A method of machining a tungsten alloy annular wafer

Abstract

The present application relates to a kind of processing method of tungsten alloy annular sheet, belong to annular sheet processing technical field.The present application includes the following steps: S1, tungsten alloy powder is pressed into multiple annular sheet blanks and the sintering treatment of multiple annular sheet blanks prepared is carried out;S2, multiple annular sheet blanks are shaped, and the inner hole consistency of multiple annular sheet blanks is guaranteed;S3, each annular sheet blank is respectively processed by two end face grinding;S4, multiple annular sheet blanks after two end face grinding processing are simultaneously processed by outer lateral wall cutting;S5, multiple annular sheet blanks after outer circle cutting processing are simultaneously processed by boring processing.The processing method of tungsten alloy annular sheet provided by the present application is more efficient, and material cost is lower, solves the technical problem that the processing method of annular sheet in prior art by powder metallurgy process is difficult to produce higher income due to long production cycle and high production cost.

Description

Technical Field

[0001] This invention relates to the field of annular sheet processing technology, and more particularly to a method for processing tungsten alloy annular sheets. Background Technology

[0002] In the powder metallurgy industry, the production of annular sheets typically involves first creating a cylindrical solid bar blank of a certain height through pressing, sintering, and post-sintering processing. This blank is then sequentially subjected to internal boring, external turning, cutting, and end-face grinding to obtain the finished annular sheet. This processing method, requiring the cutting of the cylindrical bar into multiple annular sheets, results in numerous processing steps, a long production cycle, and low production efficiency. Furthermore, the existing process requires internal boring of the solid cylindrical bar, leading to significant cutting volume, low material utilization, and high production costs. All these issues contribute to the difficulty in generating high profits from the production of annular sheets. Summary of the Invention

[0003] This invention provides a method for processing tungsten alloy annular sheets, which solves the technical problem that the existing processing method of annular sheets by powder metallurgy is difficult to generate high profits due to long production cycle and high production cost.

[0004] To solve the above problems, the present invention provides a processing method for tungsten alloy annular thin sheets, which adopts the following technical solution:

[0005] A method for processing a tungsten alloy annular thin sheet includes the following steps:

[0006] S1. Press tungsten alloy powder into multiple annular thin sheet blanks and sinter the resulting multiple annular thin sheet blanks.

[0007] S2. Shape the multiple annular thin sheet blanks to ensure the consistency of the inner holes of the multiple annular thin sheet blanks;

[0008] S3. Grind both ends of each annular thin sheet blank.

[0009] S4. Simultaneously perform outer wall cutting on multiple annular thin sheet blanks that have undergone two-end face grinding.

[0010] S5. The multiple annular thin sheet blanks that have undergone outer diameter cutting are simultaneously subjected to boring.

[0011] The beneficial effects of the above technical solution are as follows: Tungsten alloy powder is directly pressed into annular thin sheet blanks, and then the annular thin sheet blanks are successively shaped, the end faces are ground, the outer side walls are turned, and the inner holes are bored to produce annular thin sheet finished products. Compared with the traditional method of first making a cylindrical solid bar, then boring the inner hole of the cylindrical solid bar and cutting it into annular thin sheets, less tungsten alloy powder is consumed, fewer processing steps are required, the production cycle is shorter, and the material cost is lower. It can effectively improve production efficiency and conforms to the principles of lean production.

[0012] Furthermore, step S1 involves using an annular sheet forming fixture to process the annular sheet blank. The annular sheet forming fixture includes a female mold and a mandrel. The female mold has a forming hole that extends through it along its axial direction. The mandrel is coaxially disposed within the forming hole with the female mold. A forming channel with an annular cross-section is formed between the outer wall of the mandrel and the wall of the forming hole.

[0013] The bottom of the forming channel is provided with a pressing block whose cross-section is adapted to the cross-sectional shape of the forming channel. The pressing block is sleeved on the mandrel. The inner diameter of the pressing block is adapted to the outer diameter of the mandrel, and the outer diameter of the pressing block is adapted to the diameter of the forming hole.

