A radian correction device and a radian correction method

Abstract

The present invention relates to the technical field of workpiece shaping, and discloses a radian shaping device and a radian shaping method. The radian shaping device includes a driving member, a pressure roller and two support columns. The pressure roller is vertically arranged and connected to the output end of the driving member, and the driving member can drive the pressure roller to move along a first direction; the two support columns are arranged at intervals and parallel to the pressure roller, and the pressure roller is located on the perpendicular midline of the line connecting the centers of the two support columns; the arc-shaped workpiece has a convex position and / or a concave position. When the arc-shaped workpiece has a convex position, the inner surface of the arc-shaped workpiece faces the pressure roller, and the outer surface abuts on the two support columns; when the arc-shaped workpiece has a concave position, the outer surface of the arc-shaped workpiece faces the pressure roller, and the inner surface abuts on the two support columns. The arc-shaped workpiece is shaped by the radian shaping device to shape the deformation position of the arc-shaped workpiece so that the overall deviation of its inner diameter can be guaranteed to be around ±1mm, thereby improving its assembly fit, and helping to reduce the labor intensity of the operator and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece shape correction, and in particular to a radian shape correction device and a radian shape correction method. Background Art

[0002] A plate roll is a versatile device used to bend metal sheets into cylindrical, curved, or other shapes. Existing three-roller plate rolls roll the sheet metal into a semi-circular workpiece. After rolling, the workpiece's inner diameter can have a local tolerance of ±4mm. However, in actual assembly, to ensure a proper fit, the overall inner diameter tolerance of the semi-circular workpiece must be around ±1mm. Currently, this correction is primarily achieved through manual, mechanical hammering, a time-consuming and labor-intensive process with low production efficiency.

[0003] Therefore, there is an urgent need to provide a radian correction device and a radian correction method to solve the above problems. Summary of the Invention

[0004] One object of the present invention is to provide a curvature correction device that can correct the curvature of a curved workpiece, thereby reducing the labor intensity of operators and improving production efficiency.

[0005] Another object of the present invention is to provide a curvature correction method. By using the above-mentioned curvature correction device to correct the curvature of the curved workpiece, the curved workpiece can meet the curvature requirements, which is beneficial to reducing the labor intensity of the operator and improving production efficiency.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A radian correction device, comprising:

[0008] A driving member and a pressure roller, wherein the pressure roller is vertically arranged and connected to an output end of the driving member, and the driving member is capable of driving the pressure roller to move along a first direction;

[0009] Two support columns are arranged at intervals and parallel to the pressure roller, the pressure roller is located on the perpendicular midline of the line connecting the centers of the two support columns, and the arc-shaped workpiece is placed between the pressure roller and the two support columns;

[0010] The arc-shaped workpiece has a convex position and / or a concave position. When the arc-shaped workpiece has a convex position, the inner surface of the arc-shaped workpiece faces the pressure roller, and the outer surface abuts against the two support columns; when the arc-shaped workpiece has the concave position, the outer surface of the arc-shaped workpiece faces the pressure roller, and the inner surface abuts against the two support columns.

[0011] As an optional solution, the number of the driving members is set to two, the two driving members are arranged at intervals in the up and down directions, and the pressure roller is connected to the output ends of the two driving members at the same time.

[0012] As an optional solution, the pressure roller includes a pressure roller body and a first mounting frame, the first mounting frame is connected to the output end of the driving member, the pressure roller body is a circular tube structure, and the pressure roller body is welded to the first mounting frame.

[0013] As an optional solution, the curvature correction device also includes a bracket, which includes an upper end plate, a lower end plate and a column. The upper end plate and the lower end plate are arranged at intervals above and below, the column is supported between the upper end plate and the lower end plate, and the driving member is fixed on the column.

[0014] As an optional solution, a first sliding groove is formed on the upper end plate, and the first sliding groove extends along the first direction. A first sliding block is provided on the top of the first mounting frame, and the first sliding block is inserted into the first sliding groove and can slide along the first sliding groove.

[0015] A first bearing is rotatably provided on the first sliding block, and the first bearing is in rolling engagement with the upper surface of the upper end plate.

