CN107520322A - Convex, recessed overall mould and mould, system for the microreplicated shaped hole of SG abrasive materials - Google Patents

Abstract

The invention discloses a kind of for the convex of the microreplicated shaped hole of SG abrasive materials, recessed overall mould and mould, system, including four duplicate integral-typed punch devices, four integral-typed punch devices are stitched together to form an entirety, each integral-typed punch device includes a supporting plate, three row's punch members are provided with described supporting plate, first row and the 3rd row's punch member correspond to up and down completely, second row punch member and first row, 3rd row's punch member stagger setting, each punch member of second row is located on the center line of first row or the adjacent punch member of the 3rd row.According to the size of the size of rapidoprint, the design of stock layout and material edge-lapped value, the overall dimensions of mould are devised；Punch-pin is overall structure, and the arrangement of punch-pin cutting edge is arranged according to the design of stock layout.

Description

Convex, recessed overall mould and mould, system for the microreplicated shaped hole of SG abrasive materials

Technical field

The present invention relates to pressure processing field, more particularly to thin plate Process and high form accuracy require punching with it is automatic Feed mechanism and system.

Background technology

A kind of new SG abrasive particle grinding wheels released in recent years on international markets, its grinding performance is between superhard Cubic boron nitride (CBN) emery wheel and common corundum emery wheel between, its processing characteristics and service life will be far above corundum wheel, Moderate cost, but grinding machine is had higher requirements unlike CBN emery wheels, therefore the favor and welcome of users has been obtained, It is expanded day by day using face.It is by the corundum crystal that crystal grain is submicron order, is synthesized using colloidal sol-gel (Sol-Gel) technique And it is sintered be made, because abrasive particle is microstructure, there are many brilliant solution faces, it is only micro- under external force or in dressing and finishing Crystalline substance comes off, and constantly produces sharp cutting edge, and self-sharpening is good, and peeling is less, and the emery wheel made of SG abrasive particles has been widely used In fields such as Aero-Space, automobile, bearing, instrument and meters.

The shape of SG abrasive particles is determined that the processing in micro shaping hole at present is mainly using Laser Processing, electrolysis by its micro shaping hole The processing modes such as processing, electrical discharge machining and wire cutting, processing efficiency is low, is difficult to realize batch production, and the contour shape in hole It is uncontrollable.

Through retrieval, Patent No. ZL20120537260 discloses a kind of method for laser machining profiled holes, is swashed using femtosecond The method in light working special-shaped hole on metal, ensure that the processing of circular hole and profiled holes is located on same station, with high-precision control System support ensure that the positional precision of circular hole in profiled holes hole.Utilize a swinging axle of fine motion two-dimensional stage and five shaft platforms A linear axis carry out motion synthesis, along with the real-time control of laser shutter, by putting into line, line into face, face adult Primitive rule.The invention can accurately control the various special-shaped shapes of laser beam tool sharpening, and process multiple abnormal shapes Kong Shi, precision stability is poor, and processing efficiency is low.

Through retrieval, Patent No. ZL201611148984.3 discloses a kind of micro hole machining method and apparatus, in pipe electricity Pole is connected electrical discharge machining pulse power and Electrolyzed Processing power supply dual power supply with workpieces processing both ends, by controlling electrical discharge machining pulse power And the machined parameters of Electrolyzed Processing power supply realize micro hole electrolysis and the compound controllable processing of electric spark.Single electric spark can be removed Efficiency and machining accuracy when processing recast layer caused by micro hole, burr and improving single Electrolyzed Processing micro hole.The hair It is bright to obtain preferable micro hole machining surface quality, higher processing efficiency and machining accuracy, but batch can not be realized Production and the form accuracy for ensureing micropore.

