CN111842849B - Workpiece processing die, workpiece processing method and pipe embedding structure - Google Patents
Workpiece processing die, workpiece processing method and pipe embedding structure Download PDFInfo
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- CN111842849B CN111842849B CN201910363848.3A CN201910363848A CN111842849B CN 111842849 B CN111842849 B CN 111842849B CN 201910363848 A CN201910363848 A CN 201910363848A CN 111842849 B CN111842849 B CN 111842849B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a workpiece processing die, a workpiece processing method and a pipe embedding structure, aiming at realizing the accurate positioning of different pipelines during pipe embedding manufacturing and improving the manufacturing capability and application range of the pipe embedding. Specifically, a workpiece processing die is manufactured firstly and comprises an upper die, a lower die and a positioning device, wherein the positioning device comprises an upper positioning structure and/or a lower positioning structure; then, executing a die assembly process, embedding the pipeline between the upper die and the lower die, and positioning and fixing the pipeline by using the upper positioning structure and/or the lower positioning structure; finally, executing a preset treatment process, such as local hot melting by using a mold material, or metal mold casting or sand mold casting and the like, so as to obtain a buried pipe structure; the positioning effect is good, the positioning precision is high, the positioning of various pipelines can be realized, and the problem that the existing special-shaped pipeline or large-width pipeline is difficult to position is solved.
Description
Technical Field
The invention relates to the technical field of semiconductors, in particular to a workpiece processing die, a workpiece processing method and a pipe burying structure.
Background
For the water cooling or air cooling requirement in engineering application, a metal thin-wall part with a pipeline inside needs to be manufactured. The embedded pipe part is internally communicated with water or air to form heat exchange with the outside so as to achieve the purpose of cooling.
In order to achieve good heat dissipation, the outer wall of the pipe-embedded part needs to be as thin as possible on the premise of meeting the strength requirement, and the inner wall of the pipe-embedded part needs to be in contact with water or gas, so that the inner wall pipeline material has certain limitation, but a metal cold plate with high heat conductivity, such as an aluminum or copper cold plate, is often needed in engineering. Although the aluminum or copper cold plate has good heat conduction effect, electrochemical corrosion may occur during the water cooling process. For this reason, engineering also uses stainless steel cold plates, which have a strong corrosion resistance but a far lower thermal conductivity than aluminum or copper.
Therefore, a metal cold plate having both thermal conductivity and corrosion resistance has become a current trend. However, the existing mature cold plate manufacturing process has the problems of thick gaps between pipes, high process difficulty, low yield, loose fit between a matrix and the pipelines and the like, and the metal pipes which can be buried inside are limited, so that the manufacturing capability and the application range of pipe-buried parts are greatly limited.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a method for machining a workpiece, which is intended to manufacture a buried pipe structure that can satisfy both corrosion resistance and thermal conductivity, thereby satisfying the requirements of water cooling or air cooling.
Another object of the present invention is to provide a method for machining a workpiece, which is to simplify the manufacturing process of the buried pipe and reduce the manufacturing cost.
The invention further aims to provide a workpiece processing method, which aims to realize the processing and the manufacturing of the thin-wall buried pipe and reduce the rejection rate of the manufacturing of the thin-wall buried pipe.
The invention also aims to provide a buried pipe structure prepared by the workpiece processing method, which can reduce the rejection rate of the buried pipe structure during processing and improve the cooling and corrosion resistance of the buried pipe structure.
In order to achieve the above object, the present invention provides a workpiece processing method comprising:
manufacturing an upper die, a lower die and a positioning device, wherein the positioning device comprises an upper positioning structure and/or a lower positioning structure, the upper positioning structure is formed on the upper die, the lower positioning structure is formed on the lower die, and the shape of the upper positioning structure and/or the lower positioning structure is consistent with the shape of a pipeline;
performing a die assembly process, embedding a pipeline between the upper die and the lower die, and positioning and fixing the pipeline by using the upper positioning structure and/or the lower positioning structure;
and executing a preset processing technology to obtain a buried pipe structure.
In one embodiment, the positioning device comprises an upper positioning structure and a lower positioning structure, the upper positioning structure is an upper positioning groove formed in the upper die, the lower positioning structure is a lower positioning groove formed in the lower die, and the shape enclosed by the upper positioning groove and the lower positioning groove is consistent with the shape of the pipeline;
the step of executing the mold closing process comprises the following steps: embedding the pipeline between the upper die and the lower die, and simultaneously positioning and fixing the pipeline by using the upper positioning groove and the lower positioning groove;
the step of performing a predetermined treatment process includes: and performing a heating process to heat the pipeline so that the pipeline melts the materials of the upper die and the lower die around the pipeline, and the upper die, the lower die and the pipeline are jointed to obtain a buried pipe structure.
Optionally, when the mold closing process is executed, the upper mold and the lower mold are mechanically fixed; or, after the upper die, the lower die and the pipeline are jointed, the mechanical fixing of the upper die and the lower die is further included.
Optionally, the heating process is performed first, and then the mold closing process is performed.
Optionally, the step of performing the heating process first and then performing the mold closing process includes:
before the die is closed, the pipeline is heated to a target temperature, and the target temperature is higher than the melting points of the upper die and the lower die and lower than the melting point of the pipeline;
and then, positioning and fixing the heated pipeline between the upper die and the lower die to carry out die assembly, thereby obtaining the buried pipe structure.
Optionally, before die assembly, the upper die and the lower die are preheated, and the preheating temperature is lower than the melting points of the upper die and the lower die.
Optionally, the mold closing process is performed first, and then the heating process is performed.
Optionally, the step of performing the heating process comprises:
after the die is closed, independently heating the pipeline to a target temperature, wherein the target temperature is higher than the melting points of the upper die and the lower die and lower than the melting point of the pipeline;
the line is then maintained at the target temperature and heating is stopped after a period of time has elapsed.
Optionally, the step of separately heating the pipeline to a target temperature includes:
heating the pipeline to enable the temperature of the pipeline, the upper die and the lower die to reach a first target temperature, wherein the first target temperature is lower than the melting points of the upper die and the lower die;
the pipe is then rapidly heated to a second target temperature that is higher than the melting points of the upper and lower dies and lower than the melting point of the pipe.
