A kind of automobile front door frame hinge reinforcing plate testing fixture

Abstract

The application discloses a kind of automobile front door frame hinge reinforcing plate's testing fixture, belong to automobile parts lean process equipment technical field.The testing fixture includes: testing fixture body, by multiple steel plates are interlocked by positioning hole and positioning chuck and are welded into frame type structure;Testing fixture profile, for the local part profile that is cooperated with front door frame hinge reinforcing plate assembly by laser cutting, is set on testing fixture body;First positioning part, for testing fixture profile is positioned and fixed on testing fixture body;Second positioning part, for the hinge reinforcing plate to be detected is positioned and fixed on testing fixture profile.The testing fixture profile of the application directly uses real part laser cutting forming to replace traditional CNC machining, testing fixture body is positioned and welded by plate interlocking to ensure accuracy and rigidity, greatly reduce testing fixture investment cost, shorten development cycle, detection reference and assembly reference are unified, result is intuitive and reliable, can be widely popularized to the testing fixture development of similar reinforcing plate.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts lean manufacturing equipment technology, specifically relating to a fixture for a front door frame hinge reinforcement plate. Background Technology

[0002] With the rapid development and rapid iteration of the automotive industry, body panels have undergone significant changes, requiring the development of numerous molds and fixtures to ensure production. Furthermore, due to lightweight design, there are many reinforcing components in the body panels, and most of these reinforcing components are welded to fit the shape of the body panels. Under normal circumstances, these reinforcing components also require the development of molds and fixtures to ensure production.

[0003] As a part that enhances the performance of the body panel, the reinforcing plate must ensure a good fit with the surface of the body panel in order to reduce surface errors during the welding process, thereby ensuring welding reliability and meeting the performance enhancement requirements. At the same time, the holes on the reinforcing plate must be concentrically aligned with the holes of the reinforced parts to meet the corresponding parts assembly requirements.

[0004] The original design of the front door frame hinge reinforcement of a light commercial vehicle consisted of two separate, independent reinforcement plates, which were complex and had a large number of parts. Due to the need for cost reduction and improved reinforcement performance, the reinforcement plate was optimized to be an integral structure. Based on the actual situation, the new reinforcement plate requires the development of molds to ensure production. There is no need to develop special inspection tools to inspect the parts. The front door frame can be used to check the surface fit of the reinforcement plate, and on this basis, the concentricity and alignment of the holes can be checked.

[0005] Based on the above analysis, it is necessary to design and invent a fixture that can not only meet the function of part inspection, but also reduce costs, achieve the goal of short development cycle and low investment. To this end, a fixture for the reinforcing plate of the front door frame of an automobile is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a fixture for the hinge reinforcement plate of the front door frame of an automobile. This fixture can quickly inspect whether the contour surface and boundary of the hinge reinforcement plate assembly meet the specified requirements, and ensure the fit and concentricity of the holes between the hinge reinforcement plate assembly and the front door frame and outer wheel cover. This will meet the needs of product design verification, production and quality control, while significantly reducing the investment cost of the fixture and shortening the development cycle.

[0007] This invention provides a tooling for inspecting the hinge reinforcement plate of an automotive front door frame. The fixture body is composed of several steel plates that are interlocked and welded together by positioning holes and positioning clips on each steel plate. The fixture body has a frame structure. The fixture profile is set on the fixture body. The fixture profile is a partial part profile that is laser-cut and matches the front door frame hinge reinforcement plate assembly. It is used to fit the profile of the hinge reinforcement plate to be tested for inspection. The first positioning part is disposed between the fixture body and the fixture surface, and is used to position and fix the fixture surface on the fixture body; The second positioning part is set on the fixture body and is used to position and fix the hinge reinforcement plate to be inspected on the fixture surface.

