CN111451716A - Rough machining process of crossed arc holes - Google Patents
Rough machining process of crossed arc holes Download PDFInfo
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- CN111451716A CN111451716A CN202010237651.8A CN202010237651A CN111451716A CN 111451716 A CN111451716 A CN 111451716A CN 202010237651 A CN202010237651 A CN 202010237651A CN 111451716 A CN111451716 A CN 111451716A
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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
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
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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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Abstract
The invention discloses a rough machining process of crossed arc holes, which comprises a workpiece to be machined, wherein the workpiece comprises a first arc hole, a middle arc hole and a second arc hole which are sequentially arranged in a staggered manner and connected end to end, and the first arc hole and the second arc hole are arranged in a crossed manner and form a first intersection; further comprising the steps of: a1. first preprocessing: removing allowance processing from the front processing surface to the first preprocessing position; b1. second preprocessing: performing allowance machining removal on the second preprocessing position from the reverse machining surface; c1. processing an arc hole: and machining the machining allowance according to the sequence. The invention provides a rough machining process for crossed arc holes, which can avoid the occurrence of opening breakage at intersections of the arc holes without influencing the machining cost, can machine the front side and the back side simultaneously, and increases the machining depth of the arc holes.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a rough machining process of crossed arc holes.
Background
In the machining process, a workpiece needs to be bored or milled, and in the rough machining process, when a plurality of arc holes are crossed, the phenomenon of opening collapse frequently occurs at the intersection of the holes, so that the product quality requirements of customers cannot be met, and the economic benefit is influenced. Therefore, a rough machining process for the crossed arc holes needs to be designed, and the intersection of the arc holes can be prevented from being cracked under the condition that the machining cost is not influenced.
The Chinese patent application publication No. CN109531202A, published as 2019, 03, 29, entitled Shifting fork cross hole processing method for guaranteeing symmetry requirements, discloses a shifting fork cross hole processing method for guaranteeing symmetry requirements, and has the technical core that: defining the upper half part and the lower part of the positioning pin hole as a first pin hole and a second pin hole; and sequentially conducting centering guide on the first pin hole, drilling the first pin hole, conducting centering guide on the second pin hole, drilling the first pin hole, and simultaneously reaming the first pin hole and the second pin hole by using a reamer, thereby finishing the machining of the positioning pin hole. By adopting the invention to process the positioning pin hole of the shifting fork, the deviation of a hole processing cutter in the processing process is overcome by utilizing secondary centering guide, the position degree of a cross hole is ensured, the deviation of verticality is less than 0.05 mm, the deviation of symmetry is less than 0.08 mm, the processing process is stable, and the rejection rate is greatly reduced; the method for processing the fork cross hole has general application value and can be applied to all similar products. However, the patent still has the problems and is not suitable for processing circular arc holes which are crossed side by side.
Disclosure of Invention
The invention provides a rough machining process of crossed arc holes, aiming at overcoming the problem that when a plurality of arc holes are crossed, the phenomenon of opening breakage often occurs at the intersection of the holes and the product quality requirement cannot be met, so that the machining cost is not influenced, the opening breakage at the intersection of the arc holes is avoided, the front side and the back side can be machined simultaneously, and the machining depth of the arc holes is increased.
The second object of the present invention is: the rough machining process for the crossed arc holes is provided, and the crossing of the arc holes can be prevented from being cracked under the condition that the machining cost is not influenced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rough machining process of crossed arc holes comprises a workpiece to be machined, wherein the workpiece comprises first arc holes, middle arc holes and second arc holes which are sequentially arranged in a staggered mode and connected end to end, the first arc holes and the second arc holes are arranged in a crossed mode to form a first intersection, and the circle centers of the first arc holes, the middle arc holes and the second arc holes are sequentially connected to form a machining direction; further comprising the steps of:
a1. first preprocessing: performing allowance machining on a first preprocessing position on one side, close to the second arc hole, of the first intersection from the front machining surface to remove allowance;
b1. second preprocessing: performing allowance machining on a second preprocessing position on one side, close to the first arc hole, of the first intersection from the reverse machining surface to remove allowance;
c1. processing an arc hole: machining the machining allowance according to the following sequence, namely machining a positive machining surface of the first arc hole, a negative machining surface of the second arc hole, a positive machining surface of the middle arc hole, a negative machining surface of the middle arc hole, a positive machining surface of the second arc hole and a negative machining surface of the first arc hole;
d1. and finishing the processing.
