CN103143753A - Disc-type underreamer - Google Patents
Disc-type underreamer Download PDFInfo
- Publication number
- CN103143753A CN103143753A CN2013100958228A CN201310095822A CN103143753A CN 103143753 A CN103143753 A CN 103143753A CN 2013100958228 A CN2013100958228 A CN 2013100958228A CN 201310095822 A CN201310095822 A CN 201310095822A CN 103143753 A CN103143753 A CN 103143753A
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- CN
- China
- Prior art keywords
- cutterhead
- holder head
- bayonet lock
- tool holder
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
- B23B51/05—Drills for trepanning for cutting discs from sheet
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
The invention discloses a disc-type underreamer, which comprises a main shaft connected to a motor output shaft, wherein one end of the main shaft is connected with an aperture regulation disc with a round hole; the aperture regulation disc is rotatably sheathed in a cutterhead arranged on the front end of the aperture regulation disc; the rear side of the cutterhead is provided with an embedding groove in nested cooperation with the aperture regulation disc; the radial direction of the front side of the cutterhead is provided with at least one pair of blade assemblies symmetrically arranged relative to the center of the cutterhead; each blade assembly comprises a blade, a cutter holder head and a cutter holder driving block fixedly arranged on the cutter holder head; the blade is vertically and fixedly arranged on the cutter holder head; two sides of a junction of the cutter holder head and the cutter holder driving block are formed into an ''I''-shaped groove; the radial direction of the corresponding cutterhead is provided with an inverse ''T''-shaped groove; the ''I''-shaped groove on the junction of the cutter holder head and the cutter holder driving block is sheathed in the inverse ''T''-shaped groove of the cutterhead and can slide along the radial direction; the inner side of the aperture regulation disc is provided with an involute-shaped spiral groove distributed on the whole disc surface; and the bottom side of the corresponding cutter holder driving block is provided with a plurality of tooth blocks cooperated with the spiral groove.
Description
[technical field]
The present invention relates to tapping equipment, relate in particular to the disc type reamer.
[background technology]
At present, when the sheet materials boring such as processing existing plank, plastic plate, metallic plate or perforate, general electric drill or the hand drill of adopting operates, for the different pore size machining hole, often need to change the drill bit of different-diameter or the hole that Counterboring apparatus is offered the different-diameter size, adding needs frequently more bit change or Counterboring apparatus man-hour, complicated operation, the corresponding drill bit or the Counterboring apparatus that usually need to lay in a plurality of different-diameters have increased the instrument cost in boring or reaming process, have reduced operating efficiency.
[summary of the invention]
The invention provides a kind of simple to operately, save the instrument cost, be convenient to process the disc type reamer of different pore size.
In order to realize the foregoing invention purpose, the technical solution used in the present invention is:
The disc type reamer comprises the main shaft that is connected on motor output shaft; Described main shaft one end is connected with the aperture adjustment dish of a circle, and the aperture adjustment disc spins is set in the cutterhead that its front end arranges, and the rear side of cutterhead is provided with and the nested embeded slot that coordinates of aperture adjustment dish; The footpath of the positive front side of described cutterhead upwards is provided with at least one pair of blade assembly that arranges with respect to the cutterhead Central Symmetry, described blade assembly comprises blade, tool holder head and the tool rest drive block that is fixed on tool holder head forms, blade vertically is fixed on tool holder head, the both sides of described tool holder head and tool rest drive block junction form " work " word groove, corresponding cutterhead radially is provided with inverted T-shape slot, and " work " word groove of tool holder head and tool rest drive block junction is set in the inverted T-shape slot of cutterhead and also can radially slides; Described aperture adjustment dish inboard is provided with the involute shape helicla flute of arranging whole card, and corresponding tool rest drive block bottom side is provided with a plurality of tooth pieces that coordinate with helicla flute; Rotate the aperture adjustment plate and drive symmetrically arranged all tool rest drive blocks and tool holder head along the T-shape slot of cutterhead in opposite directions or opposing movement, adjust the size in the tool holder head that is arranged in pairs in the cutter diameter direction and cutter preprocessing aperture thereof.
