CN218191873U - Device for forming large-curvature large-angle bent component - Google Patents
Device for forming large-curvature large-angle bent component Download PDFInfo
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- CN218191873U CN218191873U CN202222401852.4U CN202222401852U CN218191873U CN 218191873 U CN218191873 U CN 218191873U CN 202222401852 U CN202222401852 U CN 202222401852U CN 218191873 U CN218191873 U CN 218191873U
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Abstract
The utility model discloses a device for forming a large-curvature large-angle bending component, which comprises a bending die, a pipe propulsion mechanism, a boosting block, a clamping cushion block and a bending die cushion block; the bending die is a thin plate with a sector structure, the center line of the sector structure is used as a boundary, the front section of the sector structure is a clamping area, and the rear section of the sector structure is a forming area; the clamping block, the clamping cushion block and the bending die cushion block are positioned in the clamping area and are matched with the bending die to clamp the tube blank, the radius R of the sector structure is equal to the curvature radius of the target bending component, a first semicircular groove is formed in the sector along the circumference, the radius of the first semicircular groove is R, and R is the radius of the tube blank; a clamping cushion block and a bending die cushion block are arranged in the clamping area and used for stabilizing a straight line section at the front end of the tube blank when a first section of bending section is formed; the small-sized bending die is used for forming the large-radius large-angle bending component, so that the manufacturing cost of the forming die and the matched structure is greatly saved.
Description
Technical Field
The utility model belongs to the technical field of machining, concretely relates to device of big crooked component of shaping curvature by large angle.
Background
The numerical control bending technology is developed by combining the machine tool industry and the numerical control technology on the basis of the traditional pipe bending technology, is an efficient pipe bending technology, has the advantages of high efficiency, high precision and low forming force, is considered to be a reliable forming technology for forming metal bending components by various pipes and profiles, and plays an important role in the modern pipe bending industry.
However, in general, when a member having a large curvature and a large bending angle is subjected to continuous forming, forming is difficult by the conventional wrap-around technique. Because the mold size of the conventional bending apparatus is small, the bending angle of the member is small in the case where the curvature of the formed bent member is small or a large curvature is satisfied, and both the large curvature and the large angle are difficult to satisfy at the same time. If the method of segmented bending and then tailor welding is adopted, the welded component has more welding lines and poorer forming quality, and cannot meet higher use requirements. If a large-size die is processed according to actual requirements, the processing difficulty and cost of the die are high, and the die does not meet the actual production requirements.
Disclosure of Invention
The utility model discloses to the not enough and around the characteristics that the bend takes shape that prior art exists, provide a device of the big angle bending component of shaping big camber, be applicable to the bending of big curvature radius, big angle bending thin wall component and take shape.
The utility model discloses a realize through following technical scheme:
a device for forming a large-curvature large-angle bending component comprises a bending die 1, a pipe pushing mechanism 3, a boosting block 4, a clamping block 5, a clamping cushion block 6 and a bending die cushion block 7; the bending die 1 is a thin plate with a sector structure, the center line of the sector structure is used as a boundary, the front section of the sector structure is a clamping area, and the rear section of the sector structure is a forming area; the clamping block 5, the clamping cushion block 6 and the bending die cushion block 7 are positioned in the clamping area and are matched with the bending die 1 to clamp the tube blank 2, the radius R of the sector structure is equal to the curvature radius of a target bending component, a first semicircular groove is formed in the sector along the circumference, the radius of the first semicircular groove is R, and R is the radius of the tube blank; and a clamping cushion block 6 and a bending die cushion block 7 are arranged in the clamping area and used for stabilizing the straight line section at the front end of the tube blank when the first section of bending section is formed.
The central angle of the fan-shaped device is 60-90 degrees.
In the device, one side of the clamping block 5, which is matched with the bending die 1, is provided with a second semicircular groove which has the same curvature radius R and the same radius R as the bending die 1, the central angle of the second semicircular groove is theta, and theta is half of the central angle of the bending die 1, so that the clamping block 5 and the bending die 1 can be completely attached together; the radius of a second semicircular groove of the clamping block 5 is r, and r is the radius of the tube blank; the clamping blocks 5 and the bending die 1 can clamp the tube blank 2 together and rotate along the same rotating shaft at the same time, so that the tube blank 2 is ensured to be stably bent in a forming area.
