CN107790512A - A kind of backward extrusion technologies of tin bronze QSn7 0.2 - Google Patents
A kind of backward extrusion technologies of tin bronze QSn7 0.2 Download PDFInfo
- Publication number
- CN107790512A CN107790512A CN201710874708.3A CN201710874708A CN107790512A CN 107790512 A CN107790512 A CN 107790512A CN 201710874708 A CN201710874708 A CN 201710874708A CN 107790512 A CN107790512 A CN 107790512A
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- Prior art keywords
- punch
- pin
- extrusion
- plate
- tin bronze
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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
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a kind of backward extrusion technologies of tin bronze QSn7 0.2, comprise the following steps that：（1）Blank is prepared, machining is required size；（2）According to specimen size requirement installation mold, and preheated, be preheated to 200 400 DEG C；（3）Will（1）After middle sample is directly heated to 600 760 DEG C in full induction furnace, it is directly placed into the mould lubricated and carries out backward extrusion；The cups of extrusion forming cool down at room temperature.Technique provided by the invention not only improved efficiency but also improve it is moulding, for tin bronze be processed further provide advantage.
Description
Technical field
The present invention relates to a kind of tin bronze QSn7-0.2 backward extrusion technologies, belong to metal forming field.
Background technology
Tin bronze cup-shape member is one of most representational structure type in the fields such as defence and military, communications and transportation.At present,
For requiring that the higher Model For The Bush-axle Type Parts of performance carry out anti-extrusion, the part material after shaping using Copper alloy material mostly
Utilization rate and machining accuracy are high；Surface quality is good.But high temperature extrusion is needed in the processing technology of extrusion early stage, produce
The range set of middle temperature is wide, when the too high easy hot tearing of temperature, too low extrusion molding poor performance so that tin bronze extrusion profit
Reduced with rate, in addition, being heated by existing heat-treatment furnace time-consuming too big.Therefore in order to solve this problem, technical staff enters
Further investigation is gone.
The content of the invention
For the limitation of prior art, the present invention is made that optimization to existing processing technology and improved, there is provided a kind of
Energy-conservation, tin bronze QSn7-0.2 backward extrusion technologies that are time saving, improving product utilization rate.
The invention provides a kind of tin bronze QSn7-0.2 backward extrusion technologies, 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
Tin bronze bar is heated by way of induction type heats stove heat, the heating-up time needs 60-80s, is warming up to
Without insulation after 600-760 DEG C, backward extrusion is directly carried out, extrusion cools down in atmosphere after the completion of extruding；
4th step：Machining
The extrusion cooled down by machining finally uses size for part.
In above-mentioned technique, the 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；To be convex below cope plate
Mould, punch-pin are fixed by convex mould pad and punch retainer, and punch-pin is T-type structure, and the turning position of T-type structure is provided with convex
Mould locking 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；Cavity plate is fixed in lower template by bolt and straight pin, by being moved down on punch-pin
It is dynamic to be extruded.
In above-mentioned technique, in the 3rd step, tin bronze（QSn7-0.2）600- is heated in full-solid induction heating furnace
760 DEG C, the rate of heat addition is 10-15 DEG C/s, and after being heated to design temperature, taking-up is extruded.
In above-mentioned technique, in extrusion process, extrusion speed 5-7mm/s, crush stroke 100-200mm.
In above-mentioned technique, the specific work process of extruding 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 5-7mm/s, crush stroke 100-200mm, extruded；
（5）After extruding terminates, machine, move up punch-pin, speed 5-7mm/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.
Technical scheme provided by the invention, formability of the alloy in extrusion process is improved, production is greatly improved
Benefit, the time is saved, reduce energy consumption, improve utilization rate.
Beneficial effects of the present invention：
（1）By processing of the present invention process to sample, the heat time only needs 60-80s, drastically increases production efficiency, fits
For mass producing；
（2）In aspect of performance, the average elongation of cups, average section shrinkage factor are significantly improved, and effectively improve cup
The plastic property of shape part, advantage is provided for next step machining and spinning.
