CN113319281A - 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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- CN113319281A CN113319281A CN202110466568.2A CN202110466568A CN113319281A CN 113319281 A CN113319281 A CN 113319281A CN 202110466568 A CN202110466568 A CN 202110466568A CN 113319281 A CN113319281 A CN 113319281A
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- refrigeration
- ball
- shaft sleeve
- rope
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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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Devices That Are Associated With Refrigeration Equipment (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 the shaft sleeve, wherein the two sides of the shaft sleeve are fixedly connected with a refrigeration cooling external member, a fixed heat conducting rope in the refrigeration cooling external member not only can play a role of connection, but also can play a role of heat transfer, when the heat in the shaft sleeve is conducted into refrigeration water, a ball extruding elastic bag can be triggered to expand so that a refrigeration ball is extruded out of the refrigeration water, the refrigeration ball 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 prolonging the service life of the shaft sleeve, directly acting the refrigeration effect on the connection part of the shaft and the shaft sleeve through the fixed heat conducting rope, further improving the heat dissipation efficiency, only one refrigeration ball can be extruded and supplemented each time, thereby improving the practicality.
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 powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. The powder metallurgy method has similar places to the production of ceramics and belongs to the powder sintering technology, so a series of new powder metallurgy technologies can also be used for preparing ceramic materials. Due to the advantages of the powder metallurgy technology, the powder metallurgy technology becomes a key for solving the problem of new materials, and plays a significant role in the development of the new materials.
The shaft sleeve is a cylindrical mechanical part sleeved on the rotating shaft, in the prior art, when the shaft sleeve is manufactured through a powder metallurgy process, the heat dissipation effect of the manufactured shaft sleeve is poor due to the influence of process defects, high heat generated by long-time friction between the shaft sleeve and the shaft cannot be dissipated timely, the shaft sleeve is in a high-temperature state for a long time, the abrasion of the shaft sleeve can be increased, and the service life of the shaft sleeve is further shortened. Therefore, a powder metallurgy process of the high-heat-dissipation type shaft sleeve is provided.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a powder metallurgy process of a high-heat-dissipation type shaft sleeve, which can realize the connection forming device used in cooperation with the process, can integrally form the shaft sleeve of which both sides are fixedly connected with a refrigeration cooling suite, wherein a fixed heat conducting rope in the refrigeration cooling suite not only can play a role in connection, but also can play a role in heat transfer, can conduct heat in the shaft sleeve to refrigeration water, and simultaneously can trigger a ball-extruding elastic bag to expand so that a refrigeration ball is extruded out of the refrigeration water, the refrigeration ball 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 directly acting the refrigeration effect on the connection part of the shaft and the shaft sleeve through the fixed heat conducting rope, and then can further improve the radiating efficiency, the refrigeration ball only can be extruded one at every turn and can be replenished to the practicality has been improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
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 of a connecting and forming device;
s2, press forming: moving the connecting and forming device to a powder metallurgy press for pressing to obtain a blank piece, and connecting and fixing the refrigeration and cooling external member and the blank piece;
s3, sintering treatment: sending the blank fixedly connected with the refrigeration and cooling external member into a sintering furnace for sintering to obtain a semi-finished product;
s4, subsequent processing: and (4) carrying out oil immersion, finishing and deburring treatment on the semi-finished product to obtain the high-heat-dissipation type shaft sleeve.
Further, the connection forming device comprises a forming die provided with a cavity, a forming inner tube is fixedly connected to the middle of the cavity of the forming die, an annular die cavity is formed between the forming die and the forming inner tube, a rope pressing tube is fixedly connected to the inner wall of the bottom of the forming inner tube, a supporting spring is fixedly mounted in the rope pressing tube, 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 slidably connected with the supporting spring, a connecting rod is fixedly connected to the top end of the rope pressing block, and a compression column matched with the forming inner tube is fixedly connected to the top end of the connecting rod.