Through retrieval, Patent No. ZL2005100464238 discloses a kind of group act on sets electrical discharge machining of large quantity micropore Process and device, single electrode is installed respectively in many V-grooves for processing on storehouse and V-groove is determined by being positioned in V-groove Position storehouse is installed on spiral adjustment side trench structure, forms the method for adjustment of group act on sets and group act on sets needed for group's hole machined, group's electricity The other end connecting machine tool main shaft of pole.The batch production of micro hole is realized in the invention, but when this method is for group's hole machined, part The damage of electrode, influence the precision stability of group hole machined.

Through retrieval, Patent No. ZL2012105247533 disclose a kind of micro hole plasma discharge processing unit (plant) and Processing method, micro hole is carried out using the discharge plasma space formed between minute diameter electrode and micro hole hole wall to be processed Processing.The carbon tetrafluoride gas that the invention uses meets that storage container after high temperature is easy to blast and it causes the works of greenhouse effects With being, it is unfavorable to be brought carbon dioxide to safe operation and environment thousands of times.

A kind of method for being electrolysed the working special-shaped hole of line cutting technology in the prior art, according to metal anode electrochemical dissolution Principle, the processing method by the use of line electrode as tool cathode to workpiece ablation.And line electrode and work are driven by motion platform Part, which does relative motion, realizes that part shapes, the fillet radius for effectively reducing processing pass and the processing effect for improving profiled holes Rate, and when being applied to group's hole machined, its precision stability is poor.

In summary, profile is according to current processing mode, the key issue of the processing microreplicated forming hole of SG abrasive particles Form accuracy, and realize batch production when precision stability, only could further improve SG abrasive particles on this basis The sharpness of cutting edge, realize the uniformity of SG grit sizes.

The content of the invention

The first object of the present invention is that design one kind is applied to the microreplicated shaped hole punch-pin of SG emery wheel abrasive materials, according to workpiece The manufacture of the size and related die of size and related edge-lapped value, have adjusted the distribution situation of punch-pin cutting edge, root The number of punch-pin cutting edge is determined according to the size of blanking pressure and the size of edge-lapped value.

The second object of the present invention is to provide a kind of mould being processed suitable for the microreplicated mould of SG emery wheel abrasive materials and added Work system, according to the size of the size of rapidoprint, the design of stock layout and material edge-lapped value, devise the overall dimensions of mould； Punch-pin is overall structure, and the arrangement of punch-pin cutting edge is arranged according to the design of stock layout.

In order to reach above-mentioned purpose, the invention provides a technical scheme：

One kind provided by the invention is applied to the microreplicated shaped hole punch-pin of SG emery wheel abrasive materials, including four duplicate whole Body formula punch device, four integral-typed punch devices are stitched together to form an entirety, and each integral-typed punch device includes One supporting plate, is provided with three row's punch members in described supporting plate, and first row and the 3rd row's punch member are completely right up and down Should, second row punch member and first row, the 3rd row's punch member stagger setting, each punch member of second row are located at first On the center line of row or the adjacent punch member of the 3rd row.

Further, described supporting plate and described punch member are integral type structure, pass through the side of linear cutter Formula is manufactured.

Further, the punch member is provided with cutting edge；

Present invention also offers one kind to be applied to the microreplicated shaped hole cavity plate of SG emery wheel abrasive materials, including one with it is described convex Hole corresponding to form unit.

Further, the hole step structure in described cavity plate, the diameter of the latter half are more than the diameter of top half, Lower section is provided with relief hole.

Further, described punch member coordinates with described cutting edge double gap.

A kind of overall diel, including described punch-pin and cavity plate.

Further, described overall diel also include upper bolster, die shoe, described upper bolster, die shoe it Between connected by guide column sleeve, a backing plate is installed in described upper bolster bottom, and being provided with one at the top of described backing plate passes through The die shank of cope plate；The bottom of backing plate is provided with punch-pin, and the bottom of punch-pin is provided with stripper, and described stripper passes through spiral shell Bolt is connected with described cope plate, and the shank of bolt between cope plate and stripper is provided with spring；In described lower mould A die block is installed at the top of seat, is provided with a cavity plate at the top of described die block, described cavity plate, recessed Mould fixed plate and die shoe connect into an entirety.