Further, described cutterhead front also is provided with the graduation mark of determining cutterhead cutter preprocessing aperture size.
Further, described tool rest drive block is " protruding " word shape, tool holder head is provided with the groove that coordinates with the plush copper of tool rest drive block, is fixed and will be locked on cutterhead along the tool holder head of sliding on cutterhead by dog screw in the groove of the plush copper insertion tool holder head of tool rest drive block.
Further, be provided with the arcuate socket that a plurality of and inboard helicla flute connects outside described aperture adjustment dish.
Further, on described main shaft, dust cover is installed also.
Further, described dust cover rear side also is provided with locks the retaining pin module that the aperture adjustment plate rotatablely moves with respect to cutterhead, described retaining pin module comprises nominal screw in bayonet lock exterior nut cap, bayonet lock spring, bayonet lock and bayonet lock, dust cover is provided with the pin hole that coordinates with bayonet lock, after the bayonet lock spring housing is connected to bayonet lock and is installed on the pin hole of dust cover, bayonet lock one end is fixed in by the bayonet lock exterior nut cap in the outside, and the bayonet lock other end is installed in bayonet lock after nominal screw with arcuate socket on described aperture adjustment dish and matched.
Further, described cutterhead front center also is equipped with the centre drill of being convenient to treat perforate centering.
Further, described main shaft rear side also is equipped with the blade pretension be convenient on cutterhead in the main spring of to be processed.
Further, the both sides, front and back of described tool rest are respectively equipped with the blade holddown groove, and described blade is fixed in the blade holddown groove of tool rest front side or rear side by screw.
Further, also be provided with on described cutterhead and prevent that tool holder head from skidding off the tool rest limiting card of T-shape slot.
The invention has the beneficial effects as follows:
tool holder head of the present invention and both sides, tool rest drive block junction form " work " word groove and are set in the inverted T-shape slot of cutterhead and can radially slide, be provided with the involute shape helicla flute of arranging whole card in aperture adjustment dish inboard, corresponding tool rest drive block bottom side is provided with a plurality of tooth pieces that coordinate with helicla flute, rotate the aperture adjustment plate and drive symmetrically arranged all tool holder head along the T-shape slot of cutterhead in opposite directions or opposing movement, adjustment is arranged in pairs in the tool holder head of cutter diameter direction and the size in cutter preprocessing aperture thereof, then will be locked on cutterhead along the tool holder head of sliding on cutterhead by dog screw, add man-hour, only need to adjust by the graduation mark on cutterhead a plurality of blade assemblies of being furnished with on it, can reach the size in automatic adjustment preprocessing aperture, need frequent drill bit or the Counterboring apparatus of changing different-diameter when not needing picture to process different apertures in the past, simple to operate, greatly reduce the instrument cost of equipment, improved working (machining) efficiency.
[description of drawings]
Fig. 1 is blast structural representation of the present invention;
Fig. 2 is the main TV structure enlarged diagram of aperture adjustment dish of the present invention;
Fig. 3 is the side sectional structure enlarged diagram of Fig. 2;
Fig. 4 is the rear TV structure enlarged diagram of aperture adjustment dish of the present invention;
Fig. 5 is the structure enlarged diagram that explodes of facing of cutterhead of the present invention and blade assembly;
Fig. 6 is the main TV structure enlarged diagram of cutterhead of the present invention.
Fig. 7 is the side sectional structure enlarged diagram of Fig. 6;
Fig. 8 is that the master of blade assembly of the present invention looks three-dimensional blast structure enlarged diagram;
Fig. 9 is the side perspective blast structure enlarged diagram of blade assembly of the present invention;
Figure 10 is the stereochemical structure enlarged diagram of blade assembly of the present invention;
Figure 11 is the main TV structure enlarged diagram of blade of the present invention;
Figure 12 is the stereochemical structure enlarged diagram of tool holder head of the present invention;
Figure 13 is the stereochemical structure enlarged diagram of tool rest drive block of the present invention.
