CN116900314B - Metal powder vacuum sintering furnace - Google Patents
Metal powder vacuum sintering furnace Download PDFInfo
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- CN116900314B CN116900314B CN202311159710.4A CN202311159710A CN116900314B CN 116900314 B CN116900314 B CN 116900314B CN 202311159710 A CN202311159710 A CN 202311159710A CN 116900314 B CN116900314 B CN 116900314B
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 42
- 238000005245 sintering Methods 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 title claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 230000033001 locomotion Effects 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000010405 clearance mechanism Effects 0.000 claims description 4
- 239000000956 alloy Substances 0.000 abstract description 13
- 229910045601 alloy Inorganic materials 0.000 abstract description 13
- 238000004140 cleaning Methods 0.000 abstract description 10
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000001993 wax Substances 0.000 description 41
- 239000012188 paraffin wax Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 24
- 230000008569 process Effects 0.000 description 21
- 239000000203 mixture Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 239000000314 lubricant Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004018 waxing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of alloy production, in particular to a metal powder vacuum sintering furnace, which comprises a furnace body, wherein a wax removing pipe is arranged at the bottom of the furnace body, a cleaning mechanism is arranged in the wax removing pipe, the cleaning mechanism comprises a circular first ring piece, a plurality of cutter heads are hinged to the outer wall of the first ring piece, the cutter heads are slidably matched in the wax removing pipe, a plurality of compression springs are fixedly connected to the outer wall of the first ring piece in a radial manner, one ends of the compression springs are abutted against the cutter heads, a cutter head for cleaning residual wax in a pipeline is arranged in the wax removing pipe of the furnace body, when the cutter heads clean the wax film layer, the cutter heads slide tightly against the inner wall of the pipeline through the cutter heads, the cutter heads scrape the wax film layer, and a wear-resistant lubricating layer is arranged on the cutter back abutted against the inner wall of the pipeline, so that friction heat between the inner wall of the pipeline and the cutter back is greatly reduced, and the wax film layer is prevented from sublimating into a gas state and escaping after being heated.
Description
Technical Field
The invention relates to the technical field of alloy production, in particular to a metal powder vacuum sintering furnace.
Background
In the sintering production of hard alloy, most manufacturers adopt raw materials such as cobalt powder, tungsten carbide powder and other alloy powder, mix and wet grind the raw materials by adding paraffin and other lubricants, squeeze or press the raw materials to form the hard alloy, and then sinter the hard alloy into hard alloy products in a sintering furnace. Because the price of the recovered hard alloy is cheaper than that of the original raw material, and the resources are rich, many manufacturers carry out zinc melting through the recovered hard alloy, then powder preparation, lubricant mixing and wet grinding are carried out, and the preparation of the hard alloy is carried out by adopting the mode of mixing the returned sintered materials as the raw materials.
Compared with the primary material, when the cemented carbide is sintered in a material returning mode, the recovered cemented carbide is crushed or melted zinc as one step. The zinc melting process is a process of melting alloy, and simultaneously brings a large amount of zinc into alloy powder, and when the alloy powder is wet-milled, besides adding a lubricant such as paraffin and a volatile agent, part of plasticizer is often added during production to improve the shaping capability in order to increase the bonding fastness of the backfire powder. The lubricant composition of the green stock and the regrind is compared, wherein the regrind lubricant is added with a great amount of zinc and plasticizer, and paraffin and the like, so that the lubricant removed in the sintering process is actually a multicomponent mixture containing inorganic matters and organic matters, the mixture is a waxy solid at room temperature, and the mixture is similar to a paste in a molten state and has extremely poor fluidity. The wax capturing device used by the traditional vacuum sintering equipment is mostly connected with a sintering furnace through a wax removal pipeline, and in the raw material sintering process, the wax removal pipeline has a good collection effect on gaseous wax generated in the furnace. For the mixture produced by the back firing, as the mixture contains various inorganic matters and organic matters, the physical characteristics of the mixture are complex, and part of the mixture may be always in a solid state or a molten state in the firing process, so that the part cannot be pumped out of a furnace body by a vacuum system of a vacuum sintering furnace, and can only be collected at a wax discharge port at the bottom of the furnace body under the action of gravity and enter the interior of a wax discharge pipeline, and is adhered to the inner wall of the wax discharge pipeline, and after the furnace body is cooled down, metal particles, paraffin and other components are solidified into impurities with higher strength on the inner wall of the pipeline, so that the interior of the wax discharge pipeline is blocked.