[0014] The top of the forming channel is provided with an upper pressure block whose cross-section is adapted to the cross-sectional shape of the forming channel. The upper pressure block is sleeved on the mandrel. The inner diameter of the bottom of the upper pressure block is adapted to the outer diameter of the mandrel, and the outer diameter of the bottom of the upper pressure block is adapted to the diameter of the forming hole, so that the upper pressure block can slide up and down in the forming channel.

[0015] A gap is provided between the bottom surface of the upper pressure block and the top surface of the lower pressure block, and this gap forms the forming cavity for placing tungsten alloy powder;

[0016] A limiting block is provided above the female mold. When the upper pressing block is pressed into the molding cavity filled with tungsten alloy powder under its own weight, the top surface of the upper pressing block is higher than the top surface of the limiting block.

[0017] Furthermore, in step S1, the upper pressure block is first removed from the forming channel and tungsten alloy powder is placed into the forming cavity. Then, the upper pressure block is placed into the forming channel, and the entire annular sheet forming fixture is placed on the press. The press acts on the top surface of the upper pressure block, causing the upper pressure block to move down and press the tungsten alloy powder in the forming cavity. The press presses the upper pressure block down until its top surface is flush with the top surface of the limiting block, so that the tungsten alloy powder in the forming cavity is pressed into an annular sheet blank. Then, the limiting block is removed, and the entire annular sheet forming fixture is rearranged and placed back on the press. The press acts on the female mold, and the female mold and the upper pressure block slide relative to each other. The upper pressure block pushes the annular sheet blank out of the forming cavity. The above steps are repeated to produce multiple annular sheet blanks in sequence.

[0018] Furthermore, step S2 involves shaping the annular sheet blank using a shaping fixture. The shaping fixture includes a shaping sleeve and a shaping block. One end of the shaping sleeve has a shaping groove for placing the annular sheet blank. The inner diameter of the shaping groove is adapted to the outer diameter of the annular sheet blank. The bottom of the shaping groove has a shaping through hole that is coaxial with the shaping groove and penetrates the shaping sleeve. The outer diameter of the shaping block is larger than the inner diameter of the annular sheet blank and smaller than the diameter of the shaping through hole. The shaping block is used to press the end of the inner hole of the annular sheet blank in the shaping groove.

[0019] In step S2, multiple sintered annular sheet blanks are placed sequentially in the shaping groove, and the shaping block is placed at the end of the inner hole of the annular sheet blank located in the shaping groove. A press is used to act on the shaping block, and the shaping block passes through the inner hole of the annular sheet blank and falls into the shaping through hole to complete the shaping.

[0020] The beneficial effects of the above technical solution are as follows: the sintered annular sheet blank will deform, and a protrusion deformation may occur on its inner hole. By placing the annular sheet blank in the shaping groove and letting the shaping block pass through the inner hole of the annular sheet blank, the shaping block will squeeze the inner hole of the annular sheet blank when it passes through, so that the annular sheet blank completes the hole expansion and shaping, so that the annular sheet blank can be smoothly fitted onto the tooling in the subsequent processing, which is convenient for processing.

[0021] Furthermore, step S4 involves machining the outer wall of the annular sheet blank using an outer wall grinding fixture. This fixture includes a central shaft, a stop washer, and a locking nut. The central shaft comprises a limiting shaft section, a mounting shaft section, and a locking shaft section connected coaxially in sequence. The outer diameter of the limiting shaft section is larger than that of the mounting shaft section. The outer diameter of the mounting shaft section is adapted to the inner diameter of the shaped annular sheet blank. The mounting shaft section is used to accommodate multiple annular sheet blanks. The stop washer is fitted onto the locking shaft section, and a locking nut is threaded onto the locking shaft section. The locking nut is used to press against the stop washer, causing the stop washer to press against the multiple annular sheet blanks on the mounting shaft section.

