CN114346267A - Method and device for processing and shaping crucible pressed compact - Google Patents
Method and device for processing and shaping crucible pressed compact Download PDFInfo
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- CN114346267A CN114346267A CN202011088155.7A CN202011088155A CN114346267A CN 114346267 A CN114346267 A CN 114346267A CN 202011088155 A CN202011088155 A CN 202011088155A CN 114346267 A CN114346267 A CN 114346267A
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Abstract
The invention relates to a method and a device for processing and shaping a crucible green compact, wherein the shaping device comprises: a double turning tool, a tool rest and a vertical lathe chuck; the double turning tools are used for turning the crucible, and the double turning tools are detachably connected with the tool rest; the vertical lathe chuck is used for placing a crucible to be shaped; the double lathe cutters are positioned above the vertical lathe chuck. According to the processing and shaping method and device, through the arrangement and the use of the double turning tools, the tool setting is only needed in the shaping process of the first crucible pressed compact, the tool changing and the tool setting are not needed again in the subsequent processing process, the processing efficiency is improved by at least 20%, the automation level is improved, and the labor cost is reduced.
Description
Technical Field
The invention belongs to the field of powder metallurgy, and particularly relates to a method and a device for processing and shaping a crucible pressed compact.
Background
Tungsten molybdenum is two high temperature resistant metals, tungsten and molybdenum together, and represents one industry, the refractory metal industry. China is a world large tungsten and molybdenum production country, and export accounts for 80% of the world. Tungsten molybdenum and its alloy have high melting point, good heat conduction, good electric conduction, low thermal expansion coefficient, strong high temperature strength, low vapor pressure, wear resistance and chemical corrosion resistance, so that they become indispensable materials in the industries of electronic and power equipment manufacturing, metal material processing, glass manufacturing, high temperature furnace part structure component manufacturing, aerospace, national defense industry and the like. The preparation method of the tungsten molybdenum and the alloy thereof is mainly a powder metallurgy method.
When rare earth metals such as lanthanum, cerium, neodymium, praseodymium and the like are produced by an electrolytic method, a container with high melting point and electrolyte corrosion resistance is needed; when the sapphire crystal is produced by the kyropoulos method, a crucible which can resist 2200 ℃ high temperature without deformation is needed; the crucible which can resist 1800 ℃ high temperature and resist metal solution corrosion is needed when the fluorescent powder is produced. Tungsten or molybdenum has high melting point, high corrosion resistance and high-temperature deformation resistance, so that various crucible-shaped containers prepared by powder metallurgy of tungsten or molybdenum become ideal choices of tungsten or molybdenum. The crucible is produced by a method of pressing, shaping and sintering. Crucibles are typically mass produced, with a batch of tens or even hundreds. The batch production requires as few processes as possible, the degree of automation is as high as possible, and the manual operation is as low as possible.
In the step of blank shaping, only the outer bottom surface and the outer circle of the crucible need to be shaped during shaping, and the inner part of the crucible does not need to be shaped. The existing method is to use a vertical lathe for shaping, and comprises the following steps: and (3) placing the crucible and the crucible mold on a vertical lathe, finding a circle and aligning the center through a dial indicator, and firmly clamping. The second step is that: and (3) installing a bottom surface cutter for leveling the outer bottom surface of the crucible, starting a lathe, rotating the crucible, slightly turning the outer bottom surface of the crucible by using the bottom surface cutter until the outer bottom surface of the crucible is turned to a whole circle, carrying out first tool setting, determining the position (X1, Z1) of a turning tool, calculating the amount of the lower tool, turning to the required size, and finishing turning of the outer bottom surface of the crucible and the outer R corner. The third step: stopping rotating, taking the lower bottom surface cutter, and replacing with an outer circular cutter for turning the outer circle. The fourth step: and opening the main shaft, rotating the crucible, lightly turning the outer circle until the outer circle can be turned, carrying out tool setting, determining the position (X2 and Z2) of the turning tool, calculating the tool setting amount, turning to the required size, and finishing the turning of the outer circle. The fifth step: and stopping the main shaft, taking down the turned crucible, taking out the outer circular cutter, and replacing the bottom cutter for flattening the outer bottom surface of the crucible. And a sixth step: and (4) loading the next crucible, and repeating the steps for turning until all crucibles are turned.