Disclosure of Invention
The invention aims to solve the defect that a paraffin removal pipeline is easy to block in the prior art, and provides a metal powder vacuum sintering furnace.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a metal powder vacuum sintering stove, includes the furnace body, the paraffin removal pipe is installed to the furnace body bottom, be equipped with clearance mechanism in the paraffin removal pipe, clearance mechanism includes annular first ring spare, it has a plurality of tool bits to articulate on the first ring spare outer wall, tool bit slidable cooperation is in the paraffin removal pipe, radial rigid coupling has a plurality of compression springs on the first ring spare outer wall, compression spring one end supports and leans on the tool bit.
Preferably, the bottom of the first ring member is provided with an axial reciprocating structure to drive the tool bit to do linear reciprocating motion along the axial direction of the paraffin removal pipe, the axial reciprocating structure comprises a circular second ring member and a circular annular groove, the annular groove is fixedly connected to the bottom surface of the first ring member, a plurality of rotating shafts are radially and rotatably arranged on the second ring member, one end of each rotating shaft is rotatably arranged on a connecting plate, a short shaft is rotatably arranged on the connecting plate, and the short shaft is slidably matched in the annular groove.
Preferably, the connecting plate is provided with a rotating structure to drive the annular groove to rotate, the rotating structure comprises a first ring gear, a spring, a one-way bearing and a second ring gear, the first ring gear is sleeved on a rotating shaft, the first ring gear is rotatably arranged on the connecting plate, the spring is positioned inside the first ring gear, one end of the spring is fixedly connected on the rotating shaft, the other end of the spring is fixedly connected on the inner wall of the first ring gear, the one-way bearing is arranged on a short shaft, the second ring gear is arranged on the one-way bearing, an end face gear is fixedly connected in the annular groove, the second ring gear is matched with the end face gear, a driven gear is fixedly connected on the short shaft, and the driven gear is matched with the first ring gear.
Preferably, the connecting plate is provided with a braking structure to control the rotation of the first ring gear, the braking structure comprises a first permanent magnet, a second permanent magnet and a return spring, the first permanent magnet is fixedly connected on the rotating shaft, a blind hole is formed in the connecting plate, the second permanent magnet is slidably matched in the blind hole, the return spring is fixed in the blind hole, one side of the second permanent magnet is fixedly connected with a sliding rod, the other side of the second permanent magnet is fixedly connected on the return spring, a through hole is formed in the first ring gear, and the sliding rod is slidably matched in the through hole.
Preferably, a driving structure is arranged below the second ring member to drive the second ring member to axially move in the paraffin removal pipe, the driving structure comprises a base, a first memory metal wire and a vortex-shaped second memory metal wire, the base is fixedly connected in the paraffin removal pipe, one end of the first memory metal wire is fixedly connected on the second ring member, the other end of the first memory metal wire is fixedly connected on the base, one end of the second memory metal wire is wound on the rotating shaft, and the other end of the second memory metal wire is fixedly connected on the base.
The metal powder vacuum sintering furnace provided by the invention has the beneficial effects that: according to the vacuum sintering furnace provided by the invention, the tool bit for cleaning the residual wax in the pipeline is arranged in the wax removing pipe of the furnace body, when the tool bit cleans the wax film layer, the tool bit slides closely to the inner wall of the pipeline to scrape the wax film layer, the tool back, which is abutted against the inner wall of the pipeline, of the tool bit is provided with the wear-resistant lubricating layer, so that the friction heat between the inner wall of the pipeline and the tool back is greatly reduced, and the wax film layer is prevented from sublimating into a gaseous state again and dissipating after being heated; when the inside higher wax particulate matter of intensity that exists of paraffin removal pipe, the tool bit can rotate, rotates the cutting to wax particulate matter to prevent that the tool bit from being obstructed and stop work.