According to the device, one side of the boosting block 4 is provided with a third semicircular groove, the third semicircular groove is formed in one surface facing the tube blank 2, the radius of the third semicircular groove is r, the boosting block 4 feeds in the axial direction while the bending die 1 rotates, and the tube blank 2 is guaranteed to be stably bent in a forming area under the action of the bending die.
In the device, the bending die cushion block 7 is assembled between the first semicircular groove of the bending die 1 and the clamping cushion block 6 and is detachably fixed with the bending die 1, one side of the bending die cushion block 7 matched with the first semicircular groove is formed by a semicircular bulge with a radius r, and one side of the bending die cushion block 7 matched with the clamping cushion block 6 is a fourth semicircular groove with the radius r; correspondingly, a fifth semicircular groove is formed in one side, matched with the bending die cushion block 7, of the clamping cushion block 6, and a space, with the diameter equal to that of the tube blank, formed by the fourth semicircular groove and the fifth semicircular groove can clamp the tube blank; the other side of the clamping cushion block 6 is provided with an arc surface with the same curvature as the second semicircular groove; the arc surface is attached to the second semicircular groove of the clamping block 5 and detachably fixed together;
the device is characterized in that S = S ', S1= S1', S2= S2', S is the farthest distance from a tangent line of a central point of the bending die 1 to the bending die 1, and S' is the horizontal width of the front end of the bending die pad 7. S1 is the difference between the horizontal widths of the front end and the rear end of the clamping block 5, and S2 is the axial length of the clamping block 5; s1 'is the horizontal width of the rear end of the gripping pad 6, and S2' is the axial length of the gripping pad 6.
Compared with the prior art, the utility model has the advantages of it is following:
(1) The small-size bending die is used for forming the large-radius large-angle bending component, so that the manufacturing cost of the forming die and the structure matched with the forming die is greatly saved.
(2) The utility model discloses at centre gripping district installation centre gripping cushion 6, bending die cushion 7, when taking shape first section bending segment, stabilize the straightway of pipe front end, can guarantee steadily to take shape first bending segment.
(3) After the first bending is finished, each formed bent section is continuous and has no straight section in the middle to form a continuous large-forming-angle component, and the curvature radius of the formed component can reach more than 1 m; the bending angle of the bending member may range from 0 to 360 °.
Drawings
FIG. 1 is a schematic view of a bending die;
FIG. 2 is a schematic view of a clamping block;
FIG. 3 is a schematic view of a boost block;
FIG. 4 is a schematic view of a bend die pad;
FIG. 5 is a schematic view of a gripping pad;
FIG. 6 is a schematic view of the beginning of a first segment bend;
FIG. 7 is a schematic view of the end of the first segment of bending;
FIG. 8 is a schematic view of the beginning of the second segment bend;
figure 9 is a schematic view of the curved member after final forming.
In the figure: 1. the pipe bending device comprises a bending die, 2, a pipe blank, 3, a pipe pushing mechanism, 4, a boosting block, 5, a clamping block, 6, a clamping cushion block, 7 and a bending die cushion block;
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
Referring to fig. 1-5, a device for forming a large-curvature large-angle bending component comprises a bending die 1, a pipe pushing mechanism 3, a boosting block 4, a clamping block 5, a clamping cushion block 6 and a bending die cushion block 7; the bending die 1 is a thin plate with a sector structure, the central line of the sector structure is used as a boundary, the front section of the sector structure is a clamping area, and the rear section (the rear section is close to one side of the pipe pushing mechanism 3) is a forming area; the clamping block 5, the clamping cushion block 6 and the bending die cushion block 7 are located in a clamping area and are matched with the bending die 1 to clamp the tube blank 2, the radius R of a fan-shaped structure is equal to the curvature radius of a target bending component, the fan-shaped central angle generally selects the range of 60-90 degrees, materials are saved, the mechanism is convenient to move, a first semicircular groove is arranged on the fan-shaped edge of the circle, the radius of the first semicircular groove is R, and R is the radius of the tube blank. The clamping cushion block 6 and the bending die cushion block 7 are arranged in the clamping area and used for stabilizing the straight line section of the front end of the tube blank when the first bending section is formed so as to stably form the first bending section, so that a straight section is inevitably left at the front end of the bent member after forming;
one side of the clamping block 5, which is matched with the bending die 1, is provided with a second semicircular groove with the same curvature radius R and the same radius R as the bending die 1, the central angle of the second semicircular groove is theta, and theta is half of the central angle of the bending die 1, so that the clamping block 5 and the bending die 1 can be completely attached together. The radius of the second semicircular groove of the clamping block 5 is r, and r is the radius of the tube blank, so that the tube blank 2 can be better clamped. The clamping block 5 and the bending die 1 can clamp the tube blank 2 together and rotate along the same rotating shaft at the same time, so that the tube blank 2 is ensured to be stably bent in a forming area.