Described die shoe, die block are provided with relief hole corresponding with cavity plate.

Described punch-pin is connected by screw with described backing plate, and described backing plate passes through screw and described upper bolster phase Even.

A kind of full-automatic material-feeding system of processing, including can continuous stamping die and automatic intermittent feeding structure, it is described from Dynamic interval feeding structure for it is described can continuous stamping die feeding, it includes stepper motor, and described stepper motor passes through biography Dynamic device drives four roll shafts to rotate, two of which roll shaft front end setting up and down, and two other roll shaft is setting up and down in rear end； Flitch passes through the top of arrival cavity plate after four roll shafts.

The operation principle of the present invention:

The present invention is fed using full-automatic material-feeding system.Automatic intermittent feeding structure is by stepper motor, belt pulley, tooth Wheel group and roll shaft composition.The system is controlled by PC and operated, it is possible to achieve full-automation processing, forcing press punching course and interval Feeding structure is coordinated by travel switch to be operated.In punching course, feeding and temporary transient positioning action by stepper motor, by pressing Material roller plays Sheet metal development and keeps straight effect, after plate is transported among mould, is played by stripper solid Fixed board material and the effect of positioning, ensure the precision of punching.When plate is transported to specified location, mould is supplied to by forcing press Pressure.Holding pad is moved down first, pushes down plate, fixes plate, and then punch-pin moves down, and plate is punched.Punching terminates Afterwards, punch-pin is first retracted, and by the effect of holding pad, separates punch-pin and plate.The discharge that plate under punching is fallen into below cavity plate Kong Zhong, one time blanking process terminates, and then stepper motor carries out feeding again, repeats blanking process.Until punching press is completed.

The present invention has advantages below：

(1) pattern type of efficiently micro hole punching press provided by the invention, is directed to micro hole punch process problem.Solve The problems such as punch and matrix cutting edge spacing is too small, be difficult to ensure that form accuracy, mould processing difficulties, design side provided by the invention Case can be amplified by spacing and the change of relevant parameter, so as to be adapted with various sizes, variously-shaped blanking part.Punching The form accuracy of part is high, cost is relatively low, easily realizes that automated production, production efficiency are high, processing uniformity is good.

(2) modularization punch structure provided by the invention, it is easy to process, remained to after abrasion keep machining accuracy, can be effective Solve the fixation of punch-pin and orientation problem during Process punching press, improved while work piece form and dimensional precision is ensured Production efficiency, and modular construction is easily changed, intensity is high, and precision stability is good.

(3) automatic stamping feed system provided by the invention, simple in construction, PC control accuracies are high, can be achieved full-automatic Punching press.

Brief description of the drawings

The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.

Fig. 1 stock layout Local maps；

Fig. 2 stock layout overall diagrams；

Fig. 3 work flow schematic diagrames；

The microreplicated shaped hole mould axonometric drawing of Fig. 4 SG abrasive particles；

The microreplicated shaped hole die cut view of Fig. 5 SG abrasive particles；

Fig. 6 Fig. 7 Fig. 8 die punch sectional views；

Fig. 9 Figure 10 Figure 11 female die of die sectional views；

The stroke curve figure of blanking pressure and punch-pin when Figure 12 is punched；

Figure 13 blade clearances schematic diagram；

The instantaneous state figure cracked in Figure 14 blanking process；

Punch and matrix Blade dimensions, tolerance and the relation of blanking part size and its tolerance when Figure 15, Figure 16 blanking and punching Figure；

Figure 17 cutting edge of die schematic diagrames；

Wherein, 1- die shanks, 2- upper bolsters, 3- backing plates, 4- guide column sleeves, 5- punch-pin, 6- guide pillars, 7- cavity plates, 8- die shoes, 9- Die block, 10- strippers, 11- backing plate positioning screws, 12- discharging sheet-piles.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Whole description.