The disadvantages of this prior method are: firstly, the bottom surface cutter 3 and the outer circular cutter 4 are required to be switched in the midway of each crucible cart, the cutters need to be disassembled twice, and the cutters need to be set every time of disassembly, so that not only is the time wasted, the working efficiency is reduced, but also the labor cost is increased; secondly, the sizes of the tool setting at each time cannot be ensured to be the same, the consistency of the sizes of the prepared crucibles is poor, and the phenomenon of size over-tolerance is easy to occur.
Disclosure of Invention
In order to solve the problems, the invention relates to a method and a device for processing and shaping a crucible green compact.
A shaping device for processing a crucible green compact, the shaping device comprising: a double turning tool, a tool rest and a vertical lathe chuck;
the double turning tools are used for turning the crucible, and the double turning tools are detachably connected with the tool rest;
the vertical lathe chuck is used for placing a crucible to be shaped;
the double lathe cutters are positioned above the vertical lathe chuck.
Further, the double turning cutters comprise a bottom surface cutter and an outer circular cutter;
the bottom surface cutter is used for turning the outer bottom surface of the crucible green compact;
the outer circular cutter is used for turning the outer circle of the crucible pressed compact.
Furthermore, an included angle between the bottom surface cutter and the outer circular cutter is 80-88 degrees.
Further, the vertical distance between the knife point of the bottom surface knife and the knife point of the outer circular knife is 40-50 mm.
Furthermore, the material of the tool tips of the bottom surface tool and the outer circular tool can be high-speed steel, hard alloy or diamond.
Further, the tool rest and the double turning tool can be connected through a screw rod.
A method for processing and shaping a crucible green compact comprises the following steps:
preparing a double lathe tool combined by a bottom surface tool and an outer circular tool;
fixing the double turning tools on a tool rest of a vertical lathe, and simultaneously placing a crucible pressed blank to be shaped and a crucible mold on a chuck of the vertical lathe and centering;
rotating the crucible, lightly turning the outer bottom surface of the crucible by the bottom surface cutter, gradually adjusting the contact range of the bottom surface cutter and the outer bottom surface of the crucible until the bottom surface cutter is turned to the periphery of the outer bottom surface of the crucible for a whole circle, carrying out cutter setting, determining the height position Z1 from the bottom surface cutter to the opening part of a crucible green compact and the position X1 from the axis, calculating the cutter setting amount, setting a preset bottom surface program for automatic turning, turning to the required size, completing turning of the outer bottom surface and the outer R corner of the crucible, and completing the turning program setting of the outer bottom surface of the crucible green compact;
and lightly turning the outer circle until the whole circle of the outer circle can be turned, carrying out tool setting for the 2 nd time, determining the position X2 of the outer circle tool from the axis, and calculating the tool setting amount and setting a preset outer circle program for turning for the height position Z2 of the position X2, namely Z1+ the vertical distance between the tool tip of the outer circle tool and the tool tip of the bottom surface tool until the turning of the outer circle is completed and the outer circle turning program setting of the crucible green compact is completed.
Further, in the turning process of the outer bottom surface and the outer circle of the outer crucible, the maximum feed amount of the turning tool is 10 mm/time.
Further, the machining and shaping method further comprises the following steps: and replacing the finished crucible pressed blank, and shaping the next crucible pressed blank with the same specification according to the crucible outer bottom surface turning program and the crucible outer bottom surface turning program of the crucible pressed blank.
According to the processing and shaping method and device, through the arrangement and the use of the double turning tools, tool setting is only needed in the shaping process of the first crucible pressed compact, tool changing and tool setting are not needed in the subsequent processing process, continuous processing can be realized according to the set first-time entering program, the tool changing and tool setting times are greatly reduced in the whole production process, the processing efficiency is improved by at least 20%, the automation level is improved, and the labor cost is reduced; and the size deviation caused by inconsistent tool setting is reduced, the size consistency is improved, and the rejection rate is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic view of a shaping device for processing a crucible green compact according to the present invention;
FIG. 2 shows a schematic view of a double turning tool configuration of a finishing and shaping device according to the present invention;
FIG. 3 shows a flow chart of a method of shaping a crucible compact according to the present invention;
fig. 4 shows a structure of a double lathe tool in embodiment 1 of the present invention;
fig. 5 shows a structure of a double-cutter structure in embodiment 2 of the present invention.
