CN113319281B - Powder metallurgy process of high-heat-dissipation type shaft sleeve - Google Patents
Powder metallurgy process of high-heat-dissipation type shaft sleeve Download PDFInfo
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- CN113319281B CN113319281B CN202110466568.2A CN202110466568A CN113319281B CN 113319281 B CN113319281 B CN 113319281B CN 202110466568 A CN202110466568 A CN 202110466568A CN 113319281 B CN113319281 B CN 113319281B
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- 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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- 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
- B22F3/02—Compacting only
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- 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
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
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- 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
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
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- 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
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a powder metallurgy process of a high heat-dissipation type shaft sleeve, which belongs to the technical field of powder metallurgy, and can integrally form a shaft sleeve with two sides fixedly connected with a refrigeration cooling sleeve, a fixed heat conduction rope in the refrigeration cooling sleeve can play a role in connection and heat transfer, heat in the shaft sleeve can be led into refrigeration water, meanwhile, an extrusion ball elastic bag can be triggered to expand so that a refrigeration ball is extruded into the refrigeration water, a refrigeration ball made of saltpeter can absorb a large amount of heat when dissolved in the water, so that a refrigeration cooling effect is provided, the heat dissipation efficiency of the shaft sleeve can be greatly improved, the abrasion of the shaft sleeve is effectively reduced, the service life of the shaft sleeve is further improved, the refrigeration effect can be further improved by directly acting on the joint of the shaft and the shaft sleeve through a fixed heat conduction rope, and the refrigeration ball can be extruded only one at a time and can be supplemented, thereby improving the practicability.
Description
Technical Field
The invention relates to the technical field of powder metallurgy, in particular to a powder metallurgy process of a high-heat-dissipation type shaft sleeve.
Background
Powder metallurgy is a process technique for producing metal powders or producing metal materials, composite materials, and various types of articles from metal powders (or a mixture of metal powders and non-metal powders) as a raw material by forming and sintering. The powder metallurgy method is similar to the ceramic production, and belongs to the powder sintering technology, so that a series of new powder metallurgy technology can be used for preparing ceramic materials. Because of the advantages of the powder metallurgy technology, the powder metallurgy technology has become a key for solving the problem of new materials, and plays a role in the development of the new materials.
The shaft sleeve is a cylindrical mechanical part sleeved on the rotating shaft, and in the prior art, when the shaft sleeve is manufactured through a powder metallurgy process, the manufactured shaft sleeve is affected by process defects, the heat dissipation effect of the manufactured shaft sleeve is poor, high-amount heat generated by long-time friction between the shaft sleeve and the shaft cannot be timely dissipated, the shaft sleeve is in a high-temperature state for a long time, abrasion of the shaft sleeve can be increased, and the service life of the shaft sleeve is further reduced. Therefore, we propose a powder metallurgy process of a high heat dissipation type shaft sleeve.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to solve the problems in the prior art and provide a powder metallurgy process of a high heat-dissipation type shaft sleeve, which can realize a connecting and forming device used by a matching process, integrally form the shaft sleeve with two sides fixedly connected with a refrigeration and cooling sleeve, wherein a fixed heat conduction rope in the refrigeration and cooling sleeve can play a role in connection and heat transfer, heat in the shaft sleeve can be led into refrigeration water, meanwhile, an extrusion ball elastic bag can be triggered to expand so that a refrigeration ball is extruded into the refrigeration water, and a refrigeration ball made of Sal can absorb a large amount of heat when dissolved in the water, so that the effect of refrigeration and cooling is provided, the heat dissipation efficiency of the shaft sleeve can be greatly improved, the abrasion of the shaft sleeve is effectively reduced, the service life of the shaft sleeve is further prolonged, the refrigeration effect can be directly acted on the joint of the shaft and the shaft sleeve through a fixed heat conduction rope, the refrigeration ball can be extruded one at a time and can be supplemented, and the practicability is further improved.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
A powder metallurgy process of a high heat dissipation type shaft sleeve comprises the following steps:
s1, pouring raw materials: pouring a proper amount of raw material powder into an annular die cavity connected with a forming device;
s2, press forming: moving the connecting and forming device to a powder metallurgy press for pressing to obtain a blank, and simultaneously connecting and fixing the refrigeration cooling sleeve with the blank;
s3, sintering: sending the blank fixedly connected with the refrigeration cooling sleeve into a sintering furnace for sintering to obtain a semi-finished product;
s4, subsequent processing: and (3) immersing the semi-finished product in oil, finishing and deburring to obtain the high heat dissipation type shaft sleeve.