In another embodiment, the positioning device comprises an upper positioning structure and a lower positioning structure; the upper positioning structure comprises a plurality of upper positioning columns, the upper positioning columns are distributed along the pipeline on one side of the pipeline, and the distribution shape of the upper positioning columns is consistent with that of the pipeline; the lower positioning structure comprises a plurality of lower positioning columns, the lower positioning columns are distributed along the pipeline on the other side of the pipeline, and the distribution shape of the lower positioning columns is consistent with that of the pipeline; the positions and the number of the lower positioning columns correspond to those of the upper positioning columns;
when the upper die and the lower die are manufactured, a lower groove is manufactured on the lower die, an upper groove is manufactured on the upper die, and the shape enclosed by the upper groove and the lower groove is consistent with the shape of the pipeline;
the step of executing the mold closing process comprises the following steps: embedding the pipeline between the upper die and the lower die, and simultaneously pre-positioning the pipeline by using the upper groove and the lower groove; then, the pipelines are respectively pressed and fixed from two sides by utilizing the lower positioning columns and the upper positioning columns to obtain a workpiece;
the step of performing a predetermined treatment process includes:
and executing a metal mold casting process, and heating the workpiece to obtain a buried pipe structure.
Optionally, when the upper die and the lower die are manufactured, the method further includes: manufacturing an upper die into an upper die body and an upper metal mold, and manufacturing a lower die into a lower die body and a lower metal mold;
the step of executing the mold closing process comprises the following steps:
firstly, a first die closing process is executed, the pipeline is embedded between the upper die body and the lower die body, and the pipeline is pre-positioned by utilizing the upper groove and the lower groove to obtain a first workpiece;
then, executing a second mold closing process, embedding the first workpiece between the upper metal mold and the lower metal mold, and obtaining a second workpiece;
then, executing a positioning process, enabling the lower positioning columns to sequentially penetrate through the lower metal mold and the lower mold body and then to be in contact with the bottom of the pipeline, and enabling the upper positioning columns to sequentially penetrate through the upper metal mold and the upper mold body and then to be in contact with the top of the pipeline, so as to obtain a third workpiece;
and when the metal mold casting process is executed, the third workpiece is heated, so that the upper die body and the lower die body are completely melted, and the buried pipe structure is obtained.
Optionally, when the second mold closing process is performed, the upper metal mold and the lower metal mold are butted by using a mold closing device.
In other embodiments, the positioning device comprises a lower positioning structure, the lower positioning structure comprises a plurality of lower positioning clamps, and the lower positioning clamps are distributed along the pipeline on one side of the pipeline and are distributed in the shape consistent with the shape of the pipeline; the step of executing the mold closing process comprises the following steps:
embedding the pipeline between the upper die and the lower die, and clamping and fixing the pipeline from one side by using a plurality of lower positioning clamps to obtain a workpiece;
the step of performing a predetermined treatment process includes:
and (4) performing a sand casting process, and casting molten metal on the workpiece to obtain a buried pipe structure.
Optionally, when making the upper die and the lower die, the method further comprises: manufacturing an upper die into a sand mold, manufacturing a lower die into a lower die body and a lower metal mold, wherein the lower die body is also the sand mold;
when the die assembly process is executed, the lower die body is firstly placed on the lower metal mold, and the lower positioning clamps penetrate through the lower die body and enter a cavity of the lower die body;
then, placing the pipeline on a plurality of lower positioning clamps for clamping and fixing so as to be positioned in the cavity;
and then butting the upper die body and the lower die body to realize die assembly, thereby obtaining the workpiece.
Furthermore, the invention also provides a buried pipe structure which is prepared by adopting the workpiece processing method of any one of the above parts.
Optionally, the pipe burying structure comprises a base body and a pipeline buried in the base body, the pipeline is made of stainless steel, and the base body is made of aluminum alloy.
The invention further provides a workpiece processing die which comprises an upper die, a lower die and a positioning device, wherein the positioning device comprises an upper positioning structure and/or a lower positioning structure, the upper positioning structure is arranged on the upper die, the lower positioning structure is arranged on the lower die, the shape of the upper positioning structure and/or the lower positioning structure is consistent with the shape of a pipeline, and the pipeline is positioned and fixed between the upper die and the lower die through the upper positioning structure and/or the lower positioning structure.
Optionally, in the workpiece processing mold, the positioning device includes an upper positioning structure and a lower positioning structure, the upper positioning structure is formed in the upper positioning groove of the upper mold, the lower positioning structure is formed in the lower positioning groove of the lower mold, and the shape enclosed by the upper positioning groove and the lower positioning groove is consistent with the shape of the pipeline.
Optionally, the workpiece processing mold further comprises a fixing device for mechanically connecting the upper mold and the lower mold.
Optionally, the workpiece processing mold further comprises a heating device for heating the pipeline.
Optionally, in the workpiece processing mold, the positioning device includes an upper positioning structure and a lower positioning structure, the upper positioning structure includes a plurality of upper positioning pillars, the plurality of upper positioning pillars are distributed along the pipeline on one side of the pipeline, and the distribution shape of the plurality of upper positioning pillars is consistent with the shape of the pipeline, the lower positioning structure includes a plurality of lower positioning pillars, the plurality of lower positioning pillars are distributed along the pipeline on the other side of the pipeline, and the distribution shape of the plurality of lower positioning pillars is consistent with the shape of the pipeline, and the positions and the numbers of the lower positioning pillars and the upper positioning pillars correspond to each other;
the upper positioning columns are used for penetrating through the upper die and pressing one side of the pipeline, and the lower positioning columns are used for penetrating through the lower die and pressing the other side of the pipeline.
Optionally, in the workpiece processing mold, the upper mold includes an upper mold body and an upper metal mold, the lower mold includes a lower mold body and a lower metal mold, the upper mold body, the lower mold body and the lower metal mold are arranged in sequence, and the pipeline is positioned between the upper mold body and the lower mold body;
the upper positioning columns are connected with the upper metal mold and penetrate through the upper mold body to be contacted with the top of the pipeline, and the lower positioning columns are connected with the lower metal mold and penetrate through the lower mold body to be contacted with the bottom of the pipeline.
Optionally, in the workpiece processing mold, the lower metal mold has a cavity, and the upper mold body, the pipeline and the lower mold body are sequentially arranged and then accommodated in the cavity;
the lower die comprises an upper die body and a lower die body, wherein a lower groove is formed on the lower die body, an upper groove is formed on the upper die body, the shape of the upper groove surrounded by the lower groove is consistent with the shape of the pipeline, and the pipeline is pre-positioned between the upper die body and the lower die body through the lower groove and the upper groove.
Optionally, in the workpiece processing mold, the positioning device includes a lower positioning structure, the lower positioning structure includes a plurality of lower positioning fixtures, and the plurality of lower positioning fixtures are distributed along the pipeline on one side of the pipeline, and the distribution shape of the lower positioning fixtures is consistent with the shape of the pipeline; the lower positioning clamps are used for passing through the lower die to clamp and fix a pipeline.