[0008] As a further technical solution of the present invention, the inspection fixture body includes: Two side panels are vertically arranged on the left and right sides of the fixture body, and several first positioning holes are opened on each side panel; Multiple bottom support plates are vertically set between two side wall plates. Each bottom support plate has a positioning clip at both ends. The positioning clip is inserted into the first positioning hole and welded to fix it. The upper boundary shape of the bottom support plate is formed by laser cutting based on the outer contour surface of the front door frame part. Multiple reinforcing plates are installed at the corners where the side wall panels and the bottom support plates connect and / or at the lower end of the bottom support plates to enhance the rigidity of the fixture body.

[0009] Furthermore, the first positioning hole is a rectangular positioning hole, the positioning clip is a rectangular clip that matches the rectangular positioning hole, the bottom surface of the bottom support plate is located on the same horizontal plane, and the lower end of each bottom support plate is reserved with a slot, and each slot is arranged on the same straight line.

[0010] Furthermore, the multiple bottom support plates are arranged from top to bottom as the first bottom support plate, the second bottom support plate, the third bottom support plate, the fourth bottom support plate, and the fifth bottom support plate; the reinforcing plate includes eight triangular reinforcing plates and one rectangular reinforcing plate. The triangular reinforcing plates are located at the corners where the side wall plates and the bottom support plates connect, and the rectangular reinforcing plate is welded to the lower end of the bottom support plate.

[0011] Furthermore, the fixture profile includes: The first profile is formed by laser cutting the front door frame part to remove excess parts, leaving only a local area that matches the hinge reinforcement plate. The first profile is positioned by the first positioning part and then welded and fixed to the fixture body. The first profile is used to fit with the profile of the hinge reinforcement plate except for the lower boundary. The second profile is located below the first profile. The second profile is formed by conformal laser cutting of the contour surface that mates with the outer wheel cover and the hinge reinforcement plate. The second profile is used to fit with the lower boundary profile of the hinge reinforcement plate.

[0012] Furthermore, connecting holes are provided at the bends on the left and right sides of the second profile, and the second profile is fixedly connected to the side wall plate and the first profile through threaded fasteners inserted in the connecting holes.

[0013] Furthermore, the first positioning part includes an upper positioning part and a lower positioning part: The upper positioning part is located on the upper part of the fixture body, including an upper positioning pin and an upper positioning pin fixing bracket. The upper positioning pin is fixed on the upper positioning pin fixing bracket, and the upper positioning pin fixing bracket is fixedly connected to the fixture body. The lower positioning part is located at the lower part of the fixture body, including a lower positioning pin and a lower positioning pin fixing bracket. The lower positioning pin is fixed on the lower positioning pin fixing bracket, and the lower positioning pin fixing bracket is fixedly connected to the fixture body. The fixture surface has positioning holes corresponding to the upper and lower positioning pins. The fixture surface is positioned by fitting the corresponding positioning pins into the positioning holes.

[0014] Furthermore, the second positioning unit includes a main positioning unit and a secondary positioning unit: The main positioning part is located in the middle of the fixture body, including a main positioning pin and a main positioning pin fixing bracket. The main positioning pin is fixed on the main positioning pin fixing bracket, and the main positioning pin fixing bracket is fixedly connected to the fixture body. The secondary positioning part is located at the upper left position of the fixture body, including a secondary positioning pin and a secondary positioning pin fixing bracket. The secondary positioning pin is fixed on the secondary positioning pin fixing bracket, and the secondary positioning pin fixing bracket is fixedly connected to the fixture body.

[0015] Furthermore, the secondary positioning pin fixing bracket has multiple oblong holes arranged vertically. The secondary positioning pin fixing bracket is adjustablely fixed to the fixture body by threaded fasteners passing through the oblong holes. The vertical position of the secondary positioning pin is adjusted through the oblong holes. The advantages of this invention are that, Significantly reduces manufacturing costs: The surface of the fixture is directly formed by laser cutting using the local shape of the front door frame part of the car, which replaces the traditional method of CNC machining the contour surface of the fixture, greatly reducing the investment cost of the fixture, and is especially suitable for small-batch, multi-variety production mode.

