CN115382976A - Design method of automobile door hinge reinforcing plate die - Google Patents
Design method of automobile door hinge reinforcing plate die Download PDFInfo
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- CN115382976A CN115382976A CN202210979336.1A CN202210979336A CN115382976A CN 115382976 A CN115382976 A CN 115382976A CN 202210979336 A CN202210979336 A CN 202210979336A CN 115382976 A CN115382976 A CN 115382976A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 37
- 238000013461 design Methods 0.000 title claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims abstract description 110
- 239000002699 waste material Substances 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims description 20
- 230000007547 defect Effects 0.000 claims description 6
- 238000012887 quadratic function Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 25
- 238000009966 trimming Methods 0.000 description 12
- 238000010008 shearing Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000004080 punching Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
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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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a design method of an automobile door hinge reinforcing plate die, aiming at special-shaped waste materials of an automobile door hinge reinforcing plate, the R angle size of a lower die male die insert is increased, the plane width size is reduced, the mounting angle of the male die insert is increased, a uniform section cutting edge is changed into a variable section cutting edge, the R angle size of an upper die female die insert is increased, and the plane width size is reduced, so that the cutting depth of a straight cutting edge and a vertical cutting edge at the special-shaped waste materials is reduced, the cutting state of the vertical cutting edge is changed, the service life of the die is effectively prolonged, the quality of parts is improved, the problem of easy material carrying deformation of the parts is solved, the frequency of burrs is reduced, the production efficiency is improved, and a good application effect is obtained.
Description
Technical Field
The invention belongs to the technical field of automobile production, and relates to a mold structure design method.
Background
The stamping process of the door hinge reinforcing plate part of the automobile comprises 5 working procedures of drawing, trimming and punching, flanging and shaping, trimming and punching, and punching and cutting. At present, in a traditional door hinge reinforcing plate die, in a punching and cutting process, waste materials at the edge of a part need to be cut and trimmed, the cutting of complex special-shaped waste materials at the end of the part often needs two processes of tangent cutting and vertical cutting, after the cutting edge of a male die and a female die is finished and vertical cutting is finished, the incision amount of a tangent working part is too large and often reaches 25-35mm, so that the cutting edge of the male die and the female die is easy to wear; in the cutting process, the cutting surface of the part is in the process of tearing, waste materials at the end of the part are easy to carry, the part is deformed, and the problem cannot be solved even if the die closing height is adjusted; meanwhile, after the waste material is cut off, burrs at the cut-off part are large.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a design method of an automobile door hinge reinforcing plate mold.
The technical scheme of the invention comprises the following steps:
step one, arranging an upper die and a lower die according to the structure and the processing technology of the automobile door hinge reinforcing plate;
step two, arranging a modified male die insert in an inner cavity of an upper die at the special-shaped waste of the automobile door hinge reinforcing plate, wherein the modified male die insert is larger in R-angle size, smaller in plane width size and larger in installation angle compared with a modified front male die insert, and meanwhile, the cutting edge is set to be a variable-section cutting edge;
step three, arranging a modified female die insert in a cavity in the lower die at the special-shaped waste of the automobile door hinge reinforcing plate, wherein the R angle size of the modified female die insert is increased, the plane width size is reduced, and the installation angle is unchanged compared with the front female die insert;
the front-changing convex die insert is designed according to the structure profile modeling of the special-shaped waste, and the front-changing concave die insert is matched with the front-changing convex die insert and the special-shaped waste.
Further, in the second step, the R angle size of the changed rear convex die insert is increased by 1-3mm compared with that of the changed front convex die insert.
Furthermore, in the second step, the planar width of the rear male die insert is changed to a value between six-seventh and seven-eighth of the planar width of the front male die insert.
Furthermore, in the second step, the installation angle of the modified male die insert is increased by F degrees compared with the installation angle of the modified front male die insert, wherein F = (M-N)/2, and the angle of the special-shaped waste material (Y) without strip defects in vertical cutting is (M-N) degrees.
Furthermore, in the second step, the variable cross-section cutting edge of the modified male die insert is defined by a curve of the modified male die insert and a quadratic function curve, wherein the quadratic function is as follows: y =0.0176X 2 -1.4676X+52.367。
Furthermore, in the third step, the R angle size of the modified female die insert is increased by 0.07mm compared with the R angle size of the modified male die insert.
