CN107442640A - Convex, recessed for the microreplicated shaped hole of SG abrasive materials inlays mould and mould, system - Google Patents
Convex, recessed for the microreplicated shaped hole of SG abrasive materials inlays mould and mould, system Download PDFInfo
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- CN107442640A CN107442640A CN201710562421.7A CN201710562421A CN107442640A CN 107442640 A CN107442640 A CN 107442640A CN 201710562421 A CN201710562421 A CN 201710562421A CN 107442640 A CN107442640 A CN 107442640A
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- Prior art keywords
- punch
- plate
- pin
- die
- mould
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Classifications
-
- 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
-
- 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
-
- 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
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
-
- 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
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
- B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/10—Combined ejecting and stripping-off devices
Abstract
The invention discloses inlay mould and mould, system for the convex, recessed of the microreplicated shaped hole of SG abrasive materials, the invention is according to the size and the size of related edge-lapped value and the manufacture of related die of workpiece, the distribution situation of punch member is have adjusted, the number of punch member is determined according to the size of the size of blanking pressure and edge-lapped value.The automatic feeding system designed according to the characteristic of stepper motor coordinates pattern type mentioned in the present invention, cooperates and the system of processing that can continue processing punching can be achieved.
Description
Technical field
The present invention relates to pressure processing field, more particularly to thin plate Process and the punch and matrix of high form accuracy requirement
And mould, 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, according to current processing mode, the key issue of the microreplicated forming hole of SG abrasive particles is processed in profile
Form accuracy, and precision stability when producing in batches is realized, SG abrasive particles only could be further improved on this basis to be cut
Consider the sharpness of sword to be worth doing, realize the uniformity of SG grit sizes.
The content of the invention
The first object of the present invention is a kind of punch and matrix row suitable for the microreplicated shaping punch die of SG emery wheel abrasive materials of design
Sample designs, and according to the manufacture of the size and related die of the size of workpiece and related edge-lapped value, have adjusted punch-pin
The distribution situation of unit, the number of punch member is determined according to the size of the size of blanking pressure and edge-lapped value.
Second object of the present invention is to provide a kind of mould including above-mentioned punch-pin and cavity plate.
The third object of the present invention is to provide a kind of the whole series being processed suitable for the microreplicated mould of SG emery wheel abrasive materials and added
Work system, the automatic feeding system designed according to the characteristic of stepper motor coordinate pattern type mentioned in the present invention, phase interworking
Close the system of processing that can be achieved that processing punching can be continued.
In order to reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
The invention provides a kind of punch-pin for the microreplicated shaped hole of SG emery wheel abrasive materials, including an inlay location plate,
Multiple punch members, distribution mode of the punch member in inlay location plate bottom are provided with the bottom of described inlay location plate
It is：
It is assumed that the bottom surface of inlay location plate is uniformly divided into several square shaped cells, along the vertical of inlay location plate
A plurality of jaggies is set gradually to direction；Starting point, terminal and the summit of every jaggies overlap with the summit of square shaped cells,
And the starting point of a plurality of jaggies is located in same vertical line, the terminal of a plurality of jaggies is located in same vertical line；
Crossover location on the jaggies Yu rectangular element summit sets punch member.
Further, the angle of described jaggies can be 60 degree, 45 degree, 50 degree etc., design as needed；
Further, the distance between longitudinally adjacent jaggies summit with wall scroll jaggies peak between minimum point
Distance can be adjusted as needed.
Punch member lateral separation in the present invention is constant, is uniformly arranged to both sides in longitudinal direction so that the arrangement of punch-pin is use up
It may disperse, be not only convenient for being simple to manufacture conveniently for punch process, Reducing distortion, and concave-convex mold, reduce processing cost.
The inserted punch-pin is made up of inlay location plate, free-standing punch-pin.Such a damascene location-plate is mainly used in protecting
Positioning precision and stock layout requirement are demonstrate,proved, its relative wear amount is smaller, therefore intensity, hardness can be used common less than punch-pin
Material is processed.Free-standing punch-pin is mainly used in punch process, higher to requirements such as intensity, hardness, precision, can use higher
The material use electrical discharge machining of intensity, and positioned using taper, ensure its stability.