[0016] The test results are more intuitive and reliable: the front door frame hinge reinforcement plate is directly fitted to the surface of the front door frame being reinforced and the holes are aligned. The test datum and the assembly datum are consistent, which more intuitively reflects the test results and makes it easier to quickly determine the product's qualification.

[0017] The fixture body is manufactured with high precision and rigidity: positioning holes and positioning clips formed by laser cutting are used to interlock and position the plates, ensuring accurate positioning before welding. At the same time, a frame structure is adopted and multiple reinforcing plates are added to meet the rigidity performance requirements of the fixture and ensure long-term stability.

[0018] Easy to operate and highly efficient in testing: The adjustable secondary positioning part allows for quick clamping and removal of the hinge reinforcement plate, making the testing process convenient and meeting the production cycle requirements. Attached Figure Description

[0019] Figure 1 This is an overall structural view of the present invention; Figure 2 This is a structural view of the inspection fixture body of the present invention; Figure 3 This is a structural view of the fixture profile and fixture body positioning part and the front door frame hinge reinforcement plate assembly and fixture body positioning part of the present invention installed on the fixture body; Figure 4 This is a schematic diagram of the application of the present invention (1); Figure 5 This is a schematic diagram of the application of the present invention (2).

[0020] in, 1. Inspection fixture body; 11. Side wall panel; 111. Left side wall panel; 112. Right side wall panel; 12. Bottom support plate; 121. First bottom support plate; 122. Second bottom support plate; 123. Third bottom support plate; 124. Fourth bottom support plate; 125. Fifth bottom support plate; 13. Triangular reinforcing plate; 14. Rectangular reinforcing plate; 2. Inspection fixture profiles, 21. Front door frame hinge reinforcement plate assembly mating profile with front door frame (i.e., first profile), 22. Front door frame hinge reinforcement plate assembly mating profile with outer wheel cover (i.e., second profile); 3. Fixture profile and fixture body positioning part (i.e., first positioning part), 31. Upper positioning part, 311. Upper positioning pin, 312. Upper positioning pin fixing bracket, 32. Lower positioning part, 321. Lower positioning pin, 322. Lower positioning pin fixing bracket; 4. Front door frame hinge reinforcement plate assembly and fixture body positioning part (i.e., second positioning part), 41. Secondary positioning part, 411. Secondary positioning pin, 412. Secondary positioning pin fixing bracket, 413. Fixing nut, 42. Main positioning part, 421. Main positioning pin, 422. Main positioning pin fixing bracket. Detailed Implementation

[0021] Please see Figures 1-3This embodiment provides a fixture for inspecting a front door frame hinge reinforcement plate of an automobile, including a fixture body 1, a fixture profile 2 disposed on the fixture body, a fixture profile and fixture body positioning part 3 (i.e., a first positioning part), and a front door frame hinge reinforcement plate assembly and fixture body positioning part 4 (i.e., a second positioning part). The fixture profile includes a front door frame hinge reinforcement plate assembly mating with the front door frame 21 (i.e., a first profile) and a front door frame hinge reinforcement plate assembly mating with the outer wheel cover 22 (i.e., a second profile). The fixture profile and fixture body positioning part includes an upper positioning part 31 and a lower positioning part 32. The front door frame hinge reinforcement plate assembly and fixture body positioning part includes a main positioning part 42 and a secondary positioning part 41. The various parts cooperate with each other to realize the inspection of the hinge reinforcement plate. This embodiment provides a detailed description of the positional relationships and cooperative use of the above-mentioned components, as follows: The fixture body 1 is the skeleton and support for the fixture's surface and positioning parts. It is welded together from side wall plates 11, bottom support plates 12, triangular reinforcing plates 13, and rectangular reinforcing plates 14. Specifically, there are two side wall plates 11, which are plate-shaped with several rectangular positioning holes. Their bottom surfaces are on the same horizontal plane, and one is placed vertically on each side, namely the left side wall plate 111 and the right side wall plate 112. There are five bottom support plates 12, namely the first bottom support plate 121, the second bottom support plate 122, the third bottom support plate 123, the fourth bottom support plate 124 and the fifth bottom support plate 125, which are arranged vertically from top to bottom. Each bottom support plate is provided with several rectangular positioning holes and positioning clips. The upper boundary shape is formed by laser cutting according to the outer contour surface of the front door frame parts to form the positioning shape section. The lower part is located on the same horizontal plane. A clip slot is reserved at the lower end of each bottom support plate. All clip slots are arranged on the same straight line. Each bottom support plate has a positioning clip at both the left and right ends, which cooperates with the rectangular positioning holes on the side wall plate 11 and is welded and fixed. It should be noted that, in order to ensure the stability of the inspection fixture body 1, a rectangular reinforcing plate 14 is welded to the lower end of the bottom support plate 12. The rectangular reinforcing plate is embedded in the slot of each bottom support plate. Eight triangular reinforcing plates 13 are welded at the corner where the side wall plate 11 connects to the bottom support plate 12. A rectangular clip is set at the midpoint of the two right-angled sides of each triangular reinforcing plate and is inserted into the corresponding positioning hole of the side wall plate and welded for fixation.

