Correcting and detecting device for automobile power cross beam and detecting and correcting method of correcting and detecting device

Abstract

The invention discloses a correction detection device of an automobile power cross beam and a detection correction method thereof, and belongs to the technical field of power cross beam correction devices.The correction detection device is characterized in that a rear positioning mechanism, a middle limiting mechanism and a movable correction mechanism are sequentially installed on a bottom plate, and the rear positioning mechanism comprises a rear positioning vertical plate and a rear limiting plate; the rear positioning vertical plate is vertically and fixedly mounted on the bottom plate, and a positioning hole corresponding to the power cross beam is formed in the rear positioning vertical plate; the middle limiting mechanism comprises a middle limiting plate and inner limiting blocks, the middle limiting plate is vertically and fixedly installed on the bottom plate, the middle limiting plate is provided with a positioning groove with an opening in the upper end, the two inner limiting blocks are installed in the positioning groove of the middle limiting plate, and the two inner limiting blocks are located between the power cross beam and the inner groove wall of the positioning groove of the middle limiting plate. Compared with the prior art, the device has the characteristic of detecting and correcting the power cross beam.

Description

Technical Field

[0001] The present invention relates to the technical field of power crossbeam correction devices, in particular to a correction detection device for an automotive power crossbeam and its detection and correction method. Background Art

[0002] As a crucial component in the automotive chassis structure, the power crossbeam bears various complex stresses and loads during vehicle operation. Therefore, extremely strict requirements are imposed on its manufacturing precision and quality. However, due to the unique deep cavity and thin wall design features of the power crossbeam forgings, after undergoing forging and subsequent heat treatment processes, they often face a technical problem: the end faces of some forgings will exhibit a certain degree of torsional deformation.

[0003] The occurrence of this torsional phenomenon is mainly due to the plastic deformation of the material under high temperature and high pressure and the uneven thermal expansion and contraction during the heat treatment process, resulting in an imbalance in the internal stress distribution, which in turn causes torsional distortion in shape. Once the end face of the forging is distorted, serious problems will be encountered during the subsequent machining process, especially when machining threaded holes on the end face. Due to the distortion, the threaded holes that should be precisely located at the symmetric center of the part end face in the original design will be found to be significantly deviated in position after machining. This not only affects the assembly precision and functionality of the part but also directly causes the product to fail to meet the established quality standards and can ultimately only be treated as scrap, bringing unnecessary economic losses and resource waste to the enterprise. Summary of the Invention

[0004] The purpose of the present invention is to provide a correction detection device for an automotive power crossbeam and its detection and correction method to achieve the purpose of detecting and correcting the power crossbeam in view of the above deficiencies in the prior art.

[0005] A correction and detection device for an automotive power crossbeam provided by the present invention is characterized in that it includes a bottom plate, a rear positioning mechanism, an intermediate limiting mechanism, and a movable correction mechanism. The rear positioning mechanism, the intermediate limiting mechanism, and the movable correction mechanism are sequentially installed on the bottom plate. The rear positioning mechanism includes a rear positioning vertical plate and a rear limiting plate. The rear positioning vertical plate is vertically and fixedly installed on the bottom plate, and positioning holes corresponding to the power crossbeam are provided on the rear positioning vertical plate. The intermediate limiting mechanism includes an intermediate limiting plate and inner limiting blocks. The intermediate limiting plate is vertically and fixedly installed on the bottom plate. The intermediate limiting plate is provided with a positioning groove with an open upper end. Two inner limiting blocks are installed in the positioning groove of the intermediate limiting plate, and the two inner limiting blocks are respectively located between the power crossbeam and the inner groove wall of the positioning groove of the intermediate limiting plate. The movable correction mechanism includes a movable plate, a fixed guide plate, a movable guide plate, rollers, needle rollers, springs, spring limiting blocks, and a correction plate. A groove is provided on the bottom plate. Spring limiting blocks are respectively installed on the two end walls of the groove. A movable plate is installed in the groove. The two ends of the movable plate are connected to the spring limiting blocks through springs. A plurality of needle rollers evenly distributed linearly are installed between the lower end of the movable plate and the bottom wall of the groove. The lower end of the correction plate is arc-shaped and is placed on the upper end surface of the movable plate. A correction hole is provided at the upper end of the correction plate, and horizontal reference lines are engraved on both end surfaces. A cylinder is installed on the bottom wall. Flat pads are respectively placed in the positioning holes of the rear positioning vertical plate and the correction holes of the correction plate.

