CN110543681A - accurate construction method for large non-revolving component split type space envelope forming roller - Google Patents
accurate construction method for large non-revolving component split type space envelope forming roller Download PDFInfo
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Abstract
The invention relates to a method for accurately constructing a split space envelope forming roller of a large non-revolving component, which comprises the following steps: s1, determining a coordinate system; s2, determining the initial position of the roller; s3, determining an included angle alpha between the axis of the roller and the xOy plane according to the geometric characteristics of the large non-rotating component; s4, determining the accurate design process of the split space envelope forming roller of the large non-revolving component; and S5, calculating the coordinates of any point of the split space envelope forming roller of the large non-revolving component, and establishing the accurate model of the roller. According to the invention, the large-sized non-rotary component is formed by enveloping two rotary motions, so that the production efficiency is improved, the equipment cost and the production cost are reduced, the roller is accurately designed according to the motion and contact relation between the roller and the large-sized non-rotary component, and the roller is high in design efficiency and precision.
Description
Technical Field
the invention relates to the field of design of large-scale non-revolving component forming dies, in particular to a method for accurately constructing a large-scale non-revolving component split type space envelope forming roller.
background
the large-scale non-rotating component can meet the requirement of equipment at a specific position, and is widely applied to the fields of wind power equipment, aerospace, large ships and the like. Compared with a large rotary member, a large non-rotary member is more difficult to manufacture and process, and is one of the leading issues in equipment manufacture. Conventional manufacturing methods for large non-rotating members are machining methods and integral forging methods. When the large-sized non-rotary member is manufactured by adopting a machining method, the large-sized non-rotary member is irregular in shape and needs to be processed by multi-axis linkage equipment, so that the material utilization rate is low, and the processing cost is high. And the moving path of the cutter is complex, the processing difficulty is high, and the processing efficiency is low. The large-scale non-rotary component formed by adopting the integral forging method can improve the production efficiency and the material utilization rate, but the forming force is large, the requirement on forming equipment is high, the die cavity is complex, and the production cost is high.
The split space envelope forming method is a new method for forming large components, realizes the forming of small-size large components by the roller through the offset of the roller at one side of the restraint roller and the independent movement of the roller and the restraint roller, can greatly reduce the forming force and prolong the service life of a die. The forming process is that the restraint roller drives the blank to rotate around the central shaft, the roller rotates around the axis of the roller and feeds along the axis direction of the restraint roller, and metal flows into a cavity formed by the restraint roller and the roller until the metal is completely filled. For the revolving member, each generatrix of the member is identical, and the roll is obtained by a rotation of the generatrix of the member around the axis of the roll. For non-rotating members, the generatrices of the members are not exactly the same, and the rolls cannot be obtained by simple rotation. Therefore, for the space envelope forming method of the large-sized non-revolving component, the shape of the roller needs to be designed according to the space position relation of the roller and the large-sized non-revolving component in the moving process and the contact condition of the roller and the large-sized non-revolving component, and the shape matching of a cavity formed by the roller and the constraint roller in the moving process and the shape of the component is ensured, so that the split space envelope forming of the large-sized non-revolving component is realized. At present, no report about a construction method of a split space envelope forming roller of a large non-revolving component exists.
