CN115647562B - Friction stir tunnel forming device and method - Google Patents
Friction stir tunnel forming device and method Download PDFInfo
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- CN115647562B CN115647562B CN202211373851.1A CN202211373851A CN115647562B CN 115647562 B CN115647562 B CN 115647562B CN 202211373851 A CN202211373851 A CN 202211373851A CN 115647562 B CN115647562 B CN 115647562B
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Abstract
A friction stir tunnel forming device and a method relate to a tunnel forming device and a method. The invention aims to solve the problems that the existing liquid cooling radiator processing method is easy to cause defects in the process of welding a liquid cooling plate, water leakage occurs in the application process, and the normal operation of a chip is seriously influenced. The forming device comprises an upper rotating body, a transition part, a disc spring part, a positioning part, a switching part, a shaft shoulder part and a lower rotating body; the transition part is coaxially sleeved at the lower part of the upper rotating body, the disc spring part and the positioning part are sequentially coaxially sleeved at the outer side of the transition part from top to bottom, the upper surface of the shaft shoulder part is fixedly connected with the lower surface of the positioning part, the upper part of the lower rotating body passes through the shaft shoulder part from bottom to top and then is coaxially inserted into the lower end of the upper rotating body, the switching part is coaxially sleeved at the upper part of the lower rotating body, and the switching part is positioned in the upper part of the shaft shoulder part. The invention belongs to the field of machining.
Description
Technical Field
The invention relates to a tunnel forming device and a tunnel forming method, and belongs to the field of machining.
Background
With the continuous development of integrated technology, more and more high-integration and miniaturized systems are widely applied to all-round fields such as wireless communication, military industry, aerospace, automobile manufacturing and the like. The integrated system usually uses chips, and the chip manufacturing technology is also continuously developed, but the integrated system is more and more serious in heat dissipation problem and a new fast and efficient heat dissipation mode which is urgently required under the advantages of high integration level, high power, small volume and the like.
Conventional air-cooled finned heat sinks have difficulty in meeting the current increasingly high heat dissipation demands, so liquid-cooled heat sinks have become an indispensable solution for heat dissipation of chip devices. The existing liquid cooling radiator processing method is to process a tunnel first, then cover and weld another liquid cooling plate to seal the tunnel, and the processing method needs two processing procedures, and the processing procedure is troublesome. And defects easily occur in the process of welding the liquid cooling plate, so that water leakage occurs in the application process, and the normal operation of the chip is seriously influenced. In view of the above, the invention aims to provide a single-process friction stir liquid cooling tunnel forming method based on the principle of friction stir large plastic deformation, which has the core advantages of only one processing procedure, simple processing process and good adaptability to forming of special internal structures such as cross tunnels, highly continuous change tunnels and the like.
Disclosure of Invention
The invention aims to solve the problems that the existing liquid cooling radiator processing method is easy to cause defects in the process of welding a liquid cooling plate, water leakage occurs in the application process, and the normal operation of a chip is seriously influenced, and further provides a stirring friction tunnel forming device and a stirring friction tunnel forming method.
The technical scheme adopted by the invention for solving the problems is as follows: the friction stir tunnel forming device comprises an upper rotating body, a transition part, a disc spring part, a positioning part, a switching part, a shaft shoulder part and a lower rotating body; the transition part is coaxially sleeved at the lower part of the upper rotating body, the disc spring part and the positioning part are sequentially coaxially sleeved at the outer side of the transition part from top to bottom, the upper surface of the shaft shoulder part is fixedly connected with the lower surface of the positioning part, the upper part of the lower rotating body passes through the shaft shoulder part from bottom to top and then is coaxially inserted into the lower end of the upper rotating body, the switching part is coaxially sleeved at the upper part of the lower rotating body, and the switching part is positioned in the upper part of the shaft shoulder part.
Further, the upper rotating body is formed by coaxially and fixedly connecting a clamping handle, an upper clamping part and a fixing part from top to bottom in sequence, and a cylindrical rotating screw hole for connecting with the lower rotating body is formed in the lower end face of the fixing part.
Further, the transition portion is a prism with a regular polygon cross section, the lower end face of the transition portion is provided with a first cylindrical hole penetrating up and down, the lower end face of the transition portion is provided with at least one group of first screw holes which are arranged in a central symmetry mode, and the first screw holes are used for inserting screws and are fixedly connected with the switching portion in a coaxial mode.