[0022] The inspection fixture surface 2 comprises two parts: a front door frame hinge reinforcement plate assembly mating surface 21 (first surface) and a front door frame mating surface 22 (second surface) of the front door frame hinge reinforcement plate assembly and the outer wheel cover. The front door frame hinge reinforcement plate assembly and the front door frame mating surface 21 are fixed and welded to the inspection fixture body positioning part 3 and the inspection fixture body 1 via the inspection fixture surface. The front door frame hinge reinforcement plate assembly and the outer wheel cover mating surface 22 are located at the lower part of the front door frame hinge reinforcement plate assembly and the front door frame mating surface 21. The two parts work together to realize the inspection function of the surface and boundary of the hinge reinforcement plate being tested. Specifically, the front door frame hinge reinforcement plate assembly and the front door frame mating surface 21 are formed by laser cutting of an existing commercial vehicle front door frame part to remove excess parts, leaving only a local area for assembling the front door hinge reinforcement plate. The existing positioning holes on this surface are used to fit onto the positioning pin of the fixture body, and the local outer contour of the front door frame part is fitted and positioned with the upper shape section of the bottom support plate 12. Then it is welded and fixed to the bottom support plate 12. This surface fits with all surfaces of the hinge reinforcement plate except for the lower boundary. The front door frame hinge reinforcement plate assembly and the outer wheel cover mating surface 22 are located below the front door frame hinge reinforcement plate assembly and the front door frame mating surface 21. It is formed by laser cutting the contour surface of the outer wheel cover and the front door frame hinge reinforcement plate assembly. A round hole (connection hole) is opened at the bend on both the left and right sides. It is connected to the left side panel 111 and the front door frame hinge reinforcement plate assembly and the front door frame mating surface 21 by screws and nuts. It fits against the lower boundary of the hinge reinforcement plate to check whether it is qualified.

[0023] The fixture profile and fixture body positioning part 3 (first positioning part) includes an upper positioning part 31 and a lower positioning part 32. The upper positioning part 31 is welded to the first bottom support plate 121, and the lower positioning part 32 is welded to the fifth bottom support plate 125. The two sets of positioning parts position the front door frame hinge reinforcement plate assembly and the front door frame mating profile 21 on the fixture body 1. Specifically, the upper positioning part 31 consists of an upper positioning pin 311 and an upper positioning pin fixing bracket 312. The upper positioning pin 311 is welded to the upper positioning pin fixing bracket 312, and the upper positioning pin fixing bracket 312 is fixed and welded to the first bottom support plate 121 through a locking hole and slot. The lower positioning part 32 consists of a lower positioning pin 321 and a lower positioning pin fixing bracket 322. The lower positioning pin 321 is welded to the lower positioning pin fixing bracket 322, and the lower positioning pin fixing bracket 322 is fixed and welded to the fifth bottom support plate 125 through a locking hole and slot. The fixture surface 21 is provided with positioning holes corresponding to the positioning pins mentioned above. Precise positioning is achieved by fitting the positioning holes into the positioning pins.

