CN105397010A - Isothermal die forging forming die and method for rare earth magnesium alloy thin webbed supporting fork - Google Patents

Isothermal die forging forming die and method for rare earth magnesium alloy thin webbed supporting fork Download PDF

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Publication number
CN105397010A
CN105397010A CN201510945591.4A CN201510945591A CN105397010A CN 105397010 A CN105397010 A CN 105397010A CN 201510945591 A CN201510945591 A CN 201510945591A CN 105397010 A CN105397010 A CN 105397010A
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forging
blank
rare earth
magnesium
heated
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CN201510945591.4A
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CN105397010B (en
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袁林
徐福昌
单德彬
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/74Making machine elements forked members or members with two or more limbs, e.g. U-bolts, anchors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K29/00Arrangements for heating or cooling during processing

Abstract

The invention relates to a forming die and method for magnesium alloy thin webbed supporting fork forgings, in particular to an isothermal die forging forming die and method for a rare earth magnesium alloy thin webbed supporting fork. The problems that rare earth magnesium alloy thin webbed supporting fork forgings are prepared through conventional forging, blank manufacturing and forming are hard, forming defects are prone to occurring, the structure performance of the magnesium alloy forgings is hard to control, and the performance is low are solved. The forming method comprises the main steps that 1, blank manufacturing is carried out; 2, forging forming is carried out; 3, cooling is carried out; 4, primary acid pickling is carried out; 5, damage repairing is carried out; 6, final forging is carried out; 7, secondary acid pickling is carried out, wherein a magnesium alloy forging obtained in the sixth step is subjected to acid pickling, graphite on the surface is cleaned away, and a formed forging with the treated surface is obtained; and 8, the formed forging with the treated surface obtained in the seventh step is put into an aging oven to be subjected to aging treatment, and the finished rare earth magnesium alloy thin webbed supporting fork is manufactured. The forming die and method are used for preparing of the magnesium alloy thin webbed supporting fork.

Description

The thin abdomen of a kind of magnesium-rare earth props up fork isothermal die forging process shaping dies and method
Technical field
The present invention relates to a kind of magnesium alloy thin-web and prop up fork forging forming mould and method, be specifically related to the thin abdomen of a kind of magnesium-rare earth and prop up fork forging isothermal die forging process shaping dies and method.
Background technology
Magnesium alloy is metal material the lightest in current engineer applied material, has higher specific strength and specific stiffness.Along with the development in the fields such as Aero-Space, automobile, electronics, it is more and more higher to material lightweight, high performance requirement.For the Aero-Space class A of geometric unitA requiring loss of weight, be mostly designed to have a structure for web and a fork, if this component adopts conventional method as method manufactures such as casting, machinings, be difficult to meet high-performance, environmental protection, the requirement such as energy-conservation, efficient.And adopt the method for this precision plastic forming of ausforming technique to be a kind of method of effective this class A of geometric unitA of production.
Magnesium alloy thin-web props up fork forgings and is generally difficult to once-forming, very easily occur fold defect, and multi-step forming technique repeatedly heats and easily causes magnesium alloy crystal grain sharply to be grown up, and causes mechanical properties decrease, is difficult to meet instructions for use.
Summary of the invention
The present invention prepares the thin abdomen of magnesium-rare earth for the conventional forging of solution and props up fork forgings, there is base and forming difficulty, easily there is forming defects, the structure property of magnesium alloy forging is difficult to the problem controlled and performance is on the low side, and then provides the thin abdomen of a kind of magnesium-rare earth to prop up fork class isothermal die forging process shaping dies and method.