In the course of work, among plate first is fixed on into cavity plate, and positioned, after start-up operation, be fixed on convex Mould is punched to plate, and the waste material in cavity plate falls into lower section with material guide hole and is collected.The plate on punch-pin exists simultaneously Original position is dropped back into the presence of stripper, one time blanking process terminates, and then plate is fed again in the presence of feeding device 60mm, above-mentioned blanking process is repeated, until process terminates.Because the size of punch-pin is smaller, so stripper has simultaneously Protect punch-pin and the effect being oriented to.In order to facilitate replacing, the solid punch by punch design into four split types, material selects cold Make mould steel (C_r12MoV), each fixed by screw, position finger setting.Strip width is 300mm, thickness 0.5mm, material Matter is 304 stainless steels, it is desirable to which the chamfering that punching production goes out is small as far as possible, therefore blanking part precision takes IT8 levels, Making mold precision Take IT6~IT7 levels.According to what is edited by Chen Yansi《Diel application manual》Understand, the scrap (bridge) a of processing stainless steel 304₁≥ 2.8mm, pressure boundary values are 6mm,.Because material thickness is 0.5mm, therefore the surface roughness R of the section of blanking part_aTake 3.2 μ m.The critical shape of punching is the equilateral triangle that the length of side is 3mm, and processing difficulties are to make the fillet of workpiece after processing as far as possible It is small.Each punching number is 176, is computed the consumption of one pieceStock utilization isFrom 63 tons of crank presses.

Gap width Z：

In formula：Z-double-faced clearance value, mm；

T-sheet thickness, mm；

h₀- when cracking punch-pin press-in material depth, mm；

- when cracking punch-pin press-in material relative depth, mm；

The angle of β-shear fracture line and vertical line, °.

From formula (1-1) as can be seen that rational gap width Z and material thickness t, relative compression distanceCut direction of check (angle) β is relevant.Andβ is again relevant with the property of material, therefore the principal element for influenceing gap width is the property and material of material Expect thickness, because stainless steel 304 belongs to mild steel, and t=0.5mm is less than 1mm, so

The size of punch-pin determines the size in aperture during punching, perforating die using punch-pin as design basis.First determine punch-pin Blade dimensions, the Blade dimensions of cavity plate are determined further according to gap width.Because punch and matrix occurs that abrasion is existing in use As the cutting edge abrasion of punch-pin can make punching aperture size diminish, and the abrasion of cutting edge of die can increase the size of blank.Therefore set When counting this mould, the basic size of punch-pin Blade dimensions should take the size as larger as possible within the margin of tolerance.Thus It can guarantee that punch and matrix remains able to be punched out qualified workpiece within a period of time that is worn.

This mold design is because the limitation of processing technology is so the method that selection punch-pin is individually processed with cavity plate.Processing During mould, the Blade dimensions and tolerance of punch-pin and cavity plate are first marked on pattern, then punch-pin and cavity plate are added according to drawing respectively Work, in order to ensure reasonable gap value, it is necessary to meet following relationship：

T_p+T_d≤Z_max-Z_min (1-2)

Or take T_p=0.4 (Z_max-Z_min) (1-3)

T_d=0.6 (Z_max-Z_min) (1-4)

Perforating die punch-pin cutting edge basic size

Perforating die cutting edge of die basic size

For the punch force calculation of flat sword blanking die：

F=kLt τ_b (1-5)

F-blanking pressure, N in formula；

K-coefficient, typically rule of thumb takes 1.3；

The girth in L-blanking part punching hole, mm；

T-sheet thickness, mm；

τ_b- material shearing strength, MPa.Strength degree of drawing materials σ_b80%, i.e. τ_b=0.8 σ_b。

The Zhou Changwei 9mm in single hole, the tensile strength sigma of stainless steel 304_bFor 520MPa, therefore τ_b=0.8 σ_b=416MPa.

