CN103447340A - Pre-diverging-wedge pressing precision forming die and disc forming method - Google Patents

Pre-diverging-wedge pressing precision forming die and disc forming method Download PDF

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Publication number
CN103447340A
CN103447340A CN2013103772540A CN201310377254A CN103447340A CN 103447340 A CN103447340 A CN 103447340A CN 2013103772540 A CN2013103772540 A CN 2013103772540A CN 201310377254 A CN201310377254 A CN 201310377254A CN 103447340 A CN103447340 A CN 103447340A
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China
Prior art keywords
die
wedge
diameter
pressing mold
punch
Prior art date
Application number
CN2013103772540A
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Chinese (zh)
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CN103447340B (en
Inventor
郑顺奇
朱秀荣
陈刚
汤进军
国宁
周灵展
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中国兵器科学研究院宁波分院
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Priority to CN201310377254.0A priority Critical patent/CN103447340B/en
Publication of CN103447340A publication Critical patent/CN103447340A/en
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Publication of CN103447340B publication Critical patent/CN103447340B/en

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Abstract

The invention provides an extruding terrace die which is formed by assembling a pre-diverging die, a wedge pressing die and a terrace die core shaft. Firstly, the pre-diverging die is used for realizing the pre-distribution of metal plastic flow volumes, reducing the remain of forged pieces and increasing the utilization rate of materials; the wedge pressing die compels a metal to plastically flow under the action of the wedge pressing force, and as the plastic flow process of the metal is added, the influence on the mechanical properties of the formed part caused by machining is avoided and the purpose of improving the mechanical properties of the formed part is achieved; the terrace die core shaft and a concave die are combined to form a closed cavity so as to restrain the further radial flow of the deformed metal, as a result, the contact area between the terrace die and the deformed metal is reduced and the extruding forming force is reduced.