The present invention solves the problems of the technologies described above the technical scheme taked to be:
The thin abdomen of a kind of magnesium-rare earth of the present invention props up fork isothermal die forging process shaping dies and comprises patrix, push rod and counterdie, and the middle part of the upper surface of counterdie is processed with die cavity from top to bottom successively and ejects hole, die cavity and to eject hole through;
Die plate insert is furnished with in die cavity, die plate insert is staged die plate insert, the small end of die plate insert is placed in and ejects in hole, the middle part of the lower surface of patrix is processed with the drift matched with die cavity, the shape of the large end of drift and die plate insert and thin abdomen to be formed prop up fork and are equipped with, drift stretches in die cavity, push rod stretches into and ejects in hole, and the upper surface of push rod leans on the lower surface of the small end of die plate insert, upper die and lower die are separately installed with Electrothermal ring, upper die and lower die are provided with through guide pillar hole, upper mould cover is combined on counterdie.
It is realize according to following steps that the thin abdomen of a kind of magnesium-rare earth of the present invention props up fork isothermal die forging process manufacturing process:
One, base: be diameter by magnesium-rare earth raw material be 155mm, length is that the extruded bars of 160mm carries out jumping-up pulling process combining and is shaped, and obtains the magnesium alloy metal plate blank that open die forging causes band arc;
Two, forging and molding: magnesium-rare earth blank obtained for step one is put into box heating resistor stove and heats, takes out when being heated to 160-180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 400-440 DEG C and be incubated 2-2.5 hour, finally by mold heated to 380-410 DEG C, the blank heated is placed in the die cavity of counterdie, apply the pressure of 1300 tons ~ 1600 tons to patrix under the effect of forcing press, patrix downstream rate is 0.8-1.2mm/s, forging temperature is 415-425 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, and wherein, the mass percentage concentration of the aquadag aqueous solution is 15% ~ 20%;
Three, cool: the magnesium-rare earth forging semi-finished product knock-pin that step 2 is obtained takes out, air cooling;
Four, a pickling: the forging semi-finished product obtained through step 3 are carried out pickling, has cleared up surface;
Five, wound is repaiied: carried out repairing wound by the forging semi-finished product obtained through step 4, clean out folded part;
Six, finish-forging: the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heats, takes out when being heated to 160-180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 370-400 DEG C and be incubated 2-2.5 hour, finally by mold heated to 350-370 DEG C, the blank heated is placed in the die cavity of counterdie, apply the pressure of 1300 tons ~ 1600 tons to patrix under the effect of forcing press, patrix downstream rate is 0.8-1.2mm/s, forging temperature is 385-395 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, and wherein, the mass percentage concentration of the aquadag aqueous solution is 15% ~ 20%;
Seven, white picking: the magnesium alloy forging obtained through step 6 is carried out pickling, washes the graphite on surface, obtains surface-treated and become shape Forging;
Eight, become by the surface-treated that step 7 obtains shape Forging to put into aging furnace and carry out Ageing Treatment, the time is 60 hours, and temperature is 200 DEG C, and the obtained thin abdomen of magnesium-rare earth props up fork finished product.
The invention has the beneficial effects as follows:
One, the present invention is configured as the thin abdomen of technological means shaping magnesium-rare earth with isothermal die forging process and props up fork forgings, only use a set of building mortion of the present invention just can realize low cost, small-sized mass, quality are high, the die forging part of high life is produced, for the interior tissue of forging and premium properties provide important leverage.
Two, the present invention adopts die forging forming process method, such that forging ' s block dimension precision formed thereby is high, interior tissue performance is good, and die adopts block insert type structure, avoids thin abdomen and props up the difficulty that fork forgings is difficult to the demoulding.
Three, the present invention carries out the careful design etc. of technique, scheme and preform by computer finite element numerical simulation, avoids thin abdomen and to prop up in fork forgings forming process being not fully filled and fold defect etc. of comparatively easily occurring.While carrying out isothermal die forging process shaping, by means of numerical simulation and experiment to this forging forming rule and Defects Forming Mechanism and control method, meanwhile, Design of digital and manufacturing technology is adopted effectively to improve the quality of the design of such mould for forging, forming arrangements optimization and forming technology.