Description of the drawings: 1. the outer bottom surface of the crucible; 2. a tool holder; 3. a bottom surface cutter; 4. an outer circular cutter; 5. the outer circle of the crucible; 6. a crucible mold; 7. vertical lathe chuck.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A shaping device for processing a crucible green compact, as shown in FIG. 1, comprises: a double turning tool, a tool rest 2 and a vertical lathe chuck 7,
the double turning tools are used for turning the crucible, the double turning tools are detachably connected with the tool rest 2, and the double turning tools are located above the chuck 7 of the vertical lathe.
As shown in fig. 2, the double turning tool includes a bottom surface cutter 3 and an outer circular cutter 4. The outer circular cutter 4 is vertical to the vertical lathe chuck 6 and is used for turning the outer circle 5 of the crucible; the included angle between the bottom surface cutter 3 and the outer circular cutter 4 forms an acute angle and is used for turning the outer bottom surface 1 of the crucible.
The bottom surface cutter 3 and the outer circular cutter 4 are fixedly connected, specifically, the top end of the outer circular cutter 4 is welded on the side wall of the bottom surface cutter 3, or the side wall of the outer circular cutter 4 is welded on the top end of the bottom surface cutter 3.
The included angle between the bottom surface cutter 3 and the outer circular cutter 4 is 80-88 degrees. The included angle is set based on the shape of the crucible mold, the included angle between the bottom surface cutter 3 and the outer circular cutter 4 must be smaller than 90 degrees, and if the included angle is 90 degrees, the bottom side of the outer circular cutter 3 may rub against the crucible mold 6 when the bottommost part of the crucible outer circle 5 is turned, which may damage the crucible mold 6 or the outer circular cutter 3. If the angle value is smaller than 80 degrees, a certain vertical distance between the two tool tips is difficult to ensure, and if the angle value is too small, the tool shank of the turning tool is lengthened, which is not favorable for controlling the force of the bottom surface tool or the outer circular tool.
For example, for a common-sized crucible blank, the included angle between the bottom surface blade 3 and the outer circular blade 4 may be 82 °, 84 °, or 86 °.
The vertical distance between the knife point of the bottom knife 3 and the knife point of the outer knife 4 is 40-50 mm. The distance is set to prevent the outer circular cutter 4 from turning to the outer bottom surface 1 of the crucible when the outer R angle is machined by the bottom surface cutter 3, and the distance is related to the dimension of the outer R angle of the crucible, and the distance is larger when the dimension of the outer R angle is larger, but the distance cannot be too large, which may cause the bottom surface cutter 3 to touch the chuck 7 of the vertical lathe when the outer circular cutter 4 turns to the bottommost part of the outer circle 5 of the crucible.
Illustratively, the perpendicular distance between the tip of the bottom surface knife 3 and the tip of the outer circular knife 4 may be 42mm, 45mm, or 48mm, depending on common crucible specifications.
The material of the knife points of the bottom knife 3 and the outer circular knife 4 used in the invention can be high-speed steel, hard alloy, diamond and the like.
Furthermore, the used material is high-speed steel which has the advantages of low price and high cost performance.
The bottom surface cutter 3 and the outer circular cutter 4 are made of stainless steel, and the connection mode between the bottom surface cutter and the outer circular cutter is welding. The knife handle is connected with the knife tip through a screw, a nut and a screw hole.
One side of the tool rest 2, which is far away from the double turning tools, is connected with a travelling device of the vertical lathe, and the travelling device controls the tool rest 2 to move horizontally or vertically at a certain moving speed in the horizontal direction and the vertical direction through the pushing of a motor or an air cylinder.
The tool holder 2 and the double turning tools can be connected through a screw.
Exemplarily, be provided with the recess of two lathe tools of installation on the knife rest 2, the opening of recess is located the downside of knife rest 2, and the top block of two lathe tools is wrapped up by knife rest 2 in the recess, and a plurality of screw holes have been seted up to a side of knife rest 2, and two lathe tool block backs, pass the screw hole with the screw rod, and the screw rod can the two lathe tool sides of butt, screws up the screw rod, realizes the fixed of two lathe tools.
The vertical lathe chuck 7 is used for placing the crucible mold 6, the crucible to be shaped is located on the crucible mold 6, the crucible and the crucible mold 6 are located on the same central shaft, and the crucible mold 6 and the vertical lathe chuck 7 are centered through a dial indicator.
