Front subframe straightening detection tool

Abstract

A front subframe straightening detection tool, comprising a second workbench (2), the second workbench (2) is provided with a positioning mechanism, a straightening mechanism, a detection mechanism and a group of frame foundation support columns (20), the positioning mechanism of the second workbench (2) comprises a pair of groove positioning blocks (21), a group of side positioning parts (22) and a group of pressing cylinders (23); The advantages are: automatic clamping is adopted, the operation is simple, and the qualified blank after straightening can be ensured, the required excess amount of machining is met, the product qualified rate and machining efficiency are greatly improved, and the product production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle frame calibration and testing equipment, and specifically to a front subframe calibration and testing fixture. Background Technology

[0002] Currently, lightweight chassis is an inevitable choice for the country's development of new energy vehicles for energy conservation and emission reduction. More and more automakers are choosing Al-Si alloy (aluminum-silicon alloy) casting to manufacture subframes. At present, Al-Si alloy subframes are mainly of two types: split type and integral type. Whether it is a split type or an integral type casting, it is extremely easy to deform during the casting, placement and subsequent heat treatment process.

[0003] During product processing, issues such as misaligned holes, milling scratches, and lack of a smooth finish are common, or the product may be impossible to clamp and position. Ultimately, these problems stem from product deformation. Deformation is the biggest technical challenge in the industry; only by solving this problem can the product yield be significantly improved, the processing flow be kept smooth, and costs saved.

[0004] Existing products use process bosses for positioning, and the subframe frame, center bushing holes, and four corner lugs and steering knuckles are aligned by manually clamping with pressure plates. This existing technology, which uses manual clamping, is time-consuming, difficult to operate, and, due to limited space, cannot accurately align certain parts of the product. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned shortcomings by providing a front subframe calibration and inspection fixture.

[0006] This invention includes a second workbench, on which a positioning mechanism, a calibration mechanism, a testing mechanism, and a set of chassis foundation support columns are provided. The positioning mechanism of the second worktable includes a pair of grooved positioning blocks, a set of side positioning parts, and a set of clamping cylinders. The top of the recessed positioning block has a frame positioning groove, and one side of the side positioning part has a frame positioning groove. A pair of recessed positioning blocks and a set of side positioning parts are respectively installed on the second worktable. A set of clamping cylinders are respectively installed on the second worktable, and the frame is clamped from above by the clamping cylinders. The alignment mechanism of the second workbench includes a pair of longitudinal alignment hydraulic cylinders for the lugs, a pair of longitudinal alignment hydraulic cylinders for the ram's horns, and a pair of transverse alignment hydraulic cylinders for the ram's horns. The piston rod end of the lug longitudinal alignment hydraulic cylinder is provided with a clamping part. A pair of lug longitudinal alignment hydraulic cylinders are symmetrically distributed and installed on the second worktable. The piston rod end of the yoke longitudinal alignment hydraulic cylinder is provided with an adjusting hook. A pair of yoke longitudinal alignment hydraulic cylinders are mirror-distributed and installed on the second worktable. The piston rod end of the yoke lateral alignment hydraulic cylinder is provided with a push-pull adjustment mechanism for laterally pulling the yoke of the frame. The yoke lateral alignment hydraulic cylinder is installed on the second worktable.

[0007] The side positioning part consists of a slide groove and a locking slider. The locking slider has a frame positioning groove on one side. The locking slider is slidably installed in the slide groove. One side positioning part is located below the steering knuckle lateral adjustment hydraulic cylinder, and the other side positioning parts are located on one side of the groove positioning block.

[0008] The clamping cylinder is a lever cylinder, and a set of clamping cylinders consists of three cylinders.

[0009] The clamping part consists of a U-shaped base and a pin. The U-shaped base has a through pin hole. When the frame lugs are placed inside the U-shaped base, the pin is inserted into the pin hole of the U-shaped base so that the pin is above the frame lugs.

[0010] The piston rod end of the ram horn longitudinal straightening hydraulic cylinder is provided with a lug seat, and the bottom of the adjusting hook is movably mounted on the lug seat through a pin.

[0011] The push-pull adjustment mechanism includes a pair of drive rods and a pair of lateral hooks. The piston rod end of the lateral steering hydraulic cylinder is provided with a U-shaped connecting part. The lateral steering hydraulic cylinder is mounted on the second worktable via an adjustment bracket. The pair of drive rods are mirror-distributed. The middle part of the drive rod is mounted on the adjustment bracket via a rotating shaft. One end of the drive rod is movably mounted in the U-shaped connecting part via a pin. The tail of the lateral hook is movably mounted on the other end of the drive rod via a pin. The lateral steering hydraulic cylinder drives the corresponding lateral hook through the pair of drive rods to correct the lateral deformation of the frame's steering angle.

