CN105880350B - A kind of discontinuous point type blank holder of fine blanking die and its parameters design method - Google Patents
A kind of discontinuous point type blank holder of fine blanking die and its parameters design method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000013461 design Methods 0.000 title claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 41
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Classifications
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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
- B21D28/04—Centering the work; Positioning the tools
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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Abstract
The invention discloses a kind of discontinuous point type blank holder of fine blanking die and its parameters design method, the blank holder includes point type blank holder body, along the uniform one group of raised points of part outline of required fine-punching formation on the lower surface of the point type blank holder body, each raised points are provided with rounding, when the thickness of the part of required fine-punching formation is less than 5mm, the point type blank holder is one side, determines its each technological parameter；When the thickness of the part of required fine-punching formation is more than or equal to 5mm, one group of raised points of origin parameters identical convex with the point type blank holder body are provided with the upper surface of fine blanking die cavity plate, determine its each technological parameter.The present invention is directed to the fine part of different thicknesss of slab, can effectively determine the technological parameter of discontinuous point type blank holder, discontinuous point type blank holder can be widely used in fine, reduces fine blanking die cost, improves piece surface serviceability rate.
Description
Technical field
Present invention relates particularly to a kind of discontinuous point type blank holder of fine blanking die and its parameters design method.
Background technology
Fine is a kind of high-quality, efficient, low consumption forming technique, has been widely used in industry, fine-blanking die
Structure adds blank holder and counter, and have less clearance between punch and die compared with common stamping mould structure.It was punched
Cheng Zhong, blank holder first compress material, and then while punch-pin pushes, counter provides counter-pressure, so that the gold of shear zone
Category is punched in the state of being in three-dimensional Steady-State security, obtains the good blanking part of surface quality.
Blank holder is an indispensable building block in fine blanking die, and the material beyond shear zone can be prevented to rush
Flowed during sanction with punch-pin, while the Steady-State security suffered by material can be increased, improved the plastic deformation ability of material, enter
And improve the cross section quality of part.The blank holder being most widely used at present is V-arrangement blank holder, and its main machining method is electricity fire
Flower processing or numerical control milling shaping, no matter which kind of processing method used, the processing of its V-arrangement stalk is relatively difficult, it is necessary to using high
The CNC milling machine of precision is processed, and can so increase processing cost, and machining accuracy is difficult to ensure that.
The it is proposed of discontinuous point type blank holder can reduce fine blanking die cost, discontinuous point type flanging to a certain extent
The processing of circle is easier, simpler than V-arrangement blank holder in the processing of electrical spark working its tool-electrode of man-hour, it is only necessary to utilize drill bit
A series of hole is bored according to salient point arrangement mode designed on blank holder, processing cost can be reduced.But fine is not
During with part, the parameter of discontinuous point type blank holder this how to choose definition there is presently no system.
The content of the invention
It is an object of the invention to provide a kind of discontinuous point type blank holder of fine blanking die and its parameters design method,
It can determine the spot diameter of discontinuous point type blank holder, institute's rounding angle square is very little on point, point when being punched the part of different-thickness
The distance between point edge, point apart from die point size and point the technological parameter such as height this how to choose, can make
Discontinuous point type blank holder is more efficiently to be applied in fine, so as to reduce fine blanking die cost.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of discontinuous point type blank holder of fine blanking die, the blank holder include point type blank holder body, the point type flanging
Enclose on the lower surface of body along the uniform one group of raised points of part outline of required fine-punching formation, in each raised points
Provided with rounding, when the thickness of the part of required fine-punching formation is less than 5mm, the point type blank holder is one side, adjacent protrusion
The distance between point edge is 0.4~0.5mm, rounding size on the diameters of the raised points, raised points, the raised points center of circle with
The ratio of the distance between blank holder inner ring, the height of raised points and part thickness is respectively 0.3~0.4,0.1~0.15,
0.75~0.85,0.2~0.3；When the thickness of the part of required fine-punching formation is more than or equal to 5mm, in fine blanking die cavity plate
Upper surface is provided with one group of raised points of origin parameters identical convex with the point type blank holder body, adjacent protrusion point edge it
Between distance be 0.4~0.5mm, on the diameters of the raised points, raised points in rounding size, the raised points center of circle and blank holder
The distance between circle, the ratio of the height of raised points and part thickness are respectively 0.3~0.4,0.1~0.5,0.75~0.85,
0.15~0.25.
