CN201217051Y - 7A04 aluminum alloy cartridge receiver body type part coredforging mould - Google Patents
7A04 aluminum alloy cartridge receiver body type part coredforging mould Download PDFInfo
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- CN201217051Y CN201217051Y CNU2008200671148U CN200820067114U CN201217051Y CN 201217051 Y CN201217051 Y CN 201217051Y CN U2008200671148 U CNU2008200671148 U CN U2008200671148U CN 200820067114 U CN200820067114 U CN 200820067114U CN 201217051 Y CN201217051 Y CN 201217051Y
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Abstract
Disclosed is a multiple-ram forging die for 7A04 aluminium alloy casing accessories, belonging to metal material plastic molding dies and aiming at effectively solving the problems on multiple-ram forging dies used in open die forging technique and constant-temperature die forging technique. The multiple-ram forging die comprises an upper half female die and a lower half female die which are symmetrical, a pre-forging male die, a finish-forging male die, a pre-forging male die fixing plate, a finish-forging male die fixing plate, and a die carrier comprising an upper die holder and a lower die holder. The upper half female die and the lower half female die are horizontally symmetrical sub-die structures and are provided with convex sections. The pre-forging male die and the finish-forging male die are provided with convex sections and are arranged at the left side and the right side of the lengthwise symmetry line of the forging die. The multiple-ram forging die has the advantages of simple structure and reliable performance and is convenient to make, install and use. The multiple-ram forging die can greatly reduce frictional resistance between the forged piece and the cavity of the forging die, improve the surface quality of the forged piece and remarkably improve the service life of the forging die.
Description
Technical field
The utility model belongs to metal material Plastic Forming mould, particularly is used to produce the multi-ram forging mould of firearms 7A04 aluminum alloy casing body class part.
Background technology
7A04 aluminium alloy specific strength and specific stiffness height, but plasticity is poor, and the plastic deformation flow resistance is big, and speed sensitivity is strong.At present, domestic military project system is for 7A04 aluminum alloy casing body class part, and traditional method is to adopt open die forging, impressing forging explained hereafter on the die hammer, and its technological process is blanking → heating → base → blocking → heating → finish-forging → side cut.The subject matter that its technology exists is, the overlap metal loss is big, and machining allowance and forging tolerance are big, and stock utilization only is 41.4%, because of hammer die forging speed height (5000～6000mm/s), often cause the forging face crack by force because of speed sensitivity.Liu Chuanlin, Cao Yang, yellow U.S. equality " casing ausforming technology numerical simulation " (manufacturing technology and practice, 2004 (4), 35～38) adopt DEFORM3D software that casing ausforming technology has been carried out numerical simulation, analog result shows can adopt isothermal forging process LC4 (7A04) the aluminum alloy casing forging that is shaped, maximum plastic force is 4700KN, suppose during die forging that it is 6mm/s that patrix is depressed speed, rather than actual isothermal die forging process forming speed.Xu strong determined person " 7A04 aluminum alloy casing technical study and application " (manufacturing technology and practice, 2005 (5), 31～34) research and the applicable cases of 7A04 aluminum alloy casing ausforming technology have been narrated, the aluminum alloy forged temperature of 7A04 is 420 ℃, adopt the vertical mould dissection type mould structure of inserting that divides, the mold heated temperature is 400 ℃, die-forging forming on the 5000KN hydraulic press; The heavy 1.45Kg of the common forgings that adopts traditional handicraft to produce also has been described, materials 2.415Kg, and the heavy 1.00Kg of ausforming forging, materials 1.65～1.75Kg, its stock utilization is 58.8%.But the actual forming speed of the undeclared ausforming of this article.Liu Runguang, Liu Fang, the pure will in road etc., at " the anti-arm lower contact isothermal volume Research on forming of turning round of 7075 aluminium alloys " (forging technology, 1999,24 (5): 6～9) to be used for the deformation velocity of the forcing press of isothermal forging be 0.05～0.5mm/s to the isothermal die forging process forming technology of Ti Chuing, and production efficiency is extremely low.Existing isothermal die forging process forming technology is die-forging forming when remaining on constant high temperature (t=420 ℃) with mould and blank (through the blank of base), but its advantage is an once-forming goes out complex-shaped forging, required die forging power is little, the forging stock utilization greatly improves than common die forging, but because of the deformation velocity of the forcing press that is used for isothermal forging is that 0.05～0.5mm/s production efficiency is extremely low, and mould is in the condition of high temperature (400 ℃) always and causes service life low.