Further, the connection forming device comprises a forming die with a cavity, a forming inner cylinder is fixedly connected to the middle part of the cavity of the forming die, an annular die cavity is formed between the forming die and the forming inner cylinder, a rope pressing cylinder is fixedly connected to the inner wall of the bottom of the forming inner cylinder, a supporting spring is fixedly installed in the rope pressing cylinder, a rope pressing block matched with the supporting spring is fixedly connected to the top end of the supporting spring, the rope pressing block is in sliding connection with the supporting spring, a connecting rod is fixedly connected to the top end of the rope pressing block, and a pressed column matched with the forming inner cylinder is fixedly connected to the top end of the connecting rod.
Further, the outer wall of the forming inner cylinder is provided with a pressing plate matched with the annular die cavity in a sliding manner, the outer walls of the two sides of the pressed column are fixedly connected with a linkage rod, one end of the linkage rod, which is far away from the pressed column, is fixedly connected with the pressing plate, and after raw material powder is poured into the annular die cavity, the pressing column is pressed downwards through a pressing machine to drive the pressing plate to move downwards, so that the raw material powder is pressed, and a blank is manufactured.
Further, the storage groove has all been seted up on the inner wall of forming die both sides, be provided with refrigeration cooling external member in the storage groove, refrigeration cooling external member includes the overcoat refrigeration hemisphere, be provided with a plurality of fixed heat conduction ropes on the outer wall that the overcoat refrigeration hemisphere is close to forming inner tube one side, the intussuseption of overcoat refrigeration hemisphere is filled with refrigeration water, run through on the outer wall of overcoat refrigeration hemisphere and be provided with the ball pipe, the ball pipe intussuseption is filled with a plurality of refrigeration balls, a plurality of refrigeration balls are from top to bottom along sharp evenly distributed, be provided with crowded ball elastic capsule in the overcoat refrigeration hemisphere, one side fixedly connected with of fixed heat conduction rope props up the heat conduction silk.
Further, the one end of fixed heat conduction rope runs through the outer wall of shaping inner tube and is held between pressing rope piece and pressing rope drum, and the outer wall sliding connection of fixed heat conduction rope and shaping inner tube, the other end of fixed heat conduction rope runs through the outer wall of overcoat refrigeration hemisphere and extends and insert in the refrigeration water, fixed heat conduction rope adopts flexible heat conduction material to make, through pressing rope drum, supporting spring, pressing rope piece, connecting rod's setting, pressing rope piece, pressing rope drum to the centre gripping of fixed heat conduction rope, fixed heat conduction rope sagging when can prevent to pour into raw materials powder, make the fixed heat conduction rope that is in the annular die cavity can keep the level, and when pressing down the pressure post makes the pressure plate compress to the raw materials powder, the downward movement of pressure post can drive the pressing rope piece through the connecting rod simultaneously, make the one end of fixed heat conduction rope no longer by the centre gripping, thereby can outwards slide out to the shaping inner tube when making fixed heat conduction rope receive the suppression, and can not be pressed off, and make after the blank, can stretch out to the fixed heat conduction rope in the blank, thereby make the fixed heat conduction rope that is in the heat conduction shaft sleeve junction just can play a role in the cooling sleeve, and can be connected to the cooling sleeve to the heat transfer sleeve just, and can play a role in the cooling sleeve.
