CN112613113A - Method for determining rotary shaft of rotary wedge of stamping die - Google Patents
Method for determining rotary shaft of rotary wedge of stamping die Download PDFInfo
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- CN112613113A CN112613113A CN202011206486.6A CN202011206486A CN112613113A CN 112613113 A CN112613113 A CN 112613113A CN 202011206486 A CN202011206486 A CN 202011206486A CN 112613113 A CN112613113 A CN 112613113A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses a method for determining a rotating shaft of a rotary wedge of a stamping die, and belongs to the technical field of automobile cold stamping dies. The method for determining the rotating shaft of the rotary wedge of the stamping die comprises the following steps: acquiring a first projection set U1 and a second projection set U2 of a rotating shaft of the rotating wedge of which the danger section line is in the danger section; acquiring a third projection set U3 of the rotating shaft of the rotating wedge with the radius of R in the danger section; determining a set of ranges U for the rotational axis of the rotating wedge from the first set of projections U1, the second set of projections U2, and the third set of projections U3; and judging the range of the rotating shaft of the rotating wedge and checking the rotating shaft of the rotating wedge according to the range set U of the rotating shaft of the rotating wedge, and determining the rotating shaft of the rotating wedge. The method for determining the rotating shaft of the rotary wedge of the stamping die is convenient for determining the rotating shaft of the wedge, and has the advantages of short time consumption, low error rate and high working efficiency.
Description
Technical Field
The invention relates to the technical field of automobile cold stamping dies, in particular to a method for determining a rotating shaft of a rotating wedge of a stamping die.
Background
As the automotive industry develops, the design of automotive outer covers increasingly tends to be complex in profile and large in size. Such a part is difficult to be formed in place at one time in stamping production, and a complex side flanging and side forming process is usually required to be adopted in subsequent production. In order to realize such a complicated process, a rotary wedge mechanism is often adopted in the design of a mold structure so as to ensure quality.
However, in the prior art, for determining the rotating shaft of the rotating wedge, the operator mainly tries and checks through experience of the operator, and finally tries to find out a proper rotating shaft position, and it is necessary to perform continuous trial and error, which is troublesome and laborious, and the axis position determination by the trial and error method is difficult, time-consuming and high in error rate.
Disclosure of Invention
The invention provides a method for determining a rotating shaft of a rotary wedge of a stamping die, which solves or partially solves the technical problem that a method for determining the rotating shaft of the rotary wedge is not available in the prior art.
In order to solve the technical problem, the invention provides a method for determining a rotating shaft of a rotating wedge of a stamping die, which comprises the following steps: the method comprises the steps that the convex die surface of a rotary wedge is divided, and the rotary radius R of the rotary wedge, the rotary direction of the rotary wedge, and a dangerous section line related to stamping are obtained; establishing a mathematical model, and acquiring a first projection set U1 and a second projection set U2 of a rotating shaft of a rotating wedge of a dangerous section line in a dangerous section; acquiring a third projection set U3 of the rotating shaft of the rotating wedge with the radius of R in the danger section; determining a set of ranges U for the rotational axis of the rotating wedge from the first set of projections U1, the second set of projections U2, and the third set of projections U3; and judging the range of the rotating shaft of the rotating wedge and checking the rotating shaft of the rotating wedge according to the range set U of the rotating shaft of the rotating wedge, and determining the rotating shaft of the rotating wedge.
Further, the acquiring the dangerous section and the dangerous section line includes: selecting a first dangerous section P1 and a second dangerous section P2 according to the stamping direction of the stamping procedure and the negative angle area of the stamped part; sharpening the round corners of the first dangerous section P1 and the solid section line to obtain a first dangerous section line L1 of the first dangerous section P1; and sharpening the round corners of the second dangerous section P2 and the solid section line to obtain a straight line, so as to obtain a second dangerous section line L2 of the second dangerous section P2.
