CN107253074B - Lathe fixture for machining eccentric holes of circuit breaker base - Google Patents
Lathe fixture for machining eccentric holes of circuit breaker base Download PDFInfo
- Publication number
- CN107253074B CN107253074B CN201710636688.6A CN201710636688A CN107253074B CN 107253074 B CN107253074 B CN 107253074B CN 201710636688 A CN201710636688 A CN 201710636688A CN 107253074 B CN107253074 B CN 107253074B
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- Prior art keywords
- base
- hole
- circuit breaker
- hexagon
- cover plate
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Classifications
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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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Breakers (AREA)
Abstract
The invention discloses a lathe fixture for processing eccentric holes of a circuit breaker base, which comprises a round base, a cover plate and a balance weight, wherein an interference-preventing center hole is formed in the rotation center of the base; the base is provided with a short pin, and a positioning disc and two balance weights are also arranged on the base through hexagon head bolts; when the workpiece is clamped on the lathe fixture, the workpiece is positioned between the base and the cover plate; after passing through the workpiece and the cover plate, the hexagon head bolt compresses the workpiece on the base through the cooperation of the hexagon nut and the hexagon head bolt. The position aligned by the rotating center of the base is completely consistent with the position of the eccentric hole required to be drilled by the standard breaker base, so that during machining, a worker can meet the part machining requirement by only aligning the drill bit to the rotating center of the base and performing drilling, expanding and boring according to the set rotating speed and the feed amount, the precision and the no deviation can be realized, the mass production can be realized, and the machining difficulty of the eccentric hole of the high-voltage alternating-current sulfur hexafluoride breaker base is thoroughly solved.
Description
Technical Field
The invention belongs to the field of processing clamps of circuit breaker bases, and particularly relates to a lathe clamp for processing eccentric holes of a circuit breaker base.
Background
A standard high voltage ac sulfur hexafluoride circuit breaker base is provided with an eccentric hole of phi 16 deep 46mm radially in its surface, but this still belongs to a processing difficulty of the circuit breaker base at present.
When the common machine tool is used for manual processing, the processing mode of scribing, spot hole drilling and reaming is adopted for the eccentric hole with the depth of phi 16mm, the processing time of the mode is too long, the precision of the eccentric hole with the depth of phi 16mm cannot meet the requirement, and the position of the eccentric hole with the depth of phi 16mm is not easy to accurately control, so that the product quality cannot be reliably ensured, the rejection rate is high, and the production efficiency is low.
When the four-axis machining center is adopted for automatic machining, machining of the ratchet wheel mounting hole with the diameter of 8 multiplied by phi 11mm and the eccentric hole with the depth of phi 16 and the diameter of 46mm is finished by one-time clamping, then clamping is carried out again, and the indexing device is used for milling the U-shaped waist with the width of 17.2 mm. The working procedures of the mode are relatively concentrated, the product quality can be well ensured, the rejection rate is lower, but the product is simpler in structure, the overall requirement on precision is not high, and the U-shaped waist is required to be clamped again when being milled, so that the machine occupation time is long, and the production cost is higher.
Disclosure of Invention
Aiming at the processing difficulty of the high-voltage alternating-current sulfur hexafluoride breaker base, the invention aims to provide a lathe fixture for processing the eccentric hole of the breaker base so as to realize accurate drilling of the eccentric hole.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
a lathe fixture for machining eccentric holes of a circuit breaker base comprises a round base, a cover plate and two balance blocks for eliminating vibration caused by rotation unbalance, wherein an interference-preventing center hole for preventing a cutter from interfering with the base is formed in the rotation center of the base; a long hexagon head bolt hole and a short pin hole are formed in the upper semicircle of the base, the long hexagon head bolt hole and the short pin hole are both positioned on the vertical central line of the base, and the long hexagon head bolt hole is positioned between the interference-preventing central hole and the short pin hole; two short hexagon bolt holes are formed in the lower semicircle of the base, and are respectively positioned at two sides of the vertical center line of the base and are symmetrically distributed;
the short pin hole is internally provided with a short pin for determining the drilling position of the eccentric hole, the long hexagon bolt hole is internally provided with a long hexagon bolt, the long hexagon bolt is sleeved with a positioning disc for positioning the rear part of the circuit breaker base, the positioning disc is fixed on the base through two hexagon screws, and the front end of the long hexagon bolt is provided with threads along the circumferential surface;
the center of the cover plate is provided with a mounting hole through which the front part of the long hexagon head bolt can pass, and the circumferential surface of the front part of the cover plate is provided with a convex ring for positioning the front part of the circuit breaker base;
a short hexagon bolt is arranged in each short hexagon bolt hole, each short hexagon bolt is sequentially sleeved with a balance block, a small gasket and a small hexagon nut, threads are arranged at the front end of each short hexagon bolt along the circumferential surface, and the two small hexagon nuts are respectively used for fixing the two balance blocks on the base through matching with the corresponding threads at the front parts of the short hexagon bolts;
when the breaker base is clamped on the lathe fixture, the breaker base is arranged on the base; the short pin is inserted into one ratchet wheel mounting hole of the circuit breaker base, the long hexagon head bolt passes through the inner hole of the circuit breaker base, and the positioning disc is embedded into the inner hole at the rear part of the circuit breaker base; meanwhile, the cover plate is pressed on the circuit breaker base, the convex ring of the cover plate is attached to the front part of the circuit breaker base, and the rear part of the cover plate is embedded into the inner hole of the front part of the circuit breaker base; the front portion of long hexagon head bolt is followed wear out in the mounting hole of apron to the cover is equipped with big packing ring and big hexagon nut in proper order, the apron pass through big hexagon nut with the cooperation of long hexagon head bolt top screw thread will the circuit breaker base compresses tightly on the base.