Drawings
Fig. 1 is a sectional view of a vacuum sintering furnace for metal powder according to the present invention.
Fig. 2 is an enlarged view of a metal powder vacuum sintering furnace shown in fig. 1 at C according to the present invention.
Fig. 3 is a schematic structural view of a cleaning mechanism of a metal powder vacuum sintering furnace according to the present invention.
Fig. 4 is a schematic structural diagram of a base and a second ring of a metal powder vacuum sintering furnace according to the present invention.
Fig. 5 is a schematic structural diagram of a connecting plate of a metal powder vacuum sintering furnace according to the present invention.
Fig. 6 is a schematic diagram of a connecting plate of a metal powder vacuum sintering furnace according to the second embodiment of the present invention.
Fig. 7 is a front view of a connecting plate of a metal powder vacuum sintering furnace according to the present invention.
FIG. 8 is a sectional view in the direction D-D of FIG. 7 of a vacuum sintering furnace for metal powder according to the present invention.
Fig. 9 is an enlarged view of a metal powder vacuum sintering furnace of fig. 8 according to the present invention.
Fig. 10 is a schematic view of the structure of the bottom of the first ring member of the metal powder vacuum sintering furnace according to the present invention.
Fig. 11 is an enlarged view of a metal powder vacuum sintering furnace according to the present invention at B in fig. 10.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1-2, a metal powder vacuum sintering furnace is designed, comprising a furnace body a, wherein a paraffin removal pipe b is arranged at the bottom of the furnace body a, a cleaning mechanism is arranged in the paraffin removal pipe b, the cleaning mechanism comprises a circular first ring piece 19, a plurality of cutter heads 20 are hinged on the outer wall of the first ring piece 19, the cutter heads 20 are slidably matched in the paraffin removal pipe b, a plurality of compression springs 21 are fixedly connected on the outer wall of the first ring piece 19 in the radial direction, one ends of the compression springs 21 are abutted against the cutter heads 20, and a wear-resistant lubricating layer is coated on the back of a cutter where the cutter heads 20 are contacted with the paraffin removal pipe b.
When cleaning the waxy film layer attached to the inner wall of the paraffin removal pipe b, the first ring piece 19 is driven to move from bottom to top in the paraffin removal pipe b, the first ring piece 19 can drive the cutter head 20 to move upwards in the upward moving process, and the cutter head 20 can clean the waxy film layer attached to the inner wall of the paraffin removal pipe b in the upward moving process.
Because tool bit 20 articulates on first ring 19 outer wall, under compression spring 21's elasticity effect, tool bit 20 is deflected with the pin joint as the centre of a circle for tool bit 20's blade is tightly supported on wax removal pipe b inner wall, ensures that tool bit 20 moves up the in-process and can strike off wax film layer that attaches on the wax removal pipe b inner wall.
Example 2
As shown in fig. 4-11, the bottom of the first ring member 19 is provided with an axial reciprocating structure to drive the tool bit 20 to do linear reciprocating motion along the axial direction of the paraffin removal pipe b, the axial reciprocating structure comprises an annular second ring member 3 and an annular groove 17, the annular groove 17 is fixedly connected to the bottom surface of the first ring member 19, a plurality of rotating shafts 4 are radially and rotatably arranged on the second ring member 3, one end of each rotating shaft 4 is rotatably arranged on the connecting plate 5, a short shaft 13 is rotatably arranged on the connecting plate 5, and the short shaft 13 is slidably matched in the annular groove 17.