Further, sliding sleeve is equipped with the pressure flitch with annular die cavity assorted on the outer wall of shaping inner tube, receive equal fixedly connected with gangbar on the outer wall of post both sides, the gangbar is kept away from the one end and the pressure flitch fixed connection who receive the post, through the setting of connection forming device for back in pouring the annular die cavity with raw materials powder, through the press pressure down-pressing receive the post, can drive and press flitch downstream, thereby suppress raw materials powder, and then make blank.
Further, all seted up on the inner wall of forming die both sides and stored up a groove, it is provided with refrigeration cooling external member to store up a inslot, refrigeration cooling external member includes overcoat refrigeration hemisphere, overcoat refrigeration hemisphere is provided with a plurality of fixed heat conduction ropes on being close to the outer wall of shaping inner tube one side, overcoat refrigeration hemisphere intussuseption is filled with the refrigeration water, it is provided with the ball guide pipe to run through on the outer wall of overcoat refrigeration hemisphere, the ball guide pipe intussuseption is filled with a plurality of refrigeration balls, and a plurality of refrigeration balls are from top to bottom along sharp evenly distributed, be provided with crowded ball elastic bag in the overcoat refrigeration hemisphere, one side fixedly connected with heat conduction silk of fixed heat conduction rope.
Furthermore, one end of the fixed heat conducting rope penetrates through the outer wall of the forming inner cylinder and is clamped between the rope pressing block and the rope pressing cylinder, the fixed heat conducting rope is in sliding connection with the outer wall of the forming inner cylinder, the other end of the fixed heat conducting rope penetrates through the outer wall of the outer sleeve refrigeration hemisphere and extends into refrigeration water, the fixed heat conducting rope is made of flexible heat conducting materials, the fixed heat conducting rope in the annular die cavity can be kept horizontal by arranging the rope pressing cylinder, the supporting spring, the rope pressing block and the connecting rod, the rope pressing block and the rope pressing cylinder can clamp the fixed heat conducting rope, the fixed heat conducting rope can be prevented from falling when raw material powder is poured, the fixed heat conducting rope in the annular die cavity can be kept horizontal, and when the pressing column is pressed downwards, the pressing plate presses the raw material powder, the pressing column moves downwards, meanwhile, the rope pressing block can be driven to move downwards through the connecting rod, one end of the fixed heat conducting rope is not clamped any more, so that the fixed heat conducting rope can slide out of the forming inner cylinder when being pressed, and then make fixed heat conduction rope can not be broken by pressing, and make the blank after, can cut stretching out unnecessary fixed heat conduction rope 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, also be exactly the junction of axle and axle sleeve, make fixed heat conduction rope not only can play a connection effect, can be fixed to the axle sleeve with refrigeration cooling external member, and can play the effect of a heat transfer, lead the heat of axle and axle sleeve junction to the refrigeration and use aquatic, and then realize the quick heat dissipation to the axle sleeve.
Further, the outer wall that overcoat refrigeration hemisphere is close to shaping inner tube one side sets up to circular-arc with annular die cavity assorted for overcoat refrigeration hemisphere can laminate mutually with the axle sleeve that makes, and inlay on the outer wall that overcoat refrigeration hemisphere is close to shaping inner tube one side and install the heat conduction piece, and the heat conduction piece can lead the heat on the axle sleeve outer wall to the refrigeration water, thereby improves the radiating efficiency to the axle sleeve.