[0016] As an optional solution, the two support columns are respectively a movable support column and a fixed support column, the movable support column is fixed on a second mounting frame, the second mounting frame is located between the upper end plate and the lower end plate, and can drive the movable support column to move relative to the bracket, the fixed support column is fixed on a third mounting frame, and the third mounting frame is fixed between the upper end plate and the lower end plate.

[0017] As an optional solution, a second slide groove is provided on the upper end plate, the second slide groove is configured in a bent shape, a second slider is provided on the top of the second mounting frame, the second slider is inserted into the second slide groove and can slide along the second slide groove;

[0018] A second bearing is rotatably provided on the second sliding block, and the second bearing is in rolling engagement with the upper surface of the upper end plate.

[0019] As an optional solution, a first limit block, a second limit block and a third limit block are set on the lower end plate, and the first limit block, the second limit block and the third limit block are respectively stopped on the side surfaces of the second mounting frame in three different directions, and the third limit block is detachably connected to the lower end plate.

[0020] As an optional solution, two groups of roller assemblies are further included, each group of roller assemblies includes a plurality of rotatably arranged rollers, and the plurality of rollers in each group are evenly arranged on the pad along a circular direction.

[0021] A method for correcting the curvature of a curved workpiece, wherein the curvature of the curved workpiece is corrected using any of the curvature correction devices described above, and the specific steps include:

[0022] Step S1: comparing the arc-shaped workpiece with a standard sample, manually confirming whether the arc-shaped workpiece has convex or concave positions, and making concave and convex marks at each position;

[0023] Step S2: Correcting each position according to the concave and convex marks. When correcting the convex position of the arc-shaped workpiece, the inner surface of the arc-shaped workpiece faces the pressing roller, and the outer surface abuts against the two support columns. The driving member drives the pressing roller to apply radial pressure to the convex position.

[0024] When the concave position of the arc-shaped workpiece is corrected, the outer surface of the arc-shaped workpiece is made to face the pressing roller, and the inner surface thereof is made to abut against the two support columns, and the pressing roller is driven by the driving member to apply radial pressure to the concave position;

[0025] Step S3: After the entire arc workpiece is calibrated once, it is compared with the standard sample again. If the inner diameter deviation of a certain part of the arc workpiece is outside the allowable error range, the arc workpiece needs to be calibrated again according to the concave and convex conditions until the error requirements are met.

[0026] The beneficial effects of the present invention are:

[0027] The arc correction device provided by the present invention, when in use, first needs to manually determine whether the arc workpiece has a convex position or a concave position. When the arc workpiece has a convex position, the arc workpiece is placed between a pressure roller and two support columns, so that the inner surface of the arc workpiece faces the pressure roller and the outer surface abuts the two support columns, and the two support columns support the arc workpiece. Then, the pressure roller is driven by a driving member to move toward the arc workpiece, and the roller surface of the pressure roller contacts and applies pressure to the inner arc surface of the arc workpiece, causing the convex position to deform. When the arc workpiece has a concave position, the arc workpiece is placed between a pressure roller and two support columns, so that the outer surface of the arc workpiece faces the pressure roller and the inner surface abuts the two support columns, and the two support columns support the arc workpiece. Then, the pressure roller is driven by a driving member to move toward the arc workpiece, and the roller surface of the pressure roller contacts and applies pressure to the outer arc surface of the arc workpiece, causing the concave position to deform. By using the above-mentioned arc correction device to repeatedly correct the deformation position of the arc-shaped workpiece, the overall deviation range of its inner diameter can be guaranteed to be around ±1mm, and finally the arc surface meets the requirements of the drawing, thereby improving its assembly fit, and helping to reduce the labor intensity of the operator and improve production efficiency.

[0028] The curvature correction method provided by the present invention uses the above-mentioned curvature correction device to correct the curvature of the curved workpiece, so that the overall deviation range of its inner diameter can be guaranteed to be around ±1mm, and finally the curved surface meets the requirements of the drawing, thereby improving its assembly fit, and helping to reduce the labor intensity of the operator and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly and easily illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 1 is a schematic structural diagram of a radian correction device provided by an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0032] Figure 3 This is a top view of the internal structure of the bracket provided by an embodiment of the present invention with the upper end cover hidden;

[0033] Figure 4 Schematic diagram of the coordination between the arc correction device and the arc-shaped workpiece provided by an embodiment of the present invention;

[0034] Figure 5Schematic diagram of the structure of a curved workpiece provided by an embodiment of the present invention;

[0035] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0036] Figure 7 yes Figure 5 A partial enlarged view of point C in the middle;

[0037] Figure 8 Schematic diagram of a bracket and its internal structure provided by an embodiment of the present invention.