Further, the locating part comprises annular lower clamping part, and the lower surface of lower clamping part is equipped with at least one set of second screw that is central symmetry and sets up, and the second screw is used for inserting the upper surface fixed connection of screw and shaft shoulder, and the upper surface of lower clamping part and upper clamping part lower surface centre gripping dish spring part in the centre.
Further, the middle part of the switching part is provided with a through hole for the upper part of the lower rotating body to pass through, the upper surface of the switching part is provided with at least one group of third screw holes which are arranged in a central symmetry way, and the third screw holes are used for inserting screws and fixedly connecting with the transition part.
Further, the shaft shoulder part comprises a round platform part and a round corner round platform part; the round platform portion and the round angle round platform portion are fixedly connected into a whole from top to bottom, the center of the upper surface of the round platform portion is provided with a second cylindrical hole, the center of the lower surface of the round angle round platform portion is provided with a square hole, and the square hole is coaxial with and communicated with the second cylindrical hole.
Further, the lower rotator comprises a fixed part, a cylindrical part, a cuboid part and a stirring needle part which are sequentially and coaxially fixedly connected from top to bottom, the outer wall of the fixed part is provided with threads matched with the cylindrical rotary screw hole, and the outer wall of the stirring needle part is provided with threads.
The specific steps of the friction stir tunnel forming method provided by the invention are as follows:
step one, fixedly connecting an upper rotating body with a main shaft of mechanical processing equipment;
setting an initial position, a sinking depth, a travelling speed, a moving speed and a termination position of the stirring pin part of the lower rotating body;
starting the machining equipment to enable the stirring pin part of the lower rotating body to move according to the data set in the step two;
step four, sucking and accumulating materials upwards to the top of the plate because the surface of the stirring pin part is provided with threads in the advancing process of the stirring pin part, and forming a tunnel in the advancing direction of the stirring pin part in the plate;
and fifthly, introducing cooling liquid into the tunnel formed in the fourth step, and radiating the part to be radiated.
The specific steps of the friction stir tunnel forming method provided by the invention are as follows:
step one, after the first friction stir tunnel forming is carried out, when the cross tunnel forming is carried out again, the stirring pin part moves to a preset position and sinks to the preset depth;
secondly, when the top material formed by the first friction stir tunnel is piled up in the advancing process of the cross tunnel forming, the shaft shoulder part receives pressure and transmits the pressure to the disc spring part when contacting with the piled up convex material in the process of rotating and advancing at high speed, so that the disc spring part stretches and contracts, and the shaft shoulder part stretches and contracts up and down together with the shaft shoulder part;
step three, the stirring pin part fixed with the upper rotating body does not float up and down, and continuously moves along the preset track, and the shaft shoulder part passively stretches and floats up and down respectively when contacting with and separating from the stacked materials, so that the problem of unstable cross tunnel forming caused by direct large-area interference contact between the shaft shoulder part and the stacked materials is avoided.
The specific steps of the friction stir tunnel forming method provided by the invention are as follows:
setting an initial position, a sinking depth, a travelling speed, a rotating speed and a termination position of a stirring needle part;
step two, the lower rotating body, the switching part and the upper rotating body move up and down together by adjusting the height of the stirring pin part in the advancing process of the stirring pin part;
and thirdly, as the disc spring part has elasticity, the disc spring part drives the positioning part and the shaft shoulder part to move longitudinally relative to the surface of the plate, namely the lower surface of the shaft shoulder part is always attached to the surface of the plate, and the stirring pin part actively moves up and down, so that the tunnel with continuously variable height and stable forming capability is prepared.
The beneficial effects of the invention are as follows:
1. the invention can finish the integral forming of the liquid cooling tunnel structure by only a single process, greatly reduces the processing procedures, greatly improves the feasibility of actual production and large-scale use, and has the characteristics of simple process, low production cost and high processing efficiency;
2. the invention can ensure the stable forming of the crossing point in the process of stirring friction crossing tunnel; the tunnel forming rule can be ensured in the basic tunnel forming process; in the tunnel forming with continuously variable height, the accumulation height of the surface material of the processed plate is basically unchanged, and the tunnel forming is more regular and stable;
3. the invention has wide application range, can pertinently select the model size of the detachable stirring head according to the target plate, can perform pertinence liquid cooling tunnel forming on the corresponding plates of different materials in different fields, and can obviously improve the effect on the different fields and the different heat dissipation requirements.