The rotary shaft 4 is driven to rotate in the process of upward movement of the first ring piece 19, the rotary shaft 4 drives the connecting plate 5 to rotate, the short shaft 13 is driven to revolve around the rotary shaft 4 as an axis when the connecting plate 5 rotates, the short shaft 13 and the annular groove 17 are in sliding fit, the annular groove 17 is driven to do linear reciprocating motion in the paraffin removal pipe b when the short shaft 13 revolves, the annular groove 17 drives the first ring piece 19 to synchronously move, the cutter head 20 abuts against the inner wall of the paraffin removal pipe b to do small-amplitude reciprocating motion along the axial direction of a pipeline under the driving of the first ring piece 19, and the cutter head 20 can do work on the inner wall of the paraffin removal pipe b for multiple times in the reciprocating process, so that the cutter head 20 can clear the inner wall part of the pipe for multiple times.
Example 3
As shown in fig. 5-8 and fig. 10-11, a rotating structure is arranged on the connecting plate 5 to drive the annular groove 17 to rotate, the rotating structure comprises a first ring gear 8, a spring 9, a one-way bearing 15 and a second ring gear 16, the first ring gear 8 is sleeved on the rotating shaft 4, the first ring gear 8 is rotatably arranged on the connecting plate 5, the spring 9 is positioned in the first ring gear 8, one end of the spring 9 is fixedly connected on the rotating shaft 4, the other end is fixedly connected on the inner wall of the first ring gear 8, the one-way bearing 15 is arranged on the short shaft 13, the second ring gear 16 is arranged on the one-way bearing 15, the end face gear 18 is fixedly connected in the annular groove 17, the second ring gear 16 is matched with the end face gear 18, the short shaft 13 is fixedly connected with a driven gear 14, and the driven gear 14 is matched with the first ring gear 8.
The rotating shaft 4 can drive the first ring gear 8 to rotate through the spring 9 when rotating, the first ring gear 8 rotates to drive the driven gear 14 to rotate, the driven gear 14 rotates to drive the short shaft 13 to rotate, the short shaft 13 drives the second ring gear 16 to rotate through the one-way bearing 15, the second ring gear 16 is meshed with the face gear 18, the second ring gear 16 drives the face gear 18 to rotate, the face gear 18 rotates to drive the annular groove 17 to rotate, the annular groove 17 drives the first ring piece 19 to rotate, the first ring piece 19 rotates to drive the cutter head 20 to rotate, and the cutter head 20 can cut and clear waxy particles with larger resistance attached to the inner wall of the paraffin removal pipe b in the rotating process.
Since the short shaft 13 will drive the second ring gear 16 to revolve and the second ring gear 16 is meshed with the face gear 18 when revolving, the second ring gear 16 will rotate when revolving, and the second ring gear 16 is free between the second ring gear 16 and the short shaft 13 when rotating by utilizing the unidirectional transmission characteristic of the unidirectional bearing 15, at this time, the second ring gear 16 will not rotate to drive the short shaft 13 to rotate.
Example 4
As shown in fig. 8-9, the connecting plate 5 is provided with a braking structure to control the rotation of the first ring gear 8, the braking structure comprises a first permanent magnet 7, a second permanent magnet 10 and a return spring 11, the first permanent magnet 7 is fixedly connected to the rotating shaft 4, the connecting plate 5 is provided with a blind hole 501, the second permanent magnet 10 is slidably matched in the blind hole 501, the return spring 11 is fixed in the blind hole 501, one side of the second permanent magnet 10 is fixedly connected with a slide bar 12, the other side is fixedly connected to the return spring 11, the first ring gear 8 is provided with a through hole 801, and the slide bar 12 is slidably matched in the through hole 801.