[0038] In the picture:

[0039] 100, arc-shaped workpiece; 110, actual arc surface; 120, standard arc surface;

[0040] 1. Driving parts;

[0041] 2. Pressing roller; 21. Pressing roller body; 22. First mounting frame; 221. First slider; 222. First bearing;

[0042] 3. Support column; 31. Mobile support column; 32. Fixed support column; 33. Second mounting bracket; 331. Second slider; 332. Second bearing; 34. Third mounting bracket;

[0043] 4. Bracket; 41. Upper end plate; 411. First chute; 412. Second chute; 4121. First straight chute; 4122. Circular chute; 4123. Second straight chute; 42. Lower end plate; 43. Column; 44. First stopper; 45. Second stopper; 46. Third stopper;

[0044] 5. Roller assembly; 51. Roller;

[0045] 6. Pad; 7. Oil pump motor assembly; 8. Air-cooled radiator; 9. Hydraulic control valve assembly. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0047] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] This embodiment provides a radian correction device for correcting the radian of a curved workpiece 100 so as to meet production requirements. Figure 1 、 Figure 3 and Figure 4 As shown, the radian correction device includes a driving member 1, a pressure roller 2 and two support columns 3. The pressure roller 2 is vertically arranged and connected to the output end of the driving member 1. The driving member 1 can drive the pressure roller 2 to move along a first direction. The first direction is Figure 1 The first direction is the X direction in the middle of the roller 2. The two support columns 3 are arranged at intervals and are parallel to the pressure roller 2. The pressure roller 2 is located on the perpendicular bisector of the line connecting the centers of the two support columns 3. The first direction is the direction in which the perpendicular bisector of the line connecting the centers of the two support columns 3 extends. The arc-shaped workpiece 100 is placed between the pressure roller 2 and the two support columns 3. The central angle of the two support columns 3 is preferably 60° to ensure that the distance between the two support columns 3 is not too far and that they can respectively contact the arc surface of the arc-shaped workpiece 100, thereby supporting the arc-shaped workpiece 100.

[0051] The arc-shaped workpiece 100 has convex positions and / or concave positions. For example, referring to Figures 5 to 7 The dotted line represents the standard arc surface 120 of the standard sample, and the solid line represents the actual arc surface 110 of the arc workpiece 100. The actual arc surface 110 of the arc workpiece 100 is compared with the standard arc surface 120 of the standard sample. Figure 6 As shown, when a certain position of the actual arc surface 110 is convex inward relative to the inner arc surface of the standard arc surface 120, the position is judged to be a convex position, such as Figure 7 As shown, when a certain position of the actual arc surface 110 is recessed outward relative to the inner arc surface of the standard arc surface 120, that position is determined to be a recessed position. When the arc-shaped workpiece 100 has a convex position, the inner surface of the arc-shaped workpiece 100 faces the pressing roller 2, and the outer surface abuts the two support pillars 3. When the arc-shaped workpiece 100 has a recessed position, the outer surface of the arc-shaped workpiece 100 faces the pressing roller 2, and the inner surface abuts the two support pillars 3.