Drawings
FIG. 1 is a schematic perspective view of a friction stir tunnel forming apparatus;
FIG. 2 is a front cross-sectional view of a friction stir tunnel forming device;
fig. 3 is an exploded schematic view of a friction stir tunnel forming apparatus.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 to 3, and the friction stir tunnel forming device according to the present embodiment includes an upper rotating body 1, a transition portion 2, a disc spring portion 3, a positioning portion 4, an adapter portion 5, a shaft shoulder portion 6, and a lower rotating body 7; the transition part 2 is coaxially sleeved at the lower part of the upper rotating body 1, the disc spring part 3 and the positioning part 4 are sequentially coaxially sleeved at the outer side of the transition part 2 from top to bottom, the upper surface of the shaft shoulder part 6 is fixedly connected with the lower surface of the positioning part 4, the upper part of the lower rotating body 7 passes through the shaft shoulder part 6 from bottom to top and then is coaxially inserted into the lower end of the upper rotating body 1, the switching part 5 is coaxially sleeved at the upper part of the lower rotating body 7, and the switching part 5 is positioned in the upper part of the shaft shoulder part 6.
In this embodiment, the disc spring portion 3 is formed by sequentially stacking a plurality of disc springs. The disc spring part 3 is used for transmitting the accumulated material to the disc spring part 3 under the pressure in the high-speed rotation advancing process of the shaft shoulder part 6 so that the accumulated material is elastically deformed to float upwards or the accumulated material is separated from the shaft shoulder part 6, then the pressure is eliminated, and the disc spring part 3 is restored to the original state and the shaft shoulder part 6 continue to rotate together and advance.
The upper rotating body 1 is connected with equipment spindles such as a friction stir welding machine, a numerical control milling machine, a numerical control machining center and the like, and clamps and fixes the disc spring part 3 with the positioning part 4, and a cylindrical screw hole is formed in the lower part of the upper rotating body 1 and used for connecting the lower rotating body 7; the transition part 2 is connected with the upper rotating body 1 and the disc spring part 3 so as to realize the relative static of the disc spring part 3 and the stirring head in the high-speed rotation process; the disc spring part 3 is a part which is formed by connecting a plurality of disc springs in series or in parallel and is arranged between the upper rotating body 1 and the positioning part 4 and outside the transition part 2, and can longitudinally and elastically stretch out and draw back under the action of pressure to provide elastic support for the longitudinal movement of the positioning part 4 and the shaft shoulder part 6, so that the positioning part 4 and the shaft shoulder part 6 can be attached and floated along with the active or passive height change of the forming surface of the crossed tunnel; the positioning part 4 is used for clamping and fixing the disc spring part 3 together with the upper rotating body 1 and is connected with the shaft shoulder part 6; the switching part 5 is fixed at the bottom of the transition part 2 through a screw, does not float up and down, and is used for preventing the positioning part 4 and the shaft shoulder part 6 from falling down due to the action of gravity in the running process; the shaft shoulder 6 is connected with the positioning part 4 through screws and has a detachable function; the lower rotator 7 is used for realizing the rotary flow and upward suction of materials, so that the preparation of a cross tunnel is realized, the upper part of the lower rotator 7 is provided with a cylindrical threaded structure and is used for being connected with the upper rotator 1, the middle part of the lower rotator 7 is provided with a cylindrical part and a cuboid part, the cylindrical part is used for connecting the shaft shoulder 6 and the switching circular ring, the cuboid part is used for fixing the shaft shoulder 6 to enable the shaft shoulder 6 to be relatively static with a stirring head in a high-speed rotation process, the lower part of the lower rotator 7 is provided with a cylindrical threaded stirring pin, the thread direction is the same as the upper part of the lower rotator 7, the lower rotator 7 is prevented from being separated from the upper rotator 1 in the high-speed rotation process, and the rotary flow and upward suction of materials are realized.
The outer diameter of the disc spring part 3 is 22.5-50mm, the outer diameter of the disc spring is equal to that of the positioning part 4, the inner diameter of the disc spring is 11.2-25.4mm, the disc spring is in clearance fit with the transition part 2, and a clearance of 0.1-0.3mm is arranged outside the transition part 2; the overall height of the disc spring 3 in the relaxed state is 5 to 100mm.
