There is the shielding part of hemisection structure, for forming method and the mould of this shielding partTechnical field
The method that the present invention relates to stamped shield part, the method being particularly to the formation of the shielding part with hemisection structure, alsoRelate to process the mould of the shielding part with hemisection structure and there is the shielding part of hemisection structure.
Background technology
Such as mobile phone, personal digital assistant (Personal Digital Assistant, PDA) and palm PC etcElectronic product all has circuit board and shielding part.This shielding part surrounds this circuit board and reaches the effect of shielding.Existing shieldingPart is the monolithic construction of integrated punching, monolithic construction disadvantageously, after assembling product, if the property of electronic productCan test the most up to standard, it is impossible to realize opening shielding part and regulating corresponding component in the case of undamaged, so, monolithic constructionShielding part can be only applied to stable performance, need not the shielding of electronic devices and components of regulation.
Cannot realize opening in the case of undamaged to solve the shielding part of monolithic construction and regulate corresponding componentProblem, shielding part is set to shielding case (shielding case) and (shielding of screening cover by prior artCover) split-type structural, although the shielding part of split-type structural can realize opening the function of regulation, but is intended to first be divided into twoIndividual part (shielding case and screening cover) assembles again, adds cost.
In order to solve split type shielding part and the problem of integrated shielding part existence, develop in the industry one and there is hemisection knotThe shielding part of structure, in this shielding part, hemisection structure and shielding part are integrally formed that (namely hemisection structure is of shielding partPoint), after assembling product, if electronic product performance test is the most up to standard, by hemisection structure from shielding part dismounting in shielding partThe parts in portion are adjusted, and after electronic product performance is up to standard, cover a screening cover (shielding at hemisection structureCover).In such cases, owing to hemisection structure can be removed, the screen with hemisection structure of screening cover can be coveredShield is considered split-type structural；If electronic product performance test is up to standard, then need not screening cover, in such cases, haveThe shielding part of hemisection structure may be considered monolithic construction), compare " flexible ", screening cover (shielding cover) makesThe yields tested with quantity and electronic product performance is inversely proportional to, so, it is widely portable to multiple electronics unit in theoryThe shielding occasion of device.
Refer to Fig. 1 and Fig. 2, in prior art, one piece of metalwork is carried out stamping-out and there is hemisection structure described in being formed11 and the shielding part 1 of shielding part body 12, this shielding part body 12 connects described hemisection structure 11.Form this shielding part processIn, mold and punching head 2 and cushion block 3 use matched in clearance (gap value C >=0, as it is shown in figure 1, gap value C > 0).By stamping-out modeThe shielding part 1 formed will form die-cut end face 121 and tear face 122.In blanking process, punching depth H is difficult to control, asReally punching depth H too conference makes hemisection structure 11 drop or is very easy to drop, and easily produces gap, causes shieldingThe shielding properties of part 1 disappears or declines；And if punching depth H is the least, it will make hemisection structure 11 and described shielding partThe junction (tear face 122) of body 12 is the thickest and causes hemisection structure 11 to be difficult to remove.So, the two is difficult to find a conjunctionThe equilibrium point of reason, i.e. suitably punching depth, this punching depth both ensures the shielding with the shielding part 1 of hemisection structure 11,Hemisection structure 11 can be made again to be easy to remove.
Summary of the invention
The problem that the present invention solves is to have the shielding part of hemisection structure in prior art to be difficult to meet simultaneously and both have veryThe problem that good shielding can easily be removed again.
For solving the problems referred to above, the present invention provides a kind of shielding part with hemisection structure, and this shielding part includes shielding partBody and hemisection structure, this shielding part body has die-cut end face, described die-cut end face vertical, and this shielding part also includes in flat boardShape and connect the fine and close extruded layer of described hemisection structure and shielding part body, this densification extruded layer has and hangs down with described die-cut end faceStraight surface.
