High-precision positioning device for welding engine cover

Abstract

The invention relates to the technical field of electromechanical equipment installation, and discloses a welding engine cover high-precision positioning device which comprises a vertical triangular supporting system and a horizontal triangular positioning system. The vertical triangular supporting system comprises a vertically-installed frame, and the frame is used for bearing installation of other structural parts of the positioning device. The horizontal triangular positioning system comprises a lower-layer triangular structure which comprises a first positioning part installed at the front end of the lower portion of the frame and second positioning parts installed on the left side and the right side of the rear end of the lower portion of the frame. A first profiling block is installed at the front end of the upper portion of the frame, a second profiling block is installed at the rear end of the upper portion of the frame, and a first positioning pin extending upwards is arranged on one side of the rear end of the lower portion of the frame. When the positioning device is used for assembling the engine cover, the device is placed on the lower portion with a fender hole as the reference, the positioning hole in the upper end is placed at the fixed position, the profiling block can be rapidly attached to the body in white, fixing screws are installed immediately, assembling is completed, the device is taken out, and the engine cover is covered.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body installation tooling, in particular to a high-precision positioning device for welding an engine cover. Background Art

[0002] In the increasingly mature automobile manufacturing industry, welding processes are constantly being optimized, and safety and efficiency are better guaranteed. With the maturity of automobile production technology, automobile welding methods and assembly accuracy are also becoming more and more perfect. As one of the important processes in the assembly of the body-in-white, the installation of the engine hood has an important impact that cannot be ignored in the assembly process of the automobile welding workshop. Due to the large-scale production of vehicles, the installers will be in a long-term high-load working state, resulting in large tolerances, low precision, and a large amount of adjustment required for the assembly of the body-in-white engine hood. It may even cause the engine hood or other parts to be scrapped when adjusting the welding posture. We need an auxiliary tool that can quickly assemble the engine hood, has a small assembly tolerance, high assembly precision, small adjustment, and low labor intensity to assist personnel in the operation, so that the engine hood can be installed smoothly and quickly, and the work task can be completed with quality and quantity. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a high-precision positioning device for welding an engine cover, which solves the existing problems.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a high-precision positioning device for welding an engine cover, comprising a vertical triangular support system and a horizontal triangular positioning system;

[0005] The vertical triangular support system includes a vertically mounted frame, which is used to support the installation of other structural components of the positioning device;

[0006] Horizontal triangular positioning system: includes a lower triangular structure: a first positioning part installed at the front end of the lower part of the frame and a second positioning part installed on the left and right sides of the rear end of the lower part of the frame. The first positioning part and the second positioning part are both used to position the fender;

[0007] It also includes an upper triangular structure: a first profiling block is installed at the upper front end of the frame, a second profiling block is installed at the upper rear end of the frame, and a first positioning pin extending upward is provided on one side of the lower rear end of the frame. The first positioning pin, the first profiling block and the second profiling block are all used to position the lower end surface of the engine cover.

[0008] Preferably, the frame body is a right-angled triangle structure, and the connection between the two right-angled sides of the frame and the inclined surface adopts chamfered transition.

[0009] Preferably, the frame body is a hollow structure, with a reinforcing longitudinal beam installed in the middle.

[0010] Preferably, the first positioning portion includes a second positioning pin and a third contoured block arranged on a side of the second positioning pin.

[0011] Preferably, the second positioning portion includes a fourth profiling block arranged on one side of the lower portion of the frame, and a fifth profiling block arranged on the other side of the lower portion of the frame.

[0012] Preferably, a third positioning pin is provided on one side of the fifth profiling block.

[0013] Preferably, the second locating pin and the third locating pin are both used to connect with the body locating circular hole of the fender, and the direction of the line connecting the two body locating holes corresponding to the second locating pin and the third locating pin is parallel to the direction of the body coordinate system, and the surface where the two body locating holes are located is parallel to the main plane of the body.

[0014] Preferably, the second locating pin and the third locating pin are arranged along the front-rear length direction of the frame, and the front-rear length value of the frame is designed with reference to the distance between the vehicle body locating holes corresponding to the second locating pin and the third locating pin.

