Bent rail correction device and correction process thereof

Abstract

The invention relates to the field of bent rail machining, and particularly discloses a bent rail correcting device and a correcting process thereof. The web flatness of the bent rail is corrected through the push plate, the fixing plate and the correction cushion plate, so that the web of the bent rail recovers to be flat as much as possible, meanwhile, the hard point problem of the web of the bent rail can be solved, the flatness of the web of the bent rail can be improved, in addition, the curvature of the bent rail is adjusted through the correction template, the correction top plate, the filling block and the correction cushion block, and the correction accuracy is improved. By controlling the arrangement position of the correction cushion block and utilizing the thrust of the stretch bender chuck and the correction top plate, the curvature of the bent rail can be adjusted to be within the error range of the target curvature, the correction force of the stretch bender chuck is controllable, the correction process is flexible and convenient, and the use requirement of operators and the machining precision requirement of the bent rail can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of curved rail processing, and particularly relates to a curved rail correction device and a correction process thereof. Background Art

[0002] A curved rail, also known as an orbital bend or a guiding rail, is a key component of the conveying system of an automated production line, and is particularly important in an automobile production line. Its manufacturing needs to meet various performance requirements and usage requirements such as high precision, high strength, wear resistance, and corrosion resistance. Currently, the curved rails used in automobile production lines are generally made of stainless steel No. 12 channel steel.

[0003] During the process of using a stretch bending machine to bend channel steel into a curved rail, the curved rail may have bending errors. The errors of the curved rail mainly include two parts: insufficient flatness of the web and deviation of the radius of curvature. Therefore, it is necessary to correct the errors of the curved rail from these two aspects. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a curved rail correction device and a correction process thereof, so as to solve the problem that the curved rail manufactured by a stretch bending machine has structural errors and needs to be corrected.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A curved rail correction device, comprising:

[0007] A web correction part, comprising a push plate, a fixing plate, and a correction cushion plate. The push plate is connected to the chuck of the stretch bending machine, the fixing plate is fixedly connected to the operation platform of the stretch bending machine, the curved rail is clamped between the push plate and the fixing plate, and the correction cushion plate is clamped at the outer flange of the curved rail;

[0008] A curvature correction part, comprising a correction template, a correction top plate, a filling block, and a correction cushion block. The correction template is fixedly connected to the operation platform of the stretch bending machine, the correction top plate is connected to the chuck of the stretch bending machine, the filling block is filled inside the curved rail, and the correction cushion block is arranged in contact with the curved rail.

[0009] Preferably, the outer edge radius of the correction template is equal to the inner edge radius of the curved rail minus the springback amount.

[0010] Preferably, both the push plate and the correction top plate are fixedly connected to the chuck of the stretch bending machine by bolts.

[0011] Preferably, the cross-section of the filling block is trapezoidal, and the small end of the filling block faces the inside of the curved rail, and the filling block is arranged in a curved arc shape.

[0012] Preferably, the correction cushion block is a curved arc plate.

[0013] A bent rail correction process is applied to a bent rail correction device, including web leveling and curvature correction.

[0014] The web leveling includes:

[0015] Fix the push plate on the chuck of the stretch bender with countersunk bolts, and fix the fixing plate on the operating platform of the stretch bender.

[0016] Place the bent rail with the web facing down on the horizontal correction platform, and determine the part of the web of the bent rail to be corrected.

[0017] Place the bent rail on the fixing plate, place the correction pad at the outer flange of the bent rail, and control the chuck of the stretch bender to drive the push plate to move and press against the bent rail for correction.

[0018] Control the chuck of the stretch bender to drive the push plate to move away, remove the correction pad, adjust the position of the bent rail, control the chuck of the stretch bender to drive the push plate to move and clamp the bent rail, and correct all positions of the bent rail.

[0019] The curvature correction includes:

[0020] Use a workpiece template to detect the tolerance of the radius of the bent rail, and correct the bent rail that exceeds the tolerance range.

[0021] Fix the correction template on the operating platform of the stretch bender, and install the correction top plate on the chuck of the stretch bender with countersunk bolts.

[0022] Place the bent rail with the web facing down flat on the operating platform of the stretch bender, and place three filling blocks at equal intervals inside the bent rail.

[0023] When the radius of the bent rail is greater than the target radius, place a correction pad near the middle filling block between the bent rail and the correction template, use two chucks of the stretch bender to drive the correction top plate to abut against both sides of the outside of the bent rail, and the correction top plate is arranged close to the filling block. When the radius of the bent rail is less than the target radius, place two correction pads near the end filling blocks between the bent rail and the correction template, use one chuck of the stretch bender to drive the correction top plate to abut against the middle of the outer flange of the bent rail, and the correction top plate is arranged close to the filling block.