By above-mentioned technical proposal, when the thickness of the part of required fine-punching formation is less than 5mm, between adjacent protrusion point edge
Distance be 0.45mm, on the diameters of the raised points, raised points between rounding size, the raised points center of circle and blank holder inner ring
Distance, the ratio of the height of raised points and part thickness be respectively 0.35,0.125,0.8,0.25.
By above-mentioned technical proposal, when the thickness of the part of required fine-punching formation is more than or equal to 5mm, adjacent protrusion point edge
The distance between be 0.45mm, rounding size, the raised points center of circle and blank holder inner ring on the diameters of the raised points, raised points
The distance between, the ratio of the height of raised points and part thickness be respectively 0.35,0.125,0.8,0.18.
A kind of design method of the discontinuous point type blank holder technological parameter of fine blanking die, comprises the following steps：
S1, when the thickness of the part of required fine-punching formation is less than 5mm, using the discontinuous point type blank holder of one side, i.e., only
It is to be optimized along the uniform one group of raised points of part outline of required fine-punching formation on the lower surface of point type blank holder body
Technological parameter include the distance between adjacent protrusion point edge, rounding size, raised points in the diameter of raised points, raised points
The distance between the center of circle and blank holder inner ring and the height of raised points：
The optimization of the distance between S101, adjacent protrusion point edge：Its Optimality Criteria is not influence the feelings of difficulty of processing
Under condition, the cross section quality of stamping is improved；In the FEM model of fine blanking die, for different part thickness, from 0~
1mm, interval 0.05mm change the distance between adjacent protrusion point edge on blank holder, observe the cross section quality of stamping, when
When the distance between adjacent protrusion point edge is located at 0.4~0.5mm, the cross section quality of stamping is good, blank holder difficulty of processing
It is low, therefore the distance between adjacent protrusion point edge is 0.4~0.5mm；
S102, the diameter of raised points, the distance between rounding size, the raised points center of circle and blank holder inner ring in raised points
And the optimization of the height of raised points：On the basis of the value of the parameters of the V-arrangement blank holder of corresponding different part thickness, often
Individual optimizing factors carry out value near the parameter of V-arrangement blank holder, by each optimizing factors and adjacent protrusion point edge it
Between the span of distance be divided into 5 horizontal, design the orthogonal test table of five factors and five levels, determine test number (TN) 25 times, it is real
Apply orthogonal test scheme, the surface serviceability rate of the part obtained by each group simulated test is measured, by range analysis method to 25
Group data are handled, and affecting laws of each technological parameter to punching piece surface serviceability rate are obtained, with reference to phase in step S101
The value requirement of the distance between adjacent raised point edge, obtains theoretical best parameter group, analyzes each theoretical best parameter group
Understood with the relation of part thickness of slab, on the diameters of raised points, raised points rounding size, the raised points center of circle and blank holder inner ring it
Between distance, the ratio of the height of raised points and part thickness be respectively 0.3~0.4,0.1~0.15,0.75~0.85,0.2
~0.3；
S2, when the thickness of the part of required fine-punching formation is more than or equal to 5mm, using two-sided discontinuous point type blank holder,
I.e. on the lower surface of point type blank holder body and fine blanking die cavity plate upper surface each along required fine-punching formation part
The uniform one group of raised points of appearance profile, technological parameter to be optimized include the distance between adjacent protrusion point edge, raised points
The height of the distance between rounding size, the raised points center of circle and blank holder inner ring and raised points on diameter, raised points：
The optimization of the distance between S201, adjacent protrusion point edge：Repeat step S101, between adjacent protrusion point edge
Distance is 0.4~0.5mm；
S202, the diameter of raised points, the distance between rounding size, the raised points center of circle and blank holder inner ring in raised points
And the optimization of the height of raised points：Repeat step S102, rounding size, raised null circle on the diameters of raised points, raised points
The ratio of the distance between the heart and blank holder inner ring, the height of raised points and part thickness is respectively 0.3~0.4,0.1~0.5,
0.75~0.85,0.15~0.25.
