CN107866496A - A kind of lower cone forming tool and method for being used to interfere pumping nail double tapered bushing - Google Patents

A kind of lower cone forming tool and method for being used to interfere pumping nail double tapered bushing Download PDF

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Publication number
CN107866496A
CN107866496A CN201610858012.7A CN201610858012A CN107866496A CN 107866496 A CN107866496 A CN 107866496A CN 201610858012 A CN201610858012 A CN 201610858012A CN 107866496 A CN107866496 A CN 107866496A
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China
Prior art keywords
double tapered
tapered bushing
bushing
lower cone
blank
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CN201610858012.7A
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CN107866496B (en
Inventor
黄宏
刘风雷
赵庆云
梁福顺
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AVIC Manufacturing Technology Institute
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AVIC Beijing Aeronautical Manufacturing Technology Research Institute
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00Application of procedures in order to alter the diameter of tube ends
    • B21D41/04Reducing; Closing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • B21D37/12Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02Ejecting devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

A kind of lower cone forming tool and method for being used to interfere pumping nail double tapered bushing of disclosure of the invention, the forming tool include feed mechanism, lower cone builder, shedding mechanism;The automatic feed mechanism includes workpiece(91), deflector chute(92), vibrating tray(93);The lower cone builder includes lumen type face pressure head in double tapered bushing(1), double tapered bushing blank(2), double tapered bushing outer mold surface interlayer set(4), guide pin bushing(5), lower cone former(6);The shedding mechanism is discharge arm(7).The present invention is by designing a whole set of combined type fixture for forming, it is precisely controlled to shape mold cavity size, realize that mould matches with workpiece size, workpiece unstability is limited by outer mold surface in mould, using piecewise combination mould, the mode of spacing necking forming shapes lower cone, meets the shaping bored under 100 ° of countersunk heads or tack thin-walled interference bushing, and available for the technique for aircraft composite interference attachment structure of accurate control amount of interference.

Description

A kind of lower cone forming tool and method for being used to interfere pumping nail double tapered bushing
Technical field
The invention belongs to pumping nail class fastener thin-wall bush forming technique field, is related to cone shaping work under a kind of thin-wall bush Tool and method.
Background technology
Interference pumping nail fastening system is mainly used in the installation of composite structure, due to interfering the introducing of bushing, can be achieved Composite interference installation, improves anti-fatigue ability.It can realize that one side is installed for the not open position of aircaft configuration, can also be at 7 ° Ramp structure on realize installation, and good reliability is widely used in the isostructural connection of airframe, wing.Double tapered serves as a contrast Set is the key component for interfering pumping nail fastening system, and interference bush structure epicone is countersunk head, and it is 40 ° of cone angles to be bored under afterbody.Dry Relate in pumping nail installation process, the bootable nail set of lower cone of this kind of bush structure is plastically deformed, and is shaped big footing, is favourable In a kind of structure of interference pumping nail installation shaping, so as to improve staking quality conformance.
The related data to this kind of bushing external at present blocks, it is domestic for machining interference pumping nail double tapered bushing without Relevant report.At present, interfere pumping nail double tapered bushing to be used for the interference of composite structure to install, process under bushing and bore using rotation The method of pressure, afterbody is screwed into out cone angle, the deficiency of this kind of technology is that clamping is relatively complicated, it is impossible to automatic loading/unloading is realized, Processing efficiency is extremely low.Due to the particularity of double tapered bush structure, and to realize, precisely interference installation, bushing wall thickness are only 0.25mm, when shaping lower bore, control is improper, and unstability easily occurs, and ovalizing deflection occurs for bushing straight wall portion, and epicone angle faces produce Distortion, so as to cause dimension overproof.
In view of the shortcomings of the prior art, the present invention proposes a kind of forming tool and method of double tapered bushing.
The content of the invention
The purpose of the present invention:Interfere bushing to meet actual use demand, processing qualified double tapered, design one kind is used for Interfere pumping nail double tapered bushing lower cone forming tool and method, realize 100 ° of countersunk heads or tack thin-walled interference bushing under bore into Shape, solve the problems, such as thin-wall bush shaping unstability, of poor quality, off-dimension, improve staking forming quality uniformity.