[0024] Control the chuck of the stretch bender to drive the push plate to move, and correct the radius value of the bent rail to the target radius value by the push plate.

[0025] Preferably, the web leveling further includes:

[0026] Fix the push plate on the chuck of the stretch bender with countersunk bolts, and fix the fixing plate on the operating platform of the stretch bender.

[0027] Place the bent rail with the web facing down on the horizontal correction platform, and determine the hard point position of the web of the bent rail.

[0028] Place the bent rail buckle on the fixed plate, place a calibration shim in the middle of the outer flange of the hard point of the bent rail, and at the same time place two calibration shims at the inner flanges on both sides of the hard point of the bent rail, which are arranged on both sides of the bent rail separately from the first calibration shim. The three calibration shims are arranged in a triangular shape, and control the chuck of the bending machine to drive the push plate to move and press against the hard point of the bent rail for calibration.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] The present invention uses a push plate, a fixed plate and calibration shims to calibrate the flatness of the web of the bent rail twice, so that the web of the bent rail can be restored as flat as possible. At the same time, it can also solve the problem of hard points on the web of the bent rail, which helps to improve the flatness of the web of the bent rail. In addition, a calibration template, a calibration top plate, a filling block and calibration pads are used to adjust the curvature of the bent rail. By controlling the layout position of the calibration pads and using the thrust of the chuck of the bending machine and the calibration top plate, the curvature of the bent rail can be adjusted within the error range of the target curvature. The calibration force of the chuck of the bending machine is controllable, making the calibration process flexible and convenient, and can meet the usage requirements of the operator and the processing accuracy requirements of the bent rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the overall structure of a bent rail correction device disclosed by the present invention Figure 1 ;

[0032] Figure 2 Schematic diagram of the overall structure of a bent rail correction device disclosed by the present invention Figure 2 ;

[0033] Figure 3 Schematic diagram of the structure for using the web leveling of a bent rail correction device disclosed by the present invention Figure 1 ;

[0034] Figure 4 Schematic diagram of the structure for using the web leveling of a bent rail correction device disclosed by the present invention Figure 2 ;

[0035] Figure 5 Schematic diagram of the structure for using the curvature correction of a bent rail correction device disclosed by the present invention Figure 1 ;

[0036] Figure 6 Schematic diagram of the structure for using the curvature correction of a bent rail correction device disclosed by the present invention Figure 2 ;

[0037] Figure 7 Schematic diagram of the structure for using the curvature correction of a bent rail correction device disclosed by the present invention Figure 3 ;

[0038] Figure 8 Schematic diagram of the cooperation structure between the bent rail and the filling block of a bent rail correction device disclosed by the present invention;

[0039] In the figure: 1. Draw-bending machine chuck; 2. Push plate; 3. Fixed plate; 4. Bent rail; 5. Calibration backing plate; 6. Calibration template; 7. Calibration top plate; 8. Filling block; 9. Calibration spacer block. Specific implementation mode

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment:

[0042] Please refer to Figures 1 - 8 As shown in the figure, a bent rail correction device includes:

[0043] Web calibration part, including a push plate 2, a fixed plate 3 and a calibration backing plate 5. The push plate 2 is connected to the draw-bending machine chuck 1, the fixed plate 3 is fixedly connected to the draw-bending machine operation platform, the bent rail 4 is clamped between the push plate 2 and the fixed plate 3, and the calibration backing plate 5 is clamped at the outer flange of the bent rail 4;

[0044] Curvature calibration part, including a calibration template 6, a calibration top plate 7, a filling block 8 and a calibration spacer block 9. The calibration template 6 is fixedly connected to the draw-bending machine operation platform, the calibration top plate 7 is connected to the draw-bending machine chuck 1, the filling block 8 is filled inside the bent rail 4, and the calibration spacer block 9 is arranged in contact with the bent rail 4.

[0045] As can be seen from the above, the push plate 2, the fixed plate 3 and the calibration backing plate 5 are used to calibrate the flatness of the web of the bent rail 4 twice, so that the web of the bent rail 4 can be restored as flat as possible. At the same time, the problem of hard points on the web of the bent rail 4 can also be solved, which helps to improve the flatness of the web of the bent rail 4. In addition, the calibration template 6, the calibration top plate 7, the filling block 8 and the calibration spacer block 9 are used to adjust the curvature of the bent rail 4. By controlling the layout position of the calibration spacer block 9 and using the thrust of the draw-bending machine chuck 1 and the calibration top plate 7, the curvature of the bent rail 4 can be adjusted within the error range of the target curvature. The calibration force of the draw-bending machine chuck 1 is controllable, making the calibration process flexible and convenient, and meeting the usage requirements of operators and the processing accuracy requirements of the bent rail 4.

