CN111745171B - Clamping protection device for shaping explosive columns - Google Patents
Clamping protection device for shaping explosive columns Download PDFInfo
- Publication number
- CN111745171B CN111745171B CN202010544557.7A CN202010544557A CN111745171B CN 111745171 B CN111745171 B CN 111745171B CN 202010544557 A CN202010544557 A CN 202010544557A CN 111745171 B CN111745171 B CN 111745171B
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- sealing
- chuck
- clamping
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- jaw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
Abstract
The invention relates to a clamping protection device for shaping a grain. When the three-jaw chuck clamps the explosive column for processing, a clamping jaw end sealing protection device is arranged on the clamping jaw side of the chuck and is used for preventing explosive scraps and dust generated in the process of processing the explosive column from entering the three-jaw chuck from the clamping jaw end of the chuck; a central isolation cylinder is arranged on the cylinder section of the inner cavity of the chuck and used for isolating the explosive column from the three-jaw chuck and preventing processing chips and dust of the explosive column from entering gaps of parts inside the three-jaw chuck; a flange end sealing and protecting device is arranged on the flange side of a chuck and used for preventing medicine scraps and dust generated in the processing process of a medicine column from entering the three-jaw chuck from the flange end of the three-jaw chuck. In the shaping and processing process of the coated grain of the solid rocket engine, the clamping protective device does not generate additional disturbance force to the grain, does not change the original posture of the grain, prevents processing chips of the grain from entering the chuck, thereby effectively preventing the inside of the chuck from being corroded and improving the cleanliness and the safety in processing the grain.
Description
Technical Field
The invention relates to a chuck device, in particular to a clamping protection device for shaping a grain. The invention is used in the field of manufacturing of coated grain of solid rocket engines.
Background
The shaping of the explosive column needs to clamp the explosive column and then carry out turning processing, and a large amount of explosive scraps with strong corrosivity and inflammability can be generated during processing. Traditional three-jaw chuck is carrying out turning process tightly the explosive column, does not have safeguard measure between chuck and the explosive column, and the medicine bits that produce during the explosive column turning can direct contact three-jaw chuck, can creep into inside the chuck even, influences mechanical device operational safety and mechanical life. In order to enable the explosive column to be completely isolated outside the chuck in the machining process, a brand-new explosive column clamping protection device is needed.
Disclosure of Invention
The technical problem solved by the invention is as follows: overcome prior art's not enough, provide a clamping protector for powder column plastic, the device adds man-hour in carrying out cladding powder column plastic, and this protector can keep apart powder column and chuck completely, prevents inside the medicine bits gets into the chuck, effectively prevents the inside corruption of chuck, improves cleanliness and security that the powder column adds man-hour.
The technical scheme of the invention is as follows: a clamping protection device for shaping a grain comprises a three-jaw chuck, a clamping jaw end sealing protection device, a central isolation cylinder and a flange end sealing protection device; wherein:
the three-jaw chuck comprises a flange, a chuck seat and three clamping jaws; the chuck seat comprises a static ring and a moving ring, the static ring is sleeved on the periphery of the moving ring along the middle part of the moving ring, the moving ring can rotate relative to the static ring, the moving ring is provided with a central through hole and three clamping groove structures communicated with the central through hole, and every two three clamping grooves are 120 degrees and uniformly distributed in the radial direction of the three-jaw chuck; the clamping jaws are arranged at one end of the chuck base moving coil and are marked as clamping jaw ends, the three clamping jaws correspond to the three clamping grooves one by one and are arranged in the clamping grooves, the three clamping jaws are close to the central through hole along the clamping grooves simultaneously and are used for clamping the explosive columns, and the three clamping jaws are far away from the central through hole along the clamping grooves simultaneously and are used for loosening the explosive columns; mounting a flange at the other end of the chuck base moving coil, and marking as a flange end;
the clamping jaw end sealing protection device is used for preventing medicine chips and dust generated in the processing process of the medicine column from entering the three-jaw chuck from the clamping jaw end of the chuck;
the flange end sealing protection device is used for preventing medicine chips and dust generated in the processing process of the medicine column from entering the three-jaw chuck from the flange end of the three-jaw chuck;
the central isolation cylinder is arranged on the side wall of the central through hole of the chuck base moving coil and the end face of the clamping jaw end and used for isolating the explosive column from the three-jaw chuck and preventing processing chips and dust of the explosive column from entering gaps of internal parts of the three-jaw chuck.
