CN218674499U - Sample loading fixture for automobile sheet resistance spot welding cross tensile test - Google Patents

Abstract

The utility model provides a car sheet resistance spot welding cross tensile test's clamping apparatus that takes a sample, belongs to car sheet resistance spot welding equipment technical field and is used for taking a sample to cross tensile sample. The technical scheme is as follows: two guide rail parallel fixation are on the bottom plate, the outer baffle in left side, the baffle in the right side, the outer baffle in right side is placed perpendicularly at the left end and the right-hand member of bottom plate, the lower terminal surface of baffle has the recess of two parallels respectively and guide rail be sliding fit, four face upper portion intermediate positions have the fixed square hole of the same tensile anchor clamps respectively, the left and right sides in the fixed square hole of tensile anchor clamps of baffle in the left side has left baffle bolt fastening square hole respectively, there is right baffle bolt fastening square hole respectively at the upper and lower both ends in the fixed square hole of tensile anchor clamps of baffle in the right side, the baffle has the nut respectively to hold the round hole in the fixed square hole both sides of tensile anchor clamps in the right side. The utility model discloses simple structure, convenient to use can make the clamping end of tensile anchor clamps and cross sample assembly back both sides anchor clamps in same axis, reduce experimental error.

Description

Sample loading fixture for automobile sheet resistance spot welding cross tensile test

Technical Field

The utility model relates to a car sheet resistance spot welding cross tensile sample's fixture of getting on appearance belongs to car sheet resistance spot welding equipment technical field.

Background

In the automobile manufacturing process, resistance spot welding is a mainstream connection mode, and the number of welding spots in a white automobile body can reach thousands, so that the quality detection and evaluation of the resistance spot welding of an automobile plate are necessary for guaranteeing the safety of an automobile. The cross tensile test of welding spots is a spot welding joint evaluation method widely used in the industry at present, a sample is formed by welding two sample plates which are vertical to each other in a cross shape, and the sample plates are matched with a tensile fixture for tensile test, and because the test is carried out by adopting the sample and the fixture with specific shapes, the precision of the sample, the fixture and the assembly between the sample and the fixture can influence the test result. Three patents of Chinese patent numbers CN 104972256B, CN 206084117U and CN 208459146U all disclose positioning clamps used in the welding process of resistance spot welding cross tensile samples, and two patents of Chinese patent numbers CN 206095785U and CN111948033A all disclose tensile clamps used for cross tensile tests.

As can be seen from the above patents, the basic structure of the current cross tensile test specimen and the tensile fixture thereof is as follows: the cross tensile sample with four bolt holes is fixed on two mutually perpendicular T-shaped clamping mechanisms through bolts, the two T-shaped clamping mechanisms are composed of a transverse plate and a straight plate perpendicular to the transverse plate, the straight plate is connected to the middle position of the transverse plate, the straight plate is a clamping end, and the clamping end is used for being connected with a tensile testing machine. In order to ensure that the test result is accurate, the clamping ends and welding points of the T-shaped clamping mechanisms on the two sides of the tensile clamp are required to be on the same axis.

At present, when a cross tensile sample is assembled with a tensile fixture, the cross tensile sample is often assembled in a manual sample loading mode, four bolts for connecting the sample and the fixture are required to be screwed in the process, and the sample is complex in shape and low in general efficiency, and alignment of clamping ends of the fixture after sample loading is difficult to guarantee, so that a tensile stress-strain curve fluctuates, data stability between parallel samples is poor, and accuracy of a test result is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a car sheet resistance spot welding cross tensile sample's fixture of getting ready is provided, and this kind of fixture of getting ready can guarantee tensile fixture and cross sample assembly back about the both sides fixture add holding end department in same axis, avoid tensile process stress-strain curve's fluctuation, reduce experimental error, make under the same parameter parallel sample's measured value more stable, and then improve the tensile test efficiency of solder joint cross.