[0022] Furthermore, in step S4, multiple annular thin sheet blanks with ground end faces are sequentially fitted onto the mounting shaft section, the stop washer is fitted onto the locking shaft section, and the locking nut is threaded onto the locking shaft section. The locking nut is then tightened to press the stop washer and the multiple annular thin sheet blanks together, thus fixing the multiple annular thin sheet blanks. The outer wall grinding fixture with the multiple annular thin sheet blanks is fixed on a lathe, and the fixture on the lathe is clamped at both ends of the central shaft. The cutting tool on the lathe cuts the outer wall of the multiple annular thin sheet blanks to process the outer diameter of the multiple annular thin sheet blanks to the range of the outer diameter of the finished annular thin sheet.

[0023] The beneficial effects of the above technical solution are: multiple annular thin sheet blanks are all sleeved on the same shaft, and the multiple annular thin sheets are stacked on the shaft to form a cylindrical sleeve structure. The outer surfaces of the multiple annular thin sheets forming the cylindrical sleeve structure are processed simultaneously, which makes cutting more convenient and the processing efficiency higher.

[0024] Furthermore, step S5 involves boring the inner hole of the annular sheet blank using an internal boring tool. The tool includes an internal boring sleeve and a stop nut. The internal boring sleeve has a mounting through hole extending along its axis and penetrating the sleeve. The mounting through hole includes a limiting hole section, a mounting hole section, and a locking hole section connected in sequence. The diameter of the limiting hole section is smaller than the diameter of the mounting hole section, forming a limiting step at the connection point between the limiting hole section and the mounting hole section. The diameter of the mounting hole section is adapted to the outer diameter of the machined annular sheet blank. The mounting hole section is used to accommodate multiple coaxially stacked sheets. An annular sheet blank has a locking hole section with a larger diameter than the mounting hole section. The locking hole section has an internal thread. The stop nut has a through hole extending through it along its axis. The stop nut includes a clamping section and a connecting section connected sequentially along its axis. The outer diameter of the connecting section matches the inner diameter of the locking hole section. The connecting section has an external thread. The outer diameter of the clamping section is smaller than the outer diameter of the connecting section but larger than the inner diameter of the annular sheet blank. The connecting section is threadedly connected to the locking hole section. The clamping section is used to press multiple annular sheet blanks within the mounting hole section.

[0025] Furthermore, in step S5, multiple machined annular sheet blanks are placed in the mounting holes, and the connecting section of the stop nut is threaded into the locking hole section, with the clamping section of the stop nut facing the annular sheet blank in the mounting hole section. The stop nut is screwed on so that the clamping section presses against the multiple annular sheet blanks in the mounting hole section, thus fixing the multiple annular sheet blanks. The boring fixture with multiple annular sheet blanks is installed on a boring machine, and the two ends of the boring sleeve are clamped using the fixture on the boring machine. The boring tool on the boring machine is used to bore the inner hole of the annular sheet blank, so that the hole diameter of the annular sheet blank is machined to the range of the inner hole diameter of the finished annular sheet, thus obtaining the finished annular sheet.

[0026] The beneficial effects of the above technical solution are: fixing multiple annular thin sheet blanks in the boring inner hole sleeve, and boring multiple annular thin sheet blanks at the same time, resulting in higher processing efficiency.

[0027] Furthermore, in step S5, after boring the inner hole of the annular sheet blank, the stop nut is removed from the boring inner hole sleeve, and a push rod is inserted along one end of the limiting hole section on the boring inner hole sleeve. The push rod pushes against the annular sheet finished product on the mounting hole section to push out multiple annular sheet finished products in the mounting hole section. Attached Figure Description

[0028] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0029] Figure 1 A schematic diagram of the annular sheet forming fixture used in the processing method of a tungsten alloy annular sheet provided by the present invention;

[0030] Figure 2 A schematic diagram of the shaping fixture used in the processing method of a tungsten alloy annular sheet provided by the present invention;

[0031] Figure 3 A schematic diagram of the grinding outer wall tooling used in the processing method of a tungsten alloy annular thin sheet provided by the present invention;

[0032] Figure 4 A schematic diagram of the boring tool used in the processing method of a tungsten alloy annular sheet provided by the present invention;

