A body spot welding test piece tear inspection device

Abstract

This invention discloses a tear inspection device for body spot weld test pieces, including a frame (8) and a main shaft (1). The frame (8) is gantry-shaped, with symmetrical main shaft holes (11) on its two gantry columns. A main shaft (1) is fitted in the main shaft hole (11) with clearance. A main shaft cap (12) at one end of the main shaft (1) contacts the outer side of one column of the frame (8). A wheel handle (7) is connected to the other end of the main shaft (1). A washer is provided between the wheel handle (7) and the outer side of the other column of the frame (8). The wheel handle (7) is limited by a cotter pin (6) in the main shaft pin hole (14). The use of this body spot weld test piece tear inspection device can simultaneously complete the comprehensive evaluation of the appearance and melt core size of the test piece weld point (9) in a standardized, labor-saving, semi-quantitative or quantitative manner in the on-site production environment, and the inspection device has low cost.

Description

Technical Field

[0001] This invention relates to the field of inspection equipment technology for automotive parts, specifically a tear inspection device for automotive body spot weld test pieces. Background Technology

[0002] like Figure 8 The test piece 4 for spot welding of the automotive body-in-white shown here has weld point 9, which is a critical connection process. Rapid and reliable quality evaluation of this weld point is crucial. Current evaluation methods have significant shortcomings. Traditional laboratory methods, based on the shear test in GB / T 26955, rely on expensive and bulky tensile testing machines, making them unsuitable for production sites. In contrast, rapid on-site methods such as the chisel test are more efficient. Figure 9 The method shown involves using a flat chisel to cut open the weld point 9 of the spot weld test piece 4, dividing the test piece 4 into two halves, and completing a comprehensive evaluation of the appearance and weld nugget size of the weld point 9. However, the use of a flat chisel relies on manual experience, resulting in poor qualitative and repeatability of the results, and it is impossible to quantitatively evaluate the weld nugget size. Therefore, the existing technology lacks a dedicated tear inspection device for vehicle body spot weld test pieces that can simultaneously complete a comprehensive evaluation of the appearance and weld nugget size of the test piece weld point 9 in a standardized, labor-saving, semi-quantitative or quantitative manner in an on-site production environment, and is also low-cost. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a tear inspection device for vehicle body spot weld test pieces. This device can simultaneously and comprehensively evaluate the appearance and weld nugget size of test pieces in a standardized, labor-saving, semi-quantitative or quantitative manner in an on-site production environment, while also being cost-effective.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a tear inspection device for spot welding test parts of a car body, comprising a frame and a main shaft. The frame is gantry-shaped, with symmetrical main shaft holes on its two gantry columns. A clearance-fit main shaft is inserted into the main shaft hole. A main shaft cap at one end of the main shaft contacts the outer side of one column of the frame. A wheel-type handle is connected to the other end of the main shaft. A washer is provided between the wheel-type handle and the outer side of the other column of the frame. The wheel-type handle is limited by a cotter pin in the main shaft pin hole. A main shaft clamping surface is provided in the middle of the main shaft, and a main shaft clamping screw hole is provided in the middle of the main shaft clamping surface. The frame has a frame clamping surface in the middle of the crossbeam, and a frame clamping screw hole is provided in the middle of the frame clamping surface. The spindle clamping surface and the frame clamping surface are flush in the vertical direction, and the central axes of the spindle clamping screw hole and the frame clamping screw hole are located on the same vertical plane.

[0005] A further improvement is that both the wheel handle and the frame are integrally cast metal.

[0006] A further improvement is that the wheel handle is made of HT200 cast iron.

[0007] A further improvement is that the frame is made of 45# cast steel.

[0008] A further improvement is that the spindle is made of Q355 steel.

[0009] A further improvement is that the gap between the spindle and the spindle hole of the frame is 0.05 to 0.1 mm.