Therefore the blanking pressure rushed needed for single hole is

F=1.3 × 9 × 0.5 × 416=2433.6N

Understand that the sum of one-off hole-piercing is 176 according to stock layout, so total blanking pressure is

F_Always=2433.6 × 176=428313.6N

When designing blanking die and determining punching process parameter, it is contemplated that suitably reduce blanking pressure.If forcing press ton Position does not reach requirement, then should take measures to reduce blanking pressure.The main method for reducing blanking pressure has：

(1) increase blade clearance can reduce blanking pressure, on the premise of ensureing to be punched quality, generally tend to take compared with Big blade clearance reduces blanking pressure, reduces die wear.

(2) it is punched again after material is heated, after heating material, shearing strength can be remarkably decreased, and be raised with temperature, be resisted Cutting intensity gradually reduces, and required blanking pressure also reduces.But heating easily makes material oxidation, influences part accuracy.

(3) it is punched using stepped punch-pin, the extreme value of the blanking pressure of difference punch-pin during punching is occurred in different time, from And reduce total blanking pressure.

(4) declivous cutting edge Dies ' Blanking is used, die point is made and horizontal plane certain angle, reduction section Product, reduce blanking pressure.

When designing blanking die and selection pressing equipment, it is necessary to check the power of forcing press.When the blanking pressure of calculating is big When the nominal pressure of forcing press, some measures can be used to reduce blanking pressure, but being punched work(can't but reduce, therefore may go out Existing forcing press meets the phenomenon that the requirement of blanking pressure is but overloaded in terms of work(is punched, when forcing press overloads in terms of power When, hysteresis phenomenon can be produced, causes the rotating speed of flywheel can drastically reduce, forcing press is overloaded and is damaged.

The punching work(computational methods of flat edge punching：

W-punching work(, J in formula；

F-blanking pressure, N；

T-sheet thickness, mm；

K-coefficient, determined by the property and thickness of material, according to what is edited by Chen Yansi《Diel application manual》, K 0.70, blanking pressure 2433.6N, sheet thickness 0.5mm are taken,

So the punching work(in single hole is

Always punching work(is

W_Always=0.8518 × 176=149.9J

It can thus be seen that punching work(very little, therefore can be without checking computations.

When designing blanking die, it is also necessary to which other power of calculating have stripping force, ejecting force and kicking force.Plate is through overshoot After sanction, due to the elastic deformation of material and the effect of bending springback, the part separated from plate is easily blocked in recessed Within the type mouth of mould, remaining part tightly can be attached on punch-pin, so in order to ensure being smoothed out, it is necessary to apply of following process Material is pushed or ejected by certain power.

(1) stripping force F₁Workpiece or waste material are taken off to required power from punch-pin.

F₁=K₁F (1-7)

(2) ejecting force F₂The power for releasing workpiece or waste material along the direction of blanking pressure out of cavity plate.

F₂=nK₂F (1-8)

(3) kicking force F₃The power for ejecting workpiece or waste material against punching force direction out of cavity plate.

F₃=K₃F (1-9)

Wherein K₁、K₂、K₃Respectively stripping force, ejecting force, head part force coefficient, this secondary design determine to fill using elastic discharging The mode with bottom discharge is put, so total blanking pressure F_ZFor：

F_Z=F+F₁+F₂ (1-10)

Therefore F_Z=428313.6+21415.68+26983.76=476713N

Because this punching is using the production in enormous quantities of self-feeding, institute larger plus the appearance and size of raw material To determine to use open type crank press.Because the blanking pressure of forcing press will remain with sufficient leeway, plus the speed of punching Comparatively fast, thus in blanking process the summation of various power no more than the 70%~80% of forcing press nominal pressure within.According to this The punch force calculation result of secondary calculating, 63 tons of open type crank presses of forcing press model of this diel selection.

According to the characteristics of this punching press, decision uses split type punch-pin, and an entirety is combined into by four pieces of identical punch-pin.Mould Lamps structure and its composition determine the length of punch-pin, length between the processing reconditioning quality of punch-pin, fixed plate and stripper etc. because Element can also influence the length of punch-pin.Punch-pin length not enough can not then insert cutting edge of die and material is punched；It is long can make it is convex Mould job insecurity, is easily damaged.