[0052] When using the arc correction device provided by the present invention, first use a standard sample to test the rolled arc workpiece 100, manually confirm the deviation type of the inner diameter of the arc workpiece 100, that is, determine whether the arc workpiece 100 has a convex position or a concave position, and use chalk or a marker to make concave and convex marks on the outer arc surface or inner arc surface at each position. When correcting the convex position of the arc workpiece 100, such as Figure 4As shown, the arc-shaped workpiece 100 is placed between the pressing roller 2 and the two support columns 3, so that the inner surface of the position marked with the raised mark on the arc-shaped workpiece 100 faces the pressing roller 2, and the outer surface abuts against the two support columns 3. The two support columns 3 support the arc-shaped workpiece 100, and then the pressing roller 2 is driven by the driving member 1 to move toward the arc-shaped workpiece 100. The roller surface of the pressing roller 2 contacts the inner arc surface of the arc-shaped workpiece 100, and a radial pressure away from the center of the arc-shaped workpiece 100 is applied to the tangent point position, causing the raised position to deform. If there are multiple raised marking points on a arc-shaped workpiece 100, the curvature correction is performed on each marking point in turn. When the concave position of the arc-shaped workpiece 100 is calibrated, the placement direction of the arc-shaped workpiece 100 is opposite to that of the convex position. After the arc-shaped workpiece 100 is placed between the pressure roller 2 and the two support columns 3, the outer surface of the position marked with the concave mark on the arc-shaped workpiece 100 faces the pressure roller 2, and the inner surface abuts against the two support columns 3. The two support columns 3 support the arc-shaped workpiece 100, and then the pressure roller 2 is driven by the driving member 1 to move toward the arc-shaped workpiece 100. The roller surface of the pressure roller 2 contacts the outer arc surface of the arc-shaped workpiece 100 and applies a radial pressure toward the center of the arc-shaped workpiece 100 to the tangent point, causing the concave position to deform. Similarly, if there are multiple concave marking points on an arc-shaped workpiece 100, the arc calibration is performed on each marking point in turn. In addition, if there are both convex and concave positions on an arc-shaped workpiece 100, the convex position can be calibrated first, and then the concave position can be calibrated, or the order can be interchanged. After the arc workpiece 100 is completely calibrated, it needs to be compared with the standard sample again. If it is still not within the allowable error range, the arc workpiece 100 needs to be calibrated repeatedly until the error requirements are met.

[0053] The arc-correction device provided in this embodiment, because the arcs are tangent to each other at the point of tangency, the force applied by the pressure roller 2 on the arc surface can be concentrated on the concave and convex parts of the arc surface, while the support column 3 only provides support for the arc surface, with little effect on the deformation of the arc surface. By using the above-mentioned arc-correction device to repeatedly correct the deformed position of the arc-shaped workpiece 100, the overall deviation range of its inner diameter can be guaranteed to be approximately ±1mm, ultimately making the arc surface meet the requirements of the drawing, thereby improving its assembly fit. Compared with manual mechanical hammering, it can help reduce the labor intensity of operators, improve production efficiency, and resolve safety hazards.

[0054] Preferably, the driving member 1 is a hydraulic cylinder, which has a simple structure, large output force, stable performance and reliable operation. Furthermore, the arc correction device also includes an oil pump motor assembly 7, a hydraulic control valve assembly 9 and an air-cooled radiator 8. One end of the hydraulic control valve assembly 9 is connected to the oil pump motor assembly 7, and the other end is connected to the hydraulic cylinder through an external pipeline. The oil pump motor assembly 7 pumps the hydraulic oil in the oil tank, and the hydraulic control valve assembly 9 controls the forward and backward movement of the piston rod of the hydraulic cylinder. By the different extension or retraction lengths of the piston rod, the pressure roller 2 is pushed forward or backward, and then the pressure roller 2 is controlled to correct the arc workpiece 100. The air-cooled radiator 8 is used to dissipate heat from the hydraulic oil. Among them, the specific structure and working principle of the oil pump motor assembly 7 and the hydraulic control valve assembly 9 are all existing technologies and will not be repeated here.

[0055] Furthermore, if Figure 1 As shown, there are two driving members 1, which are spaced apart in the vertical direction. There is one pressure roller 2, which is simultaneously connected to the output ends of the two driving members 1. The length of the pressure roller 2 is slightly greater than the axial length of the arc-shaped workpiece 100, so that the pressure roller 2 can completely contact the arc-shaped workpiece 100 along the axial direction. When a certain position of the arc-shaped workpiece 100 has deviations along the entire axial direction, for example, when both the upper and lower arc surfaces have convex or concave positions along the axial direction, the two driving members 1 operate synchronously, so that the entire pressure roller 2 applies pressure to each axial position of the arc-shaped workpiece 100 to correct the convex or concave positions. However, when there are deviations in some positions of the arc-shaped workpiece 100 along the axial direction or the deviation types are different, for example, there are convex positions or concave positions on the upper arc-shaped surface, but no deviation positions on the lower arc-shaped surface, or there are convex positions on the upper arc-shaped surface, but a concave position on the lower arc-shaped surface, the two driving members 1 may be asynchronous, that is, the two driving members 1 first operate synchronously, driving the pressure roller 2 to a position in contact with the arc-shaped workpiece 100, and then the lower driving member 1 stops moving, so that the pressure roller 2 in the lower part only abuts against the surface of the arc-shaped workpiece 100 for support, and no further pressure is applied to the lower part of the arc-shaped workpiece 100, while the upper driving member 1 continues to drive the pressure roller 2 in the upper part to apply pressure to the arc-shaped workpiece 100 for correction, thereby facilitating the correction of the upper and lower arc surfaces of the arc-shaped workpiece 100 respectively. It should be noted that in order to prevent jamming, the output ends of the pressure roller 2 and the driving member 1 can be connected in a floating manner. Whether the two driving members 1 operate synchronously can be adaptively selected by technicians in this field according to the actual deviation type.