To achieve these goals, present invention employs following technical scheme:
A kind of lower cone forming tool for being used to interfere pumping nail double tapered bushing(As shown in Figure 1), including automatic feed mechanism, lower cone Builder, shedding mechanism;The automatic feed mechanism(As shown in Figure 3, Figure 4)Including workpiece 91, deflector chute 92, vibrating tray 93;The lower cone builder(As shown in Figure 2)Including lumen type face pressure in double tapered bushing is first 1, double tapered bushing blank 2(Such as Shown in Fig. 6), double tapered bushing outer mold surface interlayer set 4, guide pin bushing 5, it is lower cone former 6;The shedding mechanism(Such as Figure 11)For discharge arm 7;Coaxially loaded in guide pin bushing 5, the double tapered bushing blank 2 is pacified for the double tapered bushing outer mold surface interlayer set 4 and lower cone former 6 On the interior lumen type face of double tapered bushing outer mold surface interlayer set 4, lumen type face pressure first 1 is from upper past in the double tapered bushing The double tapered bushing blank 2 and co-axial cooperation installation are pushed down into, it is cloudy that the discharge arm 7 is directed at the lower cone from the bottom up The interior lumen type face of mould 6.
Lumen type face pressure first 1 in the double tapered bushing(As described in Figure 5)Including grip shank 11, epicone confined planes 12, epicone Face 13, head and bar portion switching fillet 14, bar portion 15, the lower conical surface 16, bar portion and lower conical surface switching fillet 17, guiding bar 18, into Double tapered bushing 3 after shape is as shown in Figure 7;It is big that the excircle dimension of the epicone confined planes 12 is more than double tapered bushing blank epicone Mouth is cylindrical;The angle of the upper conical surface 13 is identical with angle faces 21 in double tapered bushing blank;Justify with bar portion switching on the head The size at angle 14 is identical with double tapered bushing blank filleted corner 22;The bar portion 15 is slide fit with lumen type face 23 in double tapered bushing Conjunction relation, and limit lumen type face 23 in double tapered bushing and inwardly deform;When being bored under shaping under double tapered bushing blank inner circle End face 24 contacts with bar portion with lower conical surface switching fillet 17, plays a part of rounding off, shapes under double tapered bushing in cone Fillet 31;The lower conical surface 16 shapes cone angle binding face 32 under double tapered bushing;The guiding bar 18 is interior with lower cone former 6 Lumen type face 65 contacts, when adjusting die location, to make lumen type face pressure first 1 in double tapered bushing keep coaxial with lower cone former 6, Play a part of positioning and guiding;
The double tapered bushing outer mold surface interlayer set 4(As shown in Figure 8), double tapered bushing epicone supporting surface 41 and double tapered bushing The conical surface 25 is bonded on blank;The size and the size phase of double tapered bushing blank epicone fillet 26 of epicone and bar portion switching fillet 42 Together;Prevent double tapered bushing blank bar portion 27 from occurring when boring shaping under the acting as of double tapered bushing bar portion outer mold surface spacing hole 43 Deformation;The effect of double tapered bushing outer mold surface interlayer set 4 is the overall dimensional deformation for limiting double tapered bushing blank 2;By bipyramid Degree bushing outer mold surface interlayer set 4 is designed to segmented with lower cone former 6, it is therefore intended that shapes the double tapered bushing of different interlayers When, double tapered bushing outer mold surface interlayer set 4 can be only changed, saves die cost, and double tapered bushing outer mold surface can be realized The quick-replaceable of interlayer set 4, saves the regulation mould time;
The lower cone former 6 is as shown in Figure 10, and double tapered bushing interlayer covers lower surface 45 and contacted with lower cone former upper surface 61, double 34 upward 2mm positions are die joint at taper socket cone angle switching, and selection is easy to the lower cone demoulding for die joint herein;Straight wall hole 62 Height be 2mm, the lower end in contact with double tapered bushing blank bar portion 27, be allowed to smoothly enter straight wall hole 62, be easy to it is lower cone into Shape;Cone switching fillet 63 under former, when lower cone shapes, the cylindrical lower surface 28 of double tapered bushing blank and cone switching fillet under former 63 contacts, the fillet can be such that the cylindrical lower surface 28 of double tapered bushing blank is smoothly moved to conical surface direction, play rounding off Effect, it is stuck can to prevent that the cylindrical lower surface 28 of double tapered bushing blank from occurring during moving;The angle in lower coning angle face 64 It is identical with double tapered bushing cone angle switching 34 angle;
For the guide pin bushing 5 as shown in figure 9, when being bored under shaping, double tapered bushing outer mold surface interlayer set 4 and lower cone former 6 are loaded on guide pin bushing 5 Interior, outer mold surface interlayer set periphery 44 contacts with lumen type face 51 in guide pin bushing, lower cone former periphery 66 and lumen type face 51 in guide pin bushing Contact;The effect of guide pin bushing 5 is to limit double tapered bushing outer mold surface interlayer set 4 and the lower cone radial displacement of former 6;
The discharge arm 7 is as shown in figure 11, completes after cone shaping, to promote the lower end 72 of discharge arm 7, discharge arm under double tapered bushing Upper surface 71 contacted with the lower surface of double tapered bushing 3 after shaping, ejected, complete discharging.