The pattern type is to realize under conditions of reasonable punching press gap so that the stock utilization of micro hole arrangement
Highest, and ensure machining accuracy to a certain extent, while there is higher processing efficiency.
Present invention also offers a kind of cavity plate suitable for the microreplicated shaping punch die of SG emery wheel abrasive materials, including a cavity plate
Plate, it is provided with described concave template and is located at relative hole with described punch member.
Present invention also offers one kind can continuous diel, including described punch-pin and cavity plate.
Further, it is described can continuous stamping die also include top mold frame, guide pillar, cope plate, die shank, stripper and
Lower template；Described top mold frame, cope plate, lower template are parallel to each other, and are connected between three by guide pillar in the horizontal direction；
The die shank of top mold frame is provided through at the top of described cope plate；Punch-pin is provided with the bottom of described cope plate；Described is recessed
Mould is arranged on relative with described punch-pin in lower template；In the both sides of described cavity plate stripper is fixed with bolt.
Further, the bottom of described inlay location plate is provided with striker plate, and striker plate is provided with and punch member
Relative hole；Punch member passes through described striker plate；The outer ring of striker plate is provided with the reset rubber for resetting up and down；
Present invention also offers a kind of full-automatic material-feeding system of processing, including it is described can continuous stamping die and it is automatic between
Have a rest feeding structure, described automatic intermittent feeding structure for it is described can continuous stamping die feeding, it includes stepper motor, institute
The stepper motor stated is rotated by four roll shafts of actuator drives, two of which roll shaft front end setting up and down, 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.
Further, the distance that described flitch advances once is equal to the length of side of single square shaped cells in punch-pin distribution.
The system is controlled by PC and operated, it is possible to achieve full-automation processing, forcing press punching course and interval feeding structure
Coordinated by travel switch and operated.In punching course, stepper motor plays temporary transient positioning action, after punching press terminates, stepper motor
Certain angle is rotated, controls feeding stroke.
Beneficial effects of the present invention are as follows：
The present invention is directed to row's plate mode of the microreplicated forming hole of SG abrasive particles, it is proposed that a kind of new punch-pin pattern type.Should
Inserted punch-pin is made up of inlay location plate, free-standing punch-pin and backing plate.Such a damascene location-plate mainly serves for ensuring fixed
Position precision and stock layout requirement, its relative wear amount is smaller, therefore intensity, hardness can be used to be less than the common material of punch-pin
Processing.Free-standing punch-pin is mainly used in punch process, higher to requirements such as intensity, hardness, precision, can use higher-strength
Material use electrical discharge machining, and using taper position, ensure its stability.
In the course of work, among plate first is fixed on into stop gauge, and the braking action of stepper motor is utilized to carry out letter
Single positioning, forcing press drives punch-pin to push, and before being combined with cavity plate, striker plate is first contacted with plate, and elastic caoutchouc is compressed,
So that plate is pressed on cavity plate, the purpose of binder is realized, subsequent punch-pin, which combines, completes first time punching press.Subsequent concave-convex mold point
From, punch-pin elder generation separation material, and striker plate in the presence of elastic caoutchouc with being separated after material, the waste material in cavity plate is with material guide hole
Fall into lower section and be collected, realize the effect of backgauge, one time blanking process terminates.Then plate in the presence of feeding structure again
After secondary feeding 48mm, above-mentioned blanking process is repeated, because the distance that is sent into every time is 6 times of back gauge between aperture, it is therefore desirable to five
Secondary feeding could complete the processing of monoblock sheet material.