Further, the outer wall of the outer sleeve refrigerating hemisphere near one side of the forming inner cylinder is arranged to be circular arc-shaped matched with the annular mold cavity, so that the outer sleeve refrigerating hemisphere can be attached to the manufactured shaft sleeve, and the outer wall of the outer sleeve refrigerating hemisphere near one side of the forming inner cylinder is embedded with a heat conducting block, so that heat on the outer wall of the shaft sleeve can be conducted into refrigerating water by the heat conducting block, and the heat dissipation efficiency of the shaft sleeve is improved.
Further, the air is filled in the extrusion ball elastic bag, one end of the branch heat conducting wire, far away from the fixed heat conducting rope, penetrates through the outer wall of the extrusion ball elastic bag and extends into the extrusion ball elastic bag, an elastic membrane is connected to an opening on the outer wall of one side of the ball guiding pipe, an elastic ball outlet hole is formed in the middle of the elastic membrane, a branch heat conducting wire matched with the extrusion ball elastic bag is formed in the outer wall of the other side of the ball guiding pipe, the branch heat conducting wire penetrates through the hole and abuts against the cooling ball at the lowest position, the cooling ball is made of saltpeter, when the heat of the connecting part of the shaft and the shaft sleeve is led into cooling water by the fixed heat conducting rope, part of the heat can be led into the extrusion ball elastic bag, so that the air in the extrusion ball elastic bag expands, the extrusion ball elastic membrane is extruded outwards, the elastic ball outlet hole is supported greatly until the cooling ball drops into the cooling water through the elastic ball outlet hole, and only one cooling ball can be extruded each time, the cooling ball can be made of saltpeter and can be greatly absorbed by water when the cooling ball is dissolved in the water, therefore the cooling efficiency is greatly improved, the cooling efficiency is greatly can be improved, and the cooling efficiency is further improved, and the cooling life is greatly is prolonged.
Further, the top end of the ball guide pipe is provided with a sealing cover, and the refrigerating ball can be supplemented into the ball guide pipe by unscrewing the sealing cover, so that the refrigerating ball is convenient to supplement.
Further, the casting die is characterized in that a casting die rod matched with the annular die cavity is movably arranged in the casting die groove, the bottom end of the casting die rod is propped against the top end of the outer sleeve refrigerating hemisphere, when raw materials are pressed, the casting die rod can play a fixing role on the outer sleeve refrigerating hemisphere, the outer sleeve refrigerating hemisphere is inclined inwards, a sealing role can be played, and raw materials are prevented from entering the casting die groove.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) This scheme is equipped with the connection forming device that cooperation technology used, but the equal fixedly connected with refrigeration cooling external member's of integrated into one piece axle sleeve in both sides, fixed heat conduction rope in the refrigeration cooling external member not only can play a junction, can also play a heat transfer's effect, when can leading the heat in the axle sleeve to the refrigeration water, can also trigger the expansion of crowded ball elastic bag and make the refrigeration ball by the extrusion refrigeration water, the refrigeration ball that the niter was made can absorb a large amount of heat when dissolving in water, thereby provide a refrigeration cooling's effect, can improve the radiating efficiency of axle sleeve greatly, effectively reduce the wearing and tearing of axle sleeve, and then improve the life of axle sleeve, and refrigeration effect accessible fixed heat conduction rope directly acts on the junction of axle and axle sleeve, and then can further improve radiating efficiency, the refrigeration ball can only be extruded one and can be replenished at every turn, thereby the practicality is improved.