[0046] Please refer to Figures 1 - 4As shown, the thickness of the calibration cushion plate 5 is 3 to 4 millimeters. Most of the channel steels used to manufacture the bent rail 4 are No. 12 stainless steel channel steels. During the process of bending the channel steel to prepare the bent rail, the outer flange of the bent rail 4 will bend and become thinner and lower at the same time. Compared with the height of the inner flange of the bent rail 4, it will be about 2.5 mm lower. During the process of correcting the flatness of the web of the bent rail 4, in order to avoid calibration errors caused by the height difference between the inner and outer flanges of the bent rail 4, the calibration cushion plate 5 can be placed at the outer flange of the bent rail 4, and the interference thickness of 1 to 1.5 millimeters can be ignored.

[0047] Please refer to Figures 6 - 8 As shown, the outer radius of the calibration template 6 is equal to the inner radius of the bent rail 4 minus the springback amount.

[0048] Both the push plate 2 and the calibration top plate 7 are fixedly connected to the chuck 1 of the stretch bender by bolts, which is convenient for the user to install and disassemble the push plate 2 and the calibration top plate 7 according to needs.

[0049] Please refer to Figure 8 As shown, the cross-section of the filling block 8 is trapezoid-shaped, and the small end of the filling block 8 faces the inside of the bent rail 4. There are rounded corners at the edges of the filling block 8. At this time, there is a gap between the filling block 8 and the inner wall of the bent rail 4, which is convenient for the deformation correction of the bent rail 4. The filling block 8 is bent in an arc shape, which is convenient for clamping the filling block 8 inside the bent rail 4.

[0050] The calibration cushion block 9 is a bent arc-shaped plate.

[0051] A bent rail correction process is applied to a bent rail correction device, including web leveling and curvature correction.

[0052] The web leveling includes:

[0053] Fix the push plate 2 on the chuck 1 of the stretch bender using countersunk head bolts, and fix the fixed plate 3 on the operation platform of the stretch bender;

[0054] Place the web of the bent rail 4 downward on the horizontal correction platform, and determine the part of the web of the bent rail 4 to be corrected;

[0055] Place the bent rail 4 on the fixed plate 3, place the calibration cushion plate 5 at the outer flange of the bent rail 4, and control the chuck 1 of the stretch bender to drive the push plate 2 to move and press against the bent rail 4 for correction;

[0056] Control the chuck 1 of the stretch bender to drive the push plate 2 to move away, remove the calibration cushion plate 5, adjust the position of the bent rail 4, control the chuck 1 of the stretch bender to drive the push plate 2 to move and clamp the bent rail 4, and correct all positions of the bent rail 4;

[0057] The curvature correction includes:

[0058] Use a workpiece sample to detect the tolerance of the radius of the curved rail 4, and correct the curved rail 4 that exceeds the tolerance range;

[0059] The correction template 6 is fixedly installed on the operating platform of the bending machine, and the correction top plate 7 is installed on the clamping head 1 of the bending machine through countersunk bolts;

[0060] Place the web of the curved rail 4 downward on the operating platform of the stretch bending machine, and place three filling blocks 8 at equal intervals inside the curved rail 4;

[0061] When the radius of the curved track 4 is larger than the target radius, a correction pad 9 is placed between the curved track 4 and the correction template 6, and the correction pad 9 is placed close to the middle filling block 8. Two bending machine clamps 1 are used to drive the correction top plate 7 to abut against the two sides of the outer side of the curved track 4, and the correction top plate 7 is set close to the filling block 8. When the radius of the curved track 4 is smaller than the target radius, two correction pads 9 are placed between the curved track 4 and the correction template 6, and the correction pads 9 are placed close to the filling blocks 8 at both ends. A bending machine clamp 1 is used to drive the correction top plate 7 to abut against the middle of the outer side of the curved track 4, and the correction top plate 7 is set close to the filling block 8.

[0062] The clamping head 1 of the draw-bending machine is controlled to drive the push plate 2 to move, and the push plate 2 corrects the radius value of the curved rail 4 to the target radius value.

[0063] The web leveling also includes:

[0064] Fix the push plate 2 on the clamping head 1 of the bending machine with countersunk bolts, and fix the fixing plate 3 on the operating platform of the bending machine;

[0065] Place the web of curved rail 4 downward on the horizontal correction platform and determine the hard point position of the web of curved rail 4;

[0066] Buckle the curved rail 4 onto the fixed plate 3, place a correction pad 5 in the middle of the outer flange of the curved rail 4, and simultaneously place two correction pads 5 at the inner flanges on both sides of the hard point of the curved rail 4, and arrange them on both sides of the curved rail 4 with the first correction pad 5. The three correction pads 5 are arranged in a herringbone shape, and the clamping head 1 of the drawing and bending machine is controlled to drive the push plate 2 to move and support the hard point of the curved rail 4 for correction.