Up to now, remove " the casing body multi-ram forging Thermal-mechanical Coupling numerical simulation " that people such as huge Zan of summer, Hu Guoan deliver (forging technology, 2007,32 (3): 12～15) relate to outside the utility model technology, not seeing has constructed research and application report both at home and abroad; " casing body multi-ram forging Thermal-mechanical Coupling numerical simulation " die-forging forming of process using only is suitable for that machining shape is simple, the uniform casing body class part of distortion.
Summary of the invention
The utility model provides a kind of 7A04 aluminum alloy casing body class part multi-ram forging mould, and purpose is effectively to overcome the problem that the multi-ram forging mould exists in existing open die forging, impressing forging technology and the isothermal forging process.
A kind of 7A04 aluminum alloy casing body class part multi-ram forging mould of the present utility model, upper and lower half die that comprises symmetry, blocking punch, finish-forging punch, blocking punch retainer, finish-forging punch retainer and mould bases, mould bases is made up of upper and lower die holder, be respectively applied for and fix first die and second die, it is characterized in that:
First die and second die have convex shape section, for horizontal symmetrical is divided mode structure; Described blocking punch and finish-forging punch have convex shape section, are positioned at the right and left of the vertical line of symmetry of mould; The corresponding blocking punch of upper and lower half die position is not used in the type groove of shaping forging both sides boss, and the corresponding finish-forging punch of upper and lower half die position has the type groove of the forging both sides boss that is used to be shaped; The blocking punch is corresponding to the few 8～9mm of punch height of the punch aspect ratio finish-forging punch of forging stub end, the many 2～3mm of the punch height of other position punch aspect ratio finish-forging punch of blocking punch; The casing body finish-forging hot forging shape and the size of the shape of the finish impression that finish-forging punch and upper and lower half die are constituted and size and design in advance are identical.
Described multi-ram forging mould is characterized in that:
Corresponding blocking punch of described first die and finish-forging punch rear and front end are equipped with 3 °～5 ° withdrawing pattern inclined-plane, and corresponding pre-forging of second die and die shoe and finish-forging spare size two ends are provided with and eject the hole;
Described first die and second die are provided with pilot pin and correcting hole;
Between first die and the upper bolster, be provided with location load key between second die and the die shoe.
When the utility model was used for 7A04 aluminum alloy casing body class part multi-ram forging technology, order comprised blanking, heating, base, heating, multi-ram forging step again, and described multi-ram forging step process is:
(1) with the multi-ram forging mould the multidirectional blocking of the 7A04 aluminium alloy roll forging blank of heating is shaped, blank is put into the blocker of multi-ram forging mould, the blank temperature is 430 ℃～450 ℃, and the temperature of upper and lower half die of described mould is 200 ℃～220 ℃; With respect to the finish-forging spare that designs in advance, the pre-forging inner groovy of gained groove depth does not put in place at stub end, forging both sides boss unshaped;
(2) forging part that with the multi-ram forging mould blocking is shaped again realizes that multidirectional finish-forging is shaped, with 180 ° of finish impression of putting into the multi-ram forging mould of pre-forging upset, pre-forging temperature 〉=350 ℃, the temperature of upper and lower half die of mould is 200 ℃～220 ℃, obtains the casing body forging part of non-trimming.