In the initial state, the slide bar 12 is positioned in the through hole 801 to limit the first ring gear 8, and because the force required by deformation of the spring 9 is larger than the sum of the gravity borne by the connecting plate 5, in the state, the torsion provided by rotation of the rotating shaft 4 only drives the connecting plate 5 to rotate and does not deform the spring 9, so that the short shaft 13 revolves;
if wax particles with larger resistance are encountered during the upward movement of the cutter head 20, the force applied by the connecting plate 5 is increased by the wax particles based on the reverse acting force of the cutter head 20, the torsion provided by the rotating shaft 4 is also increased, and at a certain moment, the torsion provided by the rotating shaft 4 is larger than the force required by deformation of the spring 9, at this moment, the rotating shaft 4 rotates relative to the connecting plate 5 and charges the spring 9.
The rotating shaft 4 rotates relative to the connecting plate 5 to drive the first permanent magnet 7 to rotate, the first permanent magnet 7 is overlapped with the blind hole 501 at a certain moment in the rotating process, after the first permanent magnet 7 is overlapped with the blind hole 501, the second permanent magnet 10 slides in the blind hole 501 due to the magnetic attraction of the first permanent magnet 7 to the second permanent magnet 10, the second permanent magnet 10 drives the sliding rod 12 to be pulled out of the through hole 801 in the sliding process, the sliding rod 12 does not limit the first ring gear 8 after being pulled out of the through hole 801, at the moment, the spring 9 after being charged converts the elastic potential energy of the spring into kinetic energy required by the rotation of the first ring gear 8, the first ring gear 8 rotates, and at the moment, the first ring gear 8 drives the driven gear 14 to rotate, and the driven gear 14 drives the short shaft 13 to rotate.
During the rotation of the first ring gear 8 driven by the spring 9: because the rotation of the rotating shaft 4, the first permanent magnet 7 is always in a rotating state, in the rotating process of the first ring gear 8, the first permanent magnet 7 is not overlapped with the blind hole 501 due to the rotation of the first permanent magnet 7, after the first permanent magnet 7 and the blind hole 501 are not overlapped, the second permanent magnet 10 resets under the elastic force of the reset spring 11, and when the through hole 801 on the first ring gear 8 is overlapped with the blind hole 501 again, the slide rod 12 is reinserted into the through hole 801 to limit the first ring gear 8.
Example 5
As shown in fig. 3-4, a driving structure is arranged below the second ring member 3 to drive the second ring member 3 to axially move in the paraffin removal tube b, the driving structure comprises a base 1, a first memory wire 2 and a vortex-shaped second memory wire 6, the base 1 is fixedly connected in the paraffin removal tube b, one end of the first memory wire 2 is fixedly connected on the second ring member 3, the other end is fixedly connected on the base 1, one end of the second memory wire 6 is wound on the rotating shaft 4, and the other end is fixedly connected on the base 1.
For the first memory wire 2: it is contracted into a spiral shape at high temperature and is extended into a straight line shape at low temperature;
for the second memory wire 6: it contracts into a vortex shape at high temperature and stretches into a straight line shape at low temperature;
when the vacuum sintering furnace works, a large amount of heat is generated in the furnace body a, under the action of high temperature, gaseous wax enters the wax removing pipe b, so that the temperature in the wax removing pipe b is increased, and after the temperature is increased, the first memory metal wire 2 is contracted, the second memory metal wire 6 is contracted, so that the cutter head 20 is positioned at the bottom of the wax removing pipe b;
after the vacuum sintering furnace is completed, the furnace body a is cooled, the temperature in the paraffin removal pipe b is reduced, the residual wax in the paraffin removal pipe b is condensed on the inner wall of the pipeline under the influence of low temperature, and the first memory metal wire 2 and the second memory metal wire 6 are stretched into straight lines in the low temperature state.
During the extension of the first memory wire 2, the first memory wire 2 will drive the second ring member 3 up from the bottom of the de-waxing tube b to the top of the de-waxing tube b.
During the stretching of the second memory wire 6, the second memory wire 6 will drive the rotation shaft 4 to rotate.
Working principle and working procedure:
when the furnace body a works, the first memory metal wire 2 and the second memory metal wire 6 are in a contracted state, and at the moment, the cutter head 20 is positioned at the bottom of the paraffin removal pipe b.