(2) Through the setting of clamp rope reel, supporting spring, clamp rope piece, the connecting rod, the clamp rope piece, the clamp rope reel is to the centre gripping of fixed heat conduction rope, fixed heat conduction rope whereabouts when can prevent to pour into raw materials powder, make the fixed heat conduction rope that is in among the annular die cavity can keep the level, and when pushing down the pressurized post and making the flitch compress the raw materials powder, the downward movement of pressurized post, can be simultaneously through connecting rod drive clamp rope piece downwardly moving, make the one end of fixed heat conduction rope no longer by the centre gripping, thereby can outwards roll-off to the shaping inner tube when making fixed heat conduction rope receive the suppression, and then make fixed heat conduction rope can not be broken, and after making the blank, can cut off the unnecessary fixed heat conduction rope that stretches out in the blank, thereby make the end of fixed heat conduction rope be in the inner wall edge of the axle sleeve that makes just, namely the junction of axle and axle sleeve, make fixed heat conduction rope not only can play a connecting action, can be fixed the cooling external member to the axle sleeve, and can play a heat transfer's effect, with the heat conduction of axle sleeve junction to water, and then realize fast heat dissipation to the axle sleeve.
(3) The outer wall of the outer sleeve refrigerating hemisphere near one side of the forming inner cylinder is arranged to be circular arc-shaped matched with the annular mold cavity, so that the outer sleeve refrigerating hemisphere can be attached to a manufactured shaft sleeve, and a heat conducting block is embedded and installed on the outer wall of the outer sleeve refrigerating hemisphere near one side of the forming inner cylinder, and can conduct heat on the outer wall of the shaft sleeve to refrigerating water, so that heat dissipation efficiency of the shaft sleeve is improved.
(4) The air is filled in the extrusion ball elastic bag, one end of the branch heat conduction wire, far away from the fixed heat conduction rope, penetrates through the outer wall of the extrusion ball elastic bag and extends into the extrusion ball elastic bag, an elastic membrane is connected to an opening on the outer wall of one side of the ball guide pipe, an elastic ball outlet hole is formed in the middle of the elastic membrane, the branch heat conduction wire matched with the extrusion ball elastic bag is formed in the outer wall of the other side of the ball guide pipe, the branch heat conduction wire penetrates through the hole and abuts against the lowest refrigerating ball, the refrigerating ball is made of Sal Nitri, when the fixed heat conduction rope guides heat at the joint of the shaft and the shaft sleeve into the refrigerating water, the branch heat conduction wire can guide part of the heat into the extrusion ball elastic bag, the air in the extrusion ball elastic bag is heated and expanded, the extrusion ball elastic membrane is expanded, the elastic ball outlet hole is supported to be large until the refrigerating ball passes through the elastic ball outlet hole and drops into the refrigerating water, only one refrigerating ball can be extruded each time, the refrigerating ball made of Sal absorbs a large amount of heat when dissolved in the water, therefore the cooling effect of a large cooling shaft sleeve is provided, the cooling effect can be greatly improved, the cooling efficiency can be greatly improved, the service life of the cooling shaft sleeve can be effectively prolonged, and the service life of the shaft sleeve can be further prolonged.
(5) The top end of the ball guide pipe is provided with a sealing cover, and the refrigerating ball can be supplemented into the ball guide pipe by unscrewing the sealing cover, so that the refrigerating ball is convenient to supplement.
(6) The inside activity of storing part inslot is provided with and annular die cavity assorted casting die pole, and the bottom of casting die pole offsets with the top of overcoat refrigeration hemisphere, when pressing the raw materials, casting die pole not only can play a fixed action to the overcoat refrigeration hemisphere, and the inside slope of overcoat refrigeration hemisphere can also play a sealed effect, prevents that the raw materials from getting into the storing part groove.
Drawings
FIG. 1 is a schematic cross-sectional view of a connection molding apparatus of the present invention;
FIG. 2 is a schematic cross-sectional view of the inner barrel of the present invention;
FIG. 3 is a schematic cross-sectional view of the refrigeration and cooling kit of the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3A according to the present invention;
FIG. 5 is a schematic top view of the jacket refrigeration hemisphere of the present invention;
FIG. 6 is a schematic cross-sectional view of a high heat dissipation type bushing made in accordance with the present invention;
fig. 7 is a process flow diagram of the present invention.