Illustratively, a measuring head of a dial indicator fixed on a lathe body is tightly attached to the excircle of the crucible mold 6, the crucible is rotated, and the position of the crucible is adjusted through the change of a pointer of the dial indicator until the pointer of the dial indicator is basically fixed after the crucible is rotated for one circle, and the crucible is positioned at the center of a chuck 7 of the vertical lathe.
The vertical lathe chuck 7 is provided with a clamping and fixing device for fixing the crucible at the center of the vertical lathe chuck 7.
Wherein, the clamping and fixing device can be flexibly adjusted according to the diameter of the crucible.
Exemplarily, the clamping and fixing device comprises two sliding blocks which are arranged oppositely and can horizontally slide on the vertical lathe chuck 7, after the center of the crucible is aligned with the center of the vertical lathe chuck 7, the two sliding blocks are positioned on two sides of the inner wall of the crucible and are attached to the inner wall of the crucible, and after the two sliding blocks are fixed, the crucible can be fixed at the center of the vertical lathe chuck 7.
The bottom of the vertical lathe chuck 7 is provided with a spindle connected with a rotating motor, and the rotating motor controls the vertical lathe chuck 7 to rotate at a certain speed through the spindle to drive the crucible pressed blank fixed above the chuck to rotate rapidly.
By adopting the processing and shaping device for the crucible pressed compact, the turning process of a plurality of crucibles can be completed without changing the tool through the arrangement of double turning tools, and the production efficiency is improved.
The method for processing and shaping the crucible green compact of the invention comprises the following steps as shown in figure 3:
the first step is as follows: preparing a double turning tool combined by a bottom surface cutter and an outer circular cutter.
The second step is that: fixing the double turning tools on a tool rest of a vertical lathe, and fixing a crucible pressed compact to be shaped on the center of a lathe chuck through a dial indicator;
the third step: and rotating the crucible, lightly turning the outer bottom surface of the crucible by using the bottom surface cutter, adjusting the contact range of the bottom surface cutter and the outer bottom surface of the crucible until the whole periphery of the outer bottom surface of the crucible can be turned, carrying out cutter setting, determining a height position Z1 from the bottom surface cutter to a blank pressing opening part of the crucible and a position X1 away from an axis, wherein the axis is a central axis of the lathe and the blank pressing, X1 is a vertical distance away from the central axis, and calculating the cutter setting amount. Setting according to a preset bottom surface program, automatically turning by a turning tool and a lathe after the program is set, turning to a required size, finishing turning at the outer bottom surface and the outer R corner of the crucible, and finishing the turning program setting of the outer bottom surface of the crucible green compact of the same specification; the preset program is the same as the program for turning the bottom circle of the bottom surface cutter in the prior art, and comprises shaft rotating speed, main shaft forward rotation/reverse rotation, cutter number, feed amount each time, feed path (the feed path determines the feed amount), feed speed, turning times and the like.
The fourth step: and lightly turning the outer circle until the whole circle of the outer circle can be turned, carrying out tool setting for the 2 nd time, determining the position X2 of the outer circle tool from the axis, calculating the tool setting amount for the height position Z2 of the position X2, namely the vertical distance between the Z1+ the outer circle tool and the bottom surface tool, turning according to a preset outer circle program until the turning of the outer circle is completed, and completing the outer circle turning program setting of the crucible green compact with the same specification. The preset excircle program is the same as the program setting for turning the excircle by the excircle cutter in the prior art, and comprises shaft rotating speed, main shaft forward rotation/reverse rotation, cutter number, feed amount each time, feed path, feed speed, turning times and the like.
Wherein, in the turning process of the outer bottom surface and the outer circle of the outer crucible, the maximum feed amount of the turning tool is 10 mm/time.
The fifth step: and disassembling the finished crucible pressed blank, restoring the position of the double turning tools, clamping the next crucible, turning continuously according to the procedures of the outer bottom surface and the outer circle of the outer crucible of the vehicle, completing one procedure, and continuously changing the next crucible for continuous processing.
The processing and shaping device and the processing and shaping method of the crucible green compact are suitable for crucible green compacts with the outer diameter of 100 plus 1000mm (such as crucible green compacts with common specifications of 200mm, 300mm, 400mm, 500mm, 600mm, 700mm, 800mm, 900mm and the like) and crucible green compacts with the height of 100 plus 1300mm (such as crucible green compacts with common specifications of 200mm, 300mm, 400mm, 500mm, 600mm, 700mm, 800mm, 900mm, 1000mm, 1100mm, 1200mm and the like).