The invention also discloses a kind of lower cone manufacturing process for being used to interfere pumping nail double tapered bushing, it is shrunk to using punching Bored under shape, mould is designed mould using segmentation, realizes automatic loading/unloading, improves processing efficiency.
Process steps are as follows:
The first step:Debug and bore former under pumping nail double tapered bushing for interfering, by the double tapered bushing inner chamber of corresponding specification Type face pressure first 1 is clamped in equipment, and double tapered bushing blank 2 is arranged on feed mechanism.
Second step:The lower cone builder of adjustment, first fixes guide pin bushing 5, successively by lower cone former 6 and double tapered bushing interlayer Set 4 loads guide pin bushing 5.
3rd step:The top 71 of discharge arm is exited to apart from the lower surface of lower cone former 6 and keeps the position flushed.
4th step:Die cavity pressure head 1 in double tapered bushing is adjusted, makes itself and double tapered bushing outer mold surface interlayer set 4 and lower cone Former 6 keeps coaxial, and using the guiding bar 18 of die cavity pressure head 1 in double tapered bushing, guiding bar 18 is deeply descended in cone former Lumen type face 65, make in double tapered bushing die cavity pressure head 1 and lower cone former 6 coaxial, it is ensured that die cavity pressure head 1 exists in double tapered bushing During moving downward, keep coaxial with lower cone former 6, prevent the lower cone bias shaped.
5th step:Adjust in double tapered bushing after the axiality of die cavity pressure head 1 and lower cone former 6, by double tapered bushing Interior die cavity pressure head 1 is exited to original position, the i.e. lower surface of guiding bar 18 and the upper surface of double tapered bushing outer mold surface interlayer set 4 The distance between be more than double tapered bushing entire length, be easy to feed mechanism by double tapered bushing blank be sent into mould.
6th step:Double tapered bushing blank 2 loads double tapered bushing outer mold surface interlayer set 4 under the drive of feed mechanism Interior, double tapered bushing blank bar portion 27 contacts with double tapered bushing bar portion outer mold surface spacing hole 43.
7th step:Die cavity pressure head 1 moves downward in double tapered bushing, the upper conical surface 13 and angle faces in double tapered bushing blank 21 contacts, drive double tapered bushing blank 2 to be moved downward along double tapered bushing outer mold surface spacing hole 43, in the process, bar Portion 15 contacts with lumen type face 23 in double tapered bushing, and bar portion switching fillet 14 contacts with double tapered bushing blank filleted corner 22, protects The interior lumen type face of card double tapered bushing blank is bonded completely with pressure head, can prevent its internal unstability.
8th step:After die cavity pressure head 1 is bonded with double tapered bushing blank 2 in double tapered bushing, continue to move downward, bipyramid The conical surface 25 contacts with double tapered bushing epicone supporting surface 41 on degree bushing blank, double tapered bushing blank epicone fillet 26 and bar portion Switching fillet 42 contacts;After lumen type face 23 enters lower cone former pilot hole 62 in double tapered bushing, lower cone shaping is initially entered Process;The cylindrical lower surface 28 of double tapered bushing blank by boring switching fillet 63 under former, along lower cone former cone angle face 64 into Shape goes out lower cone;In the process, double tapered bushing blank inner circle lower surface 24 is moved along cone angle face 16 under pressure head, ensures bipyramid Spend and forming dimension precision is bored under bushing.
9th step:Shape after being bored under double tapered bushing, die cavity pressure head 1 in double tapered bushing is first exited into mould to initial Position, discharge arm 7 is pushed up, now, discharge arm upper surface 71 contacts with the lower surface of double tapered bushing 3, is ejected mould Tool, complete discharging;So far a loading and unloading and the forming cycle process bored under double tapered bushing are completed.
Beneficial effects of the present invention:By designing a whole set of combined type fixture for forming, shape mold cavity chi is precisely controlled to It is very little, realize that mould matches with workpiece size, workpiece unstability is limited by outer mold surface in mould, it is spacing using piecewise combination mould The mode of necking forming shapes lower cone, meets the shaping bored under 100 ° of countersunk heads or tack thin-walled interference bushing, and available for essence The really technique for aircraft composite interference attachment structure of control amount of interference, to improve the joint fatigue life-span;By the way of punching closing in, Using piecewise combination mould, mould die joint will be arranged at cone angle and straight wall switching, shape cavity dimension be precisely controlled to, with limit The mode of position necking forming gradually shapes lower cone, is advantageous to cone angle shaping, and the workpiece demoulding after convenient shaping;In bushing Portion's limit mold tip designs have guide post, it is therefore intended that are easy to centering during adjustment upper/lower die axiality, to improve processing essence Degree;Feeding device carries out feeding using vibrating tray, and blanking device is arranged on below former, after completing lower cone shaping, blanking top Bar ejects workpiece from former, so as to improve processing efficiency.
