CN112517967A - Cambered surface inclined hole processingequipment - Google Patents
Cambered surface inclined hole processingequipment Download PDFInfo
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- CN112517967A CN112517967A CN202011360089.4A CN202011360089A CN112517967A CN 112517967 A CN112517967 A CN 112517967A CN 202011360089 A CN202011360089 A CN 202011360089A CN 112517967 A CN112517967 A CN 112517967A
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- cambered surface
- inclined hole
- cutter
- hole
- surface inclined
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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
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
- B23Q16/02—Indexing equipment
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- Drilling And Boring (AREA)
Abstract
The invention provides a cambered surface inclined hole machining device which comprises an index plate, a limiting device and a cutter handle, wherein the first end of the limiting device is connected with the index plate, the cross section of the second end of the limiting device is conical, a workpiece clamping hole along the plate surface normal direction of the index plate is arranged at the conical end part, the included angle between the conical inclined surface and the plate surface normal direction of the index plate is the same as the included angle between the plate surface normal direction of the index plate and the horizontal direction, a guide hole is vertically arranged on the inclined surface and is communicated with the workpiece clamping hole, and the guide hole is positioned below the cutter handle. When the device is used for processing the cambered surface inclined hole, the shaft workpiece can be ensured not to deform during processing, the cutter on the cutter handle is ensured not to deflect and break, the problems of easy abrasion, short service life and the like of the cutter in the drilling process can be effectively solved, and the processing quality of the cambered surface inclined hole is ensured.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a cambered surface inclined hole machining device.
Background
In the aerospace industry, a large number of slender shaft workpieces exist, and the workpieces have the mechanical characteristics of small diameter, generally 0.5-10mm, and large length-diameter ratio. Due to the requirement of use conditions, the cambered surfaces of the slender shaft workpieces are often required to be processed with series of holes, so that the workpieces are difficult to process and high in rejection rate. The most difficult process is the processing of a micro inclined hole with a large length-diameter ratio drilled in an arc surface. The traditional electric spark machining has low efficiency, large loss of a machining device and high cost. In the traditional mechanical processing, because of the limitation of the size of a tiny hole, finishing processes such as reaming, grinding and the like are difficult to be adopted to improve the hole processing quality, the hole is generally formed by one-time drilling, and extremely high requirements are provided for the drilling technology. More difficult, in the drilling of the inclined small hole of the cambered surface, the drill point is difficult to center when the drill is drilled, and the drill point slips, is broken and the like, so that the processing cannot be carried out. Therefore, in the prior art, a milling cutter is generally used for milling a machining plane, then a center hole is drilled, and drilling operation is performed, so that the problem of machining can be solved to a certain extent, but defects can be formed on the surface of a shaft workpiece: when the inclined hole is drilled, a V-shaped groove can be formed on the shaft cambered surface by a processing plane drilled by the drill bit, the overall strength, the distribution of rotational inertia and the like are seriously influenced, and the technical requirements cannot be met.
Disclosure of Invention
The invention provides a cambered surface inclined hole processing device, which can ensure that shaft workpieces are not deformed during processing when a common cambered surface inclined hole or a cambered surface inclined hole under special conditions in the prior art is processed, ensure that a cutter on a cutter handle is not deflected and broken, effectively solve the problems of easy abrasion, short service life and the like of the cutter in the drilling process, and ensure the processing quality of the cambered surface inclined hole.
The invention provides a cambered surface inclined hole machining device which comprises an index plate, a limiting device and a cutter handle, wherein the first end of the limiting device is connected with the index plate, the cross section of the second end of the limiting device is conical, a workpiece clamping hole along the plate surface normal direction of the index plate is arranged at the conical end part, the included angle between the conical inclined surface and the plate surface normal direction of the index plate is the same as the included angle between the plate surface normal direction of the index plate and the horizontal direction, a guide hole is vertically arranged on the inclined surface and is communicated with the workpiece clamping hole, and the guide hole is positioned below the cutter handle.
According to the cambered surface inclined hole machining device provided by the invention, the guide hole comprises a reducing section and a constant diameter section, the reducing section is positioned at the upper part of the constant diameter section, the aperture of the reducing section is larger than that of the constant diameter section, and the constant diameter section is in clearance fit with a cutter on the cutter handle.
According to the cambered surface inclined hole machining device provided by the invention, the included angle between the cambered surface of the reducing section and the vertical direction is 0-10 degrees.