Brief description of the drawings
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
Fig. 1 is to inlay die stamping system of processing axonometric drawing；
Fig. 2 is the half-sectional front view of microreplicated mould；
Fig. 3 is the microreplicated forming hole of SG abrasive particles；
Fig. 4 is typesetting schematic diagram；
Fig. 5 a, 5b, 5c, 5d, 5e are flow process chart；
Fig. 6 is inserted punch member body；
Fig. 7 is inserted punch-pin；
Fig. 8 is inserted punch-pin top view；
Fig. 9 is cavity die structure top view；
Figure 10 is cavity die structure front view；
Figure 11 is automatic feeding system axonometric drawing；
Figure 12 is automatic feeding system top view；
The stroke curve figure of blanking pressure and punch-pin when Figure 13 is punched；
Figure 14 blade clearances schematic diagram；
The instantaneous state figure cracked in Figure 15 blanking process；
Punch and matrix Blade dimensions, tolerance and the graph of a relation of blanking part size and its tolerance when Figure 16 blankings and punching；
Figure 17 cutting edge of die schematic diagrames；
Wherein, the symbol of accompanying drawing is expressed as：1- cavity plates, 2- lower templates, 3- striker plates, 4- cope plates, 5- die shanks, on 6-
Mould bases, 7-304 coiled strips, 8- roll shafts, 9- stepper motors, 10- big belt wheels, 11- strippers, 12- fixing bolts, 13- guide shafts, 14-
Inlay location plate, 15- elastic caoutchoucs, 16- guide pillars, 17- backing plates, 18- location-plates, 19- bottom plates, 20- etc. compare gear train.
Embodiment
Of large quantities, stock utilization is produced according to blanking part and requires that high, blanking part form accuracy requires the characteristics of higher,
Consult《Diel application manual》Understand edge-lapped value >=2.8mm of processing stainless steel 304.Will if stock layout edge-lapped value is ungratified
Ask, then easily cause material deformation and failure, and should be taken into account that punch-pin fabricates problem in design.
Because the size of punch-pin is smaller, so stripper has the function that to protect punch-pin and is oriented to simultaneously.For convenience more
Change, punch design is selected into cold work die steel (C into block insert type structure, materialr12MoV), fixed using by screw, alignment pin is fixed
Position.Strip width is 300mm, and thickness 0.5mm, material is 304 stainless steels, it is desirable to the chamfering that punching production goes out is small as far as possible,
Therefore blanking part precision takes IT8 levels, Making mold precision takes IT6~IT7 levels.According to《Diel application manual》Understand, processing is not
The scrap (bridge) a of rust steel 3041>=2.8mm, pressure boundary values are 6mm,.Because material thickness is 0.5mm, therefore the table of the section of blanking part
Surface roughness RaTake 3.2 μm.The critical shape of punching is the equilateral triangle that the length of side is 3mm, and processing difficulties are to make work after processing
The fillet of part is small as far as possible.Each punching number is 185, is computed the consumption of one piece
Stock 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：
Tp+Td≤Zmax-Zmin (1-2)
Or take Tp=0.4 (Zmax-Zmin) (1-3)
Td=0.6 (Zmax-Zmin) (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 τb (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；
τb- material shearing strength, MPa.Strength degree of drawing materials σb80%, i.e. τb=0.8 σb。
The Zhou Changwei 9mm in single hole, the tensile strength sigma of stainless steel 304bFor 520MPa, therefore τb=0.8 σb=416MPa.Therefore
Rushing the blanking pressure 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
FAlways=2433.6 × 176=428313.6N
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.
So the punching work(in single hole is
Always punching work(is
WAlways=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, the present invention determine to use elastic tripper
With the mode of bottom discharge, so total blanking pressure FZFor：
FZ=F+F1+F2 (1-10)
Therefore FZ=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=HGu+HUnload+HLead+Y (1-11)
In formula：L-punch-pin length, mm；
HGu- punch retainer thickness, mm；
HUnload- positive stripper thickness, mm；
HLead- 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；
[σPressure]-punch-pin carries out the permissible compression stress after Quenching Treatment, MPa.Knot depending on material, heat treatment and mould
Structure, by《Diel application manual》Check in [σPressure]=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 the present invention has corresponding guider and spring loaded shedder, and at this moment the stress of punch-pin can be considered as 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
Lmax, calculated by Euler's formula
Non-circular punch-pin should meet：
In formula：Lmax- 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-pinmax, 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 the present invention does not have gradient, there is fixed height h, cutting edge abrasion
Size will not change afterwards, 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, takes h=4
~8mm.This stamping material thickness t=0.5mm, it is possible to take t=4mm.According to bibliography《Diel application manual》Look into
Obtain 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 σIt is curved=470MPa≤[σIt is curved], so being safe.