The present invention to enter beans-and bullets shooter as described below in detail:
1st, process automatic loading/unloading can be realized using automatic feed mechanism, shedding mechanism, improves processing efficiency, reduce into This;The problem of unstability yielding for thin-walled double tapered bushing clamping, accurately inside and outside type cavity mould progress is spacing for design size Deformation control, so as to effectively solve the problem of shaping unstability, dimension overproof;The lower cone of shaping is passed through by the way of taper necking The cavity dimension of inner conical surface and male cone (strobilus masculinus) is controlled to ensure the forming dimension of lower cone.
2nd, lumen type face pressure head lower end design transition fillet in double tapered bushing, double tapered bushing outer mold surface interlayer set inner chamber are set Knuckle is counted, is advantageous to cone angle rounding off, prevents from stuck causing material stacking;To improve the quality for shaping lower cone, double Lumen type face pressure head lower end Design guidance bar in taper socket, when adjusting die location, it is easy to adjust lumen type in double tapered bushing The axiality of face pressure head and lower cone former, plays a part of positioning and guiding.
3rd, guiding double tapered interference bushing is played in the straight wall hole that the inner chamber upper end design length of lower cone former is 2mm, the hole The lower end of blank enters lower cone former, is easy to cone angle to shape;By cone under double tapered bushing with being designed as upper and lower mould at straight wall switching Have die joint, be easy to shaping dies to be stripped;Double tapered bushing outer mold surface interlayer covers carries out split design with lower cone former, for not Double tapered interference bushing with interlayer is conveniently replaceable mould, saves the adjustment mould time, improves efficiency, and save cost;Guide pin bushing Double tapered bushing outer mold surface interlayer set and lower cone former are subjected to radial displacement limitation, improve the axiality of shaping dies.
Brief description of the drawings
Fig. 1 is the structural representation that forming tool is bored under interference pumping nail double tapered bushing;
Fig. 2 is the structural representation of lower cone builder and shedding mechanism;
Fig. 3 is the front view schematic diagram of automatic feed mechanism;
Fig. 4 is the top view illustration of automatic feed mechanism;
Fig. 5 is the structural representation of lumen type face pressure head in double tapered bushing;
Fig. 6 is the structural representation of double tapered bushing blank;
Fig. 7 is the structural representation of the double tapered bushing after shaping;
Fig. 8 is the structural representation of double tapered bushing outer mold surface interlayer set;
Fig. 9 is the structural representation of guide pin bushing;
Figure 10 is the structural representation of lower cone former;
Figure 11 is the structural representation of discharge arm.
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 Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
After corresponding specification interference pumping nail double tapered bushing die for blank is chosen, equipment debugging is carried out, is entered by forming step The lower cone shaping of row.
Embodiment:
Embodiment 1:
For so that -5 specifications are interfered and bore shaping under pumping nail double tapered bushing as an example, realized by following steps:
The first step:Commissioning device includes feed mechanism, lower cone builder and shedding mechanism, selects the lower cone finishing die of -5 specifications Tool, lumen type face pressure head in double tapered bushing is clamped in equipment, double tapered bushing blank loads mould by feed mechanism.
Second step:The lower cone builder of adjustment, first fixes guide pin bushing 5, successively by lower cone former 6 and double tapered bushing interlayer Set 4 loads guide pin bushing 5.
3rd step:The top 71 of shedding mechanism is exited to apart from the lower surface of lower cone former 6 and keeps the position flushed.
4th step:Die cavity pressure head 1 in double tapered bushing is adjusted, makes itself and double tapered bushing outer mold surface interlayer set 4 and lower cone Former 6 keeps coaxial, and using the guiding bar 18 of die cavity pressure head 1 in double tapered bushing, guiding bar 18 is deeply descended into cone former 6 Interior lumen type face 65, make die cavity pressure head 1 and lower cone former 6 in double tapered bushing coaxial, it is ensured that die cavity pressure head 1 in double tapered bushing During moving downward, keep coaxial with lower cone former 6, prevent the lower cone bias shaped.
5th step:Adjust in double tapered bushing after the axiality of die cavity pressure head 1 and lower cone former 6, by double tapered bushing Interior die cavity pressure head 1 is exited to original position, i.e., between the lower surface of guiding bar 18 and the upper surface of double tapered bushing interlayer set 4 Distance is more than the entire length of double tapered bushing, is easy to feed mechanism that double tapered bushing blank 2 is sent into mould.
6th step:Double tapered bushing blank 2 loads under the drive of feed mechanism in interlayer set 4, double tapered bushing blank Bar portion 27 contacts with double tapered bushing bar portion outer mold surface spacing hole 43.