As further scheme, described shielding part is made up of tin plate, and the width of described fine and close extruded layer is 0.02mm～0.08mm, thickness is 0.02mm～0.1mm.
As further scheme, described hemisection structure includes the first hemisection structure and the second hemisection structure, the first hemisection knotThe depression outside towards shielding part body, the direction of structure, the second hemisection structure is formed at corner and the depression side of the first hemisection structureTo the inside towards shielding part body.
As further scheme, described shielding part body generally body structure and there is end face, described first hemisection knotBeing configured to this end face in shielding part body, described second hemisection structure is then formed in the first hemisection structure, described shielding partThe surface area of body top surface is more than the surface area of the first hemisection structure, and the surface area of described first hemisection structure is more than the second halfCut the surface area of structure.
As further scheme, the apical side height of described shielding part body and the apical side height of the second hemisection structure equal andLess than the apical side height of the first hemisection structure, described fine and close extruded layer include being connected to the first hemisection structure and shielding part body itBetween the first fine and close extruded layer and the first hemisection and the second hemisection structure between the second fine and close extruded layer.
As further scheme, the width of the second fine and close extruded layer connecting the first hemisection structure and the second hemisection structure is0.02mm～0.08mm, thickness is 0.02mm～0.1mm；Connect the first fine and close extruding of the first hemisection structure and shielding part bodyThe width of layer is 0.02mm～0.08mm, and thickness is 0.02mm～0.1mm.
The present invention also provides for a kind of method for forming the shielding part with hemisection structure, and the method includes walking as followsRapid: A), make mold and punching head and cushion block interference fit, matching allowance is more than zero；B), make metalwork be positioned at mold and punching head andBetween cushion block, the punching depth of mold and punching head is set, metalwork described in mold and punching head punching press is formed and there is hemisection structure, densificationExtruded layer and the shielding part of shielding part body, described fine and close extruded layer connects shielding part body and hemisection structure, in tabular andThere is the surface that direction die-cut with described mold and punching head is vertical, and when mold and punching head reaches described punching depth, this densification is squeezedLaminate layer constitutes laminated construction with a part for cushion block and a part for mold and punching head.
As further scheme, described metalwork is the tin plate that 0.6mm is thick, the scope of the punching depth of mold and punching headBeing 0.50mm～0.58mm, the scope of value of interference fit is 0.02mm～0.08mm, and the width of described fine and close extruded layer is0.02mm～0.08mm, thickness is 0.02mm～0.1mm.
Invention additionally discloses a kind of mould for forming the shielding part with hemisection structure, this mould includes mold and punching headAnd cushion block, described mold and punching head and cushion block interference fit, and value of interference fit is more than zero.
As further scheme, the scope of described value of interference fit is 0.02mm～0.08mm.
Compared with prior art, the invention have the advantages that
Due to mold and punching head and cushion block interference fit, by adjusting punching depth H and matching allowance C, so that:1), fine and close extruded layer close structure, there is no gap, shielding requirement can be met completely；2), fine and close extruded layer is by verticalThe local readily removable function removed of hemisection structure is realized when the external force of this densification extruded layer, but will not be as the tear face structure of prior artThe hemisection structure become the most easily drops；3), regulate the magnitude of interference and punching depth and width and the thickness of extruded layer can be regulated,So, thickness and the width of fine and close extruded layer are easily controlled, it is easy to shielding part shielding, readily removable except and be not easy to take offFinding balance between falling, control accuracy is high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the method forming the shielding part with hemisection structure in prior art；
Fig. 2 is the partial schematic diagram of the shielding part with hemisection structure using the method shown in Fig. 1 to be formed；
Fig. 3 be the present invention formed the mold and punching head of the method for the shielding part with hemisection structure and cushion block be interference fit andThe schematic diagram of the most non-stamped metal part；
Fig. 4 is that the present invention forms the method stamped metal part rear mold drift of the shielding part with hemisection structure, cushion block, goldBelong to part and the view of hemisection structure；
Fig. 5 is the partial schematic diagram of the metalwork in Fig. 4 with hemisection structure；
Fig. 6 is the three-dimensional structure diagram of the shielding part with hemisection structure using the method for the present invention to be formed；
Fig. 7 is the sectional view of the line A-A section view along Fig. 6；
Fig. 8 is the partial enlarged drawing of the part B of Fig. 7.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being reached purpose and effect, below in conjunction with embodimentAnd coordinate accompanying drawing to be described in detail.