The beneficial effect comprise that：It is dispersed with point type blank holder provided by the invention along part outline
A series of raised points, plate is compressed by raised points, to prevent the material beyond shear zone in blanking process with punch-pin
Flowing, meanwhile, discontinuous point type blank holder also increases the Steady-State security suffered by material, improves the plastic deformation ability of material
Power, so as to improve the cross section quality of stamping.Influence the technique ginseng that discontinuous point type blank holder acts on during fine
Number has five, and the present invention is directed to the fine part of different thicknesss of slab, can effectively determine the technological parameter of discontinuous point type blank holder,
Discontinuous point type blank holder can be widely used in fine, reduce fine blanking die cost, improve piece surface serviceability rate.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the front view of the embodiment of the present invention；
Fig. 2 is the top view of the embodiment of the present invention；
Fig. 3 is the graphics of the embodiment of the present invention；
Fig. 4 is the structural representation using the fine blanking die of the present invention；
Fig. 5 is the part obtained using the fine blanking die fine of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in Figure 1-Figure 3, the discontinuous point type blank holder of a kind of fine blanking die, the blank holder include point type blank holder sheet
Body, along the uniform one group of raised points of part outline of required fine-punching formation on the lower surface of point type blank holder body, each
Raised points are provided with rounding, and when the thickness of the part of required fine-punching formation is less than 5mm, point type blank holder is one side, adjacent
The distance between raised point edge b is 0.4~0.5mm, rounding size r, raised points on the diameter of phi d of raised points, raised points
The distance between the center of circle and blank holder inner ring a, the height h of raised points and the ratio of part thickness is respectively 0.3~0.4,0.1~
0.15th, 0.75~0.85,0.2~0.3；It is recessed in fine blanking die when the thickness of the part of required fine-punching formation is more than or equal to 5mm
The upper surface of mould is provided with one group of raised points of origin parameters identical convex with point type blank holder body, adjacent protrusion point edge it
Between distance b be 0.4~0.5mm, rounding size r, the raised points center of circle and blank holder on the diameter of phi d of raised points, raised points
The distance between inner ring a, the height h of raised points and part thickness ratio is respectively 0.3~0.4,0.1~0.5,0.75~
0.85th, 0.15~0.25.
In a preferred embodiment of the invention, when the thickness of the part of required fine-punching formation is less than 5mm, adjacent protrusion point
The distance between edge is 0.45mm, rounding size, the raised points center of circle and blank holder inner ring on the diameters of raised points, raised points
The distance between, the ratio of the height of raised points and part thickness be respectively 0.35,0.125,0.8,0.25.
In a preferred embodiment of the invention, it is adjacent convex when the thickness of the part of required fine-punching formation is more than or equal to 5mm
It is 0.45mm to play the distance between point edge, rounding size, the raised points center of circle and blank holder on the diameters of raised points, raised points
The ratio of the distance between inner ring, the height of raised points and part thickness is respectively 0.35,0.125,0.8,0.18.