Disclosure of Invention
The invention aims to solve the technical problem of providing a precise construction method of a large non-revolving component split type space envelope forming roller, and effectively solving the technical problem of manufacturing the large non-revolving component.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for constructing the accurate construction method of the large-scale non-revolving component split type space envelope forming roller comprises the following steps:
s1, coordinate system determination: the method comprises the steps that the central lines of a plurality of characteristic structures of a large non-rotating component are taken as a z-axis, a coordinate system is established by taking a plane passing through the highest point of the upper surface of the large non-rotating component and perpendicular to the z-axis as an xOy plane, and the intersection point of the xOy plane and the z-axis is taken as an origin O;
s2, determining the initial position of the roller: the roller is positioned on one side of the large-scale non-rotating component, the roller axis is on the xOz plane, and the included angle between the roller axis z1 and the z axis is gamma;
S3, determining an included angle alpha between the roll axis and the xOy plane;
S4, taking any point A0(x, y, z) on the upper surface of the large-sized non-rotating component, enabling the point A0 to rotate around the z axis for a certain angle beta and then reach a point A1(x1, y1, z1) on an xOz plane (positive direction of the x axis), and enabling the point A4 on the roller corresponding to the point A0 to coincide with the point A1 after rotating for a certain angle and enabling the point A0 to coincide with the point A1; to obtain the coordinates of point a4, the following transformation needs to be performed: after the roller rotates around the y-axis by the angle gamma, the axis z1 of the roller is coincident with the z-axis, and the point A1 rotates to the position of the point A2(x2, y2 and z 2); point A3(x3, y3, z3) is obtained from the relationship between the arc length from point a0 to point a1 about the z-axis rotation angle β and the arc length from point a2 to point A3 about the roll axis z1 being equal; after the roller rotates downwards by the angle gamma around the x axis, the axis z1 of the roller returns to the initial position, the point A3 rotates to the position of the point A4(x4, y4 and z4), and the coordinates of the roller point A4 corresponding to any point A0 on the upper surface of the large non-rotating component are obtained;
And S5, calculating the coordinates of any point of the split space envelope forming roller of the large non-revolving component, and establishing the accurate model of the roller.
in the above scheme, in the step S5, the coordinates of the point a1 and the point a2 are obtained as shown in equations (1) and (2):
in the above scheme, in the step S5, the coordinates of the point A3(x3, y3, z3) are obtained as shown in equation (3):
in the above scheme, in the step S5, the coordinates of the point a4 are obtained as shown in equation (4):
Wherein the content of the first and second substances,
in the above scheme, the method for determining the included angle α between the roll axis and the xOy plane in step S3 is as follows:
the axis of the roller is on the xOz plane, the included angle alpha between the axis of the roller and the xOy plane is the included angle between the axis of the roller and the x axis, and gamma + alpha is 90 degrees; according to the geometrical characteristics of the large non-rotating component, when the large non-rotating component is a non-centrosymmetric component, the axis of the conical roller is parallel to the xOy plane, the roller is a cylinder in this case, and one end surface of the roller is on the yOz plane; when the large-sized non-revolving member is a centrosymmetric member, the large-sized non-revolving member is divided into n parts by a central angle theta (n theta is 360 DEG, and n is an integer), and each part is centrosymmetric, namely the shape of the member after rotating around the central axis theta is completely the same as that of the initial position; in the case, the conical roller can be obtained by the surface point coordinate transformation of m centrosymmetric parts, wherein m is an integer and is more than or equal to 1 and less than or equal to n; when m is n, the axis of the conical roller is parallel to the xOy plane; when m is more than or equal to 1 and less than n, the included angle between the axis of the conical roller and the xOy surface is a cone under the condition that the roller is conical, and the vertex of the roller is on the z axis.
the implementation of the method for accurately constructing the large non-revolving member split type space envelope forming roller has the following beneficial effects:
1. the large-scale non-rotary component is formed by enveloping two rotary motions, so that the near-net forming of the large-scale non-rotary component is realized, the production efficiency is improved, the equipment cost and the production cost are reduced, and meanwhile, the mechanical property and the service life of the large-scale non-rotary component are improved by continuous local plastic deformation.
2. the roller is accurately designed through the movement and contact relation between the roller and the large-sized non-rotating component, and the roller is high in design efficiency and high in precision.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a design principle of a large non-revolving component split type space envelope forming roller;
FIG. 2 is a schematic view of the vertical position of a split space envelope forming roll of a large non-revolving member;
FIG. 3 is a schematic view of a non-rotating member;
Fig. 4 shows a schematic view of the rolls.