[specific embodiment]
The disc type reamer as shown in figure 1 to figure 13, comprises the main shaft 1 that is connected on motor output shaft; Described main shaft 1 one ends are connected with the aperture adjustment dish 2 of a circle, and aperture adjustment dish 2 rotary sleeves are loaded in the cutterhead 3 that its front end arranges, and the rear side of cutterhead 3 is provided with and the nested embeded slot that coordinates 30 of aperture adjustment dish 2; Upwards be provided with 4 pairs of blade assemblies 5 that arrange with respect to cutterhead 3 Central Symmetries in the footpath of cutterhead 3 positive front sides, described blade assembly 5 comprises blade 50, tool holder head 51 and the tool rest drive block 52 that is fixed on tool holder head 51 forms, blade 50 vertically is fixed on tool holder head 51, both sides, front and back in tool holder head 51 are respectively equipped with blade holddown groove 510, and described blade 50 is fixed in the blade holddown groove 510 of tool holder head 51 front sides or rear side by screw 500.As extremely shown in Figure 10 in Fig. 1, Fig. 8, described tool holder head 51 forms " work " word groove 511 with the both sides of tool rest drive block 52 junctions, corresponding cutterhead 3 radially is provided with inverted T-shape slot 31, and tool holder head 51 is set in the inverted T-shape slot of cutterhead 3 and can radially slides with " work " word groove 511 of tool rest drive block 52 junctions; As extremely shown in Figure 9 in Fig. 1, be provided with the involute shape helicla flute 20 of arranging whole card in aperture adjustment dish 2 inboards, corresponding tool rest drive block 52 bottom sides are provided with 5 revolve tooth pieces 520 of respectively coordinating different from helicla flute, also be provided with the arcuate socket 21 that a plurality of and inboard helicla flute 20 connects in aperture adjustment dish 2 outsides; Rotate aperture adjustment plate 2 and drive symmetrically arranged all tool holder head 51 along the T-shape slot 31 of cutterhead 3 in opposite directions or opposing movement, adjustment is arranged in pairs in the size in the diametric tool holder head 51 of cutterhead 3 and cutter thereof 50 preprocessing apertures, also is provided with on cutterhead 3 and prevents that tool holder head 51 from skidding off the tool rest limiting card 32 of T-shape slot 31.
As Fig. 1 and shown in Figure 6, also be provided with the graduation mark 6 of determining preprocessing aperture size between cutterhead 3 cutters 50 in cutterhead 3 fronts, be convenient to adjust a plurality of blade assemblies 5 of being furnished with on it in opposite directions or opposing moving interval by the graduation mark 6 on cutterhead 3, reach the diameter in predetermined adjustment processing aperture; In addition, reaming also is installed on main shaft 1 adds the dust cover 7 that prevents that wood chip from splashing man-hour, the centre drill 10 of being convenient to treat perforate centering also is installed in cutterhead 3 front center, the blade pretension be convenient on cutterhead 3 also is installed in the main spring 8 of to be processed at main shaft 1 rear side.
As Fig. 5, Fig. 8 to Figure 10, shown in Figure 13, described tool rest drive block 52 is " protruding " word shape, tool holder head 51 is provided with the groove 512 that coordinates with the plush copper 521 of tool rest drive block 52, it is interior fixing by dog screw 522 that the plush copper 521 of tool rest drive block 52 is inserted the groove 512 of tool holder head 51, and will be locked on cutterhead 3 along the tool holder head 51 of sliding on cutterhead 3.
