CN103817331A - Device and method for achieving powder metallurgy sintering material surface compacting through rolling - Google Patents
Device and method for achieving powder metallurgy sintering material surface compacting through rolling Download PDFInfo
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- CN103817331A CN103817331A CN201410068695.7A CN201410068695A CN103817331A CN 103817331 A CN103817331 A CN 103817331A CN 201410068695 A CN201410068695 A CN 201410068695A CN 103817331 A CN103817331 A CN 103817331A
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Abstract
The invention discloses a device for achieving powder metallurgy sintering material surface compacting through rolling. The device comprises a work platform, a power assembly, a rotating chuck, a driven chuck and a rolling assembly, wherein the work platform is provided with a guide rail, the rotating chuck and the driven chuck are arranged on the work platform, the power assembly is connected with the rotating chuck, and the rolling assembly is arranged between the rotating chuck and the driven chuck and comprises a sliding plate connected to the guide rail and a rolling mechanism arranged on the sliding plate. The invention further discloses a method for achieving powder metallurgy sintering material surface compacting through rolling. According to the device and method, the two ends of a rolling material are clamped, the phenomena that the rolling material shakes and is stressed to be bent in the rolling machining process are effectively reduced, a good compacting effect can be achieved on the surface of a powder metallurgy material, the performance of the material is obviously improved, the rolling assembly can move transversely, and the device and the method can be used for machining a long shaft in a rolling mode.
Description
Technical field
The present invention relates to the densified device and method of a kind of powder metallurgy sintered material surface, particularly a kind ofly realize the densified device and method of powder metallurgy sintered material surface by roll extrusion.
Background technology
The production process of prior powder metallurgy part is sintering after powder compaction.But the powdered metal parts density of conventional sintering is not generally higher than 7.2g/cm
3, superficial layer contains a large amount of holes, affects the serviceability of part.Along with the development of PM technique, a lot of methods that improve powdered metallurgical material density are proposed, as power forging, high velocity compacted, temperature and pressure technology etc., but these technology production equipment costlinesses, production cost is high, has limited the application of powdered metal parts.
Summary of the invention
The object of the invention is: provide a kind of simple in structure, manufacture low and easy and simple to handle the realizing the densified device of powder metallurgy sintered material surface and use the rolling depression method of this device by roll extrusion of processing cost.
Object of the present invention is achieved through the following technical solutions: a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, comprise workbench, Power Component, rotational chuck, driven chuck and roll extrusion assembly, on described workbench, be provided with guide rail, rotational chuck and driven chuck are arranged on described workbench, Power Component is connected with rotational chuck, roll extrusion assembly is arranged between rotational chuck and driven chuck, and described roll extrusion assembly comprises and is connected to the slide plate on guide rail and is arranged on the rolling mechanism on described slide plate.
Preferably, described roll extrusion assembly has radial feed bar, and radial feed bar is axially arranged with the screw thread that two rotation directions are contrary, and described rolling mechanism is two and is oppositely arranged, two rolling mechanisms are connected to two spiral shells on contrary screw thread, and radial feed bar is connected with Power Component.
Preferably, described roll extrusion assembly has axial feed bar, and axial feed bar is provided with screw thread, and described slide plate is connected on axial feed bar, and Power Component is connected with axial feed bar.
Preferably, on described guide rail, be provided with tailstock, have locking piece on tailstock, described driven chuck is arranged on tailstock and is oppositely arranged with rotational chuck.
Preferably, described driven chuck comprises urceolus and drill chuck, in described urceolus, is provided with bearing, and drill chuck is connected with bearing, and urceolus is arranged on tailstock.
Preferably, the gearbox that described Power Component comprises main motor and is connected with described main motor, gearbox is connected with described rotational chuck.
Preferably, described rotational chuck is scroll chuck.
Preferably, described rolling mechanism comprises milled head, pressure head connecting rod, inner sleeve, front sleeve, pressure sensor and rear end cap, milled head is connected on pressure head connecting rod, pressure head connecting rod lock onto in inner sleeve, front sleeve is socketed in outside inner sleeve, after pressure sensor is connected to pressure head connecting rod and with rear end cap, is connected.
