CN107755446A - A kind of processing technology of raising DT4C pure iron magnetic behaviors - Google Patents
A kind of processing technology of raising DT4C pure iron magnetic behaviors Download PDFInfo
- Publication number
- CN107755446A CN107755446A CN201710875730.XA CN201710875730A CN107755446A CN 107755446 A CN107755446 A CN 107755446A CN 201710875730 A CN201710875730 A CN 201710875730A CN 107755446 A CN107755446 A CN 107755446A
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- China
- Prior art keywords
- punch
- pin
- plate
- pure iron
- processing technology
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/20—Making uncoated products by backward extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention discloses a kind of processing technology for improving pure iron DT4C magnetic behaviors, comprise the following steps that：（1）Blank is prepared, machining is required size, is pre-processed；（2）According to specimen size requirement installation mold, and preheated, be preheated to 200 DEG C 400 DEG C；（3）Will（1）Middle sample is put into the mould lubricated and extruded；（4）The cups of extrusion molding are made annealing treatment；(5) annealed sample is machined to use size.The inventive method both improves utilization rate, improves magnetic behavior again, and advantage is provided for DT4C further development.
Description
Technical field
The present invention relates to a kind of processing technology for improving pure iron DT4C magnetic behaviors, belong to metal magnetic technical field.
Background technology
Electrical pure iron is widely used in the component of instrument as soft magnetic materials, such as magnetic pole piece, rotor, housing
Deng especially electrical pure iron is mainly characterized by having low impurity in terms of magnetic, and has very high magnetic under moderate magnetic field
Conductance and magnetic saturation and very low magnetic hysteresis loss.But its magnetic has its unstability, such as more than 50 DEG C when have it is obvious
Magnetic aging phenomenon and magnetic is degenerated.Therefore, in order to improve the magnetic of pure iron, except smelting, in addition to the strict control of heat treatment, it zero
For part in forming process, different processes and various technological factors can all influence the magnetic of material to some extent.So
To grasp degree of the technological factor of electrical pure iron to effect of magnetic influence, it is proposed that this work.
The content of the invention
Low using the utilization rate of purely mechanic rapidoprint for current hollow cups product, magnetic behavior is poor to ask
Topic, the present invention, which proposes, a kind of material-saving and can improve the processing technology of pure iron cup shell magnetic behavior.
The invention provides a kind of processing technology for improving pure iron DT4C magnetic behaviors, comprise the following steps：
The first step：Prepare blank
Specimen size needed for basis, cuts bar before extruding；
Second step：The installation of extrusion die
Indirect-extrusion mould is arranged on four-column type hydraulic press；200 DEG C -400 is preheating to after installing to indirect-extrusion mould
℃；
3rd step：Heat processing technique
800 DEG C -900 DEG C are warming up to using vacuum heat treatment furnace, pure iron DT4C bars is put into and it is heated, in vacuum atmosphere
After middle insulation 1-4h, it is immediately placed in the warmed-up good and indirect-extrusion mould of sufficient lubrication and is extruded, squeezed after the completion of extruding
Casting die cools down in atmosphere, is made annealing treatment after cooling；
4th step：Machining
It is that part finally uses size by machining part of annealing, must be in time cooled down with emulsion during processing, prevent from processing
Hardening.
In above-mentioned technique, indirect-extrusion mould includes cope plate, lower template, is cavity plate above lower template, cavity plate passes through cavity plate
Backing plate and cavity plate retainer plate are fixed, and are provided with cushion block on the inside of cavity plate, cushion block bottom is push rod；It is punch-pin below cope plate, it is convex
Mould is fixed by convex mould pad and punch retainer, and punch-pin is T-type structure, and the turning position of T-type structure is locked provided with punch-pin
Tight nut；Stripper is provided with the middle part of punch-pin, stripper is bolted on cavity plate retainer plate.
Further, cope plate, convex mould pad and punch retainer are fixed by straight pin and bolt, then by punch-pin
To be bolted on punch retainer.