Four, the present invention obtains by open die forging base the blank that a kind of thin abdomen props up fork class magnesium-rare earth forging, solves current thin abdomen and props up the difficult problem of pitching class magnesium-rare earth blank and not easily obtaining.
Five, the present invention is controlled by the temperature reducing about 30 DEG C between every time forging, avoids magnesium alloy thin-web and props up fork forgings crystal grain and sharply grow up, degradation under mechanical performance.When the present invention is by increasing for passage number time magnesium alloy forged, ladder reduces forging temperature, realizes the object ensureing Magnesium Alloy and performance.
Six, the present invention is by research artificial aging technique, and make the final forging fracture strength be shaped reach 465-475MPa, yield strength reaches 375-385MPa.Isothermy die forging method of the present invention effectively can improve magnesium-rare earth and prop up fork forgings intensity, plasticity and toughness, test specimen after die forging is after artificial aging process, the tensile strength peak that obtained magnesium alloy thin-web props up fork forging reaches 475Mpa, yield strength is 385Mpa, and mechanical performance obviously increases.Forging surface microstructure fine uniform, without coarse-grain mixed crystal, dense internal organization, streamline distribution is reasonable.Through ultrasound examination, have no in forging inside be mingled with, bubble, the defect such as shrinkage cavity, reach related request.
Seven, production efficiency of the present invention is high, and during die forging, the distortion of metal is carried out in die cavity, can obtain required form, saves metal material, reduces machining workload, under the condition that batch is enough, reduces costs; The present invention is simple to operate, and labour intensity is lower.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of shaping dies of the present invention, Fig. 2 is the side view of Fig. 1, Fig. 3 is the main TV structure schematic diagram of patrix, Fig. 4 be patrix look up structural representation, Fig. 5 is the side view of Fig. 4, Fig. 6 is the main TV structure schematic diagram of counterdie, Fig. 7 is the side view of Fig. 6, Fig. 8 is the A-A direction view of Fig. 6, Fig. 9 is the structural representation of push rod, Figure 10 is the structural representation of the blank that step one obtains, Figure 11 is the structural representation of the semi-finished product forging that step 4 obtains, Figure 12 is that the thin abdomen of surface-treated magnesium-rare earth that step 7 obtains props up fork forging schematic diagram, Figure 13 is that the thin abdomen of magnesium-rare earth that step 8 process obtains props up the signal of fork finished product, Figure 14 is the prefabricated blank schematic diagram propping up fork forging for the preparation of the thin abdomen of the present invention adopting finite element numerical simulation to obtain.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1-Fig. 2 explanation, the thin abdomen of a kind of magnesium-rare earth of present embodiment props up fork isothermal die forging process shaping dies and comprises patrix 1, push rod 3 and counterdie 2, the middle part of the upper surface of counterdie 2 is processed with die cavity 2-1 from top to bottom successively and ejects hole 2-2, die cavity 2-1 and to eject hole 2-2 through;
Die plate insert 5 is furnished with in die cavity 2-1, die plate insert 5 is staged die plate insert, the small end of die plate insert 5 is placed in and ejects in the 2-2 of hole, the middle part of the lower surface of patrix 1 is processed with the drift 1-1 matched with die cavity 2-1, the shape of the large end of drift 1-1 and die plate insert 5 and thin abdomen to be formed prop up fork and are equipped with, drift 1-1 stretches in die cavity 2-1, push rod 3 stretches into and ejects in the 2-2 of hole, and the upper surface of push rod 3 leans on the lower surface of the small end of die plate insert 5, patrix 1 and counterdie 2 are separately installed with Electrothermal ring 4, patrix 1 and counterdie 2 are provided with through guide pillar hole 1-3, patrix 1 covers on counterdie 2.