Preferably, described rolling mechanism also comprises rear sleeve, first piston, the second piston, the 3rd piston and rigid connecting adapter, rear sleeve is fixedly connected with front sleeve, rear end cap is fixedly connected on the rear end of rear sleeve, first piston is arranged in front sleeve and a side is fixedly connected with inner sleeve and/or pressure head connecting rod, the second piston and the 3rd piston are arranged in rear sleeve, first piston opposite side is connected with the second piston, the second piston is taken over the 3rd piston and is connected by rigid connecting, and described pressure sensor contacts with the 3rd piston.
Realize the densified method of powder metallurgy sintered material surface, use and above-mentioned realize the densified device of powder metallurgy sintered material surface by roll extrusion and carry out roll extrusion, what two rolling mechanisms were relative carries out roll extrusion at powder metallurgy sintered material surface.
The present invention has following advantage and effect:
1, the present invention is a kind of realizes the densified device of powder metallurgy sintered material surface by roll extrusion clamping is carried out in the two ends of roll extrusion material, effective phenomenon that reduces the vibrations of roll extrusion material in rolling and processing process and avoid stressed bending, can produce good densified effect to powdered metallurgical material surface, and material property is improved significantly, roll extrusion assembly can transverse shifting, can be used for the rolling and processing of major axis, and simple in structure, easy and simple to handle, processing cost is low.
2, improve powder metallurgy density method with respect to other, rolling and processing of the present invention can improve the density of powder metallurgy sintered material surface, forms surface compact layer, even can be entirely fine and close, produce strengthening effect, and can also make material surface roughness reduce, produce polishing effect.From piece surface, centripetal portion forms certain density gradient, improves the mechanical property of powdered metal parts, extends the service life of part, has expanded the range of application of powdered metal parts.Rolling and processing cost is low, and equipment is simple, and make powder metallurgy surface densification technology become of powder metallurgy development has the direction of using value very much.
3, the situation of change of power when being provided with pressure sensor and can detecting rolling and processing in real time due to rolling mechanism of the present invention, rolling mechanism be fixedly installed do not pass through spring, hanger or hydraulic pressure transfer roll extrusion power, therefore after can accurately recording the size of the roll extrusion power applying when roll extrusion starts and accurately recording roll extrusion, residue applies the size of power, roll extrusion power is an important parameter that affects roll extrusion effect, can be simple when accurately measuring roll extrusion power size and contributing to rolling and processing, convenient and the accurate amount of feeding of controlling, milled head has high rigidity, therefore the workpiece surface roughness that rolls out is low and can not produce distortion, rolling mechanism also has simple in structure, easy and simple to handle, the advantage of low cost of manufacture.
What 4, a kind of rolling depression method two rolling mechanisms of the present invention were relative carries out roll extrusion at powder metallurgy sintered material surface, when roll extrusion, can cancel out each other to the active force of material, avoid material production bending or roll extrusion less than phenomenon.
Accompanying drawing explanation
Fig. 1 is the cutaway view of rolling mechanism of the present invention.
Fig. 2 is the structural representation of rolling mechanism of the present invention.
Fig. 3 is the stereogram that rolling mechanism of the present invention is installed fixed head and stiffener.
Fig. 4 is that inner sleeve of the present invention is installed on the profile in front sleeve.
Fig. 5 is the schematic diagram of ball-type milled head of the present invention.
Fig. 6 is a kind of top view of realizing the densified device of powder metallurgy sintered material surface by roll extrusion of the present invention.
Fig. 7 is a kind of front view of realizing the densified device of powder metallurgy sintered material surface by roll extrusion of the present invention.
Fig. 8 is the structural representation of roll extrusion assembly of the present invention.