Furthermore, the base hole is matched with the short pin hole in a preferential and common mode according to the national standard GB/T1801-2009, and the matching size of the short pin and the short pin hole is phi 11H7/k6.
Furthermore, the positioning disc is matched with the inner ring at the rear part of the circuit breaker base in a size of phi 94.8H7/f6 according to the prior and common matching of the base hole system specified by the national standard GB/T1801-2009.
Furthermore, according to the prior and common matching of the base hole system specified by the national standard GB/T1801-2009, the matching size of the rear part of the cover plate and the inner ring at the front part of the circuit breaker base is phi 100H9/d9.
Further, the diameter of the base is 280mm.
Further, the aperture of the interference-preventing center hole is phi 17.5mm.
The working principle of the invention is as follows:
during clamping, the positioning disc and the balance weight are firstly arranged on the base, then the circuit breaker base to be processed is sleeved on the positioning disc, the positioning disc is embedded into an inner hole at the rear part of the circuit breaker base, the balance weight is positioned below the circuit breaker base, the short pin is inserted into a ratchet wheel mounting hole on the circuit breaker base, the positioning disc and the short pin are utilized to position, the position needing to drill the eccentric hole is aligned with an anti-interference center hole on the base, then the cover plate is covered, and the circuit breaker is clamped through the large gasket and the large hexagonal nut. During processing, the drill bit is aligned to the position of the rotation center of the base, drilling, expanding and boring are carried out according to the set rotating speed and the feed amount, the part processing requirement can be met, the interference-preventing center hole can prevent the cutter from interfering with the base, and the balance weight is used for eliminating vibration caused by rotation unbalance. After the processing is finished, the large hexagon nut is loosened, the cover plate is opened, the workpiece is taken out, and then the next workpiece is put in, so that mass production can be realized.
The beneficial effects of the invention are as follows:
1. according to the invention, the short pin and the positioning disc are used for positioning, and then the cover plate, the large gasket and the large hexagon nut are used for compressing, so that the precision of the part is controlled by the positioning precision of the clamp, the processing quality is ensured, the clamping is convenient, and the production efficiency is greatly improved.
2. After the circuit breaker base to be processed is clamped, the position of the rotation center of the base is completely consistent with the position of the phi 16 deep 46mm eccentric hole required to be drilled by the standard circuit breaker base, so that during processing, the processing of drilling, expanding and boring is carried out only by aiming the drill bit at the rotation center of the base according to the set rotating speed and the feeding amount, the processing requirements of parts can be met, the precision and the zero deviation can be realized, the mass production can be realized, the interference prevention center hole formed in the rotation center of the base can prevent the cutter from interfering with the base, and the vibration caused by rotation imbalance can be well eliminated by two balance weights, so that the processing difficulty of the eccentric hole of the high-voltage alternating current sulfur hexafluoride circuit breaker base is thoroughly solved.
3. The invention disperses the processing procedures, independently processes the phi 16 eccentric holes with the depth of 46mm on the base of the circuit breaker, has little processing content and can reasonably utilize the existing production equipment.
4. The invention has lower technical requirements for workers, can adopt the most reasonable cutting amount, reduces maneuvering time, improves production efficiency and reduces production cost.
5. The invention has the advantages of simple structure, convenient manufacture, 45 steel materials, good cutting performance, low manufacturing cost, convenient operation, safety and reliability.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is an assembly view of the present invention and a circuit breaker base.
Fig. 2 is a front view of the present invention with the cover plate, large washer and large hex nut removed.
Fig. 3 is a cross-sectional view at A-A in fig. 2.