[0056] Furthermore, if Figure 1 and Figure 8As shown, the curvature correction device also includes a bracket 4, which includes an upper end plate 41, a lower end plate 42 and a column 43. The upper end plate 41 and the lower end plate 42 are arranged at intervals in the upper and lower directions. The column 43 is supported between the upper end plate 41 and the lower end plate 42. The driving member 1 is fixed on the column 43. The above-mentioned pressure roller 2 and the two support columns 3 are all erected between the upper end plate 41 and the lower end plate 42.

[0057] Furthermore, if Figure 3 and Figure 8 As shown, the pressure roller 2 specifically includes a pressure roller body 21 and a first mounting frame 22. The first mounting frame 22 is connected to the output end of the driving member 1. The pressure roller body 21 is a round tube structure and is welded to the first mounting frame 22. The first mounting frame 22 is welded by multiple plates. The pressure roller body 21 is a D164X14 round tube and is welded to the plates of the first mounting frame 22, thereby ensuring the reliability of the structural strength of the pressure roller 2.

[0058] Preferably, if Figure 1 and Figure 2 As shown, the upper end plate 41 is provided with a first slide groove 411 extending in a first direction. A first slider 221 is provided at the top of the first mounting bracket 22. The first slider 221 is inserted into and can slide along the first slide groove 411. A first bearing 222 is rotatably provided on the first slider 221, and the first bearing 222 rolls along the upper surface of the upper end plate 41. When the driving member 1 drives the pressure roller 2 to move in the first direction, the first bearing 222 can roll along the upper surface of the upper end plate 41, thereby reducing sliding friction, making the movement of the pressure roller 2 smoother and preventing movement jamming.

[0059] Furthermore, if Figure 1 and Figure 3 As shown, the two support columns 3 are a mobile support column 31 and a fixed support column 32. The mobile support column 31 is fixed to a second mounting frame 33, which is located between the upper end plate 41 and the lower end plate 42 and can drive the mobile support column 31 to move relative to the bracket 4. The second mounting frame 33 is welded from three side panels and two end plates at the ends of the three side panels. The mobile support column 31 is made of D164X14 round tube and is welded to the plate of the second mounting frame 33, thereby ensuring the overall structural strength. The fixed support column 32 is fixed to a third mounting frame 34, which is fixed between the upper end plate 41 and the lower end plate 42, thereby providing support for the upper end plate 41 and the lower end plate 42. Among them, the third mounting frame 34 has the same structure as the second mounting frame 33, and is also welded by three side panels and two end plates located at both ends of the three side panels. The fixed support column 32 adopts a D164X14 round tube and is welded and fixed to the plate of the third mounting frame 34, thereby ensuring the overall structural strength.

