Detection tool for detecting location degree of welding nut
By designing a test tool system for detecting nuts, using the combination of marking devices and guide rods, the problem that the prior art cannot detect welding accuracy is solved, and the precise detection and data calculation of the nut position is realized, which satisfies the automotive parts High precision requirements.
Patent Information
- Application Number
- CN202420061649.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-10
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-01-10
AI Technical Summary
The prior art cannot effectively detect the accuracy data after nut welding, resulting in huge errors during subsequent assembly, which cannot meet the high requirements for welding nut accuracy of automotive parts.
A detection system including inspection tool one and inspection tool two is designed. Through the combination of marking device and guide rod, the threaded guide rod and guide light rod are used to weld and combine with the connecting rod, and the marking tip and cavity are set to realize butt welding nuts. All-round detection of position and calculation of accuracy data by measuring scribing circle marks.
It realizes all-round detection of the position accuracy of welding nuts in complex parts, provides reliable accuracy data, simplifies the inspection process, and meets the high-precision requirements of automotive parts.
Smart Images
Figure CN222317883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a checking tool for checking the position of a nut after welding. Background Art
[0002] In recent years, with the rapid development of the automobile industry, automobile production and variety have continued to increase, and the requirements for welding precision of automobile parts have become increasingly higher.
[0003] At present, the technology of welding nuts for automotive parts is very mature, but there are large deviations in the accuracy detection of nuts after welding. The traditional method of detecting the position of nuts after welding is to place the automotive parts on the inspection fixture for positioning, use the corresponding inspection pin, and after passing the nut, confirm whether the inspection pin can be inserted into the pin sleeve of the inspection fixture body. This method can only determine whether the accuracy of automotive parts after welding nuts is qualified, but it cannot obtain specific accuracy data. This will lead to huge errors in the subsequent assembly and precision adjustment of automotive parts, causing many uncertainties in the precision adjustment of welding nut parts. Summary of the invention
[0004] In order to overcome the deficiency that the accuracy data of nuts cannot be detected after welding, the invention of the utility model aims to provide a gauge for detecting the position of welded nuts to meet the accuracy requirements of nuts of automobile parts after welding.
[0005] In order to achieve the above-mentioned purpose of the invention, the inspection tool of the utility model mainly includes inspection tool 1 and inspection tool 2; the device 1 and the device 2 of the inspection tool 1 are connected and fixed by positioning screws.
[0006] Furthermore, the marking device of the device 1 is welded together by welding the threaded guide rods or guide light rods on both sides with the connecting rod, a marking tip is provided on the marking device, and a cavity 1 for avoiding the welding nut of the parts is provided inside the marking device.
[0007] Furthermore, the connecting hole at one end of the knurled pin handle of the device 2 is connected to the connecting rod of the device 1, and the positioning screw installed on the positioning hole of the device 2 positions the connecting rod in the connecting hole.
[0008] Furthermore, the body of the second inspection fixture is an L-shaped structure, positioning pins are installed on both sides of the guide hole, and a cavity 2 is provided in the body for avoiding the welding nuts of the parts.
[0009] Furthermore, the centers of the device 1 and the device 2 are concentric.
[0010] Furthermore, the marking device of the device one is a hollow cylindrical structure, and the marking tip is arranged on the outer circle of the open end; the threaded guide rod is threadedly matched with the threaded hole of the welding nut of the part; the guide light rod and the threaded hole of the welding nut are clearance matched, and are transition matched with the guide hole of the inspection fixture two.
[0011] Furthermore, the front face of the second inspection fixture is the positioning face of the back face of the part, and the front profile of the second inspection fixture is matched with the back profile of the part.
[0012] Furthermore, the vertical plate body, horizontal plate body and the arc transition surface between the two inspection fixture bodies are adapted to the vertical plate, horizontal plate and the arc transition surface between the parts; the center of the guide hole in the middle of the horizontal plate body is concentric with the center of the threaded hole of the welding nut of the part; the positioning pins on both sides of the guide hole are adapted to the hole one of the part; the second cavity for avoiding the welding nut of the part is a circular hole, the second cavity is located above the guide hole, and the diameter of the second cavity is larger than the outer contour size of the welding nut of the part.
[0013] Compared with the prior art, the utility model can realize all-round detection of the position accuracy of welding nuts of complex parts and can calculate the accuracy data, providing a reliable basis for the accuracy adjustment of automobile parts during subsequent assembly. It has a simple structure and is convenient and quick to detect, and can fully meet the product accuracy requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model is a schematic diagram of the structure of the inspection tool 1.
[0015] Figure 2 for Figure 1 A schematic structural diagram of a device with a threaded guide rod.
[0016] Figure 3 The utility model is a simplified structural diagram of a device with a guide light rod.