Present embodiment obtains forging drawing according to part shape G-Design, die drawing is devised according to forging drawing, mould is in order to be convenient in demoulding, by concave die cavity bottom design block insert type die plate insert 5, for forging demoulding, adopt finite element to carry out the numerical simulation of technical process, devise two kinds of prefabricated blank shapes, carry out finite element numerical simulation, shown to adopt Figure 14 prefabricated blank not easily to produce collapsed shape.According to this preform, have employed the extruded bars of Φ 155mm × 160mm.The magnesium-rare earth of present embodiment refers to Mg-13Gd-6Y-0.6Zr magnesium alloy.
Detailed description of the invention two: composition graphs 9 illustrates, the push rod 3 of present embodiment is from top to bottom successively by coaxially to arrange and on all-in-one-piece processed, cylinder 3-1 and lower cylinder 3-2 is formed, the upper end of lower cylinder 3-2 and the lower surface of upper cylinder 3-1 affixed, upper cylinder 3-1 is inserted into and ejects in the 2-2 of hole, and the upper surface of upper cylinder 3-1 leans on die plate insert 5.Setting like this, easy to use and reliable.Other is identical with detailed description of the invention one.
Detailed description of the invention three: composition graphs 1-Figure 14 explanation, present embodiment utilize a kind of isothermal die forging process shaping dies of detailed description of the invention one or two to realize a kind of isothermal die forging process shaping dies to realize the thin abdomen of magnesium-rare earth and prop up fork isothermal die forging process manufacturing process, it is realize according to following steps that the thin abdomen of this magnesium-rare earth props up fork isothermal die forging process manufacturing process:
One, base: be diameter by magnesium-rare earth raw material be 155mm, length is that the extruded bars of 160mm carries out jumping-up pulling process combining and is shaped, and obtains the magnesium alloy metal plate blank that open die forging causes band arc;
Two, forging and molding: magnesium-rare earth blank obtained for step one is put into box heating resistor stove and heats, takes out when being heated to 160-180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 400-440 DEG C and be incubated 2-2.5 hour, finally by mold heated to 380-410 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1300 tons ~ 1600 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 0.8-1.2mm/s, forging temperature is 415-425 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, and wherein, the mass percentage concentration of the aquadag aqueous solution is 15% ~ 20%;
Three, cool: the magnesium-rare earth forging semi-finished product knock-pin that step 2 is obtained takes out, air cooling;
Four, a pickling: the forging semi-finished product obtained through step 3 are carried out pickling, has cleared up surface;
Five, wound is repaiied: carried out repairing wound by the forging semi-finished product obtained through step 4, clean out folded part;
Six, finish-forging: the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heats, takes out when being heated to 160-180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 370-400 DEG C and be incubated 2-2.5 hour, finally by mold heated to 350-370 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1300 tons ~ 1600 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 0.8-1.2mm/s, forging temperature is 385-395 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, and wherein, the mass percentage concentration of the aquadag aqueous solution is 15% ~ 20%;
Seven, white picking: the magnesium alloy forging obtained through step 6 is carried out pickling, washes the graphite on surface, obtains surface-treated and become shape Forging;
Eight, become by the surface-treated that step 7 obtains shape Forging to put into aging furnace and carry out Ageing Treatment, the time is 60 hours, and temperature is 200 DEG C, and the obtained thin abdomen of magnesium-rare earth props up fork finished product.
Present embodiment obtains forging drawing according to part shape G-Design, die drawing is devised according to forging drawing, mould is in order to be convenient in demoulding, by concave die cavity bottom design block insert type die plate insert 5, for forging demoulding, adopt finite element to carry out the numerical simulation of technical process, devise two kinds of prefabricated blank shapes, carry out finite element numerical simulation, shown to adopt Figure 14 prefabricated blank not easily to produce collapsed shape.According to this preform, have employed diameter is 155mm, and length is the extruded bars of 160mm.The magnesium-rare earth of present embodiment refers to Mg-13Gd-6Y-0.6Zr magnesium alloy.