Optionally, in the workpiece processing mold, the lower mold includes a lower mold body and a lower metal mold, the lower mold body and the upper mold are sand molds, the lower mold body has a cavity, and the plurality of lower positioning fixtures are distributed in the cavity according to the shape of the pipeline.
According to the workpiece processing die, the workpiece processing method and the buried pipe structure prepared by the workpiece processing die, the pipeline is positioned between the upper die and the lower die by utilizing the upper positioning structure and/or the lower positioning structure in the positioning device, and the precise positioning of the pipelines with different shapes and sizes can be realized due to the fact that the shape of the upper positioning structure and/or the lower positioning structure is consistent with the shape of the pipeline, so that the application range of the buried pipe structure is enlarged, the manufacturing of the thin-wall buried pipe is realized through the precise positioning of the pipeline, and the manufacturing difficulty of the thin-wall buried pipe structure is reduced.
In one embodiment, the upper die, the lower die and the pipeline are jointed together by heating the pipeline, so that the base body and the pipeline are tightly attached, the cooling performance of the pipe embedding structure is improved, the base body is directly formed by using a die material, the material utilization rate is also improved, and the production cost is reduced.
In another embodiment, the buried pipe structure is obtained by executing a metal casting process, so that gaps among pipelines are small, more pipelines can be distributed in the matrix under the same area, the cooling performance of the buried pipe is further improved, the pipelines, particularly special pipes or pipes with large auxiliary surfaces, are positioned from two sides through the upper positioning columns and the lower positioning columns, the positioning precision is high, and the machining precision of buried pipe manufacturing is greatly improved.
In another embodiment, the buried pipe structure is obtained by performing a sand casting process, so that the process is simple, the processing cost is low, sand casting of the special pipe or the large-minor-surface pipe is easy to realize, and the capacity and the application range of sand casting the buried pipe are greatly improved.
Drawings
The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:
fig. 1 is a schematic structural view of a conventional special-shaped pipe;
FIG. 2a is an exploded view of a workpiece processing die according to one embodiment of the present invention;
FIG. 2b is an assembled schematic view of the workpiece processing die of FIG. 2 a;
FIG. 3a is an exploded view of a workpiece processing mold according to a second embodiment of the present invention;
FIG. 3b is an assembled schematic view of the workpiece processing die of FIG. 3 a;
FIG. 3c is a schematic diagram of positioning a pipeline according to a second embodiment of the present invention;
FIG. 4a is an exploded view of a workpiece-processing die according to a third embodiment of the present invention;
FIG. 4b is an assembled schematic view of the workpiece processing die shown in FIG. 4 a;
fig. 4c is a schematic view of clamping the pipeline from below in the third embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description. Advantages and features of the present invention will become more apparent from the following description, which is given to enable those skilled in the art to fully and effectively understand the nature of the present invention and to repeatedly implement the technical solution described above, while understanding the content of the present invention. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The term "plurality" is generally used in a sense that it includes two or more.
As background art, the existing cold plate manufacturing process has many problems, and the manufacturing capability and the application range of cold plate parts are greatly limited. Specifically, there are four main types of current cold plate manufacturing processes:
the first is machining: the flow channels are formed inside the parts mainly by machining. In the method, the process hole or the process groove is firstly needed to be arranged on the part, and then the cutter is stretched into the hole groove to be hollowed to form the flow channel, so that the process is complex, the processing cost is high, the size of the process hole groove and the position where the cutter can be machined are limited, the shape of the part which can be processed is limited, the flow channel (such as an S-shaped flow channel, a U-shaped flow channel, a C-shaped flow channel and the like) which is complex in shape and free in shape can not be formed in the part, the method is not suitable for processing thin-wall parts, and the rejection rate is high. In addition, the material of the metal cold plate manufactured by machining is usually a single material (mainly stainless steel), and corrosion resistance and thermal conductivity cannot be both achieved.
The second is welding after machining. A plurality of parts with grooves on the surfaces are processed and then welded together. However, in this way, there is a risk of leakage at the welded joint, and the deformation at the welded joint is large, especially in the welding of thin-walled parts, and therefore, the rejection rate is high. In addition, the material of the metal cold plate formed in this manner is not limited to one material, and thermal conductivity and corrosion resistance cannot be simultaneously achieved.
And the third method is buried pipe sand casting. Based on the traditional sand mold casting process, the molten metal is cast after a pipeline is buried inside the mold. Although the metal cold plate with different inner and outer materials can be obtained by the method, gaps exist at the joint of the wall surfaces, so that the heat conduction is influenced. And because the metal liquid casting is limited, a large gap needs to be reserved between pipelines, and the gap between the cast pipelines is thick, so that the heat conduction capability is further reduced. And this method can not bury the elbow either because only fix at the both ends of elbow at present, and the elbow itself easily takes place to squint in the sand mould, for example takes place to squint under the impact of molten metal, thereby influences the casting precision, and applicable material is limited moreover. In addition, the pipe-laying casting also needs to consider pipe-laying positioning, and can not bury pipelines with more suspension, farther eccentricity and heavy weight, and the special pipe 10 shown in the figure 1 can not be positioned. Of course, the process is also complex, casting defects are easy to generate, and the rejection rate of products is high.
The fourth is 3D printing. 3D printing enables the fabrication of complex shaped pipelines by stacking materials layer by layer. But 3D prints applicable metallic material kind less, and 3D prints metal and can't print in the unsettled cavity structure of gravity direction under the unsupported prerequisite moreover. When a thin-walled structure of 0.3mm or less is printed, the thin-walled structure is easily deformed due to insufficient sintering, and further, the wall surface has defects such as holes or cracks. In addition, when a hole structure with the suspended diameter exceeding 8mm is printed, a metal support needs to be added, and the printing machine is not suitable for being used as a cavity part with a large pipe diameter and a large suspended surface. In addition, the 3D printing cost is high, the material is only one, the forming capability is limited, the structure is unstable, the leakage risk exists, and the application limit is large.
Based on the research, the embodiment of the invention provides a workpiece processing mold, which comprises an upper mold, a lower mold and a positioning device, wherein the positioning device comprises an upper positioning structure and/or a lower positioning structure, the upper positioning structure is arranged on the upper mold, the lower positioning structure is arranged on the lower mold, and the shape of the upper positioning structure and/or the lower positioning structure is consistent with the shape of a pipeline. Here, the form of the positioning device includes the shape and distribution: when the positioning device simultaneously comprises the upper positioning structure and the lower positioning structure, the shape enclosed by the upper positioning structure and the lower positioning structure when the die is closed is consistent with the shape of the pipeline, namely embodiment one; or when the positioning device comprises the upper positioning structure and the lower positioning structure at the same time, the distribution mode of the upper positioning structure and the lower positioning structure is consistent with the shape of the pipeline, namely the upper positioning structure and the lower positioning structure are distributed along the pipeline, namely the second embodiment and the third embodiment; or, when the positioning device only includes the upper positioning structure or the lower positioning structure, the upper positioning structure or the lower positioning structure is distributed in a manner consistent with the shape of the pipeline, that is, distributed along the pipeline, i.e., embodiment three.