[0024] The front door frame hinge reinforcement plate assembly and fixture body positioning part 4 (second positioning part) includes a secondary positioning part 41 and a main positioning part 42. The secondary positioning part 41 is welded to the upper part of the left side panel 111, and the main positioning part 42 is welded to the third bottom support plate 123. The two sets of positioning parts position the hinge reinforcement plate under test on the fixture profile 2. Specifically, the secondary positioning part 41 consists of a secondary positioning pin 411 and a secondary positioning pin fixing bracket 412. The secondary positioning pin 411 is welded to the secondary positioning pin fixing bracket 412. The secondary positioning pin fixing bracket 412 has three vertically parallel oblong holes, which are fixed to the left side panel 111 by bolts and nuts, allowing for vertical position adjustment. The main positioning part 42 consists of a main positioning pin 421 and a main positioning pin fixing bracket 422. The main positioning pin 421 is welded to the main positioning pin fixing bracket 422, and the main positioning pin fixing bracket 422 is fixed and welded to the third bottom support plate 123 through a locking hole and slot.

[0025] like Figure 4-5 As shown, during the use of the front door frame hinge reinforcement plate inspection fixture of the present invention, the secondary positioning part 41 is first pulled upward to the limit. At this time, the fixing nut 413 is located at the lower limit boundary of the waist-shaped hole. The hinge reinforcement plate A is placed on the front door frame hinge reinforcement plate assembly and the front door frame mating surface 21, so that the main positioning hole and the secondary positioning hole of the hinge reinforcement plate pass through the main positioning pin 421 and the secondary positioning pin 411 of the front door frame hinge reinforcement plate assembly and the fixture body positioning part 4. The secondary positioning part 41 is moved downward so that the secondary positioning pin 411 passes through the secondary positioning hole of the reinforcement plate. At this time, the hinge reinforcement plate is fixed on the fixture. The fit between the hinge reinforcement plate and the fixture surface 2 and whether there is any deviation in the hole position are checked. Finally, the secondary positioning part 41 is pulled upward to the limit, and the hinge reinforcement plate A is removed, thus completing the inspection work of the hinge reinforcement plate A.

[0026] The above content discloses the automotive front door frame hinge reinforcement plate inspection fixture of the present invention. Its core advantages are: the inspection surface is formed by laser cutting of real parts instead of CNC machining, the inspection body is guaranteed by interlocking and welding of plates to ensure accuracy and rigidity, the overall structure is simple, the cost is low, and the inspection is intuitive and efficient. It can be widely promoted to the development of similar reinforcement plate inspection fixtures.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely for further illustrating the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A tooling for inspecting the hinge reinforcement plate of an automobile front door frame, characterized in that, The fixture body is composed of several steel plates that are positioned and welded together by positioning holes and positioning clips on each steel plate. The fixture body has a frame structure. The inspection fixture profile is set on the inspection fixture body. The inspection fixture profile is a partial part profile that is laser-cut and matches the front door frame hinge reinforcement plate assembly. It is used to fit the profile of the hinge reinforcement plate to be tested for inspection. A first positioning part is disposed between the fixture body and the fixture surface, for positioning and fixing the fixture surface on the fixture body; The second positioning part is disposed on the body of the fixture and is used to position and fix the hinge reinforcement plate to be inspected on the surface of the fixture.

2. The jig for reinforcing a hinge of a front door frame of an automobile according to claim 1, wherein The inspection fixture body includes, Two sidewalls are vertically disposed on the left and right sides of the inspection fixture body, and a plurality of first positioning holes are provided on each sidewall. Multiple bottom support plates are vertically arranged between two side wall plates. Each bottom support plate has a positioning clip at its left and right ends. The positioning clip is inserted into the first positioning hole and welded to fix it. The upper boundary shape of the bottom support plate is formed by laser cutting based on the outer contour surface of the front door frame part. Multiple reinforcing plates are disposed at the corner where the side wall plate connects to the bottom support plate and / or at the lower end of the bottom support plate to enhance the rigidity of the inspection fixture body.