A kind of design method of the discontinuous point type blank holder technological parameter of fine blanking die, comprises the following steps：
S1, when the thickness of the part of required fine-punching formation is less than 5mm, using the discontinuous point type blank holder of one side, i.e., only
It is to be optimized along the uniform one group of raised points of part outline of required fine-punching formation on the lower surface of point type blank holder body
Technological parameter include the distance between adjacent protrusion point edge, rounding size, raised points in the diameter of raised points, raised points
The distance between the center of circle and blank holder inner ring and the height of raised points：
The optimization of the distance between S101, adjacent protrusion point edge：Its Optimality Criteria is not influence the feelings of difficulty of processing
Under condition, the cross section quality of stamping is improved；In the FEM model of fine blanking die, for different part thickness, from 0~
1mm, interval 0.05mm change the distance between adjacent protrusion point edge on blank holder, observe the cross section quality of stamping, when
When the distance between adjacent protrusion point edge is located at 0.4~0.5mm, the cross section quality of stamping is good, blank holder difficulty of processing
It is low, therefore the distance between adjacent protrusion point edge is 0.4~0.5mm；
S102, the diameter of raised points, the distance between rounding size, the raised points center of circle and blank holder inner ring in raised points
And the optimization of the height of raised points：On the basis of the value of the parameters of the V-arrangement blank holder of corresponding different part thickness, often
Individual optimizing factors carry out value near the parameter of V-arrangement blank holder, by each optimizing factors and adjacent protrusion point edge it
Between the span of distance be divided into 5 horizontal, design the orthogonal test table of five factors and five levels, determine test number (TN) 25 times, it is real
Apply orthogonal test scheme, the surface serviceability rate of the part obtained by each group simulated test is measured, by range analysis method to 25
Group data are handled, and affecting laws of each technological parameter to punching piece surface serviceability rate are obtained, with reference to phase in step S101
The value requirement of the distance between adjacent raised point edge, obtains theoretical best parameter group, analyzes each theoretical best parameter group
Understood with the relation of part thickness of slab, on the diameters of raised points, raised points rounding size, the raised points center of circle and blank holder inner ring it
Between distance, the ratio of the height of raised points and part thickness be respectively 0.3~0.4,0.1~0.15,0.75~0.85,0.2
~0.3；
S2, when the thickness of the part of required fine-punching formation is more than or equal to 5mm, using two-sided discontinuous point type blank holder,
I.e. on the lower surface of point type blank holder body and fine blanking die cavity plate upper surface each along required fine-punching formation part
The uniform one group of raised points of appearance profile, technological parameter to be optimized include the distance between adjacent protrusion point edge, raised points
The height of the distance between rounding size, the raised points center of circle and blank holder inner ring and raised points on diameter, raised points：
The optimization of the distance between S201, adjacent protrusion point edge：Repeat step S101, between adjacent protrusion point edge
Distance is 0.4~0.5mm；
S202, the diameter of raised points, the distance between rounding size, the raised points center of circle and blank holder inner ring in raised points
And the optimization of the height of raised points：Repeat step S102, rounding size, raised null circle on the diameters of raised points, raised points
The ratio of the distance between the heart and blank holder inner ring, the height of raised points and part thickness is respectively 0.3~0.4,0.1~0.5,
0.75~0.85,0.15~0.25.
The specific design method of the present invention, comprises the following steps：
S1, when the thickness ratio of stamping relatively thin (being less than 5mm), using the discontinuous point type blank holder of one side, influence to join
Number mainly have the distance between adjacent protrusion point edge, the diameter of raised points, rounding size in raised points, the raised points center of circle with
The height of the distance between blank holder inner ring and raised points；
S101, first the technological parameter of the discontinuous point type blank holder for the part for being punched thickness of slab 4mm is studied, because mesh
Preceding application blank holder the most universal is V-arrangement blank holder, and the technological parameter of V-arrangement blank holder mainly has blank holder height, blank holder
Position and V-arrangement stalk angle, the usual value of angle of V-arrangement stalk is 450, and the selection of other technological parameters is relevant with thickness of slab, and 4mm is
The critical thickness of slab value that V-arrangement blank holder is chosen, when the thickness of slab of stamping is less than 4mm, is punched using one side V-arrangement blank holder
With regard to the preferable part of surface quality can be obtained, when the thickness of slab of stamping is more than or equal to 4mm, entered using two-sided V-arrangement blank holder
Row punching can just obtain the preferable part of surface quality；