One side of the boosting block 4 is provided with a third semicircular groove, the third semicircular groove is formed in one surface facing the tube blank 2, the radius of the third semicircular groove is r, the boosting block 4 can feed along the axial direction while the bending die 1 rotates, and the tube blank 2 can be stably bent in a forming area under the action of the bending die.
The bending die cushion block 7 is assembled between the first semicircular groove of the bending die 1 and the clamping cushion block 6 and is detachably fixed with the bending die 1, one side of the bending die cushion block 7, which is matched with the first semicircular groove, is formed by a semicircular bulge with the radius r, and one side of the bending die cushion block 7, which is matched with the clamping cushion block 6, is provided with a fourth semicircular groove with the radius r; correspondingly, a fifth semicircular groove is formed in one side, matched with the bending die cushion block 7, of the clamping cushion block 6, and a space, with the diameter equal to that of the tube blank, formed by the fourth semicircular groove and the fifth semicircular groove can clamp the tube blank; the other side of the clamping cushion block 6 is provided with an arc surface with the same curvature as the second semicircular groove; the arc surface is attached to the second semicircular groove of the clamping block 5 and detachably fixed together;
referring to fig. 1-5, where the relevant parameters S = S ', S1= S1', S2= S2', S is the farthest distance from the tangent to the center point of the bending die 1 to the bending die 1, and S' is the horizontal width of the front end of the bending die pad 7. S1 is the difference between the horizontal widths of the front and rear ends of the clamp block 5, and S2 is the axial length of the clamp block 5. S1 'is the horizontal width of the rear end of the gripping pad 6, and S2' is the axial length of the gripping pad 6. S = S ', S1= S1', S2= S2', and the semicircular grooves of the two blocks are formed into a circular tubular space to clamp the straight pipe at the front end for stabilizing the bent section at the back when the first bending is performed after the bending die cushion block 7 is jointed with the bending die 1 and the clamping cushion block 6 is jointed with the clamping block 5. After the first bending operation, the two spacer blocks are removed and no longer used, since the just formed bending section can be clamped by the bending die 1 and the clamping block 5 in the clamping area.
After the first bending is finished, each formed bent section is continuous and has no straight section in the middle to form a continuous large-forming-angle component, and the curvature radius of the formed component can reach more than 1 m; the bending angle of the bending member may range from 0 to 360 °.
The bending angle of each bending section is half of the central angle of the bending die.
Example 2
The method for forming the large-curvature large-angle bending component by using the device comprises the following steps:
(1) The bent pipe member formed by the target is subjected to three-dimensional modeling, the curvature radius of the target bent pipe member is 900mm, and the bending angle is 195 degrees. Importing the three-dimensional model data of the target bent pipe component into a numerical control bent pipe system to generate a bent pipe machining instruction code;
(2) Designing and processing a bending die 1 with the curvature radius of 900mm and the circle center angle of 60 degrees and a matched mechanism;
(3) Fixing a bending die cushion block 7 in a clamping area at the front end of a bending die 1, fixing a clamping cushion block 6 on a clamping block 5, and pushing a tube blank 2 to the front end positions of the bending die cushion block 7 and the clamping cushion block 6 by a tube pushing mechanism 3 to be consistent;
(4) As shown in fig. 7, after the bending die 1, the clamping block 5 and the boosting block 4 horizontally move through the sliding rail to press the tube blank 2, the bending die 1 and the clamping block 5 rotate on the same rotating shaft, the single-bending angle θ is half of the central angle of the bending die 1, namely 30 degrees, and the boosting block 4 axially translates along with the tube;
(5) As shown in fig. 8, after the first round bending is finished, the bending die 1, the clamping block 5 and the boosting block 4 move away from the pipe through the slide rail, the bending die 1 and the clamping block 5 return to the horizontal position through the rotation of the rotating shaft, and the bending die cushion block 7 and the clamping cushion block 6 are removed and are not used any more, and from the beginning of the second round bending action, each round bending action is consistent with the first round bending action, except that the bending die cushion block 7 and the clamping cushion block 6 are not involved.