The reference numerals in the figures illustrate:
101. a forming die; 102. forming an inner cylinder; 103. an annular mold cavity; 104. rope pressing drum; 105. a support spring; 106. rope pressing blocks; 107. a connecting rod; 108. a compression column; 109. a pressing plate; 110. a linkage rod; 111. a storage tank; 112. a press bar; 201. a jacket refrigerating hemisphere; 202. fixing a heat conduction rope; 203. refrigeration water; 204. a ball guide tube; 205. a refrigeration ball; 206. an elastic film; 207. an elastic ball outlet hole; 208. extruding the balloon elastic bag; 209. supporting a heat conducting wire; 210. a through hole; 211. and a heat conducting block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
referring to fig. 1-7, a powder metallurgy process of a high heat dissipation type shaft sleeve includes the following steps:
s1, pouring raw materials: pouring a proper amount of raw material powder into an annular die cavity 103 connected with a forming device;
s2, press forming: moving the connecting and forming device to a powder metallurgy press for pressing to obtain a blank, and simultaneously connecting and fixing the refrigeration cooling sleeve with the blank;
s3, sintering: sending the blank fixedly connected with the refrigeration cooling sleeve into a sintering furnace for sintering to obtain a semi-finished product;
s4, subsequent processing: and (3) immersing the semi-finished product in oil, finishing and deburring to obtain the high heat dissipation type shaft sleeve.
Referring to fig. 1-2, the connection forming device comprises a forming die 101 provided with a cavity, a forming inner cylinder 102 is fixedly connected in the middle of the cavity of the forming die 101, an annular die cavity 103 is formed between the forming die 101 and the forming inner cylinder 102, a rope pressing cylinder 104 is fixedly connected to the inner wall of the bottom of the forming inner cylinder 102, a supporting spring 105 is fixedly installed in the rope pressing cylinder 104, a rope pressing block 106 matched with the supporting spring 105 is fixedly connected to the top end of the supporting spring 105, the rope pressing block 106 is in sliding connection with the supporting spring 105, a connecting rod 107 is fixedly connected to the top end of the rope pressing block 106, a pressed column 108 matched with the forming inner cylinder 102 is fixedly connected to the top end of the connecting rod 107, a pressing plate 109 matched with the annular die cavity 103 is sleeved on the outer wall of the forming inner cylinder 102 in a sliding mode, a linkage rod 110 is fixedly connected to the outer walls of two sides of the pressed column 108, one end of the linkage rod 110, which is far away from the pressed column 108, is fixedly connected with the pressing plate 109, after raw material powder is poured into the annular die cavity 103, the pressed column 108 can be driven to move downwards by a pressing machine, and the pressing plate 109 can be driven to move downwards by the pressing machine, so that a blank is pressed.