Description

A kind of pre-shunting-wedge is pressed precision forming mold and disc manufacturing process
Technical field
The present invention relates to field of machining and machinebuilding technology, be specially a kind of pre-shunting-wedge and press precision forming mold and disc manufacturing process.
Background technology
Extrusion forming process has the shape of changing modified function, is one of important forming technology of hardware manufacture.The structure of extruding punch directly determines size and shaping energy consumption, extrusion forming quality and mechanical property, the extrusion allowance of force in extrusion and shapes efficiency, so the shaping dies of Labor-saving high-efficiency is the target that the art research and designer pursue always.
Fig. 1 and the structural representation that Figure 2 shows that the disk product.In prior art, adopt solid bar jumping-up, forge to squeeze and follow-up large surplus machine cut is processed three passages and is shaped, forming process is shown in schematic diagram 3, that is: at first solid bar is upset as to cake, adopt on this basis the flat punch upsetting squeeze cake blank large surplus forging stock material that is shaped, finally by machine cut, shape the disk product.While adopting flat punch upsetting squeeze, punch and cake blank contact area are large, and plastic force is larger, and equipment tonnage is had relatively high expectations, energy consumption is large; The allowance of the disk product of upsetting extrusion is large, and the machining cycle is long, and stock utilization is low, and machining of higher while of manufacturing cost is destroyed the mechanical property that the upsetting squeeze metal streamline affects product.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, propose a kind of pre-shunting-wedge and pressed precision forming mold and disc manufacturing process, its shunt in advance-wedge presses precision forming mold mainly by pre-divergent die, wedge pressing mold, punch mandrel and template, to form the extruding punch, wherein template is cylinder or cuboid, it is characterized in that: the punch mandrel is comprised of two different cylinder one of diameter, and wherein the diameter of small-diameter circular cylinder is identical with the aperture of extrusion molding disk product; The wedge pressing mold is in the outside of punch mandrel, it is that an end face is plane, the other end hollow circular cylinder consistent with the surface configuration of extrusion molding disk product, the step-like through hole that its hollow space is total to central axis, coordinates with the punch insert shaft clearance with cylinder, and the diameter of the large diameter cylinder of the corresponding punch mandrel in the aperture of planar side, planar side also offer at least 4 with the fixing bolt hole of use of template; Pre-divergent die is in the outside of wedge pressing mold, it is also that an end face is plane, the other end hollow circular cylinder consistent with the surface configuration of extrusion molding disk product, its hollow space and cylinder altogether central axis, with the through hole of wedge pressing mold matched in clearance, planar side also offer at least 4 with the fixing bolt hole of use of template, the diameter of the through hole of described pre-divergent die is less than or equal to the internal diameter of hollow blank, and the external diameter of described pre-divergent die is slightly larger than the external diameter of extrusion molding disk product;
First the punch mandrel is passed so that punch mandrel and wedge pressing mold matched in clearance from the step-like through hole of wedge pressing mold, simultaneously the small-diameter circular cylinder of punch mandrel protrudes from outside the bottom surface of wedge pressing mold and is enough to form closed die cavity with corresponding die, by bolt, the wedge pressing mold is fixed on template subsequently; Subsequently pre-divergent die is enclosed within to the wedge pressing mold outer so that pre-divergent die and wedge pressing mold matched in clearance are fixed on pre-divergent die on template by bolt subsequently, finally to form hollow blank, shunt in advance-wedge is pressed the combined heave die structure.
While using this mould structure to prepare disc, concrete steps are:
The first step: after the precise extrusion mold integral assembled is heated to assigned temperature, respectively punch and die are fitted on shaping hydraulic machine, and on mould and hydraulic press workbench and slide block contact-making surface, the heat-insulation and heat-preservation backing plate are installed.
Second step: the circular material blank that will be heated to assigned temperature is put into concave die cavity, opens hydraulic press and carries out precise extrusion molding.
The 3rd step: removal hydraulic press load, after the backhaul of hydraulic press top shoe, drip molding is ejected from die, take out drip molding.
Compared with prior art, the present invention has following characteristics:
1) the hollow disc product that hollow blank is shaped, the allowance of minimizing centre bore, reduce plastic force, reduces manufacturing cost.
2) pre-divergent die is realized the predistribution of plastic deformation flow volume, reduces the forging surplus, improves stock utilization;
3) the wedge pressing mold is realized metal Plastic Flow under the wedge shape pressure-acting, increases the mobile flow process of plastic deformation, improves shaping product mechanical property;
4) the punch insert axial ratio forms closed die cavity prior to die, thereby retrains the further Radial Flow of metal, has reduced the contact area of punch and deformable metal, has reduced force in extrusion.
5) assembling die is simple in structure, is convenient to change, applied widely, practical.
The accompanying drawing explanation
Figure 1 shows that disk-shaped structure part top view.
Figure 2 shows that disk-shaped structure part A-A view.
Figure 3 shows that prior art forming process schematic diagram.
Figure 4 shows that pre-shunting-wedge pressure combined heave die structural representation.
In figure: the pre-divergent die 2-of 1-wedge pressing mold 3-punch mandrel 4-template
Figure 5 shows that the hollow blank top view.
Figure 6 shows that hollow blank B-B is to view.
Figure 7 shows that pre-divergent die top view.
Figure 8 shows that pre-divergent die C-C is to view.
Figure 9 shows that wedge pressing mold top view.
Figure 10 shows that wedge pressing mold D-D is to view.
Figure 11 shows that punch mandrel top view.
Figure 12 shows that punch mandrel E-E is to view.
Figure 13 shows that template center's cross section structure schematic diagram.
Figure 14 shows that convex mold of the present invention and hollow blank locations of structures schematic diagram.
Figure 15 shows that forming process figure of the present invention.
The specific embodiment
Embodiment 1:
The present embodiment is 480mm for the external diameter that is shaped, the LC4 aluminum alloy round diskware of structure shown in Fig. 1 that internal orifice dimension is 50mm.Mould comprises: pre-divergent die, wedge pressing mold, punch mandrel and template form the extruding punch, and die.
Concrete steps while using this mould:
The first step: the precise extrusion mold integral assembled is heated to 370 ℃ ± 5 ℃, is incubated after 4-5 hour, punch and die are fitted on shaping hydraulic machine, and on mould and hydraulic press workbench and slide block contact-making surface, the heat-insulation and heat-preservation backing plate is installed.
Second step: will be heated to 370 ℃ ± 5 ℃, the LC4 aluminium alloy annular blank (external diameter 425 ± 2mm, internal diameter 248 ± 2mm, high 75 ± 2mm) that is incubated 2-3 hour is joined and is put into die, opens hydraulic press and carries out precise extrusion molding.
The 3rd step: removal hydraulic press load, after the backhaul of hydraulic press top shoe, drip molding is gone out from the die middle term, take out drip molding.
Embodiment 2:
The present embodiment is 480mm for the external diameter that is shaped, the AZ80 magnesium alloy disc of structure shown in Fig. 1 that internal diameter is 50mm.Mould comprises: mould comprises: pre-divergent die, wedge pressing mold, punch mandrel and template form the extruding punch, and die.
The first step: the precise extrusion mold integral assembled is heated to 390 ℃ ± 5 ℃, is incubated after 4-5 hour, punch and die are fitted on shaping hydraulic machine, and on mould and hydraulic press workbench and slide block contact-making surface, the heat-insulation and heat-preservation backing plate is installed.
Second step: will be heated to 380 ℃ ± 5 ℃, the AZ80 magnesium alloy circular material blank that is incubated 2-3 hour (external diameter 425 ± 2mm, internal diameter 248 ± 2mm, high 75 ± 2mm) is joined and is put into die, opens hydraulic press and carries out precise extrusion molding.
The 3rd step: removal hydraulic press load, after the backhaul of hydraulic press top shoe, drip molding is ejected from die, take out drip molding.