After the work of the furnace body a is completed, the temperature in the paraffin removal pipe b is reduced, and after the temperature in the paraffin removal pipe b is reduced, the first memory metal wire 2 and the second memory metal wire 6 start to stretch.
The first memory wire 2 will drive the second ring 3 upwards during extension and the second memory wire 6 will drive the spindle 4 to rotate during extension.
In the initial state, the slide bar 12 is located in the through hole 801 to limit the first ring gear 8, and because the force required by deformation of the spring 9 is greater than the sum of the weights borne by the connecting plate 5, in this state, the torque force provided by rotation of the rotating shaft 4 only drives the connecting plate 5 to rotate, but does not deform the spring 9.
In the process that the first memory metal wire 2 drives the second ring member 3 to move upwards, the second ring member 3 drives the first ring member 19 to move from bottom to top in the paraffin removal pipe b, the first ring member 19 can drive the cutter head 20 to move upwards in the process of moving upwards, and the cutter head 20 can clean a waxy film layer attached to the inner wall of the paraffin removal pipe b in the process of moving upwards.
Because tool bit 20 articulates on first ring 19 outer wall, under compression spring 21's elasticity effect, tool bit 20 is deflected as the centre of a circle with the pin joint for tool bit 20's blade is tightly supported on wax removal pipe b inner wall, ensures that tool bit 20 moves up the in-process and can strike off the waxy film layer that adheres to on the wax removal pipe b inner wall, improves the clearance quality.
In the process of upward movement of the first ring piece 19, the rotating shaft 4 drives the connecting plate 5 to rotate, the connecting plate 5 drives the short shaft 13 to revolve around the rotating shaft 4 as a shaft, and because the short shaft 13 and the annular groove 17 are in sliding fit, when the short shaft 13 revolves, the annular groove 17 is driven to do linear reciprocating motion in the paraffin removal pipe b, the annular groove 17 drives the first ring piece 19 to synchronously move, the cutter head 20 abuts against the inner wall of the paraffin removal pipe b to do small-amplitude reciprocating motion along the axial direction of a pipeline under the driving of the first ring piece 19, and the cutter head 20 can do work on the inner wall of the paraffin removal pipe b for a plurality of times in the reciprocating process, so that the cutter head 20 can repeatedly clean the inner wall part of the pipe, and the cleaning quality is further improved.
If wax particles with larger resistance are encountered during the upward movement of the cutter head 20, the force applied by the connecting plate 5 is increased by the wax particles based on the reverse acting force of the cutter head 20, the torsion provided by the rotating shaft 4 is also increased, and at a certain moment, the torsion provided by the rotating shaft 4 is larger than the force required by deformation of the spring 9, at this moment, the rotating shaft 4 rotates relative to the connecting plate 5 and charges the spring 9.
The rotation shaft 4 rotates relative to the connecting plate 5 and drives the first permanent magnet 7 to rotate, the first permanent magnet 7 is overlapped with the blind hole 501 at a certain moment in the rotation process, after the first permanent magnet 7 is overlapped with the blind hole 501, the second permanent magnet 10 slides in the blind hole 501 due to the magnetic attraction of the first permanent magnet 7 to the second permanent magnet 10, the second permanent magnet 10 drives the slide rod 12 to be pulled out of the through hole 801 in the sliding process, the slide rod 12 does not limit the first ring gear 8 after being pulled out of the through hole 801, at the moment, the spring 9 after being charged converts the elastic potential energy of the spring into kinetic energy required by the rotation of the first ring gear 8, the first ring gear 8 rotates, and the first ring gear 8 drives the driven gear 14 to rotate.
The first ring gear 8 drives the driven gear 14 to rotate, the driven gear 14 rotates to drive the short shaft 13 to rotate, the short shaft 13 drives the second ring gear 16 to rotate through the one-way bearing 15, the second ring gear 16 is meshed with the face gear 18, the second ring gear 16 drives the face gear 18 to rotate, the face gear 18 rotates to drive the annular groove 17 to rotate, the annular groove 17 drives the first ring piece 19 to rotate, the first ring piece 19 rotates to drive the cutter head 20 to rotate, and the cutter head 20 can cut and clean waxy particles with larger resistance attached to the inner wall of the paraffin removal pipe b in the rotating process.