Further, the acquiring the first projection set U1 of the rotation axis of the rotary wedge of the dangerous section line within the dangerous section includes: in the first dangerous section plane P1, the rotary wedge rotation axis of the first dangerous section line L1 is determined; projecting the first dangerous section line L1 into the first dangerous section plane P1, a first set U1 of projections of the rotational axis of the rotating wedge determining the first dangerous section line L1 at the first dangerous section plane P1; the first set of projections U1 of the rotary wedge rotation axis of the rotary wedge determining the first dangerous section line L1 at the first dangerous section P1 comprises: establishing a rectangular coordinate system by taking the boundary point M as an origin; dividing the first dangerous section line L1 into first dangerous section control lines L1, L2, L3 and L4 by taking an inflection point as a boundary; determining hazard points Q1, Q2, Q3, Q4 on first hazard section control lines l1, l2, l3, l 4; obtaining a normal equation f1(x) of l1 by passing through a point Q1; obtaining a normal equation f2(x) of l2 by passing through a point Q2; obtaining a normal equation f3(x) of l3 by passing through a point Q3; obtaining a normal equation f4(x) of l1 by passing through a point Q4; determining the rotation axes of the rotary wedges of the first dangerous section control lines l1, l2, l3 and l4 in the ranges of u1, u2, u3 and u 4; u1 { (x, y) | y ≧ f1(x) }; u2 { (x, y) | y ≧ f2(x) }; u3 { (x, y) | y ≧ f3(x) }; u4 { (x, y) | y ≧ f4(x) }; the rotation axis of the rotating wedge determining the first dangerous section line L1 lies in the first dangerous section P1 in the range U1U 1U 2U 3U 4.
Further, the acquiring the second projection set U2 of the rotation axis of the rotary wedge of the dangerous section line within the dangerous section includes: in the first dangerous section P1, the rotary wedge rotation axis of the second dangerous section line L2 is determined; projecting the second dangerous section line L2 into the first dangerous section plane P1, a second set U2 of projections of the rotational axis of the rotating wedge determining the second dangerous section line L2 at the first dangerous section plane P1; the second set of projections U2 of the rotary wedge rotation axis of the rotary wedge determining the second dangerous section line L2 at the first dangerous section P1 comprises: establishing a rectangular coordinate system by taking the boundary point M as an origin; dividing the second dangerous section line L2 into second dangerous section control lines L5, L6, L7 and L8 by taking an inflection point as a boundary; determining hazard points Q5, Q6, Q7, Q8 on second hazard cross-section control lines l5, l6, l7, l 8; obtaining a normal equation f5(x) of l5 by passing through a point Q5; obtaining a normal equation f6(x) of l6 by passing through a point Q6; obtaining a normal equation f7(x) of l7 by passing through a point Q7; obtaining a normal equation f8(x) of l8 by passing through a point Q8; determining the rotation axes of the rotary wedges of the second dangerous section control lines l5, l6, l7 and l8 in the ranges u5, u6, u7 and u 8; u5 { (x, y) | y ≧ f5(x) }; u6 { (x, y) | y ≧ f6(x) }; u7 { (x, y) | y ≧ f7(x) }; u8 { (x, y) | y ≧ f8(x) }; the rotation axis of the rotating wedge determining the second dangerous section line L2 is in the range of the first dangerous section P1 to the second projection set U2U 5U 6U 7U 8.
Further, the acquiring a third projection set U3 of the rotation axis of the rotating wedge with the radius R in the danger section includes: determining a farthest point O from the movable punch boundary, projecting the farthest point O into the first hazard section P1; in the first risk section P1, determining a circular equation f9(x) with a radius R centered at the origin O; a projection set U3 { (x, y) | y ═ f9(x) } of the rotational axis of the rotating wedge with R as a radius on the first dangerous section P1.
Further, the acquiring a range set U of the rotation axis of the rotating wedge includes: u1 and U2 and U3.
Further, the determining the range of the rotating wedge axis according to the set U of ranges of rotating wedge axes includes: when in use
Then
When the rotating shaft of the rotating wedge is not released, the process is finished(ii) a When in use
When the rotating shaft is not solved, the rotating shaft of the rotating wedge with the radius of R as the rotating shaft is not solved; ending or reselecting the radius of the axis of rotation R1Obtained with R1A third set of projections U3 of the rotational axis of the rotating wedge of radius within the hazard section; when in use
And if the rotating shaft of the rotating wedge takes R as the radius of the rotating shaft, the rotating shaft of the rotating wedge is determined, and the rotating shaft of the rotating wedge is checked.
Further, the checking of the rotating shaft of the rotating wedge comprises: optionally selecting a point in the set of pivot axes of rotation U through which a pivot axis K of rotation of the rotatable cam is obtained perpendicular to the first hazardous cross-section P1; and (4) taking the rotating shaft K as an axis, rotating along the working direction of the rotating wedge in a three-dimensional space, and checking the whole rotating wedge.