[0015] Preferably, the second positioning portion is mounted on a crossbeam, the crossbeam is fixedly connected to the rear end outer side of the frame, and the crossbeam is vertically connected to one side of the frame, and a triangular reinforcement frame is provided on the side wall of the vertical connection.

[0016] Preferably, the lower end surfaces of the third profiling block, the fourth profiling block, and the fifth profiling block are all step structures.

[0017] In summary, the present invention has at least one of the following beneficial effects:

[0018] When using this positioning device to assemble the engine hood, the lower part is placed based on the fender hole, and the upper positioning hole is placed in a fixed position. The contour block will quickly fit the body-in-white, and then the fixing screws are directly installed. After assembly is completed, the device is removed and the engine hood is closed.

[0019] The positioning device as a whole is composed of three triangular structures, namely a vertical triangular system, which is used to provide a stable shape for the positioning device body to prevent deformation of the positioning device itself, and two horizontal triangular systems. The two horizontal triangular systems correspond to the positioning of the fender and the positioning of the engine hood respectively. The stable limit of the positioning device body and the two body structures maintains a high stability and provides a stable installation environment for the assembly of the engine hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the present invention from another perspective;

[0022] Figure 3This is a schematic diagram of the bottom structure of the present invention;

[0023] Figure 4 This is a structural diagram of the guide plate and the wire clamping seat of the present invention;

[0024] Figure 5 Schematic diagram of the driving structure of the motor of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-3 , a high-precision positioning device for welding an engine cover, comprising a vertical triangle support system and a horizontal triangle positioning system;

[0027] The vertical triangular support system includes a vertically mounted frame 1, which is used to support the installation of other structural members of the positioning device; Figure 1 As shown, the main body of the frame 1 is a right-angled triangle structure. The connection between the two right-angled sides of the frame 1 and the inclined surface adopts chamfered transition to avoid sharp corners. In addition, the design of adding small horizontal / longitudinal beams here can extend a better structural installation position.

[0028] When designing the positioning device, first determine the angle of the positioning device to the engine cover, which is actually the angle of the frame. In this embodiment, 30 degrees is the best. Figure 3 as well as Figure 4 shown.

[0029] Frame 1 is a hollow structure with a reinforcing longitudinal beam 11 installed in the center. Crafted from aluminum alloy, frame 1 utilizes the principle of triangular stability to effectively disperse external forces, providing solid and stable mechanical support for the entire assembly. Forming an integrated whole with the other components of frame 1, it effectively supports and positions the welded hood assembly.

[0030] Furthermore, the hollowed-out frame 1, constructed from aluminum alloy, combines strength and lightweight properties. It supports and secures other components, ensuring overall stability. While ensuring sufficient mechanical strength to withstand the workpiece and the forces generated during machining, it effectively reduces the weight of the fixture itself, significantly facilitating installation and handling. This makes the fixture easy to carry and install, while ensuring high machining accuracy and meeting the strict dimensional accuracy and geometric tolerance requirements of the fixture. Its excellent corrosion resistance ensures long-term stability and reduces maintenance costs.

[0031] Horizontal triangular positioning system: includes a lower triangular structure: a first positioning portion installed at the front end of the lower portion of the frame 1 and a second positioning portion installed at the left and right sides of the rear end of the lower portion of the frame 1. The first positioning portion and the second positioning portion are both used to position the fender;

[0032] Reference Figure 1 and Figure 2 As shown, the first positioning portion includes a second positioning pin 8 and a third profiling block 7 arranged on the side of the second positioning pin 8 .

[0033] The second positioning portion includes a fourth profiling block 10 provided on one side of the lower portion of the frame 1 and a fifth profiling block 5 provided on the other side of the lower portion of the frame 1. A third positioning pin 6 is provided on one side of the fifth profiling block 5.

[0034] Reference Figure 3 as well as Figure 4 As shown, the second and third locating pins 8 and 6 are both used to engage with the body locating holes in the fender. The line connecting the two corresponding body locating holes is parallel to the body coordinate system, and the planes on which the two body locating holes are located are parallel to the main plane of the body. The second and third locating pins 8 and 6 are arranged along the front-to-back length of the frame 1. The front-to-back length of the frame is designed based on the distance between the corresponding body locating holes of the second and third locating pins 8 and 6.