Since the short shaft 13 will drive the second ring gear 16 to revolve and the second ring gear 16 is meshed with the face gear 18 when revolving, the second ring gear 16 will rotate when revolving, and the second ring gear 16 is free between the second ring gear 16 and the short shaft 13 when rotating by utilizing the unidirectional transmission characteristic of the unidirectional bearing 15, at this time, the second ring gear 16 will not rotate to drive the short shaft 13 to rotate.
During the rotation of the first ring gear 8 driven by the spring 9: because the rotation of the rotating shaft 4, the first permanent magnet 7 is always in a rotating state, in the rotating process of the first ring gear 8, the first permanent magnet 7 is not overlapped with the blind hole 501 due to the rotation of the first permanent magnet 7, after the first permanent magnet 7 is not overlapped with the blind hole 501, the second permanent magnet 10 is reset under the elastic force of the reset spring 11, and when the through hole 801 on the first ring gear 8 is overlapped with the blind hole 501 again, the sliding rod 12 is reinserted into the through hole 801 to limit the first ring gear 8 until the cutter head 20 encounters wax particles with higher strength again.
According to the vacuum sintering furnace provided by the invention, aiming at the problem that gaseous wax dissipated into the wax removing pipe b condenses into a wax film layer on the inner wall of the pipe after cooling, the cutter head 20 for cleaning residual wax in the pipeline is arranged in the wax removing pipe b of the furnace body a, when the wax film layer is cleaned, the cutter head 20 slides against the inner wall of the pipeline to scrape the wax film layer, the cutter back abutted by the cutter head 20 and the inner wall of the pipeline is provided with the wear-resistant lubricating layer, so that friction heat between the inner wall of the pipeline and the cutter back is greatly reduced, and the wax film layer is prevented from sublimating into a gaseous state again after being heated and dissipated.
When the wax removing pipe b is internally provided with the wax particles with higher strength, the cutter head 20 rotates to rotationally cut the wax particles, so that the cutter head 20 is prevented from being blocked to stop working.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (2)
1. The utility model provides a metal powder vacuum sintering furnace, includes furnace body (a), wax removal pipe (b) is installed to furnace body (a) bottom, its characterized in that, be equipped with clearance mechanism in the wax removal pipe (b), clearance mechanism includes annular first ring spare (19), articulated on first ring spare (19) outer wall have a plurality of tool bits (20), tool bit (20) slidable cooperation is in wax removal pipe (b), radial rigid coupling has a plurality of compression springs (21) on first ring spare (19) outer wall, compression spring (21) one end supports and leans on tool bit (20);
the bottom of the first ring piece (19) is provided with an axial reciprocating structure to drive the tool bit (20) to do linear reciprocating motion along the axial direction of the wax removing pipe (b), the axial reciprocating structure comprises a circular second ring piece (3) and a circular annular groove (17), the annular groove (17) is fixedly connected to the bottom surface of the first ring piece (19), a plurality of rotating shafts (4) are radially and rotatably arranged on the second ring piece (3), one end of each rotating shaft (4) is rotatably arranged on the connecting plate (5), a short shaft (13) is rotatably arranged on the connecting plate (5), and the short shaft (13) is slidably matched in the annular groove (17);
the connecting plate (5) is provided with a rotating structure for driving the annular groove (17) to rotate, the rotating structure comprises a first annular gear (8), a spring (9), a one-way bearing (15) and a second annular gear (16), the first annular gear (8) is sleeved on the rotating shaft (4), the first annular gear (8) is rotatably arranged on the connecting plate (5), the spring (9) is positioned in the first annular gear (8), one end of the spring (9) is fixedly connected on the rotating shaft (4), the other end of the spring is fixedly connected on the inner wall of the first annular gear (8), the one-way bearing (15) is arranged on the short shaft (13), the second annular gear (16) is arranged on the one-way bearing (15), an end face gear (18) is fixedly connected in the annular groove (17), a driven gear (14) is fixedly connected on the short shaft (13), and the driven gear (14) is matched with the first annular gear (8);
be equipped with braking structure on link board (5) in order to control the rotation of first ring gear (8), braking structure includes first permanent magnet (7), second permanent magnet (10) and reset spring (11), first permanent magnet (7) rigid coupling is on pivot (4), link and seted up blind hole (501) on board (5), second permanent magnet (10) slidable cooperation is in blind hole (501), reset spring (11) are fixed in blind hole (501), second permanent magnet (10) one side rigid coupling has slide bar (12), and the opposite side rigid coupling is on reset spring (11), through-hole (801) have been seted up on first ring gear (8), slide bar (12) slidable cooperation is in through-hole (801).