Brief description of the drawings
Fig. 1 is the installation diagram of indirect-extrusion mould；
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：
Tin bronze provided by the invention（QSn7-0.2）The heat processing technique of backward extrusion performance, its method are as follows：
（1）Sampling, cuts Φ 65x45mm tin bronze bars
（2）Pretreatment, the bar cut is put into induction heater, is warming up to 650 DEG C with 15 DEG C/s speed, the heating-up time
About 60s（Radiation processes are accompanied by temperature-rise period）；
（3）Bar is put into after the completion of heating warmed-up（About 400 DEG C）In the good and indirect-extrusion mould (Fig. 1) of sufficient lubrication
Extruded, by extrusion air cooling after the completion of extruding；
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 5mm/s,
Crush stroke 100mm, is extruded；After 5. extruding terminates, machine, move up punch-pin, speed 5mm/s is mobile
Stroke 100mm；6. after the completion of mobile, opening striker plate, the cups that extruding is completed are taken out；7. to cavity plate, punch-pin continuous lubrication,
Place into bar, repeat step 4. -6.；8. after the completion of final extruding, machine is cleared up, concave-convex mold and other parts are moistened again
It is sliding；9. shut down.
（4）Machining, will（3）Middle cooling samples are part final size by turnery processing；
Embodiment 2：
（1）Sampling, cuts Φ 55x42mm tin bronze bars
（2）Pretreatment, the bar cut is put into induction heater, and 650 DEG C are warming up to 12 DEG C/s speed, during heating
Between be 75s（Radiation processes are accompanied by temperature-rise period）；
（3）Bar is put into after the completion of heating warmed-up（About 400 DEG C）Squeezed in the good and indirect-extrusion mould of sufficient lubrication
Pressure, by extrusion air cooling after the completion of extruding
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. preheating after the completion of, toward cavity plate in be put into the bar heated,
And close tight striker plate；4. machining, move down punch-pin, speed is 5 mm/s, crush stroke 100mm, is extruded；
After 5. extruding terminates, machine, move up punch-pin, speed is 5 mm/s, shift motion 100mm；6. mobile complete
Afterwards, striker plate is opened, takes out the cups that extruding is completed；7. to cavity plate, punch-pin 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. shut down.
（4）Machining, will（3）Middle cooling samples are part final size by turnery processing.
Claims (6)
1. a kind of tin bronze QSn7-0.2 backward extrusion technologies, 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
Tin bronze bar is heated by way of induction type heats stove heat, the heating-up time needs 60-80s, is warming up to
Without insulation after 600-760 DEG C, backward extrusion is directly carried out, extrusion cools down in atmosphere after the completion of extruding；
4th step：Machining
The extrusion cooled down by machining finally uses size for part.
2. tin bronze QSn7-0.2 backward extrusion technologies according to claim 1, it is characterised in that：The indirect-extrusion mould bag
Cope plate, lower template are included, is cavity plate above lower template, cavity plate is fixed by cavity plate backing plate and cavity plate retainer plate, in cavity plate
Side is provided with cushion block, and cushion block bottom is push rod；It is punch-pin below cope plate, punch-pin is consolidated 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, stripper are provided with the middle part of punch-pin
It is bolted on cavity plate retainer plate.
3. tin bronze QSn7-0.2 backward extrusion technologies according to claim 2, it is characterised in that：Cope plate, convex mould pad
And punch retainer is fixed by straight pin and bolt, then by punch-pin to be bolted on punch retainer；Cavity plate leads to
Cross bolt and straight pin is fixed in lower template, extruded by moving up and down for punch-pin.
4. tin bronze QSn7-0.2 backward extrusion technologies according to claim 1, it is characterised in that：In 3rd step, tin bronze
Bar is heated to 600-760 DEG C in induction heater, and the rate of heat addition is 10-15 DEG C/s, after being heated to design temperature, takes out
Extruded.