Further, in the third step, the planar width dimension of the modified rear die insert is a value between six-seventh and seven-eighth of the planar width dimension of the modified front die insert.
Compared with the prior art, the invention increases the R angle size of the lower die convex die insert, reduces the plane width size and increases the installation angle of the convex die insert aiming at the special-shaped waste of the automobile door hinge reinforcing plate, simultaneously changes the equal-section cutting edge into the variable-section cutting edge, and simultaneously increases the R angle size of the upper die concave die insert and reduces the plane width size, thereby reducing the cutting depths of the straight cutting edge and the vertical cutting edge of the special-shaped waste, changing the cutting state of the vertical cutting edge, effectively prolonging the service life of the die, improving the part quality, solving the problem of easy material carrying deformation of the part, reducing the occurrence frequency of burrs, improving the production efficiency and obtaining good application effect.
Drawings
FIG. 1 is a schematic view of the machining of a door hinge reinforcement panel part of an automobile.
Fig. 2 is an overall schematic view of the structure of the reinforcing plate die for the automobile door hinge.
Fig. 3 is a schematic structural diagram of a lower die of the automobile door hinge reinforcing plate die.
Fig. 4 is a schematic structural diagram of an upper die of the automobile door hinge reinforcing plate die.
FIG. 5 is a comparison of the lower die of the mold after the male die insert is changed from the front to the back.
FIG. 6 is a diagram of the cutting and trimming process of the front mold.
Fig. 7 is a diagram of the process of cutting and trimming the die after modification.
Wherein: q-waste; y-shaped waste; u-upper die; d, lower die; t1-changing a front convex die insert; t2-modifying the rear terrace die insert; a1, changing a front concave die insert; a2-modifying a rear concave die insert; r1-changing the front R angle; r2-modified R angle; m1-changing the front plane width; m2-the planar width after the change; j1-changing a front cutting edge; j2-changing a rear cutting edge; w1-changing the angle of the front convex die insert; w2-changing the angle of the rear convex die insert.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the embodiments are not limited to the invention, and the advantages of the invention will be understood more clearly by the description. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention. The positional relationships described in the embodiments are all the same as those shown in the drawings, and other portions not described in detail in the embodiments are all the related art.
As shown in fig. 1, in a trimming and punching process of an automobile door hinge reinforcing plate part in a production and processing process, two automobile door hinge reinforcing plate parts are symmetrically distributed and connected through a waste material Q, an end of the automobile door hinge reinforcing plate part often has a special-shaped waste material Y, the waste material Q needs to be cut off in a punching and cutting process, and the special-shaped waste material Y needs to be cut off after being fixed by arranging a male die insert and a female die insert on a die in a matching manner.
As shown in fig. 2-4, internal cavities of the upper die U and the lower die D are arranged according to the structural profiling of the automobile door hinge reinforcing plate, a male die insert is arranged in the internal cavity of the upper die U at the special-shaped waste material Y of the automobile door hinge reinforcing plate, a female die insert is arranged in the internal cavity of the lower die D at the special-shaped waste material Y of the automobile door hinge reinforcing plate, and the external structures of the upper die U and the lower die D are determined according to the processing technology of the automobile door hinge reinforcing plate. It should be noted that the front-modified convex die insert T1 and the rear-modified convex die insert T2 are collectively referred to as a convex die insert, and the mounting positions of the upper die U are the same; the front concave die insert A1 and the rear concave die insert A2 are collectively called as concave die inserts and are arranged at the same position of the lower die D. The front convex die insert T1 is changed according to the structure profiling design of the special-shaped waste Y, and the front concave die insert A1 is changed to be matched with the front convex die insert T1 and the special-shaped waste Y. The existing design of the automobile door hinge reinforcing plate mold belongs to the prior art, and the description is omitted here.
1. Male die insert
A comparison of the front and rear die inserts T1, T2 shown in figure 5 will be described in detail below for the optimization.