[0012] The detection mechanism of the second workbench includes a pair of ear piece detection rods and a pair of ram's horn detection rods. The ear piece detection rods are mounted on the second workbench via detection support blocks and are movably mounted on the detection support blocks via pins. The detection support blocks are provided with protrusions to keep the ear piece detection rods horizontal. The ram's horn detection rods are mounted on the second workbench via detection supports. Both the ram's horn detection rods and the detection supports are L-shaped. The ram's horn detection rods are movably mounted on the detection supports via pins, and the detection end of the ram's horn detection rods has a height deviation detection groove.

[0013] The advantages of this invention are: it adopts automatic clamping with a cylinder, which is simple to operate and can ensure that the blanks after correction are qualified, meet the processing requirements, greatly improve the product qualification rate and machining efficiency, and reduce the product manufacturing cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the hidden detection mechanism of the second workbench of the present invention.

[0015] Figure 2 This is a front structural diagram of the testing mechanism of the present invention when calibrating the vehicle frame.

[0016] Figure 3 This is a schematic diagram of the push-pull adjustment mechanism of the present invention.

[0017] Figure 4 This is a schematic diagram of the back structure of the testing mechanism of the present invention when calibrating the frame.

[0018] Figure 5 This is a side view of the detection mechanism on the second workbench of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of the embodiments of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, if terms such as "first" or "second" appear in the description of this invention, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0024] As shown in the attached drawings, the present invention includes a second workbench 2, on which a positioning mechanism, a calibration mechanism, a testing mechanism, and a set of frame foundation support columns 20 are provided. The positioning mechanism of the second worktable 2 includes a pair of groove positioning blocks 21, a set of side positioning parts 22, and a set of clamping cylinders 23. The top of the recessed positioning block 21 has a frame positioning groove, and the side positioning part 22 has a frame positioning groove on one side. A pair of recessed positioning blocks 21 and a set of side positioning parts 22 are respectively installed on the second worktable 2. A set of clamping cylinders 23 are respectively installed on the second worktable 2. The frame is clamped from above by the clamping cylinders 23. The alignment mechanism of the second workbench 2 includes a pair of longitudinal alignment hydraulic cylinders 24 for the lugs, a pair of longitudinal alignment hydraulic cylinders 25 for the ram's horns, and a transverse alignment hydraulic cylinder 26 for the ram's horns. The piston rod end of the lug longitudinal alignment hydraulic cylinder 24 is provided with a clamping part 27. A pair of lug longitudinal alignment hydraulic cylinders 24 are symmetrically distributed and installed on the second worktable 2. The piston rod end of the yoke longitudinal alignment hydraulic cylinder 25 is provided with an adjusting hook 28. A pair of yoke longitudinal alignment hydraulic cylinders 25 are mirror-distributed and installed on the second worktable 2. The piston rod end of the yoke lateral alignment hydraulic cylinder 26 is provided with a push-pull type adjusting mechanism 29 for laterally pulling the yoke of the frame. The yoke lateral alignment hydraulic cylinder 26 is installed on the second worktable 2.

[0025] The side positioning part 22 is composed of a slide groove and a locking slider. The locking slider has a frame positioning groove on one side and the locking slider is slidably installed in the slide groove. One side positioning part 22 is located below the steering knuckle lateral straightening hydraulic cylinder 26, and the other side positioning parts 22 are located on one side of the groove positioning block 21.

[0026] The clamping cylinder 23 is a lever cylinder, and there are three clamping cylinders 23 in a set.

[0027] The clamping part 27 consists of a U-shaped base and a pin. The U-shaped base has a through pin hole. When the frame lugs are placed inside the U-shaped base, the pin is inserted into the pin hole of the U-shaped base so that the pin is positioned above the frame lugs.

[0028] The piston rod end of the ram horn longitudinal straightening hydraulic cylinder 25 is provided with a lug seat, and the bottom of the adjusting hook 28 is movably mounted on the lug seat through a pin.

[0029] The push-pull adjustment mechanism 29 includes a pair of transmission rods 31 and a pair of lateral hooks 32. The piston rod end of the lateral steering hydraulic cylinder 26 is provided with a U-shaped connecting part. The lateral steering hydraulic cylinder 26 is mounted on the second worktable 2 via the adjustment bracket 30. The pair of transmission rods 31 are mirror-distributed. The middle part of the transmission rod 31 is mounted on the adjustment bracket 30 via a rotating shaft. One end of the transmission rod 31 is movably mounted in the U-shaped connecting part via a pin. The tail of the lateral hook 32 is movably mounted on the other end of the transmission rod 31 via a pin. The lateral steering hydraulic cylinder 26 drives the corresponding lateral hook 32 through the pair of transmission rods 31 to correct the lateral deformation of the frame's steering angle.