Further, the method further comprises: when the checking of the rotating shaft of the rotating wedge is finished, judging the checking result of the rotating shaft of the rotating wedge; the step of judging the checking result of the rotating shaft of the rotating wedge comprises the following steps: judging whether the rotary wedge is interfered with the shape surface of the part when rotating in the working direction; the interference is avoided, the checking is finished, and the rotating shaft K is a rotating shaft of the rotating wedge; if so, the third risk section Pi at the interference is increased.
Further, the third risk section Pi at the supplementary intervention comprises: a third dangerous section Pi is additionally selected at the interference position; sharpening the rounded corners of the third dangerous section Pi and the section line of the entity, and simplifying the rounded corners into straight lines to obtain a third section line Li of the third dangerous section Pi; in the third dangerous section Pi, the rotation axis of the rotary wedge of the third dangerous section line Li is determined; projecting the third dangerous section line Li into the first dangerous section plane P1, determining a fourth set Ui of projections of the rotary wedge rotary axes of the third dangerous section line Li at the first dangerous section plane P1; said fourth set Ui of projections of the rotation axis of the rotary wedge defining the third dangerous section line Li at the first dangerous section P1 comprises: establishing a rectangular coordinate system by taking the boundary point M as an origin; dividing the third dangerous section line Li into third dangerous section control lines l10, l11, l12 and l13 by taking an inflection point as a boundary; determining hazard points Q10, Q11, Q12, Q13 on first hazard section control lines l10, l11, l12, l 13; obtaining a normal equation f10(x) of l1 by passing through a point Q10; obtaining a normal equation f11(x) of l2 by passing through a point Q11; obtaining a normal equation f12(x) of l3 by passing through a point Q12; obtaining a normal equation f13(x) of l1 by passing through a point Q13; determining the rotation axes of the rotary wedges of the first dangerous section control lines l10, l11, l12 and l13 in the ranges of u10, u11, u12 and u 13; u10 { (x, y) | y ≧ f10(x) }; u11 { (x, y) | y ≧ f11(x) }; u12 { (x, y) | y ≧ f12(x) }; u13 { (x, y) | y ≧ f13(x) }; the rotation axis of the rotating wedge determining the third dangerous section line Li is in the range of the first dangerous section P1 for the fourth projection set Ui u10 u11 u12 u 13.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the rotating radius R of the rotating wedge, the rotating direction of the rotating wedge and the danger section line related to stamping are obtained by dividing the convex die surface of the rotating wedge, so that the range of the movable convex die surface can be selected, the problem is simplified by simplifying the three-dimensional space problem through the danger section and the section line, the problem is solved by establishing a mathematical model and obtaining a first projection set U1 and a second projection set U2 of the rotating shaft of the rotating wedge of the danger section line in the danger section, therefore, the problem is converted into a mathematical solving process, the rotating shaft of the rotating wedge at the moment is simplified into one point in the projection plane, namely, the problem of the set of the point is solved, and the range of the rotating shaft of the rotating wedge in the projection plane is further restricted on a circle with the radius R because the third projection set U3 of the rotating shaft of the rotating wedge with the radius R in the danger section plane is obtained, the set of the rotating shaft of the rotating wedge in the projection plane is further reduced, and the range set U of the rotating shaft of the rotating wedge is determined according to the first projection set U1, the second projection set U2 and the third projection set U3, and the range judgment of the rotating shaft of the rotating wedge and the check of the rotating shaft of the rotating wedge are carried out according to the range set U of the rotating shaft of the rotating wedge, so that the judgment of the existence of the rotating wedge is given, the working efficiency is improved, the correctness of the result of the rotating shaft of the rotating wedge is ensured through the check and the judgment of the rotating wedge, the rotating shaft of the rotating wedge is determined, the rotating shaft of the rotating wedge is convenient to determine, the time consumption is short, the error rate is low, and the working efficiency is high.
Drawings
Fig. 1 is a schematic flow chart of a method for determining a rotating shaft of a rotating wedge of a stamping die according to an embodiment of the present invention;
FIG. 2 is a schematic view of a hazardous cross-section of the method of determining the axis of rotation of the rotary wedge of the stamping die of FIG. 1;
FIG. 3 is a schematic view of a first dangerous section line L1 of the method for determining the rotational axis of the rotary wedge of the press die in FIG. 1;
FIG. 4 is a schematic diagram of a set U of ranges of rotational axis of a rotating wedge for the method of determining rotational axis of a rotating wedge for a stamping die of FIG. 1;
FIG. 5 is a schematic view of a rotating wedge rotating shaft of the method for determining the rotating wedge rotating shaft of the stamping die of FIG. 1;
fig. 6 is a schematic view illustrating a rotary wedge rotary shaft verification in the method for determining a rotary wedge rotary shaft of the stamping die in fig. 1.