(1) The R angle size of the punch insert T2 is increased after the change,
because the automobile door hinge reinforcing plate in the region of the R angle of the male die insert is not assembled with other parts and is not the exposed surface of the automobile door hinge reinforcing plate, the influence of increasing or reducing the size of the R angle on the parts is small within a small range on the basis of not influencing the assembly relation with other parts.
The R angle size of the rear convex die insert T2 is increased by 1-3mm compared with the R angle size of the front convex die insert T1, namely R2= R1+ (1-3) mm, wherein R1 is the front R angle, and R2 is the rear R angle. If the R angle is changed to be 8mm before, the R angle can be changed to be 9-11cm after, and the R angle is determined according to actual production.
(2) Modified male die insert T2 reduction of planar width dimension
The male die insert is provided with a plane, the automobile door hinge reinforcing plate part is positioned by the plane, the width size of the plane is properly reduced, and the positioning precision is not influenced.
The planar width dimension of the rear convex die insert (T2) is changed to be a value between six-seventh and seven-eighth of the planar width dimension of the front convex die insert (T1), namely M2= (6/7) × M1- (7/8) × M1, wherein M1 is the changed planar width; m2 is the changed planar width. If the width of the plane is 22.8mm before the modification, the width of the plane after the modification can be 19.54-19.95mm, which is determined according to actual production.
By reducing the width of the plane and increasing the R angle, the cutting depth of the vertical cutting of the cutting edges of the male die insert and the female die insert in the vertical cutting process can be reduced, and the stress condition is improved, so that the product quality is improved.
(3) The installation angle of the improved male die insert T2 is increased
The installation angle of the male die insert is properly increased within an allowable range, so that the stress condition in the vertical cutting process of the male die insert and the female die insert can be improved, the plane trimming process is changed into a shearing process, the trimming process is finally changed from a tearing process into a shearing process, the product quality is improved, and the part deformation defect is reduced.
Compared with the installation angle of the front convex die insert T1, the installation angle of the rear convex die insert T2 is increased by F degrees, F = (M-N)/2, and the angle of the special-shaped waste material Y without strip defects is (M-N) degrees. Namely W2= W1+ (M-N)/2, wherein W1 is the angle of the front convex die insert; w2 is the angle of the insert of the rear convex die. If the angle of the abnormal waste Y which does not have strip defects is 10-20 degrees, the installation angle of the front convex die insert T1 is 11 degrees, and the installation angle of the rear convex die insert T2 is 16 degrees.
(4) The cutting edge of the modified convex die insert T2 is set as a cutting edge with a variable cross section
The variable cross-section cutting edge mainly changes aiming at the cutting edge of the male die insert which is subjected to vertical shearing more, increases the size of the effective cutting edge of the vertical shearing area and locally strengthens the effective cutting edge, can improve the strength and the service life of the cutting edge of the male die insert, improves the stress condition of the vertical-cutting male and female die insert, and provides convenient conditions for maintenance of the worn male die insert.
The variable cross-section cutting edge of the modified convex die insert T2 is formed by a curve of the modified convex die insert and a curve of a quadratic function, wherein the quadratic function is as follows: y =0.0176X 2 -1.4676X +52.367. If the height of the cutting edge of the front convex die insert T1 is changed to be 8-10mm, the height of the cutting edge with the variable cross section of the rear convex die insert T2 is changed to be 12-15.5mm.
2. Die insert
Correspondingly, in order to match the modified female die insert A2 with the modified male die insert T2 and the special-shaped waste material Y, the modified female die insert A2 is also optimized correspondingly.
(1) The R angle size of the modified female die insert A2 is increased
In order to ensure that the die insert can be matched with the punch insert, the R angle size of the die insert is approximately the same as that of the punch insert.
The R angle size of the changed female die insert A2 is increased compared with the R angle size of the changed front female die insert A1 and the R angle size of the changed rear female die insert A2 is increased by 0.07mm compared with the R angle size of the changed rear male die insert T2 in order to be matched with the changed rear male die insert T2.
(2) The planar width dimension of the modified female die insert A2 is reduced
The planar width dimension of the modified female die insert A2 is a value between six-seventh to seven-eighth of the planar width dimension of the modified front female die insert A1, and is consistent with the planar width dimension of the modified rear male die insert T2.