In the technical scheme, the rotating direction of the blade is always unchanged in the processing process. Machining allowances are arranged on the side walls of the first arc hole, the middle arc hole and the second arc hole of the workpiece to be machined; when the blade leaves the workpiece from the front machining surface, if the machining allowance of the side wall of the first arc hole is removed firstly and then the machining allowance of the side wall of the second arc hole is removed, the workpiece is stressed too much and is cracked, and the toughness of the material is more serious when the blade is not enough; in the first preprocessing, the local allowance at the position of the blade outlet of the side wall of the second arc hole is removed, so that the mouth collapse can be effectively prevented. If the machining allowance of the side wall of the middle arc hole is removed firstly and then the machining allowance of the side wall of the first arc hole is removed, the workpiece is subjected to overlarge stress and is cracked when the blade leaves the workpiece, and the material toughness is more serious when the blade is not enough; therefore, the processing sequence is adjusted, the first arc hole is processed firstly, and then the middle arc hole is processed, so that the mouth collapse can be effectively prevented. When the surface is machined from the reverse side, the machining principle is the same as that of the machined surface from the front side. The front surface and the back surface are respectively processed, so that the processing depth can be increased, and the arc hole through hole with large depth is processed. The number of the middle arc holes can be multiple, when the number of the middle arc holes is multiple, a first middle arc hole positive processing surface, a last middle arc hole negative processing surface, a second middle arc hole positive processing surface, a penultimate middle arc hole negative processing surface are installed in the processing sequence, and the processing is performed by analogy.
Preferably, when the machining surface of the first arc hole, the machining surface of the intermediate arc hole, and the machining surface of the second arc hole are machined, the machining depths are the same or sequentially increase. When the reverse processing surface of the second arc hole, the reverse processing surface of the middle arc hole and the reverse processing surface of the first arc hole are processed, the processing depth is the same or is gradually increased. Above-mentioned technical scheme can guarantee that the manufacturing procedure in back can get rid of the burr that the manufacturing procedure produced earlier, guarantees processingquality.
Preferably, the machining depth in the first preliminary machining is larger than the machining depth of the second circular-arc hole finish machining surface. According to the technical scheme, the phenomenon that the end section is cracked can be avoided when the positive processing surface of the second arc hole is processed.
Preferably, the machining depth parts of the first arc hole forward machining surface and the first arc hole reverse machining surface are overlapped; the processing depth parts of the middle arc hole forward processing surface and the middle arc hole backward processing surface are overlapped; the processing depth parts of the second arc hole forward processing surface and the second arc hole reverse processing surface are overlapped. According to the technical scheme, the phenomenon that the end section is cracked can be avoided when the first arc hole and the second arc hole are machined.
A rough machining process of crossed arc holes comprises a workpiece to be machined, wherein the workpiece comprises first arc holes, middle arc holes and second arc holes which are sequentially arranged in a staggered mode and connected end to end, the first arc holes and the second arc holes are arranged in a crossed mode to form a first intersection, and the circle centers of the first arc holes, the middle arc holes and the second arc holes are sequentially connected to form a machining direction; further comprising the steps of:
a2. preprocessing: performing allowance machining on a first preprocessing position on one side, close to the second arc hole, of the first intersection to remove allowance;
b2. processing a first arc hole: machining and removing machining allowance of the first arc hole, wherein the rotating direction of the machining blade is the same as the machining direction;
c2. and (3) processing the residual arc hole: machining and removing machining allowance of the middle arc hole and the second arc hole in sequence according to the machining direction;
d2. and finishing the processing.
In the technical scheme, the rotating direction of the cutter is always unchanged in the machining process. Machining allowances are arranged on the side walls of the first arc hole, the middle arc hole and the second arc hole of the workpiece to be machined; if the machining allowance of the side wall of the first arc hole is removed firstly and then the machining allowance of the side wall of the second arc hole is removed, the workpiece is subjected to overlarge stress and is cracked when the blade leaves the workpiece, and the material toughness is more serious when the blade is not enough; in the first preprocessing, the local allowance at the position of the second arc hole blade outlet is removed, so that the mouth collapse can be effectively prevented. If the machining allowance of the side wall of the middle arc hole is removed firstly and then the machining allowance of the side wall of the first arc hole is removed, the workpiece is subjected to overlarge stress and is cracked when the blade leaves the workpiece, and the material toughness is more serious when the blade is not enough; therefore, the processing sequence is adjusted, the first arc hole is processed firstly, and then the middle arc hole is processed, so that the mouth collapse can be effectively prevented.