Fig. 9 is the structural representation of driven chuck of the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment mono-:
As shown in Fig. 1-9, a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, comprise workbench 31, Power Component, rotational chuck 32, driven chuck 33 and roll extrusion assembly, on described workbench 31, be provided with guide rail 35, rotational chuck 32 and driven chuck 33 are arranged on described workbench 31, Power Component is connected with rotational chuck 32, roll extrusion assembly is arranged between rotational chuck 32 and driven chuck 33, and described roll extrusion assembly comprises the slide plate 36 being connected on guide rail 35 and is arranged on the rolling mechanism 34 on described slide plate 36.On described guide rail 35, be provided with tailstock 37, on tailstock 37, there is locking piece, described driven chuck 33 is arranged on tailstock 37 and is oppositely arranged with rotational chuck 32, described driven chuck 33 comprises urceolus 44 and drill chuck 43, the interior front and back of described urceolus 44 are provided with bearing 45, drill chuck 43 is connected with bearing 45, and urceolus 44 is arranged on tailstock 37.Described rotational chuck 32 is scroll chuck.Clamping is carried out in the two ends of roll extrusion material, effectively reduce the vibrations of roll extrusion material in rolling and processing process and avoid the phenomenon of stressed bending, thereby guarantee that roll extrusion puts in place.
Gearbox 39, axial feed motor 40 and application of force handle 41 that described Power Component comprises main motor 38, is connected with described main motor 38, gearbox 39 is connected with described rotational chuck 32.Described roll extrusion assembly has the radial feed bar 42 being connected with described application of force handle 41, radial feed bar 42 axially front and back is respectively equipped with the screw thread that two rotation directions are contrary, described rolling mechanism 34 is two and is oppositely arranged, and two rolling mechanisms 34 are connected to two spiral shells on contrary screw thread.Described roll extrusion assembly has the axial feed bar 46 being connected with described axial feed motor 40, and axial feed bar 46 is provided with screw thread, and described slide plate 36 is connected on axial feed bar 46.
Embodiment bis-:
As Figure 1-5, described rolling mechanism 34 comprises milled head 1, pressure head connecting rod 2, inner sleeve 3, front sleeve 4, pressure sensor 5, rear sleeve 6, first piston 7, the second piston 8, the 3rd piston 9, rigid connecting adapter 10 and rear end cap 11, milled head 1 is connected on pressure head connecting rod 2, pressure head connecting rod 2 lock onto in inner sleeve 3, front sleeve 4 is socketed in outside inner sleeve 3, pressure sensor 5 is connected to the rear of pressure head connecting rod 2, rear sleeve 6 is fixedly connected with front sleeve 4, rear end cap 11 is fixedly connected on the rear end of rear sleeve 6, first piston 7 is arranged in front sleeve 4 and a side is fixedly connected with inner sleeve 3 and/or pressure head connecting rod 2, the second piston 8 and the 3rd piston 9 are arranged in rear sleeve 6, first piston 7 opposite sides are connected with the second piston 8, the second piston 8 is taken over 10 by rigid connecting and is connected with the 3rd piston 9, described pressure sensor 5 is connected on rear end cap 11 and with the 3rd piston 9 and contacts.
Between described the second piston 8 and the 3rd piston 9, having certain spacing can linking springs, can switch on demand elasticity roll extrusion, and after linking springs, rigid connecting is taken over 10 and can be removed.
Described front sleeve 4 is provided with groove, and inner sleeve 3 inside are square hole, and profile is that the groove of cylindrical and corresponding front sleeve 4 is provided with the guide pillar that restriction inner sleeve 3 rotates in front sleeve 4.
Described milled head 1 is ball-type milled head, on pressure head connecting rod 2 front end faces, dig hemispheric milled head mounting groove, on milled head mounting groove, being connected with milled head prevents raising one's hat 21, in milled head mounting groove, be placed with rolling ball 22 and described ball-type milled head, ball-type milled head part protrudes from the anti-21 outer and ball-type milled heads of raising one's hat of milled head prevents raising one's hat being provided with anticreep ball 23 between 21 with milled head, and anticreep ball 23 contacts with ball-type milled head.
Described milled head 1 can also be roller milled head, and pressure head connecting rod 2 front ends are connected with roller bearing 12, and roller milled head 1 is connected to the front end of pressure head connecting rod 2 by described roller bearing 12.