[0017] Figure 4 for Figure 1 A schematic structural diagram of device 2.
[0018] Figure 5 This is a schematic diagram of the structure of the second inspection tool of the utility model.
[0019] Figure 6 The utility model is a schematic diagram of the structure of a checking fixture for marking the front surface of a part.
[0020] Figure 7 for Figure 6 Schematic diagram of the line drawing.
[0021] Figure 8 The utility model is a schematic structural diagram in which a part is placed on the front of a second inspection fixture and a device with a guide light rod marks the front of the part.
[0022] Fig. 9 for Figure 8 Schematic diagram of the line drawing.
[0023] Fig.10 It is a schematic diagram of the accuracy calculation when the welding nut of the utility model is welded on the front side of the plate.
[0024] Fig.11 The utility model is a schematic structural diagram of a device with a guide light rod for marking a line on the front side of a part when a welding nut is welded on the back side of a plate.
[0025] Fig.12 for Fig.11 Schematic diagram of the line drawing.
[0026] In the figure: 1, device one; 101-1, threaded guide rod; 101-2, guide light rod; 102, marking device; 102-1, marking tip; 102-2, cavity one; 103, connecting rod; 2, device two; 201, knurled pin handle; 202, positioning hole; 203, connecting hole; 3, positioning top screw; 4, inspection fixture two; 401, body; 401-1, vertical plate; 401-2, horizontal plate; 402, positioning pin; 403, guide hole; 404, cavity two; 5, parts; 501-1, vertical plate; 501-2, horizontal plate; 502, hole one; 503, welding nut; 504, hole two; 6, marking circle mark one; 7, marking circle mark two; 8, marking circle mark three. DETAILED DESCRIPTION
[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 As shown, the inspection tool of the present invention comprises an inspection tool 1 and an inspection tool 2 4 .
[0028] Device 1 1 and device 2 2 of the inspection fixture 1 are connected and fixed via positioning screws 3, and the centers of device 1 1 and device 2 2 are concentric.
[0029] The marking device 102 of the device 1 is welded together by the threaded guide rods 101-1 or the guide light rods 101-2 on both sides and the connecting rod 103; the marking device 102 is provided with a marking tip 102-1, and the marking device 102 is provided with a cavity 102-2 for avoiding the welding nut 503 of the part 5; the marking device 102 is a hollow cylindrical structure, and the marking tip 102-1 is arranged on the outer circle of the open end; the threaded guide rod 101-1 is threadedly matched with the threaded hole of the welding nut 503 of the part 5; the guide light rod 101-2 is clearance matched with the threaded hole of the welding nut 503, and is transition matched with the guide hole 403 of the inspection fixture 2 4.
[0030] The connecting hole 203 at one end of the knurled pin handle 201 of the device 2 is connected to the connecting rod 103 of the device 1, and the positioning top screw 3 installed on the positioning hole 202 of the device 2 positions the connecting rod 103 in the connecting hole 203.
[0031] The body 401 of the second inspection tool 4 is an L-shaped structure, and can also be designed into other structures according to the shape of the part 5. The positioning pins 402 are installed on both sides of the guide hole 403, and a cavity 404 for avoiding the welding nut 503 of the part 5 is provided in the body 401; the front of the second inspection tool 4 is the positioning surface of the back of the part 5, and the front profile of the second inspection tool 4 is adapted to the back profile of the part 5; the vertical plate 401-1, the horizontal plate 401-2 of the body 401 of the second inspection tool 4 and the arc transition surface therebetween are aligned with the vertical profile of the part 5 The plate 501-1, the horizontal plate 501-2 and the arc transition surface therebetween are adapted to each other; the center of the guide hole 403 in the middle of the horizontal plate body 401-2 is concentric with the center of the threaded hole of the welding nut 503 of the part 5; the positioning pins 402 on both sides of the guide hole 403 are adapted to the hole 1 502 of the part 5; the cavity 2 404 for avoiding the welding nut 503 of the part 5 is a circular hole, the cavity 2 404 is located above the guide hole 403, and the diameter of the cavity 2 404 is larger than the outer contour size of the welding nut 503 of the part 5.
[0032] like Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, it is the precision detection process when the welding nut 503 of the part 5 of the utility model is welded to the front side of the plate.
