A welding assembly inspection fixture for rear crossbeam of automobile floor

Abstract

The present invention discloses a welding assembly inspection fixture for a rear crossbeam of an automobile floor, comprising: a welding base, and an installation unit whose shape is adapted to the assembly, wherein the installation unit is provided with at least two positioning units, at least one detection unit, and at least one fixing unit; the positioning unit is used to position the assembly when the assembly is placed; the detection unit is used to detect the assembly, wherein a protective mechanism is provided on the detection unit used for hole position detection; and the fixing unit is used to clamp the assembly. By providing the protective mechanism, when the hole position is offset, once the position pin contacts the hole, a vertical and horizontal bidirectional force will be generated, at which time the protective mechanism can effectively stop the movement of the position pin, preventing the position pin from continuously generating a force with the hole, which may cause damage to the position pin.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection tools, and more particularly to an inspection tool for welding an automobile floor rear crossbeam. Background Art

[0002] A gauge is a special inspection device used to measure and evaluate the quality of the size, shape, and position characteristics of parts. The surface and periphery of the part can be inspected by visual inspection, a measuring table, or a caliper. The holes of different properties on the part and the connection positions between parts can also be visually inspected by inspection pins or visual inspection, so as to ensure the rapid judgment of the quality status of the parts during trial production and initial production. According to the inspection object, the gauge can be divided into stamping single product gauge, part assembly gauge, and combination gauge. The assembly gauge is mainly used to complete the measurement during the product processing process, and it is often necessary to inspect the surface and emphasize the continuity of the surface. Therefore, when the hole position is detected, it is usually detected by a spring pin. The operator manually presses the spring pin and confirms whether the hole position is appropriate by visual inspection and pressing feel. This can quickly complete the inspection of each hole, but manual pressing also has certain defects. When the hole position is not correct, manual pressing may cause the positioning pin to collide with the inner wall of the hole, or be squeezed and deformed by the inclined hole, thereby causing damage to the spring pin. Therefore, when the hole position is not correct, how to avoid the spring pin from being damaged by collision is the technical problem to be solved by the present invention. Summary of the invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0004] In order to at least partially solve the above problems, the present invention provides a vehicle floor rear cross beam welding assembly inspection fixture, comprising: a welding base, and an installation unit whose shape is adapted to the assembly, wherein the installation unit is provided with at least two positioning units, at least one detection unit, and at least one fixing unit;

[0005] The positioning unit is used to position the assembly when placing the assembly;

[0006] The detection unit is used to detect the assembly, wherein a protection mechanism is provided on the detection unit for hole position detection;

[0007] The fixing unit is used to clamp the assembly.

[0008] Preferably, the positioning unit includes a positioning surface, a positioning pin, a positioning hole, and a positioning block which are arranged on the mounting unit.

[0009] Preferably, the detection unit is composed of a plurality of mounting seats arranged on the welding base or the mounting unit, and detection equipment arranged on the mounting seats.

[0010] Preferably, the detection device includes a hole position detector, a surface detector, a molding surface template and a molding surface active block;

[0011] The hole position detector is used to detect whether the position of each hole on the assembly is accurate;

[0012] The surface detector is used to detect the size and shape of the assembly;

[0013] When the profile of the assembly cannot be inspected on the installation unit, it is inspected through the profile sample;

[0014] When the shape of the assembly is special and the hole position detector, surface detector, and mold surface template cannot detect it accurately, or when the assembly will be interfered when being taken and placed by the inspection fixture, the mold surface live block is used for detection.

[0015] Preferably, the hole position detector includes a detection pin, a marking pin, and a position pin.

[0016] Preferably, the position pin is composed of an insertion section plugged into a hole on the assembly, and a movable section movably connected to the mounting seat, and a protective mechanism is provided between the movable section and the insertion section.

[0017] Preferably, the protective mechanism is a first protective mechanism, the bottom of the movable section is provided with a first movable rod movably connected to the top of the insertion section, the top of the insertion section is provided with a first movable groove and a force storage piece, the force storage piece is provided at the opening of the first movable groove, and an elastic piece is provided between the force storage piece and the bottom of the movable section, the first movable rod penetrates the elastic piece and the force storage piece, and extends into the first movable groove, the first protective mechanism is sleeved on the outside of the movable section and the insertion section, and is movably connected to the movable section and the insertion section, and the inner wall of the first protective mechanism is provided with a card table movably connected to the force storage piece.