The optimization of the distance between the discontinuous point type blank holder adjacent protrusion point edge of S102, one side：Study the starting stage
The thickness of slab value of selected part is 4mm, and when the thickness of slab of stamping is 4mm, the height that V-arrangement blank holder is obtained according to standard is
0.9mm, V-arrangement blank holder are 3.2mm apart from the size of die point, change the phase of point type blank holder in Deform-3D softwares
The distance between adjacent raised point edge, span is 0~1mm, and discontinuous other technological parameters of point type blank holder of one side are with V
The value of shape blank holder is that standard is chosen, and the diameter of raised points takes 1.4mm, and the height of raised points takes 0.9mm, the raised points center of circle
The distance between blank holder inner ring takes 3.2mm, after rounding size takes 0.4mm, simulation to terminate in raised points, observation punching zero
The surface quality of part, find the distance between adjacent protrusion point edge smaller, the stamping in the presence of point type blank holder
Cross section quality is better, but at the same time, the difficulty of processing of point type blank holder is bigger, and it was found that when between adjacent protrusion point edge
Distance when being less than this scope of 0.4mm~0.5mm, then reduce the distance between adjacent protrusion point edge to fine blanking part surface
The raising of quality influences not being very big, can increase the difficulty of processing of blank holder on the contrary, so considering blank holder to punching zero
The influence of part quality and difficulty of processing, distance between optimal point and point edge is chosen, span is 0.4mm~0.5mm,
During with the value of this scope to be punched other thin plates, it was demonstrated that this value is also equally possible, considers blank holder pair
The influence of stamping quality and difficulty of processing, choose the distance between optimal adjacent protrusion point edge, i.e. 0.45mm；
S103, to punching thickness of slab be 4mm part when, each technological parameter raised points of the discontinuous point type blank holder of one side
Diameter, in raised points between the distance between rounding size, adjacent protrusion point edge, the raised points center of circle and blank holder inner ring
Distance and the height of raised points optimize design, under study for action, the value of these technological parameters is all variate, with V-arrangement
On the basis of the value of blank holder, value is carried out near the parameter of V-arrangement blank holder, selected parameter and level are as shown in table 1；
The discontinuous point type blank holder technological parameter of the one side of table 1 and level
S104, this be the horizontal test problem of 5 factor 5, if to do comprehensive experimental study, it is necessary to will be ground
Each horizontal comprehensive collocation analysis of work of each factor for the discontinuous point type blank holder studied carefully, it is necessary to carry out 55=3125 times
Experiment, the number so tested is excessive, and such requirement is extremely difficult in practical study, so selecting orthogonal examination under study for action
Test to be analyzed and researched to the technological parameter of discontinuous point type blank holder, it is possible to reduce test number (TN), due to this be one 5 because
The horizontal experiment of element 5, so the orthogonal arrage chosen is L25(56), wherein 25 represent to carry out 25 simulated tests, largely
On reduce test number (TN), 5 represent 5 horizontal, and 6 represent 6 factors, and have that 5 factors represent inside 6 factors is non-continuity point
5 technological parameters of formula blank holder, also one is for calculation error, and each combination in orthogonal test is formed non-
Continuous point type blank holder technological parameter, which is imported into software, is simulated, the surface serviceability rate obtained by measurement each group experiment, such as
Shown in table 2；
The orthogonal test analog result of table 2
| Tested number | Surface serviceability rate |
| 1 | 0.87634 |
| 2 | 0.88296 |
| 3 | 0.89728 |
| 4 | 0.88750 |
| 5 | 0.87241 |
| 6 | 0.90308 |
| 7 | 0.89527 |
| 8 | 0.87941 |
| 9 | 0.89357 |
| 10 | 0.90172 |
| 11 | 0.89042 |
| 12 | 0.91154 |
| 13 | 0.92621 |
| 14 | 0.93704 |
| 15 | 0.92143 |
| 16 | 0.88685 |
| 17 | 0.87510 |
| 18 | 0.88643 |
| 19 | 0.88662 |
| 20 | 0.88317 |
| 21 | 0.87439 |
| 22 | 0.84693 |
| 23 | 0.88434 |
| 24 | 0.87625 |
| 25 | 0.87632 |
S105, with the method for range analysis, 25 groups of data for simulating to obtain are handled to more than, and it is discontinuous to obtain one side
The technological parameter of point type blank holder and the technological parameter optimized, is used being punched the affecting laws of piece surface serviceability rate
I corresponding to each technological parameter that range analysis method is calculatedj、Ⅱj、Ⅲj、Ⅳj、Ⅴ1, as shown in table 3；
The range analysis result of calculation of table 3
S106, j=1,2,3,4,5,6, I1、Ⅱ1、Ⅲ1、Ⅳ1With V1Between difference can be regarded as the differences of A factors
The affecting laws for the piece surface serviceability rate that level obtains to last fine-edge blanking, I2、Ⅱ2、Ⅲ2、Ⅳ2With V2Between difference
It can be regarded as the affecting laws for the piece surface serviceability rate that the varying levels of B factors obtains to last fine-edge blanking, I3、Ⅱ3、
Ⅲ3、Ⅳ3With V3Between difference to can be regarded as the piece surface that the varying levels of C factors obtains to last fine-edge blanking complete