According to the cambered surface inclined hole machining device provided by the invention, the number of the guide holes is multiple.
According to the cambered surface inclined hole machining device provided by the invention, the tool handle comprises an ultrasonic tool handle.
According to the cambered surface inclined hole machining device provided by the invention, the cutter comprises: drill bits, milling cutters, or grinding bits.
According to the cambered surface inclined hole machining device provided by the invention, the limiter comprises a first main body and a second main body, a first open slot is formed in the end part of the second end of the first main body, a second open slot is formed in the end part of the second end of the second main body, and the first open slot and the second open slot are combined to form the workpiece clamping hole.
According to the cambered surface inclined hole machining device provided by the invention, the limiter further comprises a bolt and a nut, threaded lugs are respectively arranged on two sides of the first main body and two sides of the second main body, and the bolt is positioned in the two threaded lugs on the same side and connected with the nut.
According to the cambered surface inclined hole machining device provided by the invention, the first end of the limiter is fixedly connected with the three-jaw chuck in the middle of the dividing plate.
According to the cambered surface inclined hole machining device provided by the invention, the central axis of the workpiece clamping hole and the central axis of the limiter are superposed with the central axis of the dividing plate.
According to the cambered inclined hole machining device provided by the invention, the included angle between the conical inclined surface of the limiting stopper and the disc surface normal direction of the dividing disc and the included angle between the disc surface normal direction of the dividing disc and the horizontal direction are set to be the same, so that the angle of the cambered inclined hole to be machined of a workpiece is the included angle between the disc surface normal direction of the dividing disc and the horizontal direction, namely the inclined angle of the dividing disc, the machining angle of the cambered inclined hole can be accurately controlled by adjusting the inclined angle of the dividing disc, the cutter on the cutter handle is limited through the guide hole vertically arranged on the inclined surface, the cutter cannot be deflected and broken, the problems that the cutter is easy to wear and short in service life in the drilling process can be effectively solved, and the machining quality of the cambered inclined hole is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for 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 is a structural assembly view of the cambered surface inclined hole machining device provided by the invention;
FIG. 2 is a cross-sectional view taken at A of FIG. 1;
FIG. 3 is a schematic structural view of a guide hole provided by the present invention;
FIG. 4 is a schematic structural view of an ultrasonic blade handle provided by the present invention;
FIG. 5 is a schematic structural view of a stopper provided in the present invention;
FIG. 6 is a top view of FIG. 5;
reference numerals:
1: a machine tool table; 2: a machine tool spindle; 3: an index plate;
301: a three-jaw chuck; 4: a stopper; 401: a first end of a stopper;
402: a workpiece clamping hole; 403: a tapered inclined surface; 404: a guide hole;
4041: a reducing section; 4042: a constant diameter section; 405: a front plate;
406: a back plate; 407: a first slot; 408: a second slot;
5: a threaded earring; 6: a bolt; 7: a nut;
8: a knife handle; 801: a knife handle body; 802: an ultrasonic ring energy device;
803: an amplitude transformer; 804: a cutter; 9: and (5) a workpiece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, 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.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The technical scheme of the cambered surface inclined hole machining device is described in the following with reference to fig. 1-6.
As shown in figure 1, the invention provides a cambered surface inclined hole machining device which mainly comprises an index plate 3, a limiter 4 and a cutter handle 8 capable of moving up and down.
The index plate is a tiltable rotary index plate, namely, the index plate can adjust the inclination angle and the rotation angle, has the rotation around the normal direction of a Z axis and also has the inclination angle rotating around a Y axis, in the figure 1, the index plate has the functions of the inclination rotation in the alpha direction and the rotation in the beta direction, and the index plate 3 is arranged on the machine tool workbench 1 and can be detached or adjusted in position as required. The working principle of the index plate is conventional in the field of the invention, and is not described herein again.
The first end 401 of the stopper is fixedly connected with the three-jaw chuck 301 at the center of the index plate, and the position of the stopper 4 can be adjusted by adjusting the position of the index plate 3, in other words, the index plate performs the inclined rotation in the alpha direction and the rotary motion in the beta direction, and the stopper follows the index plate to perform the same motion.
