet 3 move down together or move up.
Further, as shown in Figure 4 and Figure 5, described fixture 4 comprises the symmetrically arranged clamping plate 41 of two panels, forms a grasping part 42 inside two panels clamping plate 41, and two panels clamping plate 41 are connected by a bolt 43, and the end thread of this bolt 43 is connected with a clamp nut 44.Before putting into test specimen 14, first loosen fastening nut 44, then the grasping part 42 between inside two panels clamping plate 41 becomes large; Grasping part 42 is put in the upper end of test specimen 14, tightens clamp nut 44, then the grasping part 42 between inside two panels clamping plate 41 diminishes, until the upper end of test specimen 14 is tightly fixed in grasping part 42.Preferably, in order to ensure the clamping dynamics of fixture 4 pairs of test specimens 14, as shown in Figure 4, a rubber sheet gasket 46 can all be fixed on the medial surface of two panels clamping plate 41, the rough surface of rubber sheet gasket 46, increases the friction dynamics between rubber sheet gasket 46 and test specimen 14 with this; Or, as shown in Figure 5, the medial surface of two panels clamping plate 41 is all set as jagged clamping face 45, thus the friction dynamics increased between clamping face 45 and test specimen 14, to improve the holding force of fixture 4 pairs of specimen sample, prevent test specimen 14 upper end in the process of tensile testing samples 14 from deviating from from fixture 4, and then ensure carrying out smoothly of test.
The present invention also provides a kind of electrician can annealing method of testing with copper bar, in turn includes the following steps:
A, prepare copper cash sample 13: get one section of electrician to be tested and use copper bar, electrician's copper bar is stretched to the copper cash that diameter is 2.0 ± 0.01mm, again by copper wire annealing, obtain copper cash sample 13, the preparation process of described copper cash sample 13 and this electrician close by copper bar actual production technological process, thus make copper cash sample 13 effectively this electrician of simulation by the performance characteristics corresponding in actual production process of copper bar, thus improve this electrician can the accuracy of annealing test result with copper bar;
B, prepare test specimen 14: be wound on the plug 2 of a rotation by copper cash sample 13, make copper cash sample 13 coil into a spiral winding; By spiral winding from after plug 2 takes off, spiral winding is a test specimen 14 in coiled type;
The initial axial length L0 of C, measurement test specimen 14;
D, by the upper end fixed clamp of test specimen 14 in a fixture 4, lower end hang one first balancing weight 5, this first balancing weight 5 is placed in a pallet 3 moving up and down; Preferably, described first balancing weight 5 is the counterweight of a heavy 2240 ± 2g, and the upper end of this counterweight is fixed with a hook, for being connected with the lower end of test specimen 14;
E, described pallet 3 drive the first balancing weight 5 to move down together, to load load to test specimen 14, after pallet 3 and the first balancing weight 5 are separated, after the time that the first balancing weight 5 is freely hanging at test specimen 14 lower end reaches T1, first balancing weight 5 is taken off from the lower end of test specimen 14, take off test specimen 14 simultaneously, and test specimen 14 is freely placed on a platform;
F, sample to be tested 14 time be freely placed on platform measure the stretching axial length Lf of the test specimen 14 after being stretched by the first balancing weight 5, then the elongation L=Lf-L0 of test specimen 14 after reaching T2;
G, to judge according to the elongation of test specimen 14 this electrician with copper bar can Annealing Property, described electrician can be directly proportional with the elongation of the test specimen 14 of copper bar to this electrician by Annealing Property with copper bar.
The mensuration of above-mentioned method of testing to the helically elongation of coiled type test specimen 14 has very high sensitivity, therefore test electrician with copper bar can be annealing sensitivity also very high, be specially adapted to copper content low, can annealing difference or can annealing electrician relatively can the test of Annealing Property with copper bar.If the elongation of test specimen 14 is large, then this electrician with copper bar can Annealing Property good; If the elongation of test specimen 14 is little, then this electrician with copper bar can Annealing Property poor.When electrician with copper bar can Annealing Property poor time, then to reformulate or adjust its wire drawing and annealing technological parameter on the original basis, to ensure processing characteristics and the product quality of copper cash, in case there is wire drawing breakage phenomena.Therefore the method for testing that the present invention relates to can provide strong foundation, final processing characteristics and the product quality ensureing copper cash for the wire drawing and annealing technique of setting or adjustment electrician copper bar.
Further, as shown in Figure 1, the axis of described plug 2 is positioned at surface level, and in described step B, when coiled wires sample 13, the lower end of copper cash sample 13 is hung with the second balancing weight 12.Second balancing weight 12 is freely hanging at the lower end of copper cash sample 13, therefore has a pulling force to copper cash sample 13, thus stretching copper cash sample 13, prevent the bending of copper cash sample 13, thus ensure the quality of the spiral winding of institute's coiling.In the present embodiment, described second balancing weight 12 is the counterweight of a heavy 2240 ± 2g, and the upper end of this counterweight is fixed with a hook, for being connected with the lower end of copper cash sample 13.