The affecting laws of availability ratio, I4、Ⅱ4、Ⅲ4、Ⅳ4With V4Between difference can be regarded as the varying levels of D factors to last accurate
The affecting laws for the piece surface serviceability rate that punching obtains, I5、Ⅱ5、Ⅲ5、Ⅳ5With V5Between difference can be regarded as D factors
The affecting laws of piece surface serviceability rate that are obtained to last fine-edge blanking of varying level, I6、Ⅱ6、Ⅲ6、Ⅳ6With V6Between
Difference reflect error, the error that makes discovery from observation not is very big；
S107, the result to range analysis carry out research and find A3B4C1D3E4For the technological parameter of optimization, but wherein
C factors (the distance between adjacent protrusion point edge) found in research above, its parameter value need consider processing
Difficulty and fine-punching formation part quality, so value is that 0.45mm is suitable herein, if value is 0.25mm, it will cause
The point of EDS maps is excessive on blank holder, increases difficulty of processing, if value is excessive, fine blanking part quality can not reach requirement, institute
Using finally by the most optimized parameter obtained by optimization of orthogonal test as A3B4C2D3E4, i.e. the diameter of raised points is chosen for 1.4mm,
Rounding selection of dimension is that the distance between 0.5mm, adjacent protrusion point edge is chosen for 0.45mm (this value meets in raised points
The span of distance between the point and point edge above studied), the choosing of the distance between the raised points center of circle and blank holder inner ring
It is taken as 3.2mm, the height of raised points is chosen for 1.0mm, wherein the diameter of raised points, rounding size, raised points in raised points
Ratio between the height and thickness of slab of the distance between the center of circle and blank holder inner ring and raised points is respectively 0.35,0.125,
0.8th, 0.25, according to orthogonal test analog study, then the application relied in actual production, process discontinuous point type blank holder
When, the proportionate relationship of blank holder technological parameter be all in following certain limit it is feasible, i.e.,：Diameter diameter/plate of raised points
Thick=0.3~0.4, rounding size/thickness of slab=0.1~0.15 in raised points, between the raised points center of circle and blank holder inner ring
Distance/thickness of slab=0.75~0.85, height/thickness of slab=0.2~0.3 of raised points, is punched in experiment with this proportion
During other thin plates, it was demonstrated that the selection of its parameter is also feasible；
S2, the determination using two-sided discontinuous point type blank holder critical condition, with the increase of stamping thickness of slab, fine mistake
The part quality obtained in journey using the discontinuous point type blank holder of one side does not reach requirement, and above resulting one side is discontinuous for use
The parameter selection rules of point type blank holder are punched the part that thickness of slab is 4mm, 4.5mm, 5mm, 5.5mm respectively, and one side is discontinuous
The technological parameter of point type blank holder is as shown in table 4；
The discontinuous point type blank holder technological parameter of the one side of table 4
S201, with above parameter be punched out come piece surface serviceability rate be respectively 93.88%, 92.25%, 89.81%,
89.23%, it is found that when the thickness of slab of stamping increases to 5mm, be punched using the discontinuous point type blank holder of one side
Resulting piece surface serviceability rate can not reach more than 90%, now need to use two-sided discontinuous point type blank holder to carry out essence
Close punching, the critical thickness of slab value that 5mm then uses for two-sided discontinuous point type blank holder, when the thickness of slab of stamping is less than 5mm,
It is punched using the discontinuous point type blank holder of one side with regard to the preferable part of surface quality can be obtained, when the thickness of slab of stamping is big
When equal to 5mm, the preferable part of surface quality can just be obtained by being punched using two-sided discontinuous point type blank holder；
S202, two-sided discontinuous point type blank holder technological parameter optimization, two-sided discontinuous point type blank holder is except in essence
Have on stamping die blank holder outside a series of raised points, also there is a series of raised points, two-sided non-company on fine blanking die cavity plate
The technological parameter of continuous point type blank holder mainly has the distance between adjacent protrusion point edge, the diameter of raised points, fallen in raised points
The height of the distance between fillet size, the raised points center of circle and blank holder inner ring and raised points, with the discontinuous point type pressure of one side
The design method of flange is the same, and the optimization of the distance between adjacent protrusion point edge needs to consider blank holder to stamping matter
The influence of amount and difficulty of processing, so carrying out single factor analysis to it in Deform-3D, obtained optimization spacing is
0.4~0.5mm, other technological parameters are by selecting suitable orthogonal arrage L25(56), and combine Deform-3D softwares and variance
Analysis optimizes, and determines the relation between each technological parameter and thickness of slab, is then combined with experiment, find they with thickness of slab it
Between ratio range be respectively 0.3~0.4,0.1~0.5,0.75~0.85,0.15~0.25.