The structural representation of the blank that the step one of present embodiment obtains as shown in Figure 10; As shown in figure 11, the blank smooth in appearance obtained is smooth for the structural representation of the semi-finished product forging that step 4 obtains, and pre-forging and thin abdomen prop up fork and match; The thin abdomen of surface-treated magnesium-rare earth that step 7 obtains props up fork forging schematic diagram as shown in figure 12, and the forging smooth in appearance obtained is smooth, and surface treatment becomes shape Forging and thin abdomen to prop up fork to match; The thin abdomen of the magnesium-rare earth that step 8 process obtains props up fork finished product schematic diagram as shown in figure 13.As shown in Figure 13, the forging smooth in appearance obtained is smooth, becomes shape Forging and thin abdomen to prop up fork and matches.Batch product forging can be carried out according to this technique.
Detailed description of the invention four: present embodiment and detailed description of the invention three difference are: in step 2, the magnesium-rare earth blank that step one is obtained is put into box heating resistor stove and heat, take out when being heated to 170 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 420 DEG C and be incubated 2.5 hours, finally by mold heated to 400 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1400 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.0mm/s, and forging temperature is 420 DEG C.Other step and parameter identical with detailed description of the invention three.
Detailed description of the invention five: one of present embodiment and detailed description of the invention three to four difference is: in step 2, the magnesium-rare earth blank that step one is obtained is put into box heating resistor stove and heat, take out when being heated to 180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 440 DEG C and be incubated 2 hours, finally by mold heated to 380 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1300 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.2mm/s, and forging temperature is 415 DEG C.Other step and parameter identical with one of detailed description of the invention three to four.
Detailed description of the invention six: one of present embodiment and detailed description of the invention three to five difference is: in step 6, the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heat, take out when being heated to 170 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 385 DEG C and be incubated 2.2 hours, finally by mold heated to 360 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1400 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.0mm/s, and forging temperature is 390 DEG C.Other step and parameter identical with one of detailed description of the invention three to five.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention three to six difference is: in step 6, the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heat, take out when being heated to 180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 400 DEG C and be incubated 2 hours, finally by mold heated to 350 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1600 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.2mm/s, and forging temperature is 385 DEG C.Other step and parameter identical with one of detailed description of the invention three to six.
Detailed description of the invention eight: one of present embodiment and detailed description of the invention three to seven difference is: in step one, the mass percentage concentration of the aquadag aqueous solution is 18%.
Detailed description of the invention nine: one of present embodiment and detailed description of the invention three to eight difference is: in step 6, the mass percentage concentration of the aquadag aqueous solution is 20%.
Detailed description of the invention ten: a kind of isothermal die forging process shaping dies of present embodiment realizes the thin abdomen of magnesium-rare earth and props up fork isothermal die forging process manufacturing process and carry out according to once step:
One, base: be diameter by magnesium-rare earth raw material be 155mm, length is that the extruded bars of 160mm carries out jumping-up pulling process combining and is shaped, and obtains the magnesium alloy metal plate blank that open die forging causes band arc;
Two, forging and molding: magnesium-rare earth blank obtained for step one is put into box heating resistor stove and heats, takes out when being heated to 170 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 420 DEG C and be incubated 2.5 hours, finally by mold heated to 400 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1450 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.0mm/s, and forging temperature is 420 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, and wherein, the mass percentage concentration of the aquadag aqueous solution is 18%;
Three, cool: the magnesium-rare earth forging semi-finished product knock-pin that step 2 is obtained takes out, air cooling;
Four, a pickling: the forging semi-finished product obtained through step 3 are carried out pickling, has cleared up surface;
Five, wound is repaiied: carried out repairing wound by the forging semi-finished product obtained through step 4, clean out folded part;
Six, finish-forging: the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heats, takes out when being heated to 165 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 390 DEG C and be incubated 2.2 hours, finally by mold heated to 370 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1600 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.2mm/s, and forging temperature is 390 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, and wherein, the mass percentage concentration of the aquadag aqueous solution is 20%;
Seven, white picking: the magnesium alloy forging obtained through step 6 is carried out pickling, washes the graphite on surface, obtains surface-treated and become shape Forging;
Eight, become by the surface-treated that step 7 obtains shape Forging to put into aging furnace and carry out Ageing Treatment, the time is 60 hours, and temperature is 200 DEG C, and the obtained thin abdomen of magnesium-rare earth props up fork finished product.