Detailed Description
Referring to fig. 1, a method for determining a rotating shaft of a rotating wedge of a stamping die according to an embodiment of the present invention includes the following steps:
step S1, by dividing the punch-shaped surface 1 of the rotary wedge, the rotation radius R of the rotary wedge, the rotation direction of the rotary wedge, and the danger section and danger section line related to punching are obtained.
And step S2, establishing a mathematical model, and acquiring a first projection set U1 and a second projection set U2 of the rotating shaft of the rotating wedge of the dangerous section line in the dangerous section.
In step S3, a third projection set U3 is obtained in the danger section of the rotation axis of the rotating wedge with R as the radius.
In step S4, a set U of ranges for the rotational axis of the rotating wedge is determined according to the first set U1, the second set U2 and the third set U3.
In step S5, the range of the rotating shaft of the rotating wedge is determined and the rotating shaft of the rotating wedge is checked based on the range set U of the rotating shaft of the rotating wedge, and the rotating shaft of the rotating wedge is determined.
In the embodiment of the application, the rotating radius R of the rotating wedge, the rotating direction of the rotating wedge and the danger section line related to stamping are obtained by dividing the convex die surface 1 of the rotating wedge, so that the range of the movable convex die surface can be selected, the problem is simplified by simplifying the three-dimensional space problem through the danger section and the section line, the problem is simplified by establishing a mathematical model and obtaining the first projection set U1 and the second projection set U2 of the rotating shaft of the rotating wedge of the danger section line in the danger section, therefore, the problem is converted into a mathematical solution process, the rotating shaft of the rotating wedge at the moment is simplified into one point in the projection plane, namely, the problem of the set of one point is solved, and the range of the rotating shaft of the rotating wedge in the projection plane is further constrained on a circle with the radius R because the third projection set U3 of the rotating shaft of the rotating wedge with the radius R in the danger section plane is obtained, the set of the rotating shaft of the rotating wedge in the projection plane is further reduced, and the range set U of the rotating shaft of the rotating wedge is determined according to the first projection set U1, the second projection set U2 and the third projection set U3, and the range judgment of the rotating shaft of the rotating wedge and the check of the rotating shaft of the rotating wedge are carried out according to the range set U of the rotating shaft of the rotating wedge, so that the judgment of the existence of the rotating wedge is given, the working efficiency is improved, the correctness of the result of the rotating shaft of the rotating wedge is ensured through the check and the judgment of the rotating wedge, the rotating shaft of the rotating wedge is determined, the rotating shaft of the rotating wedge is convenient to determine, the time consumption is short, the error rate is low, and the working efficiency is high.
Step S1 is described in detail.
And step S11, determining the convex die surface of the rotary wedge, primarily selecting the rotary radius R of the rotary wedge, and determining the rotary direction of the rotary wedge.
And step S12, dividing the surface area of the rotary wedge convex die according to the industrial standard of the stamping process, and primarily selecting the radius R and the rotation direction of the rotary wedge.
Referring to fig. 2, obtaining the dangerous section and the dangerous section line includes the steps of:
and S13, selecting a first dangerous section P1 and a second dangerous section P2 according to the stamping direction of the stamping process and the negative angle area of the stamped part, and converting the three-dimensional problem into a two-dimensional plane problem for convenient processing.
Step S14, the round corners of the first dangerous section P1 and the section line of the solid are sharpened and simplified into straight lines, the first dangerous section line L1 of the first dangerous section P1 is obtained, and the plane curve problem is converted into the plane straight line problem to be convenient to process.
Step S15, the round corners of the second dangerous section P2 and the section line of the solid are sharpened and simplified into straight lines, a second dangerous section line L2 of the second dangerous section P2 is obtained, and the plane curve problem is converted into a plane straight line problem to be convenient to process.
The problem of three-dimensional space is simplified by dangerous sections and section lines.
The first dangerous section P1 and the second dangerous section P2 are two parallel planes, and the rotation axis of the rotary wedge is perpendicular to the dangerous section.
Step S2 is described in detail.
Referring to fig. 3, obtaining a first set of projections U1 of the rotational axis of the rotating wedge with the hazardous section line within the hazardous section includes the steps of:
step S21, in the first dangerous section P1, determining the rotary wedge rotary axis of the first dangerous section line L1;
in step S22, the first dangerous section line L1 is projected into the first dangerous section plane P1, and a first set U1 of projections of the rotational wedge rotational axes of the first dangerous section line L1 at the first dangerous section plane P1 is determined.