Detailed Description
for a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The design principle of the split space envelope forming roller of the large-scale non-revolving component is as follows: the large non-rotating component rotates around the central lines of the characteristic structures under the driving of the constraint roller, the roller rotates around the axis of the roller, and the rotation directions of the large non-rotating component and the roller are the same. Complex features on the rolls are used to form one or more of a plurality of features of large non-rotating components. In the enveloping process, any point on the upper surface of the large-sized non-revolving component rotates by a certain angle to coincide with a point on the corresponding roller, and when the point rotates by a certain angle to move to the coinciding position again, the point on the corresponding roller also moves to the coinciding position.
The invention discloses a method for accurately constructing a large non-revolving component split type space envelope forming roller, which comprises the following steps:
and S1, determining a coordinate system. The central lines of the two pit structures of the large non-rotating member are taken as a z-axis, a coordinate system is established by taking a plane passing through the highest point of the upper surface of the large non-rotating member and perpendicular to the z-axis as an xOy plane, and the intersection point of the xOy plane and the z-axis is taken as an origin O.
And S2, roller initial position. The rolls are located on one side of a large non-rotating member with the roll axes on the xOz plane and the roll axes z1 at an angle y to the z-axis.
s3, determination of the included angle alpha between the roll axis and the xOy plane. The axis of the roller is on the xOz plane, and the included angle alpha between the axis of the roller and the xOy plane is the included angle between the axis of the roller and the x axis. Large non-rotating components have two features, n 2. And taking m as 1, calculating an included angle between the axis of the conical roller and the xOy plane, wherein the roller is a cone under the condition, and the vertex of the roller is on the z axis. The roll axis z1 and z axis are at an angle γ of 90 ° - α of 60 °.
and S4, determining the precise design process of the split space envelope forming roller of the large non-revolving component. Taking any point A0(17.50, 1.24, -1.00) on the upper surface of the large-scale non-rotating component, after the point A0 rotates a certain angle beta around the z axis, the point A0 reaches a point A1(x1, y1, z1) on the xOz plane (positive direction of the x axis), and after the point A4 on the roller corresponding to the point A0 rotates a certain angle, the point A0 is superposed on a point A1. To obtain the coordinates of point a4, the following transformation needs to be performed: after the roll is rotated about the y-axis by an angle γ of 60 °, the axes z1 of the roll and z-axis coincide, and point a1 is rotated to the position of point a2(x2, y2, z2), as shown in fig. 2. Point A3(x3, y3, z3) is found from the relationship between the arc length from point a0 to point a1 about the z-axis rotation angle β and the arc length from point a2 to point A3 about the roll axis z1 being equal. After the roll is rotated down the x-axis by the angle γ, the axis z1 of the roll returns to the initial position, and point A3 rotates to the position of point a4(x4, y4, z4) to obtain the coordinates of roll point a4 corresponding to any point a0 on the upper surface of the large non-rotating member.
And S5, calculating the coordinates of any point of the split space envelope forming roller of the large non-revolving component. According to the rotational relationship in step S4, the coordinates of the point a1 and the point a2 are as shown in equation (1):
from the arc length equality relationship in step S4, the coordinates of the point A3(x3, y3, z3) are obtained as shown in equation (3):
According to the rotational relationship in step S4, the coordinates of the point a4 are as shown in equation (4):
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A method for accurately constructing a large non-revolving component split type space envelope forming roller is characterized by comprising the following steps:
s1, coordinate system determination: the method comprises the steps that the central lines of a plurality of characteristic structures of a large non-rotating component are taken as a z-axis, a coordinate system is established by taking a plane passing through the highest point of the upper surface of the large non-rotating component and perpendicular to the z-axis as an xOy plane, and the intersection point of the xOy plane and the z-axis is taken as an origin O;
s2, determining the initial position of the roller: the roller is positioned on one side of the large-scale non-rotating component, the roller axis is on the xOz plane, and the included angle between the roller axis z1 and the z axis is gamma;
S3, determining the included angle alpha between the roll axis and the xOy plane:
s4, taking any point A0(x, y, z) on the upper surface of the large-sized non-rotating component, enabling the point A0 to rotate around the z axis for a certain angle beta and then reach a point A1(x1, y1, z1) on an xOz plane (positive direction of the x axis), and enabling the point A4 on the roller corresponding to the point A0 to coincide with the point A1 after rotating for a certain angle and enabling the point A0 to coincide with the point A1; to obtain the coordinates of point a4, the following transformation needs to be performed: after the roller rotates around the y-axis by the angle gamma, the axis z1 of the roller is coincident with the z-axis, and the point A1 rotates to the position of the point A2(x2, y2 and z 2); point A3(x3, y3, z3) is obtained from the relationship between the arc length from point a0 to point a1 about the z-axis rotation angle β and the arc length from point a2 to point A3 about the roll axis z1 being equal; after the roller rotates downwards by the angle gamma around the x axis, the axis z1 of the roller returns to the initial position, the point A3 rotates to the position of the point A4(x4, y4 and z4), and the coordinates of the roller point A4 corresponding to any point A0 on the upper surface of the large non-rotating component are obtained;
and S5, calculating the coordinates of any point of the split space envelope forming roller of the large non-revolving component, and establishing the accurate model of the roller.