[0006] Further, the rear limiting plate is fixedly installed at the positioning hole of the rear positioning vertical plate through bolts.

[0007] Further, a fixed guide plate and a movable guide plate are installed on the bottom plate. The fixed guide plate is connected to the bottom plate, and the movable guide plate is detachably connected to the bottom plate through bolts. The fixed guide plate and the movable guide plate are respectively arranged on both sides of the groove of the bottom plate.

[0008] Further, the bottom of the movable plate is in a groove shape to limit the relative position of the needle rollers.

[0009] Further, one end of the correction plate is rotatably connected to the roller through a pin shaft.

[0010] Further, an adjusting nut is threadedly connected to the inner rod of the cylinder.

[0011] A detection and correction method for the correction and detection device of the above-mentioned automotive power crossbeam is characterized in that it includes the following steps. ① Place the workpiece into the positioning holes of the rear positioning vertical plate and the positioning groove of the intermediate limiting plate. Insert two flat pads with the same thickness between the power crossbeam and the positioning holes of the rear positioning vertical plate to eliminate the difference between the surface of the power crossbeam and the inner surface of the positioning holes of the rear positioning vertical plate. Insert the two inner limiting blocks between the power crossbeam and the positioning groove of the intermediate limiting plate to maintain the difference between the outer surface of the power crossbeam and the inner surface of the positioning groove of the intermediate limiting plate. ② Use a height gauge to draw a horizontal line at the other end of the power crossbeam, observe the deflection direction of the workpiece, and measure the height deviation between the two die parting surfaces of the power crossbeam above the horizontal line with a height dimension to determine the relatively higher end; Remove the flat backing plate from the positioning hole of the rear positioning vertical plate. ③ Use a cylinder to lift the power crossbeam so that one end of the roller of the straightening plate is in the same direction as the relatively higher end of the power crossbeam, and put the straightening hole of the straightening plate onto the surface to be straightened of the power crossbeam; Retract the cylinder push rod, and let the straightening plate fall onto the upper end surface between the movable plates in the bottom plate groove, and install the movable guiding plate onto the bottom plate so that the straightening plate is clamped between the fixed guiding plate and the movable guiding plate; Insert two flat backing plates with the same thickness between the positioning holes of the fixed power crossbeam and the rear positioning vertical plate to eliminate the difference between the surface of the power crossbeam and the inner surface of the positioning hole of the rear positioning vertical plate; Insert two flat backing plates with the same thickness between the surface of the power crossbeam and the inner surface of the straightening hole of the straightening plate to eliminate the difference between the surface of the power crossbeam and the inner surface of the straightening hole of the straightening plate. ④ Make the upper die punch descend and press on the roller of the straightening plate. The straightening plate twists downward from the high point to twist and straighten the power crossbeam. ⑥ After the power crossbeam is twisted, timely measure the actual straightening amount with a height dimension, and determine the required straightening amount for the next time according to the result of one time, and finally straighten it to the standard value. ⑦ After the straightening is completed, irradiate with a horizontal light meter, visually compare with the original line to check the straightening effect, accurately measure the end face height difference after straightening, so as to determine whether the one-time straightening is qualified. If it is unqualified, continue to straighten according to the required straightening direction.

[0012] Compared with the prior art, the present invention has the following outstanding beneficial effects: 1. The straightening plate of the present invention can be used interchangeably left and right according to the shaping requirements, and is suitable for all power crossbeam forgings with different twisting directions. 2. The present invention can protect the non-deformed area of the power crossbeam forging through two inner limit blocks. The straightening plate and the flat backing plate sleeve the forging, which can effectively prevent the power crossbeam from being squeezed and scratched, and realize non-destructive straightening. Brief Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is the front view of the present invention; Figure 3 Figure 2 The sectional view of part A-A in ; Figure 4 is the top view of the present invention; Figure 5 is Figure 4 The sectional view of part B-B in ; Among them, 1. bottom plate; 2. rear positioning mechanism; 21. rear positioning vertical plate; 22. rear limiting plate; 3. intermediate limiting mechanism; 31. inner limiting block; 32. intermediate limiting plate; 4. movable correction mechanism; 41. roller; 42. correction plate; 43. spring limiting block; 45. movable plate; 46. needle roller; 47. spring; 5. cylinder; 6. flat cushion plate. Detailed implementation mode

[0014] The present invention will be further described below in conjunction with the accompanying drawings of the specification and the detailed implementation mode.