The present invention in specific application, as shown in figure 4, fine blanking die include punch-pin 2, cavity plate 4, discontinuous point type blank holder
1st, counter 5 and blank 3, fine obtain straight spur gear part as shown in Figure 5, and the dimensional parameters of gear member are shown in Table 5.
Table 5
| Parameter | Numerical value |
| Number of teeth z | 2 |
| Normal module mn(mm) | 20 |
| Pressure angle α (0) | 20 |
| Facewidth b (mm) | 5 |
The type of discontinuous point type blank holder is determined according to the facewidth of above-mentioned straight spur gear, because the facewidth is 5mm, is reached
The critical condition using two-sided discontinuous point type blank holder has been arrived, therefore two-sided discontinuous point type blank holder is used during fine.
During using two-sided discontinuous point type blank holder, distance considers difficulty of processing and point type pressure between point and point edge
Flange has certain to the influence degree of blanking part cross section quality, value 0.45mm between other technological parameters and the facewidth
Relation, according to this relation, it is determined that two-sided point type blank holder spot diameter during punching straight spur gear, institute's rounding angle square on point
It is very little, point it is as shown in table 6 apart from the size of die point and the height value of point, each parameter value.
Table 6
According to design load, a series of point is processed along tooth profile, that is, forms discontinuous point type blank holder, non-company
Continuous point type blank holder dimensional structure diagram is as shown in Figure 3.
According to above-mentioned process parameters design, simulated by Deform-3D softwares, successfully using discontinuous point type pressure
Flange fine has obtained the preferable straight spur gear of section mass ratio, as shown in Figure 5.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (4)
1. a kind of discontinuous point type blank holder of fine blanking die, the blank holder includes point type blank holder body, the point type blank holder
Along the uniform one group of raised points of part outline of required fine-punching formation on the lower surface of body, each set in the raised points
There is rounding, it is characterised in that when the thickness of the part of required fine-punching formation is less than 5mm, the point type blank holder is one side,
The distance between adjacent protrusion point edge is 0.4~0.5mm on point type blank holder body, is fallen on the diameters of raised points, raised points
The ratio of the distance between radius of corner, the raised points center of circle and blank holder inner ring, the height of raised points and part thickness is respectively
0.3~0.4,0.1~0.15,0.75~0.85,0.2~0.3；When the thickness of the part of required fine-punching formation is more than or equal to 5mm
When, the distance between adjacent protrusion point edge is 0.4~0.5mm on point type blank holder body, on the diameters of raised points, raised points
The ratio difference of the distance between rounding radii, the raised points center of circle and blank holder inner ring, the height of raised points and part thickness
For 0.3~0.4,0.1~0.5,0.75~0.85,0.15~0.25, it is provided with the upper surface of fine blanking die cavity plate and point type
Blank holder body one group of raised points of convex origin parameters identical.