The embodiment of the invention also provides a workpiece processing method, which comprises the following steps:
firstly, manufacturing the workpiece processing mould; then, executing a die assembly process, embedding the pipeline between the upper die and the lower die, and positioning and fixing the pipeline by using the upper positioning structure and/or the lower positioning structure; and finally, executing a preset treatment process to obtain the buried pipe structure.
In the embodiment of the invention, the pipeline is positioned and fixed by the positioning device according to the shape of the pipeline, so that the positioning effect is good, the positioning precision is high, and even for the special-shaped pipe or the pipe with a large minor surface shown in figure 1, the positioning and fixing can be easily and reliably carried out, so that the range of the pipe which can be embedded is wider, the application range of the embedded pipe structure is improved, and the processing precision of the embedded pipe can be effectively ensured because the pipeline can be accurately positioned, thereby being beneficial to the processing of the thin-wall embedded pipe, improving the manufacturing capability of the thin-wall embedded pipe and improving the cooling performance of the embedded pipe structure.
Furthermore, by utilizing the workpiece processing die, the embodiment of the invention respectively obtains the pipe burying structure through three manufacturing processes:
the first manufacturing process is local hot melting of a mould material, so that a buried pipe structure with an upper mould, a lower mould and a pipeline which are connected together is obtained; in the mode, the material utilization rate is high, the pipeline is tightly attached to the base body, and the cooling performance of the buried pipe structure is good;
the second manufacturing process is metal mold casting, and a metal casting with a pipeline embedded inside is obtained through melting of the upper die and the lower die; in the mode, the positioning precision of the pipes is high, the machining precision of the castings is improved, and gaps among the pipelines can be smaller, so that more pipelines can be distributed in the matrix under the same area, and the cooling performance of the buried pipe structure is improved;
the third manufacturing process is sand casting, thereby providing a pipe burying forming mode with relatively simple technological process, thereby reducing the processing cost and further improving the capacity and application range of sand casting the buried pipe.
The three manufacturing methods are further explained below with reference to the drawings.
Example one
Fig. 2a is an exploded view of a workpiece processing mold according to a first embodiment of the present invention, and fig. 2b is an assembled view of the workpiece processing mold shown in fig. 2 a.
As shown in fig. 2a and 2b, the workpiece processing mold includes an upper mold 1, a lower mold 2, a positioning device, and optionally, a fixing device 4.
The upper die 1 and the lower die 2 are made of materials with good thermal conductivity, including but not limited to metal materials such as copper, aluminum or aluminum alloy, preferably aluminum alloy, and are easy to process. The pipeline 3 is preferably a planar pipe rather than a stereo pipe, that is, all the pipe sections of the pipeline 3 are arranged in the same plane, but the shape of the pipeline 3 is not limited in particular, and may be, for example, an S-shaped pipe, a U-shaped pipe, a C-shaped pipe, or the like, or may be a single straight pipe, or a plurality of straight pipes (e.g., an F-shaped pipe). In addition, the pipe 3 is made of a material having high corrosion resistance, and preferably stainless steel having high strength and excellent corrosion resistance.
The positioning device comprises an upper positioning groove and a lower positioning groove. The upper positioning groove (not shown) is arranged on the bottom surface of the upper die 1 (namely the surface facing the lower die 2), the shape of the upper positioning groove is consistent with that of the upper half part of the pipeline 3 to be embedded, and the upper positioning groove and the pipeline 3 form clearance fit at room temperature, so that the pipeline 3 can be smoothly clamped into the upper positioning groove at room temperature. The lower positioning groove (not shown) is provided on the top surface of the lower die 2 (i.e., the surface facing the upper die 1), and has a shape corresponding to the lower half of the pipe 3, and similarly, the pipe 3 can be embedded in the lower positioning groove at room temperature. It should be understood that the upper positioning groove constitutes the upper positioning structure of the present invention, and the lower positioning groove constitutes the lower positioning structure of the present invention, so that the shape of the enclosed upper positioning groove and lower positioning groove is identical to the shape of the pipeline 3.
In practice, the upper die 1 is preferably a flat plate, but the machining method is not limited, and the upper locating groove can be formed by machining or extrusion, and can be formed by milling or laser cutting directly on the bottom surface of the upper die 1. The lower die 2 is also preferably a flat plate, and the machining method is not limited, and the lower positioning groove can also be formed directly on the top surface of the lower die 2 by milling or laser cutting. Therefore, when the upper die 1 and the lower die 2 are matched and butted, the whole pipeline 3 is embedded between the upper die 1 and the lower die 2, the pipeline 3 is positioned and fixed through the upper positioning groove and the lower positioning groove, and then the upper die 1 and the lower die 2 are mechanically fixed.
The manufacturing process of the buried pipe will be further described by taking stainless steel pipes, and aluminum alloy upper and lower dies as schematic diagrams.
In one embodiment, a workpiece processing method is provided, which specifically includes step S1, step S2, and step S3.
Step S1 is to perform a mold clamping process, load the pipeline 3 between the upper mold 1 and the lower mold 2, and position and fix the pipeline 3 by using the upper positioning groove and the lower positioning groove at the same time.
Optionally, the upper mold 1 and the lower mold 2 may be mechanically locked by the fixing device 4 during mold closing, for example, by bolts, so as to form a detachable connection. However, in other embodiments, the fixing device 4 is not used for mold clamping, and the upper mold 1 and the lower mold 2 are directly welded to form an undetachable connection, so that the connection is more reliable, and the reliability of product use can be ensured.
Step S2 is to perform a heating process to heat the pipe 3 to a target temperature higher than the melting point of the aluminum alloy but lower than the melting point of the stainless steel so that the heated pipe 3 melts the mold material around the pipe 3 to join the upper mold 1, the lower mold 2 and the pipe 3 and obtain a workpiece.
The target temperature of the pipe 3 can be controlled within the range of 900-1300 c, for example, 1000 c, at which the heat of the pipe 3 is enough to melt the surrounding upper and lower dies 1 and 2, so that the melted material is closely attached to the surface of the pipe 3 without leaving any gap.