The central isolation cylinder comprises a hollow cylinder structure and end faces which are perpendicular to the axial direction of the cylinder structure and fixedly connected to the end portions of the cylinder, openings are arranged on the end faces at intervals of 120 degrees in pairs, and the shape and the contour of the openings are the same as those of the clamping jaws.
The clamping jaw end sealing and protecting device comprises a clamping jaw sealing block, a sealing pressing block, a moving coil sealing gasket, a front face moving sealing cover and a sealing ring;
one side of the clamping jaw sealing block is superposed and fastened with the side edges of two sides of the opening on the end surface of the central isolation cylinder, and the other side of the clamping jaw sealing block is tightly attached to the side edges of the clamping jaws; the end face of the central isolation cylinder, the clamping jaw sealing block and the clamping jaws form a sealed annular end face; the sealing pressing block consists of an annular structure and three sections of circular-arc step structures, the circular-arc step structures are uniformly distributed on the circular-arc structure and are integrally formed with the circular-arc structure, the bottom steps of the circular-arc step structures are narrow, the width of the circular-arc step structures is consistent with the width of a circular ring and overlapped with the circular ring, the top steps of the circular-arc step structures are wide and extend towards the center of the circular-arc structure, three gaps are formed in the circular ring, and the positions and the shapes of the gaps are consistent with those of external openings formed by a group of clamping jaw sealing blocks; the top step of the sealing pressing block is pressed below the outer edge of the end face of the central isolation cylinder and is fixedly connected with the end face of the central isolation cylinder through a screw; the front movable sealing cover is an annular stepped cover and comprises two-stage stepped surfaces, and a certain gap is formed between the second-stage stepped surface of the front movable sealing cover and the static ring of the chuck seat; the inner diameter of the movable coil sealing gasket is the same as the outer diameter of the chuck movable coil, the movable coil sealing gasket is attached to the end face of the chuck base movable coil and is arranged between the sealing pressing block and the top of the first-stage step face of the front movable sealing cover along the direction of the rotating shaft; the side of the front movable sealing cover facing the step surface of the chuck seat is provided with an annular square groove, and the sealing ring is arranged in the annular square groove.
The moving coil sealing gasket is made of rubber materials.
The flange end sealing protection device comprises a fixed flange, a sealing gland and a sealing ring;
the sealing gland is of an L-shaped annular structure and consists of a longitudinal ring coaxial with the central isolation cylinder and a transverse ring vertical to the longitudinal ring, and the inner side of the longitudinal ring is installed in a manner of clinging to the outer surface of the central isolation cylinder;
the fixed flange is a stepped ring and comprises a first step end face and a second step end face; the first step end face and the second step end face are connected through a longitudinal cylinder section, the first step end face is installed on the end face of the chuck flange through a screw, and the inner hole face of the second step end face of the fixed flange is fixedly installed on the outer side of the longitudinal ring of the sealing gland;
the horizontal annular end face outer lane of gland open-loop shape square groove, the sealing ring is installed in the annular square groove of gland, and the outer periphery of sealing ring and the vertical section of thick bamboo section hole face butt of mounting flange.
The sealing ring is made of rubber materials;
the central isolation cylinder, the clamping jaw sealing block, the sealing pressing block, the moving coil sealing gasket and the front face moving sealing cover are made of 316L stainless steel materials.
The fixed flange and the sealing gland are made of 316L stainless steel materials.
Compared with the prior art, the invention has the beneficial effects that:
(1) the structure of two ends of the traditional chuck is optimized, and the protective devices are respectively arranged at the clamping jaw end and the flange end of the chuck, so that the processing chips of the explosive column are prevented from entering the inner cavity of the chuck from the end surface of the chuck;
(2) according to the invention, the central isolation cylinder is arranged on the cylindrical section of the inner cavity of the chuck to isolate the explosive column from the chuck, so that the processing chips of the explosive column are effectively prevented from entering the gap of the internal part of the chuck body;
(3) the invention can effectively prevent the corrosion in the chuck and improve the cleanliness and safety during processing the explosive column.