Furthermore, the ball-extruding elastic bag is filled with air, one end of the branch heat-conducting wire, which is far away from the fixed heat-conducting rope, penetrates through the outer wall of the ball-extruding elastic bag and extends into the ball-extruding elastic bag, an elastic film is connected with 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 film, a branch heat-conducting wire matched with the ball-extruding elastic bag is formed on the outer wall of the other side of the ball-guiding pipe, the branch heat-conducting wire penetrates through the through hole and abuts against the refrigeration ball at the lowest position, the refrigeration ball is made of saltpeter, when the fixed heat-conducting rope guides heat at the joint of the shaft and the shaft sleeve into refrigeration water, the branch heat-conducting wire can guide partial heat into the ball-extruding elastic bag, so that the air in the ball-extruding elastic bag is heated and expanded, and the refrigeration ball is extruded outwards, so that the refrigeration ball extrudes the elastic film, and the elastic ball outlet hole is expanded, until refrigeration ball pass elasticity play ball hole and drop to refrigeration and use the aquatic, and can only extrude a refrigeration ball at every turn, the refrigeration ball that the niter was made can absorb a large amount of heats when dissolving in water to provide the effect of a refrigeration cooling, 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.
Furthermore, a sealing cover is arranged at the top end of the ball guide pipe, and the refrigeration ball can be supplemented into the ball guide pipe by unscrewing the sealing cover, so that the refrigeration ball is convenient to supplement.
Furthermore, a pressing part rod matched with the annular die cavity is movably arranged in the piece storage groove, the bottom end of the pressing part rod is abutted against the top end of the outer sleeve refrigeration hemisphere, when raw materials are pressed, the pressing part rod not only can play a role in fixing the outer sleeve refrigeration hemisphere, but also can play a role in sealing when the outer sleeve refrigeration hemisphere inclines inwards, and the raw materials are prevented from entering the piece storage groove.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme is provided with a connecting and forming device used in cooperation with the process, and can integrally form the shaft sleeve of which both sides are fixedly connected with the refrigeration and cooling external member, the fixed heat conducting rope in the refrigeration and cooling external member not only can play a role of connection, but also can play a role of heat transfer, when the heat in the shaft sleeve can be conducted into the refrigeration water, the fixed heat conducting rope can trigger the ball-extruding elastic bag to expand so that the refrigeration ball is extruded out of the refrigeration water, the refrigeration ball made of the saltpeter can absorb a large amount of heat when dissolved in the water, thereby providing a refrigeration and 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 conducting rope, further improving the heat dissipation efficiency, and the refrigeration ball can be extruded out one and supplemented each time, thereby improving the practicality.
(2) Through the arrangement of the rope pressing barrel, the supporting spring, the rope pressing block and the connecting rod, the rope pressing block and the rope pressing barrel clamp the fixed heat conducting rope, the fixed heat conducting rope can be prevented from dropping when raw material powder is poured, so that the fixed heat conducting rope in the annular die cavity can be kept horizontal, when the pressed column is pressed downwards to enable the pressing plate to press the raw material powder, the pressed column moves downwards, and meanwhile, the connecting rod can drive the rope pressing block to move downwards, one end of the fixed heat conducting rope is not clamped any more, so that the fixed heat conducting rope can slide out of the forming inner cylinder when being pressed, further the fixed heat conducting rope can not be pressed to be broken, and after a blank piece is manufactured, redundant fixed heat conducting rope extending into the blank piece can be cut off, so that the end of the fixed heat conducting rope 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 can not only play a role of connection, can be fixed to the axle sleeve with refrigeration cooling external member on, and can play the effect of a heat transfer, lead the axle to the refrigeration with aquatic with the heat of axle sleeve junction, and then realize the quick heat dissipation to the axle sleeve.
(3) The outer wall that overcoat refrigeration hemisphere is close to shaping inner tube one side sets up to circular-arcly with annular die cavity assorted for overcoat refrigeration hemisphere can laminate mutually with the axle sleeve that makes, and inlays on the outer wall that overcoat refrigeration hemisphere is close to shaping inner tube one side and install the heat conduction piece, and the heat conduction piece can lead the heat on the axle sleeve outer wall to the aquatic for refrigeration, thereby improves the radiating efficiency to the axle sleeve.