The second embodiment is as follows: referring to fig. 1 to 3, an upper rotor 1 of a friction stir tunnel forming device according to the present embodiment is formed by coaxially and fixedly connecting a grip handle 101, an upper grip 102 and a fixing portion 103 in this order from top to bottom, and a cylindrical rotation screw hole 10301 for connecting with a lower rotor 7 is provided at a lower end surface of the fixing portion 103.
The height of the fixing part 103 is the sum of the heights of the transition part 2 and the adapter part 5, and the outer diameter of the fixing part is 10-35mm; the cylindrical rotation screw hole 10301 is not smaller than the length of the upper thread of the lower rotating body 7, is 15-50mm,
other components and connection relationships are the same as those of the first embodiment.
And a third specific embodiment: referring to fig. 1 to 3, a description is given of this embodiment, in which the transition portion 2 of the friction stir tunnel forming device is a prism with a regular polygon cross section, a first cylindrical hole 201 penetrating vertically is provided on a lower end surface of the transition portion 2, at least one set of first screw holes 202 arranged in a central symmetry manner is provided on a lower end surface of the transition portion 2, and the first screw holes 202 are used for inserting screws and fixedly connecting with the adapter portion 5 coaxially.
The first cylindrical hole 201 is in clearance fit with the outer surface of the fixed part 103 of the upper rotating body 1, the edge at the outer side of the transition part 2 is in clearance fit with the cylindrical surface at the inner side of the disc spring part 3, and the transition part 2 is used for connecting transmission to enable the disc spring part 3 and the upper rotating body 1 to rotate at a high speed together in a relatively static state.
The inner diameter of the first cylindrical hole 201 is 11-25mm, the first cylindrical hole is in clearance fit with the outer side of the lower cylinder of the upper rotating body 1, the outer diameter of the transition part 2 is 22-50mm, the transition part 2 is in clearance fit with the inner side of the disc spring part 3, and the height of the transition part 2 is the sum of the total height of the disc spring part 3 and the height of the lower clamping part.
Other components and connection relationships are the same as those of the first embodiment.
The specific embodiment IV is as follows: referring to fig. 1 to 3, a positioning portion 4 of a friction stir tunnel forming device according to this embodiment is formed by a circular lower clamping portion 401, and at least one set of second screw holes 402 arranged in central symmetry are provided on the lower surface of the lower clamping portion 401, and the second screw holes 402 are used for fixedly connecting an insertion screw with the upper surface of the shaft shoulder portion 6, and the disc spring portion 3 is clamped between the upper surface of the lower clamping portion 401 and the lower surface of the upper clamping portion 102.
The lower clamping portion 401 is used to clamp the disc spring portion 3 together with the upper clamping portion 102 of the upper rotating body 1 to provide an elastic supporting surface for the disc spring portion 3, and transmit the pressure applied by the shaft shoulder portion 6 to the disc spring portion 3.
The inner diameter of the positioning part 4 is the same as that of the disc spring part 3, and a gap of 0.1-0.3mm is formed between the positioning part 4 and the outer side of the transition part 2, and the positioning part 4 is in clearance fit with the transition part 2; the positioning part 4 is pressed upwards by the pressure transmitted by the shaft shoulder part 6 to elastically deform the disc spring; the positioning portion 4 has the same outer diameter as the disc spring portion 3, and has a plurality of second screw holes 402 formed in a center symmetrical manner about the center axis for connection and fixation with the shoulder portion 6.
Other components and connection relationships are the same as those of the first or second embodiment.
Fifth embodiment: referring to fig. 1 to 3, in the friction stir tunnel forming device according to the present embodiment, a through hole 501 for passing through the upper portion of the lower rotating body 7 is provided in the middle of the adapting portion 5, at least one set of third screw holes 502 arranged in a central symmetry manner are provided on the upper surface of the adapting portion 5, and the third screw holes 502 are used for inserting screws and fixedly connected with the transition portion 2.
The switching part 5 is fixed with the transition part 2 and clamps the positioning part together with the disc spring part 3 to prevent the positioning part 4 and the shaft shoulder part 6 from falling down due to the action of gravity in the running process.
The inner wall of the through hole 501 and the outer side of the lower cylinder of the upper rotating body 1 are provided with a gap of 0.1-0.2mm, and the adapter part 5 is in clearance fit with the lower cylinder of the upper rotating body 1; the outer diameter of the adapter part 5 is 0.1-0.2mm away from the inner side of the cylindrical hole at the upper half part of the shaft shoulder part 6, the adapter part 5 is in clearance fit with the cylindrical hole at the upper half part of the shaft shoulder part 6 and is 15-35mm, and a plurality of screw holes which are symmetrical with each other at the center are formed by taking the central shaft as the axis and are used for being fixed with the transition part, so that the positioning part and the shaft shoulder part are prevented from falling downwards due to the action of gravity in the advancing process; the height of the adapter part 5 is 2-5mm.