The technical scheme for solving the technical problems is as follows:

a sample loading clamp for a resistance spot welding cross tensile sample of an automobile sheet comprises a bottom plate, guide rails, a left outer baffle, a left inner baffle, a right inner baffle and a right outer baffle, wherein the bottom plate is a rectangular plate, two guide rails are fixed on the upper surface of the bottom plate in parallel along the length direction of the bottom plate, the left outer baffle, the left inner baffle, the right inner baffle and the right outer baffle are rectangular plates with the same length and width, the left outer baffle, the left inner baffle and the right inner baffle are rectangular plates, the outer baffle of right side is placed perpendicularly at the left end and the right-hand member of bottom plate, the face is perpendicular with the length direction of bottom plate, the lower terminal surface of face contacts with the upper surface of bottom plate, the outer baffle of left side, the inner baffle of right side, the lower terminal surface of the outer baffle of right side has the recess of two parallels respectively, the recess inlays on the guide rail of bottom plate, the outer baffle of left side, the inner baffle of left side, the face lower extreme and the recess of the outer baffle of right side are sliding fit with the face and the guide rail of bottom plate respectively, the outer baffle of left side, the inner baffle of right side, the face upper portion intermediate position of the outer baffle of right side has the same tensile anchor clamps fixed square hole respectively, the terminal surface size phase-match of tensile anchor clamps fixed square hole and tensile anchor clamps centre gripping end, the left side inner baffle's tensile anchor clamps fixed square hole's in left side left and right side left side both sides have left baffle bolt fixed square hole respectively, the upper and lower extreme of tensile anchor clamps fixed square hole has right side respectively right baffle bolt fixed square hole has right side square hole, the right baffle bolt fixed square hole's position respectively and corresponding with the bolt fixed square hole's bolt position of tensile anchor clamps bolt, the right side inner baffle holds the diameter of nut respectively, the right side round hole is greater than the relative round hole of nut and the nut of tensile anchor clamps, the nut holds round hole respectively, the nut holds round hole.

Above-mentioned car sheet resistance spot welding cross tensile sample's fixture of getting ready, the face upper portion of the outer baffle of left side, the inner baffle of right side, the outer baffle of right side has a plurality of connecting screw holes respectively relatively, and connecting bolt is through connecting screw hole respectively with the outer baffle of left side and the outer baffle fixed connection of the inner baffle of left side, the inner baffle of right side and the outer baffle of right side.

Above-mentioned car sheet resistance spot welding cross tensile sample's fixture that samples up, the tensile fixture fixed square hole on the face upper portion of baffle, the outer baffle in left side, the outer baffle in right side, the right side is the slot, and the slot slope is placed, and the length direction and the vertical direction of slot are 45 contained angles.

According to the sample loading fixture for the automobile sheet resistance spot welding cross tensile sample, the left baffle bolt fixing square hole and the right baffle bolt fixing square hole are rectangular holes with the same shape, and the length central axes of the left baffle bolt fixing square hole and the right baffle bolt fixing square hole are perpendicular to each other.

The utility model has the advantages that:

the upper parts of the surfaces of the left outer baffle, the left inner baffle, the right inner baffle and the right outer baffle of the utility model are respectively provided with the same fixing square holes of the stretching clamp, and the fixing square holes of the stretching clamp can be used for inserting and fixing the clamping ends of the stretching clamps at both ends; the left outer baffle, the left inner baffle, the right inner baffle and the right outer baffle can slide on the upper surface of the bottom plate through the grooves at the lower end of the plate surface, so that the stretching clamps at the two ends are fixed; the left baffle bolt fixing square hole and the right baffle bolt fixing square hole can fix the tensile clamp bolt; the nut of baffle in the right side holds the round hole and can let tensile anchor clamps nut pass through.