[0060] Specifically, if Figure 1 and Figure 2 As shown, in order to enable the second bracket 4 to drive the movable support column 31 to move relative to the bracket 4, a second slide groove 412 is provided on the upper end plate 41. The second slide groove 412 is configured in a bent shape. A second slider 331 is provided on the top of the second mounting frame 33. The second slider 331 is inserted into the second slide groove 412 and can slide along the second slide groove 412. A second bearing 332 is rotatably provided on the second slider 331. The second bearing 332 is in rolling engagement with the upper surface of the upper end plate 41. Figure 8 As shown, the second chute 412 includes a first straight chute 4121, a second straight chute 4123, and a circular chute 4122 located between the two straight chute. The two straight chute are arranged at an angle, with the first straight chute 4121 being close to the first chute 411, and the second straight chute 4123 starting from the circular chute 4122 and extending in a direction away from the pressure roller 2. When encountering a curved workpiece 100 with other structural parts welded on the back at a position requiring correction, the operator moves the second bracket 4 so that it drives the first slider 221 to first slide along the first straight chute 4121, slide to the circular chute 4122, turn, and continue to slide along the second straight chute 4123, ultimately causing the movable support column 31 to move outward a certain distance, thereby allowing the movable support column 31 to avoid the welded structural parts on the back of the curved workpiece 100. When inserting the curved workpiece 100 into the space between the pressure roller 2 and the two support columns 3, it can be inserted from the side of the movable support column 31 to prevent the movable support column 31 from interfering with the welded structure on the back of the curved workpiece 100. At the same time, when the second slider 331 slides along the second slide groove 412, the second bearing 332 can roll along the upper surface of the upper end plate 41, thereby reducing sliding friction, making the movement of the second mounting bracket 33 smoother and preventing movement jamming.

[0061] Furthermore, if Figure 1 、 Figure 3 and Figure 8As shown, the lower end plate 42 is provided with a first limit block 44, a second limit block 45, and a third limit block 46. The first limit block 44, the second limit block 45, and the third limit block 46 respectively stop the side surfaces of the second mounting bracket 33 in three different directions, and the third limit block 46 is detachably connected to the lower end plate 42. Specifically, the third limit block 46 is fixed to the lower end plate 42 by fasteners, making assembly and disassembly easy. When the second mounting bracket 33 and the movable support column 31 need to be moved, the fasteners are removed and the third limit block 46 is removed from the lower end plate 42. At this time, the second mounting bracket 33 can be moved. The second mounting bracket 33 first slides along the first straight slot 4121, and the bottom of the second mounting bracket 33 slides out of the second limit block 45. When the second mounting bracket 33 slides along the second straight slot 4123, the second limit block 45 no longer limits the bottom of the second mounting bracket 33. After the arc-shaped workpiece 100 is inserted, the second mounting frame 33 and the movable support column 31 need to be reset. After resetting, the third limit block 46 can be installed. At this time, the first limit block 44, the second limit block 45 and the third limit block 46 are respectively stopped on the sides of the second mounting frame 33 in three different directions to prevent the second mounting frame 33 from moving during the correction process.

[0062] Further, combined with Figure 1 and Figure 4 The arc correction device also includes two sets of roller assemblies 5. Each set of roller assemblies 5 includes a plurality of rotatable rollers 51. The rollers 51 in each set are evenly arranged in an annular direction on the backing plate 6. The arc formed by connecting the midpoints of the rollers 51 is substantially the same as the arc of the arc-shaped workpiece 100. The arc-shaped workpiece 100 can be slid between the pressure roller 2 and the two support columns 3 by the rotation of the rollers 51, thereby facilitating the circumferential movement of the arc-shaped workpiece 100. The two sets of roller assemblies 5 are respectively suitable for two placement positions of the arc-shaped workpiece 100.

[0063] This embodiment further provides a method for calibrating the curvature of a curved workpiece. The method uses the aforementioned curvature calibrating device to calibrate the curvature of the curved workpiece 100. The specific steps include:

[0064] Step S1: Compare the arc-shaped workpiece 100 with a standard sample, manually confirm whether the arc-shaped workpiece 100 has convex or concave positions, and mark each position with concave and convex marks;

[0065] Step S2: Correcting each position according to the concave and convex marks. When correcting the convex position of the arc-shaped workpiece 100, the inner surface of the arc-shaped workpiece 100 faces the pressing roller 2, and the outer surface abuts against the two support columns 3. The driving member 1 drives the pressing roller 2 to apply radial pressure to the convex position.

[0066] When the concave position of the arc-shaped workpiece 100 is corrected, the outer surface of the arc-shaped workpiece 100 is made to face the pressing roller 2, and the inner surface is made to abut against the two support columns 3. The driving member 1 drives the pressing roller 2 to apply radial pressure to the concave position;

[0067] Step S3: After the entire arc workpiece 100 is calibrated once, it is compared with the standard sample again. If the inner diameter deviation of a certain part of the arc workpiece 100 is outside the allowable error range, the arc workpiece 100 needs to be calibrated again according to the concave and convex conditions until the error requirements are met.