[0033] (a) The operator places the part 5 to be inspected on the workbench;
[0034] (b) If Figure 6 , Figure 7As shown, the device 1 with the threaded guide rod 101-1 is connected to the device 2 2, and the knurled pin handle 201 is held by hand to screw the threaded guide rod 101-1 into the threaded hole of the welding nut 503 of the part 5. At this time, the welding nut 503 will enter the cavity 102-2. During the hand-screwing process, the marking tip 102-1 leaves a marking circular mark 6 on the front of the horizontal plate 501-2 of the part 5;
[0035] (c) If Figure 8 , Fig. 9 As shown, the device 1 with the guide light rod 101-2 is connected to the device 2 2, the hole 1 502 of the part 5 is positioned on the positioning pin 402 of the second inspection fixture 4, the part 5 is placed on the front of the second inspection fixture 4, the knurled pin handle 201 is held, and the guide light rod 101-2 is inserted into the guide hole 403 of the second inspection fixture 4, when the scribing tip 102-1 contacts the front of the horizontal plate 501-2 of the part 5, the knurled pin handle 201 is rotated, and the scribing tip 102-1 leaves a scribing circular mark 27 on the front of the horizontal plate 501-2;
[0036] (d) If Fig.10 As shown, a vernier caliper is used to measure the longest distance dimension a between the line connecting the scribe circle mark 1 6 and the scribe circle mark 2 7 in the diameter direction, which is the position offset of the welding nut 503 .
[0037] like Fig.11 , Fig.12 As shown, it is the precision detection process when the welding nut 503 of the part 5 of the utility model is welded to the back side of the plate.
[0038] (a) An operator connects device 1 with a guide light rod 101-2 to device 2;
[0039] (b) Position the hole 1 502 of the part 5 on the positioning pin 402 of the second inspection fixture 4, place the part 5 on the front of the second inspection fixture 4, and let the welding nut 503 fall into the second cavity 404;
[0040] (c) Insert the guide light rod 101-2 into the guide hole 403 of the inspection fixture 2. When the marking tip 102-1 contacts the front face of the horizontal plate 501-2 of the part 5, rotate the knurled pin handle 201, and the marking tip 102-1 leaves a marking circular mark 38 on the front face of the horizontal plate 501-2;
[0041] (d) Use a vernier caliper to measure the maximum distance c between the scribed circular mark 8 and the edge of the hole 504 of the part 5 in the diameter direction, and then use a vernier caliper to measure the minimum distance b between the scribed circular mark 8 and the edge of the hole 504 of the part 5 in the diameter direction, and calculate (maximum distance c-minimum distance b) / 2, which is the position offset of the welding nut 503.
Claims
1. A gauge for detecting the position of a welding nut, characterized in that: The inspection tool comprises inspection tool 1 and inspection tool 2 (4); The device 1 (1) and the device 2 (2) of the inspection tool 1 are connected and fixed via a positioning screw (3); The marking device (102) of the device 1 (1) is welded together by welding the threaded guide rods (101-1) or the guide light rods (101-2) on both sides thereof with the connecting rod (103), the marking device (102) is provided with a marking tip (102-1), and the marking device (102) is provided with a cavity 1 (102-2) for avoiding the welding nut (503) of the part (5); The connecting hole (203) at one end of the knurled pin handle (201) of the second device (2) is connected to the connecting rod (103) of the first device (1), and the positioning screw (3) installed on the positioning hole (202) of the second device (2) positions the connecting rod (103) in the connecting hole (203); The body (401) of the second inspection tool (4) is an L-shaped structure, and the positioning pins (402) are installed on both sides of the guide hole (403). The body (401) is provided with a second cavity (404) for avoiding the welding nut (503) of the part (5).
2. A gauge for detecting the position of a welding nut according to claim 1, characterized in that: The centers of the device 1 (1) and the device 2 (2) are concentric.
3. A gauge for detecting the position of a welding nut according to claim 1, characterized in that: The marking device (102) of the device one (1) is a hollow cylindrical structure, and the marking tip (102-1) is arranged on the outer circle of the open end; the threaded guide rod (101-1) is threadedly matched with the threaded hole of the welding nut (503) of the part (5); the guide light rod (101-2) is clearance-matched with the threaded hole of the welding nut (503) and transition-matched with the guide hole (403) of the second inspection fixture (4).
4. A gauge for detecting the position of a welding nut according to claim 1, characterized in that: The front face of the second inspection fixture (4) is the positioning face of the back face of the part (5), and the front profile of the second inspection fixture (4) is matched with the back profile of the part (5).
5. A gauge for detecting the position of a welding nut according to claim 1, characterized in that: The vertical plate (401-1), horizontal plate (401-2) and the arc transition surface therebetween of the main body (401) of the second inspection fixture (4) are matched with the vertical plate (501-1), horizontal plate (501-2) and the arc transition surface therebetween of the part (5); the center of the guide hole (403) in the middle of the horizontal plate (401-2) is concentric with the center of the threaded hole of the welding nut (503) of the part (5); the positioning pins (402) on both sides of the guide hole (403) are matched with the hole (502) of the part (5); the second cavity (404) for avoiding the welding nut (503) of the part (5) is a circular hole, the second cavity (404) is located above the guide hole (403), and the diameter of the second cavity (404) is larger than the outer contour size of the welding nut (503) of the part (5).