Further, cavity plate is fixed in lower template by bolt, straight pin, is squeezed by moving up and down for punch-pin
Pressure.
The specific work process of extruding is：（1）Start；（2）Cavity plate, punch-pin are preheated and lubricated；（3）Preheating is completed
Afterwards, toward being put into the bar that heats in cavity plate, and tight striker plate is closed；（4）Machine, move down punch-pin, speed 7-
8mm/s, crush stroke 100-200mm, is extruded；（5）After extruding terminates, machine, move up punch-pin, speed is
7-8mm/s, shift motion 100-200mm；（6）After the completion of movement, striker plate is opened, takes out the cups that extruding is completed；（7）It is right
Concave-convex mold continuous lubrication, place into bar, repeat step（4）-（6）；（8）After the completion of final extruding, machine is cleared up, again to recessed
Punch-pin and other component lubrications；（9）Shutdown.
In above-mentioned technique, in the 3rd step, annealing, specifically the extrusion after cooling is put into vacuum drying oven and added with stove
4-6h, and furnace cooling are incubated after hot to 800-900 DEG C.
The present invention has an advantageous effect in that compared with prior art：Pass through processing of the new technology to sample, the profit of material
70% or so is improved with rate, magnetic flux improves 50% or so, and coercivity have dropped 30% or so.
Brief description of the drawings
Fig. 1 is indirect-extrusion mould installation diagram；
Fig. 2 is the structural representation of cup shell.
In figure：1- push rods, 2- cushion blocks, 3- lower templates, 4- cavity plate backing plates, 5- cavity plate retainer plates, 6- soket head cap screws, 7- are recessed
Mould, 8- strippers, 9- punch-pin locking nuts, 10- punch-pin, 11- punch retainers, 12- punch-pin fixing bolts, 13- cope plates,
14- convex mould pads, 15- straight pins.
Embodiment
The present invention is further illustrated below by embodiment, but is not limited to following examples.
Embodiment 1：
Pure iron provided by the invention（DT4C）The processing technology of magnetic behavior is extruded, its method and step is as follows：
（1）Sampling, cuts Φ 65x45mmDT4C bars, is put into and has been heated to 850 DEG C of vacuum drying oven inside holding 1h；
（2）Pretreatment, the bar for being incubated completion is put into the warmed-up good and indirect-extrusion mould (see Fig. 1) of sufficient lubrication
Row extruding, extrusion（See Fig. 2）After the completion of air cooling；
The structure of extrusion die is：Indirect-extrusion mould includes cope plate 13, lower template 3, and the top of lower template 3 is cavity plate 7, cavity plate 7
It is fixed by cavity plate backing plate 4 and cavity plate retainer plate 5, the inner side of cavity plate 7 is provided with cushion block 2, and the bottom of cushion block 2 is push rod 1；Cope plate
13 lower sections are punch-pin 10, and punch-pin 10 is fixed by convex mould pad 14 and punch retainer 11, and punch-pin 10 is T-type structure, T-shaped
The turning position of structure is provided with punch-pin locking nut 9；Stripper 8 is provided with the middle part of punch-pin, stripper 8 is bolted on cavity plate
On retainer plate 5.
Further, cope plate 13, convex mould pad 14 and punch retainer 11 are fixed by straight pin 15 and bolt, so
Afterwards by punch-pin 10 to be bolted on punch retainer 11.
Further, cavity plate 7 is fixed in lower template 3 by soket head cap screw 6, straight pin, by being moved down on punch-pin
It is dynamic to be extruded.