Detailed Description
The invention will be described in detail below with reference to the drawings in combination with embodiments.
Referring to fig. 1-3, a lathe fixture for machining eccentric holes of a circuit breaker base comprises a circular base 1, a cover plate 2 and two balance weights 3 for eliminating vibration caused by rotation unbalance, wherein an interference prevention center hole 4 for preventing a cutter from interfering with the base 1 is formed in the rotation center of the base 1; a long hexagon bolt hole and a short pin hole are formed in the upper semicircle of the base 1, the long hexagon bolt hole and the short pin hole are both positioned on the vertical central line of the base 1, and the long hexagon bolt hole is positioned between the interference-preventing central hole 4 and the short pin hole; two short hexagon bolt holes are formed in the lower semicircle of the base 1, and are respectively positioned at two sides of the vertical center line of the base 1 and are symmetrically distributed;
a short pin 5 for determining the drilling position of the eccentric hole is arranged in the short pin hole, a long hexagon bolt 6 is arranged in the long hexagon bolt hole, a positioning disc 8 for positioning the rear part of the breaker base 7 is sleeved on the long hexagon bolt 6, the positioning disc 8 is fixed on the base 1 through two hexagon screws 9, and threads are arranged at the front end of the long hexagon bolt 6 along the circumferential surface;
a mounting hole 10 which can enable the front part of the long hexagon head bolt 6 to pass through is formed in the circle center of the cover plate 2, and a convex ring for positioning the front part of the breaker base 7 is arranged on the circumferential surface of the front part of the cover plate 2;
a short hexagon bolt 11 is respectively arranged in the two short hexagon bolt holes, each short hexagon bolt 11 is sequentially sleeved with a balance block 3, a small washer 12 and a small hexagon nut 14, threads are arranged at the front end of each short hexagon bolt 11 along the circumferential surface, and the two small hexagon nuts 14 respectively fix the two balance blocks 3 on the base 1 through the threaded fit with the front parts of the corresponding short hexagon bolts 11;
when the breaker base 7 is clamped on the lathe fixture, the breaker base 7 is arranged on the base 1; the short pin 5 is inserted into one ratchet wheel mounting hole of the circuit breaker base 7, the long hexagon head bolt 6 passes through the inner hole of the circuit breaker base 7, and the positioning disc 8 is embedded into the inner hole at the rear part of the circuit breaker base 7; meanwhile, the cover plate 2 is pressed on the circuit breaker base 7, the convex ring of the cover plate 2 is attached to the front part of the circuit breaker base 7, and the rear part of the cover plate 2 is embedded into the inner hole of the front part of the circuit breaker base 7; the front part of the long hexagon head bolt 6 penetrates out of the mounting hole 10 of the cover plate 2 and is sequentially sleeved with a large gasket 15 and a large hexagon nut 16, and the cover plate 2 tightly presses the circuit breaker base 7 on the base 1 through the cooperation of the large hexagon nut 16 and the top threads of the long hexagon head bolt 6.
Furthermore, the base hole is matched with the short pin 5 in a preferential and common mode according to the national standard GB/T1801-2009, and the matched size of the short pin hole and the short pin 5 is phi 11H7/k6.
Further, according to the prior and common matching of the base hole system specified by the national standard GB/T1801-2009, the matching size of the positioning disc 8 and the inner ring at the rear part of the circuit breaker base 7 is phi 94.8H7/f6.
Furthermore, the base hole is matched preferentially and commonly according to the national standard GB/T1801-2009, and the matched size of the rear part of the cover plate 2 and the inner ring of the front part of the circuit breaker base 7 is phi 100H9/d9.
Further, the diameter of the base 1 is 280mm.