The utility model can effectively overcome the problem that existing two kinds of contour forging techniques exist.Die is designed to first die and second die horizontal symmetrical is divided mode structure, blocker and finish impression are distributed in the both sides of the vertical line of symmetry of upper and lower two halves die module, when multidirectional blocking and multidirectional finish-forging, forging all is in strong three-dimensional compressive stress state, the utility model is compared with open die forging, impressing forging on the die hammer, its difference and advantage are: the utility model blocking and finish-forging are once finished after the heating, and the operation of need not cutting edge; Forging is the multi-ram forging mode and is shaped when blocking and finish-forging, deformable metal is in strong three-dimensional compressive stress state, thereby its Plastic Forming performance greatly improves, add die forging on the multi-ram forging hydraulic press, its forming speed is 30mm/s, (5000～6000mm/s) is much lower, do not exist speed too high and phenomenon that speed sensitivity that occur causes the surface to crack by force takes place to go up die-forging forming speed 5～6m/s than hammer; Forging non-trimming metal loss, and surplus and tolerance are little, and forge weight is 0.98Kg, materials 1.15～1.20Kg, forging stock utilization average out to 85% improves more than 50% than open die forging, impressing forging.
The utility model is compared with isothermal die forging process, and its difference and advantage are: isothermal die forging process is under all constant high temperature (t=420 ℃) of blank and mould, and punch is shaped with the down direct finish-forging of speed (0.3mm/s) very slowly.The utility model be blank at short time high temperature (t=430 ℃～450 ℃) and mould is shaped with finish-forging behind the speed elder generation blocking of 30mm/s when being generally 200 ℃～220 ℃, thereby its forming speed significantly improves, and then production efficiency also significantly improves; Die life height; The forging stock utilization improves 26%, and the tensile strength sigma of forging
bHigher.
The utility model mould structure is simple, manufacturing, easy to install and use, reliable operation; Technological process is reasonable, technological parameter and stable performance; The roll forging blank is heated to 430 ℃～450 ℃, by with the backward extrusion being the multidirectional blocking shaping of deformation behaviour, be shaped by the multidirectional finish-forging that is deformed into feature with upsetting squeeze then, the two procedures forging all is under the strong triaxial pressure state and is shaped, and has significantly improved the Plastic Forming performance of 7A04 aluminium alloy; Finish-forging is to be shaped at a lower temperature, helps improving forging inside metallographic and mechanical property, and makes the surface brighter and cleaner; Mould is designed to multidirectional minute mode structure realizes that multi-ram forging is shaped, can significantly reduce die-forging forming and forging and eject that forging further improves forging surface quality with the contact friction resistance on impression surface in the process, and significantly improve die life.
Description of drawings
Fig. 1 model casing body roll forging blank schematic diagram;
Fig. 2 model casing body forging finished product schematic three dimensional views;
Fig. 3 the utility model multi-ram forging mould schematic diagram;
First die upward view of Fig. 4 the utility model;
First die left view of Fig. 5 the utility model;
Fig. 6 the utility model blocking punch upward view;
Fig. 7 the utility model finish-forging punch upward view.
The specific embodiment
Fig. 1 is certain model casing body roll forging blank schematic diagram.
Fig. 2 is certain model casing body forging finished product schematic three dimensional views, finish-forging spare stub end 19 among the figure, and finish-forging spare microcephaly holds 20.
As Fig. 3～shown in Figure 7, the utility model multi-ram forging mould comprises first die 3, second die 11 of symmetry, blocking punch 6, finish-forging punch 15, blocking punch retainer 4, finish-forging punch retainer 14 and mould bases, mould bases is made up of upper bolster 2, die shoe 9, be respectively applied for and fix first die 3 and second die 11
First die 3 has convex shape section with second die 11, for horizontal symmetrical is divided mode structure; Described blocking punch 6 has convex shape section with finish-forging punch 15, is positioned at the right and left of the vertical line of symmetry of mould; The corresponding blocking punch of upper and lower half die position is not used in the type groove of shaping forging both sides boss, and the corresponding finish-forging punch of upper and lower half die position has the type groove of the forging both sides boss that is used to be shaped; The blocking punch is corresponding to the few 8～9mm of punch height of the punch aspect ratio finish-forging punch of forging stub end, the many 2～3mm of the punch height of other position punch aspect ratio finish-forging punch of blocking punch; Upper and lower half die and blocking punch constitute blocker 7, and the casing body finish-forging hot forging shape and the size of the shape of the finish impression 12 that finish-forging punch 15 and upper and lower half die are constituted and size and design in advance are identical.