The specific work process of extruding is：1. start shooting；2. cavity plate, punch-pin are preheated and lubricated；3. after the completion of preheating,
The bar heated is put into toward cavity plate, and closes tight striker plate；4. machining, move down punch-pin, speed 7-8mm/
S, crush stroke 100-200mm, is extruded；After 5. extruding terminates, machine, move up punch-pin, speed 7-
8mm/s, shift motion 100-200mm；6. after the completion of mobile, opening striker plate, the cups that extruding is completed are taken out；7. to recessed
Mould, punch-pin continuous lubrication, place into bar, repeat step 4. -6.；8. after the completion of final extruding, machine is cleared up, again to bumps
Mould and other component lubrications；9. shut down.
（3）Annealing, will（2）Middle extrusion is put into vacuum drying oven with stove heat to being incubated 4h after 900 DEG C, and cold with stove
But；
（4）Machining, will（3）Middle cooling samples are part final size by turnery processing；
（5）According to national standard GB/T 3656-2008 and GB/T 6983-2008, in Taiyuan steel enterprise technique center physical and chemical experiment
Room measures its magnetic conductivity and magnetic flux, draws：Original processing mode（I.e. by purely mechanic processing mode, bar is processed as
Cups, processing dimension are consistent with the processing dimension of new technology of the present invention）The cups coercivity of processing is：28.84A/m magnetic
Flux is 12.38H/m, the rear cups coercivity 23.57A/m of new technology processing, magnetic flux 20.13H/m, and coercivity declines
5.27 A/m, magnetic flux increase 7.75 H/m.
Embodiment 2
Pure iron provided by the invention（DT4C）The processing technology of magnetic behavior is extruded, its method and step is as follows：
（1）Sampling, cuts Φ 55x42mmDT4C bars, is put into and has been heated to 850 DEG C of vacuum drying oven inside holding 1h；
（2）Pretreatment, the bar for being incubated completion is put into the warmed-up good and indirect-extrusion mould (see Fig. 1) of sufficient lubrication
Row extruding, extrusion（See Fig. 2）After the completion of air cooling；
It is same as Example 1 using the extrusion die described in embodiment 1, extrusion process in the present embodiment.
（3）Annealing, will（2）Middle extrusion is put into vacuum drying oven with stove heat to being incubated 4h after 900 DEG C, and cold with stove
But；
（4）Machining, will（3）Middle cooling samples are part final size by turnery processing；
（5）According to national standard GB/T 3656-2008 and GB/T 6983-2008, in Taiyuan steel enterprise technique center physical and chemical experiment
Room measures its magnetic conductivity and magnetic flux, draws：Original processing mode（I.e. by purely mechanic processing mode, bar is processed as
Cups, processing dimension are consistent with the processing dimension of new technology）The cups coercivity of processing is：27.68A/m magnetic flux is
12.85H/m, the rear cups coercivity 21.54A/m of new technology processing, magnetic flux 23.48H/m, coercivity have dropped
6.94A/m, magnetic flux increase 10.63 H/m.
The present invention is explained in detail above in conjunction with embodiment, but the present invention is not limited to above-described embodiment, at this
In the those of ordinary skill's possessed knowledge of field, various changes can also be made on the premise of present inventive concept is not departed from
Change.
Claims (8)
1. a kind of processing technology for improving pure iron DT4C magnetic behaviors, it is characterised in that comprise the following steps：
The first step：Prepare blank
Specimen size needed for basis, cuts bar before extruding；
Second step：The installation of extrusion die
Indirect-extrusion mould is arranged on four-column type hydraulic press；200 DEG C -400 is preheating to after installing to indirect-extrusion mould
℃；
3rd step：Heat processing technique
800 DEG C -900 DEG C are warming up to using vacuum heat treatment furnace, pure iron DT4C bars is put into and it is heated, in vacuum atmosphere
After middle insulation 1-4h, it is immediately placed in the warmed-up good and indirect-extrusion mould of sufficient lubrication and is extruded, squeezed after the completion of extruding
Casting die cools down in atmosphere, is made annealing treatment after cooling；
4th step：Machining
It is that part finally uses size by machining annealing part.