Other components and connection relationships are the same as those of the first embodiment.
Specific embodiment six: the present embodiment will be described with reference to fig. 1 to 3, in which the shoulder portion 6 of the friction stir tunnel forming device according to the present embodiment includes a round truncated cone portion 602 and a round truncated cone portion 603; the round platform portion 602 and the round angle round platform portion 603 are fixedly connected into a whole from top to bottom, a second cylindrical hole 60201 is formed in the center of the upper surface of the round platform portion 602, a square hole 60301 is formed in the center of the lower surface of the round angle round platform portion 603, and the square hole 60301 is coaxial with and communicated with the second cylindrical hole 60201.
The upper surface of the round platform part 602 is provided with a fourth screw hole 601, and the fourth screw hole 601 is fixedly connected with the second screw hole 402 through a screw; the second cylindrical hole 60201 is clearance fit with the outer side of the cylindrical portion 702 of the lower rotating body 7; the square hole 60301 is in clearance fit with the outer side of the rectangular body 703 of the lower rotating body 7;
when friction stir cross tunnel forming is carried out, when the bottom round corner of the shaft shoulder 6 contacts the material 8 piled on the top of the plate friction stir tunnel forming for the first time in the high-speed rotation advancing process, the pressure is transmitted to the disc spring part 3 through the positioning part 4 due to the pressure, so that the disc spring part 3 is elastically deformed and is shrunk upwards, the positioning part 4 and the shaft shoulder 6 are driven to float upwards together, when the shaft shoulder 6 floats to the top of the piled material 8, the floating is stopped due to no pressure, and as no material exists in the tunnel 9 formed by the first friction stir tunnel forming, when the stirring needle part 704 passes through the area at the sinking height of the first friction stir tunnel forming, the height of the material piled part 8 is not changed or the total volume is unchanged, when the stirring needle part 704 continues to move to the bottom round corner of the shaft shoulder part 6 and completely breaks away from the piled material 8, the shaft shoulder part 6 is not stressed, the disc spring part 3 is restored to the original state, and the whole body continues to advance in the state before encountering the crossing point, so that the problem that stable forming is difficult to be carried out is solved; when friction stir basic tunnel forming is performed, the traveling state of the stirring pin 704 is controlled by setting data such as the initial position, the sinking depth, the traveling speed, the rotational speed, the end position, etc. of the stirring pin 704; in the advancing process of the stirring pin part 704, as the surface of the stirring pin is provided with threads, the materials are sucked upwards and accumulated on the top of the plate, and meanwhile, a tunnel is formed in the advancing direction of the stirring pin part 704 in the plate, and the tunnel can be used for introducing cooling liquid such as water to perform stable and efficient heat dissipation on the part to be cooled; when the friction stir highly continuously variable tunnel molding is performed, the traveling state of the pin portion 704 is controlled by setting data such as the initial position, the sinking depth, the traveling speed, the rotational speed, the end position, etc. of the pin portion 704; in addition, the height of the stirring pin portion 704 can be actively adjusted in the advancing process of the stirring pin portion 704 to enable the lower rotating body 7, the switching portion 5 and the upper rotating body 1 to move up and down together, and meanwhile, as the disc spring portion 3 has elasticity, the disc spring portion 3 drives the positioning portion 4 and the shaft shoulder portion 6 to be free of longitudinal movement relative to the surface of the plate, namely the lower surface of the shaft shoulder portion 6 always clings to the surface of the plate, and the stirring pin portion 704 can move up and down, so that the tunnel with continuously variable height and stable forming can be prepared.
The bottom of the shaft shoulder 6 is provided with a round angle, so that the shaft shoulder can smoothly float up and down when encountering accumulated materials in the travelling process, and the problem of unstable formation of a friction stir crossed tunnel is avoided; the center of the round truncated cone at the bottom of the shaft shoulder part 6 is provided with a square hole 60301, the side length of the square hole 60301 is 5-15mm, and the square hole and the lower rotating body 7 form clearance fit, so that the shaft shoulder part 6 and the stirring head part do not rotate relatively in the high-speed rotating and advancing process; the middle of the shaft shoulder 6 is provided with a second cylindrical hole 60201, the depth of which is appropriately deeper than the sum of the height of the middle cylinder of the lower rotating body 7 and the height of the adapter 5, is 17-50mm, and provides space for the shaft shoulder to float up and down.