The utility model discloses simple structure, convenient to use can guarantee effectively that the exposed core of both sides anchor clamps is in same axis about tensile anchor clamps and the cross sample assembly back, and then effectively avoid tensile process stress-strain curve's fluctuation, reduce experimental error, make under the same parameter parallel appearance the measured value more stable, and then improve the tensile test efficiency of solder joint cross.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a front view of the left and right outer baffles;

FIG. 3 is a front view of the left inner barrier;

FIG. 4 is a front view of the right inner barrier;

FIG. 5 is a schematic view of a cross tensile specimen and tensile fixture assembly;

fig. 6 is a schematic view of the usage state of the present invention;

fig. 7 is a continuous schematic view of the use state of fig. 6.

The figures are labeled as follows: bottom plate 1, left side outer baffle 2, baffle 3 in the left side, baffle 4 in the right side, baffle 5 in the right side, guide rail 6, tensile anchor clamps fixed square hole 7, left baffle bolt fastening square hole 8, right baffle bolt fastening square hole 9, nut hold round hole 10, recess 11, cross tensile sample 12, T clamp mechanism 13, cushion 14, bolt 15, nut 16, connect screw 17, connecting bolt 18.

Detailed Description

The utility model discloses a baffle 5, guide rail 6 in baffle 3, right side in baffle 4, the right side in bottom plate 1, the outer baffle 2 in left side, the left side.

Fig. 1 shows that the bottom plate 1 is a rectangular plate, and two guide rails 6 are fixed on the upper surface of the bottom plate 1 in parallel along the length direction of the bottom plate 1. The cross section of the guide rail 6 is a regular geometric shape, which may be a rectangle, an inverted trapezoid, a circle, etc., and the cross section of the guide rail 6 is shown as a circle.

Fig. 1 shows that the left outer baffle 2, the left inner baffle 3, the right inner baffle 4 and the right outer baffle 5 are rectangular plates with the same length and width. Baffle 2, baffle 3 in the left side, baffle 4 in the right side, the outer baffle 5 in the right side are placed perpendicularly at the left end and the right-hand member of bottom plate 1, and the face is perpendicular with the length direction of bottom plate 1, and the lower terminal surface of face contacts with the upper surface of bottom plate 1.

Fig. 1 shows that the lower end faces of the left outer baffle 2, the left inner baffle 3, the right inner baffle 4 and the right outer baffle 5 are respectively provided with two parallel grooves 11, the grooves 11 are embedded on the guide rails 6 of the bottom plate 1, and the lower ends of the plates of the left outer baffle 2, the left inner baffle 3, the right inner baffle 4 and the right outer baffle 5 and the grooves 11 are respectively in sliding fit with the plates of the bottom plate 1 and the guide rails 6. Baffle 2, baffle 3 in the left side, baffle 4 in the right side, the outer baffle 5 in the right side can slide on 1 upper surface of bottom plate, reach the effect of the tensile anchor clamps at fixed both ends.

Fig. 2, 3 and 4 show that the middle positions of the upper parts of the left outer baffle 2, the right inner baffle 3, the right outer baffle 4 and the right outer baffle 5 are respectively provided with the same stretching clamp fixing square hole 7, the stretching clamp fixing square hole 7 is matched with the end face size of the stretching clamp clamping end, the stretching clamp fixing square hole 7 is a rectangular hole, the rectangular hole is obliquely arranged, and the length direction of the rectangular hole is 45 degrees of included angle with the vertical direction. The straight rod at the clamping end of the T-shaped stretching clamp can be inserted into the fixing square hole 7 of the stretching clamp.

Fig. 3 shows that left baffle bolt fixing square holes 8 are respectively formed in the left side and the right side of the stretching clamp fixing square hole 7 of the left inner baffle 3, and the positions of the left baffle bolt fixing square holes 8 respectively correspond to the positions of stretching clamp bolts.