Step S3 is to perform a cooling process, and after the workpiece in step S2 is cooled, a buried pipe structure is obtained.
The heating process may be performed first and then the mold closing process may be performed, or the mold closing process may be performed first and then the heating process may be performed.
Further, mechanical locking (including detachable or non-detachable) of the upper mold 1 and the lower mold 2 may be performed either at the time of mold clamping or after the workpiece is cooled. If the upper and lower dies are mechanically locked after the workpiece is cooled, in order to ensure that the upper die 1 and the lower die 2 do not move relatively after the die is closed, the upper die 1 and the lower die 2 can be pressed by an external mechanism, and the upper die 1 and the lower die 2 are always in butt joint without moving relatively.
Further, if the heating process is executed first and then the mold closing process is executed, the buried pipe manufacturing process specifically includes:
before the die is closed, the pipeline 3 is heated to a target temperature (higher than the melting point of the aluminum alloy but lower than the melting point of the stainless steel), for example, the pipeline 3 is separately heated and kept warm in a stainless steel heating furnace;
and then loading the heated pipeline 3 between the upper die 1 and the lower die 2 for die assembly, waiting for a period of time, and cooling the workpiece to obtain the required buried pipe.
Preferably, the upper and lower dies 1, 2 are also preheated prior to closing the dies so that the upper and lower dies 1, 2 are at a temperature close to but below the melting point of the aluminum alloy, for example 400 ℃ to 600 ℃, optionally 500 ℃ or 600 ℃. Therefore, when the mold closing process is performed, the heated pipeline 3 is loaded between the preheated upper mold 1 and the preheated lower mold 2, so that the heating efficiency is high, the material combination effect is good, and the processing quality can be effectively ensured. Optionally, the upper die 1 and the lower die 2 can be preheated and insulated in the same aluminum alloy heating furnace, and when die assembly is needed, only the pipeline 3 in the stainless steel heating furnace needs to be taken out and put into the aluminum alloy heating furnace for die assembly, so that heat loss can be effectively prevented, the processing quality is ensured, and the production efficiency is improved.
Further, if the mold closing process is executed first and then the heating process is executed, the specific heating process includes:
after die assembly, independently heating the pipeline 3 to enable the temperature of the pipeline 3 to reach a target temperature (higher than the melting point of aluminum alloy but lower than the melting point of stainless steel);
and then, after the temperature of the pipeline 3 is maintained at the target temperature for a certain time, stopping heating, and then obtaining the required buried pipe after the workpiece is cooled. Here, the pipe 3 may be directly heated by energization, or the inside of the pipe 3 may be filled with a resistance wire to be heated. Therefore, preferably, the workpiece processing mold further comprises a heating device for heating the pipeline 3, and the heating device includes, but is not limited to, a resistance wire, an electric coil, and the like.
Further, in a mode of heating the pipe line 3 after the mold closing, it is preferable that the heating mode is:
preheating the pipeline 3 to enable the temperature of the pipeline 3, the upper die 1 and the lower die 3 to reach a first target temperature (for example, 400-600 ℃), wherein the first target temperature is close to the melting point of the aluminum alloy;
and then, rapidly increasing the heating rate, rapidly heating the pipeline 3 to a second target temperature (for example, 900-1300 ℃), wherein the second temperature is higher than the melting point of the aluminum alloy, and stopping heating after keeping the temperature for a certain time. Like this sectional type heating, heating efficiency is high, and heating effect is good.
In order to further reduce the production cost, after the workpiece processing mold is manufactured, the positioning grooves on the upper mold and the lower mold are preferably used for performing a pipe bending process on the original pipe to obtain a pipe bending structure to be embedded, so that the process flow is simplified, and the processing cost is saved.
Continuing next to fig. 2a, in one embodiment, the fixture 4 includes at least three sets of fasteners, each set including a bolt and a nut. Correspondingly, the upper die 1 is provided with at least three upper interfaces 11 for fixing with the lower die 2. The lower die 2 is provided with lower interfaces 21, and the number and the position of the lower interfaces 21 are consistent with those of the upper interfaces 11. During actual locking, each bolt penetrates through the corresponding upper interface 11 and the lower interface 21 and is locked and fixed through the respective nut.
In another embodiment, each set of fasteners may also include only one bolt, and one of the upper interface 11 and the lower interface 21 is a threaded hole, and the other is a through hole, and the bolt is inserted into the through hole and then inserted into the threaded hole for locking.
It should be appreciated that the fixing device 4 locks and fixes the non-melting area of the upper die 1 and the lower die 2 through the upper interface 11 and the lower interface 21, for example, when the upper die 1 and the lower die 2 are rectangular flat plate members, the interfaces may be arranged at four corners of the flat plate members, so that the upper die 1 and the lower die 2 are locked through four sets of fasteners, and the structure is simple and the operation is convenient.
Obviously, according to the technical scheme provided by the first embodiment, when the buried pipe is manufactured, the mould material is directly used for manufacturing and forming the buried pipe structure, so that the material utilization rate is reduced, the production cost can be effectively reduced, the upper mould and the lower mould can be realized through machining, the cost is low, the technological process of buried pipe manufacturing is simple, and the processing difficulty is low. And the pipeline is closely attached to the substrate, the cooling performance is good, the heat conductivity and the corrosion resistance can be considered simultaneously by the pipe burying structure, the product performance is good, the shape of the pipe which can be buried is free, and the application range of the pipe burying structure is wide. In addition, the pipe burying structure has high positioning precision, is convenient to process and form a thin-wall pipe burying structure, improves the cooling performance of the pipe burying structure, is particularly suitable for processing and manufacturing plate-shaped pipes, and has low processing cost.
Example two
Fig. 3a is an exploded view of a workpiece processing mold according to a second embodiment of the present invention, and fig. 3b is an assembled view of the workpiece processing mold shown in fig. 3 a.
As shown in fig. 3a and 3b, the workpiece processing mold includes an upper mold 21, a lower mold 22, and a positioning device 24, and preferably further includes a mold closing device 25.
The upper die 21 includes an upper die body 211 and an upper metal mold 212. The lower die 22 includes a lower die body 221 and a lower metal mold 222. The upper die body 211 and the lower die body 221 are made of materials with good thermal conductivity, including but not limited to metals such as copper, aluminum alloy and the like, preferably aluminum alloy, and are convenient to process. The pipe 23 is preferably an elbow pipe, which may be a flat pipe or a stereo pipe, and the stereo pipe is not limited to a special pipe, such as the special pipe shown in fig. 1 or a large-sized pipe. The pipeline 23 is made of a material with good corrosion resistance, preferably stainless steel, and has high strength and good corrosion resistance.