[0018] Preferably, the outer wall of the force storage member is composed of a lower abutment surface, a guide surface and an upper abutment surface, and the lower abutment surface, the guide surface and the upper abutment surface are all inclined surfaces. The lower abutment surface and the guide surface are in opposite directions to the upper abutment surface, and the top surface of the card table is a plane and the bottom surface is an inclined surface.

[0019] Preferably, the protective mechanism is a second protective mechanism, the bottom of the movable section is provided with a second movable rod movably connected to the top of the insertion section, the top of the insertion section is provided with a second movable groove and a first sealing member, the first sealing member is tubular and is arranged in the second movable groove, the bottom of the second movable rod is provided with a sealing plug, the sealing plug is located in the first sealing member and is movably connected to the first sealing member, the second protective mechanism is arranged at the top of the insertion section, the second movable rod passes through the second protective mechanism, and the sealing plug is selectively connected to the second protective mechanism.

[0020] Preferably, a second sealing member is provided in the second protection mechanism, and the second movable rod passes through the second sealing member and is movably connected to the second sealing member.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] After the assembly is fixed to the inspection fixture by the fixing unit, the inspection unit inspects the inspection surface (contour, surface, trimming, flanging, section, hole, etc.), wherein the hole position detector is used to detect the accuracy and position of the holes of the assembly. When the accuracy is detected by means of detection pins, marking pins and other equipment, the probability of equipment damage is relatively small because it requires careful, careful and slow operation by humans. However, the position pin usually adopts the spring pin in the prior art. During the inspection, because there is no need to consider the processing accuracy, as long as the position pin can pass through the hole, it means that the position is correct. Therefore, the conventional operation is that the operator presses the position pin downward, and releases it when it can pass through the hole. Under the action of the spring, the position pin is reset. The above is the detection method of the spring pin to the air in the prior art. Because most mechanical structures are now processed by CNC equipment, position offset is very rare. For this reason, operators press the spring pin quickly and forcefully when operating it to increase the efficiency of hole position detection. By setting up a protective mechanism, when the hole position is offset, once the position pin contacts the hole, vertical and horizontal bidirectional forces will be generated. At this time, the protective mechanism can effectively stop the movement of the position pin to prevent the position pin from continuously generating force with the hole, causing damage to the position pin.

[0023] The other advantages, objectives and features of the automobile floor rear cross beam welding assembly inspection fixture of the present invention will be partially reflected in the following description, and will also be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 The figure is a schematic structural diagram of the automobile floor rear crossbeam welding assembly inspection fixture of the present invention.

[0026] Figure 2 This is a structural schematic diagram of the automobile floor rear crossbeam welding assembly inspection fixture of the present invention (another model).

[0027] Figure 3 for Figure 2 Schematic diagram of a hole position detector in .

[0028] Figure 4 It is a cross-sectional view of the first protection mechanism in the present invention.

[0029] Figure 5 for Figure 4 Enlarged view of the middle force storage part.

[0030] Figure 6 It is a schematic diagram of the application of the position pin of the first protection mechanism in the present invention.

[0031] Figure 7 It is a cross-sectional view of the second protection mechanism in the present invention.

[0032] Figure 8 It is a schematic diagram of the application of the position pin of the second protection mechanism provided in the present invention.

[0033] In the figure: 1 welding base, 2 mounting unit, 3 hole position detector, 4 position pin, 41 insertion section, 42 movable section, 43 first movable rod, 44 force storage member, 441 lower abutment surface, 442 guide surface, 443 upper abutment surface, 45 elastic member, 46 second movable rod, 47 first sealing member, 48 sealing plug, 5 first protective mechanism, 51 card table, 6 second protective mechanism, 61 second sealing member. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0035] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0036] like Figure 1-Figure 8 As shown, the present invention provides a welding assembly inspection fixture for a rear cross beam of an automobile floor, comprising: a welding base 1, and an installation unit 2 whose shape is adapted to the assembly, wherein the installation unit 2 is provided with at least two positioning units, at least one detection unit, and at least one fixing unit;

[0037] The positioning unit is used to position the assembly when it is placed; the positioning unit includes a positioning surface, a positioning pin, a positioning hole, and a positioning block provided on the mounting unit 2. Usually, the assembly is fixed to the mounting unit 2 through the positioning hole and the insertable positioning pin, and generally a round pin or a diamond pin is used as the positioning pin. The positioning surface is usually the supporting and pressing surface of the assembly placed on the inspection fixture.