Claims (6)

1. a pre-shunting-wedge is pressed precision forming mold, it mainly comprises that pre-shunting-wedge pressure precision forming mold mainly forms the extruding punch by pre-divergent die, wedge pressing mold, punch mandrel and template, and die, wherein template is cylinder or cuboid, it is characterized in that: the punch mandrel is comprised of two different cylinder one of diameter, and wherein the diameter of small-diameter circular cylinder is identical with the aperture of extrusion molding disk product; The wedge pressing mold is in the outside of punch mandrel, it is that an end face is plane, the other end hollow circular cylinder consistent with the surface configuration of extrusion molding disk product, the step-like through hole that its hollow space is total to central axis, coordinates with the punch insert shaft clearance with cylinder, and the diameter of the large diameter cylinder of the corresponding punch mandrel in the aperture of planar side, planar side also offer at least 4 with the fixing bolt hole of use of template; Pre-divergent die is in the outside of wedge pressing mold, it is also that an end face is plane, the other end hollow circular cylinder consistent with the surface configuration of extrusion molding disk product, its hollow space and cylinder altogether central axis, with the through hole of wedge pressing mold matched in clearance, planar side also offer at least 4 with the fixing bolt hole of use of template, the diameter of the through hole of described pre-divergent die is less than or equal to the internal diameter of hollow blank, and the external diameter of described pre-divergent die is slightly larger than the external diameter of extrusion molding disk product;
First the punch mandrel is passed so that punch mandrel and wedge pressing mold matched in clearance from the step-like through hole of wedge pressing mold, simultaneously the small-diameter circular cylinder of punch mandrel protrudes from outside the bottom surface of wedge pressing mold and is enough to form closed die cavity with corresponding die, by bolt, the wedge pressing mold is fixed on template subsequently; Subsequently pre-divergent die is enclosed within to the wedge pressing mold outer so that pre-divergent die and wedge pressing mold matched in clearance are fixed on pre-divergent die on template by bolt subsequently, finally to form hollow blank, shunt in advance-wedge is pressed the combined heave die structure.
2. a kind of pre-shunting according to claim 1-wedge is pressed precision forming mold, and it is characterized in that: described disk product external diameter is 450-500mm, and internal orifice dimension is 30-70mm.
3. a kind of pre-shunting one wedge according to claim 1 is pressed precision forming mold, and it is characterized in that: the external diameter of described hollow blank is 410-440mm, internal diameter 235-260mm, high 70-80mm.
4. one kind is utilized the described pre-shunting of claim 1-3-wedge to press precision forming mold to prepare the manufacturing process of disc, it is characterized in that:
The first step: after the precise extrusion mold integral assembled is heated to assigned temperature, respectively punch and die are fitted on shaping hydraulic machine, and on mould and hydraulic press workbench and slide block contact-making surface, the heat-insulation and heat-preservation backing plate are installed;
Second step: the circular material blank that will be heated to assigned temperature is put into concave die cavity, opens hydraulic press and carries out precise extrusion molding;
The 3rd step: removal hydraulic press load, after the backhaul of hydraulic press top shoe, drip molding is ejected from die, take out drip molding.
5. a kind of pre-shunting according to claim 4-wedge presses precision forming mold to prepare the manufacturing process of disc, it is characterized in that: in the first step, be heated to be incubated 4-5 hour after assigned temperature.
6. a kind of pre-shunting according to claim 4-wedge presses precision forming mold to prepare the manufacturing process of disc, it is characterized in that: in second, be heated to be incubated 2-3 hour after assigned temperature.
CN201310377254.0A 2013-08-27 2013-08-27 Pre-diverging-wedge pressing precision forming die and disc forming method CN103447340B (en)

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CN103447340B CN103447340B (en) 2015-07-22

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5668524A (en) * 1979-11-06 1981-06-09 Ryobi Ltd Production of spike mounting seat
KR20030018495A (en) * 2001-08-29 2003-03-06 방경철 Process for manufacturing an aluminum receiver tube integrated receiver head structure using the extrusion method.
CN202861029U (en) * 2012-10-19 2013-04-10 济宁骏达机械制造有限公司 Spoke nut seat hole bidirectional forming die
CN103191945A (en) * 2012-01-10 2013-07-10 江苏舒恒管夹制造有限公司 Method and device for high-pressure hydraulic flange plasticity forming
CN103230952A (en) * 2013-05-13 2013-08-07 无锡市神力齿轮冷挤有限公司 Cold extrusion device of taper ratchets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5668524A (en) * 1979-11-06 1981-06-09 Ryobi Ltd Production of spike mounting seat
KR20030018495A (en) * 2001-08-29 2003-03-06 방경철 Process for manufacturing an aluminum receiver tube integrated receiver head structure using the extrusion method.
CN103191945A (en) * 2012-01-10 2013-07-10 江苏舒恒管夹制造有限公司 Method and device for high-pressure hydraulic flange plasticity forming
CN202861029U (en) * 2012-10-19 2013-04-10 济宁骏达机械制造有限公司 Spoke nut seat hole bidirectional forming die
CN103230952A (en) * 2013-05-13 2013-08-07 无锡市神力齿轮冷挤有限公司 Cold extrusion device of taper ratchets

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