Step S22 is described in detail.
The determination of the first set U1 of projections of the rotation axis of the rotary wedge of the first dangerous section line L1 at the first dangerous section P1 comprises the following steps:
step S221, a rectangular coordinate system is established with the boundary point M as the origin.
In step S222, the first dangerous section line L1 is divided into first dangerous section control lines L1, L2, L3, L4 with the inflection point as the boundary.
In step S223, the danger points Q1, Q2, Q3, Q4 on the first danger section control lines l1, l2, l3, l4 are determined.
Step S224, a normal equation f1(x) of l1 is obtained by passing through a point Q1; obtaining a normal equation f2(x) of l2 by passing through a point Q2; obtaining a normal equation f3(x) of l3 by passing through a point Q3; the normal equation f4(x) for l1 is found by passing through the point Q4.
Step S225, the ranges u1, u2, u3 and u4 of the rotating shafts of the rotating wedges of the first dangerous section control lines l1, l2, l3 and l4 are determined.
Step S226, u1 { (x, y) | y ≧ f1(x) }; u2 { (x, y) | y ≧ f2(x) }; u3 { (x, y) | y ≧ f3(x) }; u4 { (x, y) | y ≧ f4(x) }.
In step S227, it is determined that the rotation axes of the rotating wedges of the first dangerous section line L1 are in the range of the first projection set U1 ═ U1 ═ U2 ≈ U3 ≈ U4 at the first dangerous section P1.
Acquiring a second projection set U2 of the rotational axis of the rotating wedge with the dangerous section line within the dangerous section comprises the steps of:
step S23, in the first dangerous section P1, determining the rotary wedge rotary axis of the second dangerous section line L2;
in step S24, the second dangerous section line L2 is projected into the first dangerous section plane P1, and a second set U2 of projections of the rotational wedge axes of rotation of the second dangerous section line L2 on the first dangerous section plane P1 is determined.
Step S24 is described in detail.
The determination of the second set U2 of projections of the rotation axis of the rotary wedge of the second dangerous section line L2 on the first dangerous section plane P1 comprises the following steps:
in step S241, a rectangular coordinate system is established with the boundary point M as the origin.
In step S242, the second dangerous section line L2 is divided into second dangerous section control lines L5, L6, L7, L8 with the inflection point as the boundary.
In step S243, the danger points Q5, Q6, Q7, Q8 on the second dangerous section control lines l5, l6, l7, l8 are determined.
Step S244, the normal equation f5(x) of l5 is obtained by passing through the point Q5; obtaining a normal equation f6(x) of l6 by passing through a point Q6; obtaining a normal equation f7(x) of l7 by passing through a point Q7; the normal equation f8(x) for l8 is found by passing through the point Q8.
In step S245, the ranges u5, u6, u7 and u8 of the rotation axes of the rotating wedges of the second dangerous section control lines l5, l6, l7 and l8 are determined.
Step S246, u5 { (x, y) | y ≧ f5(x) }; u6 { (x, y) | y ≧ f6(x) }; u7 { (x, y) | y ≧ f7(x) }; u8 { (x, y) | y ≧ f8(x) };
in step S247, it is determined that the rotation axis of the rotating wedge of the second dangerous section line L2 is in the range of the first dangerous section P1 at the second projection set U2 ═ U5 ═ U6 ═ U7 ≈ U8.
And converting the problem into a mathematical solving process, wherein the rotating shaft of the rotating wedge at the moment is simplified into one point in a projection plane, namely solving the problem of a set where the point is located.
Step S3 is described in detail.
Acquiring a third set of projections U3 of the rotational axis of the rotating wedge with radius R in the hazard section includes the steps of:
step S31, determining the farthest point O according to the movable punch boundary, projecting the farthest point O into the first hazard section P1.
In step S32, in the first risk section P1, a circular equation f9(x) with a radius R centered at the origin O is determined.
In step S33, the projection set U3 { (x, y) | y ═ f9(x) } on the first dangerous section P1 with the rotating wedge rotating axis with the radius of R as the radius.
The range of the rotating shaft of the rotating wedge in the projection plane is further restricted on a circle with the radius of R, and the collection of the rotating shaft of the rotating wedge in the projection plane is further reduced.
Step S4 is described in detail.
Referring to fig. 4-5, obtaining a set of ranges U for the rotational axis of the rotating wedge comprises:
U＝U1∩U2∩U3。
step S5 is described in detail.