(6) The advancing distance of the pipe in the single complete bending process in the step (4) is
The last section has a bending angle of
The remainder beta of the pressure difference is that the advancing distance of the last section of the pipe is
In the formula: r is the bending radius of the member and is in mm; theta is half of the central angle of the bending die and has a unit of degree; α is the total bend angle of the member in degrees; beta is
The remainder of (c) is in units of "°.
The bending angle α of the component is 195 °, and the single complete bending angle is 30 °, the component needs to go through 6 bending processes of 30 ° and 1 bending process of 15 °, and the component consists of 6 complete bending sections with a length of 471.2mm and 1 bending section with a length of 235.6mm according to the above formula;
(7) And then 5 complete bending operations and 1 incomplete bending operation are completed according to the actual bending angle of the component, and the initial straight line segment is cut by a cutting machine to obtain a final finished product. The measurement shows that the pipe has wall thickness reducing rate of about 12%, cross section varying rate of about 5%, no obvious wrinkle and other faults in the surface and high forming quality.
Example 3
The method for forming the large-curvature large-angle bent component by using the device comprises the following steps:
(1) The bent pipe member formed by the target is subjected to three-dimensional modeling, the curvature radius of the target bent pipe member is 1000mm, and the bending angle is 225 degrees. Importing the three-dimensional model data of the target bent pipe component into a numerical control bent pipe system to generate a bent pipe machining instruction code;
(2) Designing a bending die 1 with the curvature radius of 1000mm and the circle center angle of 60 degrees and a matched mechanism;
(3) Fixing a bending die cushion block 7 in a clamping area at the front end of a bending die 1, fixing a clamping cushion block 6 on a clamping block 5, and pushing a tube blank 2 to the front end positions of the bending die cushion block 7 and the clamping cushion block 6 by a tube pushing mechanism 3 to be consistent;
(4) After the bending die 1, the clamping block 5 and the boosting block 4 horizontally move through the sliding rail to tightly press the tube blank 2, the bending die 1 and the clamping block 5 rotate on the same rotating shaft, the single-bending angle is half of the central angle of the bending die 1, namely 30 degrees, and the boosting block 4 axially translates along with the tube;
(5) As shown in fig. 7, after the first winding in step (4) is finished, the bending die 1, the clamping block 5 and the boosting block 4 move away from the pipe through the sliding rail, the bending die 1 and the clamping block 5 return to the horizontal position through the rotation of the rotating shaft, and the bending die cushion block 7 and the clamping cushion block 6 are removed and are not used any more.
(6) The advancing distance of the pipe in the single complete bending process in the step (4) is
The bending angle of the member is 225 DEG, then the last bending angle is set as
The remainder beta of the pressure difference is that the advancing distance of the last section of the pipe is
In the formula: r is the bending radius of the member and is in mm; theta is half of the central angle of the bending die and has a unit of degree; α is the total bend angle of the member in degrees; beta is
The remainder of (c) is in units of "°.
According to the above formula, the member consists of 7 complete curved segments with a length of 523.6mm and 1 curved segment with a length of 261.8 mm;
(7) And then 6 complete bending operations and 1 incomplete bending operation are completed according to the actual bending angle of the component, and the initial straight line segment is cut by a cutting machine to obtain a final finished product. Through measurement, the wall thickness reduction rate of the pipe fitting is about 13%, the cross section change rate is about 4%, the surface has no obvious defects such as wrinkling and the like, and the forming quality is good.