Referring to fig. 1, 3-4 and 6, a storage groove 111 is provided on the inner walls of two sides of the forming mold 101, a cooling set is provided in the storage groove 111, the cooling set comprises an outer cooling hemisphere 201, a plurality of fixed heat conducting ropes 202 are provided on the outer wall of one side of the outer cooling hemisphere 201 close to the forming inner cylinder 102, the outer cooling hemisphere 201 is filled with cooling water 203, a ball guide tube 204 is provided on the outer wall of the outer cooling hemisphere 201 in a penetrating way, a plurality of cooling balls 205 are filled in the ball guide tube 204, the plurality of cooling balls 205 are uniformly distributed along a straight line from top to bottom, a ball extrusion elastic bag 208 is provided in the outer cooling hemisphere 201, a supporting heat conducting wire 209 is fixedly connected to one side of the fixed heat conducting rope 202, one end of the fixed heat conducting rope 202 penetrates the outer wall of the forming inner cylinder 102 and is clamped between a rope pressing block 106 and a rope pressing cylinder 104, and the fixed heat conducting rope 202 is in sliding connection with the outer wall of the forming inner cylinder 102, the other end of the fixed heat conduction rope 202 penetrates through the outer wall of the outer sleeve refrigerating hemisphere 201 and extends to be inserted into the refrigerating water 203, the fixed heat conduction rope 202 is made of flexible heat conduction materials, through the arrangement of the rope pressing barrel 104, the supporting spring 105, the rope pressing block 106 and the connecting rod 107, the rope pressing block 106 and the rope pressing barrel 104 clamp the fixed heat conduction rope 202, the fixed heat conduction rope 202 can be prevented from sagging when raw material powder is poured into the annular die cavity 103, the fixed heat conduction rope 202 in the annular die cavity 103 can be kept horizontal, the pressure receiving column 108 is pressed downwards, when the pressure receiving column 109 presses the raw material powder, the pressure receiving column 108 moves downwards, meanwhile, the connecting rod 107 drives the rope pressing block 106 to move downwards, one end of the fixed heat conduction rope 202 is not clamped any more, so that the fixed heat conduction rope 202 can slide outwards the forming inner barrel 102 when being pressed, and the fixed heat conduction rope 202 can not be broken, after the blank is manufactured, the redundant fixed heat conducting rope 202 extending into the blank can be cut off, as shown in fig. 7, the end head of the fixed heat conducting rope 202 is just positioned at the edge of the inner wall of the manufactured shaft sleeve, namely the joint of the shaft and the shaft sleeve, so that the fixed heat conducting rope 202 can not only play a role in connection, but also can fix the refrigeration cooling sleeve on the shaft sleeve, and play a role in heat transfer, and heat at the joint of the shaft and the shaft sleeve is led into the refrigeration water 203, thereby realizing rapid heat dissipation of the shaft sleeve.
Referring to fig. 3 and 5, the outer wall of the outer cooling hemisphere 201 near the forming inner cylinder 102 is set to be arc-shaped matching with the annular mold cavity 103, so that the outer cooling hemisphere 201 can be attached to the manufactured shaft sleeve, and the outer wall of the outer cooling hemisphere 201 near the forming inner cylinder 102 is embedded with a heat conducting block 211, the heat conducting block 211 can guide the heat on the outer wall of the shaft sleeve to the cooling water 203, and therefore the heat dissipation efficiency of the shaft sleeve is improved.
Referring to fig. 3-4, air is filled in the squeeze bulb elastic bag 208, one end of the branch heat conducting wire 209, far from the fixed heat conducting rope 202, penetrates through the outer wall of the squeeze bulb elastic bag 208 and extends into the squeeze bulb elastic bag 208, an elastic membrane 206 is connected to an opening on the outer wall of one side of the squeeze bulb tube 204, an elastic ball outlet 207 is formed in the middle of the elastic membrane 206, branch heat conducting wires 209 matched with the squeeze bulb elastic bag 208 are formed on the outer wall of the other side of the squeeze bulb tube 204, the branch heat conducting wires 209 penetrate through the through holes 210 and are abutted against the cooling ball 205 at the lowest side, the cooling ball 205 is made of Sal Nitri, when the fixed heat conducting rope 202 conducts heat at the joint of the shaft and the shaft sleeve into the cooling water 203, the branch heat conducting wires 209 can conduct part of the heat into the squeeze bulb elastic bag 208, so that the air in the squeeze bulb elastic bag 208 is heated and expands, the squeeze the cooling ball 205 outwards, the cooling ball 205 is squeezed by the elastic membrane 206 until the cooling ball 205 drops into the water 203 through the elastic ball outlet 207, and the cooling ball 205 is cooled down by the cooling ball 205, and the cooling efficiency is greatly improved when the cooling water is only cooled by the shaft sleeve, and the cooling effect is greatly improved when the cooling effect is provided by the cooling water and the cooling effect is greatly when the cooling water is greatly cooled by the cooling water.