[0033] Figure 5 This is a schematic diagram of the boring sleeve in the boring tooling used in the processing method of a tungsten alloy annular sheet provided by the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Mandrel; 2. Female mold; 3. Lower pressure block; 4. Upper pressure block; 5. Limiting block; 6. Annular thin sheet blank; 7. Shaping sleeve; 701. Shaping through hole; 8. Shaping block; 9. Central shaft; 901. Limiting shaft section; 902. Mounting shaft section; 903. Locking shaft section; 10. Stop washer; 11. Locking nut; 12. Boring inner hole sleeve; 1201. Limiting hole section; 1202. Mounting hole section; 1203. Locking hole section; 13. Stop nut; 1301. Pressing section; 1302. Connecting section. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] The following is one embodiment of a processing method for a tungsten alloy annular sheet provided by the present invention:

[0038] A method for processing tungsten alloy annular sheets is disclosed, which is used to process tungsten alloy annular sheets in the form of a ring. The processing method is achieved by using annular sheet forming fixture, shaping fixture, outer wall grinding fixture and inner hole boring fixture.

[0039] like Figure 1 As shown, the above-mentioned annular sheet forming fixture includes a female mold 2, a mandrel 1, an upper pressure block 4, a lower pressure block 3, and a limiting block 5. The female mold 2 has a forming hole that runs vertically through the top and bottom and has a circular cross-section. The mandrel 1 is cylindrical and is coaxially arranged in the forming hole. The outer diameter of the mandrel 1 is smaller than the diameter of the forming hole. A forming channel with a circular cross-section is formed between the outer wall of the mandrel 1 and the wall of the forming hole.

[0040] The bottom of the forming channel is provided with a lower pressure block 3 with a circular cross-section. The lower pressure block 3 is sleeved on the mandrel 1. The inner diameter of the lower pressure block 3 is adapted to the outer diameter of the mandrel 1. Here, the adaptation means that there is a clearance fit between the lower pressure block 3 and the mandrel 1. The outer diameter of the lower pressure block 3 is adapted to the diameter of the forming hole. Here, the adaptation means that there is a clearance fit between the lower pressure block 3 and the female mold 2, so that the lower pressure block 3 can be removed from the forming channel.

[0041] The top of the forming channel is provided with an upper pressure block 4, which includes a bearing section and a sliding section arranged coaxially from top to bottom. Both the bearing section and the sliding section have annular cross-sections. The sliding section is fitted onto the mandrel 1. The inner diameter of the sliding section matches the outer diameter of the mandrel 1 (a clearance fit). The outer diameter of the sliding section matches the diameter of the forming hole (a clearance fit between the sliding section and the forming hole of the female mold 2), allowing the sliding section to slide up and down within the forming channel. The inner diameter of the bearing section is larger than that of the sliding section, and the outer diameter of the bearing section is smaller than that of the sliding section. This creates a gap between the inner hole of the bearing section and the mandrel 1, and a gap between the outer wall of the bearing section and the wall of the forming hole. This reduces the contact area between the upper pressure block 4 and the mandrel 1 and the wall of the forming hole, reducing friction and facilitating downward pressure on the upper pressure block 4.

[0042] A gap is provided between the bottom surface of the upper pressure block 4 and the top surface of the lower pressure block 3, forming a molding cavity for placing tungsten alloy powder. A limiting block 5 is provided above the female mold 2. When the upper pressure block 4 is pressed into the molding cavity filled with tungsten alloy powder under its own weight, the top surface of the upper pressure block 4 is higher than the top surface of the limiting block 5. When the upper pressure block 4 moves under pressure until its top surface is flush with the top surface of the limiting block 5, the height dimension of the molding cavity is equal to the thickness dimension of the annular sheet blank 6 to be made.