(3) The installation angle of the modified female die insert A2 is not changed
In order to ensure that the die insert and the punch insert can be matched to form a certain angle, the vertical cutting edge is changed from a parallel cutting edge to a non-parallel cutting edge. The installation angle of the modified female die insert A2 is the same as that of the modified front female die insert A1. If the installation angle of the front female die insert A1 is changed to be 11 degrees, the installation angle of the rear female die insert A2 is also changed to be 11 degrees.
The installation angles of the front-changed convex die insert T1 and the front-changed concave die insert A1 are both 11 degrees, the vertical cutting edges of the front-changed convex die insert T1 and the front-changed concave die insert A1 are parallel cutting edges, and the blanking force is large. The mounting angle of the changed male die insert T2 is 16 degrees, the mounting angle of the changed female die insert A2 is 11 degrees, the vertical cutting edge of the male die insert is a nonparallel cutting edge, the female die is gradually cut along the sharp point in the process of cutting into the male die, the final vertical cutting process is changed from the plane trimming process to the shearing process, the stress state of the male die insert and the female die insert is improved, the cutting and trimming process is changed from the tearing process to the shearing process, the product quality is improved, and the part deformation defect is reduced
Changing the cutting and trimming process of the front mold as shown in FIG. 6, and leaving the cutting edge of the die insert of the mold not in contact with the part in FIG. 6-1; 6-2, the die cavity block is tangent to the cutting edge g-b section and just contacts the part, and the cutting edge a-b section of the vertical cutting does not contact the part at the moment; 6-3, the die cavity plate insert tangent cutting edge cuts into the part about 3mm corresponding to the g-b section, at this time, the a-b section of the tangent cutting edge cuts into only one part of the part, and the part corresponding to the a-b section is not cut off; in the graph of fig. 6-4, the tangential cutting edge of the die insert of the die is cut into the part corresponding to the g-b section of e mm (e =25-35 mm), at the moment, the cutting edge amount of the a-b section of the vertical cutting edge of the die insert along the vertical cutting direction reaches about 1mm, the part corresponding to the a-b section is cut off, and the trimming process of the a-b section is the tearing process, so that the part corresponding to the a-b section has poor section quality, burrs are generated, and the part is easy to deform. The cutting edge of the punch and die which is changed into the front die structure for vertical cutting is designed according to a conventional method, after vertical cutting is finished at the special-shaped waste Y position of the automobile door hinge reinforcing plate, the cut-in amount of a tangent working part is too large and reaches 25-35mm, so that the cutting edge is easy to wear, in the cutting process, the cut surface of a part is torn, the burr of the part is large, and the part is easy to take materials and deform.
Changing the cutting and trimming process of the front mold as shown in FIG. 7, and referring to FIG. 7-1, the cutting edge of the die insert of the mold is not yet in contact with the part; FIG. 7-2, the die insert vertical cutting edge of the die just contacts the part, while the die insert vertical cutting edge corresponding to the a '-b' section just contacts the part at a point, and the tangent cutting edge corresponding to the g '-b' section does not contact the part yet; 7-3, the tangential cutting edge of the die insert of the die corresponds to the g '-b' section of the rigid contact part, at the moment, the a '-b' section of the tangential cutting edge of the die insert of the die is gradually and irregularly cut into the part, and the part corresponds to the a '-b' section and is not cut off; 7-4, the g '-b' section corresponding to the tangent cutting edge of the die insert of the die is cut into the part by 3mm, and at the moment, the part is not completely cut off along the vertical cutting direction by the vertical cutting edge of the die insert corresponding to the a '-b' section; in the figures 7-5, the tangent cutting edge of the die insert of the die is cut into the part by f mm (f =5-10 mm) corresponding to the g-b section, and the vertical cutting edge of the die insert is used for completely cutting the part along the vertical cutting direction corresponding to the a '-b' section. The depth of the edge of the tangent cutting edge of the convex-concave die is 5-10mm after the change, which is much less than the depth of the edge of the tangent cutting edge of the convex-concave die by 25-35mm before the change.
