CN112264648A - Machining method of T-shaped clamping rod - Google Patents
Machining method of T-shaped clamping rod Download PDFInfo
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- CN112264648A CN112264648A CN202010920011.7A CN202010920011A CN112264648A CN 112264648 A CN112264648 A CN 112264648A CN 202010920011 A CN202010920011 A CN 202010920011A CN 112264648 A CN112264648 A CN 112264648A
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- shaped clamping
- clamping rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/12—Boron nitride
Abstract
The invention relates to a method for processing a T-shaped clamping rod, which comprises the following steps of 1) cutting a cuboid boron nitride blank by using a cutter; 2) mounting a blank on a milling machine, grinding and milling six surfaces of the blank by using a grinding tool to form a T-shaped surface, wherein a step surface is firstly processed in the processing process, and two side surfaces are processed; 3) and (3) turning the blank with the processed T-shaped surface upside down, mounting the blank on a milling machine again, and grinding the allowance in the height direction by using a grinding tool of the milling machine to obtain a final T-shaped clamping rod finished product. The processing method of the T-shaped clamping rod realizes the localization of the processing of the clamping rod, simultaneously ensures the processing precision requirement and realizes the reliable assembly of the slow wave circuit. The milling machine grinding tool is used for high-speed cutting, and the high-speed cutting device has reliable and excellent processing effect, high processing efficiency and low processing cost.
Description
Technical Field
The invention relates to a method for processing a T-shaped clamping rod, in particular to a method for processing a T-shaped clamping rod between a helix traveling wave tube and a tube shell, and belongs to the technical field of microwave vacuum electronics.
Background
Helix traveling wave tube plays indispensable effect in communication and electron countermeasure, and the supporting transition piece between helix traveling wave tube and the tube is regarded as to the supporting pole among its slow wave circuit, plays the heat conduction effect simultaneously, in time conducts the heat that produces intraductal to the tube surface. Two widely used materials in the traveling wave tube are beryllium oxide and anisotropic boron nitride, the two materials have high thermal conductivity, and the trend that the thermal conductivity of the boron nitride ceramic is reduced along with the rise of temperature is relatively small, so that the boron nitride ceramic has good high-temperature thermal conductivity and is applied to replace the toxic beryllium oxide ceramic material in recent years.
The clamping rod is made of an anisotropic pyrolytic boron nitride material which is white, non-toxic, free of pores, easy to process, compact in surface, good in air tightness, high-temperature resistant, good in heat conductivity and low in thermal expansion coefficient. The graphite is prepared by a chemical vapor deposition method, is called white graphite, has a layered structure, has excellent machining performance and is easy to delaminate. Because of factors such as purity, air release performance and the like, the production of the material has a bottleneck, always depends on import, and has long processing period and high price.
The T-shaped clamping rod is processed with the following difficulties:
1. the size is small, the precision requirement is high, the height of the clamping rod is generally less than 1mm, and the tolerance precision is 5 mu m;
2. all surfaces need to be processed from large size to small size, and each surface needs to be processed, positioned and clamped difficultly;
3. the middle T-shaped part is required to be centered, and has small size and high precision requirement;
therefore, in order to solve the problem of difficult processing of the T-shaped clamping rod, it is necessary to design a processing method to realize localization of the T-shaped clamping rod as early as possible and get rid of import dependence.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for processing a T-shaped clamping rod.
The technical scheme of the invention is as follows:
a processing method of a T-shaped clamping rod comprises the following steps:
1) firstly, cutting a cuboid boron nitride blank by using a cutter;
2) mounting a blank on a milling machine, grinding and milling six surfaces of the blank by using a grinding tool to form a T-shaped surface, wherein a step surface is firstly processed in the processing process, and two side surfaces are processed;
in the processing process, grinding tool parameter selection: the rotating speed is 6000-;
the height of the processed T-shaped surface is 0.6-1.3mm, the height of the small end is 0.1-0.4mm, and the width is 0.15-0.35 mm;
3) and (3) turning the blank with the processed T-shaped surface upside down, mounting the blank on a milling machine again, and grinding the allowance in the height direction by using a grinding tool of the milling machine to obtain a final T-shaped clamping rod finished product.
Preferably, in the step 1), the length of the blank is 90-190mm, the width is 0.9-1.6mm, and the height is 0.5-0.8 mm;
preferably, in the step 2), the blank is installed between soft stoppers on a milling machine, and the soft stoppers are made of die steel.
Preferably, in the step 2), the rotating speed is 18000r/min, the feeding speed is 10m/s, and the feeding amount is 0.02 mm.
Preferably, in step 2), the grinding tool is fed a plurality of times while machining the step surface and both side surfaces, and the feed amount is sequentially reduced.
Preferably, in step 2), the grinding tool is fed 3 times while machining the step surface and both side surfaces.
The invention has the beneficial effects that:
1. the processing method of the T-shaped clamping rod realizes the localization of the processing of the clamping rod, simultaneously ensures the processing precision requirement and realizes the reliable assembly of the slow wave circuit.
2. The machining method of the T-shaped clamping rod utilizes the milling machine grinding tool to perform high-speed cutting machining, has reliable and excellent machining effect, and is high in machining efficiency and low in machining cost.
Drawings
FIG. 1 is a schematic structural view of a machined blank;
FIG. 2 is a schematic structural view of a T-shaped clamping rod machined on a blank;
FIG. 3 is a schematic structural view of the T-shaped clamping rod after final machining and forming;
wherein: 1-blank, 2-stop block and 3-T-shaped clamping rod.
Detailed Description
The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.