[0010] A further improvement is that a clamping bolt is provided in each of the frame clamping screw hole and the spindle clamping screw hole, wherein the length of the screw of the clamping bolt in the spindle clamping screw hole is less than the length of the screw hole in the spindle clamping screw hole.

[0011] A further improvement is that the main shaft and the wheel handle are connected by a rectangular surface.

[0012] A further improvement is that the diameter of the cotter pin is greater than 3.6 mm.

[0013] The beneficial effects of this invention are as follows: The use of the tear inspection device for body spot weld test pieces of the present invention can simultaneously complete the comprehensive evaluation of the appearance and melt core size of the test piece weld point 9 in a standardized, labor-saving, semi-quantitative or quantitative manner in the on-site production environment, and the inspection device has low cost. Attached Figure Description

[0014] Figure 1 This is a front view of the tear inspection device for vehicle body spot welding test pieces according to the present invention; Figure 2 for Figure 1 DD cross-section; Figure 3 This is a front view of the rack in an embodiment of the present invention; Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 Side view; Figure 6 This is a schematic diagram of the main shaft and its cross-sections in an embodiment of the present invention; Figure 7 This is a front view of the wheeled handle in an embodiment of the present invention; Figure 8 This is a perspective view of the spot welding test piece for an automotive body-in-white in an embodiment of the present invention; Figure 9 Image of a torn body spot-welded test piece in existing technology.

[0015] Figure label: 1-Spindle, 2-Spindle clamping surface, 3-Clamping bolt, 4-Spot welded test piece, 5-Frame clamping surface, 6-Cotter pin, 7-Wheel handle, 8-Frame, 9-Test piece weld point, 10-Frame clamping screw hole, 11-Frame spindle hole, 12-Spindle cap, 13-Spindle clamping screw hole, 14-Spindle pin hole, 15-Test piece clamping hole. Detailed Implementation

[0016] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0017] See Figures 1 to 8 As shown, this embodiment of the invention provides a tear inspection device for a body spot weld test piece, including a frame 8 and a main shaft 1. The frame 8 is gantry-shaped, with symmetrical main shaft holes 11 on its two gantry columns. A clearance-fitted main shaft 1 is inserted into the main shaft hole 11. A main shaft cap 12 at one end of the main shaft 1 contacts the outer side of one column of the frame 8. A wheel handle 7 is connected to the other end of the main shaft 1. A washer is provided between the wheel handle 7 and the outer side of the other column of the frame 8. The wheel handle 7 is limited by a cotter pin 6 in the main shaft pin hole 14. A main shaft clamping surface 2 is provided in the middle of the main shaft 1, and a main shaft clamping screw hole 13 is provided in the middle of the main shaft clamping surface 2. The frame 8 has a frame clamping surface 5 in the middle of the crossbeam, and a frame clamping screw hole 10 in the middle of the frame clamping surface 5. The spindle clamping surface 2 and the frame clamping surface 5 are flush in the vertical direction, and the central axes of the spindle clamping screw hole 13 and the frame clamping screw hole 10 are located on the same vertical plane; this embodiment is to ensure that the spot weld test piece 4 is conveniently and accurately installed and fixed on the tear test device.

[0018] See Figure 1 As shown, the wheel handle 7 and the frame 8 are both integrally cast metal.

[0019] See Figure 7 As shown, the wheel handle 7 is made of HT200 cast iron.

[0020] See Figure 3 As shown, the frame 8 is made of 45# cast steel.

[0021] See Figure 6 As shown, the main shaft 1 is made of Q355 steel.

[0022] See Figures 5 to 6 As shown, the gap between the spindle 1 and the spindle hole 11 of the frame is 0.05 to 0.1 mm; this embodiment is to ensure that the spindle 1 can rotate freely in the spindle hole 11 of the frame.

[0023] See Figure 2As shown, a clamping bolt 3 is provided in each of the frame clamping screw hole 10 and the spindle clamping screw hole 13. In the spindle clamping screw hole 13, the length of the screw of the clamping bolt 3 is less than the length of the screw hole of the spindle clamping screw hole 13. This embodiment is to prevent the screw of the clamping bolt 3 from being too long and interfering with the rotation of the spindle 1.