Fig. 4 shows that the upper end and the lower end of the stretching jig fixing square hole 7 of the right inner baffle 4 are respectively provided with a right baffle bolt fixing square hole 9, and the positions of the right baffle bolt fixing square holes 9 respectively correspond to the positions of stretching jig bolts. Baffle 4 has the nut to hold round hole 10 respectively in tensile anchor clamps fixed square hole 7 both sides, and the diameter that the nut held round hole 10 is greater than tensile anchor clamps nut, and the position that the nut held round hole 10 is relative with tensile anchor clamps bolt, and the nut holds round hole 10 and can let tensile anchor clamps nut pass through.

Fig. 3 and 4 show that the left baffle bolt fixing square hole 8 and the right baffle bolt fixing square hole 9 are rectangular holes with the same shape respectively, and the length central axes of the left baffle bolt fixing square hole 8 and the right baffle bolt fixing square hole 9 are perpendicular to each other.

Fig. 1, 2, 3 and 4 show that a plurality of connection screw holes 17 are respectively arranged on the upper parts of the surfaces of the left outer baffle 2, the left inner baffle 3, the right inner baffle 4 and the right outer baffle 5, and the connection bolts 18 are respectively fixedly connected with the left outer baffle 2, the left inner baffle 3, the right inner baffle 4 and the right outer baffle 5 through the connection screw holes 17. In use, the left outer barrier 2 and the left inner barrier 3, and the right inner barrier 4 and the right outer barrier 5 move as a unit, respectively.

The utility model discloses a use as follows:

step 1:

fig. 6 shows that 4 bolts 15 are installed in the left baffle bolt fixing square hole 8 and the right baffle bolt fixing square hole 9 of the left inner baffle 3 and the right inner baffle 4, the two T-shaped clamping mechanisms 13 are respectively located between the left inner baffle 3 and the right inner baffle 4, the straight rods at the clamping ends of the two T-shaped clamping mechanisms 13 are respectively inserted into the stretching clamp fixing square holes 7 of the left inner baffle 3, the left outer baffle 2, the right inner baffle 4 and the right outer baffle 5 in sequence, and the bolts 15 are allowed to pass through bolt holes in the transverse plates of the two T-shaped clamping mechanisms 13;

step 2:

and (3) enabling the welded cross tensile sample 12 to be close to and fixed on a T-shaped clamping mechanism 13 on the left side, pressing a cushion block 14 on the cross tensile sample 12, enabling a bolt 15 to penetrate through a screw hole in the cushion block 14, then screwing the bolt 15 with a nut 16, and tightly pressing the cross tensile sample with the cushion block. The cross tensile specimen 12 is fixed to the left T-clamp 13.

And step 3:

fig. 7 shows that, the left outer baffle 2 and the left inner baffle 3, the fixed left T-shaped clamping mechanism 13 and the fixed cross tensile sample 12 are integrally moved to the right along the guide rail 6, and then the fixed left T-shaped clamping mechanism 13 and the fixed cross tensile sample 12 are continuously moved to the right to enable the cross tensile sample 12 to be close to the T-shaped clamping mechanism 13 fixed to the right while keeping the left outer baffle 2 and the left inner baffle 3 stationary, which is to say, the process is careful to ensure that the straight rod at the clamping end of the left T-shaped clamping mechanism 13 does not separate from the square fixing hole 7 of the tensile clamp of the left outer baffle 2 and the left inner baffle 3, and the operation of step 2 is repeated to complete the fixation of the cross tensile sample 12 and the right T-shaped clamping mechanism 13, as shown in fig. 7. And (4) moving the left baffle to the left, and taking down the two assembled T-shaped clamping mechanisms 13 and the sample 12 to perform the tensile test.

The utility model discloses an embodiment as follows:

the length of the bottom plate 1 is 350mm, the width is 200mm, and the thickness is 15mm;

the height of the left outer baffle 2, the left inner baffle 3, the right inner baffle 4 and the right inner baffle 5 is 200mm, the width is 150mm, and the thickness is 12mm;

the length of the fixing square hole 7 of the stretching clamp is 50mm, and the width of the fixing square hole is 12mm;

the left baffle bolt fixing square hole 8 and the right baffle bolt fixing square hole 9 are 27mm in length and 50mm in width;

the nut receiving bore 10 is 30mm in diameter.