[0043] like Figure 2 As shown, the forming fixture includes a forming sleeve 7 and a forming block 8. The forming sleeve 7 is cylindrical, and one end of the forming sleeve 7 has a forming groove for placing the annular sheet blank 6. The inner diameter of the forming groove is adapted to the outer diameter of the annular sheet blank 6. This adaptation means that there is a clearance fit between the forming groove and the annular sheet blank 6, so that the annular sheet blank 6 can be placed into the forming groove. The forming block 8 is a sphere made of tungsten alloy. The forming block 8 is used to press the end of the inner hole of the annular sheet blank 6 in the forming groove. The bottom of the forming groove has a forming through hole 701 that is coaxial with the forming groove and penetrates the forming sleeve 7. The outer diameter of the forming block 8 is larger than the inner diameter of the annular sheet blank 6 and smaller than the diameter of the forming through hole 701, so that the forming block 8 can pass through the inner hole of the annular sheet blank 6 and fall into the forming through hole 701 under the action of external force.

[0044] like Figure 3As shown, the aforementioned grinding outer wall fixture includes a central shaft 9, a stop washer 10, and a locking nut 11. The central shaft 9 includes a limiting shaft section 901, a mounting shaft section 902, and a locking shaft section 903, which are connected sequentially and coaxially. The outer diameter of the limiting shaft section 901 is larger than that of the mounting shaft section 902. The outer diameter of the mounting shaft section 902 is adapted to the inner diameter of the shaped annular sheet blank 6. Here, "adapted" means that the inner diameter of the shaped annular sheet blank 6 is slightly larger than the outer diameter of the mounting shaft section 902, so that the annular sheet blank 6 can be fitted onto the mounting shaft section 902. The stop washer 10 is fitted onto the locking shaft section 903, and the locking shaft section 903 is threaded with the locking nut 11. The locking nut 11 is used to press against the stop washer 10 so that the stop washer 10 presses against the multiple annular sheet blanks 6 on the mounting shaft section 902.

[0045] like Figure 4 As shown, the aforementioned boring tool includes an inner hole sleeve 12 and a stop nut 13, as follows: Figure 5 As shown, the boring inner sleeve 12 has a mounting through hole extending along its axis and penetrating the inner sleeve 12. The mounting through hole includes a limiting hole section 1201, a mounting hole section 1202, and a locking hole section 1203 connected in sequence. The diameter of the limiting hole section 1201 is smaller than that of the mounting hole section 1202, so as to form a limiting step at the connection position of the limiting hole section 1201 and the mounting hole section 1202. The diameter of the mounting hole section 1202 is adapted to the outer diameter of the machined annular sheet blank 6. Here, the adaptation means that there is a clearance fit between the mounting hole section 1202 and the annular sheet blank 6, so that multiple coaxially stacked annular sheet blanks 6 can be placed in the mounting hole section 1202.

[0046] The diameter of the locking hole section 1203 is larger than that of the mounting hole section 1202, and the locking hole section 1203 has internal threads. The aforementioned stop nut 13 has a through hole extending along its axis, the size of which is larger than the diameter of the annular sheet blank 6. The locking nut 11 includes a pressing section 1301 and a connecting section 1302 connected sequentially along its axis. The outer diameter of the connecting section 1302 matches the inner diameter of the locking hole section 1203, and the connecting section 1302 has external threads. The outer diameter of the pressing section 1301 is smaller than that of the connecting section 1302 but larger than the inner diameter of the annular sheet blank 6. The connecting section 1302 is threadedly connected to the locking hole section 1203, and the pressing section 1301 is used to press against multiple annular sheet blanks 6 within the mounting hole section 1202.

[0047] A method for processing a tungsten alloy annular thin sheet includes the following steps:

[0048] S1. Remove the upper pressure block 4 from the annular sheet forming fixture. Place tungsten alloy powder into the forming cavity, then insert the upper pressure block 4 into the forming channel. Place the entire annular sheet forming fixture on a press, so that the press acts on the top surface of the upper pressure block 4, pressing the upper pressure block 4 downward to compress the tungsten alloy powder in the forming cavity. The press presses the upper pressure block 4 down until its top surface is flush with the top surface of the limiting block 5, so that the tungsten alloy powder in the forming cavity is pressed into annular sheet blank 6. Then remove the limiting block 5, change the upper and lower positions of the entire annular sheet forming fixture, and place it on the press again. The press acts on the female mold 2, and the female mold 2 slides relative to the upper pressure block 4. The upper pressure block 4 pushes the annular sheet blank 6 out of the forming cavity. Repeat the above steps to produce multiple annular sheet blanks, and sinter the resulting multiple annular sheet blanks 6.