2. The metal powder vacuum sintering furnace according to claim 1, wherein a driving structure is arranged below the second ring member (3) to drive the second ring member (3) to axially move in the wax removing tube (b), the driving structure comprises a base (1), a first memory metal wire (2) and a vortex-shaped second memory metal wire (6), the base (1) is fixedly connected in the wax removing tube (b), one end of the first memory metal wire (2) is fixedly connected on the second ring member (3), the other end of the first memory metal wire is fixedly connected on the base (1), one end of the second memory metal wire (6) is wound on the rotating shaft (4), and the other end of the second memory metal wire is fixedly connected on the base (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311159710.4A CN116900314B (en) | 2023-09-11 | 2023-09-11 | Metal powder vacuum sintering furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311159710.4A CN116900314B (en) | 2023-09-11 | 2023-09-11 | Metal powder vacuum sintering furnace |
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| CN116900314B true CN116900314B (en) | 2023-12-19 |
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Citations (5)
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|---|---|---|---|---|
| KR20020050323A (en) * | 2000-12-21 | 2002-06-27 | 이구택 | Device for eliminating adhered materials of shaft kiln charging feeder |
| RU2014152973A (en) * | 2014-12-25 | 2016-07-20 | Денис Юрьевич Бондаренко | METHOD FOR APPLYING FILM COATING ON COMPLEX SURFACE |
| CN111451509A (en) * | 2020-04-29 | 2020-07-28 | 江西耀升钨业股份有限公司 | Ultra-fine grain hard alloy bar and preparation equipment thereof |
| CN113048781A (en) * | 2021-03-09 | 2021-06-29 | 王建生 | Vertical sintering furnace convenient to clean |
| CN115593886A (en) * | 2022-12-14 | 2023-01-13 | 天津市生态环境科学研究院（天津市环境规划院、天津市低碳发展研究中心）（Cn） | Powder metallurgy sintering furnace with self-cleaning function |
-
2023
- 2023-09-11 CN CN202311159710.4A patent/CN116900314B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020050323A (en) * | 2000-12-21 | 2002-06-27 | 이구택 | Device for eliminating adhered materials of shaft kiln charging feeder |
| RU2014152973A (en) * | 2014-12-25 | 2016-07-20 | Денис Юрьевич Бондаренко | METHOD FOR APPLYING FILM COATING ON COMPLEX SURFACE |
| CN111451509A (en) * | 2020-04-29 | 2020-07-28 | 江西耀升钨业股份有限公司 | Ultra-fine grain hard alloy bar and preparation equipment thereof |
| CN113048781A (en) * | 2021-03-09 | 2021-06-29 | 王建生 | Vertical sintering furnace convenient to clean |
| CN115593886A (en) * | 2022-12-14 | 2023-01-13 | 天津市生态环境科学研究院（天津市环境规划院、天津市低碳发展研究中心）（Cn） | Powder metallurgy sintering furnace with self-cleaning function |
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| CN116900314A (en) | 2023-10-20 |
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