as shown in Figure 1, also be provided with at dust cover 7 rear sides and lock the retaining pin module 9 that aperture adjustment plate 2 rotatablely moves with respect to cutterhead 3, retaining pin module 9 comprises bayonet lock exterior nut cap 90, bayonet lock spring 91, nominal screw 93 in bayonet lock 92 and bayonet lock, dust cover 7 is provided with the pin hole 70 that coordinates with bayonet lock 92, bayonet lock 92 1 ends pass the pin hole 70 of dust cover 7, bayonet lock spring 91 is socketed on bayonet lock 92 outsides and is fixed on bayonet lock 92 by bayonet lock exterior nut cap 90, bayonet lock 92 other ends are installed nominal screw 93 in bayonet lock, can match with an arcuate socket 21 on aperture adjustment dish 2 after pressing bayonet lock 92.Offer at main shaft 1 rear side and intert that instrument is convenient to control or the through hole a of rotary main shaft when adjusting blade processing pore size.
in use procedure of the present invention, when needs are adjusted the processing pore size of blade 50, at first, unclamp dog screw 522 fastening to each tool holder head 51 on cutterhead 3, namely by unclamping dog screw 522, make being connected of fixedly tool holder head 51 and tool rest drive block 52 loosening, do not make blade assembly 5 is being lock onto on cutterhead 3, then press the bayonet lock 92 of dust cover 7 rear sides, bayonet lock 92 other ends pass nominal screw 93 in bayonet lock and match with an arcuate socket 21 on aperture adjustment dish 2, controlling cutterhead 3 does not rotate, driving aperture adjustment dish 2 by rotation dust cover 7 rotates with respect to cutterhead 3, because the helicla flute 20 on aperture adjustment dish 2 matches with the tooth piece 520 of tool rest drive block 52 bottom sides, counterclockwise or clockwise rotate aperture adjustment dish 2, can drive symmetrically arranged all tool holder head 51 along the T-shape slot 31 of cutterhead 3 in opposite directions or opposing movement, adjustment is arranged in pairs in the size in the preprocessing aperture of cutterhead 3 diametric(al) cutter assemblies 5, after reaching the preset aperture size, again by each dog screw 522 fastening each tool holder head 51 and tool rest drive block 52, reach blade assembly 5 is lock onto on cutterhead 3, bayonet lock 92 other ends are extracted from the arcuate socket 21 on aperture adjustment dish 2, this disc type reamer can use.
The above embodiment for preferred embodiment of the present invention, is not just to limit practical range of the present invention with this; Obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite; The equivalence that all shapes according to the present invention, structure and principle are done changes, and all should be covered by in protection scope of the present invention.
Claims (10)
1. the disc type reamer, comprise the main shaft that is connected on motor output shaft; It is characterized in that:
Described main shaft one end is connected with the aperture adjustment dish of a circle, and the aperture adjustment disc spins is set in the cutterhead that its front end arranges, and the rear side of cutterhead is provided with and the nested embeded slot that coordinates of aperture adjustment dish;
The footpath of the positive front side of described cutterhead upwards is provided with at least one pair of blade assembly that arranges with respect to the cutterhead Central Symmetry, described blade assembly comprises blade, tool holder head and the tool rest drive block that is fixed on tool holder head forms, blade vertically is fixed on tool holder head, the both sides of described tool holder head and tool rest drive block junction form " work " word groove, corresponding cutterhead radially is provided with inverted T-shape slot, and " work " word groove of tool holder head and tool rest drive block junction is set in the inverted T-shape slot of cutterhead and also can radially slides;
Described aperture adjustment dish inboard is provided with the involute shape helicla flute of arranging whole card, and corresponding tool rest drive block bottom side is provided with a plurality of tooth pieces that coordinate with helicla flute; Rotate the aperture adjustment plate and drive symmetrically arranged all tool rest drive blocks and tool holder head along the T-shape slot of cutterhead in opposite directions or opposing movement, adjust the size in the tool holder head that is arranged in pairs in the cutter diameter direction and cutter preprocessing aperture thereof.
2. disc type reamer according to claim 1, is characterized in that, described cutterhead front also is provided with the graduation mark of determining cutterhead cutter preprocessing aperture size.
3. disc type reamer according to claim 1, it is characterized in that, described tool rest drive block is " protruding " word shape, tool holder head is provided with the groove that coordinates with the plush copper of tool rest drive block, is fixed and will be locked on cutterhead along the tool holder head of sliding on cutterhead by dog screw in the groove of the plush copper insertion tool holder head of tool rest drive block.