Also comprise that two fixed heads 13 for fixing rolling mechanism 34 that are fixedly connected on rolling mechanism 34, eight clamping screws 14 and outer sleeve 15, two fixed head both sides are connected with respectively two stiffeners 16.Pressure head connecting rod 2 lock onto in inner sleeve 3 by described clamping screw 14, every four clamping screws 14 are one group, every group circumferentially arranges 14 of each clamping screws around inner sleeve 3 and is separated by 90 °, with assurance, pressure head connecting rod 2 is locked, two groups of clamping screw 14 front and back arrange, preceding clamping screw 14 protrudes from inner sleeve 3, posterior clamping screw 14 is inlaid in inner sleeve 3, preceding like this clamping screw 14 plays the effect that limits stroke, and posterior clamping screw 14 can avoid hindering the slip of inner sleeve 3.Described outer sleeve 15 is socketed on rear sleeve 6 together with rear sleeve 6 being fixed on front sleeve 4 on front sleeve 4.Described first piston 7 matched in clearance are in front sleeve 4, and described the second piston 8 and the 3rd piston 9 matched in clearance are in rear sleeve 6.Between described rear end cap 11 and rear sleeve 6, be provided with the wire casing 18 for stretching out for the data wire of pressure sensor 5.
The course of work of the present invention and operation principle: in rolling process, roll extrusion power is successively from milled head, pressure head connecting rod, first piston, the second piston, rigid connecting is taken over and the 3rd piston is delivered to pressure sensor, pressure sensor rear end is connected with rear end cap, do not pass through spring, hanger or hydraulic pressure transfer roll extrusion power, therefore after can accurately recording the size of the roll extrusion power applying when roll extrusion starts and accurately recording roll extrusion, residue applies the size of power, and roll extrusion power is an important parameter that affects roll extrusion effect, can be simple when accurately measuring roll extrusion power size and contributing to rolling and processing, convenient and the accurate amount of feeding of controlling, milled head has high rigidity, therefore the workpiece surface roughness that rolls out is low and can not produce distortion, and also have simple in structure, easy and simple to handle, the advantage of low cost of manufacture.
Embodiment tri-:
Realize the densified method of powder metallurgy sintered material surface, use realizing the densified device of powder metallurgy sintered material surface by roll extrusion and carrying out roll extrusion of the above, what two rolling mechanisms were relative carries out roll extrusion at powder metallurgy sintered material surface.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. realize the densified device of powder metallurgy sintered material surface by roll extrusion for one kind, it is characterized in that: comprise workbench, Power Component, rotational chuck, driven chuck and roll extrusion assembly, on described workbench, be provided with guide rail, rotational chuck and driven chuck are arranged on described workbench, Power Component is connected with rotational chuck, roll extrusion assembly is arranged between rotational chuck and driven chuck, and described roll extrusion assembly comprises and is connected to the slide plate on guide rail and is arranged on the rolling mechanism on described slide plate.
2. according to claim 1ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: described roll extrusion assembly has radial feed bar, radial feed bar is axially arranged with the screw thread that two rotation directions are contrary, described rolling mechanism is two and is oppositely arranged, two rolling mechanisms are connected to two spiral shells on contrary screw thread, and radial feed bar is connected with Power Component.
3. according to claim 1ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: described roll extrusion assembly has axial feed bar, axial feed bar is provided with screw thread, described slide plate is connected on axial feed bar, and Power Component is connected with axial feed bar.
4. according to claim 1ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: on described guide rail, be provided with tailstock, on tailstock, have locking piece, described driven chuck is arranged on tailstock and is oppositely arranged with rotational chuck.
5. according to claim 4ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: described driven chuck comprises urceolus and drill chuck, in described urceolus, be provided with bearing, drill chuck is connected with bearing, and urceolus is arranged on tailstock.
6. according to claim 1ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: the gearbox that described Power Component comprises main motor and is connected with described main motor, gearbox is connected with described rotational chuck.
7. according to claim 1ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: described rotational chuck is scroll chuck.
8. according to claim 1ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: described rolling mechanism comprises milled head, pressure head connecting rod, inner sleeve, front sleeve, pressure sensor and rear end cap, milled head is connected on pressure head connecting rod, pressure head connecting rod lock onto in inner sleeve, front sleeve is socketed in outside inner sleeve, after pressure sensor is connected to pressure head connecting rod and with rear end cap, is connected.