Drawings
FIG. 1 is a view showing an overall structure of a clamping protection device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a clamping guard according to an embodiment of the present invention;
wherein: 1 is a grain, 2 is a claw, 3 is a central isolation cylinder, 4 is a claw sealing block, 5 is a sealing pressing block, 6 is a moving coil sealing gasket, 7 is a front moving sealing cover, 8 is a sealing ring, 9 is a fixed flange, 10 is a sealing gland, 11 is a sealing ring, and 12 is a chuck fixing piece;
FIG. 3 is a cross-sectional view of a clamping grain of the clamping guard of the embodiment of the present invention;
FIG. 4 is a schematic structural view of a centrifugal separator according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a sealing press block according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples.
The invention comprises a three-jaw chuck, a clamping jaw end sealing protection device, a central isolation cylinder and a flange end sealing protection device, wherein the clamping jaw end sealing protection device comprises a clamping jaw sealing block, a sealing pressing block, a moving coil sealing gasket, a front moving sealing cover and a sealing ring; the central isolation cylinder is arranged in the chuck and used for isolating the explosive column from the three-jaw chuck; the flange end sealing and protecting device comprises a flange end fixing flange, a flange end sealing pressing block and a flange end sealing ring.
As shown in fig. 1 and 3, the invention provides a clamping protection device for shaping a grain, which comprises a three-jaw chuck, a clamping jaw end sealing protection device, a central isolation cylinder 3 and a flange end sealing protection device; wherein:
the three-jaw chuck comprises a flange, a chuck seat and three clamping jaws 2; the chuck seat comprises a static ring and a moving ring, the static ring is sleeved on the periphery of the moving ring along the middle part of the moving ring, the moving ring can rotate relative to the static ring, the moving ring is provided with a central through hole and three clamping groove structures communicated with the central through hole, and every two three clamping grooves are 120 degrees and uniformly distributed in the radial direction of the three-jaw chuck; one end of the chuck base moving coil is provided with clamping jaws 2 which are marked as clamping jaw ends, the three clamping jaws 2 correspond to the three clamping grooves one by one and are arranged in the clamping grooves, the three clamping jaws 2 are simultaneously close to the central through hole along the clamping grooves and are used for clamping the explosive column, and the three clamping jaws are simultaneously far away from the central through hole along the clamping grooves and are used for loosening the explosive column 1; mounting a flange at the other end of the chuck base moving coil, and marking as a flange end; the flanged ends are fixedly connected by a chuck fixing member 12.
The clamping jaw end sealing protection device is used for preventing medicine chips and dust generated in the processing process of the medicine column from entering the three-jaw chuck from the clamping jaw end of the chuck;
the flange end sealing protection device is used for preventing medicine chips and dust generated in the processing process of the medicine column from entering the three-jaw chuck from the flange end of the three-jaw chuck;
the central isolation cylinder is arranged on the side wall of the central through hole of the chuck base moving coil and the end face of the clamping jaw end and used for isolating the explosive column from the three-jaw chuck and preventing processing chips and dust of the explosive column from entering gaps of internal parts of the three-jaw chuck.
As shown in fig. 4, the central isolation cylinder comprises a hollow cylinder structure and end faces perpendicular to the axial direction of the cylinder structure and fixedly connected to the ends of the cylinder, wherein openings are arranged on the end faces at intervals of 120 degrees in pairs, and the shape and the outline of the openings are the same as those of the clamping jaws.