4. disc type reamer according to claim 1, is characterized in that, is provided with the arcuate socket that a plurality of and inboard helicla flute connects outside described aperture adjustment dish.
5. disc type reamer according to claim 1, is characterized in that, dust cover also is installed on described main shaft.
6. according to claim 4 with 5 described disc type reamers, it is characterized in that, described dust cover rear side also is provided with locks the retaining pin module that the aperture adjustment plate rotatablely moves with respect to cutterhead, described retaining pin module comprises nominal screw in bayonet lock exterior nut cap, bayonet lock spring, bayonet lock and bayonet lock, dust cover is provided with the pin hole that coordinates with bayonet lock, after the bayonet lock spring housing is connected to bayonet lock and is installed on the pin hole of dust cover, bayonet lock one end is fixed in by the bayonet lock exterior nut cap in the outside, and the bayonet lock other end is installed in bayonet lock after nominal screw with arcuate socket on described aperture adjustment dish and matched.
7. disc type reamer according to claim 1, is characterized in that, described cutterhead front center also is equipped with the centre drill of being convenient to treat perforate centering.
8. disc type reamer according to claim 1, is characterized in that, described main shaft rear side also is equipped with the blade pretension be convenient on cutterhead in the main spring of to be processed.
9. disc type reamer according to claim 1, is characterized in that, the both sides, front and back of described tool rest are respectively equipped with the blade holddown groove, and described blade is fixed in the blade holddown groove of tool rest front side or rear side by screw.
10. disc type reamer according to claim 1, is characterized in that, also is provided with on described cutterhead to prevent that tool holder head from skidding off the tool rest limiting card of T-shape slot.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100958228A CN103143753A (en) | 2013-03-22 | 2013-03-22 | Disc-type underreamer |
| PCT/CN2013/074757 WO2014146319A1 (en) | 2013-03-22 | 2013-04-26 | Disc-type underreamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100958228A CN103143753A (en) | 2013-03-22 | 2013-03-22 | Disc-type underreamer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103143753A true CN103143753A (en) | 2013-06-12 |
Family
ID=48542223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100958228A Pending CN103143753A (en) | 2013-03-22 | 2013-03-22 | Disc-type underreamer |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103143753A (en) |
| WO (1) | WO2014146319A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108031890A (en) * | 2017-11-26 | 2018-05-15 | 亳州沃野知识产权服务有限公司 | A kind of grooved bit of adjustable aperture |
| CN108792491A (en) * | 2018-08-31 | 2018-11-13 | 烟台宇信科技有限公司 | A kind of variable flexible compression supporting and positioning device of diameter |
| CN112743371A (en) * | 2021-01-27 | 2021-05-04 | 佛山市顺德区郑敬诒职业技术学校(佛山市顺德区伦教成人文化技术学校) | Tool changing mechanism of numerical control lathe |
| DE202015009952U1 (en) | 2015-11-11 | 2021-11-23 | Wolfcraft Gmbh | Hole saw |
| CN114523320A (en) * | 2021-11-04 | 2022-05-24 | 杭州大和热磁电子有限公司 | Adjusting tool for machining lathe claw |
| CN116255095A (en) * | 2023-02-09 | 2023-06-13 | 泰安中联水泥有限公司 | Equipment for accurately positioning surface mine drilling and use method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015119431A1 (en) | 2015-11-11 | 2017-05-11 | Wolfcraft Gmbh | Hole Saw |