[0015] As Figure 1 、 2 and Fig. 4 show, the present invention includes a bottom plate (1), a rear positioning mechanism (2), an intermediate limiting mechanism (3) and a movable correction mechanism (4).

[0016] As Figure 3 shown, the rear positioning mechanism (2), the intermediate limiting mechanism (3) and the movable correction mechanism (4) are successively installed on the bottom plate (1). The rear positioning mechanism (2) includes a rear positioning vertical plate (21) and a rear limiting plate (22). The rear positioning vertical plate (21) is vertically and fixedly installed on the bottom plate (1), and a positioning hole corresponding to the power cross beam is provided on the rear positioning vertical plate (21).

[0017] In an optimized solution, the rear limiting plate (22) is fixedly installed at the positioning hole of the rear positioning vertical plate (21) through bolts.

[0018] The intermediate limiting mechanism (3) includes an intermediate limiting plate (32) and an inner limiting block (31). The intermediate limiting plate (32) is vertically and fixedly installed on the bottom plate (1). The intermediate limiting plate (32) is provided with a positioning groove with an open upper end. Two inner limiting blocks (31) are installed in the positioning groove of the intermediate limiting plate (32), and the two inner limiting blocks (31) are respectively located between the power cross beam and the inner groove wall of the positioning groove of the middle limiting plate.

[0019] As Figure 5 shown, the movable correction mechanism (4) includes a movable plate (45), a fixed guide plate, a movable guide plate, a roller (41), a needle roller (46), a spring (47), a spring limiting block (43) and a correction plate (42). A groove is provided on the bottom plate (1). Spring limiting blocks (43) are respectively installed on the two end walls of the groove. A movable plate (45) is installed in the groove. The two ends of the movable plate (45) are connected to the spring limiting blocks (43) through springs (47). A plurality of needle rollers (46) evenly distributed linearly are installed between the lower end of the movable plate (45) and the bottom wall of the groove.

[0020] The lower end of the correction plate (42) is arc-shaped and is placed on the upper end surface of the movable plate (45). The upper end of the correction plate (42) is provided with a correction hole, and horizontal reference lines are engraved on both end surfaces.

[0021] In the optimization scheme, a fixed guide plate and a movable guide plate are installed on the bottom plate (1). The fixed guide plate is fixedly connected to the bottom plate (1), and the movable guide plate is detachably connected to the bottom plate (1) by bolts. The fixed guide plate and the movable guide plate are respectively arranged on both sides of the groove of the bottom plate (1).

[0022] In the optimization scheme, the bottom of the movable plate (45) is in a groove shape to limit the relative position of the needle roller (46).

[0023] One end of the correction plate (42) is rotatably connected to the roller (41) through a pin shaft.

[0024] A cylinder (5) is installed on the bottom wall, and the inner rod of the cylinder (5) is threadedly connected with an adjusting nut.

[0025] Flat pads (6) are respectively placed in the positioning hole of the rear positioning vertical plate (21) and the correction hole of the correction plate (42).