The stroke curve of blanking pressure and punch-pin when Figure 12 is punching.In figure AB sections for punching elastic deformation stage, punch-pin
Start with material after meeting, load rises rapidly；The cutting edge of punch-pin enters in plate, and after material starts plastic deformation, load is delayed
Slow increase, such as the BC stages in figure, because punch-pin enters material, the material area for bearing blanking pressure reduces, but material is processed
The effect of hardening phenomenon has exceeded the effect that area diminishes, and blanking pressure continues to increase, when both effects equal moment, punching
Power 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 has occurred to process hardening
Effect, blanking pressure starts to reduce.Punch-pin Continued downward motion, the crackle Rapid Expansion of material internal, blanking pressure are quickly reduced,
As shown in the CD sections in figure, this section is the fracture stage of punching.
Blade clearance refers to the space between mould convex mould and cutting edge of die.Punch-pin and the side clearance of cavity plate two and referred to as
For double-faced clearance, represented with Z, as shown in figure 13.Blade clearance is to the cross section quality of blanking, the service life of punch and matrix,
Blanking pressure etc. has a very big impact.The present invention determines gap method using theoretical, and Main Basiss are to ensure that crackle overlaps up and down, and
Straight line is intersected at, is the instantaneous shape cracked in blanking process shown in Figure 14 to obtain preferable cross section quality
State.
Punch and matrix Blade dimensions when blanking and punching, relation such as Figure 16 institutes of tolerance and blanking part size and its tolerance
Show.
In figure：DdThe basic size of-cavity die of blanking die cutting edge, mm；
DPThe basic size of-blanking punch cutting edge, mm；
ddThe basic size of-perforating die cutting edge of die, mm；
dpThe basic size of-perforating die punch-pin cutting edge, mm；
DmaxThe maximum limit of size of-blank, mm；
dminThe minimum limit of size in-punching aperture, mm；
Δ-blanking part tolerance；
ZminThe two-sided reasonable clearance of-minimum, mm；
ZmaxThe two-sided reasonable clearance of-maximum, mm (are not marked) in figure；
Td- cutting edge of die manufacturing tolerance；
Tp- 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 Zmin0.035mm is taken, blanking part tolerance Δ takes 0.008mm, punch-pin cutting edge manufacture public affairs
Poor TpTake 0.016~0.02mm, cutting edge of die manufacturing tolerance TdTake 0.02mm.
As shown in figure 4, the micro hole for finally needing to process is represented that then the stock layout of punch-die is by following with coordinate (X, Y)
Method is amplified twice respectively：To amplify for the first time, i.e., its X value is constant, and Y value changes according to Y=(n-1) b modes, i.e., and first
Concave-convex mold arrangement after secondary amplification is (X, (n-1) b), and wherein n is the place line number of concave-convex mold, and b is true according to stepper motor institute
A fixed feeding stroke, and b should be the integral multiple of spacing between aperture；Amplify for the second time, i.e. X values on Y=(n-1) b straight lines
It is constant, Y value successively with 0, a, 2a, 3a ... (p-1) a, pa, (p-1) a ... 3a, 2a, a, 0, a, 2a, 3a ... (p-1) a, pa, (p-
1) a ... 3a, 2a, a ... (p round numbers and) summation, until the aperture on Y=(n-1) b straight lines is all drained.Wherein a value
It can be determined according to the processing technology of concave-convex mold.
In such a method, a, b, p value decide the arrangement spacing of concave-convex mold, and the primary focus of this secondary design.Its
In, as a=1, then the minimum spacing of concave-convex mold is a, and as a >=2, then the minimum spacing of concave-convex mold arrangement is 2a；；Such as scheming
In design shown in 4, it is desirable to which the small pitch of holes of processing is 8mm, then according to the setting principle of mould, takes n=5, b=40mm, p
=4, a=2；Then the minimum spacing of its concave-convex mold is increased to 16mm, and in theory, its operating efficiency is single punching press
185 times.
Its monoblock sheet material punching course is specifically divided into the completion of the step of a, b, c, d, e five：Struck out as shown in Figure 5 a for first time
Type.Subsequent punch-die separation, travel switch control stepper motor start, band action roller shaft feeding forward, and ensure each feeding row
Journey is b, and b=40mm is selected herein according to design.Motor stops operating after the completion of feeding, and punch-die completes second of punching press,
As shown in Figure 5 b, circulated five times with this, you can complete the press work of monoblock plate.
For case above, it is proposed that a kind of pattern type.And according to stock layout, it is proposed that a kind of inserted punch structure.