Preferably, the number of the middle arc holes is plural, and machining allowances of the plural middle arc holes are machined and removed in sequence in the machining direction during machining. The processing sequence of the technical scheme needs to be carried out in sequence according to the processing direction.
Preferably, the machining depth during the preprocessing is not less than the machining depth of the second arc hole. According to the technical scheme, the second arc hole can be prevented from being cracked at the tail end during machining.
A rough machining process of crossed arc holes comprises a workpiece to be machined, wherein the workpiece comprises a first arc hole and a second arc hole which are arranged in a crossed mode to form a first intersection and a second intersection; further comprising the steps of:
a3. preprocessing: processing and removing a first preprocessing position on one side, close to the second arc hole, of the first intersection;
b3. processing a first arc hole: machining and removing machining allowance of the side wall of the first arc hole, wherein the rotating direction of the machining blade is the same as the extending direction from a first intersection to a second intersection on the first arc hole;
c3. processing a second arc hole: machining and removing machining allowance of the side wall of the second arc hole, wherein the rotating direction of the machining blade is the same as the extending direction from a second intersection to a first intersection on the second arc hole;
d3. and finishing the processing.
In the technical scheme, the rotating direction of the cutter is always unchanged in the machining process. Machining allowance is reserved on the side wall of the first arc hole, the side wall of the middle arc hole and the side wall of the second arc hole; if the machining allowance of the side wall of the first arc hole is removed firstly and then the machining allowance of the side wall of the second arc hole is removed, the workpiece is subjected to overlarge stress and is cracked when the blade leaves the workpiece, and the material toughness is more serious when the blade is not enough; in the first preprocessing, the local allowance at the position of the second arc hole blade outlet is removed, so that the mouth collapse can be effectively prevented.
Preferably, the machining depth during the preprocessing is not less than the machining depth of the second arc hole.
The invention has the beneficial effects that: (1) the opening collapse of the intersection of the circular arc hole can be avoided; (2) can be respectively processed from the front surface and the back surface, can increase the processing depth and further process the circular arc hole through hole with large depth.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of the position of the blade during processing in the present invention;
FIG. 4 is a schematic structural view of embodiment 3.
In the figure: the machining device comprises a workpiece 1, a first arc hole 2, a middle arc hole 3, a second arc hole 4, a first intersection 5, a second intersection 6, a front machining surface 7, a reverse machining surface 8, a machining direction 9, a blade 10, a first preprocessing position 11 and a second preprocessing position 12.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1, a rough machining process of crossed arc holes includes a workpiece 1 to be machined, the workpiece 1 includes first arc holes 2, middle arc holes 3 and second arc holes 4 which are sequentially arranged in a staggered manner and connected end to end, the first arc holes 2 and the second arc holes 4 are arranged in a crossed manner and form a first intersection 5, and circle centers of the first arc holes 2, the middle arc holes 3 and the second arc holes 4 are sequentially connected to form a machining direction 9; further comprising the steps of:
a1. first preprocessing: performing allowance machining on a first preprocessing position 11, close to one side of the second arc hole 4, of the first intersection 5 from the front machining surface 7 to remove allowance;
b1. second preprocessing: performing allowance machining on a second preprocessing position 12, close to one side of the first arc hole 2, of the first intersection 5 from the reverse machining surface 8 to remove allowance;
c1. processing an arc hole: machining allowance is machined according to the following sequence, namely a positive machining surface 7 of the first arc hole 2, a reverse machining surface 8 of the second arc hole 4, a positive machining surface 7 of the middle arc hole 3, a reverse machining surface 8 of the middle arc hole 3, a positive machining surface 7 of the second arc hole 4 and a reverse machining surface 8 of the first arc hole 2; when the machining surface 7 of the first arc hole 2, the machining surface 7 of the middle arc hole 3 and the machining surface 7 of the second arc hole 4 are machined, the machining depths are the same or are sequentially increased; when the reverse processing surface 8 of the second arc hole 4, the reverse processing surface 8 of the middle arc hole 3 and the reverse processing surface 8 of the first arc hole 2 are processed, the processing depth is the same or is sequentially increased; the processing depth in the first preprocessing is larger than that of the positive processing surface 7 of the second arc hole 4; the machining depth parts of the front machining surface 7 of the first circular arc hole 2 and the back machining surface 8 of the first circular arc hole 2 are overlapped; the processing depth parts of the positive processing surface 7 of the middle arc hole 3 and the negative processing surface 8 of the middle arc hole 3 are overlapped; the machining depth parts of the positive machining surface 7 and the negative machining surface 8 of the second circular arc hole 4 are overlapped;
d1. and finishing the processing.