Other components and connection relationships are the same as those of the first embodiment.
Seventh embodiment: referring to fig. 1 to 3, the lower rotating body 7 of the friction stir tunnel forming device according to the present embodiment is formed by sequentially and coaxially fixing a fixing portion 701, a cylindrical portion 702, a rectangular portion 703 and a stirring pin portion 704 from top to bottom, wherein the outer wall of the fixing portion 701 is provided with threads matched with a cylindrical rotating screw hole 10301, and the outer wall of the stirring pin portion 704 is provided with threads.
The cylindrical part 702 is in clearance fit with the bottom surface of the adapter part 5; the cuboid 703 is in clearance fit with the inner side of the square hole 60301 of the round-corner truncated cone 603 of the shaft shoulder 6, so that the shaft shoulder 6 and the stirring pin 704 can keep relatively static and do not rotate relatively in the high-speed rotation running process.
The outer diameter of the cylindrical part 702 is 18-42mm, the height of the cylindrical part 702 is 7.5-22mm shorter than the depth of the hollow cylindrical hole at the upper half part of the shaft shoulder part 6, so that the shaft shoulder part 6 can float up and down conveniently; the bottom surface of the cuboid 703 is square, the side length of the cuboid 703 and the inner side distance of the square hole 60301 at the lower part of the shaft shoulder part 6 is 0.1-0.2mm, clearance fit is formed, the shaft shoulder part 6 and the lower rotating body 7 are convenient to keep relatively static in the whole high-speed rotating process, the height of the cuboid 703 is 5-13mm, a gap is formed between the middle cylinder of the lower rotating body 7 and the upper surface of the round corner truncated cone at the lower part of the disc spring part 3, and the accumulated materials are convenient to float upwards together with the disc spring part 3 under pressure when the shaft shoulder part 6 runs. The lower part of the lower rotating body 7 is provided with a stirring pin part 704 with threads, the thread rotation direction of the stirring pin part 704 is the same as that of the upper part of the lower rotating body 7, and the connection looseness of the bottom of the lower rotating body 7 and the bottom of the upper rotating body 1 in the high-speed rotating process is prevented.
Other components and connection relationships are the same as those of the first or second embodiment.
Eighth embodiment: the present embodiment will be described with reference to fig. 1 to 3, in which a friction stir tunnel forming method according to the present embodiment is implemented by:
step one, fixedly connecting an upper rotating body 1 with a main shaft of mechanical processing equipment;
step two, setting the initial position, sinking depth, advancing speed, moving speed and ending position of the stirring pin part 704 of the lower rotating body 7;
starting the machining equipment to enable the stirring pin part 704 of the lower rotating body 7 to move according to the data set in the step two;
step four, sucking and accumulating the material upwards to the top of the plate material because the surface of the stirring pin part 704 is provided with threads in the advancing process of the stirring pin part 704, and forming a tunnel in the advancing direction of the stirring pin part 704 in the plate material;
and fifthly, introducing cooling liquid into the tunnel formed in the fourth step, and radiating the part to be radiated.
The machining equipment in this embodiment means machining equipment such as a friction stir welding machine, a numerically controlled milling machine, and a numerically controlled machining center.
Detailed description nine: the present embodiment will be described with reference to fig. 1 to 3, in which a friction stir tunnel forming method according to the present embodiment is implemented by:
step one, after the first friction stir tunnel forming, when the cross tunnel forming is performed again, the stirring pin part 704 moves to a preset position and sinks to a preset depth;
secondly, when the top material formed by the first friction stir tunnel is piled up in the advancing process of the cross tunnel forming, the shaft shoulder part 6 receives pressure and transmits the pressure to the disc spring part 3 when contacting with the piled up convex material in the process of rotating and advancing at high speed, so that the disc spring part 3 stretches and contracts, and the shaft shoulder part 6 stretches and contracts up and down together with the shaft shoulder part;
step three, the stirring pin part 704 fixed with the upper rotating body 1 does not float up and down, and continues to travel along the preset track, and the shaft shoulder part 6 stretches and floats up and down passively when contacting with and separating from the stacked materials respectively, so that the problem of unstable cross tunnel formation caused by direct large-area interference contact of the shaft shoulder part 6 and the stacked materials is avoided.