3. The jig for reinforcing a front door hinge of an automobile as set forth in claim 2, wherein The first positioning hole is a rectangular positioning hole, the positioning clip is a rectangular clip adapted to the rectangular positioning hole, the bottom surfaces of the bottom support plates are located on the same horizontal plane, the lower end of each bottom support plate is reserved with a slot, and each slot is arranged on the same straight line.

4. The jig for reinforcing a front door hinge of an automobile as set forth in claim 2, wherein The multiple bottom support plates are arranged from top to bottom as a first bottom support plate, a second bottom support plate, a third bottom support plate, a fourth bottom support plate, and a fifth bottom support plate; the reinforcing plate includes eight triangular reinforcing plates and one rectangular reinforcing plate. The triangular reinforcing plates are located at the corners where the side wall plate and the bottom support plate connect, and the rectangular reinforcing plate is welded to the lower end of the bottom support plate.

5. The jig for reinforcing a hinge of a front door frame of an automobile according to claim 1, wherein The gauge profile includes, The first profile is formed by laser cutting the front door frame part to remove excess parts, leaving only a local area that mates with the hinge reinforcement plate. The first profile is positioned by the first positioning part and then welded and fixed to the fixture body. The first profile is used to fit with the profile of the hinge reinforcement plate except for the lower boundary. The second profile is disposed below the first profile. The second profile is formed by conformal laser cutting of the contour surface of the outer wheel cover that mates with the hinge reinforcement plate. The second profile is used to fit with the lower boundary profile of the hinge reinforcement plate.

6. A jig for reinforcing a front door hinge of an automobile as set forth in claim 5, characterized in that, The second profile has connecting holes at the bends on both the left and right sides. The second profile is fixedly connected to the side wall plate and the first profile by threaded fasteners that pass through the connecting holes.

7. The jig for reinforcing a front door hinge of an automobile as set forth in claim 1, wherein The first positioning part includes an upper positioning part and a lower positioning part. The upper positioning part is disposed on the upper part of the inspection fixture body, and includes an upper positioning pin and an upper positioning pin fixing bracket. The upper positioning pin is fixed on the upper positioning pin fixing bracket, and the upper positioning pin fixing bracket is fixedly connected to the inspection fixture body. The lower positioning part is disposed at the lower part of the inspection fixture body, and includes a lower positioning pin and a lower positioning pin fixing bracket. The lower positioning pin is fixed on the lower positioning pin fixing bracket, and the lower positioning pin fixing bracket is fixedly connected to the inspection fixture body. The fixture surface has positioning holes corresponding to the upper positioning pin and the lower positioning pin, and the fixture surface is positioned by fitting the corresponding positioning pins through the positioning holes.

8. The inspection fixture for the automotive front door frame hinge reinforcement plate according to claim 1, characterized in that, The second positioning unit includes a main positioning unit and a secondary positioning unit. The main positioning part is located in the middle of the fixture body and includes a main positioning pin and a main positioning pin fixing bracket. The main positioning pin is fixed on the main positioning pin fixing bracket and the main positioning pin fixing bracket is fixedly connected to the fixture body. The secondary positioning part is located at the upper left position of the inspection fixture body, and includes a secondary positioning pin and a secondary positioning pin fixing bracket. The secondary positioning pin is fixed on the secondary positioning pin fixing bracket, and the secondary positioning pin fixing bracket is fixedly connected to the inspection fixture body.

9. A fixture for inspecting a car front door frame hinge reinforcement plate according to claim 8, characterized in that, The secondary positioning pin fixing bracket has multiple oblong holes arranged vertically. The secondary positioning pin fixing bracket is adjustablely fixed to the inspection fixture body by threaded fasteners passing through the oblong holes. The position of the secondary positioning pin in the vertical direction is adjusted by the oblong holes.

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