[0030] The detection mechanism of the second workbench 2 includes a pair of ear piece detection rods 33 and a pair of ram's horn detection rods 34. The ear piece detection rods 33 are mounted on the second workbench 2 via detection support blocks 35. The ear piece detection rods 33 are movably mounted on the detection support blocks 35 via pins. The detection support blocks 35 are provided with protrusions for keeping the ear piece detection rods 33 horizontal. The ram's horn detection rods 34 are mounted on the second workbench 2 via detection supports 36. Both the ram's horn detection rods 34 and the detection supports 36 are L-shaped. The ram's horn detection rods 34 are movably mounted on the detection supports 36 via pins. The detection end of the ram's horn detection rods 34 has a height deviation detection groove 37. Example

[0031] The positioning mechanism on the second workbench 2 positions the subframe 100. The worker places the subframe 100 on a set of frame base support columns 20. The middle part of the subframe 100 is located in the frame positioning groove of a pair of groove positioning blocks 21. The side of the subframe 100 is positioned by adjusting the locking slider of a set of side positioning parts 22. The subframe 100 is pressed and fixed from above by a set of pressing cylinders 23.

[0032] The second-order calibration is performed on the second workbench 2. Step 1: Using a pair of longitudinally oriented hydraulic cylinders 24, the lugs of the subframe 100 are moved up and down through the clamping part 27 to push them upward and deform. Through the pin in the U-shaped base, the lugs of the subframe 100 are pulled downward and deformed.

[0033] Step 2: Using a pair of longitudinally aligning hydraulic cylinders 25, the adjusting hook 28 is moved up and down to correct the vertical deformation of the pair of steering knuckles on the subframe 100. While the adjusting hook 28 is being aligned, the transverse pull hook 32 is rotated backward to make it horizontal with the transmission rod 31, thus creating space for alignment. After the adjusting hook 28 is aligned, it is rotated backward to create more space for alignment.

[0034] Step 3: Rotate the transverse hook 32 so that the transverse hook 32 and the transmission rod 31 form a 90° angle. The transverse hook 32 is locked on the steering knuckle of the correction subframe 100. The steering knuckle lateral correction hydraulic cylinder 26 drives the corresponding transverse hook 32 to move back and forth through a pair of transmission rods 31 to correct the deformation of the steering knuckle of the subframe 100 in the front and back directions.

[0035] The test was performed on the second workbench 2. The deviation in height between the lugs of the subframe 100 and the lug testing rod 33 is detected by a plug gauge, and the deviation is within 1mm.

[0036] The front-to-back deviation between the end of the steering knuckle detection rod 34 and the steering knuckle of the subframe 100 is detected by the plug gauge, and the vertical deviation between the height deviation detection groove 37 and the steering knuckle of the subframe 100 is detected by the plug gauge.