The inserted punch-pin is made up of inlay location plate, free-standing punch-pin and backing plate.Such a damascene location-plate mainly serves for ensuring
Positioning precision and stock layout requirement, its relative wear amount is smaller, therefore intensity, hardness can be used to be less than the common material of punch-pin
Material processing.Free-standing punch-pin is mainly used in punch process, higher to requirements such as intensity, hardness, precision, can use more high-strength
The material use electrical discharge machining of degree, and positioned using taper, ensure its stability.
Set of molds prejudice Fig. 1 of the present invention, shown in 2：One kind can continuous stamping die, including punch-pin and cavity plate 1, upper mould
Frame 6, guide pillar 16, cope plate 4, die shank 5, stripper 11 and lower template 2；Described top mold frame 6, cope plate 4, lower template 2 are in water
Square it is parallel to each other, and is connected between three by guide pillar 16 upwards；Top mold frame 6 is provided through at the described top of cope plate 4
Die shank 5；Punch-pin is provided with the bottom of described cope plate 4；Described cavity plate is arranged on punch-pin phase in lower template and described
It is right；In the both sides of described cavity plate stripper is fixed with bolt；
The bottom of described inlay location plate is provided with striker plate 3, and striker plate 3 is provided with relative with punch member
Hole；Punch member passes through described striker plate 3.The outer ring of striker plate is provided with the reset rubber 15 for resetting up and down.
Further, punch-pin, including an inlay location plate 14, it is provided with the bottom of described inlay location plate 14 multiple
Punch member, distribution mode of the punch member in inlay location plate bottom is as shown in Figure 4：
It is assumed that the bottom surface of inlay location plate is uniformly divided into several square shaped cells, along the vertical of inlay location plate
The distance between the jaggies, longitudinally adjacent jaggies summit that a plurality of angle is 60 degree is set gradually to direction to saw equal to wall scroll
Tooth trace peak to distance between minimum point 5/6；Starting point, terminal and the summit of every jaggies and the top of square shaped cells
Point overlaps, and the starting point of a plurality of jaggies is located in same vertical line, and it is vertical that the terminal of a plurality of jaggies is located at same
On straight line；Crossover location on the jaggies Yu rectangular element summit sets punch member.
The hole corresponding with described punch member is provided with described concave template.
A kind of full-automatic material-feeding system of processing provided by the invention, including it is described can continuous stamping die and automatic intermittent
Feeding structure, described automatic intermittent feeding structure for it is described can continuous stamping die feeding, it includes stepper motor 9, institute
The stepper motor 9 stated drives four roll shafts 8 to rotate by waiting than gear train 20, big belt wheel 10, is divided on two of which roll shaft 8
The front end put, two other roll shaft 8 are setting up and down in rear end；Flitch passes through the top of arrival cavity plate after four roll shafts.
In the course of work, among plate first is fixed on into stop gauge, and the braking action of stepper motor is utilized to carry out letter
Single positioning, forcing press drives punch-pin to push, and before being combined with cavity plate, striker plate is first contacted with plate, and elastic caoutchouc is compressed,
So that plate is pressed on cavity plate, the purpose of binder is realized, subsequent punch-pin, which combines, completes first time punching press, as shown in Figure 5 a.With
Concave-convex mold separates afterwards, punch-pin elder generation separation material, and striker plate in the presence of elastic caoutchouc with being separated after material, it is useless in cavity plate
Material falls into lower section with material guide hole and is collected, and realizes the effect of backgauge, one time blanking process terminates.Then plate is in feeding structure
In the presence of feed 48mm again after, repeat above-mentioned blanking process, because the distance that is sent into every time is 6 times of back gauge between aperture,
Therefore need to feed the processing that could complete monoblock sheet material five times.
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. a kind of inlay mould for the convex of the microreplicated shaped hole of SG abrasive materials, it is characterised in that including an inlay location plate, in institute
The bottom for the inlay location plate stated is provided with multiple punch members, and distribution mode of the punch member in inlay location plate bottom is：
It is assumed that the bottom surface of inlay location plate is uniformly divided into several square shaped cells, along the longitudinal direction side of inlay location plate
To setting gradually a plurality of jaggies；Starting point, terminal and the summit of every jaggies overlap with the summit of square shaped cells, and more
The starting point of bar jaggies is located in same vertical line, and the terminal of a plurality of jaggies is located in same vertical line；Institute
State jaggies and the crossover location on rectangular element summit sets punch member.