In the above technical solution, the rotation direction of the blade 10 is always unchanged during the machining process. As shown in fig. 1, the side walls of a first arc hole 2, a middle arc hole 3 and a second arc hole 4 of a workpiece 1 to be processed are all provided with processing allowances; as shown in fig. 2 and 3, when the machining allowance of the side wall of the first arc hole 2 is removed and then the machining allowance of the side wall of the second arc hole 4 is removed from the front machining surface 7, when the blade 10 is separated from the workpiece 1, the workpiece 1 is subjected to an excessive stress, and is cracked, and the toughness of the material is more serious; in the first preprocessing, the local allowance at the outlet of the side wall blade 10 of the second arc hole 4 is removed, so that the mouth collapse can be effectively prevented. If the machining allowance of the side wall of the middle arc hole 3 is removed firstly, and then the machining allowance of the side wall of the first arc hole 2 is removed, the workpiece 1 is subjected to overlarge stress and is cracked when the blade 10 leaves the workpiece 1, and the material toughness is more serious when the material toughness is insufficient; therefore, the processing sequence is adjusted, the first arc hole 2 is processed firstly, and then the middle arc hole 3 is processed, so that the mouth collapse can be effectively prevented. The machining principle is the same as that of the machined surface 7 from the reverse machined surface 8. The front surface and the back surface are respectively processed, so that the processing depth can be increased, and the arc hole through hole with large depth is processed. The quantity of middle circular arc hole 3 can be a plurality of, and when the quantity of middle circular arc hole 3 was a plurality of, the processing order installation is first in the middle of 3 positive machined surfaces 7 of circular arc hole, last in the middle of 3 negative machined surfaces 8 of circular arc hole, the second in the middle of 3 positive machined surfaces 7 of circular arc hole, last in the middle of 3 negative machined surfaces 8 of circular arc hole, and so on processes.
Example 2:
as shown in fig. 1, the rough machining process of the crossed arc hole comprises a workpiece 1 to be machined, wherein the workpiece 1 comprises a first arc hole 2, a middle arc hole 3 and a second arc hole 4 which are sequentially arranged in a staggered manner and connected end to end, the first arc hole 2 and the second arc hole 4 are arranged in a crossed manner and form a first intersection 5, and the circle centers of the first arc hole 2, the middle arc hole 3 and the second arc hole 4 are sequentially connected to form a machining direction 9; further comprising the steps of:
a2. preprocessing: performing allowance machining on a first preprocessing position 11 on one side, close to the second arc hole 4, of the first intersection 5 to remove allowance;
b2. processing a first arc hole 2: machining and removing machining allowance of the first arc hole 2, wherein the rotating direction of the machining blade 10 is the same as the machining direction 9;
c2. and (3) processing the residual arc hole: machining and removing machining allowance of the middle arc hole 3 and the second arc hole 4 in sequence according to a machining direction 9; the processing depth in the pre-processing is more than or equal to that of the second arc hole 4;
d2. and finishing the processing.
In the technical scheme, the rotating direction of the cutter is always unchanged in the machining process. As shown in fig. 1, the side walls of a first arc hole 2, a middle arc hole 3 and a second arc hole 4 of a workpiece 1 to be processed are all provided with processing allowances; as shown in fig. 3, if the machining allowance of the side wall of the first arc hole 2 is removed first, and then the machining allowance of the side wall of the second arc hole 4 is removed, when the blade 10 is away from the workpiece 1, the workpiece 1 is subjected to an excessive stress, and then the workpiece 1 is cracked, and the toughness of the material is more serious; in the first preprocessing, the local allowance at the outlet of the second arc hole 4 blade 10 is removed, so that the mouth collapse can be effectively prevented. If the machining allowance of the side wall of the middle arc hole 3 is removed firstly, and then the machining allowance of the side wall of the first arc hole 2 is removed, the workpiece 1 is subjected to overlarge stress and is cracked when the blade 10 leaves the workpiece 1, and the material toughness is more serious when the material toughness is insufficient; therefore, the processing sequence is adjusted, the first arc hole 2 is processed firstly, and then the middle arc hole 3 is processed, so that the mouth collapse can be effectively prevented.