Claims

1. A front subframe alignment and inspection fixture, comprising a second workbench (2), wherein the second workbench (2) is provided with a positioning mechanism, a alignment mechanism, an inspection mechanism, and a set of frame base support columns (20), characterized in that, The positioning mechanism of the second workbench (2) includes a pair of groove positioning blocks (21), a set of side positioning parts (22), and a set of clamping cylinders (23). The top of the groove positioning block (21) has a front subframe positioning groove, and the side positioning part (22) has a front subframe positioning groove on one side. A pair of groove positioning blocks (21) and a set of side positioning parts (22) are respectively installed on the second worktable (2). A set of clamping cylinders (23) are respectively installed on the second worktable (2). The front subframe is clamped from above by the clamping cylinders (23). The alignment mechanism of the second workbench (2) includes a pair of longitudinal alignment hydraulic cylinders (24) for the lugs, a pair of longitudinal alignment hydraulic cylinders (25) for the ram's horns, and a transverse alignment hydraulic cylinder (26) for the ram's horns. The piston rod end of the lug longitudinal alignment hydraulic cylinder (24) is provided with a clamping part (27). A pair of lug longitudinal alignment hydraulic cylinders (24) are symmetrically distributed and installed on the second worktable (2). The piston rod end of the horn longitudinal alignment hydraulic cylinder (25) is provided with an adjusting hook (28). A pair of horn longitudinal alignment hydraulic cylinders (25) are mirror-distributed and installed on the second worktable (2). The piston rod end of the horn transverse alignment hydraulic cylinder (26) is provided with a push-pull type adjusting mechanism (29) for laterally pulling the horn of the front subframe. The horn transverse alignment hydraulic cylinder (26) is installed on the second worktable (2). The side positioning part (22) consists of a slide groove and a locking slider. The locking slider has a front subframe positioning groove on one side and is slidably installed in the slide groove. The clamping part (27) consists of a U-shaped base and a pin. The push-pull adjustment mechanism (29) includes a pair of drive rods (31) and a pair of transverse hooks (32). The lateral steering knuckle hydraulic cylinder (26) drives the corresponding lateral hook (32) through a pair of transmission rods (31) to correct the lateral deformation of the front subframe steering knuckle. The testing mechanism of the second workbench (2) includes a pair of ear piece testing rods (33) and a pair of ram's horn testing rods (34). The ram's horn detection rod (34) has a height deviation detection groove (37) at its detection end; The steps are as follows: A1. The positioning mechanism on the second workbench (2) positions the front subframe (100). The staff places the front subframe (100) on a set of frame base support columns (20). The middle part of the front subframe (100) is located in the front subframe positioning groove of a pair of groove positioning blocks (21). The side of the front subframe (100) is positioned by adjusting the locking slider of a set of side positioning parts (22). The front subframe (100) is pressed and fixed from above by a set of pressing cylinders (23). A2. Perform the second-order calibration on the second workbench (2); By using a pair of longitudinally oriented hydraulic cylinders (24) to move up and down, the clamping part (27) pushes the ear of the front subframe (100) upward to deform, and the pin in the U-shaped base pulls the ear of the front subframe (100) downward to deform. Using a pair of longitudinally calibrating hydraulic cylinders (25) to drive the adjusting hook (28) to move up and down, the deformation of the pair of calipers of the front subframe (100) in the vertical direction is corrected. When the adjusting hook (28) is calibrated, the transverse pull hook (32) is rotated backward to make the transverse pull hook (32) horizontal with the transmission rod (31) to make room for calibration. After the adjusting hook (28) is calibrated, the adjusting hook (28) is rotated backward to make room for calibration. Rotate the lateral hook (32) so that the lateral hook (32) and the transmission rod (31) form a 90° angle. The lateral hook (32) is locked on the steering knuckle of the front subframe (100). The steering knuckle lateral correction hydraulic cylinder (26) drives the corresponding lateral hook (32) to move back and forth through a pair of transmission rods (31) to correct the deformation of the steering knuckle of the front subframe (100) in the front and back directions. A3. Perform the test on the second workbench (2); The deviation in height between the lugs of the front subframe (100) and the lug testing rod (33) is detected by plug gauge, and the deviation is within 1mm. The front-to-back deviation between the end of the steering knuckle detection rod (34) and the steering knuckle of the front subframe (100) is detected by the plug gauge, and the vertical deviation between the height deviation detection groove (37) and the steering knuckle of the front subframe (100) is detected by the plug gauge.

2. The front subframe calibration and inspection fixture according to claim 1, characterized in that, One of the side positioning parts (22) is located below the horn lateral straightening hydraulic cylinder (26), and the other side positioning parts (22) are located on one side of the groove positioning block (21).

3. The front subframe calibration and inspection fixture according to claim 1, characterized in that, The clamping cylinder (23) is a lever cylinder, and the number of clamping cylinders (23) in a set is three.

4. The front subframe calibration and inspection fixture according to claim 1, characterized in that, The U-shaped base has a through pin hole. When the lug of the front subframe is placed into the U-shaped base, the pin is inserted into the pin hole of the U-shaped base so that the pin is above the lug of the front subframe.

5. The front subframe calibration and inspection fixture according to claim 1, characterized in that, The piston rod end of the ram horn longitudinal straightening hydraulic cylinder (25) is provided with a lug seat, and the bottom of the adjusting hook (28) is movably mounted on the lug seat through a pin.

6. The front subframe calibration and inspection fixture according to claim 1, characterized in that, The piston rod end of the horn-shaped hydraulic cylinder (26) is provided with a U-shaped connecting part. The horn-shaped hydraulic cylinder (26) is mounted on the second worktable (2) through the adjusting bracket (30). A pair of transmission rods (31) are distributed in a mirror image. The middle part of the transmission rod (31) is mounted on the adjusting bracket (30) through a rotating shaft. One end of the transmission rod (31) is movably mounted in the U-shaped connecting part through a pin. The tail of the transverse hook (32) is movably mounted on the other end of the transmission rod (31) through a pin.

7. The front subframe calibration and inspection fixture according to claim 1, characterized in that, The ear piece detection rod (33) is mounted on the second workbench (2) via the detection support block (35). The ear piece detection rod (33) is movably mounted on the detection support block (35) via a pin. The detection support block (35) is provided with a protrusion for keeping the ear piece detection rod (33) horizontal. The ram's horn detection rod (34) is mounted on the second workbench (2) via the detection support (36). Both the ram's horn detection rod (34) and the detection support (36) are L-shaped. The ram's horn detection rod (34) is movably mounted on the detection support (36) via a pin.

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