2. a kind of as claimed in claim 1 inlay mould for the convex of the microreplicated shaped hole of SG abrasive materials, it is characterised in that described
Punch member is provided with cutting edge.
3. a kind of cavity plate for the microreplicated shaping punch die of SG emery wheel abrasive materials, it is characterised in that including a concave template, in institute
The concave template stated is provided with the hole corresponding with the punch member described in claim 1.
A kind of 4. cavity plate for the microreplicated shaping punch die of SG emery wheel abrasive materials as claimed in claim 3, it is characterised in that institute
The inside in the hole stated is provided with cutting edge.
5. one kind can continuous stamping die, it is characterised in that including described in the punch-pin described in claim 1 and claim 2
Cavity plate.
6. one kind as claimed in claim 5 can continuous stamping die, it is characterised in that also including top mold frame, guide pillar, upper mould
Plate, die shank, stripper and lower template；Described top mold frame, cope plate, lower template are parallel to each other in the horizontal direction, and three
Between be connected by guide pillar；The die shank of top mold frame is provided through at the top of described cope plate；In the bottom of described cope plate
Provided with punch-pin；Described cavity plate is arranged on relative with described punch-pin in lower template；Consolidated in the both sides of described cavity plate with bolt
Surely there is stripper.
7. one kind as claimed in claim 5 can continuous stamping die, it is characterised in that the bottom peace of described inlay location plate
Equipped with striker plate, and striker plate is provided with the hole relative with punch member；Punch member passes through described striker plate.
8. one kind as claimed in claim 7 can continuous stamping die, it is characterised in that the outer ring of striker plate be provided with for
The reset rubber of lower reset.
A kind of 9. full-automatic material-feeding system of processing, it is characterised in that including described in claim 3 can continuous stamping die and from
Dynamic interval feeding structure, described automatic intermittent feeding structure for it is described can continuous stamping die feeding, it is electric that it includes stepping
Machine, described stepper motor are rotated by four roll shafts of actuator drives, two of which roll shaft front end setting up and down, in addition
Two roll shafts are setting up and down in rear end；Flitch passes through the top of arrival cavity plate after four roll shafts.
10. a kind of full-automatic material-feeding system of processing as claimed in claim 9, it is characterised in that described flitch advances once
Distance be equal to single square shaped cells the length of side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710562421.7A CN107442640A (en) | 2017-07-11 | 2017-07-11 | Convex, recessed for the microreplicated shaped hole of SG abrasive materials inlays mould and mould, system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710562421.7A CN107442640A (en) | 2017-07-11 | 2017-07-11 | Convex, recessed for the microreplicated shaped hole of SG abrasive materials inlays mould and mould, system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107442640A true CN107442640A (en) | 2017-12-08 |
Family
ID=60488848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710562421.7A Withdrawn CN107442640A (en) | 2017-07-11 | 2017-07-11 | Convex, recessed for the microreplicated shaped hole of SG abrasive materials inlays mould and mould, system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107442640A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855404A (en) * | 2017-12-14 | 2018-03-30 | 华北理工大学 | A kind of apparatus and method for adjusting roll-type punching spacing |
| CN116765234A (en) * | 2023-08-16 | 2023-09-19 | 无锡市通快机械有限公司 | Frame punching equipment of surgical mechanical box |
-
2017
- 2017-07-11 CN CN201710562421.7A patent/CN107442640A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855404A (en) * | 2017-12-14 | 2018-03-30 | 华北理工大学 | A kind of apparatus and method for adjusting roll-type punching spacing |
| CN107855404B (en) * | 2017-12-14 | 2023-04-18 | 华北理工大学 | Device and method for adjusting roller type punching distance |
| CN116765234A (en) * | 2023-08-16 | 2023-09-19 | 无锡市通快机械有限公司 | Frame punching equipment of surgical mechanical box |
| CN116765234B (en) * | 2023-08-16 | 2023-10-27 | 无锡市通快机械有限公司 | Frame punching equipment of surgical mechanical box |
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Application publication date: 20171208 |