Example 1:
the embodiment provides a method for processing a T-shaped clamping rod, which comprises the following steps:
1) firstly, cutting a cuboid boron nitride blank by using a cutter; as shown in fig. 1, the length of the blank is 90-190mm, the width W is 0.9-1.6mm, and the height H is 0.5-0.8 mm;
2) mounting a blank between soft stop blocks on a milling machine, grinding and milling six surfaces of the blank by using a grinding tool to form a T-shaped surface, wherein step surfaces are firstly processed and two side surfaces are processed in the processing process; because the boron nitride blank is of a layered structure, in the machining process, the acting force between the cutter and the blank easily causes edge delamination, and the two side faces are machined later, so that the delamination part at the edge of the step face can be directly removed, and a good machining effect is ensured.
In the processing process, grinding tool parameter selection: the rotating speed is 6000r/min, the feeding speed is 5m/s, and the feeding amount is 0.01 mm;
the height of the processed T-shaped surface is 0.6mm, the height H1 of the small end is 0.1mm, and the width W1 is 0.15 mm;
3) and (3) turning the blank with the processed T-shaped surface upside down, mounting the blank on a milling machine again, and grinding the allowance in the height direction by using a grinding tool of the milling machine to obtain a final T-shaped clamping rod finished product.
The soft stop dog is made of die steel, and accidental damage to a blank in the machining process is avoided. The die steel is not easy to deform, the processing parallelism is less than or equal to 0.02mm, the stress of the blank to be processed is ensured to be uniform, and the fracturing damage is avoided.
When the step surface and the side surfaces on the two sides are machined, the grinding tool is fed for 3 times, the feeding amount is reduced in sequence, and when the machining target amount is approached, the feeding amount is minimum, and the target size is machined.
Example 2:
the processing method of the T-shaped clamping rod comprises the following steps as described in embodiment 1, and is different from the following steps: in the step 2), the rotating speed is 18000r/min, the feeding speed is 10m/s, and the feeding amount is 0.02 mm.
Example 3:
the processing method of the T-shaped clamping rod comprises the following steps as described in embodiment 1, and is different from the following steps: in the step 2), in the processing process, grinding tool parameters are selected: the rotating speed is 30000r/min, the feeding speed is 15m/s, and the feeding amount is 0.03 mm; the height of the processed T-shaped surface is 1.3mm, the height of the small end is 0.4mm, and the width is 0.35 mm.
The above description is only for the specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (6)
1. A processing method of a T-shaped clamping rod is characterized by comprising the following steps:
1) firstly, cutting a cuboid boron nitride blank by using a cutter;
2) mounting a blank on a milling machine, grinding and milling six surfaces of the blank by using a grinding tool to form a T-shaped surface, wherein a step surface is firstly processed in the processing process, and two side surfaces are processed;
in the processing process, grinding tool parameter selection: the rotating speed is 6000-;
the height of the processed T-shaped surface is 0.6-1.3mm, the height of the small end is 0.1-0.4mm, and the width is 0.15-0.35 mm;
3) and (3) turning the blank with the processed T-shaped surface upside down, mounting the blank on a milling machine again, and grinding the allowance in the height direction by using a grinding tool of the milling machine to obtain a final T-shaped clamping rod finished product.
2. The method as claimed in claim 1, wherein in step 1), the blank has a length of 90-190mm, a width of 0.9-1.6mm and a height of 0.5-0.8 mm.
3. A method of forming a T-shaped clamp bar as claimed in claim 1, wherein in step 2), the blank is mounted between flexible stops formed of die steel on a milling machine.
4. The method for processing T-shaped clamping rods as recited in claim 1, wherein in the step 2), the rotating speed is 18000r/min, the feeding speed is 10m/s, and the feeding amount is 0.02 mm.
5. The method of processing a T-shaped clamping bar according to claim 1, wherein in the step 2), the grinding tool is fed in a plurality of times while processing the step surface and both side surfaces, and the feed amount is sequentially decreased.
6. The method of processing a T-shaped clamping bar according to claim 5, wherein in the step 2), the grinding tool is fed 3 times in processing the step surface and both side surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010920011.7A CN112264648B (en) | 2020-09-04 | 2020-09-04 | Machining method of T-shaped clamping rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010920011.7A CN112264648B (en) | 2020-09-04 | 2020-09-04 | Machining method of T-shaped clamping rod |
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| CN112264648A true CN112264648A (en) | 2021-01-26 |
| CN112264648B CN112264648B (en) | 2022-09-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196012A (en) * | 2015-09-23 | 2015-12-30 | 四川飞亚汽车零部件有限公司 | Novel process for processing crankshaft |
| US20160040279A1 (en) * | 2013-03-29 | 2016-02-11 | Sumitomo Electric Hardmetal Corp. | Surface-coated boron nitride sintered body tool |
| CN106312474A (en) * | 2016-11-24 | 2017-01-11 | 陕西启源科技发展有限责任公司 | Method for machining large-diameter thin-wall coupling shaft |
-
2020
- 2020-09-04 CN CN202010920011.7A patent/CN112264648B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160040279A1 (en) * | 2013-03-29 | 2016-02-11 | Sumitomo Electric Hardmetal Corp. | Surface-coated boron nitride sintered body tool |
| CN105196012A (en) * | 2015-09-23 | 2015-12-30 | 四川飞亚汽车零部件有限公司 | Novel process for processing crankshaft |
| CN106312474A (en) * | 2016-11-24 | 2017-01-11 | 陕西启源科技发展有限责任公司 | Method for machining large-diameter thin-wall coupling shaft |
Non-Patent Citations (1)
| Title |
|---|
| 董笑瑜等: "《带圆弧面斜T型氮化硼夹持杆的加工工艺》", 《真空电子技术》 * |
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