Described first die 3 corresponding blocking punch 6 and finish-forging punch 15 rear and front ends are equipped with 3～5 ° withdrawing pattern inclined-plane 21, and second die 11 and die shoe 9 corresponding pre-forging and finish-forging spare size two ends are provided with and eject the hole;
Described first die and second die are provided with pilot pin 16 and correcting hole 18;
Between first die and the upper bolster, be provided with location load key 17 between second die and the die shoe.
During work, multi-ram forging mould of the present utility model is fixed on the forcing press, and upper bolster 2 is connected with master slider 1, and die shoe 9 is connected with workbench 8, and blocking punch retainer 4 is connected with left slider 5, and finish-forging punch retainer 14 is connected with right slide block 13; Workbench 8 is provided with and ejects the hole, is used to insert backing-out punch 10.
Embodiment 1
The multi-ram forging process of certain model casing body forging is: the first step: the 7A04 aluminium alloy roll forging blank (as shown in Figure 1) that will be heated to 450 ℃, put into the blocker 7 on second die 11 left sides, upper bolster 2 and first die 3 with forcing press master slider 1 go downwards to blank flattened and close up with second die 11 till, then blocking punch 6 moves right to stretch into left slider 5 and makes blank produce the backward extrusion distortion in the blocker 7, when the last lower shoulder of blocking punch 6 with till last second die module left side contacts, on, the temperature of second die is 200 ℃, blocking plastic force 3000KN, blocking punch 6 is moved to the left to withdraw from from pre-forging and blocker 7 with left slider 5 gets back to original position, first die 3 is with the 1 upwards backhaul of forcing press master slider, and backing-out punch 10 ejects pre-forging from the blocker 7 of second die; Second goes on foot: the 180 ° of finish impression 12 of putting into second die 11 the right of pre-forging upset that with temperature are 370 ℃, first die 3 with forcing press master slider 1 come downwards to close up with second die 11 till, then finish-forging punch 15 with right slide block 13 be moved to the left stretch into make in the finish impression 12 pre-forging enclosed state upsetting extrusion to the punch shoulder with on till second die right side contacts, on, the temperature of second die is 200 ℃, finish-forging plastic force 6000KN, finish-forging punch 15 moves right with right slide block and withdraws to the home position from forging and finish impression 12, first die 3 is with master slider 1 backhaul, backing-out punch 10 ejects forging from second die finish impression 12, and the gained forging as shown in Figure 2.The first step blocking and the second step finish-forging are automatic operating process.Pilot pin 16 and correcting hole 18 are used for upper and lower half die the matched moulds location are installed; Location load key 17 is respectively applied for and bears side direction die forging power when upper and lower half die is installed location and blocking and finish-forging with main frame slide block and workbench.
Embodiment 2
The first step: will be heated to 430 ℃ 7A04 aluminium alloy blank and put into 220 ℃ mould blocking and be shaped; Second step: temperature is reduced to 350 ℃ the pre-forging of aluminium alloy put into 220 ℃ mould finish-forging and be shaped.All the other details are identical with embodiment 1.
Claims (2)
1. 7A04 aluminum alloy casing body class part multi-ram forging mould, upper and lower half die that comprises symmetry, blocking punch, finish-forging punch, blocking punch retainer, finish-forging punch retainer and mould bases, mould bases is made up of upper and lower die holder, be respectively applied for and fix first die and second die, it is characterized in that:
First die and second die have convex shape section, for horizontal symmetrical is divided mode structure; Described blocking punch and finish-forging punch have convex shape section, are positioned at the right and left of the vertical line of symmetry of mould; The corresponding blocking punch of upper and lower half die position is not used in the type groove of shaping forging both sides boss, and the corresponding finish-forging punch of upper and lower half die position has the type groove of the forging both sides boss that is used to be shaped; The blocking punch is corresponding to the few 8～9mm of punch height of the punch aspect ratio finish-forging punch of forging stub end, the many 2～3mm of the punch height of other position punch aspect ratio finish-forging punch of blocking punch; The casing body finish-forging hot forging shape and the size of the shape of the finish impression that finish-forging punch and upper and lower half die are constituted and size and design in advance are identical.