Either simplex sequence punch-pin length determines formula：

L=H_Gu+H_Unload+H_Lead+Y (1-11)

In formula：L-punch-pin length, mm；

H_Gu- punch retainer thickness, mm；

H_Unload- positive stripper thickness, mm；

H_Lead- side guide plate thickness, mm；

Y-increment, mm (including corresponding processing reconditioning quality, punch-pin are pressed into the distance of cavity plate, punch retainer with discharging Length between plate etc.).

It is computed punch-pin length and takes 25mm.

During punch process, punch-pin bears compression, bears pulling force during discharging, during continuous punching, punch-pin is easy Fatigue rupture, it is small for cutting edge diameter, length length punch-pin, excessive pressure can allow punch-pin longitudinally produce flexural deformation, and because Between asymmetric punching press gap and punch-pin and stamping material the reason for angular deviation, punch-pin can be allowed because by lateral pressure Effect and bend, also result in punch-pin and fracture.Therefore the punch-pin that cutting edge diameter is smaller, length is longer will enter to strength and stability Row school lotus, the specific content that verifies include compression and bending stress.

(1) compression verifies

Maximum crushing stress to punch-pin can not be more than the permissible compression stress of punch-pin, i.e.,：

In formula：P-maximum blanking pressure, N；

F-punch-pin cutting edge sectional area, mm²；

[σ_Pressure]-punch-pin carries out the permissible compression stress after Quenching Treatment, MPa.Knot depending on material, heat treatment and mould Structure, by Chen Yansi chief editors'《Diel application manual》Check in [σ_Pressure]=2000~2200MPa.

By knowing that maximum blanking pressure P is 2433.6N above, punch-pin cutting edge sectional area F is 3.9mm²。SoTherefore safety.

(2) verification of bending stress

The punch-pin of this secondary design has corresponding guider and spring loaded shedder, and at this moment the stress of punch-pin can be considered as one Side stress, the strut device of opposite side twisted branch connection, now punch-pin keep shape will not unstability and the maximum length that bends is L_max, calculated by Euler's formula

Non-circular punch-pin should meet：

In formula：L_max- punch-pin maximum the drift allowed, mm；

The minimum diameter of D-punch-pin, mm；

P-blanking pressure, N；

The moment of inertia of J-punch-pin minimum cross section, mm⁴；Take(a takes 3mm).

It is computedMuch larger than the drift L of this punch-pin_max, so safety.

This punching belongs to high-volume punching process, and the required precision to blanking part is higher, so the design of cavity plate It must is fulfilled for the high requirement of easily manufactured precision.The cutting edge of die of this secondary design does not have gradient, there is fixed height h, cutting edge mill Size will not change after damage, but due to expanding at the material leakage of cutting edge bottom, therefore cavity plate working portion intensity is poor, easily more than accumulation Material, but this kind of punch-pin is applied to the mould that waste material falls along pressing direction, the dimensional accuracy of blanking part is high, easy to make, institute It is general to be of wide application.

Cutting edge straight wall height h is relevant with by slug thickness t, typically takes h≤4mm as t≤1mm, during t ＞ 1mm, take h=4~ 8mm.This stamping material thickness t=0.5mm, it is possible to take t=4mm.According to what is edited by Chen Yansi《Diel practicality hand Volume》Check in die thickness and take 30mm.Because this mould belongs to small-sized cavity plate, wall thickness c=(1.5~2) H (mm), therefore c can take 25mm。

Cavity plate bending resistance calculates：

It is computed σ_{It is curved}=470MPa≤[σ_{It is curved}], so being safe.

Specific structure is as follows：

As shown in Figure 1 and Figure 2, the stock layout is divided into four parts, is partly each long 150mm, wide 30mm.Wherein, each Lower two sides of triangle are in 60 ° and 120 ° with lower boundary.Ensure each triangle by ensureing the depth of parallelism of each parallel lines Form and dimensional precision, and this kind design not only facilitate the manufacture of punch-pin also to meet the edge-lapped value requirement of material.