The clamping jaw end sealing and protecting device comprises 6 clamping jaw sealing blocks 4, a sealing pressing block 5, a moving coil sealing gasket 6, a front face moving sealing cover 7 and a sealing ring 8;
as shown in fig. 2 and 5, the jaw sealing blocks have six blocks, which are divided into three groups, each group of jaw sealing blocks is arranged on the end surfaces of the chuck moving coils at two sides of the jaw, one side of each jaw sealing block 4 is coincided and fastened with the side edges at two sides of the opening on the end surface of the central isolation cylinder, and the other side is tightly attached to the side edge of the jaw 2; the end face of the central isolation cylinder, the clamping jaw sealing block 4 and the clamping jaws form a sealed annular end face; the sealing pressing block 5 consists of an annular structure and three sections of circular-arc step structures, the circular-arc step structures are uniformly distributed on the circular-arc structure and are integrally formed with the circular-arc structure, the bottom steps of the circular-arc step structures are narrow, the width of the circular-arc step structures is consistent with the width of the circular ring and are overlapped with the circular ring, the top steps of the circular-arc step structures are wide and extend towards the center of the circular-arc structure, three gaps are formed in the circular ring, and the positions and the shapes of the gaps are consistent with the shape of an external opening formed by a group of clamping jaw sealing blocks; the top step of the sealing pressing block 5 is pressed below the outer edge of the end face of the central isolation cylinder and is fixedly connected with the end face of the central isolation cylinder through a screw; namely: the sealing pressing block is fixed on the end face of the chuck moving coil; the front movable sealing cover 7 is an annular stepped cover and comprises two steps, and a certain gap is formed between the second step of the front movable sealing cover 7 and the static ring of the chuck seat; the movable ring sealing gasket 6 is attached to the end face of the movable ring of the chuck seat and is arranged between the sealing pressing block 5 and the top of the first-stage step face of the front movable sealing cover 7 along the direction of the rotating shaft; the side of the front movable sealing cover 7 facing the step surface of the chuck seat is provided with an annular square groove, and the sealing ring 8 is arranged in the annular square groove.
Preferably, the moving coil seal 6 is made of a rubber material.
Preferably, the flange end sealing and protecting device comprises a fixed flange 9, a sealing gland 10 and a sealing ring 11;
preferably, the sealing gland 10 is an L-shaped annular structure, and consists of a longitudinal ring coaxial with the central isolation cylinder and a transverse ring vertical to the longitudinal ring, and the inner side of the longitudinal ring is tightly attached to the outer surface of the central isolation cylinder;
preferably, the fixing flange 9 is a stepped ring, and includes a first stepped end surface and a second stepped end surface; the first step end face and the second step end face are connected through a longitudinal cylinder section, the first step end face is installed on the end face of the chuck flange through a screw, and the inner hole face of the second step end face of the fixed flange 9 is fixedly installed with the outer side of a longitudinal ring of the sealing gland 10;
preferably, the horizontal annular end face outer lane open loop shape square groove of gland 10, sealing ring 11 is installed in the annular square groove of gland, and the sealing ring outer periphery and the vertical section of thick bamboo section hole face butt of mounting flange.
Preferably, the sealing ring 11 is made of rubber material;
preferably, the central isolation cylinder 3, the clamping jaw sealing block 4, the sealing pressing block 5, the moving coil sealing gasket 6 and the front face moving sealing cover 7 are made of 316L stainless steel materials.
The fixed flange 9 and the sealing gland 10 are made of 316L stainless steel materials.