2. The method for accurately constructing a large-sized non-revolving member split-type space envelope-forming roll according to claim 1, wherein the coordinates of the point a1 and the point a2 are obtained in step S5 as shown in equations (1) and (2):
3. The method for accurately constructing a large-sized non-rotating member split type space envelope forming roll according to claim 1, wherein the coordinates of the point A3(x3, y3, z3) obtained in the step S5 are as shown in equation (3):
4. The method for accurately constructing the large-sized non-revolving member split-type space envelope-forming roll according to claim 1, wherein the coordinates of the point a4 obtained in the step S5 are as shown in equation (4):
wherein the content of the first and second substances,
5. The method for accurately constructing the split space envelope forming roller of the large-sized non-revolving member according to claim 1, wherein the method for determining the included angle α between the roller axis and the xOy plane in the step S3 is as follows:
The axis of the roller is on the xOz plane, the included angle alpha between the axis of the roller and the xOy plane is the included angle between the axis of the roller and the x axis, and gamma + alpha is 90 degrees; according to the geometrical characteristics of the large non-rotating component, when the large non-rotating component is a non-centrosymmetric component, the axis of the conical roller is parallel to the xOy plane, the roller is a cylinder in this case, and one end surface of the roller is on the yOz plane; when the large-sized non-revolving member is a centrosymmetric member, the large-sized non-revolving member is divided into n parts by a central angle theta (n theta is 360 DEG, and n is an integer), and each part is centrosymmetric, namely the shape of the member after rotating around the central axis theta is completely the same as that of the initial position; in the case, the conical roller can be obtained by the surface point coordinate transformation of m centrosymmetric parts, wherein m is an integer and is more than or equal to 1 and less than or equal to n; when m is n, the axis of the conical roller is parallel to the xOy plane; when m is more than or equal to 1 and less than n, the included angle between the axis of the conical roller and the xOy surface is a cone under the condition that the roller is conical, and the vertex of the roller is on the z axis.
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| CN110918843A (en) * | 2019-11-26 | 2020-03-27 | 武汉理工大学 | Space envelope forming manufacturing method for thin-wall high-rib radiating component |
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| CN108311545A (en) * | 2018-04-13 | 2018-07-24 | 安徽工业大学 | A kind of y-type rolling mill tandem rolling centering and pass detecting system and method |
| CN109214083A (en) * | 2018-09-03 | 2019-01-15 | 武汉理工大学 | Circular test down space envelope profiled envelope mould method for accurately designing |
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| WO2017024626A1 (en) * | 2015-08-13 | 2017-02-16 | 深圳市华星光电技术有限公司 | Naked-eye 3d imaging method and system |
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| CN109214083A (en) * | 2018-09-03 | 2019-01-15 | 武汉理工大学 | Circular test down space envelope profiled envelope mould method for accurately designing |
Cited By (1)
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| CN110918843A (en) * | 2019-11-26 | 2020-03-27 | 武汉理工大学 | Space envelope forming manufacturing method for thin-wall high-rib radiating component |
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