Detailed description ten: the present embodiment will be described with reference to fig. 1 to 3, in which a friction stir tunnel forming method according to the present embodiment is implemented by:
step one, setting an initial position, a sinking depth, a travelling speed, a rotating speed and a final position of the stirring pin part 704;
step two, the height of the stirring pin 704 is adjusted in the process of advancing the stirring pin 704, so that the lower rotating body 7, the switching part 5 and the upper rotating body 1 move up and down together;
step three, because the disc spring part 3 has elasticity, the disc spring part 3 drives the positioning part 4 and the shaft shoulder part 6 to do not longitudinally move relative to the surface of the plate, namely the lower surface of the shaft shoulder part 6 is always attached to the surface of the plate, and the stirring pin part 704 actively moves up and down, so that the tunnel with continuously variable height and stable forming can be prepared.
Principle of operation
After the first friction stir tunnel forming is carried out, when the cross tunnel forming is carried out again, the stirring head moves to a preset position and sinks to a preset depth, when the top material of the first friction stir tunnel forming is piled up in the advancing process of the cross tunnel forming, the shaft shoulder part receives pressure and transmits the pressure to the disc spring part when contacting with the piled up convex material in the high-speed rotation and advancing process, so that the disc spring part stretches and contracts, and the shaft shoulder part and the disc spring part stretch and retract up and down together. Meanwhile, the stirring pin fixed with the upper rotating body cannot float up and down, continuously moves along the preset track, and the shaft shoulder passively stretches and floats up and down respectively when contacting with and separating from the stacked materials, so that the problem of unstable cross tunnel forming caused by direct large-area interference contact between the shaft shoulder and the stacked materials is avoided.
The present invention is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other embodiments, such as those described above, of making various modifications and equivalents will fall within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a friction stir tunnel forming device which characterized in that: the friction stir tunnel forming device comprises an upper rotating body (1), a transition part (2), a disc spring part (3), a positioning part (4), a switching part (5), a shaft shoulder part (6) and a lower rotating body (7); the positioning part (4) consists of a circular lower clamping part (401), the lower surface of the lower clamping part (401) is provided with at least one group of second screw holes (402) which are arranged in a central symmetry manner, the second screw holes (402) are used for inserting screws and fixedly connecting with the upper surface of the shaft shoulder part (6), and the disc spring part (3) is clamped between the upper surface of the lower clamping part (401) and the lower surface of the upper clamping part (102); the transition part (2) is coaxially sleeved at the lower part of the upper rotating body (1), the disc spring part (3) and the positioning part (4) are sequentially coaxially sleeved at the outer side of the transition part (2) from top to bottom, the upper surface of the shaft shoulder part (6) is fixedly connected with the lower surface of the positioning part (4), the upper part of the lower rotating body (7) passes through the shaft shoulder part (6) from bottom to top and then is coaxially inserted into the lower end of the upper rotating body (1), the switching part (5) is coaxially sleeved at the upper part of the lower rotating body (7), and the switching part (5) is positioned in the upper part of the shaft shoulder part (6); the shaft shoulder part (6) comprises a round platform part (602) and a round corner round platform part (603); the round platform part (602) and the round-corner round platform part (603) are fixedly connected into a whole from top to bottom, a second cylindrical hole (60201) is formed in the center of the upper surface of the round platform part (602), a square hole (60301) is formed in the center of the lower surface of the round-corner round platform part (603), and the square hole (60301) is coaxial and communicated with the second cylindrical hole (60201); the upper surface of the round platform part (602) is provided with a fourth screw hole (601), and the fourth screw hole (601) is fixedly connected with the second screw hole (402) through a screw; the second cylindrical hole (60201) is in clearance fit with the outer side of the cylindrical part (702) of the lower rotating body (7); the square hole (60301) is in clearance fit with the outer side of the cuboid part (703) of the lower rotating body (7); the center of the round truncated cone at the bottom of the shaft shoulder part (6) is provided with a square hole (60301), the side length of the square hole (60301) is 5-15mm, and the square hole and the lower rotating body (7) form clearance fit; the middle of the shaft shoulder part (6) is provided with a second cylindrical hole (60201), and the depth is appropriately deeper than the sum of the height of the middle cylinder of the lower rotating body (7) and the height of the switching part (5), and is 17-50mm.