[0038] The detection unit is used to detect the assembly, wherein a protection mechanism is provided on the detection unit for hole position detection;

[0039] The fixing unit is used to clamp the assembly, and a clamp is usually used as the fixing unit. After the assembly is placed on the positioning reference surface of the gauge, the assembly is fitted to the positioning surface through the fixing unit.

[0040] The detection unit is composed of a plurality of mounting seats arranged on the welding base 1 or the mounting unit 2, and detection equipment arranged on the mounting seats. The detection equipment includes a hole position detector 3, a surface detector, a mold surface template and a mold surface active block;

[0041] The hole position detector 3 is used to detect whether the position of each hole on the assembly is accurate;

[0042] The surface detector is used to detect the size and shape of the assembly;

[0043] When the profile of the assembly cannot be detected on the mounting unit 2, it is detected by the profile sample;

[0044] When the assembly has a special shape and the hole position detector 3, surface detector, and mold surface template cannot detect accurately, or when the assembly is disturbed when being taken and placed by the inspection fixture, the mold surface live block is used for detection.

[0045] The hole position detector 3 includes a detection pin, a marking pin, and a position pin 4. The position pin 4 is composed of an insertion section 41 plugged into the hole on the assembly, and a movable section 42 movably connected to the mounting seat, and a protective mechanism is provided between the movable section 42 and the insertion section 41.

[0046] After the assembly is fixed to the inspection fixture by the fixing unit, the inspection unit inspects the inspection surface (contour, surface, trimming, flanging, section, hole, etc.), wherein the hole position detector 3 is used to detect the accuracy and position of the holes of the assembly. When the accuracy detection is performed by means of detection pins, marking pins and other equipment, the probability of equipment damage is relatively small because it requires careful, careful and slow operation by humans. However, the position pin 4 usually adopts the spring pin in the prior art. During the inspection, because there is no need to consider the processing accuracy, as long as the position pin 4 can pass through the hole, it means that the position is correct. Therefore, the conventional operation is that the operator presses the position pin 4 downward, and releases it when it can pass through the hole. Under the action of the spring, the position pin 4 is reset. The above is the detection method of the spring pin to the air in the prior art. Because most mechanical structures are now processed by CNC equipment, position offset rarely occurs. For this reason, operators press the spring pin quickly and forcefully when operating it to increase the efficiency of hole position detection. By setting a protective mechanism, when the hole position is offset, once the position pin 4 contacts the hole, vertical and horizontal bidirectional forces will be generated. At this time, the protective mechanism can effectively stop the movement of the position pin 4, preventing the position pin 4 from continuously generating force with the hole, causing damage to the position pin 4.

[0047] In this embodiment, we provide a first implementation of the protection mechanism, such as Figure 4-6 As shown, the protective mechanism is a first protective mechanism 5, which is arranged on the mounting seat on the welding base 1 or the mounting unit 2. The specific position can be adjusted according to the overall design of the gauge, as long as it is ensured that the first protective mechanism 5 will not move with the position pin 4. The bottom of the movable section 42 is provided with a first movable rod 43 movably connected to the top of the insertion section 41, and the top of the insertion section 41 is provided with a first movable groove and an elastic force storage member 44, as shown in FIG. Figure 4 As shown, the cross section of the force storage member 44 is as follows Figure 4 The T-shaped cross section shown in the figure, the downwardly extending portion of the force storage member 44 is arranged in the opening of the first movable groove, and can be threadedly connected with the first movable groove, and an elastic member 45 is arranged between the force storage member 44 and the bottom of the movable section 42, and the first movable rod 43 penetrates the elastic member 45 and the force storage member 44 and extends into the first movable groove. The first movable rod 43 is an inverted T-shaped rod, as shown in FIG. Figure 4As shown, the bottom diameter of the first movable rod 43 is larger than the rod diameter and is adapted to the inner diameter of the first movable groove. The first movable rod 43 can slide up and down in the first movable groove and can be blocked by the portion of the force storage member 44 located in the first movable groove. When the position pin 4 is reset, the first movable rod 43 will not be separated from the insertion section 41. The first protective mechanism 5 is sleeved on the outside of the movable section 42 and the insertion section 41 and is movably connected to the movable section 42 and the insertion section 41. The first protective mechanism 5 can generally be a cylindrical structure with an open top. The outer wall of the first protective mechanism 5 is connected to the mounting seat (or the mounting seat is directly set The first protective mechanism 5 may be used), the top of the insertion section 41, the force storage member 44, the elastic member 45, and the bottom of the movable section 42 are all located inside the first protective mechanism 5, the maximum outer diameter of the force storage member 44 and the outer diameter of the movable section 42 are both adapted to the inner diameter of the first protective mechanism 5, the outer diameter of the insertion section 41 is smaller than the inner diameter of the first protective mechanism 5, so that under the action of the force storage member 44, the insertion section 41 will not fall out of the first protective mechanism 5, and the inner wall of the first protective mechanism 5 is provided with a clamping table 51 movably connected to the force storage member 44. The outer wall of the force storage member 44 is composed of a lower abutting surface 441, a guide surface 442, and an upper abutting surface 443, the lower abutting surface 441, the guide surface 442, and the upper abutting surface 443 are all inclined surfaces, the lower abutting surface 441 and the guide surface 442 are in opposite directions to the upper abutting surface 443, the top surface of the clamping table 51 is a plane, and the bottom surface is an inclined surface, such as Figure 5 The initial positions of the position pin 4 and the first protection mechanism 5 are as shown in Figure 6 As shown in A, the force storage member 44 is located above the card table 51, the bottom of the movable section 42 is located inside the first protective mechanism 5, the bottom of the first movable rod 43 abuts against the part of the force storage member 44 located in the first movable groove, and the elastic member 45 is in a non-stressed state.