[0067] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0068] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more unless specifically and explicitly defined otherwise.

[0069] In the present invention, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0071] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0072] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A bent rail correction device, characterized in that, Including: Web correction part, including a push plate (2), a fixed plate (3) and a correction cushion plate (5). The push plate (2) is connected to the chuck (1) of the stretch bending machine. The fixed plate (3) is fixedly connected to the operation platform of the stretch bending machine. The bending rail (4) is clamped between the push plate (2) and the fixed plate (3). The correction cushion plate (5) is clamped at the outer flange of the bending rail (4); Curvature correction part, including a correction template (6), a correction top plate (7), a filling block (8) and a correction cushion block (9). The correction template (6) is fixedly connected to the operation platform of the stretch bending machine. The correction top plate (7) is connected to the chuck (1) of the stretch bending machine. The filling block (8) is filled inside the bending rail (4). The correction cushion block (9) is arranged in contact with the bending rail (4).

2. The rail bending correction device according to claim 1, characterized in that: The outer edge radius of the correction template (6) is equal to the inner edge radius of the bending rail (4) minus the springback amount.

3. A curved rail correction device according to claim 1, characterized in that: Both the push plate (2) and the correction top plate (7) are fixedly connected to the chuck (1) of the stretch bending machine by bolts.

4. A curved rail correction device according to claim 1, characterized in that: The cross section of the filling block (8) is trapezoidal, and the small end of the filling block (8) faces the inside of the bending rail (4). The filling block (8) is arranged in a curved arc shape.

5. A rail bending correction device according to claim 1, characterized in that: The correction cushion block (9) is a curved arc plate.

6. A bent rail correction process, characterized in that, Applied to a bending rail correction device according to any one of claims 1-5, including web leveling and curvature correction, The web leveling includes: Fix the push plate (2) on the chuck (1) of the stretch bending machine using countersunk bolts, and fixedly install the fixed plate (3) on the operation platform of the stretch bending machine; Place the bending rail (4) with its web facing down on the horizontal correction platform, and determine the part of the web of the bending rail (4) to be corrected; Place the bending rail (4) on the fixed plate (3), place the correction cushion plate (5) at the outer flange of the bending rail (4), and control the chuck (1) of the stretch bending machine to drive the push plate (2) to move and press against the bending rail (4) for correction; Control the chuck (1) of the stretch bending machine to drive the push plate (2) to move away, remove the correction cushion plate (5), adjust the position of the bending rail (4), control the chuck (1) of the stretch bending machine to drive the push plate (2) to move and clamp the bending rail (4), and correct all positions of the bending rail (4); The curvature correction includes: Use a workpiece template to detect the tolerance of the radius of the bending rail (4), and correct the bending rail (4) that exceeds the tolerance range; Fix the correction template (6) on the operation platform of the stretch bending machine, and install the correction top plate (7) on the chuck (1) of the stretch bending machine by countersunk bolts; Place the bending rail (4) with its web facing down flat on the operation platform of the stretch bending machine, and place three filling blocks (8) at equal intervals inside the bending rail (4); When the radius of the curved track (4) is greater than the target radius, a correction pad (9) is placed between the curved track (4) and the correction template (6) and is located close to the middle filling block (8). Two bending machine clamps (1) are used to drive the correction top plate (7) to abut against the two sides of the outer side of the curved track (4), and the correction top plate (7) is set close to the filling block (8). When the radius of the curved track (4) is less than the target radius, two correction pads (9) are placed between the curved track (4) and the correction template (6) and are located close to the filling blocks (8) at both ends. A bending machine clamp (1) is used to drive the correction top plate (7) to abut against the middle of the outer flange of the curved track (4), and the correction top plate (7) is set close to the filling block (8). The clamping head (1) of the drawing and bending machine is controlled to drive the push plate (2) to move, and the push plate (2) corrects the radius value of the curved rail (4) to the target radius value.

7. A bent rail correction process according to claim 6, characterized in that: The web leveling also includes: The push plate (2) is fixed to the clamping head (1) of the bending machine by using countersunk bolts, and the fixing plate (3) is fixedly installed on the operating platform of the bending machine; Place the web of the curved rail (4) downward on a horizontal correction platform to determine the hard point position of the web of the curved rail (4); The curved rail (4) is buckled onto the fixed plate (3), a correction pad (5) is placed at the middle of the outer flange of the hard point of the curved rail (4), and two correction pads (5) are placed at the inner flanges on both sides of the hard point of the curved rail (4), and are arranged on both sides of the curved rail (4) together with the first correction pad (5). The three correction pads (5) are arranged in a herringbone shape, and the clamping head (1) of the drawing and bending machine is controlled to drive the push plate (2) to move and support the hard point of the curved rail (4) for correction.

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