Through the measures, the entering depth of the positive cutting edge is reduced at the special-shaped waste material Y of the automobile door hinge reinforcing plate, the sequence of tangent and vertical cutting is changed, vertical cutting is carried out before tangent, simultaneously, the vertical cutting state is improved, the stress state of the vertical cutting edge is improved by adopting the vertical cutting local sharp point region to firstly cut in and then gradually cutting in other regions, the process belongs to the shearing process, the cutting force and the vertical cutting depth are reduced, the essence of the vertical edge cutting of the product is trimmed from a plane to the shearing process, and the part is cut from being torn off; in addition, the section of the vertical cutting edge of the male die is changed into a variable section, so that the strength and the effective size of the vertical cutting edge are greatly improved, and the service life of the die is prolonged; the quality of the section of the modified part is improved, burrs are reduced, the deformation of the part is eliminated, the cutting force of the convex-concave die insert is reduced, the tangential cutting depth is reduced, and the stress state, the vertical cutting depth and the tangential depth of the cutting edge of the convex-concave die insert are improved; the service life of the die is prolonged, the production efficiency is improved, and the product quality is improved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings and specific examples, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
Claims (7)
1. A design method of an automobile door hinge reinforcing plate die is characterized by comprising the following steps:
step one, arranging an upper die (U) and a lower die (D) according to the structure and the processing technology of the automobile door hinge reinforcing plate;
step two, arranging a rear-modified convex die insert (T2) in a cavity inside an upper die (U) at the special-shaped waste (Y) of the automobile door hinge reinforcing plate, wherein the rear-modified convex die insert (T2) is increased in R-angle size, reduced in plane width size and increased in installation angle compared with a front-modified convex die insert (T1), and meanwhile, the cutting edge is set to be a variable-section cutting edge;
step three, arranging a modified female die insert (A2) in a cavity in the lower die (D) at the special-shaped waste (Y) of the automobile door hinge reinforcing plate, wherein the R angle size of the modified female die insert (A2) is increased, the plane width size is reduced, and the installation angle is unchanged compared with a modified front female die insert (A1);
the front-changing convex die insert (T1) is designed according to the structure profile modeling of the special-shaped waste (Y), and the front-changing concave die insert (A1) is matched with the front-changing convex die insert (T1) and the special-shaped waste (Y).
2. The design method of the automobile door hinge reinforcing plate mold according to claim 1, characterized in that: in the second step, the R angle size of the modified male die insert (T2) is increased by 1-3mm compared with the R angle size of the modified front male die insert (T1).
3. The design method of the automobile door hinge reinforcing plate mold according to claim 2, characterized in that: in the second step, the planar width of the rear male die insert (T2) is changed to be a value between six-seventh and seven-eighth of the planar width of the front male die insert (T1).
4. The design method of an automobile door hinge reinforcing plate die as claimed in claim 3, wherein: in the second step, the installation angle of the modified male die insert (T2) is increased by F degrees compared with the installation angle of the modified front male die insert (T1), wherein F = (M-N)/2, and the angle of the special-shaped waste material (Y) which is not subjected to strip defect is (M-N) degrees.
5. The design method of an automobile door hinge reinforcing plate die as claimed in claim 4, wherein: in the second step, the variable cross-section cutting edge of the modified rear punch insert (T2) is defined by a curve of the modified rear punch insert and a quadratic function curve, wherein the quadratic function is as follows: y =0.0176X 2 -1.4676X+52.367。
6. The method for designing an automobile door hinge reinforcing plate mold according to any one of claims 1 to 5, characterized in that: in the third step, the R angle size of the modified female die insert (A2) is increased by 0.07mm compared with the R angle size of the modified male die insert (T2).
7. The design method of an automobile door hinge reinforcing plate die as claimed in claim 4, wherein: in the third step, the planar width dimension of the rear female die insert (A2) is a value between six-seventh and seven-eighth of the planar width dimension of the front female die insert (A1).
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| CN202210979336.1A CN115382976B (en) | 2022-08-16 | 2022-08-16 | Design method of automobile door hinge reinforcing plate mold |
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| CN202210979336.1A CN115382976B (en) | 2022-08-16 | 2022-08-16 | Design method of automobile door hinge reinforcing plate mold |
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| CN115382976B CN115382976B (en) | 2024-06-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117910147A (en) * | 2024-03-18 | 2024-04-19 | 季华实验室 | Waste discharge structure design method, device, electronic equipment and storage medium |
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