Claims (4)

1. The utility model provides a car sheet resistance spot welding cross tensile test's clamping apparatus that takes a sample which characterized in that: the guide rail structure comprises a bottom plate (1), guide rails (6), a left side outer baffle (2), a left side inner baffle (3), a right side inner baffle (4) and a right side outer baffle (5), wherein the bottom plate (1) is a rectangular plate, the two guide rails (6) are fixed on the upper surface of the bottom plate (1) in parallel along the length direction of the bottom plate (1), the left side outer baffle (2), the left side inner baffle (3), the right side outer baffle (5) are rectangular plates with the same length and width, the left side outer baffle (2), the left side inner baffle (3), the right side inner baffle (4) and the right side outer baffle (5) are vertically arranged at the left end and the right end of the bottom plate (1), the plate surface is vertical to the length direction of the bottom plate (1), the lower end surface of the plate surface is in contact with the upper surface of the bottom plate (1), the left side outer baffle (2), the left side inner baffle (3), the right side inner baffle (4) and the right side outer baffle (5) are respectively provided with two parallel grooves (11), the grooves (11) are clamped on the guide rails (6) of the bottom plate (1), the left side outer baffle (2), the left side inner baffle (3), the right side inner baffle (4) is in sliding fit with the guide rails (6) and the right side outer baffle (1), the left outer baffle (2), the left inner baffle (3), the right inner baffle (4), the upper middle position of the plate surface of the right outer baffle (5) is provided with the same stretching clamp fixing square hole (7) respectively, the stretching clamp fixing square hole (7) is matched with the end face size of the stretching clamp clamping end, the left side and the right side of the stretching clamp fixing square hole (7) of the left inner baffle (3) are provided with a left baffle bolt fixing square hole (8) respectively, the upper end and the lower end of the stretching clamp fixing square hole (7) of the right inner baffle (4) are provided with a right baffle bolt fixing square hole (9) respectively, the positions of the left baffle bolt fixing square hole (8) and the right baffle bolt fixing square hole (9) are corresponding to the position of a bolt (15) of a stretching clamp respectively, the right inner baffle (4) is provided with a nut on two sides of the stretching clamp fixing square hole (7) respectively to accommodate a round hole (10), the diameter of the nut accommodating round hole (10) is larger than the outer diameter of the nut (16) of the stretching clamp, and the round hole (10) is opposite to the bolt (15) of the stretching clamp.

2. The loading fixture for the resistance spot welding cross tensile test of the automobile sheet according to claim 1, characterized in that: the upper parts of the surfaces of the left outer baffle (2), the left inner baffle (3), the right inner baffle (4) and the right outer baffle (5) are respectively provided with a plurality of connecting screw holes (17) which are opposite to each other, and the connecting bolts (18) are respectively fixedly connected with the left outer baffle (2), the left inner baffle (3), the right inner baffle (4) and the right outer baffle (5) through the connecting screw holes (17).

3. The loading fixture for the resistance spot welding cross tensile test of the automobile sheet according to claim 1, characterized in that: the drawing fixture fixing square hole (7) on the upper portion of the plate surface of the left outer baffle (2), the left inner baffle (3), the right inner baffle (4) and the right outer baffle (5) is a rectangular hole, the rectangular hole is obliquely placed, and the length direction of the rectangular hole and the vertical direction are 45-degree included angles.

4. The loading fixture for the resistance spot welding cross tensile test of the automobile sheet according to claim 1, characterized in that: the left baffle bolt fixing square hole (8) and the right baffle bolt fixing square hole (9) are rectangular holes with the same shape, and the length central axes of the left baffle bolt fixing square hole (8) and the right baffle bolt fixing square hole (9) are perpendicular to each other.

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