The method for judging the range of the rotating wedge rotating shaft according to the range set U of the rotating wedge rotating shaft comprises the following steps:
step S51, when
Then
And when the rotating shaft of the rotating wedge is not solved, ending.
Step S52, when
When the rotating shaft is not solved, the rotating shaft of the rotating wedge takes R as the radius of the rotating shaft; ending or reselecting the radius of the axis of rotation R1Obtained with R1A third set of projections U3 of the rotational axis of the rotating wedge of radius within the hazard section.
Step S53, when
And if the rotating shaft of the rotating wedge takes R as the radius of the rotating shaft, the rotating shaft of the rotating wedge is determined, and the rotating shaft of the rotating wedge is checked.
A method for judging whether the part has the rotary wedge and further correcting parameters is provided, and the working efficiency is improved.
Referring to fig. 6, the checking of the rotating shaft of the rotating wedge includes the following steps:
step S54, selecting a point in the rotating shaft range set U of the rotating wedge, and obtaining a rotating shaft K of the rotating wedge by the point, wherein the rotating shaft K of the rotating wedge is perpendicular to the first dangerous section P1;
and step S55, rotating along the working direction of the rotating wedge in a three-dimensional space by taking the rotating shaft K as an axis, and checking the whole rotating wedge.
And step S56, when the check of the rotating shaft of the rotating wedge is finished, judging the check result of the rotating wedge rotating shaft.
The method for judging the checking result of the rotating shaft of the rotating wedge comprises the following steps:
in step S561, it is determined whether the rotating wedge interferes with the surface of the part when rotating in the working direction.
Step S562, interference is avoided, checking is finished, and the rotating shaft K is a rotating shaft of the rotating wedge;
in step S563, if there are a plurality of interferences, the third risk section Pi at the interference is compensated.
Step S563 is described in detail.
The compensation of the third risk section Pi at the interference comprises the following steps:
in step S5631, a third risk section Pi is additionally selected at the interference.
Step S5632, the third dangerous section Pi and the solid section line are sharpened to be a straight line to obtain a third section line Li of the third dangerous section Pi.
In step S5633, in the third dangerous section Pi, the rotation axis of the rotary wedge of the third dangerous section line Li is determined.
In step S5634, the third dangerous section line Li is projected into the first dangerous section plane P1, and a fourth projection set Ui of the rotary wedge rotary axes of the third dangerous section line Li at the first dangerous section plane P1 is determined.
Step S5634 is described in detail.
Determining the fourth set Ui of projections of the rotation axis of the rotary wedge of the third dangerous section line Li on the first dangerous section P1 comprises the following steps:
in step S563241, a rectangular coordinate system is established with the boundary point M as the origin.
In step S563262, the third dangerous section line Li is divided into third dangerous section control lines l10, l11, l12, l13 with the inflection point as a boundary.
In step S563243, the risk points Q10, Q11, Q12, Q13 on the first risk section control lines l10, l11, l12, l13 are determined.
Step S56362, the normal equation f10(x) of l1 is obtained by passing through the point Q10; obtaining a normal equation f11(x) of l2 by passing through a point Q11; obtaining a normal equation f12(x) of l3 by passing through a point Q12; the normal equation f13(x) for l1 is found by passing through the point Q13.
In step S5656336, the ranges u10, u11, u12 and u13 of the rotation axes of the rotating wedges in which the first dangerous section control lines l10, l11, l12 and l13 are located are determined.
Step S56563246, u10 { (x, y) | y ≧ f10(x) }; u11 { (x, y) | y ≧ f11(x) }; u12 { (x, y) | y ≧ f12(x) }; u13 { (x, y) | y ≧ f13(x) };
in step S56364, it is determined that the rotation axes of the rotating wedges of the third dangerous section line Li are in the range of the fourth set of projections Ui ═ u10 ═ u11 ≈ u12 ≈ u13 at the first dangerous section P1.
The correctness of the rotating shaft result of the rotating wedge is ensured by checking and judging the rotating wedge; further modifications are given to the rotating wedge rotation of the interference.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for determining a rotating shaft of a rotating wedge of a stamping die is characterized by comprising the following steps:
the method comprises the steps that the convex die surface of a rotary wedge is divided, and the rotary radius R of the rotary wedge, the rotary direction of the rotary wedge, and a dangerous section line related to stamping are obtained;
establishing a mathematical model, and acquiring a first projection set U1 and a second projection set U2 of a rotating shaft of a rotating wedge of a dangerous section line in a dangerous section;
acquiring a third projection set U3 of the rotating shaft of the rotating wedge with the radius of R in the danger section;
determining a set of ranges U for the rotational axis of the rotating wedge from the first set of projections U1, the second set of projections U2, and the third set of projections U3;
and judging the range of the rotating shaft of the rotating wedge and checking the rotating shaft of the rotating wedge according to the range set U of the rotating shaft of the rotating wedge, and determining the rotating shaft of the rotating wedge.