7th step:Die cavity pressure head 1 moves downward in double tapered bushing, the interior angle of the upper conical surface 13 and double tapered bushing blank 2 Degree face 21 contacts, and drives double tapered bushing blank to be moved downward along double tapered bushing bar portion outer mold surface spacing hole 43, herein mistake Cheng Zhong, bar portion 15 contact with lumen type face 23 in double tapered bushing, bar portion switching fillet 14 and double tapered bushing blank filleted corner 22 Contact, ensure that the interior lumen type face of double tapered bushing blank is bonded completely with pressure head, its internal unstability can be prevented.
8th step:After die cavity pressure head 1 is bonded with double tapered bushing blank 2 in double tapered bushing, continue to move downward, bipyramid The conical surface 25 contacts with double tapered bushing epicone supporting surface 41 on degree bushing blank, double tapered bushing blank epicone fillet 26 and bar portion Switching fillet 42 contacts;After lumen type face 23 enters lower cone former pilot hole 62 in double tapered bushing, lower cone shaping is initially entered Process;The cylindrical lower surface 28 of double tapered bushing blank by boring switching fillet 63 under former, along lower cone former cone angle face 64 into Shape goes out lower cone;In the process, double tapered bushing blank inner circle lower surface 24 is moved along cone angle face 16 under pressure head, ensures bipyramid Spend and forming dimension precision is bored under bushing.
9th step:Shape after being bored under double tapered bushing, die cavity pressure head 1 in double tapered bushing is first exited into mould to initial Position, shedding mechanism 7 is pushed up, now, discharge arm upper surface 71 contacts with the lower surface of double tapered bushing 3, is ejected Mould, complete discharging;So far complete to bore forming process under -5 specification double tapered bushings.
Embodiment 2:
For so that -6 specifications are interfered and bore shaping under pumping nail double tapered bushing as an example, realized by following steps:
The first step:Commissioning device includes feed mechanism, lower cone builder and shedding mechanism, selects the lower cone finishing die of -6 specifications Tool, lumen type face pressure head in double tapered bushing is clamped in equipment, double tapered bushing blank loads mould by feed mechanism.
Second step:The lower cone builder of adjustment, first fixes guide pin bushing 5, successively by lower cone former 6 and double tapered bushing interlayer Set 4 loads guide pin bushing 5.
3rd step:The upper surface 71 of shedding mechanism is exited to apart from the lower surface of lower cone former 6 and keeps the position flushed Put.
4th step:Die cavity pressure head 1 in double tapered bushing is adjusted, makes itself and double tapered bushing outer mold surface interlayer set 4 and lower cone Former 6 keeps coaxial, and using the guiding bar 18 of die cavity pressure head 1 in double tapered bushing, guiding bar 18 is deeply descended into cone former 6 Interior lumen type face 65, make die cavity pressure head 1 and lower cone former 6 in double tapered bushing coaxial, it is ensured that die cavity pressure head 1 in double tapered bushing During moving downward, keep coaxial with lower cone former 6, prevent the lower cone bias shaped.
5th step:Adjust in double tapered bushing after the axiality of die cavity pressure head 1 and lower cone former 6, by double tapered bushing Interior die cavity pressure head 1 is exited to original position, i.e., between the lower surface of guiding bar 18 and the upper surface of double tapered bushing interlayer set 4 Distance is more than the entire length of double tapered bushing, is easy to feed mechanism that double tapered bushing blank 2 is sent into mould.
6th step:Double tapered bushing blank 2 loads under the drive of feed mechanism in interlayer set 4, double tapered bushing blank Bar portion 27 contacts with double tapered bushing bar portion outer mold surface spacing hole 43.
7th step:Die cavity pressure head 1 moves downward in double tapered bushing, the interior angle of the upper conical surface 13 and double tapered bushing blank 2 Degree face 21 contacts, and drives double tapered bushing blank to be moved downward along double tapered bushing bar portion outer mold surface spacing hole 43, herein mistake Cheng Zhong, bar portion 15 contact with lumen type face 23 in double tapered bushing, the filleted corner of bar portion switching fillet 14 and double tapered bushing blank 2 22 contacts, ensure that the interior lumen type face of double tapered bushing blank is bonded completely with pressure head, its internal unstability can be prevented.
8th step:After die cavity pressure head 1 is bonded with double tapered bushing blank 2 in double tapered bushing, continue to move downward, bipyramid The conical surface 25 contacts with double tapered bushing epicone supporting surface 41 on degree bushing blank, double tapered bushing blank epicone fillet 26 and bar portion Switching fillet 42 contacts;After lumen type face 23 enters lower cone former pilot hole 62 in double tapered bushing, lower cone shaping is initially entered Process;The cylindrical lower surface 28 of double tapered bushing blank by boring switching fillet 63 under former, along lower cone former cone angle face 64 into Shape goes out lower cone;In the process, double tapered bushing blank inner circle lower surface 24 is moved along cone angle face 16 under pressure head, ensures bipyramid Spend and forming dimension precision is bored under bushing.