Example 3:
as shown in fig. 4, a rough machining process of a crossed arc hole includes a workpiece 1 to be machined, the workpiece 1 includes a first arc hole 2 and a second arc hole 4, and the first arc hole 2 and the second arc hole 4 are arranged in a crossed manner to form a first intersection 5 and a second intersection 6; further comprising the steps of:
a3. preprocessing: processing and removing a first preprocessing position 11 at one side of the first intersection 5, which is close to the second arc hole 4;
b3. processing a first arc hole 2: machining and removing machining allowance of the side wall of the first arc hole 2, wherein the rotating direction of the machining blade 10 is the same as the extending direction from a first intersection 5 to a second intersection 6 on the first arc hole 2;
c3. and (4) processing a second arc hole: machining and removing machining allowance of the side wall of the second arc hole 4, wherein the rotating direction of the machining blade 10 is the same as the extending direction from a second intersection 6 to a first intersection 5 on the second arc hole 4; the processing depth in the pre-processing is more than or equal to that of the second arc hole 4;
d3. and finishing the processing.
In the technical scheme, the rotating direction of the cutter is always unchanged in the machining process. As shown in fig. 4, the side wall of the first arc hole 2, the side wall of the middle arc hole 3 and the side wall of the second arc hole 4 have machining allowance; if the machining allowance of the side wall of the first arc hole 2 is removed firstly and then the machining allowance of the side wall of the second arc hole 4 is removed, the workpiece 1 is subjected to overlarge stress and is cracked when the blade 10 leaves the workpiece 1, and the material toughness is more serious when the material toughness is insufficient; in the first preprocessing, the local allowance at the outlet of the second arc hole 4 blade 10 is removed, so that the mouth collapse can be effectively prevented.
The invention has the beneficial effects that: the opening collapse of the intersection of the circular arc hole can be avoided; can be respectively processed from the front surface and the back surface, can increase the processing depth and further process the circular arc hole through hole with large depth.
Claims (9)
1. A rough machining process of crossed arc holes is characterized by comprising a workpiece to be machined, wherein the workpiece comprises a first arc hole, a middle arc hole and a second arc hole which are sequentially arranged in a staggered mode and connected end to end, the first arc hole and the second arc hole are arranged in a crossed mode to form a first intersection, and the circle centers of the first arc hole, the middle arc hole and the second arc hole are sequentially connected to form a machining direction; further comprising the steps of:
a1. first preprocessing: performing allowance machining on a first preprocessing position on one side, close to the second arc hole, of the first intersection from the front machining surface to remove allowance;
b1. second preprocessing: performing allowance machining on a second preprocessing position on one side, close to the first arc hole, of the first intersection from the reverse machining surface to remove allowance;
c1. processing an arc hole: machining the machining allowance according to the following sequence, namely machining a positive machining surface of the first arc hole, a negative machining surface of the second arc hole, a positive machining surface of the middle arc hole, a negative machining surface of the middle arc hole, a positive machining surface of the second arc hole and a negative machining surface of the first arc hole;
d1. and finishing the processing.
2. The roughing process of an intersecting circular arc hole as claimed in claim 1, wherein the machining depth is the same or gradually increased when the machining surface of the first circular arc hole, the machining surface of the middle circular arc hole and the machining surface of the second circular arc hole are machined.
3. The roughing process of a crossed circular arc hole as claimed in claim 1, wherein the machining depth at the first preliminary machining is larger than the machining depth of the positive machining face of the second circular arc hole.
4. The rough machining process of the crossed circular arc hole as claimed in claim 1, 2 or 3, wherein the machining depth of the first circular arc hole forward machining surface is partially overlapped with that of the first circular arc hole reverse machining surface; the processing depth parts of the middle arc hole forward processing surface and the middle arc hole backward processing surface are overlapped; the processing depth parts of the second arc hole forward processing surface and the second arc hole reverse processing surface are overlapped.