[0049] S2. The sintered annular sheet blanks 6 are placed sequentially in the shaping groove of the shaping sleeve 7. The shaping block 8 is placed at the end of the inner hole of the annular sheet blank 6 located in the shaping groove. The shaping block 8 is pressed by a press to make the shaping block 8 pass through the inner hole of the annular sheet blank 6 and fall into the shaping through hole 701. The shaping block 8 squeezes the inner hole of the annular sheet blank 6 to complete the shaping of the annular sheet blank 6.

[0050] S3. Use a grinding machine to grind the two end faces of the multiple annular sheet blanks 6 after shaping, so that the thickness of the annular sheet blanks 6 is processed to the thickness range of the finished annular sheet.

[0051] S4. Multiple annular thin sheet blanks 6 with ground end faces are fitted onto the mounting shaft section 902. The total thickness of the multiple annular thin sheet blanks 6 on the mounting shaft section 902 is greater than the length of the mounting shaft section 902, and the difference in size is less than the thickness of a single annular thin sheet blank 6. The stop washer 10 is fitted onto the locking shaft section 903, and the locking nut 11 is threaded onto the locking shaft section 903. The locking nut 11 is tightened to press the stop washer 10 and the multiple annular thin sheet blanks 6, thus fixing the multiple annular thin sheet blanks 6. The outer wall grinding fixture with multiple annular thin sheet blanks 6 is fixed on a lathe, and the fixture on the lathe is clamped at both ends of the central shaft 9. The cutting tool on the lathe cuts the outer wall of the multiple annular thin sheet blanks 6 to process the outer diameter of the multiple annular thin sheet blanks 6 to the range of the outer diameter of the finished annular thin sheet.

[0052] S5. Place multiple machined annular sheet blanks 6 into the mounting holes. Thread the connecting section 1302 of the stop nut 13 into the locking hole section 1203, with the clamping section 1301 of the stop nut 13 facing the annular sheet blanks 6 in the mounting hole section 1202. Tighten the stop nut 13 to press the clamping section 1301 against the multiple annular sheet blanks 6 in the mounting hole section 1202, thus fixing the multiple annular sheet blanks 6. Install the boring fixture with the multiple annular sheet blanks 6 on a boring machine and use the boring tool... The fixture on the machine tool clamps the two ends of the boring inner sleeve 12. The boring tool on the boring machine is used to bore the inner hole of the annular sheet blank 6, so that the hole diameter of the annular sheet blank 6 is processed to the range of the inner hole size of the finished annular sheet, thus producing the finished annular sheet. Then, the stop nut 13 is removed from the boring inner sleeve 12, and a push rod is inserted along one end of the limiting hole section 1201 on the boring inner sleeve 12. The push rod pushes against the finished annular sheet on the mounting hole section 1202 to push out multiple finished annular sheets in the mounting hole section 1202.

[0053] This invention directly processes annular sheet blanks using annular sheet forming fixtures, and then sequentially processes the annular sheet blanks through sintering, shaping, end face grinding, outer circle grinding, and inner hole boring to obtain the finished annular sheet. Compared with the traditional method of first making a cylindrical solid bar and then processing the cylindrical solid bar to cut it into multiple annular sheets, this method consumes less raw materials, has fewer processing steps, shortens the product processing cycle, and can effectively reduce product production costs and improve product production efficiency.

[0054] In this embodiment, the mandrel in the annular sheet forming fixture is cylindrical, and the cross-sections of the upper pressure block, lower pressure block, and forming channel are all annular. It can be used to process annular sheet products. In other embodiments, the mandrel is cuboid, and the cross-sections of the upper pressure block, lower pressure block, and forming channel are all square annular. In this case, the annular sheet forming fixture is used to process square annular sheet products.