[0035] In the above steps, after the overall shape of the frame 1 is determined in the design of the positioning device, the overall size of the frame 1 needs to be further determined. First, the original positioning holes of the vehicle body need to be used as a reference. The selection rule is that the rigidity of the parts at the original positioning holes is relatively good and they are round holes; square holes and irregular holes affect the positioning accuracy, and there are sharp corners that are easily worn; nut holes cannot be used for positioning. The direction of the selected positioning hole connection line is parallel to the direction of the vehicle body coordinate system, and the positioning surface is parallel to the main plane, so the two points on the fender where the connection line is parallel to the direction of the vehicle body coordinate system are determined. In a preferred embodiment, the distance between the two qualified positioning holes is 277.64 mm, and the length of the triangular frame 1 is predetermined based on this. During actual installation, the positioning pins need to be installed with the frame 1 through the fasteners 9 shown in the figure, so the size occupied by the fasteners 9 needs to be taken into account to finally determine the size of the frame.

[0036] After determining the locating pins that engage the fender, contour blocks are placed on the sides of the two locating pins, tailored to the perimeter of the corresponding holes, to assist in positioning. Specifically, the locating pins and contour blocks are used at both ends in the longitudinal direction for positioning. A fourth contour block 10 is also added on the other side of the rear end for additional positioning. The fourth contour block 10, combined with the two sets of locating pins and contour blocks along the longitudinal direction, forms a triangular structure. It is worth noting that the lower end surfaces of the contour blocks used to position the fender—including the third contour block 7, the fourth contour block 10, and the fifth contour block 5—all have stepped structures. Therefore, at the outset of the design, it was necessary to identify an area on the fender body that would align with the stepped structure. The stepped structure allows the contour block 5 to function as a horizontal limiter, reducing the impact force between the locating pin and the locating hole. This improves the limiting capability while preventing deformation of the locating hole and the locating pin. Furthermore, the contour blocks described in this embodiment are made of polyurethane, which has a certain degree of elasticity and ensures a better fit with the limiting surface.

[0037] The lower triangular structure is mainly reflected in the triangular design of the profiling block, wherein the fifth profiling block 5 and the third profiling block 7 are arranged along the direction of the positioning pin, that is, they cooperate with the positioning pin to maintain the stability of the direction of the entire frame 1. The fourth profiling block 10 is located at the rear end of the frame 1 and extends to one side with a crossbeam 12 of a certain length, such as Figure 1 As shown, the crossbeam 12 forms a right angle with the bottom edge of the frame 1. The fourth profiling block 10 is installed at the end of the crossbeam 12, forming a horizontal triangle with the fifth profiling block 5 and the third profiling block 7. In addition, to maintain the stability of the crossbeam 12, a triangular reinforcement frame 13 is installed at the beginning of the connection between the crossbeam 12 and the frame 1.

[0038] The upper triangular structure also includes a first profiling block 2 mounted on the upper front end of the frame 1, a second profiling block 3 mounted on the upper rear end of the frame 1, and a first locating pin 4 extending upwards is provided on one side of the lower rear end of the frame 1. The first locating pin 4, the first profiling block 2, and the second profiling block 3 all serve to locate the lower end surface of the engine hood. The upper triangular structure is used to position the engine hood. The engine hood is a large stamped part with a relatively large area and weight. Without proper support, it can easily deform. Two large polyurethane profiling blocks and a locating pin form the key support points for the engine hood. Using the locating pin as a guide, the two polyurethane blocks are arranged in a three-legged arrangement, providing strong and stable support for the engine hood with high precision. This structure meets the process requirements for welding, assembly, and testing, allowing for quick, convenient, and safe support and positioning of the engine hood, ensuring assembly accuracy. By precisely positioning the workpiece, the engine hood is always correctly positioned during assembly, minimizing dimensional deviations and geometric tolerance violations caused by improper clamping.