Preferably, in described steps A, the step of copper wire annealing is: copper cash to be placed under the constant temperature of 200 ± 0.5 ° heating 2 ± 0.02 hours, then by the rapid water-cooled of copper cash after having heated to room temperature, the annealing process of copper cash and electrician is consistent with the annealing process of copper bar.
Further, before carrying out step B, first on copper cash sample 13, mark two mark lines, these two mark lines are a circle, and with the periphery around copper cash sample 13 1 cross sections, the gauge length between two mark lines is D; In described step C, initial axial length L0 is the initial axial length between the coil of two, two mark line places; In described step F, stretching axial length Lf is the stretching axial length Lf between the coil of two, two mark line places.
Preferably, in described step e, the loading velocity that first balancing weight 5 pairs test specimen 14 loads load is less than or equal to 20mm/s, namely pallet 3 is in folding process, test specimen 14 elongation per second is less than 25mm, with ensure to test specimen 14 loaded load reposefully, thus ensure can Annealing Property test accuracy.
Below exemplify one preferably embodiment illustrate that the electrician that the present invention relates to can annealing method of testing with copper bar, this embodiment in turn includes the following steps:
1, the electrician to be tested getting one section of certain length uses copper bar, through a series of passage, this electrician's copper bar to be tested is stretched to the copper cash that diameter is 2.0 ± 0.01mm, and the copper rod area decrement of every a time is 20-25%, draw speed is less than or equal to 65m/min, to avoid copper cash excessive heating in bracing wire process;
2, the copper cash in step 1 after bracing wire intercepts the sample of one section of appropriate length, sample disc become diameter to be the coil of 200 ± 50mm size, take up room to reduce it; Heated 2 ± 0.02 hours under the constant temperature of 200 ± 0.5 ° by coil, rapid water-cooled is to room temperature afterwards again;
3, the coil after annealing in step 2 intercepts the long copper cash sample 13 of one section of about 1400mm, use the marking tool wiping not fall on copper cash sample 13, mark two mark lines, the gauge length between two mark lines is 1000mm simultaneously;
4, copper cash sample 13 upper end is fixed on diameter and is 20 ± 0.1mm and the plug 2 of horizontal positioned is inboard, lower end hangs the stress that the second balancing weight 12, second balancing weight 12 weighing 2240 ± 2g produces a 7MPA on copper cash sample 13; Press the first button 61 on mount pad 1, then the first motor 7 drives plug 2 at the uniform velocity to rotate with the speed of 50 ± 5 revs/min, thus copper cash sample 13 is coiled into a spiral winding, and the coil in this spiral winding is greater than 18 circles; Preferably, the outside surface of described plug 2 through polishing, to improve the smoothness of plug 2 outside surface; In the process of coiling copper cash sample 13, the hand-held copper cash sample 13 of operator and matching with the rotation of plug 2, ensures in the spiral winding that coiling is good, each circle is all wanted and a upper circle contacts and adjacent two enclose between can not extrude;
5, by spiral winding from after plug 2 takes off, spiral winding is a test specimen 14 in coiled type;
6, the measuring accuracy measuring initial axial length L0, the L0 of test specimen 14 between two mark lines is accurate to 1.0mm, in the present embodiment, and L0=28mm;
7, by the upper end fixed clamp of test specimen 14 in described fixture 4, first balancing weight 5 of 2240 ± 2g during lower end hangs, this first balancing weight 5 is placed in described pallet 3;
8, press the second button 62 on mount pad 1, then the second motor 8 drives pallet 3 to move down by gear train; In pallet 3 folding process, the first balancing weight 5 on pallet 3 upper surface moves down together, thus tensile testing samples 14, namely load load reposefully to test specimen 14, the loading velocity of load can not more than 20mm/s; Test specimen 14 is constantly stretched, and it has a pulling force upwards to the first balancing weight 5, and when the gravity of this pulling force and the first balancing weight 5 balances each other, the first balancing weight 5 is separated with pallet 3, and pallet 3 continues to move down, and the first balancing weight 5 stops moving down; After pallet 3 and the first balancing weight 5 are separated, after the time that the first balancing weight 5 is freely hanging at test specimen 14 lower end reaches 1 minute, carefully take off the first balancing weight 5, the test specimen 14 be stretched is taken off simultaneously and its free loosely is placed on platform;
9, after spending at least 1 minute, measure the stretching axial length Lf of test specimen 14 between two mark lines, the measuring accuracy of Lf is accurate to 1.0mm, then the elongation L=Lf-L0 of test specimen 14;
10, on same coil, repeat step 3 to step 9 twice, adopt the end value of mean value as test specimen 14 spiral elongation testing L for three times;
The end value of the spiral elongation 11, drawn according to step 10 judge this electrician with copper bar can Annealing Property.
Above-mentioned steps, described first balancing weight 5 and the second balancing weight 12 can be same counterweight, to save the resource of test.