As shown in fig. 1, 2 and 5, the cross section of the second end of the stopper is conical, the end of the conical end is provided with a workpiece clamping hole 402 along the normal direction of the disk surface of the index disk, the included angle between the conical inclined surface 403 and the normal direction of the disk surface of the index disk is the same as the included angle α between the normal direction of the disk surface of the index disk and the horizontal direction, the inclined angle α of the index disk is the angle for processing the inclined hole of the cambered surface through the arrangement of the above structures and positions, and the processing precision of the whole device is improved by using the index disk.
A guide hole 404 is vertically arranged on the inclined surface, the guide hole 404 is communicated with the workpiece clamping hole 402, and the guide hole 404 is positioned below the tool holder 8, specifically: when the workpiece needs to be subjected to cambered surface inclined hole machining, the index plate drives the limiting device to enable the guide hole to be located at a machining station, and at the moment, the guide hole is arranged just opposite to the lower portion of the cutter on the cutter handle. According to the invention, the cutter on the cutter handle is limited through the guide hole, and the cutter is always limited by the guide hole in the machining process, so that deviation and breakage cannot occur, the problems of easy abrasion, short service life and the like of the cutter in the drilling process can be effectively solved, and the machining quality of the cambered surface inclined hole is ensured.
It can be understood that, in the conventional inclined hole machining technology, when the cutter contacts the arc surface of the inclined hole, the cutter is subjected to forces in other directions besides the axial direction of the cutter, so that the cutter slips and is dislocated, and the machining precision is insufficient; however, in the present invention, by providing a vertical guide hole, as shown in fig. 3, the guide hole 404 includes a reduced diameter section 4041 and a constant diameter section 4042, the reduced diameter section 4041 is located at the upper portion of the constant diameter section 4042, the reduced diameter section is a tapered hole with a wide upper portion and a narrow lower portion, in this embodiment, an included angle θ between the arc surface of the reduced diameter section and the vertical direction is 0 ° to 10 °, so as to facilitate the tool to enter the guide hole more easily. In addition, the specific included angle between the taper hole of the reducing section and the vertical direction is not suitable to be too large, if the included angle is too large, the cutter can enter the guide hole more easily, but the upper part of the cutter cannot be limited well, therefore, the included angle theta is set to be 0-10 degrees, on one hand, the limiting effect can be effectively improved, and on the other hand, the cutter can enter the guide hole conveniently.
Further, constant diameter section 4042 is the cylinder hole, the aperture of constant diameter section is less than the aperture of reducing section, and the cutter just can get into in the constant diameter section through reducing section like this, the constant diameter section with cutter clearance fit on the handle of a knife, the cutter is vertical decurrent when the hand-hole to through bullport and cutter clearance fit, can carry out spacing to the cutter all the time, solved effectively that the cutter can misplace and the position machining precision of cambered surface inclined hole is not enough when processing cambered surface inclined hole problem.
The direction of the workpiece clamping hole is the same as the normal direction of the disk surface of the index disk, so that the cross section of the bottom of the constant-diameter section is an inclined plane matched with the workpiece, the inclined direction of the inclined plane is the same as the normal direction of the disk surface of the index disk, the bottom surface of the guide hole is always abutted to the cambered surface of the workpiece, a cutter cannot be deflected when drilling, and the machining precision of the cambered-surface inclined hole is improved.
Based on the embodiment, the structure of the limiting stopper is arranged, so that the defect that the shaft workpiece is processed like a drilling plane in the prior art can be overcome, and the strength and the integrity of the workpiece are ensured.
As a further improvement, the central axis of the workpiece clamping hole and the central axis of the stopper coincide with the central axis of the index plate, so that the machining precision can be further improved.
As shown in figure 1, the tool holder 8 is connected with a main shaft 2 of a machine tool, the machine tool drives the tool holder to move up and down and rotationally drill, a shaft workpiece 9 to be machined is clamped in a workpiece clamping hole 402 of a limiter 4, the stopper 4 is fixed on the index plate 3 through the three-jaw chuck 301, the position of the index plate is adjusted, the guide hole 404 on the inclined surface 403 of the stopper is vertically upward, after the tool setting operation is carried out on the machine tool, the tool 804 passes through the guide hole 404 on the limiting device through a numerical control program or manual operation, accurately contacts with the circumferential surface of the shaft workpiece 9 to be processed, the cutter is continuously fed to achieve the purpose of drilling, after one hole is processed, and adjusting the scales on the index plate to reach the angle between the hole systems required by the design, rotating the index plate to drive the limiting device to rotate to the next unprocessed hole, aligning the next guide hole with the cutter, and repeating the steps. Therefore, the device can process a plurality of circumferential arc-surface inclined holes at one time and effectively ensure the position precision among the plurality of arc-surface inclined holes.