Method careful design every time blank be shaped and technique that present embodiment is combined by the accuracy controlling of finite element modelling, experiment and structure property, the method successively reducing forging temperature between every time isothermal forging this thin abdomen that has been shaped props up fork forging 6, as shown in Figure 13, the forging smooth in appearance obtained is smooth, becomes shape Forging and thin abdomen to prop up fork and matches.Performance reaches high requirement, and fracture strength reaches 470MPa, and yield strength reaches 383MPa.

Claims (9)

1. the thin abdomen of magnesium-rare earth props up fork isothermal die forging process shaping dies, it is characterized in that: described shaping dies comprises patrix (1), counterdie (2) and push rod (3), the middle part of the upper surface of counterdie (2) is processed with die cavity (2-1) from top to bottom successively and ejects hole (2-2), die cavity (2-1) and to eject hole (2-2) through;
Die plate insert (5) is furnished with in die cavity (2-1), die plate insert (5) is staged die plate insert, the small end of die plate insert (5) is placed in and ejects in hole (2-2), the middle part of the lower surface of patrix (1) is processed with the drift (1-1) matched with die cavity (2-1), the shape of the large end of drift (1-1) and die plate insert (5) and thin abdomen to be formed prop up fork and are equipped with, drift (1-1) stretches in die cavity (2-1), push rod (3) stretches into and ejects in hole (2-2), and the upper surface of push rod (3) leans on the lower surface of the small end of die plate insert (5), patrix (1) and counterdie (2) are separately installed with Electrothermal ring (4), patrix (1) and counterdie (2) are provided with through guide pillar hole (1-3), patrix (1) covers on counterdie (2).
2. the thin abdomen of a kind of magnesium-rare earth according to claim 1 props up fork isothermal die forging process shaping dies, it is characterized in that: described push rod (3) is from top to bottom successively by coaxially to arrange and on all-in-one-piece processed, cylinder (3-1) and lower cylinder (3-2) are formed, the upper end of lower cylinder (3-2) and the lower surface of upper cylinder (3-1) affixed, upper cylinder (3-1) is inserted into and ejects in hole (2-2), and the upper surface of upper cylinder (3-1) leans on die plate insert (5).
3. utilize a kind of isothermal die forging process shaping dies described in claim 1 or 2 to realize the thin abdomen of magnesium-rare earth and prop up fork isothermal die forging process manufacturing process, it is characterized in that: it is realize according to following steps that the thin abdomen of described magnesium-rare earth props up fork isothermal die forging process manufacturing process:
One, base: be diameter by magnesium-rare earth raw material be 155mm, length is that the extruded bars of 160mm carries out jumping-up pulling process combining and is shaped, and obtains the magnesium alloy metal plate blank that open die forging causes band arc;
Two, forging and molding: magnesium-rare earth blank obtained for step one is put into box heating resistor stove and heats, takes out when being heated to 160-180 DEG C, and at the uniformly graphite spraying whey solution of blank, the blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 400-440 DEG C and be incubated 2-2.5 hour, finally by mold heated to 380-410 DEG C, the blank heated is placed in the die cavity of counterdie (2), apply the pressure of 1300 tons ~ 1600 tons to patrix (1) under the effect of forcing press, patrix (1) downstream rate is 0.8-1.2mm/s, forging temperature is 415-425 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, wherein, the mass percentage concentration of the aquadag aqueous solution is 15% ~ 20%,
Three, cool: the magnesium-rare earth forging semi-finished product knock-pin that step 2 is obtained takes out, air cooling;
Four, a pickling: the forging semi-finished product obtained through step 3 are carried out pickling, has cleared up surface;
Five, wound is repaiied: carried out repairing wound by the forging semi-finished product obtained through step 4, clean out folded part;