2. A friction stir tunnel forming apparatus according to claim 1 wherein: the upper rotating body (1) is formed by coaxially and fixedly connecting a clamping handle (101), an upper clamping part (102) and a fixing part (103) from top to bottom in sequence, and a cylindrical rotating screw hole (10301) for connecting with the lower rotating body (7) is arranged on the lower end surface of the fixing part (103).
3. A friction stir tunnel forming apparatus according to claim 1 wherein: the transition part (2) is a prism with a regular polygon cross section, a first cylindrical hole (201) penetrating up and down is formed in the lower end face of the transition part (2), at least one group of first screw holes (202) which are arranged in a central symmetry mode are formed in the lower end face of the transition part (2), and the first screw holes (202) are used for inserting screws and are fixedly connected with the switching part (5) in a coaxial mode.
4. A friction stir tunnel forming apparatus according to claim 1 wherein: the middle part of switching portion (5) is equipped with through-hole (501) that supplies lower rotator (7) upper portion to pass usefulness, and the upper surface of switching portion (5) is equipped with at least one set of third screw (502) that are the central symmetry setting, and third screw (502) are used for inserting screw and transition portion (2) fixed connection.
5. A friction stir tunnel forming apparatus according to claim 1 or 2 wherein: the lower rotator (7) is composed of a fixing part (701), a cylindrical part (702), a cuboid part (703) and a stirring needle part (704) which are sequentially and coaxially fixedly connected from top to bottom, threads matched with cylindrical rotary screw holes (10301) are formed on the outer wall of the fixing part (701), and threads are formed on the outer wall of the stirring needle part (704).
6. A method of using the forming apparatus of claim 1 to effect friction stir tunnel forming, comprising: the friction stir tunnel forming method is realized through the following steps:
step one, fixedly connecting an upper rotating body (1) with a main shaft of mechanical processing equipment;
setting an initial position, a sinking depth, a travelling speed, a moving speed and a final position of a stirring pin part (704) of the lower rotating body (7);
starting the machining equipment to enable the stirring pin part (704) of the lower rotating body (7) to move according to the data set in the step two;
step four, sucking and accumulating materials upwards to the top of the plate material in the running process of the stirring pin part (704) because the surface of the stirring pin part (704) is provided with threads, and forming a tunnel in the running direction of the stirring pin part (704) in the plate material;
and fifthly, introducing cooling liquid into the tunnel formed in the fourth step, and radiating the part to be radiated.
7. A method of using the forming apparatus of claim 1 to effect friction stir tunnel forming, comprising: the friction stir tunnel forming method is realized through the following steps:
step one, after the first friction stir tunnel forming, when the cross tunnel forming is performed again, the stirring pin part (704) moves to a preset position and sinks to the preset depth;
secondly, when the top material formed by the first friction stir tunnel is piled up in the advancing process of the cross tunnel forming, the shaft shoulder part (6) receives pressure when contacting with piled up convex materials in the high-speed rotating and advancing process and transmits the pressure to the disc spring part (3), so that the disc spring part (3) stretches and contracts, and the shaft shoulder part (6) stretches and contracts up and down together with the shaft shoulder part;
step three, the stirring pin part (704) fixed with the upper rotating body (1) does not float up and down, and continuously moves along the preset track, and the shaft shoulder part (6) stretches and floats up and down passively when contacting with and separating from the stacked materials respectively, so that the problem of unstable cross tunnel forming caused by direct large-area interference contact of the shaft shoulder part (6) and the stacked materials is avoided.
8. A method of using the forming apparatus of claim 1 to effect friction stir tunnel forming, comprising: the friction stir tunnel forming method is realized through the following steps:
setting an initial position, a sinking depth, a travelling speed, a rotating speed and a final position of a stirring pin part (704);
step two, the lower rotating body (7), the switching part (5) and the upper rotating body (1) move up and down together by adjusting the height of the stirring pin part (704) in the advancing process of the stirring pin part (704);
step three, because the disc spring part (3) has elasticity, the disc spring part (3) drives the positioning part (4) and the shaft shoulder part (6) to do not longitudinally move relative to the surface of the plate, namely the lower surface of the shaft shoulder part (6) is always attached to the surface of the plate, and the stirring pin part (704) actively moves up and down, so that the tunnel with continuously variable height and stable forming can be prepared.
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