9. according to claim 8ly a kind ofly realize the densified device of powder metallurgy sintered material surface by roll extrusion, it is characterized in that: described rolling mechanism also comprises rear sleeve, first piston, the second piston, the 3rd piston and rigid connecting are taken over, rear sleeve is fixedly connected with front sleeve, rear end cap is fixedly connected on the rear end of rear sleeve, first piston is arranged in front sleeve and a side is fixedly connected with inner sleeve and/or pressure head connecting rod, the second piston and the 3rd piston are arranged in rear sleeve, first piston opposite side is connected with the second piston, the second piston is taken over the 3rd piston and is connected by rigid connecting, described pressure sensor contacts with the 3rd piston.
10. realize the densified method of powder metallurgy sintered material surface for one kind, it is characterized in that right to use requires realizing the densified device of powder metallurgy sintered material surface by roll extrusion and carry out roll extrusion described in 2, what two rolling mechanisms were relative carries out roll extrusion at powder metallurgy sintered material surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410068695.7A CN103817331B (en) | 2014-02-27 | 2014-02-27 | The device and method of powder metallurgy sintered material surface densification is realized by rolling |
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| CN201410068695.7A CN103817331B (en) | 2014-02-27 | 2014-02-27 | The device and method of powder metallurgy sintered material surface densification is realized by rolling |
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| CN103817331A true CN103817331A (en) | 2014-05-28 |
| CN103817331B CN103817331B (en) | 2016-09-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586478A (en) * | 2016-02-25 | 2016-05-18 | 上海大学 | Device for removing powder added material production stress in real time by rolling method |
| CN107199341A (en) * | 2016-03-17 | 2017-09-26 | 通用汽车环球科技运作有限责任公司 | Method And System For Surface Densification |
| CN108500277A (en) * | 2018-03-28 | 2018-09-07 | 上海汽车粉末冶金有限公司 | A kind of preparation method of powder metallurgy surface densified parts |
| CN112692288A (en) * | 2020-12-15 | 2021-04-23 | 扬州保来得科技实业有限公司 | Device and method for improving surface support rate of powder metallurgy product |
| CN113020600A (en) * | 2021-03-09 | 2021-06-25 | 吉凯恩(丹阳)工业有限公司 | Powder metallurgy gear rolling densification device |
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| CN102179515A (en) * | 2011-05-19 | 2011-09-14 | 华南理工大学 | Method for increasing density of stainless steel powder metallurgy part |
| CN203711849U (en) * | 2014-02-27 | 2014-07-16 | 华南理工大学 | Device for densifying surface of powder metallurgy sintering material through rolling |
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| EP1052043A2 (en) * | 1999-05-10 | 2000-11-15 | Daido Tokushuko Kabushiki Kaisha | Silicon steel plate and method for producing the same |
| CN201519765U (en) * | 2009-10-30 | 2010-07-07 | 华南理工大学 | Powder metallurgy high-speed pressing press based on mechanical spring energy storage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586478A (en) * | 2016-02-25 | 2016-05-18 | 上海大学 | Device for removing powder added material production stress in real time by rolling method |
| CN107199341A (en) * | 2016-03-17 | 2017-09-26 | 通用汽车环球科技运作有限责任公司 | Method And System For Surface Densification |
| CN108500277A (en) * | 2018-03-28 | 2018-09-07 | 上海汽车粉末冶金有限公司 | A kind of preparation method of powder metallurgy surface densified parts |
| CN112692288A (en) * | 2020-12-15 | 2021-04-23 | 扬州保来得科技实业有限公司 | Device and method for improving surface support rate of powder metallurgy product |
| CN113020600A (en) * | 2021-03-09 | 2021-06-25 | 吉凯恩(丹阳)工业有限公司 | Powder metallurgy gear rolling densification device |
| CN113020600B (en) * | 2021-03-09 | 2023-01-10 | 吉凯恩(丹阳)工业有限公司 | Powder metallurgy gear rolling densification device |
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| CN103817331B (en) | 2016-09-21 |
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