Six, finish-forging: the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heats, takes out when being heated to 160-180 DEG C, and at the uniformly graphite spraying whey solution of blank, the blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 370-400 DEG C and be incubated 2-2.5 hour, finally by mold heated to 350-370 DEG C, the blank heated is placed in the die cavity of counterdie (2), apply the pressure of 1300 tons ~ 1600 tons to patrix (1) under the effect of forcing press, patrix (1) downstream rate is 0.8-1.2mm/s, forging temperature is 385-395 DEG C, after blank is full of die cavity, forcing press is out of service, be shaped complete obtained forging semi-finished product, wherein, the mass percentage concentration of the aquadag aqueous solution is 15% ~ 20%,
Seven, white picking: the magnesium alloy forging obtained through step 6 is carried out pickling, washes the graphite on surface, obtains surface-treated and become shape Forging;
Eight, become by the surface-treated that step 7 obtains shape Forging to put into aging furnace and carry out Ageing Treatment, the time is 60 hours, and temperature is 200 DEG C, and the obtained thin abdomen of magnesium-rare earth props up fork finished product.
4. the thin abdomen of a kind of magnesium-rare earth according to claim 3 props up fork isothermal die forging process manufacturing process, it is characterized in that: in step 2, the magnesium-rare earth blank that step one is obtained is put into box heating resistor stove and heat, take out when being heated to 170 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 420 DEG C and be incubated 2.5 hours, finally by mold heated to 400 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1400 tons to patrix (1) under the effect of forcing press, patrix (1) downstream rate is 1.0mm/s, and forging temperature is 420 DEG C.
5. the thin abdomen of a kind of magnesium-rare earth according to claim 3 props up fork isothermal die forging process manufacturing process, it is characterized in that: in step 2, the magnesium-rare earth blank that step one is obtained is put into box heating resistor stove and heat, take out when being heated to 180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 440 DEG C and be incubated 2 hours, finally by mold heated to 380 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1300 tons to patrix (1) under the effect of forcing press, patrix (1) downstream rate is 1.2mm/s, and forging temperature is 415 DEG C.
6. the thin abdomen of a kind of magnesium-rare earth according to claim 4 props up fork isothermal die forging process manufacturing process, it is characterized in that: in step 6, the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heat, take out when being heated to 170 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 385 DEG C and be incubated 2.2 hours, finally by mold heated to 360 DEG C, the blank heated is placed in the die cavity of counterdie 2, apply the pressure of 1400 tons to patrix 1 under the effect of forcing press, patrix 1 downstream rate is 1.0mm/s, and forging temperature is 390 DEG C.
7. the thin abdomen of a kind of magnesium-rare earth according to claim 5 props up fork isothermal die forging process manufacturing process, it is characterized in that: in step 6, the forging semi-finished product magnesium-rare earth blank obtained through step 5 is put into box heating resistor stove and heat, take out when being heated to 180 DEG C, and at the uniformly graphite spraying whey solution of blank; The blank having sprayed the aquadag aqueous solution is put into box heating resistor stove, be heated to 400 DEG C and be incubated 2 hours, finally by mold heated to 350 DEG C, the blank heated is placed in the die cavity of counterdie (2), apply the pressure of 1600 tons to patrix (1) under the effect of forcing press, patrix (1) downstream rate is 1.2mm/s, and forging temperature is 385 DEG C.
8. the thin abdomen of a kind of magnesium-rare earth according to claim 3 props up fork isothermal die forging process manufacturing process, it is characterized in that: in step one, the mass percentage concentration of the aquadag aqueous solution is 18%.
9. the thin abdomen of a kind of magnesium-rare earth according to claim 3 props up fork isothermal die forging process manufacturing process, it is characterized in that: in step 6, the mass percentage concentration of the aquadag aqueous solution is 20%.
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