9th step:Shape after being bored under double tapered bushing, die cavity pressure head 1 in double tapered bushing is first exited into mould to initial Position, discharge arm 7 is pushed up, now, the upper surface 71 of discharge arm 7 contacts with double tapered bushing lower surface, is ejected mould Tool, complete discharging;So far complete to bore forming process under -6 specification double tapered bushings.
Embodiment 3:
For so that -8 specifications are interfered and bore shaping under pumping nail double tapered bushing as an example, realized by following steps:
The first step:Commissioning device includes feed mechanism, lower cone builder and shedding mechanism, selects the lower cone finishing die of -8 specifications Tool, lumen type face pressure head in double tapered bushing is clamped in equipment, double tapered bushing blank loads mould by feed mechanism.
Second step:The lower cone builder of adjustment, first fixes guide pin bushing 5, successively by lower cone former 6 and double tapered bushing interlayer Set 4 loads guide pin bushing 5.
3rd step:The upper surface 71 of discharge arm is exited to apart from the lower surface of lower cone former 6 and keeps the position flushed.
4th step:Die cavity pressure head 1 in double tapered bushing is adjusted, makes itself and double tapered bushing outer mold surface interlayer set 4 and lower cone Former 6 keeps coaxial, and using the guiding bar 18 of die cavity pressure head 1 in double tapered bushing, guiding bar 18 is deeply descended into cone former 6 Interior lumen type face 65, make die cavity pressure head 1 and lower cone former 6 in double tapered bushing coaxial, it is ensured that die cavity pressure head 1 in double tapered bushing During moving downward, keep coaxial with lower cone former 6, prevent the lower cone bias shaped.
5th step:Adjust in double tapered bushing after the axiality of die cavity pressure head 1 and lower cone former 6, by double tapered bushing Interior die cavity pressure head 1 is exited to original position, i.e., between the lower surface of guiding bar 18 and the upper surface of double tapered bushing interlayer set 4 Distance is more than the entire length of double tapered bushing, is easy to feed mechanism that double tapered bushing blank is sent into mould.
6th step:Double tapered bushing blank 2 loads under the drive of feed mechanism in interlayer set 4, double tapered bushing blank Bar portion 27 contacts with double tapered bushing bar portion outer mold surface spacing hole 43.
7th step:Die cavity pressure head 1 moves downward in double tapered bushing, the upper conical surface 13 and angle faces in double tapered bushing blank 21 contacts, drive double tapered bushing blank to be moved downward along double tapered bushing bar portion outer mold surface spacing hole 43, in the process, Bar portion 15 contacts with lumen type face 23 in double tapered bushing, and bar portion switching fillet 14 contacts with double tapered bushing blank filleted corner 22, Ensure that the interior lumen type face of double tapered bushing blank is bonded completely with pressure head, its internal unstability can be prevented.
8th step:After die cavity pressure head 1 is bonded with double tapered bushing blank 2 in double tapered bushing, continue to move downward, bipyramid The conical surface 25 contacts with double tapered bushing epicone supporting surface 41 on degree bushing blank, double tapered bushing blank epicone fillet 26 and bar portion Switching fillet 42 contacts;After lumen type face 23 enters lower cone former pilot hole 62 in double tapered bushing, lower cone shaping is initially entered Process;The cylindrical lower surface 28 of double tapered bushing blank by boring switching fillet 63 under former, along lower cone former cone angle face 64 into Shape goes out lower cone;In the process, double tapered bushing blank inner circle lower surface 24 is moved along cone angle face 16 under pressure head, ensures bipyramid Spend and forming dimension precision is bored under bushing.
9th step:Shape after being bored under double tapered bushing, die cavity pressure head 1 in double tapered bushing is first exited into mould to initial Position, discharge arm 7 is pushed up, now, discharge arm upper surface 71 contacts with double tapered bushing lower surface, is ejected mould Tool, complete discharging;So far complete to bore forming process under -8 specification double tapered bushings.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.

Claims (7)

1. a kind of be used to interfere the lower cone forming tool of pumping nail double tapered bushing, it is characterised in that including automatic feed mechanism, under Bore builder, shedding mechanism;The automatic feed mechanism includes workpiece(91), deflector chute(92), vibrating tray(93);It is described Lower cone builder includes lumen type face pressure head in double tapered bushing(1), double tapered bushing blank(2), double tapered bushing outer mold surface Interlayer set(4), guide pin bushing(5), lower cone former(6);The shedding mechanism is discharge arm(7);The double tapered bushing outer mold surface folder Layer set(4)With lower cone former(6)Coaxially it is loaded on guide pin bushing(5)It is interior, the double tapered bushing blank(2)Served as a contrast installed in the double tapered Cover outer mold surface interlayer set(4)Interior lumen type face on, lumen type face pressure head in the double tapered bushing(1)It is pressed into from top to bottom described double Taper socket blank(2)And co-axial cooperation installation, the discharge arm(7)The lower cone former is directed at from the bottom up(6)'s Interior lumen type face.