According to the processing and shaping method, only the cutter needs to be aligned in the shaping process of the first crucible pressed blank, and the cutter does not need to be adjusted again in the subsequent processing process because the double lathes do not need to be replaced, so that the continuous processing can be carried out according to the set first lathe entering procedure, the times of tool changing and tool adjusting are greatly reduced in the whole production process, the processing efficiency is improved by at least 20%, the automation level is improved, and the labor cost is reduced; and the size deviation caused by inconsistent tool setting is reduced, the size consistency is improved, and the rejection rate is reduced.
To further demonstrate that the method for shaping a crucible green compact according to the present invention can improve the processing efficiency, it is explained by the following examples:
example 1
In this embodiment, a molybdenum crucible with an external form specification of phi 600 x 800mm and an external R angle dimension of 45mm is shaped, a structure diagram of a turning tool is shown in fig. 4, and the specific steps are as follows:
(1) according to the figure 4, the turning tool is prepared, and the tool tip of the turning tool is made of high-speed steel. The included angle between the outer circular cutter and the bottom surface cutter is 82 degrees, the vertical distance between the outer circular cutter and the cutter point of the bottom surface cutter is 48mm, and the length of the bottom surface cutter is 150 mm.
(2) And (3) mounting the turning tool obtained in the step (1) on a tool rest, mounting the crucible green compact to be shaped on a chuck of a vertical lathe, aligning the center, and firmly clamping, wherein the schematic diagram of the crucible after being mounted on the vertical lathe is shown in figure 1.
(3) Shaping the crucible in the step (2), opening a main shaft, rotating the crucible, lightly turning the outer bottom surface of the crucible by a bottom surface cutter, adjusting the contact range of the bottom surface cutter and the outer bottom surface of the crucible until the whole circle of the outer bottom surface of the crucible can be turned, carrying out cutter setting, determining the height position Z1 from the bottom surface cutter to the opening part of a crucible green compact and the position X1 away from the axis, calculating the cutter setting amount, setting a program for automatic turning, turning to the required size, completing turning of the outer bottom surface and the outer R corner of the crucible, and completing turning program setting of the outer bottom surface of the crucible green compact;
and lightly turning the outer circle until the whole circle of the outer circle can be turned, carrying out tool setting for the 2 nd time, determining the position X2 of the outer circle tool from the axis, calculating the tool setting amount for the height position Z2 of Z1+48, turning until the turning of the outer circle is finished, and finishing the program setting of the outer circle turning of the crucible green compact. The crucible is unloaded and the next crucible is loaded after the vehicle is turned to the desired size phi 600 x 800 mm.
(4) Shaping the next crucible: and (4) clamping the next crucible, programming procedures for turning the outer bottom surface and the outer circle of the crucible, turning, finishing one procedure, and continuously changing the next crucible for continuous processing.
The 10 pieces of molybdenum crucibles with the diameter of 600 x 800mm prepared by the method of the embodiment have the same size, the average processing time is 8h per piece, and the processing time is shortened by 2h on average compared with the processing time of the original processing method.
Example 2
In this embodiment, a tungsten crucible with an external form specification of 200 x 200mm and an external R angle of 40mm is shaped, and a structure diagram of a turning tool used is shown in fig. 5, and the specific steps are as follows:
(1) according to the figure 2, the turning tool is prepared, and the tool tip of the turning tool is made of high-speed steel. The included angle between the outer circular cutter and the bottom surface cutter is 83 degrees, the vertical distance between the outer circular cutter and the cutter point of the bottom surface cutter is 45mm, and the length of the bottom surface cutter is 90 mm.
(2) And (3) mounting the turning tool obtained in the step (1) on a tool rest, mounting the crucible pressed blank to be shaped on a chuck of a vertical lathe, aligning the center and firmly clamping.
(3) Shaping the crucible in the step (2), opening a main shaft, rotating the crucible, slightly turning the outer bottom surface of the crucible by a bottom surface cutter to adjust the contact range of the bottom surface cutter and the outer bottom surface of the crucible until the outer bottom surface of the crucible can be turned completely, carrying out cutter setting, determining the height position Z1 from the bottom surface cutter to the opening part of a crucible green compact and the position X1 from the axis, calculating the cutter setting amount, setting a program to carry out automatic turning, turning to a required size, finishing turning at the outer bottom surface and the outer R corner of the crucible, and finishing the turning program setting of the outer bottom surface of the crucible green compact; and lightly turning the outer circle until the whole circle of the outer circle can be turned, carrying out tool setting for the 2 nd time, determining the position X2 of the outer circle tool from the axis, calculating the tool setting amount for the height position Z2 of the position Z1+45, turning until the turning of the outer circle is finished, and finishing the program setting of the outer circle turning of the crucible green compact. The crucible is unloaded and the next crucible is loaded after turning to the desired dimension phi 200 x 200 mm.