[0024] See Figures 6 to 7 As shown, the spindle 1 and the wheel handle 7 are connected by a rectangular surface; in this embodiment, the spindle 1 and the wheel handle 7 can be connected in various ways, such as keyed connection and polygonal connection, with rectangular surface connection being preferred.

[0025] See Figure 1 As shown, the diameter of the cotter pin 6 is greater than 3.6 mm; this embodiment is to ensure that the cotter pin 6 has sufficient strength, while preventing the wheel handle 7 from sliding off the main shaft 1.

[0026] The working principle of this invention is as follows: First, place the spot welding test piece 4 in the gap between the spindle clamping surface 2 and the frame clamping surface 5, and fix the two test piece clamping holes 15 of the spot welding test piece 4 to the spindle clamping surface 2 and the frame clamping surface 5 respectively by two clamping bolts 3. Then the operator applies force to turn the wheel handle 7, which drives the main shaft 1 to rotate, thereby tearing the spot welding test piece 4 into two pieces, exposing the test piece weld point 9 of the spot welding test piece 4; Finally, the torn spot weld test piece 4 was removed, and the appearance and weld nugget size of the weld point 9 on the test piece were comprehensively evaluated.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any simple modifications, equivalent substitutions, improvements, etc., made within the technical concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A tear testing device for vehicle body spot weld test pieces, comprising a frame (8) and a main shaft (1), characterized in that: The frame (8) is gantry-shaped, with symmetrical frame spindle holes (11) on its two gantry columns. A clearance-fit spindle (1) is inserted into the frame spindle hole (11). The spindle cap (12) at one end of the spindle (1) contacts the outer side of one column of the frame (8). A wheel handle (7) is connected to the other end of the spindle (1). A washer is provided between the wheel handle (7) and the outer side of the other column of the frame (8). The wheel handle (7) is limited by the cotter pin (6) in the spindle pin hole (14). A spindle clamping surface (2) is provided in the middle of the spindle (1). A spindle clamping screw hole (13) is provided in the middle of the spindle clamping surface (2). The frame (8) has a frame clamping surface (5) in the middle of the crossbeam, and a frame clamping screw hole (10) is provided in the middle of the frame clamping surface (5). The spindle clamping surface (2) and the frame clamping surface (5) are flush in the vertical direction, and the central axes of the spindle clamping screw hole (13) and the frame clamping screw hole (10) are located on the same vertical plane.

2. The tear testing device for vehicle body spot weld test pieces according to claim 1, characterized in that: The wheel handle (7) and the frame (8) are both integrally cast metal.

3. The tear testing device for vehicle body spot weld test pieces according to claim 2, characterized in that: The wheel handle (7) is made of HT200 cast iron.

4. The tear testing device for vehicle body spot weld test pieces according to claim 2, characterized in that: The frame (8) is made of 45# cast steel.

5. The tear testing device for vehicle body spot weld test pieces according to claim 1, characterized in that: The spindle (1) is made of Q355 steel.

6. The tear testing device for vehicle body spot weld test pieces according to claim 1, characterized in that: The gap between the spindle (1) and the spindle hole (11) of the frame is 0.05 to 0.1 mm.

7. The tear testing device for vehicle body spot weld test pieces according to claim 1, characterized in that: Each of the frame clamping screw hole (10) and the spindle clamping screw hole (13) is provided with a clamping bolt (3), wherein the length of the screw of the clamping bolt (3) in the spindle clamping screw hole (13) is less than the length of the screw hole in the spindle clamping screw hole (13).

8. The tear testing device for vehicle body spot weld test pieces according to claim 1, characterized in that: The main shaft (1) and the wheel handle (7) are connected by a rectangular surface.

9. The tear testing device for vehicle body spot weld test pieces according to claim 1, characterized in that: The diameter of the cotter pin (6) is greater than 3.6 mm.

Images