[0048] Compared with the existing spring pin operation, the position pin 4 in the present invention is quickly pressed downward by the operator, and first the movable section 42 will move downward relative to the first protective mechanism 5, and push the force storage member 44 downward through the elastic member 45, and the force storage member 44 drives the insertion section 41 to move downward until the lower abutting surface 441 of the force storage member 44 abuts against the top surface of the card table 51, and then the first movable rod 43 will continue to move downward in the first movable groove driven by the movable section 42, the elastic member 45 will be further compressed, and the card table 51 will also move from the lower abutting surface 441 to the connection with the guide surface 442, until the bottom of the first movable rod 43 abuts against the inner bottom of the first movable groove, as shown in FIG. Figure 6 As shown in A to B.

[0049] Continue to press the movable section 42 downward, the first movable rod 43 will assist the insertion section 41 to move downward, and at the same time, because the slope of the guide surface 442 is smaller than the slope of the lower abutting surface (the outer diameter of the connection between the lower abutting surface 441 and the guide surface 442 is larger than the outer diameter of the bottom of the lower abutting surface 441 and smaller than the outer diameter of the top of the guide surface 442, as shown in FIG. Figure 5 As shown in FIG. 5 , under the dual action of the thrust of the first movable rod 43 and the elastic force of the elastic member 45, the elastic force storage member 44 will deform and move to the bottom of the card table 51, as shown in FIG. Figure 6 Finally, under the action of the elastic member 45, the insertion section 41 quickly pops out downward, the bottom surface of the force storage member 44 abuts against the inner bottom surface of the first protection mechanism 5, and the first movable rod 43 abuts against the bottom surface of the force storage member 44 located in the first movable groove, as shown in FIG. Figure 6 As shown in D.

[0050] With the above structural design, the operator only needs to press down a short stroke to allow the insertion section 41 to pop out quickly and insert into the hole. If the position of the through hole is incorrect, since the insertion section 41 is only subjected to the force of the elastic member 45, it is easy to be stopped by the inner wall of the hole, thereby avoiding damage to the hole and the position pin 4.

[0051] After the detection, the position pin 4 can be quickly reset by just lifting the movable section 42 upwards. The inclined design of the bottom surface of the card table 51 can facilitate the passage of the force storage member 44. Because a spring pin is usually used as the position pin 4, the spring between the movable section 42 and the mounting seat can help the position pin 4 to automatically reset. As a result, the position pin 4 of the present invention has a shorter pressing stroke and a faster jack detection speed. At the same time, when the hole position is incorrect, damage to the hole and the position pin 4 can also be avoided.