Claims

1. A method for processing a tungsten alloy annular thin sheet, characterized in that, Includes the following steps: S1. Press tungsten alloy powder into multiple annular thin sheet blanks and sinter the resulting multiple annular thin sheet blanks. S2. Shape the multiple annular thin sheet blanks to ensure the consistency of the inner holes of the multiple annular thin sheet blanks; S3. Grind both ends of each annular thin sheet blank. S4. Simultaneously perform outer wall cutting on multiple annular thin sheet blanks that have undergone two-end face grinding. S5. The multiple annular thin sheet blanks that have undergone outer diameter cutting are simultaneously subjected to boring. Step S2 involves shaping the annular sheet blank using a shaping fixture. The fixture includes a shaping sleeve and a shaping block. One end of the shaping sleeve has a shaping groove for placing the annular sheet blank. The inner diameter of the shaping groove is adapted to the outer diameter of the annular sheet blank. The bottom of the shaping groove has a shaping through hole that is coaxial with the shaping groove and penetrates the shaping sleeve. The shaping block is a sphere made of tungsten alloy. The outer diameter of the shaping block is larger than the inner diameter of the annular sheet blank and smaller than the diameter of the shaping through hole. The shaping block is used to press the end of the inner hole of the annular sheet blank in the shaping groove. In step S2, multiple sintered annular sheet blanks are placed sequentially in the shaping groove, and the shaping block is placed at the end of the inner hole of the annular sheet blank located in the shaping groove. A press is used to act on the shaping block, and the shaping block passes through the inner hole of the annular sheet blank and falls into the shaping through hole to complete the shaping.

2. The method for processing a tungsten alloy annular thin sheet according to claim 1, characterized in that, Step S1 involves using an annular sheet forming fixture to process an annular sheet blank. The annular sheet forming fixture includes a female mold and a mandrel. The female mold has a forming hole that extends through it along its axial direction. The mandrel is coaxially disposed in the forming hole with the female mold. A forming channel with an annular cross-section is formed between the outer wall of the mandrel and the wall of the forming hole. The bottom of the forming channel is provided with a pressing block whose cross-section is adapted to the cross-sectional shape of the forming channel. The pressing block is sleeved on the mandrel. The inner diameter of the pressing block is adapted to the outer diameter of the mandrel, and the outer diameter of the pressing block is adapted to the diameter of the forming hole. The top of the forming channel is provided with an upper pressure block whose cross-section is adapted to the cross-sectional shape of the forming channel. The upper pressure block is sleeved on the mandrel. The inner diameter of the bottom of the upper pressure block is adapted to the outer diameter of the mandrel, and the outer diameter of the bottom of the upper pressure block is adapted to the diameter of the forming hole, so that the upper pressure block can slide up and down in the forming channel. A gap is provided between the bottom surface of the upper pressure block and the top surface of the lower pressure block, and this gap forms a molding cavity for placing tungsten alloy powder; A limiting block is provided above the female mold. When the upper pressing block is pressed into the molding cavity filled with tungsten alloy powder under its own weight, the top surface of the upper pressing block is higher than the top surface of the limiting block.

3. The processing method of a tungsten alloy annular thin sheet according to claim 2, characterized in that, In step S1, the upper pressure block is first removed from the forming channel and tungsten alloy powder is placed into the forming cavity. Then, the upper pressure block is placed back into the forming channel, and the entire annular sheet forming fixture is placed on the press. The press acts on the top surface of the upper pressure block, causing it to move down and press the tungsten alloy powder in the forming cavity. The press presses the upper pressure block down until its top surface is flush with the top surface of the limiting block, thus pressing the tungsten alloy powder in the forming cavity into annular sheet blanks. The limiting block is then removed, and the entire annular sheet forming fixture is rearranged and placed back on the press. The press acts on the female mold, and the female mold and the upper pressure block slide relative to each other. The upper pressure block pushes the annular sheet blank out of the forming cavity. The above steps are repeated to produce multiple annular sheet blanks in sequence.