(4) Shaping the next crucible: and (4) clamping the next crucible, knitting the procedures of turning the outer bottom surface and the outer circle of the crucible according to the step (3), turning, finishing one procedure, and continuously changing the next crucible for continuous processing.
The 20 tungsten crucibles with 200mm phi and 200mm prepared by the method of the embodiment have the same size, the average processing time is 3h per crucible, and the processing time is shortened by 1h on average compared with the processing time of the original processing method.
According to the processing and shaping method and device, through the arrangement and the use of the double turning tools, only the tool setting is needed in the shaping process of the first crucible pressed compact, and the tool changing and setting are not needed again in the subsequent processing process, so that the tool changing and setting times are greatly reduced, and the automation level is greatly improved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A shaping device for processing a crucible green compact, comprising: a double turning tool, a tool rest and a vertical lathe chuck;
the double turning tools are used for turning the crucible, and the double turning tools are detachably connected with the tool rest;
the vertical lathe chuck is used for placing a crucible to be shaped;
the double lathe cutters are positioned above the vertical lathe chuck.
2. The apparatus for shaping a crucible compact according to claim 1, wherein the double turning tool comprises a bottom surface cutter and an outer circular cutter;
the bottom surface cutter is used for turning the outer bottom surface of the crucible green compact;
the outer circular cutter is used for turning the outer circle of the crucible pressed compact.
3. The apparatus for shaping a crucible green compact according to claim 2, wherein the bottom surface cutter and the outer cutter are arranged at an angle of 80 to 88 °.
4. The apparatus for shaping a crucible green compact according to claim 2, wherein the vertical distance between the tip of the bottom surface cutter and the tip of the outer circular cutter is 40 to 50 mm.
5. The apparatus for shaping a crucible green compact according to claim 2, wherein the bottom surface cutter and the outer circular cutter are made of high speed steel, cemented carbide or diamond.
6. A device for shaping a crucible green compact according to claim 1, wherein the tool holder and the double turning tool are connected by a screw.
7. A method for processing and shaping a crucible green compact is characterized by comprising the following steps:
preparing a double lathe tool combined by a bottom surface tool and an outer circular tool;
fixing the double turning tools on a tool rest of a vertical lathe, and simultaneously placing a crucible pressed blank to be shaped and a crucible mold on a chuck of the vertical lathe and centering;
rotating the crucible, lightly turning the outer bottom surface of the crucible by the bottom surface cutter, gradually adjusting the contact range of the bottom surface cutter and the outer bottom surface of the crucible until the bottom surface cutter is turned to the periphery of the outer bottom surface of the crucible for a whole circle, carrying out cutter setting, determining the height position Z1 from the bottom surface cutter to the opening part of a crucible green compact and the position X1 from the axis, calculating the cutter setting amount, setting a preset bottom surface program for automatic turning, turning to the required size, completing turning of the outer bottom surface and the outer R corner of the crucible, and completing the turning program setting of the outer bottom surface of the crucible green compact;
and lightly turning the outer circle until the whole circle of the outer circle can be turned, carrying out tool setting for the 2 nd time, determining the position X2 of the outer circle tool from the axis, and calculating the tool setting amount and setting a preset outer circle program for turning for the height position Z2 of the position X2, namely Z1+ the vertical distance between the tool tip of the outer circle tool and the tool tip of the bottom surface tool until the turning of the outer circle is completed and the outer circle turning program setting of the crucible green compact is completed.
8. The method of shaping a crucible compact according to claim 7, wherein:
in the turning process of the outer bottom surface and the outer circle of the outer crucible, the maximum feed amount of the turning tool is 10 mm/time.
9. The method of shaping a crucible compact according to claim 7, further comprising: and replacing the finished crucible pressed blank, and shaping the next crucible pressed blank with the same specification according to the crucible outer bottom surface turning program and the crucible outer bottom surface turning program of the crucible pressed blank.
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