The working principle of the invention is as follows:
the clamping protection device is arranged on a powder column shaping processing table, the clamping jaws clamp the powder column, the central isolation cylinder always presses the sealing pressing block in the process of shaping and processing the powder column, no gap is generated between the central isolation cylinder and the sealing pressing block at the moment, and powder column processing scraps cannot enter the chuck; a movable ring sealing gasket is clamped between the sealing pressing block and the front movable sealing cover, so that a gap is eliminated; the sealing ring is arranged in an annular square groove in the front movable sealing cover and is abutted against the outer end face of the chuck, so that a gap is eliminated; a flange end fixing flange is fixed on the chuck fixing piece, and a sealing gland is arranged in the fixing flange; and a sealing ring is arranged in the sealing gland and is abutted against the inner surface of the fixed flange, so that a gap is completely eliminated. So far, in the powder column course of working, do not have any gap to exist between powder column and the chuck, so inside the powder column processing piece can not enter into the chuck completely, effectively guarantee processing security extension chuck life simultaneously.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (8)
1. The utility model provides a clamping protector for powder column plastic which characterized in that: the device comprises a three-jaw chuck, a clamping jaw end sealing protection device, a central isolation cylinder and a flange end sealing protection device; wherein:
the three-jaw chuck comprises a flange, a chuck seat and three clamping jaws; the chuck seat comprises a static ring and a moving ring, the static ring is sleeved on the periphery of the moving ring along the middle part of the moving ring, the moving ring can rotate relative to the static ring, the moving ring is provided with a central through hole and three clamping groove structures communicated with the central through hole, and every two three clamping grooves are 120 degrees and uniformly distributed in the radial direction of the three-jaw chuck; the clamping jaws are arranged at one end of the chuck base moving coil and are marked as clamping jaw ends, the three clamping jaws correspond to the three clamping grooves one by one and are arranged in the clamping grooves, the three clamping jaws are close to the central through hole along the clamping grooves simultaneously and are used for clamping the explosive columns, and the three clamping jaws are far away from the central through hole along the clamping grooves simultaneously and are used for loosening the explosive columns; mounting a flange at the other end of the chuck base moving coil, and marking as a flange end;
the clamping jaw end sealing protection device is used for preventing medicine chips and dust generated in the processing process of the medicine column from entering the three-jaw chuck from the clamping jaw end of the chuck;
the flange end sealing protection device is used for preventing medicine chips and dust generated in the processing process of the medicine column from entering the three-jaw chuck from the flange end of the three-jaw chuck;
the central isolation cylinder is arranged on the side wall of the central through hole of the chuck base moving coil and the end face of the clamping jaw end and used for isolating the explosive column from the three-jaw chuck and preventing processing chips and dust of the explosive column from entering gaps of internal parts of the three-jaw chuck.
2. The clamping protector for shaping the explosive column according to claim 1, wherein the central isolation cylinder comprises a hollow cylinder structure and end faces which are perpendicular to the axial direction of the cylinder structure and fixedly connected to the ends of the cylinder, and the end faces are provided with openings at intervals of 120 degrees in pairs, and the openings have the same outline as the clamping jaws.
3. The clamping protection device for shaping the explosive column according to claim 1, wherein the clamping jaw end sealing protection device comprises 6 clamping jaw sealing blocks (4), a sealing pressing block (5), a moving coil sealing gasket (6), a front moving sealing cover (7) and a sealing ring (8);
one side of the clamping jaw sealing block (4) is coincided and fastened with the side edges of the two sides of the opening on the end surface of the central isolation cylinder, and the other side of the clamping jaw sealing block is tightly attached to the side edge of the clamping jaw (2); the end face of the central isolation cylinder, the clamping jaw sealing block (4) and the clamping jaws form a sealed annular end face; the sealing pressing block (5) consists of an annular structure and three sections of circular-arc step structures, the circular-arc step structures are uniformly distributed on the circular-arc structure and are integrally formed with the circular-arc structure, the bottom steps of the circular-arc step structures are narrow, the width of the circular-arc step structures is consistent with the width of the circular ring and are overlapped with the circular ring, the top steps of the circular-arc step structures are wide and extend towards the center of the circular-arc structure, three gaps are formed in the circular ring, and the positions and the shapes of the gaps are consistent with those of external openings formed by a group of clamping jaw sealing blocks; the top step of the sealing pressing block (5) is pressed below the outer edge of the end face of the central isolation cylinder and is fixedly connected with the end face of the central isolation cylinder through a screw; the front movable sealing cover (7) is an annular stepped cover and comprises two steps, and a certain gap is formed between the second step of the front movable sealing cover (7) and the static ring of the chuck seat; the inner diameter of the movable coil sealing gasket (6) is the same as the outer diameter of the chuck movable coil, the movable coil sealing gasket is attached to the end face of the chuck base movable coil and is arranged between the sealing pressing block (5) and the top of the first-stage step face of the front movable sealing cover (7) along the direction of the rotating shaft; an annular square groove is formed in the side, facing the step surface of the chuck seat, of the front movable sealing cover (7), and the sealing ring (8) is installed inside the annular square groove.