In addition, an upper groove (not shown) having a shape identical to that of the upper half of the pipeline 23 is formed on the bottom surface of the upper die body 211 (the surface facing the lower die body 221), and the upper groove and the pipeline 23 form a clearance fit at room temperature, so that the pipeline 23 can be smoothly clamped into the upper groove. The top surface of the lower mold body 221 (the surface facing the upper mold body 211) is also formed with a lower groove (not labeled) conforming to the shape of the lower half of the pipe 23, into which the pipe 23 can be fitted at room temperature. The shape of the enclosed upper groove and the lower groove is consistent with the shape of the pipeline 23, so that the pipeline 23 is prepositioned through the upper groove and the lower groove, and the positioning precision in the machining process is ensured.
The upper mold body 211 is preferably a flat plate, and the processing method of the upper mold body 211 is not limited, and may be machining or extrusion molding, so that the upper groove can be directly machined on the plate. The lower die body 221 is also preferably a flat plate, and the lower groove may also be machined directly on the top surface of the lower die body 221.
Therefore, when the upper die body 211 and the lower die body 221 are matched and butted, the whole pipeline 23 is embedded between the upper die body 211 and the lower die body 221, and the pipeline 23 is pre-positioned by utilizing the upper groove and the lower groove simultaneously to realize subsequent matching, namely, the first matching is performed, when the second matching is performed, the upper metal mold 212 and the lower metal mold 222 are required to be matched, and the pipeline 23 is positioned from two sides of the pipeline by utilizing the positioning device 24, so that in the process of melting the two die bodies, the pipeline 23 cannot move, the positioning effect is good, the positioning precision is high and can reach 0.1mm, the pipeline positioning device is also suitable for positioning pipelines with complicated shapes and large sizes, and the range of the embedded pipes is wide.
The upper die 212 and the lower die 222 are made of metal material, but have a melting point higher than that of the die body, for example, the material may be selected from metal materials with higher melting point such as steel, copper, etc. Wherein the lower metal mold 222 has a cavity S shaped and dimensioned to fit the desired shape and dimension of the buried pipe. When the mold is actually closed, the lower mold body 221 is placed in the cavity S, the pipeline 23 is placed on the lower mold body 221, the upper mold body 211 and the lower mold body 221 are abutted and closed, and then the upper metal mold 212 and the lower metal mold 222 are abutted and closed. When the two models are butted, the upper metal mold 212 can be pressed on the lower metal mold 222 by the cooperation of the mold closing device 25 and the upper metal mold 212. The mold close means 25 are well known in the art and therefore will not be described in detail herein.
The positioning device 24 includes an upper positioning structure and a lower positioning structure, the upper positioning structure includes a plurality of upper positioning columns 241, the lower positioning structure includes a plurality of lower positioning columns (not shown), and these upper positioning columns 241 and lower positioning columns form a set, each set includes an upper positioning column 241 and a lower positioning column, the upper positioning column 241 in the same set is used for positioning the pipeline 23 at the top of the pipeline 23, and the lower positioning column in the same set is used for positioning the pipeline 23 at the bottom of the pipeline 23 and at the same position, that is, positioning the same position on the pipeline from the upper and lower sides, then, each set of positioning structures is positioned from the upper and lower sides at different positions of the pipeline 23, so that the positioning precision is high, which can reach 0.1mm, and therefore, the positioning effect is good. Of course, the plurality of upper positioning pillars 241 are distributed along the pipeline 23 at the top of the pipeline and have a distribution shape consistent with the shape of the pipeline 23, the plurality of lower positioning pillars are distributed along the pipeline 23 at the bottom of the pipeline 23 and have a distribution shape consistent with the shape of the pipeline 23, and the number and the positions of the upper positioning pillars and the lower positioning pillars correspond to each other one to one. However, the number of the positioning structures is not limited in the present invention, and is configured mainly according to the shape and size of the pipe to be embedded, for example, for the profile pipe shown in fig. 1, at least three sets of positioning structures may be arranged on each rotating ring, and the specific arrangement positions are set according to the actual requirement.
Correspondingly, the upper metal mold 212 and the upper mold body 211 are formed with upper positioning holes (not labeled) for allowing the upper positioning posts 241 to pass through, and the distribution of the upper positioning holes on these components conforms to the shape of the pipeline 23, such as spiral distribution. The lower metal mold 222 and the lower mold body 221 are formed with lower positioning holes (not labeled) allowing the lower positioning posts to pass through, and the lower positioning holes are consistent in position and number with the upper positioning holes, so that the distribution also conforms to the shape of the pipeline 23.
It should be understood that the lower positioning hole of the lower mold body 221 is formed in the lower groove, and the upper positioning hole of the upper mold body 211 is formed in the upper groove, but in other embodiments, the upper mold body 211 may not be formed with the upper groove, and the pipeline 23 may be disposed only through the lower groove. In addition, in the case of the profile tube 10 shown in fig. 1, both ends of the tube extend downward, and for this purpose, two through holes are further formed in the lower die body 221 and the lower die 222, and the through holes allow both ends of the tube 23 extending downward to pass therethrough to protrude outward.
The manufacturing process of the buried pipe will be further described by taking stainless steel pipes, and aluminum alloy upper and lower dies as schematic diagrams.
In an embodiment of the present invention, a workpiece processing method is provided, which specifically includes step S11, step S12, step S13, and step S14, and preferably further includes step S15.
Step 12 is to perform a second mold clamping process, and load the first workpiece in step 11 between the upper metal mold 212 and the lower metal mold 222 to obtain a second workpiece. In the step, the existing mold assembling device 25 can be used for realizing the butt joint of the upper metal mold 212 and the lower metal mold 222, and the operation is more convenient.
Step 13 is to perform a positioning process, so that the positioning device 24 positions the pipeline 23 of the second workpiece from two sides of the pipeline 23, respectively, and obtain a third workpiece.
Specifically, the upper positioning columns 241 are sequentially inserted into the upper metal mold 212 and the upper mold body 211 and then are contacted and pre-tightened with the top of the pipeline 23, and the lower positioning columns 2412 are sequentially inserted into the lower metal mold 222 and the lower mold body 221 and then are contacted and pre-tightened with the bottom of the pipeline 23, so that the pipeline 23 is positioned from the upper direction and the lower direction, the positioning reliability is high, and the positioning accuracy is good.