(4) The ball-extruding elastic bag is filled with air, one end of the branch heat conducting wire, which is far away from the fixed heat conducting rope, penetrates through the outer wall of the ball-extruding elastic bag and extends into the ball-extruding elastic bag, the outer wall of one side of the ball guide pipe is provided with an elastic membrane, the middle part of the elastic membrane is provided with an elastic ball outlet hole, the outer wall of the other side of the ball guide pipe is provided with a branch heat conducting wire matched with the ball-extruding elastic bag, the branch heat conducting wire penetrates through the through hole and is abutted against the refrigeration ball at the bottom, the refrigeration ball is made of saltpeter, when the fixed heat conducting rope guides the heat at the joint of the shaft and the shaft sleeve into the refrigeration water, the branch heat conducting wire can guide partial heat into the ball-extruding elastic bag, so that the air in the ball-extruding elastic bag is heated and expanded, the ball-extruding elastic bag extrudes the refrigeration ball outwards, the refrigeration ball extrudes the elastic membrane, the elastic ball outlet hole is expanded until the refrigeration ball passes through the elastic ball outlet hole and falls into the refrigeration water, and only can extrude a refrigeration ball at every turn, the refrigeration ball that the nitre was made can absorb a large amount of heats when dissolving in water to provide the effect of a refrigeration cooling, 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.
(5) The top end of the ball guide pipe is provided with a sealing cover, and the sealing cover is unscrewed, so that the refrigeration ball can be supplemented into the ball guide pipe, and the refrigeration ball is convenient to supplement.
(6) Store up a inslot activity be provided with annular die cavity assorted casting die pole, the bottom of casting die pole offsets with the top of overcoat refrigeration hemisphere, when suppressing the raw materials, casting die pole not only can play a fixed action to overcoat refrigeration hemisphere, and overcoat refrigeration hemisphere leanin still can play a sealing action, prevents that the raw materials from getting into and stores up a groove.
Drawings
FIG. 1 is a schematic cross-sectional view of a connection molding apparatus according to the present invention;
FIG. 2 is a schematic cross-sectional view of the inner forming cylinder of the present invention;
FIG. 3 is a schematic cross-sectional view of a refrigeration cooling kit according to the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;
FIG. 5 is a schematic top view of the outer cover refrigeration hemisphere of the present invention;
FIG. 6 is a schematic cross-sectional view of a high heat dissipation type bushing according to the present invention;
FIG. 7 is a process flow diagram of the present invention.
The reference numbers in the figures illustrate:
101. forming a mold; 102. forming an inner cylinder; 103. an annular mold cavity; 104. rope pressing drums; 105. a support spring; 106. rope pressing blocks; 107. a connecting rod; 108. a pressurized column; 109. a material pressing plate; 110. a linkage rod; 111. a workpiece storage groove; 112. a presser bar; 201. a refrigeration hemisphere is sleeved outside; 202. fixing the heat conducting rope; 203. refrigeration water; 204. a ball guide tube; 205. cooling the balls; 206. an elastic film; 207. an elastic ball outlet hole; 208. extruding a ball elastic bag; 209. supporting heat conducting wires; 210. a through hole; 211. a heat conducting block.
Detailed Description
The technical solution 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 obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-7, a powder metallurgy process for 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 piece, and connecting and fixing the refrigeration and cooling external member and the blank piece;
s3, sintering treatment: sending the blank fixedly connected with the refrigeration and cooling external member into a sintering furnace for sintering to obtain a semi-finished product;
s4, subsequent processing: and (4) carrying out oil immersion, finishing and deburring treatment on the semi-finished product to obtain the high-heat-dissipation type shaft sleeve.