Referring to Fig. 3 to Fig. 5, the present invention includes walking as follows for the method forming the shielding part 1 with hemisection structure 11Rapid: A), make mold and punching head 2 and cushion block 3 interference fit, matching allowance C is more than zero；Mold and punching head 2 and the initial shape of cushion block 3State is as shown in Figure 3；B), make metalwork between mold and punching head 2 and cushion block 3, the punching depth H of mold and punching head 2 is set, byMetalwork described in mold and punching head 2 punching press, has hemisection structure 11, shielding part body 12 and the screen of fine and close extruded layer 13 described in formationShield 1.Described fine and close extruded layer 13 is connected described shielding part body 12 and hemisection structure 11 by this densification extruded layer 13, have andThe surface that the die-cut direction of described mold and punching head is vertical, namely this densification extruded layer 13 is vertical with die-cut end face 121.Due to mouldDrift 2 and cushion block 3 interference fit, so, when mold and punching head 2 reaches punching depth H, described fine and close extruded layer 13 is rushed by mould2 and cushion block 3 extrude and in tabular, this densification extruded layer 13 part with cushion block 3 and the part composition of mold and punching head 2Laminated construction, this laminated construction is as shown in Fig. 4 dashed circle, and relative two surfaces of fine and close extruded layer 13 contact described pad respectivelyA part for block 3 and a part for mold and punching head 2.By adjusting punching depth H and matching allowance C, can be easily controlledThe fine and close long a of extruded layer 13(, wide size b), such as, when described metalwork is tin plate (also referred to as Ma Kou thick for 0.6mmFerrum), the scope of the punching depth H of mold and punching head 2 is 0.50mm～0.58mm, such as 0.50mm, 0.52mm, 0.55mm,0.58mm etc., the scope of value of interference fit C is 0.02mm～0.08mm, such as, 0.02mm, 0.03mm, 0.05mm, 0.08mmDeng, in this case, the width (a) of the fine and close extruded layer 13 formed is 0.02mm～0.08mm, and thickness (b) is 0.02mm～0.1mm, in the present embodiment, a=0.55mm, b=0.03mm.For tin plate (also referred to as tinplate), when die-cut deeplyDegree H and value of interference fit C is when above-mentioned scope, and the shield effectiveness of the shielding part 1 with hemisection structure is best, and, hemisection is tiedStructure is easily removed and is not easy to come off.
In sum, owing to being interference fit between mold and punching head 2 and cushion block 3, so, the method for the present invention has followingAdvantage: 1), fine and close extruded layer 13 be that mold and punching head 2 vertically extrudes cushion block 3 and produces, close structure, there is no gap, the most permissibleMeet shielding requirement；2), the material texture of vertical extruding generation is horizontally oriented, when by bigger F as shown in Figure 3The when of the external shock power in direction, fine and close extruded layer 13 can produce phenomenon of rupture, it is thus possible to it is easy to realize local hemisection structureThe function removed, but easily will not drop as the hemisection structure that the tear face of prior art is constituted；3), fine and close extruded layer 13Close structure, is just easily controlled the size of this densification extruded layer 13, control by controlling punching depth H and value of interference fit CThe precision of this densification extruded layer 13 size is high, and, this densification extruded layer may also reach up the requirement being difficult to drop, and in a word, incites somebody to actionThis squash type stamping-out scheme is applied on metal stamping shielding part series products, can realize hemisection structure easily, completelyThe performance requirement of metal stamping shielding part series products can be met, and the cost of this series products can be substantially reduced.