2. multi-ram forging mould as claimed in claim 1 is characterized in that:
Corresponding blocking punch of described first die and finish-forging punch rear and front end are equipped with 3 °～5 ° withdrawing pattern inclined-plane, and corresponding pre-forging of second die and die shoe and finish-forging spare size two ends are provided with and eject the hole;
Described first die and second die are provided with pilot pin and correcting hole;
Between first die and the upper bolster, be provided with location load key between second die and the die shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200671148U CN201217051Y (en) | 2008-05-12 | 2008-05-12 | 7A04 aluminum alloy cartridge receiver body type part coredforging mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200671148U CN201217051Y (en) | 2008-05-12 | 2008-05-12 | 7A04 aluminum alloy cartridge receiver body type part coredforging mould |
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| Publication Number | Publication Date |
|---|---|
| CN201217051Y true CN201217051Y (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200671148U Expired - Lifetime CN201217051Y (en) | 2008-05-12 | 2008-05-12 | 7A04 aluminum alloy cartridge receiver body type part coredforging mould |
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| CN (1) | CN201217051Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214526B (en) * | 2008-01-04 | 2010-06-02 | 华中科技大学 | 7A04 aluminum alloy casing body parts multi-functional die forging technique and mold |
| CN103230999A (en) * | 2013-01-18 | 2013-08-07 | 洛阳秦汉冷锻有限公司 | Final-forming forging mold of fan-shaped forging |
| CN109940122A (en) * | 2019-03-26 | 2019-06-28 | 吉林大学 | The split type axle box near-net-shape method of standard EMU |
| CN110497154A (en) * | 2019-08-29 | 2019-11-26 | 浙江同兴金属锻件股份有限公司 | The processing method of braking automobile cushion block |
| CN113510214A (en) * | 2021-05-14 | 2021-10-19 | 江苏隆盛钻采机械制造有限公司 | Forming die of pin head forging and manufacturing method thereof |
| CN114472575A (en) * | 2021-12-22 | 2022-05-13 | 北京航星机器制造有限公司 | Multidirectional hot extrusion forming die and forming method for light saddle-shaped end frame structure |
-
2008
- 2008-05-12 CN CNU2008200671148U patent/CN201217051Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214526B (en) * | 2008-01-04 | 2010-06-02 | 华中科技大学 | 7A04 aluminum alloy casing body parts multi-functional die forging technique and mold |
| CN103230999A (en) * | 2013-01-18 | 2013-08-07 | 洛阳秦汉冷锻有限公司 | Final-forming forging mold of fan-shaped forging |
| CN109940122A (en) * | 2019-03-26 | 2019-06-28 | 吉林大学 | The split type axle box near-net-shape method of standard EMU |
| CN110497154A (en) * | 2019-08-29 | 2019-11-26 | 浙江同兴金属锻件股份有限公司 | The processing method of braking automobile cushion block |
| CN110497154B (en) * | 2019-08-29 | 2020-10-27 | 浙江同兴金属锻件股份有限公司 | Method for processing automobile brake pad block |
| CN113510214A (en) * | 2021-05-14 | 2021-10-19 | 江苏隆盛钻采机械制造有限公司 | Forming die of pin head forging and manufacturing method thereof |
| CN114472575A (en) * | 2021-12-22 | 2022-05-13 | 北京航星机器制造有限公司 | Multidirectional hot extrusion forming die and forming method for light saddle-shaped end frame structure |
| CN114472575B (en) * | 2021-12-22 | 2024-04-05 | 北京航星机器制造有限公司 | Multidirectional hot extrusion forming die and forming method for light saddle-shaped end frame structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090408 Effective date of abandoning: 20080512 |