The specific type of the knife handle is not particularly limited, and the knife handle can be an ultrasonic knife handle or a common knife handle.
As shown in fig. 4, the ultrasonic blade handle includes: the ultrasonic scalpel comprises a hilt body 801, an ultrasonic transducer 802 and an amplitude transformer 803, wherein the ultrasonic transducer is installed on the amplitude transformer and located below the hilt body, electrode plates and piezoelectric ceramic sheets are installed in the ultrasonic transducer, the electrode plates and the piezoelectric ceramic sheets are installed in a plurality of overlapping and staggered modes, a tool head is installed below the amplitude transformer, and the tool head is used for clamping a tool 804.
According to some embodiments of the invention, the tool provided on the shank of the present invention includes a drill, a milling cutter, a grinding head, and the like.
The working principle of the ultrasonic knife handle is the conventional technology in the field, and mainly comprises the following steps: the piezoelectric ceramic piece converts the electric signal into mechanical vibration, and the mechanical vibration is amplified, so that when a cutter acts on a workpiece, intermittent cutting can be realized, and the cutting force, the cutting temperature and the cutter abrasion can be reduced.
As shown in fig. 5 and 6, in this embodiment, the retainer includes a first main body front plate 405, a second main body rear plate 406, a bolt 6 and a nut 7, the end of the second end of the front plate is provided with a first slot 407, the end of the second end of the rear plate is provided with a second slot 408, and the first slot 407 and the second slot 408 combine to form the workpiece holding hole 402. And threaded earrings 5 are respectively arranged on two sides of the front plate and two sides of the rear plate, and the bolts are positioned in the two threaded earrings on the same side and are connected with the nuts. Therefore, when the design is carried out, the two main bodies are two half main bodies which are arranged in a symmetrical structure, and the first open slot and the second open slot are both semicircular arc-shaped openings. During installation, the limiting device is firstly divided into two parts, the shaft type workpiece to be machined is placed into the clamping holes in the front plate or the rear plate, then the limiting device is combined and fixed by bolts, the workpiece is convenient to clamp, and the clamping holes are in transition fit with the shaft type workpiece 9 to be machined, so that the workpiece 9 is prevented from rotating.
In this embodiment, the number of the guide holes 404 is three, two guide holes are formed on the inclined surface of the front plate 405, and one guide hole is formed on the inclined surface of the rear plate 406. It is understood that the number of the guide holes is not particularly limited, and the guide holes are correspondingly arranged according to the number of the arc inclined holes in the actual processing situation.
According to the specific embodiment of the invention, three 45-degree inclined holes which are uniformly distributed in a circular manner are processed on the cambered surface of the shaft workpiece. The device comprises an ultrasonic knife handle, a limiter 4 and an index plate 3 from top to bottom, wherein a shaft workpiece 9 to be machined is clamped in the limiter 4, the limiter 4 is fixed on the index plate 3, the index plate 3 is arranged on a machine tool workbench 1, the position and the angle of the index plate are adjusted, the included angle alpha between the index plate and the horizontal direction is 45 degrees, a cutter is enabled to correspond to a guide hole 404 on the limiter, and the ultrasonic knife handle is connected with a machine tool spindle 2. After the position is adjusted, the machine tool is started, the cutter 804 slowly passes through the guide hole 404 on the limiting stopper to accurately contact with the circumferential surface of the shaft workpiece 9 to be machined, the cutter is continuously fed to start cutting the shaft workpiece 9 to be machined, the purpose of drilling is achieved, after one hole is machined, the cutter is withdrawn, the indexing disc is adjusted to rotate 120 degrees along the beta direction, the next unprocessed hole is rotated, the next guide hole is aligned with the cutter, and the previous step is repeated.