It will be understood that modifications and variations are possible to those skilled in the art in light of the above teachings and that all such modifications and variations are considered to be within the purview of the invention as set forth in the appended claims.
Claims (6)
1. A device for forming a large-curvature large-angle bending component is characterized by comprising a bending die (1), a pipe pushing mechanism (3), a boosting block (4), a clamping block (5), a clamping cushion block (6) and a bending die cushion block (7); the bending die (1) is a thin plate with a sector structure, the center line of the sector structure is used as a boundary, the front section of the sector structure is a clamping area, and the rear section of the sector structure is a forming area; the clamping block (5), the clamping cushion block (6) and the bending die cushion block (7) are located in the clamping area and are matched with the bending die (1) to clamp the tube blank (2), the radius R of the sector structure is equal to the curvature radius of the target bending component, a first semicircular groove is formed in the sector along the circumference, the radius of the first semicircular groove is R, and R is the radius of the tube blank; and a clamping cushion block (6) and a bending die cushion block (7) are arranged in the clamping area and used for stabilizing the straight line section at the front end of the tube blank when the first section of bending section is formed.
2. The apparatus for forming a large-curvature large-angle curved member according to claim 1, wherein the central angle of the fan-shaped section is 60 ° to 90 °.
3. The device for forming the large-curvature large-angle bending component according to claim 1, wherein a second semicircular groove with the same curvature radius R and the same radius R as the bending die (1) is arranged on one side, matched with the bending die (1), of the clamping block (5), the central angle of the second semicircular groove is theta, theta is half of the central angle of the bending die (1), and the clamping block (5) and the bending die (1) can be completely attached together; the radius of a second semicircular groove of the clamping block (5) is r, and r is the radius of the tube blank; the clamping blocks (5) and the bending die (1) can clamp the tube blank (2) together and rotate along the same rotating shaft at the same time, so that the tube blank (2) is stably bent in a forming area.
4. The device for forming the large-curvature large-angle bending component according to claim 1, characterized in that one side of the boosting block (4) is provided with a third semicircular groove, the third semicircular groove is arranged on the side facing the tube blank (2), the radius of the third semicircular groove is r, and the boosting block (4) is axially fed while the bending die (1) rotates, so that the tube blank (2) is stably bent in a forming area under the action of the bending die.
5. The apparatus for forming a large-curvature large-angle bending member according to claim 1, wherein the bending die pad (7) is fitted between the first semicircular groove of the bending die (1) and the clamping pad (6) and detachably fixed to the bending die (1), the side of the bending die pad (7) fitted to the first semicircular groove is formed by a semicircular projection of radius r, and the side of the bending die pad (7) fitted to the clamping pad (6) is formed by a fourth semicircular groove of radius r; correspondingly, a fifth semicircular groove is formed in one side, matched with the bending die cushion block (7), of the clamping cushion block (6), and a space formed by the fourth semicircular groove and the fifth semicircular groove and having the same diameter as the tube blank can clamp the tube blank; the other side of the clamping cushion block (6) is provided with an arc surface with the same curvature as the second semicircular groove; the arc surface is attached to the second semicircular groove of the clamping block (5) and is detachably fixed together.
6. The apparatus for forming a large-curvature large-angle bending member according to claim 1, wherein S = S ', S1= S1', S2= S2', S being the farthest distance from a tangent line to a center point of the bending die (1) to the bending die (1), and S' being the horizontal width of a front end of a die pad (7) of the bending die; s1 is the difference between the horizontal widths of the front end and the rear end of the clamping block (5), and S2 is the axial length of the clamping block (5); s1 'is the horizontal width of the rear end of the clamping cushion block (6), and S2' is the axial length of the clamping cushion block (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222401852.4U CN218191873U (en) | 2022-09-09 | 2022-09-09 | Device for forming large-curvature large-angle bent component |
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| CN202222401852.4U CN218191873U (en) | 2022-09-09 | 2022-09-09 | Device for forming large-curvature large-angle bent component |
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| CN202222401852.4U Active CN218191873U (en) | 2022-09-09 | 2022-09-09 | Device for forming large-curvature large-angle bent component |
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