[0039] The first profiling block 2 is a stepped structure, and is provided with an avoidance groove 21 in the middle. The avoidance groove is used to avoid the reinforcing ribs on the engine cover, thereby improving the fit with the limiting surface.

[0040] Reference Figure 1 as well as Figure 2 As shown, the first locating pin 3, the second locating pin 8 and the third locating pin 6 also form a triangular structure. In conjunction with the structure of the upper and lower profiling blocks, the limiting stability can be achieved instantly. When the locating pin is inserted into the locating hole, it directly limits the freedom of the workpiece in the plane or space, such as the freedom of movement and the freedom of rotation, so that the engine cover assembly position is instantly located with the fender hole as the reference, and the personnel can quickly complete the engine cover installation; during the use of this device, the assembly tolerance is absorbed immediately, the assembly accuracy of the engine cover is improved, and the amount of installation and adjustment is reduced.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision positioning device for welding an engine cover, characterized by: Including vertical triangle support system and horizontal triangle positioning system; The vertical triangular support system comprises a vertically mounted frame (1), the frame (1) being used for mounting other structural members of the supporting positioning device; The horizontal triangular positioning system comprises a lower triangular structure: a first positioning portion installed at the front end of the lower portion of the frame (1) and a second positioning portion installed at the left and right sides of the rear end of the lower portion of the frame (1), wherein the first positioning portion and the second positioning portion are both used for positioning the fender; The invention also comprises an upper triangular structure: a first profiling block (2) is installed at the upper front end of the frame (1), a second profiling block (3) is installed at the upper rear end of the frame (1), and a first positioning pin (4) extending upward is provided on one side of the lower rear end of the frame (1); the first positioning pin (4), the first profiling block (2) and the second profiling block (3) are all used to position the lower end surface of the engine cover.

2. The high-precision positioning device for welding an engine cover according to claim 1, characterized in that: The frame (1) body is a right-angled triangle structure, and the connection between the two right-angled sides of the frame (1) and the inclined surface adopts chamfered transition.

3. The high-precision positioning device for welding an engine cover according to claim 2, characterized in that: The frame (1) body is a hollow structure, and a reinforcing longitudinal beam (11) is installed in the middle.

4. The high-precision positioning device for welding an engine cover according to claim 1, characterized in that: The first positioning portion comprises a second positioning pin (8) and a third profiling block (7) arranged on the side of the second positioning pin (8).

5. The high-precision positioning device for welding an engine cover according to claim 4, characterized in that: The second positioning portion comprises a fourth profiling block (10) arranged on one side of the lower portion of the frame (1), and a fifth profiling block (5) arranged on the other side of the lower portion of the frame (1).

6. The high-precision positioning device for welding an engine cover according to claim 5, characterized in that: A third positioning pin (6) is provided on one side of the fifth profiling block (5).

7. The high-precision positioning device for welding an engine cover according to claim 5, characterized in that: The second positioning pin (8) and the third positioning pin (6) are both used for plugging into the body positioning circular hole of the fender, and the direction of the line connecting the two body positioning holes corresponding to the second positioning pin (8) and the third positioning pin (6) is parallel to the direction of the body coordinate system, and the surfaces where the two body positioning holes are located are parallel to the main plane of the body.

8. The high-precision positioning device for welding an engine cover according to claim 7, characterized in that: The second locating pin (8) and the third locating pin (6) are arranged along the longitudinal direction of the frame (1). The longitudinal length of the frame is designed with reference to the distance between the vehicle body locating holes corresponding to the second locating pin (8) and the third locating pin (6).

9. The high-precision positioning device for welding an engine cover according to claim 5, characterized in that: The second positioning portion is mounted on the crossbeam (12), which is fixedly connected to the outer side of the rear end of the frame (1), and the crossbeam (12) is vertically connected to one side of the frame (1), and a triangular reinforcement frame (13) is provided on the side wall of the vertical connection.

10. The high-precision positioning device for welding an engine cover according to claim 6, characterized in that: The lower end surfaces of the third profiling block (7), the fourth profiling block (10) and the fifth profiling block (5) are all step structures.

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