Based on the embodiment, the device reduces the deformation of the shaft workpiece during machining, ensures the accuracy of the cutter during drilling, avoids deviation of the cutter, protects the cutter, and improves the machining quality of the cambered surface inclined hole.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; 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 (10)
1. A cambered surface inclined hole machining device comprises an index plate, a limiter and a cutter handle, and is characterized in that,
the first end of the limiting stopper is connected with the dividing plate, the cross section of the second end of the limiting stopper is conical, the conical end is provided with a workpiece clamping hole along the plate surface normal direction of the dividing plate, the included angle between the conical inclined surface and the plate surface normal direction of the dividing plate is the same as the included angle between the plate surface normal direction of the dividing plate and the horizontal direction, a guide hole is vertically formed in the inclined surface and communicated with the workpiece clamping hole, and the guide hole is located below the cutter handle.
2. The cambered surface inclined hole machining device for machining the inclined hole is characterized in that the guide hole comprises a reducing section and a constant diameter section, the reducing section is located at the upper part of the constant diameter section, the diameter of the reducing section is larger than that of the constant diameter section, and the constant diameter section is in clearance fit with a cutter on the cutter handle.
3. The cambered surface inclined hole processing device according to claim 2, wherein the included angle between the cambered surface of the reducing section and the vertical direction is in the range of 0-10 degrees.
4. The arc-surface inclined hole machining device according to claim 1, wherein the guide hole is provided in a plurality.
5. The cambered surface inclined hole machining device according to claim 1, wherein the tool shank comprises an ultrasonic tool shank.
6. The cambered surface inclined hole machining device according to claim 2, wherein the cutter comprises: drill bits, milling cutters, or grinding bits.
7. The cambered surface inclined hole machining device according to claim 1, wherein the stopper comprises a first body and a second body, a first slot is formed at the end of the second end of the first body, a second slot is formed at the end of the second body, and the first slot and the second slot are combined to form the workpiece clamping hole.
8. The cambered surface inclined hole machining device according to claim 7, wherein the stopper further comprises a bolt and a nut, threaded lugs are respectively arranged on two sides of the first body and two sides of the second body, and the bolt is positioned in the two threaded lugs on the same side and connected with the nut.
9. The cambered surface inclined hole machining device according to claim 1, wherein the first end of the stopper is fixedly connected with a three-jaw chuck in the middle of the index plate.
10. The arc-surface inclined hole machining device according to any one of claims 1 to 9, wherein the central axis of the workpiece clamping hole and the central axis of the stopper coincide with the central axis of the index plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011360089.4A CN112517967A (en) | 2020-11-27 | 2020-11-27 | Cambered surface inclined hole processingequipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011360089.4A CN112517967A (en) | 2020-11-27 | 2020-11-27 | Cambered surface inclined hole processingequipment |
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| CN112517967A true CN112517967A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011360089.4A Pending CN112517967A (en) | 2020-11-27 | 2020-11-27 | Cambered surface inclined hole processingequipment |
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| CN (1) | CN112517967A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894188A (en) * | 2022-07-14 | 2022-08-12 | 中国船舶重工集团公司第七0七研究所 | Table body for hemispherical resonator gyroscope inertial navigation system and processing method thereof |
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| US20030123941A1 (en) * | 2001-12-31 | 2003-07-03 | Emerson Eugene E. | Pocket hole drilling and screw installation jig for workpieces |
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| CN107775383A (en) * | 2016-08-25 | 2018-03-09 | 天津宝涞精工集团股份有限公司 | A kind of clamping device for being exclusively used in working shaft-like part angle oil line |
| CN209062590U (en) * | 2018-11-09 | 2019-07-05 | 上海高压油泵厂有限公司 | The cylinder body retracting spring inclined hole processing tool of axis type plunger pump |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10128607A (en) * | 1996-10-28 | 1998-05-19 | Ishikawajima Harima Heavy Ind Co Ltd | Multi-shaft drill head |
| US20030123941A1 (en) * | 2001-12-31 | 2003-07-03 | Emerson Eugene E. | Pocket hole drilling and screw installation jig for workpieces |
| CN202763138U (en) * | 2012-08-31 | 2013-03-06 | 重庆水轮机厂有限责任公司 | Electromotor main shaft slant hole drilling jig |
| CN204818965U (en) * | 2015-08-05 | 2015-12-02 | 成都川锚路桥机械有限公司 | A graduation frock for connector circumference rat holing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114894188A (en) * | 2022-07-14 | 2022-08-12 | 中国船舶重工集团公司第七0七研究所 | Table body for hemispherical resonator gyroscope inertial navigation system and processing method thereof |
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Application publication date: 20210319 |