Alternatively, the upper positioning holes of the upper metal mold 212 are configured as threaded holes for threaded connection with the upper positioning posts 241, while the upper positioning holes of the upper mold body 211 are configured as through holes for allowing the upper positioning posts 241 to pass through. Similarly, the lower positioning hole of the lower metal mold 222 is also configured as a threaded hole for threaded connection with the lower positioning post, while the lower positioning hole of the lower mold body 221 is configured as a through hole for allowing the lower positioning post to pass through.
As shown in fig. 3c, the upper positioning post 241 applies a pressure F1 to the pipeline 23 from the top of the pipeline 23, and the lower positioning post applies a pressure F2 to the pipeline 23 from the bottom of the pipeline 23, so that the pipeline 23 is positioned and fixed from both sides of the pipeline 23, the pipeline 23 is not displaced during manufacturing, and the positioning is performed according to the shape of the pipeline, and the positioning accuracy is high.
Step 14 is to perform a metal mold casting process, and heat the third workpiece entirely to completely melt the upper and lower die bodies 211 and 221, thereby obtaining a metal casting.
The heating temperature (such as 700-800 ℃) of the third workpiece is higher than the melting point of the aluminum alloy and lower than the melting point of the stainless steel, certainly lower than the melting points of the upper metal mold, the lower metal mold and other parts, and the third workpiece can be kept warm for a certain time (for example, 2 hours) after reaching the preset temperature until the upper mold body and the lower mold body are completely melted, and then is cooled and solidified.
Finally, step 15 is to perform the mold opening process, which is an optional option, i.e., the upper and lower metal molds and the positioning device 24 are removed to obtain the buried pipe structure. However, if necessary, the upper and lower molds and the positioning device may be retained on the metal casting as a part of the pipe laying, and in this case, the upper and lower molds are preferably made of copper so as to ensure the heat conduction performance of the pipe laying. In addition, if the upper and lower metal molds and the positioning device are taken away, the positioning holes are reserved in the forming process of the metal casting, so that repair welding treatment needs to be carried out on the positioning holes.
Similar to the embodiment, it is preferable to perform a pipe bending process on the original pipe by using the grooves on the upper and lower dies to obtain a pipe bending structure to be embedded, so as to simplify the process flow and save the processing cost.
Further, the workpiece processing mold further comprises a positioning mechanism for positioning the relative positions of the upper mold body 211 and the lower mold body 221 during the first mold closing. Optionally, two positioning pins (not labeled) are symmetrically arranged on the bottom surface of the upper die body 211, and two positioning through holes are symmetrically arranged on the lower die body 221, so that when the die is closed for the first time, the two positioning pins are respectively inserted into the corresponding positioning through holes to realize the butt joint of the two die bodies. Optionally, the workpiece processing mold further includes another positioning mechanism for positioning the relative positions of the lower mold body 221 and the lower metal mold 222, for example, two positioning protrusions are formed on the bottom surface of the lower mold body 221, preferably, the two positioning protrusions are formed at through holes on the lower mold body 221 for allowing the two ends of the pipeline 23 to pass through, and simultaneously, through holes for allowing the two positioning protrusions to be inserted are formed on the lower metal mold 222.
In summary, in the technical solution provided in the second embodiment, a metal mold casting technology is used to process a buried pipe structure, which not only has high material utilization rate, but also has simple process and high casting precision. Particularly, based on the metal mold casting process, the gaps among the pipelines in the buried pipe can be smaller, more pipelines can be arranged in the same area, and the density of the pipe arrangement can be more compact. And the shape of the pipeline in the buried pipe is not limited, and the pipeline can be a special pipe or a pipe with a large minor surface, so that the application range of the buried pipe structure is greatly expanded. And the positioning precision of the pipe is high, and the pipe is easier to process into a thin-wall type pipe embedding structure, so that the manufacturing difficulty of the thin-wall pipe embedding structure is reduced.
EXAMPLE III
Fig. 4a is an exploded view of a workpiece processing mold according to a third embodiment of the present invention, fig. 4b is an assembled view of the workpiece processing mold shown in fig. 4a, and fig. 4c is a view illustrating clamping of a pipe from below according to the third embodiment of the present invention.
As shown in fig. 4a and 4b, the workpiece processing mold includes an upper mold 31, a lower mold, and a positioning device 34. Wherein, the lower die comprises a lower die body 321 and a lower metal mold 322.
The upper mold 31 and the lower mold body 321 are both sand molds, and can be manufactured by 3D printing. The lower metal mold 322 is made of metal material, such as steel or copper.
The positioning device 34 includes a lower positioning structure, which includes a plurality of lower positioning clamps 341, the plurality of lower positioning clamps 341 are distributed along the pipeline 33 at the bottom of the pipeline 33 and the distribution shape is consistent with the shape of the pipeline 33, but the number of the lower positioning clamps 341 is not specifically limited and is mainly configured according to the shape and size of the pipe to be buried, for example, for the special pipe shown in fig. 1, at least three lower positioning clamps 341 may be arranged on each rotating ring, and the specific arrangement position is set according to the actual requirement. The lower positioning clamps 341 are arranged below the pipeline 33 to clamp the pipeline 33, so that the pipeline cannot shift in the subsequent casting process, and the distribution of the lower positioning clamps 341 corresponds to the shape of the pipeline 33, and the lower positioning clamps can be clamped at different positions, so that even for special-shaped pipes, accurate positioning can be realized, the special-shaped pipes can be easily machined into thin-wall parts, the special-shaped pipes are suitable for being embedded into pipelines with more suspension, farther eccentricity and heavy weight, and the process is simple.
Correspondingly, a plurality of lower positioning holes (not labeled) are formed on the lower die body 321 for allowing the lower positioning jig 341 to pass through, and the distribution of the lower positioning holes also conforms to the shape of the pipeline 33. The lower die body 321 has a cavity S, and all the positioning jigs 341 are distributed in the cavity S in a manner (the distribution manner conforms to the shape of the conduit 33) to effectively clamp the conduit 33. In actual operation, the positioning fixture 341 is first arranged on the lower metal mold 332, then the lower mold body 321 is arranged on the lower metal mold 332, the positioning fixture 341 penetrates through the positioning hole on the lower mold body 321 to be distributed in the cavity S, then the pipeline 33 is arranged on the positioning fixture 341 to be clamped, finally, the mold closing process is executed, the upper mold 31 and the lower mold are butted, and the mold closing can be realized through the mold closing device 35.
In addition, the lower positioning fixture 341 may be detachably or non-detachably disposed on the lower metal mold 322, where the detachable manner may be a screw fit connection or an interference fit connection, and the non-detachable manner may be a welding, an adhesion, a riveting, and the like, and the connection manner is not limited in the present invention. The lower positioning jig 341 is provided with a groove capable of accommodating the pipeline 33, but the shape of the groove is not limited, and the groove may be V-shaped, U-shaped, or arc-shaped, and may also be an elastic groove.