[0068] In step S1, the actual arc surface 110 of the arc-shaped workpiece 100 is compared with the standard arc surface 120 of the standard sample. Figure 6 As shown, when a certain position of the actual arc surface 110 is convex inward relative to the inner arc surface of the standard arc surface 120, the position is judged to be a convex position, such as Figure 7 As shown, when a certain position of the actual arc surface 110 is concave outward relative to the inner arc surface of the standard arc surface 120, the position is determined to be a concave position. When marking the concave and convex positions at various positions, chalk or marker marks can be made on the inner or outer surface of the arc-shaped workpiece 100, and the concave and convex conditions can be distinguished by using different letters, numbers, or Chinese characters.

[0069] In step S2, specifically, when the convex position of the arc-shaped workpiece 100 is corrected, as shown in FIG. Figure 4As shown, the arc-shaped workpiece 100 is slid between the pressure roller 2 and the two support columns 3 through the roller 51 at the bottom, so that the inner surface of the position marked with the raised mark on the arc-shaped workpiece 100 faces the pressure roller 2, and the outer surface abuts against the two support columns 3. The two support columns 3 support the arc-shaped workpiece 100, and then the pressure roller 2 is driven by the driving member 1 to move toward the arc-shaped workpiece 100. The roller surface of the pressure roller 2 contacts the inner arc surface of the arc-shaped workpiece 100, and a radial pressure away from the center of the arc-shaped workpiece 100 is applied to the tangent point position, causing the raised position to deform. If there are multiple raised marking points on a arc-shaped workpiece 100, the curvature correction is performed on each marking point in turn. When the concave position of the arc-shaped workpiece 100 is calibrated, the placement direction of the arc-shaped workpiece 100 is opposite to that of the convex position. After the arc-shaped workpiece 100 is placed between the pressure roller 2 and the two support columns 3, the outer surface of the position marked with the concave mark on the arc-shaped workpiece 100 faces the pressure roller 2, and the inner surface abuts against the two support columns 3. The two support columns 3 support the arc-shaped workpiece 100, and then the pressure roller 2 is driven by the driving member 1 to move toward the arc-shaped workpiece 100. The roller surface of the pressure roller 2 contacts the outer arc surface of the arc-shaped workpiece 100 and applies a radial pressure toward the center of the arc-shaped workpiece 100 to the tangent point, so that the concave position is deformed. Similarly, if there are multiple concave marking points on a arc-shaped workpiece 100, the arc calibration is performed on each marking point in turn. If there are both convex and concave positions on a arc-shaped workpiece 100, the convex position can be calibrated first and then the concave position by the above method, or the order can be interchanged.

[0070] The arc correction method provided in this embodiment uses the above-mentioned arc correction device to correct the arc of the arc workpiece 100, so that the overall deviation range of its inner diameter can be guaranteed to be around ±1mm, and finally the arc surface meets the requirements of the drawing, thereby improving its assembly fit, and helping to reduce the labor intensity of the operator and improve production efficiency.