In sum, the electrician that the present invention relates to copper bar can annealing proving installation and method of testing make the preparation of copper cash sample 13 and actual electrician close by the production process of copper bar, therefore effectively can simulate the actual production process of electrician with copper bar and the performance characteristics of correspondence; In addition, the elongation of spiral winding test specimen 14 has higher sensitivity, therefore effectively improve electrician can the accuracy of Annealing Property test and precision with copper bar, especially low to copper content, can annealing difference or annealing electrician relatively can have with copper bar and better test effect.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. an electrician can annealing proving installation with copper bar, it is characterized in that: comprise mount pad (1), described mount pad (1) is provided with a rotating plug (2), a pallet moving up and down (3) and a fixture (4), described pallet (3) is placed with the first balancing weight (5), described fixture (4) is positioned at directly over the first balancing weight (5); Described plug (2) is for coiled wires sample (13) and make copper cash sample (13) be wound as test specimen (14) in coiled type, described fixture (4) is for the upper end of clamp assay sample (14), and described first balancing weight (5) is for being suspended on the lower end of test specimen (14).
2. electrician according to claim 1 can annealing proving installation with copper bar, it is characterized in that: described mount pad (1) is also provided with controller, multiple control knob (6), the first motor (7) and the second motor (8), described first motor (7) is fixedly connected with plug (2) by a coupling shaft (9), described second motor (8) is fixedly connected with pallet (3) lower end by a gear train, and described controller is connected with multiple control knob (6), the first motor (7), the second motor (8) respectively.
3. electrician according to claim 2 can annealing proving installation with copper bar, it is characterized in that: described gear train comprises pitch wheel (10) and tooth bar (11), described gear (10) is fixed on the output shaft of the second motor (8), and tooth bar (11) upper end is fixed on the lower surface of pallet (3).
4. electrician according to claim 1 can annealing proving installation with copper bar, it is characterized in that: the axis of described plug (2) is positioned at surface level.
5. electrician according to claim 1 can annealing proving installation with copper bar, it is characterized in that: described fixture (4) comprises the symmetrically arranged clamping plate of two panels (41), two panels clamping plate (41) inner side forms a grasping part (42), two panels clamping plate (41) are connected by a bolt (43), and the end thread of this bolt (43) is connected with a clamp nut (44).
6. electrician can an annealing method of testing with copper bar, it is characterized in that: in turn include the following steps:
A, prepare copper cash sample (13): get one section of electrician to be tested and use copper bar, electrician's copper bar is stretched to the copper cash that diameter is 2.0 ± 0.01mm, then by copper wire annealing, obtains copper cash sample (13);
B, prepare test specimen (14): be wound on the plug (2) of a rotation by copper cash sample (13), make copper cash sample (13) coil into a spiral winding; By spiral winding from after plug (2) takes off, spiral winding is a test specimen (14) in coiled type;
The initial axial length L0 of C, measurement test specimen (14);
D, by the upper end fixed clamp of test specimen (14) in a fixture (4), lower end hangs one first balancing weight (5), and this first balancing weight (5) is placed in a pallet moving up and down (3);
E, described pallet (3) drive the first balancing weight (5) to move down together, to load load to test specimen (14), after pallet (3) and the first balancing weight (5) are separated, after the time that the first balancing weight (5) is freely hanging at test specimen (14) lower end reaches T1, the lower end of first balancing weight (5) from test specimen (14) is taken off, take off test specimen (14) simultaneously, and test specimen (14) is freely placed on a platform;
After F, sample to be tested (14) time be freely placed on platform reaches T2, measure the stretching axial length Lf of the test specimen (14) after being stretched by the first balancing weight (5), then the elongation L=Lf-L0 of test specimen (14);
G, to judge according to the elongation of test specimen (14) this electrician with copper bar can Annealing Property, described electrician can be directly proportional with the elongation of the test specimen (14) of copper bar to this electrician by Annealing Property with copper bar.
7. electrician according to claim 6 can annealing method of testing with copper bar, it is characterized in that: the axis of described plug (2) is positioned at surface level, in described step B, when coiled wires sample (13), the lower end of copper cash sample (13) is hung with the second balancing weight (12).
8. electrician according to claim 6 can annealing method of testing with copper bar, it is characterized in that: in described steps A, the step of copper wire annealing is: copper cash to be placed under the constant temperature of 200 ± 0.5 ° heating 2 ± 0.02 hours, then by the rapid water-cooled of copper cash after having heated to room temperature.
9. electrician according to claim 6 can annealing method of testing with copper bar, it is characterized in that: before carrying out step B, and first on copper cash sample (13), mark two mark lines, the gauge length between two mark lines is D; In described step C, initial axial length L0 is the initial axial length between the coil of two, two mark line places; In described step F, stretching axial length Lf is the stretching axial length Lf between the coil of two, two mark line places.
10. electrician according to claim 6 can annealing method of testing with copper bar, it is characterized in that: in described step e, and the first balancing weight (5) is less than or equal to 20mm/s to the loading velocity that test specimen (14) loads load.
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| CN107179313A (en) * | 2017-05-16 | 2017-09-19 | 上海电缆研究所有限公司 | Electrician is with the appraisal procedure of reclaimed copper bar performance |
| CN107179313B (en) * | 2017-05-16 | 2020-03-24 | 上海电缆研究所有限公司 | Method for evaluating performance of recycled copper rod for electrician |
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