The top of ball guide 204 is provided with sealed lid, unscrews sealed lid, can supply refrigeration ball 205 in the ball guide 204 for refrigeration ball 205 is convenient for supply, and the internal activity of storage groove 111 is provided with and annular die cavity 103 assorted casting die pole 112, and the bottom of casting die pole 112 offsets with the top of overcoat refrigeration hemisphere 201, when pressing the raw materials, casting die pole 112 not only can play a fixed action to overcoat refrigeration hemisphere 201, and overcoat refrigeration hemisphere 201 inwards inclines, still can play a sealed action, prevents that the raw materials from getting into storage groove 111.
The invention is provided with the connecting forming device used in cooperation with the process, the shaft sleeve with the two sides fixedly connected with the refrigeration cooling sleeve can be integrally formed, the fixed heat conduction rope 202 in the refrigeration cooling sleeve can not only play a role in connection, but also play a role in heat transfer, the heat in the shaft sleeve can be led into the refrigeration water 203, the extrusion ball elastic bag 208 can be triggered to expand so that the refrigeration ball 205 is extruded into the refrigeration water 203, the refrigeration ball 205 made of saltpeter can absorb a large amount of heat when dissolved in the water, thereby providing a refrigeration cooling effect, greatly improving the heat dissipation efficiency of the shaft sleeve, effectively reducing the abrasion of the shaft sleeve, further improving the service life of the shaft sleeve, and the refrigeration effect can directly act on the joint of the shaft and the shaft sleeve through the fixed heat conduction rope 202, further improving the heat dissipation efficiency, and the refrigeration ball 205 can be extruded only one at a time and can be supplemented, thereby improving the practicability.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.
Claims (5)
1. A powder metallurgy process of a high heat dissipation type shaft sleeve is characterized in that: the method comprises the following steps:
s1, pouring raw materials: pouring a proper amount of raw material powder into an annular die cavity (103) connected with a forming device;
s2, press forming: moving the connecting and forming device to a powder metallurgy press for pressing to obtain a blank, and simultaneously connecting and fixing the refrigeration cooling sleeve with the blank;
s3, sintering: sending the blank fixedly connected with the refrigeration cooling sleeve into a sintering furnace for sintering to obtain a semi-finished product;
s4, subsequent processing: the semi-finished product is subjected to oil immersion, finishing and deburring treatment, and the high heat dissipation type shaft sleeve can be manufactured;
the connecting and forming device comprises a forming die (101) with a cavity, the middle part of the cavity of the forming die (101) is fixedly connected with a forming inner cylinder (102), an annular die cavity (103) is formed between the forming die (101) and the forming inner cylinder (102), a rope pressing cylinder (104) is fixedly connected to the inner wall of the bottom of the forming inner cylinder (102), a supporting spring (105) is fixedly arranged in the rope pressing cylinder (104), a rope pressing block (106) matched with the supporting spring (105) is fixedly connected to the top end of the supporting spring (105), a connecting rod (107) is fixedly connected to the top end of the rope pressing block (106), a material pressing plate (109) matched with the forming inner cylinder (102) is sleeved on the outer wall of the forming inner cylinder (102) in a sliding mode, a connecting rod (110) is fixedly connected to the outer walls of two sides of the rope pressing cylinder (108), a connecting rod (110) is connected with a material pressing groove (111) arranged on the inner wall of the connecting rod (110) far away from the material pressing cylinder (102), the cooling kit comprises an outer sleeve cooling hemisphere (201), a plurality of fixed heat conducting wires (209) are arranged on the outer wall of one side of the outer sleeve cooling hemisphere (201) close to a forming inner cylinder (102), cooling water (203) is filled in the outer sleeve cooling hemisphere (201), a ball guiding pipe (204) is arranged on the outer wall of the outer sleeve cooling hemisphere (201) in a penetrating mode, a plurality of cooling balls (205) are filled in the ball guiding pipe (204) in a penetrating mode, the plurality of cooling balls (205) are evenly distributed from top to bottom along a straight line, an extrusion ball elastic bag (208) is arranged in the outer sleeve cooling hemisphere (201), one side of each fixed heat conducting wire (202) is fixedly connected with a branch heat conducting wire (209), one end of each fixed heat conducting wire (202) penetrates through the outer wall of the forming inner cylinder (102) and is clamped between a rope pressing block (106) and a rope pressing cylinder (104), the other end of each fixed heat conducting wire (202) penetrates through the outer wall of the outer sleeve cooling hemisphere (201) and extends into water (203), and the other end of each fixed heat conducting wire (202) penetrates through the outer wall of the outer sleeve cooling hemisphere (201) and is made of flexible heat conducting wires (202).