2. the lower cone forming tool according to claim 1 for being used to interfere pumping nail double tapered bushing, it is characterised in that described Lumen type face pressure head in double tapered bushing(1)Including grip shank(11), epicone confined planes(12), the upper conical surface(13), head and bar portion Switching fillet(14), bar portion(15), the lower conical surface(16), bar portion and the lower conical surface switching fillet(17), guiding bar(18);The epicone Confined planes(12)Excircle dimension be more than the big mouth of double tapered bushing blank epicone it is cylindrical;The upper conical surface(13)Angle and bipyramid Spend angle faces in bushing blank(21)It is identical;The head and bar portion switching fillet(14)Size and double tapered bushing blank in Fillet(22)It is identical;The bar portion(15)With lumen type face in double tapered bushing(23)For sliding fit relation, and limit double tapered lining Lumen type face in set(23)Inwardly deform;When being bored under shaping, double tapered bushing blank inner circle lower surface(24)With bar portion with Conical surface switching fillet(17)Contact, plays a part of rounding off, shapes and bore filleted corner under double tapered bushing(31);Under described The conical surface(16)Shape cone angle binding face under double tapered bushing(32);The guiding bar(18)With lower cone former(6)Interior lumen type Face(65)Contact, makes lumen type face pressure head in double tapered bushing(1)With lower cone former(6)Keep coaxial.
3. the lower cone forming tool according to claim 1 for being used to interfere pumping nail double tapered bushing, it is characterised in that described Double tapered bushing outer mold surface interlayer set(4)In, double tapered bushing epicone supporting surface(41)With the conical surface on double tapered bushing blank (25)Fitting;Epicone and bar portion switching fillet(42)Size and double tapered bushing blank epicone fillet(26)Size is identical;It is double Taper socket bar portion outer mold surface spacing hole(43)Acting as under bore shaping when prevent double tapered bushing blank bar portion(27)Occur Deformation;The double tapered bushing outer mold surface interlayer set(4)With lower cone former(6)Segmented is designed to, shapes the double of different interlayers During taper socket, double tapered bushing outer mold surface interlayer set is only changed(4).
4. the lower cone forming tool according to claim 1 for being used to interfere pumping nail double tapered bushing, it is characterised in that described Lower cone former(6)In, the double tapered bushing interlayer covers lower surface(45)With lower cone former upper surface(61)Contact, double tapered lining Cover at cone angle switching(34)Upward 2mm positions are die joint, are easy to the lower cone demoulding;Straight wall hole(62)Height be 2mm, with bipyramid Spend bushing blank bar portion(27)Lower end in contact, be allowed to smoothly enter straight wall hole(62), it is easy to lower cone shaping;During lower cone shaping, The cylindrical lower surface of double tapered bushing blank(28)With cone switching fillet under former(63)Contact, the fillet can make double tapered bushing hair The cylindrical lower surface of base(28)Smoothly moved to conical surface direction, play a part of rounding off;Lower coning angle face(64)Angle with At double tapered bushing cone angle switching(34)Angle it is identical.
5. the lower cone forming tool according to claim 1 for being used to interfere pumping nail double tapered bushing, it is characterised in that shaping During lower cone, double tapered bushing outer mold surface interlayer set(4)With lower cone former(6)Loaded on guide pin bushing(5)It is interior, outer mold surface interlayer set periphery (44)With lumen type face in guide pin bushing(51)Contact, lower cone former periphery(66)With the interior lumen type face of guide pin bushing(51)Contact;Guide pin bushing(5) Effect be limit double tapered bushing outer mold surface interlayer set(4)With lower cone former(6)Radial displacement.
6. the lower cone forming tool according to claim 1 for being used to interfere pumping nail double tapered bushing, it is characterised in that complete Under double tapered bushing after cone shaping, discharge arm lower end is promoted(72), discharge arm upper surface(71)With the double tapered bushing after shaping (3)Lower surface contacts, and is ejected, and completes discharging.