Referring to fig. 1-2, the connection forming device includes a forming mold 101 having a cavity, a forming inner cylinder 102 is fixedly connected to the middle of the cavity of the forming mold 101, an annular mold cavity 103 is formed between the forming mold 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 slidably connected to the supporting spring 105, a connecting rod 107 is fixedly connected to the top end of the rope pressing block 106, a pressure column 108 matched with the forming inner cylinder 102 is fixedly connected to the top end of the connecting rod 107, a pressure plate 109 matched with the annular mold cavity 103 is slidably sleeved on the outer wall of the forming inner cylinder 102, linkage rods 110 are fixedly connected to the outer walls on both sides of the pressure column 108, one end of the linkage rod 110 far away from the pressure column 108 is fixedly connected to the pressure plate 109, through the setting of connecting forming device for after pouring raw materials powder into annular die cavity 103, press down through the press and receive the pressure post 108, can drive and press flitch 109 downstream, thereby suppress raw materials powder, and then make the blank.
Referring to fig. 1, 3-4 and 6, the inner walls of two sides of the forming mold 101 are respectively provided with a storage groove 111, a refrigeration cooling kit is arranged in the storage groove 111, the refrigeration cooling kit comprises a jacket refrigeration hemisphere 201, the outer wall of the jacket refrigeration hemisphere 201 close to one side of the forming inner cylinder 102 is provided with a plurality of fixed heat conducting ropes 202, the jacket refrigeration hemisphere 201 is filled with refrigeration water 203, the outer wall of the jacket refrigeration hemisphere 201 is provided with a ball guiding pipe 204 in a penetrating manner, the ball guiding pipe 204 is filled with a plurality of refrigeration balls 205, the plurality of refrigeration balls 205 are uniformly distributed along a straight line from top to bottom, the jacket refrigeration hemisphere 201 is provided with a ball extruding elastic bag 208, one side of the fixed heat conducting rope 202 is fixedly connected with a heat conducting wire 209, one end of the fixed heat conducting rope 202 penetrates through the outer wall of the forming inner cylinder 102 and is clamped between the rope pressing block 106 and the rope pressing cylinder 104, and the fixed heat conducting rope 202 is connected with the outer wall of the forming inner cylinder 102 in a sliding manner, the other end of the fixed heat conducting rope 202 penetrates through the outer wall of the outer casing refrigeration hemisphere 201 and extends into the refrigeration water 203, the fixed heat conducting rope 202 is made of flexible heat conducting materials, through the arrangement of the rope pressing cylinder 104, the supporting spring 105, the rope pressing block 106 and the connecting rod 107, the rope pressing block 106 and the rope pressing cylinder 104 clamp the fixed heat conducting rope 202, the fixed heat conducting rope 202 can be prevented from drooping when raw material powder is poured, the fixed heat conducting rope 202 in the annular die cavity 103 can be kept horizontal, when the pressing column 108 is pressed downwards to enable the pressing plate 109 to press the raw material powder, the pressing column 108 moves downwards, meanwhile, the connecting rod 107 can drive the rope pressing block 106 to move downwards, one end of the fixed heat conducting rope 202 is not clamped any more, therefore, when the fixed heat conducting rope 202 is pressed, the fixed heat conducting rope can slide out of the forming inner cylinder 102, the fixed heat conducting rope 202 can not be broken by pressing, and after a blank piece is manufactured, can cut off the fixed heat conduction rope 202 that stretches out unnecessary in the blank, as shown in fig. 7, make the end of fixed heat conduction rope 202 be in the inner wall edge of the axle sleeve that makes just, also be exactly the junction of axle and axle sleeve for fixed heat conduction rope 202 not only can play a connection effect, can be fixed to the axle sleeve with refrigeration cooling external member, and can play the effect of a heat transfer, lead the heat of axle and axle sleeve junction to refrigeration water 203, and then realize the quick heat dissipation to the axle sleeve.
Referring to fig. 3 and 5, the outer wall of the outer refrigeration hemisphere 201 close to the inner molding cylinder 102 is set to be arc-shaped and matched with the annular mold cavity 103, so that the outer refrigeration hemisphere 201 can be attached to the manufactured shaft sleeve, and the outer wall of the outer refrigeration hemisphere 201 close to the inner molding cylinder 102 is embedded with the heat conduction block 211, and the heat conduction block 211 can conduct heat on the outer wall of the shaft sleeve to the refrigeration water 203, thereby improving the heat dissipation efficiency of the shaft sleeve.