| CN108457664A (en) * | 2018-04-12 | 2018-08-28 | 南京工业职业技术学院 | Impact cutterhead and heading end |
| CN112826423B (en) * | 2020-12-31 | 2024-04-23 | 上海澳华内镜股份有限公司 | Aperture component |
| CN113183682A (en) * | 2021-06-17 | 2021-07-30 | 聊城大学 | Axle center distance adjustable auto wheel loading and unloading mechanism and device |
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| CN2299680Y (en) * | 1997-07-21 | 1998-12-09 | 刘圣然 | Reamer |
| US6048141A (en) * | 1998-01-06 | 2000-04-11 | Emhart Inc. | Tool for enlarging hole |
| JP2006000944A (en) * | 2004-05-20 | 2006-01-05 | House Bm Co Ltd | Reaming cutter |
| CN1935425A (en) * | 2006-10-19 | 2007-03-28 | 王诚信 | Multifunctional transposable diameter-adjustable multitool machine boring tool |
| CN203184718U (en) * | 2013-03-22 | 2013-09-11 | 屈元财 | Disc-type reamer |
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| GB228653A (en) * | 1923-11-15 | 1925-02-12 | Wynn Timmins & Company Ltd | Improvements in or relating to annular and sweep drills or cutters |
| US3771895A (en) * | 1972-03-31 | 1973-11-13 | Skil Corp | Adjustable cutting tool |
| FR2704790B3 (en) * | 1993-05-05 | 1995-07-28 | Dieu Andre | Adjustable hole saw with variable diameter. |
| CN201079855Y (en) * | 2007-10-10 | 2008-07-02 | 青岛港（集团）有限公司 | Multi-purpose cutting tool |
| NL1037625C2 (en) * | 2010-01-15 | 2011-07-20 | Rudolf Andreas Stuivenberg | ASSISTANCE TOOLS AT DRILLS. |
| US8840344B2 (en) * | 2011-08-12 | 2014-09-23 | Bruce Winter Stenman | Adjustable hole cutters |
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- 2013-04-26 WO PCT/CN2013/074757 patent/WO2014146319A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2673555A1 (en) * | 1991-03-07 | 1992-09-11 | Safety | Adjustable reamer |
| CN2267885Y (en) * | 1996-01-11 | 1997-11-19 | 张大铭 | Multifunction combined high-efficiency engineering broaching bit |
| CN2299680Y (en) * | 1997-07-21 | 1998-12-09 | 刘圣然 | Reamer |
| US6048141A (en) * | 1998-01-06 | 2000-04-11 | Emhart Inc. | Tool for enlarging hole |
| JP2006000944A (en) * | 2004-05-20 | 2006-01-05 | House Bm Co Ltd | Reaming cutter |
| CN1935425A (en) * | 2006-10-19 | 2007-03-28 | 王诚信 | Multifunctional transposable diameter-adjustable multitool machine boring tool |
| CN203184718U (en) * | 2013-03-22 | 2013-09-11 | 屈元财 | Disc-type reamer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202015009952U1 (en) | 2015-11-11 | 2021-11-23 | Wolfcraft Gmbh | Hole saw |
| CN108031890A (en) * | 2017-11-26 | 2018-05-15 | 亳州沃野知识产权服务有限公司 | A kind of grooved bit of adjustable aperture |
| CN108792491A (en) * | 2018-08-31 | 2018-11-13 | 烟台宇信科技有限公司 | A kind of variable flexible compression supporting and positioning device of diameter |
| CN108792491B (en) * | 2018-08-31 | 2024-05-14 | 烟台宇信科技有限公司 | Diameter-variable telescopic compaction supporting and positioning device |
| CN112743371A (en) * | 2021-01-27 | 2021-05-04 | 佛山市顺德区郑敬诒职业技术学校(佛山市顺德区伦教成人文化技术学校) | Tool changing mechanism of numerical control lathe |
| CN114523320A (en) * | 2021-11-04 | 2022-05-24 | 杭州大和热磁电子有限公司 | Adjusting tool for machining lathe claw |
| CN116255095A (en) * | 2023-02-09 | 2023-06-13 | 泰安中联水泥有限公司 | Equipment for accurately positioning surface mine drilling and use method |
| CN116255095B (en) * | 2023-02-09 | 2023-11-17 | 泰安中联水泥有限公司 | Equipment for accurately positioning surface mine drilling and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014146319A1 (en) | 2014-09-25 |
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Application publication date: 20130612 |