[0026] A detection and correction method for a correction detection device based on the above-mentioned automotive power crossbeam includes the following steps: Step 1: Place the workpiece into the positioning hole of the rear positioning vertical plate (21) and the positioning groove of the middle limiting plate (32). Insert two flat pads (6) with the same thickness between the power crossbeam and the positioning hole of the rear positioning vertical plate (21) to eliminate the difference between the surface of the power crossbeam and the inner surface of the positioning hole of the rear positioning vertical plate (21). Insert two inner limiting blocks (31) between the power crossbeam and the positioning groove of the middle limiting plate (32) to maintain the difference between the outer surface of the power crossbeam and the inner surface of the positioning groove of the middle limiting plate. Step 2: Use a height gauge to draw a horizontal line at the other end of the power crossbeam, observe the deflection direction of the workpiece, and measure the height deviation between the two parting surfaces of the power crossbeam above the horizontal line with a height dimension to determine the relatively higher end; take out the flat pad (6) in the positioning hole of the rear positioning vertical plate (21). Step 3: Use the cylinder (5) to lift the power crossbeam, making one end of the roller (41) of the straightening plate (42) in the same direction as the relatively higher end of the power crossbeam. Slip the straightening hole of the straightening plate (42) over the surface of the power crossbeam to be straightened. Retract the ejector rod of the cylinder (5) so that the straightening plate (42) drops onto the upper end surface between the movable plates (45) in the groove of the bottom plate (1). Install the movable guide plate on the bottom plate (1) so that the straightening plate (42) is clamped between the fixed guide plate and the movable guide plate. Insert two flat shims (6) of the same thickness between the positioning holes of the fixed power crossbeam and the rear positioning vertical plate (21) to eliminate the difference between the surface of the power crossbeam and the inner surface of the positioning hole of the rear positioning vertical plate (21). Insert two flat shims (6) of the same thickness between the surface of the power crossbeam and the inner surface of the straightening hole of the straightening plate (42) to eliminate the difference between the surface of the power crossbeam and the inner surface of the straightening hole of the straightening plate (42). Step 4: Lower the upper die punch so that it presses on the roller (41) of the straightening plate (42). The straightening plate (42) twists downward from the high point to perform torsional straightening on the power crossbeam. Step 5: After the power crossbeam is twisted, timely measure the actual straightening amount with a height gauge. Determine the required straightening amount for the next time based on the result of one time, and finally achieve the standard value after straightening. Step 6: After the straightening is completed, irradiate with a horizontal light meter, visually compare with the original line to check the straightening effect, accurately measure the height difference of the end face after straightening, so as to determine whether the one-time straightening is qualified. If not, continue straightening in the required straightening direction.

[0027] It should be noted that specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes made without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A correction and detection device for a vehicle power beam, characterized in that: The invention comprises a base plate (1), a rear positioning mechanism (2), an intermediate limiting mechanism (3) and a movable correcting mechanism (4), wherein the base plate (1) is provided with the rear positioning mechanism (2), the intermediate limiting mechanism (3) and the movable correcting mechanism (4) in sequence, wherein the rear positioning mechanism (2) comprises a rear positioning vertical plate (21) and a rear limiting plate (22), wherein the rear positioning vertical plate (21) is vertically fixedly mounted on the base plate (1), and the rear positioning vertical plate (21) is provided with a positioning hole corresponding to the direction of the power cross beam; the intermediate limiting mechanism (3) comprises an intermediate limiting plate (32) and an inner limiting block (31), wherein the intermediate limiting plate (32) is vertically fixedly mounted on the base plate (1), and the intermediate limiting plate (32) is provided with a positioning groove with an upper end opening, wherein two inner limiting blocks (31) are installed in the positioning groove of the intermediate limiting plate (32), and the two inner limiting blocks (31) are respectively located between the inner groove wall of the positioning groove of the power cross beam and the intermediate limiting plate; the movable correcting mechanism (4) comprises a rear positioning vertical plate (21) and a rear limiting plate (22), wherein the rear positioning vertical plate (21) is vertically fixedly mounted on the base plate (1), and the rear positioning vertical plate (21) is provided with a positioning hole corresponding to the direction of the power cross beam; the intermediate limiting mechanism (3) comprises an intermediate limiting plate (32) and an inner limiting block (31), wherein the intermediate limiting plate (32) is vertically fixedly mounted on the base plate (1), and the intermediate limiting plate (32) is provided with a positioning groove with an upper end opening, and two inner limiting blocks (31) are installed in the positioning groove of the intermediate limiting plate (32), and the two inner limiting blocks (31) are respectively located between the inner groove wall of the positioning groove of the power cross beam and the intermediate limiting plate; The mechanism (4) comprises a movable plate (45), a fixed guide plate, a movable guide plate, a roller (41), a needle roller (46), a spring (47), a spring stopper (43) and a correction plate (42). A groove is provided on the bottom plate (1). Spring stopper blocks (43) are respectively installed on the two end walls of the groove for connection. A movable plate (45) is installed in the groove. The two ends of the movable plate (45) are connected to the spring stopper blocks (43) through springs (47). A plurality of needle rollers (46) are installed between the lower end of the movable plate (45) and the bottom wall of the groove and are evenly distributed in a linear manner. The lower end of the correction plate (42) is arc-shaped and is placed on the upper end surface of the movable plate (45). A correction hole is provided on the upper end of the correction plate (42), and horizontal reference lines are engraved on the two end surfaces. A cylinder (5) is installed on the bottom wall. Flat pads (6) are respectively placed in the positioning hole of the rear positioning vertical plate (21) and the correction hole of the correction plate (42).