[0071] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A radian correction device, characterized in that: include: A driving member (1) and a pressure roller (2), wherein the pressure roller (2) is vertically arranged and connected to the output end of the driving member (1), and the driving member (1) is capable of driving the pressure roller (2) to move along a first direction; Two support columns (3) are arranged at intervals and are arranged parallel to the pressing roller (2); the pressing roller (2) is located on the perpendicular midline of the line connecting the centers of the two support columns (3); and an arc-shaped workpiece (100) is placed between the pressing roller (2) and the two support columns (3); The arc-shaped workpiece (100) has a convex position and / or a concave position, wherein the convex position is a position where the actual arc surface (110) of the arc-shaped workpiece (100) convexes inward relative to the inner arc surface of the standard arc surface (120) of the standard sample, and the concave position is a position where the actual arc surface 110 of the arc-shaped workpiece (100) concave outward relative to the inner arc surface of the standard arc surface (120) of the standard sample. When the arc-shaped workpiece (100) has a convex position, the inner surface of the arc-shaped workpiece (100) faces the pressing roller (2), and the outer surface abuts against the two support columns (3); when the arc-shaped workpiece (100) has a concave position, the outer surface of the arc-shaped workpiece (100) faces the pressing roller (2), and the inner surface abuts against the two support columns (3); The pressure roller (2) comprises a pressure roller body (21) and a first mounting frame (22), wherein the first mounting frame (22) is connected to the output end of the driving member (1), the pressure roller body (21) is a circular tube structure, and the pressure roller body (21) is welded to the first mounting frame (22); The arc correction device further comprises a bracket (4), the bracket (4) comprising an upper end plate (41), a lower end plate (42) and a column (43), the upper end plate (41) and the lower end plate (42) being arranged with a vertical interval, the column (43) being supported between the upper end plate (41) and the lower end plate (42), and the driving member (1) being fixed on the column (43); A first sliding groove (411) is provided on the upper end plate (41), and the first sliding groove (411) extends along the first direction. A first sliding block (221) is provided on the top of the first mounting frame (22), and the first sliding block (221) is inserted into the first sliding groove (411) and can slide along the first sliding groove (411). A first bearing (222) is rotatably provided on the first sliding block (221), and the first bearing (222) is in rolling engagement with the upper surface of the upper end plate (41); The two support columns (3) are respectively a movable support column (31) and a fixed support column (32); the movable support column (31) is fixed on a second mounting frame (33); the second mounting frame (33) is located between the upper end plate (41) and the lower end plate (42), and can drive the movable support column (31) to move relative to the bracket (4); the fixed support column (32) is fixed on a third mounting frame (34); and the third mounting frame (34) is fixed between the upper end plate (41) and the lower end plate (42).

2. The arc correction device according to claim 1, characterized in that: The number of the driving members (1) is set to two, the two driving members (1) are spaced apart in the up-down direction, and the pressing roller (2) is simultaneously connected to the output ends of the two driving members (1).

3. The arc correction device according to claim 1, characterized in that: A second slide groove (412) is provided on the upper end plate (41), and the second slide groove (412) is configured in a bent shape. A second slider (331) is provided on the top of the second mounting frame (33), and the second slider (331) is inserted into the second slide groove (412) and can slide along the second slide groove (412); A second bearing (332) is rotatably provided on the second sliding block (331), and the second bearing (332) is in rolling engagement with the upper surface of the upper end plate (41).

4. The arc correction device according to claim 3, characterized in that: A first limiting block (44), a second limiting block (45) and a third limiting block (46) are provided on the lower end plate (42); the first limiting block (44), the second limiting block (45) and the third limiting block (46) are respectively stopped on three side surfaces of the second mounting frame (33) in different directions, and the third limiting block (46) is detachably connected to the lower end plate (42).

5. The arc correction device according to any one of claims 1 to 4, characterized in that: It also includes two groups of roller assemblies (5), each group of roller assemblies (5) includes a plurality of rotatably arranged rollers (51), and the plurality of rollers (51) in each group are evenly arranged on the pad (6) along a circular direction.

6. A method for radian correction, comprising: using the radian correction device according to any one of claims 1 to 5 to correct the radian of the arc-shaped workpiece (100), wherein: The specific steps include: Step S1: comparing the arc-shaped workpiece (100) with a standard sample, manually confirming whether the arc-shaped workpiece (100) has convex or concave positions, and making concave and convex marks at each position; Step S2: Correcting each position according to the concave and convex marks. When correcting the convex position of the arc-shaped workpiece (100), the inner surface of the arc-shaped workpiece (100) is made to face the pressing roller (2), and the outer surface is made to abut against the two support columns (3). The driving member (1) drives the pressing roller (2) to apply radial pressure to the convex position. When the concave position of the arc-shaped workpiece (100) is corrected, the outer surface of the arc-shaped workpiece (100) is made to face the pressing roller (2), and the inner surface is made to abut against the two support columns (3), and the pressing roller (2) is driven by the driving member (1) to apply radial pressure to the concave position; Step S3: After the entire arc-shaped workpiece (100) is calibrated once, it is compared with the standard sample again. If the inner diameter deviation of a certain part of the arc-shaped workpiece (100) is outside the allowable error range, the arc-shaped workpiece (100) needs to be calibrated again according to the concave and convex conditions until the error requirements are met.

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