4. A method for processing a tungsten alloy annular sheet according to any one of claims 1-3, characterized in that, Step S4 involves machining the outer wall of the annular sheet blank using an outer wall grinding fixture. This fixture includes a central shaft, a stop washer, and a locking nut. The central shaft comprises a limiting shaft section, a mounting shaft section, and a locking shaft section connected coaxially in sequence. The outer diameter of the limiting shaft section is larger than that of the mounting shaft section. The outer diameter of the mounting shaft section matches the inner diameter of the shaped annular sheet blank. The mounting shaft section accommodates multiple annular sheet blanks. The stop washer is fitted onto the locking shaft section, which is threaded with a locking nut. The locking nut presses against the stop washer, causing the stop washer to press against the multiple annular sheet blanks on the mounting shaft section.

5. The method for processing a tungsten alloy annular sheet according to claim 4, characterized in that, In step S4, multiple annular thin sheet blanks with ground end faces are sequentially fitted onto the mounting shaft section. The stop washer is fitted onto the locking shaft section. The locking nut is threaded onto the locking shaft section. The locking nut is tightened to press the stop washer and the multiple annular thin sheet blanks together, thus fixing the multiple annular thin sheet blanks. The outer wall grinding fixture with multiple annular thin sheet blanks is fixed on a lathe. The fixture on the lathe is clamped at both ends of the central shaft. The cutting tool on the lathe cuts the outer wall of the multiple annular thin sheet blanks to process the outer diameter of the multiple annular thin sheet blanks to the range of the outer diameter of the finished annular thin sheet.

6. A method for processing a tungsten alloy annular sheet according to any one of claims 1-3, characterized in that, Step S5 involves boring the inner hole of the annular sheet blank using an internal boring tool. The tool includes an internal boring sleeve and a stop nut. The internal boring sleeve has a mounting through hole extending along its axis and penetrating the sleeve. The mounting through hole includes a limiting hole section, a mounting hole section, and a locking hole section connected in sequence. The diameter of the limiting hole section is smaller than the diameter of the mounting hole section, forming a limiting step at the connection point between the limiting hole section and the mounting hole section. The diameter of the mounting hole section is adapted to the outer diameter of the machined annular sheet blank. The mounting hole section is used to place multiple coaxially stacked annular sheets. The blank has a locking hole section with a larger diameter than the mounting hole section. The locking hole section has an internal thread. The stop nut has a through hole extending along its axis. The stop nut includes a clamping section and a connecting section connected sequentially along its axis. The outer diameter of the connecting section matches the inner diameter of the locking hole section. The connecting section has an external thread. The outer diameter of the clamping section is smaller than the outer diameter of the connecting section but larger than the inner diameter of the annular blank. The connecting section is threadedly connected to the locking hole section. The clamping section is used to press multiple annular blanks within the mounting hole section.

7. The method for processing a tungsten alloy annular thin sheet according to claim 6, characterized in that, In step S5, multiple machined annular sheet blanks are placed in the mounting holes. The connecting section of the stop nut is threaded into the locking hole section, with the clamping section of the stop nut facing the annular sheet blank in the mounting hole section. The stop nut is screwed on to press the clamping section against the multiple annular sheet blanks in the mounting hole section, thus fixing the multiple annular sheet blanks. The boring fixture with multiple annular sheet blanks is mounted on a boring machine. The two ends of the boring sleeve are clamped using the fixture on the boring machine. The boring tool on the boring machine is used to bore the inner hole of the annular sheet blank, so that the hole diameter of the annular sheet blank is machined to the range of the inner hole diameter of the finished annular sheet, thus producing the finished annular sheet.

8. The method for processing a tungsten alloy annular thin sheet according to claim 7, characterized in that, In step S5, after boring the inner hole of the annular sheet blank, the stop nut is removed from the boring inner hole sleeve, and a push rod is inserted along one end of the limiting hole section on the boring inner hole sleeve. The push rod pushes against the annular sheet finished product on the mounting hole section to push out multiple annular sheet finished products in the mounting hole section.

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