2. The method of claim 1, wherein the obtaining the hazardous section and the hazardous section line comprises:
selecting a first dangerous section P1 and a second dangerous section P2 according to the stamping direction of the stamping procedure and the negative angle area of the stamped part;
sharpening the round corners of the first dangerous section P1 and the solid section line to obtain a first dangerous section line L1 of the first dangerous section P1;
and sharpening the round corners of the second dangerous section P2 and the solid section line to obtain a straight line, so as to obtain a second dangerous section line L2 of the second dangerous section P2.
3. The method for determining the rotary axis of a rotary wedge of a stamping die as claimed in claim 2, wherein said obtaining a first set of projections U1 of the rotary wedge's rotary axis with the dangerous section line within the dangerous section includes:
in the first dangerous section plane P1, the rotary wedge rotation axis of the first dangerous section line L1 is determined;
projecting the first dangerous section line L1 into the first dangerous section plane P1, a first set U1 of projections of the rotational axis of the rotating wedge determining the first dangerous section line L1 at the first dangerous section plane P1;
the first set of projections U1 of the rotary wedge rotation axis of the rotary wedge determining the first dangerous section line L1 at the first dangerous section P1 comprises:
establishing a rectangular coordinate system by taking the boundary point M as an origin;
dividing the first dangerous section line L1 into first dangerous section control lines L1, L2, L3 and L4 by taking an inflection point as a boundary;
determining hazard points Q1, Q2, Q3, Q4 on first hazard section control lines l1, l2, l3, l 4;
obtaining a normal equation f1(x) of l1 by passing through a point Q1;
obtaining a normal equation f2(x) of l2 by passing through a point Q2;
obtaining a normal equation f3(x) of l3 by passing through a point Q3;
obtaining a normal equation f4(x) of l1 by passing through a point Q4;
determining the rotation axes of the rotary wedges of the first dangerous section control lines l1, l2, l3 and l4 in the ranges of u1, u2, u3 and u 4;
u1＝{(x,y)∣y≥f1(x)}；u2＝{(x,y)∣y≥f2(x)}；
u3＝{(x,y)∣y≥f3(x)}；u4＝{(x,y)∣y≥f4(x)}；
the rotation axis of the rotating wedge determining the first dangerous section line L1 lies in the first dangerous section P1 in the range U1U 1U 2U 3U 4.
4. The method for determining the rotary axis of a rotary wedge of a stamping die as claimed in claim 2, wherein said obtaining a second set of projections U2 of the rotary wedge's rotary axis with the dangerous section line within the dangerous section includes:
in the first dangerous section P1, the rotary wedge rotation axis of the second dangerous section line L2 is determined;
projecting the second dangerous section line L2 into the first dangerous section plane P1, a second set U2 of projections of the rotational axis of the rotating wedge determining the second dangerous section line L2 at the first dangerous section plane P1;
said second set of projections U2 of the rotary wedge rotation axis of the determination of the second dangerous section line L2 at the first dangerous section P1 comprises the following steps:
establishing a rectangular coordinate system by taking the boundary point M as an origin;
dividing the second dangerous section line L2 into second dangerous section control lines L5, L6, L7 and L8 by taking an inflection point as a boundary;
determining hazard points Q5, Q6, Q7, Q8 on second hazard cross-section control lines l5, l6, l7, l 8;
obtaining a normal equation f5(x) of l5 by passing through a point Q5;
obtaining a normal equation f6(x) of l6 by passing through a point Q6;
obtaining a normal equation f7(x) of l7 by passing through a point Q7;
obtaining a normal equation f8(x) of l8 by passing through a point Q8;
determining the rotation axes of the rotary wedges of the second dangerous section control lines l5, l6, l7 and l8 in the ranges u5, u6, u7 and u 8;
u5＝{(x,y)∣y≥f5(x)}；u6＝{(x,y)∣y≥f6(x)}；
u7＝{(x,y)∣y≥f7(x)}；u8＝{(x,y)∣y≥f8(x)}；
the rotation axis of the rotating wedge determining the second dangerous section line L2 is in the range of the first dangerous section P1 to the second projection set U2U 5U 6U 7U 8.