[0052] In the previous embodiment, we provide an implementation of a protection mechanism. In the first implementation, a fixed protection mechanism is used. In this embodiment, we provide an implementation of a non-fixed protection mechanism, such as Figure 7 As shown, the protection mechanism is a second protection mechanism 6, the bottom of the movable section 42 is provided with a second movable rod 46 movably connected to the top of the insertion section 41, the top of the insertion section 41 is provided with a second movable groove and a first sealing member 47, and the first sealing member 47 is tubular, as shown in FIG. Figure 7As shown, and arranged in the second movable groove, a sealing plug 48 is arranged at the bottom of the second movable rod 46, and the sealing plug 48 is located in the first sealing member 47 and is movably connected to the first sealing member 47, so that the sealing plug 48 can move up and down in the first sealing member 47, and the air in the first sealing member 47 is compressed by the up and down movement of the sealing plug 48 in the first sealing member 47, so that when the insertion section 41 collides with the hole, it can play a buffering role to avoid serious damage to the hole and the insertion section 41. The second protective mechanism 6 is arranged at the top of the insertion section 41, and the second movable rod 46 passes through the second protective mechanism 6, and the sealing plug 48 is selectively connected to the second protective mechanism 6. A second sealing member 61 is arranged in the second protective mechanism 6, and the second movable rod 46 passes through the second sealing member 61 and is movably connected to the second sealing member 61. The cross-section of the second protective mechanism 6 is H-shaped, as shown Figure 7 As shown, the bottom of the second protection mechanism 6 is threadedly connected to the top of the insertion section 41, and a cover is threadedly connected to the top of the second protection mechanism 6 to prevent the second sealing member 61 from falling out of the second protection mechanism 6. The sealing plug 48 is tapered near the connection with the second movable rod 46, and the inner wall shape of the second sealing member 61 is adapted to the tapered shape of the sealing plug 48, as shown in FIG. Figure 7 As shown, when the positioning pin 4 is reset, the insertion section 41 can be driven to reset.

[0053] Different from the quick ejection and automatic stop by the hole in the first embodiment, the present embodiment uses compressed air to achieve a buffering effect, reducing the damage to the position pin 4 and the hole caused by the collision. Compared with the first embodiment, although it cannot achieve collision stop, it has the advantages of simple structure, lower production cost and simpler production process.

[0054] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A welding assembly inspection fixture for rear crossbeam of automobile floor, characterized in that: include: A welding base (1), and a mounting unit (2) having a shape adapted to the assembly, wherein the mounting unit (2) is provided with at least two positioning units, at least one detection unit, and at least one fixing unit; The positioning unit is used to position the assembly when placing the assembly; The detection unit is used to detect the assembly, wherein a protection mechanism is provided on the detection unit for hole position detection; The fixing unit is used to clamp the assembly; The detection unit is composed of a plurality of mounting seats arranged on the welding base (1) or the mounting unit (2), and detection equipment arranged on the mounting seats; The detection device comprises a hole position detector (3), a surface detector, a mold surface template and a mold surface active block; The hole position detector (3) is used to detect whether the position of each hole on the assembly is accurate; The surface detector is used to detect the size and shape of the assembly; When the profile of the assembly cannot be detected on the mounting unit (2), detection is performed using a profile sample; When the shape of the assembly is special and the hole position detector (3), surface detector, and mold surface template cannot accurately detect it, or when the assembly is disturbed when being taken and placed by the inspection fixture, the mold surface live block is used for detection; The hole position detector (3) comprises a detection pin, a marking pin and a position pin (4); The position pin (4) is composed of an insertion section (41) plugged into a hole on the assembly, and a movable section (42) movably connected to the mounting seat, and a protective mechanism is provided between the movable section (42) and the insertion section (41); The protective mechanism is a first protective mechanism (5), the bottom of the movable section (42) is provided with a first movable rod (43) movably connected to the top of the insertion section (41), the top of the insertion section (41) is provided with a first movable groove and a force storage member (44), the force storage member (44) is provided at the opening of the first movable groove, and an elastic member (45) is provided between the force storage member (44) and the bottom of the movable section (42), the first movable rod (43) penetrates the elastic member (45) and the force storage member (44), and extends into the first movable groove, the first protective mechanism (5) is sleeved on the outside of the movable section (42) and the insertion section (41), and is movably connected to the movable section (42) and the insertion section (41), and the inner wall of the first protective mechanism (5) is provided with a clamping table (51) movably connected to the force storage member (44); The outer wall of the force storage member (44) is composed of a lower abutting surface (441), a guiding surface (442) and an upper abutting surface (443); the lower abutting surface (441), the guiding surface (442) and the upper abutting surface (443) are all inclined surfaces; the lower abutting surface (441) and the guiding surface (442) are oriented in opposite directions to the upper abutting surface (443); the top surface of the card table (51) is a plane, and the bottom surface is an inclined surface.

2. The automobile floor rear cross beam welding assembly inspection fixture according to claim 1, characterized in that: The positioning unit comprises a positioning surface, a positioning pin, a positioning hole and a positioning block which are arranged on the mounting unit (2).

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