Further, the aperture of the interference-preventing center hole 4 is phi 17.5mm.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A lathe fixture for machining eccentric holes of a circuit breaker base is characterized in that: the rotary type cutter comprises a round base (1), a cover plate (2) and two balance weights (3) for eliminating vibration caused by rotary unbalance, wherein an interference prevention center hole (4) for preventing a cutter from interfering with the base (1) is formed in the rotary center of the base (1); a long hexagon head bolt hole and a short pin hole are formed in the upper semicircle of the base (1), the long hexagon head bolt hole and the short pin hole are both positioned on the vertical central line of the base (1), and the long hexagon head bolt hole is positioned between the interference-preventing central hole (4) and the short pin hole; two short hexagon bolt holes are formed in the lower semicircle of the base (1), and the two short hexagon bolt holes are respectively located at two sides of the vertical center line of the base (1) and are symmetrically distributed;
a short pin (5) for determining the drilling position of an eccentric hole is arranged in the short pin hole, the matching size of the short pin (5) and the short pin hole is phi 11H7/k6, a long hexagon head bolt (6) is arranged in the long hexagon head bolt hole, a positioning disc (8) for positioning the rear part of a circuit breaker base (7) is sleeved on the long hexagon head bolt (6), the positioning disc (8) is fixed on the base (1) through two hexagon screws (9), and threads are arranged at the front end of the long hexagon head bolt (6) along the circumferential surface;
a mounting hole (10) which can enable the front part of the long hexagon head bolt (6) to pass through is formed in the circle center of the cover plate (2), and a convex ring for positioning the front part of the circuit breaker base (7) is arranged on the circumferential surface of the front part of the cover plate (2);
a short hexagon bolt (11) is arranged in each of the two short hexagon bolt holes, each short hexagon bolt (11) is sequentially sleeved with a balance block (3), a small gasket (12) and a small hexagon nut (14), threads are arranged at the front end of each short hexagon bolt (11) along the circumferential surface, and the two small hexagon nuts (14) fix the two balance blocks (3) on the base (1) through the threaded fit with the front parts of the corresponding short hexagon bolts (11);
when the breaker base (7) is clamped on the lathe fixture, the breaker base (7) is arranged on the base (1); the short pin (5) is inserted into one ratchet wheel mounting hole of the circuit breaker base (7), the long hexagon head bolt (6) passes through an inner hole of the circuit breaker base (7), the positioning disc (8) is embedded into the inner hole at the rear part of the circuit breaker base (7), and the matching size of the positioning disc (8) and the inner ring at the rear part of the circuit breaker base (7) is phi 94.8H7/f6; meanwhile, the cover plate (2) is pressed on the circuit breaker base (7), the convex ring of the cover plate (2) is attached to the front part of the circuit breaker base (7), the rear part of the cover plate (2) is embedded into an inner hole at the front part of the circuit breaker base (7), and the matching size of the rear part of the cover plate (2) and the inner ring at the front part of the circuit breaker base (7) is phi 100H9/d9; the front part of the long hexagon head bolt (6) penetrates out of the mounting hole (10) of the cover plate (2), a large gasket (15) and a large hexagon nut (16) are sequentially sleeved on the front part of the long hexagon head bolt, and the cover plate (2) tightly presses the circuit breaker base (7) on the base (1) through the cooperation of the large hexagon nut (16) and the top threads of the long hexagon head bolt (6).
2. The lathe fixture for machining eccentric holes of circuit breaker bases according to claim 1, characterized in that: the diameter of the base (1) is 280mm.
3. The lathe fixture for machining eccentric holes of circuit breaker bases according to claim 1, characterized in that: the aperture of the interference-preventing center hole (4) is phi 17.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710636688.6A CN107253074B (en) | 2017-07-31 | 2017-07-31 | Lathe fixture for machining eccentric holes of circuit breaker base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710636688.6A CN107253074B (en) | 2017-07-31 | 2017-07-31 | Lathe fixture for machining eccentric holes of circuit breaker base |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107253074A CN107253074A (en) | 2017-10-17 |
| CN107253074B true CN107253074B (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710636688.6A Active CN107253074B (en) | 2017-07-31 | 2017-07-31 | Lathe fixture for machining eccentric holes of circuit breaker base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107253074B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115319511B (en) * | 2022-04-22 | 2023-12-08 | 成都飞机工业（集团）有限责任公司 | Turning device and turning method for eccentric part |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202388274U (en) * | 2011-12-09 | 2012-08-22 | 浙江科力车辆控制系统有限公司 | Rotation station turning tool for four-circuit protection valve |
| CN102490044B (en) * | 2011-12-21 | 2015-07-29 | 北京中清能发动机技术有限公司 | A kind of technological equipment processing smooth block |
| CN203076963U (en) * | 2012-12-10 | 2013-07-24 | 常州金瑞达科技有限公司 | Pickaxe arm taper hole turning clamp |
| CN204639691U (en) * | 2015-05-06 | 2015-09-16 | 浙江森强机电制造有限公司 | A kind of boring eccentric orfice fixture |
| CN205147901U (en) * | 2015-11-09 | 2016-04-13 | 中船钢构工程股份有限公司 | Roll adjustment oar base turning off -centre anchor clamps for boss |
| CN207447908U (en) * | 2017-07-31 | 2018-06-05 | 苏州工业职业技术学院 | A kind of turning attachment for processing circuit breaker base eccentric orfice |
-
2017
- 2017-07-31 CN CN201710636688.6A patent/CN107253074B/en active Active
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| Publication number | Publication date |
|---|---|
| CN107253074A (en) | 2017-10-17 |
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