Referring to fig. 3-4, air is filled in the ball-squeezing 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 ball-squeezing elastic bag 208 and extends into the ball-squeezing elastic bag 208, an opening is formed in the outer wall of one side of the ball-guiding tube 204 and is connected with the elastic membrane 206, an elastic ball-outlet hole 207 is formed in the middle of the elastic membrane 206, a branch heat-conducting wire 209 matched with the ball-squeezing elastic bag 208 is formed in the outer wall of the other side of the ball-guiding tube 204, the branch heat-conducting wire 209 penetrates through the through hole 210 and abuts against the lowermost refrigerating ball 205, the refrigerating ball 205 is made of saltpeter stone, when the fixed heat-conducting rope 202 conducts heat at the joint of the shaft and the shaft sleeve to the refrigerating water 203, the branch heat-conducting wire 209 can conduct part of heat to the ball-squeezing elastic bag 208, so that the air in the ball-squeezing elastic bag 208 is heated and expanded, thereby the ball-squeezing elastic bag 208 extrudes the refrigerating ball 205 outwards, and the refrigerating ball 205 extrudes the elastic membrane 206, make elasticity play ball hole 207 propped greatly, until refrigeration ball 205 passes elasticity play ball hole 207 and drops to refrigeration water 203, and can only extrude a refrigeration ball 205 at every turn, refrigeration ball 205 that the niter was made can absorb a large amount of heats when dissolving in water to provide the effect of a refrigeration cooling, 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.
The top of ball guide pipe 204 is provided with sealed lid, unscrew sealed lid, can supply refrigeration ball 205 in the ball guide pipe 204, make refrigeration ball 205 be convenient for supply, storage groove 111 internalization is provided with and presses the part pole 112 with annular die cavity 103 assorted, press the bottom of part pole 112 and the top of overcoat refrigeration hemisphere 201 counterbalance, when suppressing the raw materials, press the part pole 112 not only can play a fixed action to overcoat refrigeration hemisphere 201, overcoat refrigeration hemisphere 201 leanin, still can play a sealing action, prevent that the raw materials from getting into storage groove 111.
The invention is provided with the connecting and forming device used in cooperation with the process, and can integrally form the shaft sleeve of which both sides are fixedly connected with the refrigeration and cooling external member, the fixed heat-conducting rope 202 in the refrigeration and cooling external member not only can play a role of connection, but also can play a role of heat transfer, and can trigger the expansion of the ball-extruding elastic bag 208 to extrude the refrigeration ball 205 out of the refrigeration water 203 while guiding the heat in the shaft sleeve into the refrigeration water 203, the refrigeration ball 205 made of saltpeter can absorb a large amount of heat when dissolved in water, thereby providing a refrigeration and cooling effect, greatly improving the heat-radiating efficiency of the shaft sleeve, effectively reducing the abrasion of the shaft sleeve, further prolonging 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-conducting rope 202, further improving the heat-radiating efficiency, the refrigeration ball 205 can be extruded one at a time and can be supplemented, thereby improving the practicality.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. The powder metallurgy process of the 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 piece, and connecting and fixing the refrigeration and cooling external member and the blank piece;
s3, sintering treatment: sending the blank fixedly connected with the refrigeration and cooling external member into a sintering furnace for sintering to obtain a semi-finished product;
s4, subsequent processing: and (4) carrying out oil immersion, finishing and deburring treatment on the semi-finished product to obtain the high-heat-dissipation type shaft sleeve.
2. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 1, wherein: the connecting and forming device comprises a forming die (101) with a cavity, the middle of the cavity of the forming die (101) is fixedly connected with a forming inner barrel (102), and an annular die cavity (103) is formed between the forming die (101) and the forming inner barrel (102).
3. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 2, wherein: the inner wall of the bottom of the forming inner cylinder (102) is fixedly connected with a rope pressing cylinder (104), a supporting spring (105) is fixedly installed in the rope pressing cylinder (104), the top end of the supporting spring (105) is fixedly connected with a rope pressing block (106) matched with the supporting spring (105), the rope pressing block (106) is in sliding connection with the supporting spring (105), the top end of the rope pressing block (106) is fixedly connected with a connecting rod (107), and the top end of the connecting rod (107) is fixedly connected with a compression column (108) matched with the forming inner cylinder (102).
4. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 3, wherein: the outer wall of the forming inner cylinder (102) is slidably sleeved with a pressure plate (109) matched with the annular mold cavity (103), the outer walls of two sides of the compression column (108) are fixedly connected with linkage rods (110), and one ends of the compression column (108) far away from the linkage rods (110) are fixedly connected with the pressure plate (109).
5. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 2, wherein: all seted up storage groove (111) on the inner wall of forming die (101) both sides, be provided with refrigeration cooling external member in storage groove (111), refrigeration cooling external member includes overcoat refrigeration hemisphere (201), overcoat refrigeration hemisphere (201) are provided with a plurality of fixed heat conduction ropes (202) on being close to the outer wall of shaping inner tube (102) one side, overcoat refrigeration hemisphere (201) intussuseption is filled with refrigeration water (203), it is provided with ball guide pipe (204) to run through on the outer wall of overcoat refrigeration hemisphere (201), ball guide pipe (204) intussuseption is filled with a plurality of refrigeration balls (205), and a plurality of refrigeration balls (205) are from top to bottom along sharp evenly distributed, be provided with crowded ball elastic bag (208) in overcoat refrigeration hemisphere (201), one side fixedly connected with of fixed heat conduction rope (202) leads hot wire (209).
6. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 5, wherein: one end of the fixed heat conducting rope (202) penetrates through the outer wall of the forming inner cylinder (102) and is clamped between the rope pressing block (106) and the rope pressing cylinder (104), 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 conducting rope (202) penetrates through the outer wall of the outer sleeve refrigeration hemisphere (201) and extends into refrigeration water (203), and the fixed heat conducting rope (202) is made of a flexible heat conducting material.
7. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 5, wherein: the outer wall of one side, close to the forming inner cylinder (102), of the outer sleeve refrigeration hemisphere (201) is set to be arc-shaped matched with the annular cavity (103), and the outer wall of one side, close to the forming inner cylinder (102), of the outer sleeve refrigeration hemisphere (201) is embedded with the heat conduction block (211).
8. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 5, wherein: the ball extruding elastic bag (208) is filled with air, one end, far away from the fixed heat conducting rope (202), of each heat conducting wire (209) penetrates through the outer wall of the ball extruding elastic bag (208) and extends into the ball extruding elastic bag (208), an elastic film (206) is connected to an opening in the outer wall of one side of the ball guiding pipe (204), and an elastic ball outlet hole (207) is formed in the middle of the elastic film (206).
9. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 8, wherein: the outer wall of the other side of the ball guide pipe (204) is provided with a heat conducting wire (209) matched with the ball extruding elastic bag (208), the heat conducting wire (209) penetrates through the through hole (210) and abuts against the refrigeration ball (205) at the lowest part, the refrigeration ball (205) is made of saltpeter, and the top end of the ball guide pipe (204) is provided with a sealing cover.
10. The powder metallurgy process for the high heat dissipation type shaft sleeve according to claim 5, wherein: a pressing piece rod (112) matched with the annular die cavity (103) is movably arranged in the piece storage groove (111), and the bottom end of the pressing piece rod (112) is abutted against the top end of the outer sleeve refrigeration hemisphere (201).
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| CN113319281B (en) | 2023-06-16 |
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