As shown in figure 3, punching flow is that then mould is punched first by stopping after step motor control feeding 60mm Process, wait after the completion of being punched, discharge waste material, feeding 60mm again is carried out by step motor control, then carries out being punched again Journey, circulated with this, until completing whole process.

As shown in Figure 4, Figure 5, mould integrally forms is fixed on die block 9 for cavity plate 7 by four screws, and by two Long cylinder finger setting, die block 9 are fixed on die shoe by positioning screw, by two long cylinder finger settings.Upper bolster It is connected by guide pillar and guide column sleeve with die shoe, and thereby guarantees that positional precision.Backing plate, fixed and two by four long spiro nails Long cylinder finger setting, punch retainer are fixed by screws on backing plate.Punch-pin is fixed by screws on punch retainer, and Pass through horizontal and vertical straight pin and circular cone finger setting respectively.Stripper is fixed on upper bolster by the guide pillar with spring, And provide stripping force by spring.

The punch-pin as shown in Fig. 6, Fig. 7, Fig. 8 is processed the punch-pin by way of wire cutting can use linear cutter Mode manufactured, first 30 ° are tilted clockwise by mould is overall, after one angle is with certain depth transverse direction wire 6.34mm Cut out, cut again with certain depth after continuing empty wire 2.6mm, wire 6.062mm.Step twice after repeating, again will after cutting Be further continued for above step after 60 ° of punch-pin rotate counterclockwise, after the completion of make mould return just, last horizontal cutting is carried out, by certain Cut out after depth transverse direction wire 6.062mm, incision repetition previous action after empty wire 2.6mm is until process complete convex Mould.Cavity plate is processed guarantee machining accuracy by high-precision laser.

As shown in figure 12, the stroke curve of blanking pressure and punch-pin during punching.AB sections are the elastic deformation stage of punching in figure, Punch-pin starts after meeting with material, and load rises rapidly；The cutting edge of punch-pin enters in plate, after material starts plastic deformation, carries Lotus slowly increases, and such as the BC stages in figure, because punch-pin enters material, the material area for bearing blanking pressure reduces, but material occurs The effect of processing hardening phenomenon has exceeded the effect that area diminishes, and blanking pressure continues to increase, and equal moment is acted on when both, Blanking pressure reaches maximum, i.e., C points in figure.Afterwards, the effect of the diminution of the shear(ing) area of material has exceeded material and processed The effect of hardening, blanking pressure start to reduce.Punch-pin Continued downward motion, the crackle Rapid Expansion of material internal, blanking pressure are quick Reduce, as shown in the CD sections in figure, this section is the fracture stage of punching.

Blade clearance as shown in figure 13 refers to the space between mould convex mould and cutting edge of die.Between punch-pin and cavity plate both sides Gap and referred to as double-faced clearance, represented with Z.

As shown in figure 14, the instantaneous state as cracked in blanking process.This secondary design determines gap using theoretical Method, Main Basiss are to ensure that crackle overlaps up and down, and intersect at straight line, to obtain preferable cross section quality.Blade clearance The cross section quality of blanking, the service life of punch and matrix, blanking pressure etc. are had a very big impact.

Blanking and punch and matrix Blade dimensions during punching as shown in Figure 15, Figure 16, tolerance and blanking part size and its tolerance Relation.

In figure：D_dThe basic size of-cavity die of blanking die cutting edge, mm；

D_PThe basic size of-blanking punch cutting edge, mm；

d_dThe basic size of-perforating die cutting edge of die, mm；

d_pThe basic size of-perforating die punch-pin cutting edge, mm；

D_maxThe maximum limit of size of-blank, mm；

d_minThe minimum limit of size in-punching aperture, mm；

Δ-blanking part tolerance；

Z_minThe two-sided reasonable clearance of-minimum, mm；

Z_maxThe two-sided reasonable clearance of-maximum, mm (are not marked) in figure；