5. tin bronze QSn7-0.2 backward extrusion technologies according to claim 4, it is characterised in that：In extrusion process, extruding
Speed is 5-7mm/s, crush stroke 100-200mm.
6. tin bronze QSn7-0.2 backward extrusion technologies according to claim 4, it is characterised in that：The specific works mistake of extruding
Cheng Wei：
（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 5-7mm/s, crush stroke 100-200mm, extruded；
（5）After extruding terminates, machine, move up punch-pin, speed 5-7mm/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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710874708.3A CN107790512A (en) | 2017-09-25 | 2017-09-25 | A kind of backward extrusion technologies of tin bronze QSn7 0.2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710874708.3A CN107790512A (en) | 2017-09-25 | 2017-09-25 | A kind of backward extrusion technologies of tin bronze QSn7 0.2 |
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| CN107790512A true CN107790512A (en) | 2018-03-13 |
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| CN201710874708.3A Pending CN107790512A (en) | 2017-09-25 | 2017-09-25 | A kind of backward extrusion technologies of tin bronze QSn7 0.2 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857269A (en) * | 2018-05-30 | 2018-11-23 | 昆明冶金研究院 | A kind of Combined bottle manufacturing method of aluminium alloy LPG cylinder |
| CN111438211A (en) * | 2020-03-02 | 2020-07-24 | 西安斯瑞先进铜合金科技有限公司 | Hot extrusion process of lower outgoing line blank for embedded pole |
| CN112404337A (en) * | 2020-10-21 | 2021-02-26 | 洛阳市洛凌轴承科技股份有限公司 | NU2300 series bearing sleeve forging process |
| CN114082799A (en) * | 2021-11-17 | 2022-02-25 | 海安北京机电研究所锻压产业研发中心 | Back extrusion die of nitrogen spring cylinder based on high-temperature self-propagating technology and machining process of back extrusion die |
| US11713272B2 (en) | 2019-03-05 | 2023-08-01 | Corning Incorporated | System and methods for processing an optical fiber preform |
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| CN106607468A (en) * | 2017-01-07 | 2017-05-03 | 中北大学 | Differential-speed extrusion forming method of magnesium alloy high performance cup-shaped piece |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108857269A (en) * | 2018-05-30 | 2018-11-23 | 昆明冶金研究院 | A kind of Combined bottle manufacturing method of aluminium alloy LPG cylinder |
| CN108857269B (en) * | 2018-05-30 | 2020-06-05 | 昆明冶金研究院 | Method for manufacturing combined bottle body of aluminum alloy petroleum liquefied gas bottle |
| US11713272B2 (en) | 2019-03-05 | 2023-08-01 | Corning Incorporated | System and methods for processing an optical fiber preform |
| CN111438211A (en) * | 2020-03-02 | 2020-07-24 | 西安斯瑞先进铜合金科技有限公司 | Hot extrusion process of lower outgoing line blank for embedded pole |
| CN112404337A (en) * | 2020-10-21 | 2021-02-26 | 洛阳市洛凌轴承科技股份有限公司 | NU2300 series bearing sleeve forging process |
| CN112404337B (en) * | 2020-10-21 | 2024-04-12 | 洛阳市洛凌轴承科技股份有限公司 | NU2300 series bearing sleeve forging process |
| CN114082799A (en) * | 2021-11-17 | 2022-02-25 | 海安北京机电研究所锻压产业研发中心 | Back extrusion die of nitrogen spring cylinder based on high-temperature self-propagating technology and machining process of back extrusion die |
| CN114082799B (en) * | 2021-11-17 | 2024-02-23 | 海安北京机电研究所锻压产业研发中心 | Backward extrusion die of nitrogen spring cylinder body based on high-temperature self-propagating technology and processing technology of backward extrusion die |
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Application publication date: 20180313 |