2. the processing technology according to claim 1 for improving pure iron DT4C magnetic behaviors, it is characterised in that：Indirect-extrusion mould
It is cavity plate above lower template, cavity plate is fixed by cavity plate backing plate and cavity plate retainer plate, cavity plate including cope plate, lower template
Inner side is provided with cushion block, and cushion block bottom is push rod；It is punch-pin below cope plate, punch-pin is carried out by convex mould pad and punch retainer
Fixed, punch-pin is T-type structure, and the turning position of T-type structure is provided with punch-pin locking nut；Stripper, the material returned are provided with the middle part of punch-pin
Plate is bolted on cavity plate retainer plate.
3. the processing technology according to claim 2 for improving pure iron DT4C magnetic behaviors, it is characterised in that：It is cope plate, convex
Die-cushion plate and punch retainer are fixed by straight pin and bolt, then by punch-pin to be bolted on punch retainer.
4. the processing technology according to claim 2 for improving pure iron DT4C magnetic behaviors, it is characterised in that：Cavity plate passes through spiral shell
Bolt, straight pin are fixed in lower template, are extruded by moving up and down for punch-pin.
5. the processing technology according to claim 1 for improving pure iron DT4C magnetic behaviors, it is characterised in that：Extrusion process
In, extrusion speed 7-8mm/s, crush stroke 100-200mm.
6. the processing technology according to claim 1 for improving pure iron DT4C magnetic behaviors, it is characterised in that：What is extruded is specific
The course of work is：
（1）Start；
（2）Cavity plate, punch-pin are preheated and lubricated；
（3）After the completion of preheating, toward cavity plate in be put into the bar heated, and close tight striker plate；
（4）Machine, move down punch-pin, speed 7-8mm/s, crush stroke 100-200mm, extruded；
（5）After extruding terminates, machine, move up punch-pin, speed 7-8mm/s, shift motion 100-200mm；
（6）After the completion of movement, striker plate is opened, takes out the cups that extruding is completed；
（7）To concave-convex mold continuous lubrication, bar, repeat step are placed into（4）-（6）；
（8）After the completion of final extruding, machine is cleared up, again to concave-convex mold and other component lubrications；
（9）Shutdown.
7. the processing technology according to claim 1 for improving pure iron DT4C magnetic behaviors, it is characterised in that：In 3rd step,
Annealing, specifically the extrusion after cooling is put into vacuum drying oven with stove heat to being incubated 4-6h after 800-900 DEG C, and with
Stove cools down.
8. the processing technology according to claim 1 for improving pure iron DT4C magnetic behaviors, it is characterised in that：4th step
In, it must in time be cooled down with emulsion during processing, prevent processing from hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710875730.XA CN107755446A (en) | 2017-09-25 | 2017-09-25 | A kind of processing technology of raising DT4C pure iron magnetic behaviors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710875730.XA CN107755446A (en) | 2017-09-25 | 2017-09-25 | A kind of processing technology of raising DT4C pure iron magnetic behaviors |
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| Publication Number | Publication Date |
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| CN107755446A true CN107755446A (en) | 2018-03-06 |
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| CN201710875730.XA Pending CN107755446A (en) | 2017-09-25 | 2017-09-25 | A kind of processing technology of raising DT4C pure iron magnetic behaviors |
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Cited By (2)
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| CN108500078A (en) * | 2018-04-25 | 2018-09-07 | 中北大学 | The special gradual device for discharging of Gleeble-3500 testing machines |
| CN110802191A (en) * | 2019-07-12 | 2020-02-18 | 江苏创一精锻有限公司 | Cup-shaped body forming die with boss at bottom of inner cavity and process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500078A (en) * | 2018-04-25 | 2018-09-07 | 中北大学 | The special gradual device for discharging of Gleeble-3500 testing machines |
| CN110802191A (en) * | 2019-07-12 | 2020-02-18 | 江苏创一精锻有限公司 | Cup-shaped body forming die with boss at bottom of inner cavity and process |
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Application publication date: 20180306 |
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