Refer to Fig. 3 and Fig. 4, based on techniques described above thinking, invention additionally discloses one, for being formed, there is hemisectionThe mould of the shielding part of structure, this mould includes mold and punching head 2 and cushion block 3.Described mold and punching head 2 and cushion block 3 interference fit, andValue of interference fit C is more than zero.When having the shielding part of hemisection structure described in processing tinplate and constituting, described value of interference fit CScope and the scope of punching depth H of mold and punching head 2 as it was previously stated, do not repeat them here.
Refer to Fig. 6 to Fig. 8 and combine Fig. 3 to Fig. 5, invention additionally discloses a kind of shielding part 1 with hemisection structure 11,This shielding part 1 includes shielding part body 12, hemisection structure 11 and fine and close extruded layer 13.This shielding part body 12 has die-cut end face121.Described die-cut end face 121 is the most extended.Described fine and close extruded layer 13 in tabular and connects described hemisectionStructure 11 and shielding part body 12, have the surface 131 vertical with described die-cut end face 121.Described shielding part 1 is thick by 0.6mmTinplate (tin plate) constitute, the width of fine and close extruded layer 13 is 0.02mm～0.08mm, thickness be 0.02mm～0.1mm.In the present embodiment, the hemisection structure 11 of described shielding part 1 is by the first hemisection structure 111 and the second hemisection structure112 are constituted, and the depression outside towards shielding part body 12, the direction of the first hemisection structure 111, the second hemisection structure 112 is formed atThe corner of the first hemisection structure 111 and the depression inside (as shown in Figure 6) towards shielding part body 12, the direction.Described shielding part is originallyBody 12 generally body structure and there is end face 123, this end face 123 of mold and punching head 2 punching press and form described first hemisection structure111, the second hemisection structure 112 and corresponding fine and close extruded layer 13, concrete, described first hemisection structure 111 is formed at screenThis end face of shield body 12, described second hemisection structure 112 is then formed in the first hemisection structure 111, and described shielding part is originallyThe surface area of the end face 123 of body 12 is more than the surface area of the first hemisection structure 111, and the surface of described first hemisection structure 111The long-pending surface area more than the second hemisection structure 112, end face 123 height and the second hemisection structure 112 of described shielding part body 12Apical side height equal and less than the apical side height of the first hemisection structure 111, described fine and close extruded layer 13 includes being connected to firstThe fine and close extruded layer 13A of the first of hemisection structure 111 and shielding part body 12 and connect the first hemisection and 111 second hemisection structuresThe fine and close extruded layer 13B of the second of 112, connects the second fine and close extruded layer of the first hemisection structure 111 and the second hemisection structure 112The width of 13B is 0.02mm～0.08mm, and thickness is 0.02mm～0.1mm, connects the first hemisection structure 111 and shielding part bodyThe width of the fine and close extruded layer 13A of the first of 12 is 0.02mm～0.08mm, and thickness is 0.02mm～0.1mm.By arranging firstHemisection structure 111 and the second hemisection structure 112, and the first hemisection structure 111 is positioned at the corner of the second hemisection structure 112 so thatHemisection structure 11, in the case of guaranteeing shielding properties and difficult drop-off, is conveniently removed, such as, first with instrument to shielding part originallyBody 12 is internal to be tapped (action direction of power towards shielding part body 12 in), can open the second hemisection structure 112；The most again by workTool stretches in shielding part body 12 at the second hemisection structure 112, pries open an angle of the first hemisection structure 111, the most again along evenThe fine and close extruded layer 13 connecing the first hemisection structure 111 and shielding part body 12 removes the first hemisection structure 111, completes to removeThen internal parts, are detected by journey.The shielding part of the present invention not only make hemisection structure 11 easily remove and don'tCan easily drop as the hemisection structure that the tear face of prior art is constituted, and be able to ensure that shielding.