Measure the method that friction stir spot soldered joint maximum is drawn shearing
Technical field
The present invention relates to a kind of method that friction stir spot soldered joint draws shearing of measuring, be specifically related to a kind of method that friction stir spot soldered joint maximum is drawn shearing of measuring.
Background technology
Friction stir spot welding is a kind of novel spot-welding technology, compares in welding have plurality of advantages during low-melting-point metal with traditional resistor spot welding, high such as welding quality, production cost is low, non-environmental-pollution etc.Evaluating the most important performance index of friction stir spot soldered joint is that maximum is drawn shearing, but the asymmetry due to tack-weld, traditional draw that to cut measuring method be to measure test specimen and apply larger additional bending moment drawing to cut, make its bend-shear-mixed fracture, thereby have the greatest impact, draw the measurement result of shearing.Therefore, traditional drawing cut the maximum that measuring method is difficult to accurately measure friction stir spot soldered joint and drawn shearing.
Summary of the invention
The object of the invention is to draw and cut additional bending moment in measuring method and draw shearing force measurement result to exert an influence to friction stir spot soldered joint maximum for solving tradition, cause measuring inaccurate problem, propose a kind of method that friction stir spot soldered joint maximum is drawn shearing of measuring.
Measuring friction stir spot soldered joint maximum draws the method for shearing to realize by following steps:
Step 1, making jig: processing upper support side plate and lower support side plate, make the equal in length of upper support side plate and lower support side plate, and the length of upper support side plate is to draw to cut to measure 10 times~20 times of test specimen overlap thickness, upper support side plate and lower support side plate be arranged in parallel up and down, its gap equals to draw cuts the thickness of measuring test specimen overlap, and upper support side plate is connected by bolt and nut with lower support side plate;
Step 2, assembling are drawn and are cut measurement test specimen: will draw and cut measurement test specimen and be placed between upper support side plate and lower support side plate, and by bolt and nut, regulate the gap of upper support side plate and lower support side plate, make it just equal to draw and cut the thickness of measuring test specimen overlap, draw cut measure test specimen both sides not overlap place respectively the cushion block that thickness equates with welded sheet metal thickness;
Step 3, draw and cut measurement: drawing after assembling cut and measured test specimen, jig and cushion block and be installed on and draw on shear test machine, with the loading velocity of 0.5mm/min~1.5mm/min, to drawing to cut, measure test specimen and draw scissor test, when drawing to cut to measure after test specimen ruptures completely, stop test, and record maximum and draw scissor test load.
The present invention compared with prior art has following beneficial effect:
One, cut in measuring process drawing, upper support side plate and lower support side plate can be measured test specimen and retrain drawing to cut, guarantee workpiece pure draw under the condition of cutting, occur disrumpent feelings.In addition, the length of upper support side plate and lower support side plate is far longer than to draw cuts the thickness of measuring test specimen overlap, can make like this to draw the impact of cutting the suffered additional bending moment of measurement test specimen to be ignored.Therefore, measurement result can reflect that the maximum of joint draws shearing truly.
Two, in addition, by bolt and nut, regulate the gap of upper support side plate and lower support side plate, can realize different overlap joint thickness and draw to cut and measure drawing of test specimen and cut measurement.
Accompanying drawing explanation
Fig. 1 draws in the step 2 of embodiment one to cut the main cut-open view of measuring after test specimen is assembled with jig;
Fig. 2 draws in the step 2 of embodiment one to cut the stereographic map of measuring after test specimen is assembled with jig.
Embodiment
Embodiment one: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment realizes by following steps:
Step 1, making jig: processing upper support side plate 1 and lower support side plate 2, make the equal in length of upper support side plate 1 and lower support side plate 2, and the length L of upper support side plate 1 is to draw to cut to measure 10 times~20 times of test specimen 3 overlap thickness t, upper support side plate 1 be arranged in parallel up and down with lower support side plate 2, its gap equals to draw cuts the thickness of measuring test specimen 3 overlaps, and upper support side plate 1 is connected by bolt and nut 5 with lower support side plate 2;
Step 2, assembling are drawn to cut and are measured test specimen 3: will draw and cut measurement test specimen 3 and be placed between upper support side plate 1 and lower support side plate 2, and by the gap of bolt and nut 5 adjusting upper support side plates 1 and lower support side plate 2, make it just equal to draw and cut the thickness t of measuring test specimen 3 overlaps, draw cut measure test specimen 3 both sides not overlap place respectively the cushion block 4 that thickness equates with welded sheet metal thickness;
Step 3, draw and cut measurement: drawing after assembling cut and measured test specimen 3, jig and cushion block 4 and be installed on and draw on shear test machine, with the loading velocity of 0.5mm/min~1.5mm/min, to drawing to cut, measure test specimen 3 and draw scissor test, when drawing to cut to measure after 6 of examinations are ruptured completely, stop test, and record maximum and draw scissor test load F.
Embodiment two: in conjunction with Fig. 1, present embodiment is described, present embodiment is that the length L of upper support side plate 1 in step 1 is to draw to cut to measure 12 times of test specimen 3 overlap thickness t.Can make like this to draw the impact of cutting measurement test specimen 3 suffered additional bending moments to be ignored.Other step is identical with embodiment one.
Embodiment three: in conjunction with Fig. 1, present embodiment is described, present embodiment is that the length L of upper support side plate 1 in step 1 is to draw to cut to measure 14 times of test specimen 3 overlap thickness t.Can make like this to draw the impact of cutting measurement test specimen 3 suffered additional bending moments to be ignored.Other step is identical with embodiment one.
Embodiment four: in conjunction with Fig. 1, present embodiment is described, present embodiment is that the length L of upper support side plate 1 in step 1 is to draw to cut to measure 16 times of test specimen 3 overlap thickness t.Can make like this to draw the impact of cutting measurement test specimen 3 suffered additional bending moments to be ignored.Other step is identical with embodiment one.
Embodiment five: in conjunction with Fig. 1, present embodiment is described, present embodiment is that the length L of upper support side plate 1 in step 1 is to draw to cut to measure 18 times of test specimen 3 overlap thickness t.Can make like this to draw the impact of cutting measurement test specimen 3 suffered additional bending moments to be ignored.Other step is identical with embodiment one.
Embodiment six: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment is that in described step 3, loading velocity is 0.6mm/min.Other step is identical with embodiment one.
Embodiment seven: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment is that in described step 3, loading velocity is 0.8mm/min.Other step is identical with embodiment one.
Embodiment eight: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment is that in described step 3, loading velocity is 1mm/min.Other step is identical with embodiment one.
Embodiment nine: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment is that in described step 3, loading velocity is 1.2mm/min.Other step is identical with embodiment one.
Embodiment ten: in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment is that in described step 3, loading velocity is 1.4mm/min.Other step is identical with embodiment one.