4. A clamping protector for drug column shaping as claimed in claim 3 characterised in that the moving coil seal (6) is made of rubber material.
5. The clamping protection device for shaping the explosive column according to claim 1, wherein the flange end sealing protection device comprises a fixed flange (9), a sealing gland (10) and a sealing ring (11);
the sealing gland (10) is of an L-shaped annular structure and consists of a longitudinal ring coaxial with the central isolation cylinder and a transverse ring vertical to the longitudinal ring, and the inner side of the longitudinal ring is tightly attached to the outer surface of the central isolation cylinder;
the fixed flange (9) is a stepped ring and comprises a first step end face and a second step end face; the first step end face and the second step end face are connected through a longitudinal cylinder section, the first step end face is installed on the end face of the chuck flange through a screw, and the inner hole face of the second step end face of the fixed flange (9) is fixedly installed with the outer side of a longitudinal ring of the sealing gland (10);
the sealing device is characterized in that the sealing gland (10) is provided with an outer ring of a transverse annular end face and an outer ring of an open annular square groove, the sealing ring (11) is arranged in the square groove of the sealing gland, and the outer circumferential surface of the sealing ring is abutted to the inner hole surface of the vertical cylinder section of the fixed flange.
6. The clamping protector for shaping grains according to claim 5, characterized in that the sealing ring (11) is made of rubber material.
7. The clamping protection device for shaping the explosive column according to claim 3, wherein the central isolation cylinder (3), the clamping jaw sealing block (4), the sealing pressing block (5), the moving coil sealing gasket (6) and the front face moving sealing cover (7) are made of 316L stainless steel materials.
8. The clamping protection device for shaping the explosive column according to claim 3, wherein the fixing flange (9) and the sealing gland (10) are made of 316L stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010544557.7A CN111745171B (en) | 2020-06-15 | 2020-06-15 | Clamping protection device for shaping explosive columns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010544557.7A CN111745171B (en) | 2020-06-15 | 2020-06-15 | Clamping protection device for shaping explosive columns |
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| Publication Number | Publication Date |
|---|---|
| CN111745171A CN111745171A (en) | 2020-10-09 |
| CN111745171B true CN111745171B (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010544557.7A Active CN111745171B (en) | 2020-06-15 | 2020-06-15 | Clamping protection device for shaping explosive columns |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595219B (en) * | 2020-10-30 | 2022-12-27 | 上海航天化工应用研究所 | Horizontal shaping and detecting device for energy-containing coated explosive column |
| CN114619062A (en) * | 2022-03-12 | 2022-06-14 | 济南中正金码科技有限公司 | Large-stroke chuck protection structure for desk type equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1348507A1 (en) * | 2002-03-28 | 2003-10-01 | Schunk GmbH & Co. KG Fabrik für Spann- und Greifwerkzeuge | Chuck |
| CN109789492A (en) * | 2016-11-17 | 2019-05-21 | 株式会社北川铁工所 | Chuck |
| CN110666198A (en) * | 2019-10-24 | 2020-01-10 | 河南能源化工集团重型装备有限公司 | Portable center hole drilling device |
| CN210702635U (en) * | 2019-09-23 | 2020-06-09 | 航大精密机械(大连)有限公司 | Chuck for machine tool |
-
2020
- 2020-06-15 CN CN202010544557.7A patent/CN111745171B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1348507A1 (en) * | 2002-03-28 | 2003-10-01 | Schunk GmbH & Co. KG Fabrik für Spann- und Greifwerkzeuge | Chuck |
| CN109789492A (en) * | 2016-11-17 | 2019-05-21 | 株式会社北川铁工所 | Chuck |
| CN210702635U (en) * | 2019-09-23 | 2020-06-09 | 航大精密机械(大连)有限公司 | Chuck for machine tool |
| CN110666198A (en) * | 2019-10-24 | 2020-01-10 | 河南能源化工集团重型装备有限公司 | Portable center hole drilling device |
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| CN111745171A (en) | 2020-10-09 |
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