The manufacturing process of the buried pipe structure is schematically illustrated by stainless steel pipelines and aluminum alloy casting, and specifically comprises the following steps:
And step 22, performing a casting process, namely injecting aluminum liquid into the sand mold of the workpiece to obtain a sand mold casting, and opening the mold after the sand mold casting is cooled.
In the second embodiment, the lower metal mold 322 and the positioning device 34 may be retained on the sand mold casting, or removed and not retained, and if removed and not retained, the repair welding is performed at the positioning through hole.
However, in this embodiment, an upper positioning jig may be further provided, in which case, the upper mold 31 includes an upper mold body and an upper metal mold, the upper mold body is a sand mold, and the upper metal mold is a metal mold, so that the upper metal mold, the upper mold body, the lower mold body, and the lower metal are sequentially arranged and then are closed, and the pipeline 33 is buried between the upper mold body and the lower mold body. Similar to the above, the upper positioning fixture is disposed on the upper metal mold and passes through the upper mold body to clamp the pipeline, and the clamping position is different from the clamping position of the lower positioning fixture to prevent the two from generating structural interference.
In the technical scheme provided by the third embodiment, compared with the existing sand casting of the buried pipe, the pipe bending machine can embed the bent pipe in the sand mould through the positioning clamp, the accurate positioning of the bent pipe is realized, the bent pipe is not limited by factors such as suspension, eccentricity and weight, the manufacturing capability and the application range of the sand casting buried pipe are greatly improved, the technological process is simple, and the processing cost is low.
In other embodiments, only the upper positioning jig may be provided, and the plurality of upper positioning jigs may clamp and fix the pipe from above,
example four
The embodiment also provides a pipe burying structure, which can be prepared by the workpiece processing method in any one of the first embodiment to the third embodiment. The resulting buried pipe structure may include a substrate made of a material with good thermal conductivity, including but not limited to copper or aluminum, and a pipe embedded in the substrate made of a material with good corrosion resistance, including but not limited to stainless steel. Therefore, the buried pipe structure of the embodiment can give consideration to both heat conductivity and corrosion resistance, and has good use performance, thin wall and good cooling performance.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A method of machining a workpiece, comprising:
manufacturing an upper die, a lower die and a positioning device, wherein the positioning device comprises an upper positioning structure and a lower positioning structure, the upper positioning structure is formed on the upper die, the lower positioning structure is formed on the lower die, the shape of the upper positioning structure is consistent with the shape of the upper half part of a pipeline, the shape of the lower positioning structure is consistent with the shape of the lower half part of the pipeline, the upper die, the lower die and the pipeline are made of metal materials, and the melting points of the upper die and the lower die are lower than the melting point of the pipeline;
performing a die assembly process, embedding the pipeline between the upper die and the lower die, and positioning and fixing the pipeline by using the upper positioning structure and the lower positioning structure;
before or after the mold closing process is carried out, a heating process is carried out, the pipeline is heated independently, and the target temperature of the heating pipeline is higher than the melting points of the upper mold and the lower mold and lower than the melting point of the pipeline, so that after the mold closing process is carried out, the heated pipeline melts the materials of the upper mold and the lower mold around the pipeline, and the upper mold, the lower mold and the pipeline are jointed to obtain a buried pipe structure.
2. The workpiece processing method according to claim 1, wherein the upper positioning structure is an upper positioning groove formed in the upper die, the lower positioning structure is a lower positioning groove formed in the lower die, and the shape surrounded by the upper positioning groove and the lower positioning groove is consistent with the shape of the pipeline;
the step of executing the mold closing process comprises the following steps: and embedding the pipeline between the upper die and the lower die, and positioning and fixing the pipeline by using the upper positioning groove and the lower positioning groove.
3. The method of processing a workpiece according to claim 2, further comprising mechanically fixing the upper die and the lower die while performing the die clamping process; or, after the upper die, the lower die and the pipeline are jointed, the mechanical fixing of the upper die and the lower die is further included.
4. The method of processing a workpiece as set forth in claim 1, wherein the step of performing a heating process before performing a clamping process comprises: and preheating the upper die and the lower die, wherein the preheating temperature is lower than the melting points of the upper die and the lower die.
5. The workpiece processing method of claim 1, wherein after performing the clamping process, the step of performing the heating process comprises:
firstly, independently heating a pipeline to a target temperature;
the line is then maintained at the target temperature and heating is stopped after a period of time has elapsed.
6. The method of claim 5, wherein the step of individually heating the conduits to a target temperature comprises:
heating the pipeline to enable the temperature of the pipeline, the upper die and the lower die to reach a first target temperature, wherein the first target temperature is lower than the melting points of the upper die and the lower die;
the heating rate is then increased to heat the line to the target temperature.
7. A buried pipe structure prepared by the method of workpiece processing according to any one of claims 1 to 6.
8. The buried pipe structure according to claim 7, comprising a base body and a pipeline buried in the base body, wherein the base body comprises the upper die and the lower die, the pipeline is made of stainless steel, and the base body is made of aluminum alloy.
9. A workpiece processing mold is characterized by comprising an upper mold, a lower mold, a positioning device and a heating device, wherein the positioning device comprises an upper positioning structure and a lower positioning structure, the upper positioning structure is arranged on the upper mold, the lower positioning structure is arranged on the lower mold, the shape of the upper positioning structure is consistent with the shape of the upper half part of a pipeline, the shape of the lower positioning structure is consistent with the shape of the lower half part of the pipeline, the pipeline is positioned and fixed between the upper mold and the lower mold through the upper positioning structure and the lower positioning structure, and the heating device is used for heating the pipeline independently, so that after the upper mold, the lower mold and the pipeline are closed, the heated pipeline melts the materials of the upper mold and the lower mold around the pipeline, and the upper mold, the lower mold and the pipeline are jointed; the upper die, the lower die and the pipeline are made of metal materials, the melting point of the upper die and the melting point of the lower die are lower than the melting point of the pipeline, and the target temperature for heating the pipeline is higher than the melting point of the upper die and the melting point of the lower die and lower than the melting point of the pipeline.
10. The mold for processing a workpiece according to claim 9, wherein the upper positioning structure is an upper positioning groove formed in the upper mold, the lower positioning structure is a lower positioning groove formed in the lower mold, and the shape surrounded by the upper positioning groove and the lower positioning groove is identical to the shape of the pipeline.
11. The workpiece-processing die of claim 10, further comprising a fixture for mechanically coupling the upper die and the lower die.
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