2. blank holder according to claim 1, it is characterised in that when the thickness of the part of required fine-punching formation is less than 5mm
When, the distance between adjacent protrusion point edge is 0.45mm on point type blank holder body, rounding on the diameters of raised points, raised points
The ratio of the distance between angular radius, the raised points center of circle and blank holder inner ring, the height of raised points and part thickness is respectively
0.35、0.125、0.8、0.25。
3. blank holder according to claim 1, it is characterised in that when the thickness of the part of required fine-punching formation is more than or equal to
During 5mm, the distance between adjacent protrusion point edge is 0.45mm on point type blank holder body, on the diameters of raised points, raised points
The ratio difference of the distance between rounding radii, the raised points center of circle and blank holder inner ring, the height of raised points and part thickness
For 0.35,0.125,0.8,0.18.
A kind of 4. design of the discontinuous point type blank holder technological parameter of fine blanking die according to any one of claim 1-3
Method, it is characterised in that comprise the following steps：
S1, when the thickness of the part of required fine-punching formation is less than 5mm, using the discontinuous point type blank holder of one side, i.e., only in point
Along the uniform one group of raised points of part outline of required fine-punching formation, work to be optimized on the lower surface of formula blank holder body
Skill parameter includes rounding radii, the raised points center of circle in the distance between adjacent protrusion point edge, the diameter of raised points, raised points
The height of the distance between blank holder inner ring and raised points：
The optimization of the distance between S101, adjacent protrusion point edge：Its Optimality Criteria be in the case where not influenceing difficulty of processing,
Improve the cross section quality of stamping；In the FEM model of fine blanking die, for different part thickness, from 0~1mm,
It is spaced 0.05mm and changes the distance between adjacent protrusion point edge on blank holder, the cross section quality of stamping is observed, when adjacent
When the distance between raised point edge is located at 0.4~0.5mm, the cross section quality of stamping is good, and blank holder difficulty of processing is low, therefore
The distance between adjacent protrusion point edge is 0.4~0.5mm；
S102, the diameter of raised points, in raised points the distance between rounding radii, the raised points center of circle and blank holder inner ring and
The optimization of the height of raised points：On the basis of the value of the parameters of the V-arrangement blank holder of corresponding different part thickness, Mei Geyou
Change factor carries out value near the parameter of V-arrangement blank holder, by between each optimizing factors and adjacent protrusion point edge
The span of distance is divided into 5 levels, designs the orthogonal test table of five factors and five levels, determines test number (TN) 25 times, real
Apply orthogonal test scheme, the surface serviceability rate of the part obtained by each group simulated test is measured, by range analysis method to 25
Group data are handled, and affecting laws of each technological parameter to punching piece surface serviceability rate are obtained, with reference to phase in step S101
The value requirement of the distance between adjacent raised point edge, obtains theoretical best parameter group, analyzes each theoretical best parameter group
Understood with the relation of part thickness of slab, on the diameters of raised points, raised points rounding radii, the raised points center of circle and blank holder inner ring it
Between distance, the ratio of the height of raised points and part thickness be respectively 0.3~0.4,0.1~0.15,0.75~0.85,0.2
~0.3；
S2, when the thickness of the part of required fine-punching formation is more than or equal to 5mm, using two-sided discontinuous point type blank holder, that is, exist
On the lower surface of point type blank holder body and fine blanking die cavity plate upper surface each along required fine-punching formation External Shape
The uniform one group of raised points of profile, technological parameter to be optimized include the distance between adjacent protrusion point edge, raised points diameter,
The height of the distance between rounding radii, the raised points center of circle and blank holder inner ring and raised points in raised points：
The optimization of the distance between S201, adjacent protrusion point edge：The distance between repeat step S101, adjacent protrusion point edge
For 0.4~0.5mm；
S202, the diameter of raised points, in raised points the distance between rounding radii, the raised points center of circle and blank holder inner ring and
The optimization of the height of raised points：Repeat step S102, rounding radii on the diameters of raised points, raised points, the raised points center of circle with
The ratio of the distance between blank holder inner ring, the height of raised points and part thickness is respectively 0.3~0.4,0.1~0.5,0.75
~0.85,0.15~0.25.
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