2. The correction and detection device for a vehicle power beam according to claim 1, characterized in that: The rear limiting plate (22) is fixedly mounted on the positioning hole of the rear positioning vertical plate (21) by means of bolts.

3. The correction and detection device for a vehicle power beam according to claim 1, characterized in that: A fixed guide plate and a movable guide plate are mounted on the bottom plate (1); the fixed guide plate is connected to the bottom plate (1); the movable guide plate is detachably connected to the bottom plate (1) via bolts; the fixed guide plate and the movable guide plate are respectively arranged on both sides of the groove of the bottom plate (1).

4. The correction and detection device for a vehicle power beam according to claim 1, characterized in that: The bottom of the movable plate (45) is in a groove shape to limit the relative position of the needle roller (46).

5. The correction and detection device for a vehicle power beam according to claim 1, characterized in that: One end of the correction plate (42) is rotatably connected to the roller (41) via a pin.

6. The correction and detection device for a vehicle power beam according to claim 1, characterized in that: The inner rod of the cylinder (5) is threadedly connected to the adjusting nut.

7. A detection and correction method based on the above-mentioned correction detection device for the automobile power beam, characterized in that: The following steps are included: ① Place the workpiece into the positioning hole of the rear positioning vertical plate (21) and the positioning groove of the middle limiting plate (32), insert two flat pads (6) of the same thickness between the power beam and the positioning hole of the rear positioning vertical plate (21), eliminate the difference between the power beam surface and the inner surface of the positioning hole of the rear positioning vertical plate (21), insert two inner limiting blocks (31) between the power beam and the positioning groove of the middle limiting plate (32), and maintain the difference between the outer surface of the power beam and the inner surface of the positioning groove of the middle limiting plate; ② Use a height gauge to draw a horizontal line at the other end of the power beam, observe the deflection direction of the workpiece, and use a height gauge to measure the height deviation between the two parting surfaces of the power beam above the horizontal line to determine the relatively higher end; remove the flat pad (6) in the positioning hole of the rear positioning vertical plate (21); ③ Use the cylinder (5) to lift the power beam, so that one end of the roller (41) of the correction plate (42) is in the same direction as the relatively raised end of the power beam, and the correction hole of the correction plate (42) is placed on the surface of the power beam to be corrected; the cylinder (5) push rod is withdrawn, and the correction plate (42) falls into the upper end surface between the movable plates (45) in the groove of the bottom plate (1), and the movable guide plate is installed on the bottom plate (1), so that the correction plate (42) is clamped between the fixed guide plate and the movable guide plate; two flat pads (6) of the same thickness are inserted between the fixed power beam and the positioning hole of the rear positioning vertical plate (21) to eliminate the difference between the power beam surface and the inner surface of the positioning hole of the rear positioning vertical plate (21); two flat pads (6) of the same thickness are inserted between the power beam and the inner surface of the correction hole of the correction plate (42) to eliminate the difference between the power beam surface and the inner surface of the correction hole of the correction plate (42); ④ The upper die pressing head is moved downward to apply pressure to the roller (41) of the correction plate (42), so that the correction plate (42) is twisted downward from the high point to perform twist correction on the power beam; ⑥ After the power beam is twisted, the actual correction amount is measured with the height dimension in a timely manner, and the correction amount required for the next time is determined based on the result of the first time, and the final correction reaches the standard value; ⑦ After the correction is completed, use a horizontal light meter to illuminate, compare the correction effect with the original line, and accurately measure the height difference of the end face after correction, so as to determine whether the correction is qualified. If it is unqualified, continue to correct in the required correction direction.

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