5. A rough machining process of crossed arc holes is characterized by comprising a workpiece to be machined, wherein the workpiece comprises a first arc hole, a middle arc hole and a second arc hole which are sequentially arranged in a staggered mode and connected end to end, the first arc hole and the second arc hole are arranged in a crossed mode to form a first intersection, and the circle centers of the first arc hole, the middle arc hole and the second arc hole are sequentially connected to form a machining direction; further comprising the steps of:
a2. preprocessing: performing allowance machining on a first preprocessing position on one side, close to the second arc hole, of the first intersection to remove allowance;
b2. processing a first arc hole: machining and removing machining allowance of the first arc hole, wherein the rotating direction of the machining blade is the same as the machining direction;
c2. and (3) processing the residual arc hole: machining and removing machining allowance of the middle arc hole and the second arc hole in sequence according to the machining direction;
d2. and finishing the processing.
6. The roughing process of the crossed circular arc holes as claimed in claim 5, wherein the number of the middle circular arc holes is plural, and machining allowance of the plural middle circular arc holes is sequentially machined and removed according to the machining direction during machining.
7. The roughing process of a crossed arc hole as claimed in claim 5, wherein the machining depth at the time of preprocessing is greater than or equal to the machining depth of the second arc hole.
8. A rough machining process of crossed arc holes is characterized by comprising a workpiece to be machined, wherein the workpiece comprises a first arc hole and a second arc hole which are arranged in a crossed mode to form a first intersection and a second intersection; further comprising the steps of:
a3. preprocessing: processing and removing a first preprocessing position on one side, close to the second arc hole, of the first intersection;
b3. processing a first arc hole: machining and removing machining allowance of the side wall of the first arc hole, wherein the rotating direction of the machining blade is the same as the extending direction from a first intersection to a second intersection on the first arc hole;
c3. processing a second arc hole: machining and removing machining allowance of the side wall of the second arc hole, wherein the rotating direction of the machining blade is the same as the extending direction from a second intersection to a first intersection on the second arc hole;
d3. and finishing the processing.
9. The roughing process of a crossed circular arc hole as claimed in claim 8, wherein the machining depth at the time of the preprocessing is greater than or equal to the machining depth of the second circular arc hole.
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| CN202010237651.8A CN111451716B (en) | 2020-03-30 | 2020-03-30 | Rough machining process of crossed arc holes |
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| CN202010237651.8A CN111451716B (en) | 2020-03-30 | 2020-03-30 | Rough machining process of crossed arc holes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008080457A (en) * | 2006-09-28 | 2008-04-10 | Hitachi Via Mechanics Ltd | Outer shape machining method |
| CN103537723A (en) * | 2012-07-11 | 2014-01-29 | 上海沪江柴油机排放检测科技有限公司 | Method for manufacturing common-rail overlapping double-hole type high-pressure fuel pipe of diesel engine |
| CN107984723A (en) * | 2017-11-15 | 2018-05-04 | 都江堰市江宁机械有限公司 | Bimetal cylinder processing technology |
| CN208575294U (en) * | 2018-07-19 | 2019-03-05 | 烟台万隆真空冶金股份有限公司 | A kind of second hole machined component in 8 word hole |
| CN109531202A (en) * | 2018-11-30 | 2019-03-29 | 湖北华阳汽车变速系统股份有限公司 | Guarantee that the shift fork that symmetry requires intersects hole processing technical method |
-
2020
- 2020-03-30 CN CN202010237651.8A patent/CN111451716B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008080457A (en) * | 2006-09-28 | 2008-04-10 | Hitachi Via Mechanics Ltd | Outer shape machining method |
| CN103537723A (en) * | 2012-07-11 | 2014-01-29 | 上海沪江柴油机排放检测科技有限公司 | Method for manufacturing common-rail overlapping double-hole type high-pressure fuel pipe of diesel engine |
| CN107984723A (en) * | 2017-11-15 | 2018-05-04 | 都江堰市江宁机械有限公司 | Bimetal cylinder processing technology |
| CN208575294U (en) * | 2018-07-19 | 2019-03-05 | 烟台万隆真空冶金股份有限公司 | A kind of second hole machined component in 8 word hole |
| CN109531202A (en) * | 2018-11-30 | 2019-03-29 | 湖北华阳汽车变速系统股份有限公司 | Guarantee that the shift fork that symmetry requires intersects hole processing technical method |
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