T_d- cutting edge of die manufacturing tolerance；

T_p- punch-pin cutting edge manufacturing tolerance；

K-coefficient；

In order to avoid blanking part size is all inclined to dimension limit, blanking part actual size should be made close to the centre of tolerance range Size.K Distribution values between 0.5~1.0, and it is relevant with the accuracy class of blanking part through consult《Diel practicality hand Volume》, K takes 0.5, minimum two-sided reasonable clearance Z_min0.035mm is taken, blanking part tolerance Δ takes 0.008mm, punch-pin cutting edge manufacture public affairs Poor T_pTake 0.016~0.02mm, cutting edge of die manufacturing tolerance T_dTake 0.02mm.

As shown in figure 17, cutting edge of die of the invention does not have gradient, has fixed height h, size will not after cutting edge abrasion Change, but due to expanding at the material leakage of cutting edge bottom, therefore cavity plate working portion intensity is poor, easily gather clout, but this kind Punch-pin is applied to the mould that waste material falls along pressing direction, and the dimensional accuracy of blanking part is high, easy to make.

Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.

Claims (10)

1. the convex overall mould for the microreplicated shaped hole of SG emery wheel abrasive materials, it is characterised in that including four duplicate entirety Formula punch device, four integral-typed punch devices are stitched together to form an entirety, and each integral-typed punch device includes one Individual supporting plate, three row's punch members being provided with described supporting plate, first row and the 3rd row's punch member correspond to up and down completely, Second row punch member and first row, the 3rd row's punch member stagger setting, each punch member of second row are located at first row Or the 3rd the adjacent punch member of row center line on.

2. it is used for the punch-pin of the microreplicated shaped hole of SG emery wheel abrasive materials as claimed in claim 1, it is characterised in that described support Plate and described punch member are integral type structure, are manufactured by way of linear cutter.

3. it is used for the punch-pin of the microreplicated shaped hole of SG emery wheel abrasive materials as claimed in claim 1, it is characterised in that the punch-pin list Member is provided with cutting edge.

4. a kind of cavity plate for the microreplicated shaped hole of SG emery wheel abrasive materials, it is characterised in that including a concave template, described Concave template is provided with hole corresponding with the punch-pin described in claim 1.

5. it is used for the cavity plate of the microreplicated shaped hole of SG emery wheel abrasive materials as claimed in claim 4, it is characterised in that in described hole Provided with cutting edge.

6. a kind of overall diel, it is characterised in that including recessed described in the punch-pin described in claim 1 and claim 4 Mould.

7. a kind of overall diel as claimed in claim 6, it is characterised in that described overall die stamping system of processing is also Including upper bolster, die shoe, connected between described upper bolster, die shoe by guide column sleeve, the installation of described upper bolster bottom One backing plate, a die shank for passing through cope plate is installed at the top of described backing plate；The bottom of backing plate is provided with punch-pin, and convex The bottom of mould is provided with stripper, and described stripper is connected by bolt with described cope plate, and positioned at cope plate with unloading Shank of bolt between flitch is provided with spring；One die block is installed at the top of described die shoe, described recessed The top of mould fixed plate is provided with a cavity plate, and described cavity plate, die block and die shoe connect into an entirety.

A kind of 8. overall diel as claimed in claim 7, it is characterised in that described punch-pin by screw with it is described Backing plate is connected, and described backing plate is connected by screw with described upper bolster.

9. a kind of overall diel as claimed in claim 7, it is characterised in that on described die shoe, die block Provided with relief hole corresponding with cavity plate.

10. a kind of full-automatic material-feeding system of processing, including a kind of overall diel described in claim 7 can continuous stamping die Tool and automatic intermittent feeding structure, described automatic intermittent feeding structure for it is described can continuous stamping die feeding, it includes Stepper motor, described stepper motor is rotated by four roll shafts of actuator drives, before two of which roll shaft is setting up and down End, two other roll shaft are setting up and down in rear end；Flitch passes through the top of arrival cavity plate after four roll shafts.