5. The method for determining the rotating shaft of the rotary wedge of the stamping die according to claim 2, wherein the obtaining a third projection set U3 of the rotating shaft of the rotary wedge with the radius of R in the danger section includes:
determining a farthest point O from the movable punch boundary, projecting the farthest point O into the first hazard section P1;
in the first risk section P1, determining a circular equation f9(x) with a radius R centered at the origin O;
a projection set U3 { (x, y) | y ═ f9(x) } of the rotational axis of the rotating wedge with R as a radius on the first dangerous section P1.
6. The method according to claim 1, wherein the obtaining a set U of ranges of rotational axis of the rotary wedge comprises:
U＝U1∩U2∩U3。
7. the method for determining the rotational axis of the rotary cam of the press die according to claim 1, wherein the determining the range of the rotational axis of the rotary cam based on the range set U of the rotational axis of the rotary cam includes:
when in use
Then
When the rotating shaft of the rotating wedge is not solved, ending;
when in use
When the rotating shaft is not solved, the rotating shaft of the rotating wedge with the radius of R as the rotating shaft is not solved; ending or reselecting the radius of the axis of rotation R1Obtained with R1A third set of projections U3 of the rotational axis of the rotating wedge of radius within the hazard section;
when in use
And if the rotating shaft of the rotating wedge takes R as the radius of the rotating shaft, the rotating shaft of the rotating wedge is determined, and the rotating shaft of the rotating wedge is checked.
8. The method of claim 2, wherein the checking of the rotational axis of the rotary cam comprises:
optionally selecting a point in the set of pivot axes of rotation U through which a pivot axis K of rotation of the rotatable cam is obtained perpendicular to the first hazardous cross-section P1;
and (4) taking the rotating shaft K as an axis, rotating along the working direction of the rotating wedge in a three-dimensional space, and checking the whole rotating wedge.
9. The method of stamping die rotary wedge rotational axis determination of claim 8, further comprising:
when the checking of the rotating shaft of the rotating wedge is finished, judging the checking result of the rotating shaft of the rotating wedge;
the step of judging the checking result of the rotating shaft of the rotating wedge comprises the following steps:
judging whether the rotary wedge is interfered with the shape surface of the part when rotating in the working direction; the interference is avoided, the checking is finished, and the rotating shaft K is a rotating shaft of the rotating wedge; if so, the third risk section Pi at the interference is increased.
10. The method for determining the rotational axis of a rotary wedge of a press tool as set forth in claim 9, wherein the third risk section Pi at the supplementary interference includes:
a third dangerous section Pi is additionally selected at the interference position;
sharpening the rounded corners of the third dangerous section Pi and the section line of the entity, and simplifying the rounded corners into straight lines to obtain a third section line Li of the third dangerous section Pi;
in the third dangerous section Pi, the rotation axis of the rotary wedge of the third dangerous section line Li is determined;
projecting the third dangerous section line Li into the first dangerous section plane P1, determining a fourth set Ui of projections of the rotary wedge rotary axes of the third dangerous section line Li at the first dangerous section plane P1;
said determination of the fourth set Ui of projections of the rotation axis of the rotary wedge of the third dangerous section line Li on the first dangerous section P1 comprises the following steps:
establishing a rectangular coordinate system by taking the boundary point M as an origin;
dividing the third dangerous section line Li into third dangerous section control lines l10, l11, l12 and l13 by taking an inflection point as a boundary;
determining hazard points Q10, Q11, Q12, Q13 on first hazard section control lines l10, l11, l12, l 13;
obtaining a normal equation f10(x) of l1 by passing through a point Q10;
obtaining a normal equation f11(x) of l2 by passing through a point Q11;
obtaining a normal equation f12(x) of l3 by passing through a point Q12;
obtaining a normal equation f13(x) of l1 by passing through a point Q13;
determining the rotation axes of the rotary wedges of the first dangerous section control lines l10, l11, l12 and l13 in the ranges of u10, u11, u12 and u 13;
u10＝{(x,y)∣y≥f10(x)}；u11＝{(x,y)∣y≥f11(x)}；
u12＝{(x,y)∣y≥f12(x)}；u13＝{(x,y)∣y≥f13(x)}；
the rotation axis of the rotating wedge determining the third dangerous section line Li is in the range of the first dangerous section P1 for the fourth projection set Ui u10 u11 u12 u 13.
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