7. a kind of lower cone manufacturing process for being used to interfere pumping nail double tapered bushing, the lower cone of shaping is shunk using punching, mould uses Segmentation is designed mould, it is characterised in that process steps are as follows:
(1)The first step:Debug and bore former under pumping nail double tapered bushing for interfering, by the double tapered bushing of corresponding specification Lumen type face pressure head(1)It is clamped in equipment, double tapered bushing blank(2)On feed mechanism;
(2)Second step:The lower cone builder of adjustment, first by guide pin bushing(5)It is fixed, successively by lower cone former(6)And double tapered bushing Interlayer set(4)Load guide pin bushing(5);
(3)3rd step:By discharge arm upper surface(71)Exit to apart from lower cone former(6)Lower surface keep the position that flushes;
(4)4th step:Adjust die cavity pressure head in double tapered bushing(1), utilize die cavity pressure head in double tapered bushing(1)Guiding bar (18), by guiding bar(18)Deeply lumen type face in lower cone former(65), make die cavity pressure head in double tapered bushing(1)With lower cone former (6)Coaxially, the lower cone bias shaped is prevented;
(5)5th step:Adjust die cavity pressure head in double tapered bushing(1)With lower cone former(6)Axiality after, double tapered is served as a contrast Die cavity pressure head in set(1)Exit to original position, i.e. guiding bar(18)Lower surface and double tapered bushing outer mold surface interlayer set(4) The distance between upper surface be more than the entire length of double tapered bushing, be easy to feed mechanism by double tapered bushing blank(2)Send Enter mould;
(6)6th step:Double tapered bushing blank(2)Load double tapered bushing outer mold surface interlayer set under the drive of feed mechanism (4)It is interior, double tapered bushing blank bar portion(27)With double tapered bushing bar portion outer mold surface spacing hole(43)Contact;
(7)7th step:Die cavity pressure head in double tapered bushing(1)Move downward, the upper conical surface(13)With double tapered bushing blank interior angle Degree face(21)Contact, drive double tapered bushing blank(2)Along double tapered bushing bar portion outer mold surface spacing hole(43)Move downward, In the process, bar portion(15)With lumen type face in double tapered bushing(23)Contact, bar portion switching fillet(14)With double tapered bushing Blank filleted corner(22)Contact, ensure that the interior lumen type face of double tapered bushing blank is bonded completely with pressure head, prevent its internal unstability;
(8)8th step:Die cavity pressure head in double tapered bushing(1)With double tapered bushing blank(2)After fitting, continue to move downward, The conical surface on double tapered bushing blank(25)With double tapered bushing epicone supporting surface(41)Contact, double tapered bushing blank epicone fillet (26)With bar portion switching fillet(42)Contact;When lumen type face in double tapered bushing(23)Into lower cone former pilot hole(62)Afterwards, Initially enter lower cone forming process;The cylindrical lower surface of double tapered bushing blank(28)By boring switching fillet under former(63), edge Down cone former cone angle face(64)Shape lower cone;In the process, double tapered bushing blank inner circle lower surface(24)Along pressure The lower cone angle face of head(16)Motion, ensure to bore forming dimension precision under double tapered bushing;
(9)9th step:Shape after being bored under double tapered bushing, first by die cavity pressure head in double tapered bushing(1)Mould is exited to first Beginning position, by discharge arm(7)Push up, now, discharge arm upper surface(71)With double tapered bushing(3)Lower surface contacts, will Its ejection die, complete discharging;So far a loading and unloading and the forming cycle process bored under double tapered bushing are completed.
CN201610858012.7A 2016-09-28 2016-09-28 It is a kind of for interfering the lower cone forming tool and method of pumping nail double tapered bushing Active CN107866496B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108636913A (en) * 2018-07-26 2018-10-12 天津鹏宇兴业五金制品有限公司 A kind of steel nail cleaning device

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JP2004122189A (en) * 2002-10-03 2004-04-22 Sango Co Ltd Pipe contracting method and pipe contracting device
CN1927498A (en) * 2006-08-30 2007-03-14 赵铎 Radius variation and mouth reducing method for radius-variable short tube
CN101754820A (en) * 2007-06-29 2010-06-23 Gkn动力传动系统国际有限责任公司 Device and method for the axial forming of elongated hollow bodies
CN104128503A (en) * 2014-07-23 2014-11-05 成都市龙泉驿区齐盛机械厂 Self-return necking die
CN104475583A (en) * 2014-12-21 2015-04-01 重庆燕蓝科技有限公司 Necking die for pipe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004122189A (en) * 2002-10-03 2004-04-22 Sango Co Ltd Pipe contracting method and pipe contracting device
CN1927498A (en) * 2006-08-30 2007-03-14 赵铎 Radius variation and mouth reducing method for radius-variable short tube
CN101754820A (en) * 2007-06-29 2010-06-23 Gkn动力传动系统国际有限责任公司 Device and method for the axial forming of elongated hollow bodies
CN104128503A (en) * 2014-07-23 2014-11-05 成都市龙泉驿区齐盛机械厂 Self-return necking die
CN104475583A (en) * 2014-12-21 2015-04-01 重庆燕蓝科技有限公司 Necking die for pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108636913A (en) * 2018-07-26 2018-10-12 天津鹏宇兴业五金制品有限公司 A kind of steel nail cleaning device

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