2. The powder metallurgy process of the high heat dissipation type shaft sleeve according to claim 1, wherein: the outer wall of one side of the outer sleeve refrigerating hemisphere (201) close to the forming inner cylinder (102) is arranged in an arc shape matched with the annular die cavity (103), and the outer wall of one side of the outer sleeve refrigerating hemisphere (201) close to the forming inner cylinder (102) is embedded and provided with a heat conducting block (211).
3. The powder metallurgy process of the high heat dissipation type shaft sleeve according to claim 1, wherein: the extrusion ball elastic bag (208) is filled with air, one end of each branch heat conduction wire (209) far away from the fixed heat conduction rope (202) penetrates through the outer wall of the extrusion ball elastic bag (208) and extends into the extrusion ball elastic bag (208), an elastic membrane (206) is connected to an opening in the outer wall of one side of the ball guide tube (204), and an elastic ball outlet hole (207) is formed in the middle of the elastic membrane (206).
4. A powder metallurgy process for a high thermal dissipating sleeve according to claim 3, wherein: the outer wall of the other side of the ball guide pipe (204) is provided with a branch heat conduction wire (209) matched with the ball extrusion elastic bag (208), the branch heat conduction wire (209) penetrates through the through hole (210) and is propped against the lowest refrigerating ball (205), the refrigerating ball (205) is made of saltpeter, and the top end of the ball guide pipe (204) is provided with a sealing cover.
5. The powder metallurgy process of the high heat dissipation type shaft sleeve according to claim 1, wherein: a pressing piece rod (112) matched with the annular die cavity (103) is movably arranged in the storage groove (111), and the bottom end of the pressing piece rod (112) is propped against the top end of the outer sleeve refrigerating hemisphere (201).
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| JP2009058016A (en) * | 2007-08-30 | 2009-03-19 | Panasonic Corp | Sleeve for fluid bearing device, fluid bearing device equipped therewith, spindle motor, information record regeneration processing device, and manufacturing method of sleeve therefor |
| CN102454715B (en) * | 2011-08-12 | 2014-04-23 | 万向钱潮股份有限公司 | Cardan universal joint, and manufacturing method for shaft sleeve for cardan universal joint |
| CN204823184U (en) * | 2015-06-29 | 2015-12-02 | 天奇自动化工程股份有限公司 | Retinue fast return device that vehicle chassis is unpowered |
| US20200338639A1 (en) * | 2017-11-17 | 2020-10-29 | Kevin Friesth | Advanced Automated Fabrication System And Methods For Thermal And Mechanical Components Utilizing Quadratic Or Squared Hybrid Direct Laser Sintering, Direct Metal Laser Sintering, CNC, Thermal Spraying, Direct Metal Deposition And Frictional Stir Welding. Cross-reference To Related Applications |
| CN109868404B (en) * | 2019-03-27 | 2020-12-22 | 成都川硬合金材料有限责任公司 | Hard alloy shaft sleeve and preparation method thereof |
| CN211117162U (en) * | 2019-11-18 | 2020-07-28 | 江苏华田机械装备有限公司 | Composite shaft sleeve |
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