CN201446412U - Novel arc-surface drilling jig - Google Patents

Novel arc-surface drilling jig Download PDF

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Publication number
CN201446412U
CN201446412U CN2009200340703U CN200920034070U CN201446412U CN 201446412 U CN201446412 U CN 201446412U CN 2009200340703 U CN2009200340703 U CN 2009200340703U CN 200920034070 U CN200920034070 U CN 200920034070U CN 201446412 U CN201446412 U CN 201446412U
Authority
CN
China
Prior art keywords
bearing
fixed
base
anchor clamps
hinge axis
Prior art date
Application number
CN2009200340703U
Other languages
Chinese (zh)
Inventor
张军财
王卫刚
唐琳
杜淑萍
刘宏亮
Original Assignee
宝鸡石油机械有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宝鸡石油机械有限责任公司 filed Critical 宝鸡石油机械有限责任公司
Priority to CN2009200340703U priority Critical patent/CN201446412U/en
Application granted granted Critical
Publication of CN201446412U publication Critical patent/CN201446412U/en

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Abstract

The utility model relates to a novel arc-surface drilling jig, which is combined for use by a base, a supporting seat, a drilling template, a compression device, a stretching screw, an aligning tip, a fixing drill bush, a quick-changing drill bush, a hinge axis assembly and other parts. The arc-surface drilling jig can complete the processing for a hole on the circular arc camber of a workpiece.

Description

The boring anchor clamps of novel arc surface

Technical field

The utility model belongs to machining, manufacturing process and equipment technical field, is specifically related to the boring anchor clamps of a kind of novel arc surface.

Background technology

In general, the manufacturing procedure more complicated in hole, especially circular arc camber upper shoulder hole drilling operating difficult operation especially on the arc surface.Because will on arc surface, process shoulder hole very accurately, should consider how to be easy to clamping and reduce clamping deformation, inaccurate and the easily broken difficult problem of drill bit in location is simultaneously also easy to use when considering again to hole on curved surface, so that the satisfied demand of producing in enormous quantities.According to the line processing or the digital control processing of routine, working (machining) efficiency and quality are all undesirable.

Summary of the invention

The technical problem that the utility model solves: provide a kind of novel arc surface boring anchor clamps, it can finish the processing in hole on the workpiece circular arc camber by, fixing being used in combination of drill bushing, quick change drill bushing and hinge axis assembly parts top by base, supporting seat, bushing plate, hold down gag, adjustment screw rod, centering.

The technical solution adopted in the utility model: the boring anchor clamps of a kind of novel arc surface, comprise base, side at base is fixed with the hinge axis bearing, opposite side is fixed with the eyelet bolt bearing, adjust the seat bearing and be connected to a fixed on base with hinge axis bearing and eyelet bolt bearing respectively, adjust the seat bearing and be provided with by the unsteady adjustment screw rod that workpiece is carried out supplemental support of adjusting; Be fixed with at the front end of base and which is provided with the top bearing of the top centering of centering, the rear end is fixed with the holding device bearing which is provided with fastening screw; On base, be provided with supporting screw and utilize the side workpiece to be carried out the contour v block of axial location; One end of bushing plate is cylinder and is connected on the hinge axis bearing by the hinge axis assembly, and the other end of bushing plate is provided with positioning spigot and cooperates the back to compress with the eyelet bolt setscrew nut to be connected with the bearing pin assembly with stage seam on the eyelet bolt bearing again; The two ends, the left and right sides of bushing plate are equipped with fixing drill bushing and are placed in it and are fixed in quick change drill bushing on the bushing plate with the drill bushing screw, and the centre of bushing plate is provided with hold down gag.

Described bushing plate is two and is fixed together by steel pipe.

Described v block is six, its opposite face top rake, and be provided with stiffener.

Described hinge axis bearing, eyelet bolt bearing and an adjustment seat bearing are two.

Described hold down gag is made of handlebar, clamping screw, the platen seat that is fixed on the clamping screw top, adjustment jackscrew and compact heap.

Described compact heap is a copper material.

Be provided with sleeve in the hole on the top bearing of described centering.

The Si Jiaochu of described base upper surface is provided with four lifting bolts and four U type grooves.

The utility model advantage compared with prior art:

1, clamping, centering operation are all finished in a clamping, saved and draw hole processing line operation;

2, under the prerequisite that improves crudy, do not increase the equipment cost expense;

3, can effectively protect tool damage, improve the service life of cutter, reduce cost;

4, original relatively processing method, working (machining) efficiency has had very big raising, and crudy is very stable;

5, for the operator, mode of operation is greatly simplified, and is convenient and safe;

6, novel structure uniqueness is for design, the research and development manufacturing of clip-like provide thinking and practical experience from now on.

Description of drawings

Fig. 1 is the utility model structural front view;

Fig. 2 is the utility model structure left view;

Fig. 3 is the A-A cutaway view of Fig. 1;

Fig. 4 is the B-B cutaway view of Fig. 1;

Fig. 5 cuts open figure for the C-C of Fig. 1;

Fig. 6 is a base front view of the present utility model;

Fig. 7 is that the A of Fig. 6 is to view;

Fig. 8 is the utility model bushing plate structural front view;

Fig. 9 is the A-A cutaway view of Fig. 8;

Figure 10 is that the A of Fig. 8 is to view;

Figure 11 is a hold down gag schematic diagram of the present utility model.

The specific embodiment

Describe structure of the present utility model and operation principle in detail below in conjunction with accompanying drawing.

The boring anchor clamps of a kind of novel arc surface, comprise base 20, side at base 20 is fixed with two hinge axis bearings 19, opposite side is fixed with two eyelet bolt bearings 22, adjust seat bearing 21 and be connected to a fixed on base 20 with hinge axis bearing 19 and eyelet bolt bearing 22 respectively, adjust seat bearing 21 and be provided with by the unsteady adjustment screw rod 2 that workpiece is carried out supplemental support of adjusting; Front end at base 20 is fixed with the top bearing 23 of the centering which is provided with centering top 13, is provided with sleeve 18 in the hole on the top bearing 23 of centering, and the rear end is fixed with the holding device bearing 24 which is provided with fastening screw 15; Be provided with two supporting screws 14 and utilize the side that workpiece 17 is carried out the contour v block 16 of axial location on base 20, v block 16 is six, its opposite face top rake, and be provided with stiffener 33; Bushing plate 7 is two and is fixed together by steel pipe, one end of bushing plate 7 is cylinder and is connected on the hinge axis bearing 19 by hinge axis assembly 12, and the other end of bushing plate 7 is provided with positioning spigot 32 and cooperates the back to compress with eyelet bolt 8 setscrew nuts 9 to be connected with bearing pin assembly 11 with stage seam 28 on the eyelet bolt bearing 22 again; The two ends, the left and right sides of bushing plate 7 are equipped with fixing drill bushing 5 and are placed in it and are fixed in quick change drill bushing 4 on the bushing plate 7 with drill bushing screw 3, the centre of bushing plate 7 is provided with hold down gag 6, hold down gag is made of handlebar 26, clamping screw 27, the platen seat 29 that is fixed on clamping screw 27 tops, adjustment jackscrew 28 and compact heap 30, compact heap 38 is a copper material, effectively protect workpiece 17 to use the surface, prevented workpiece 17 distortion in compaction process simultaneously; The Si Jiaochu of base 20 upper surfaces is provided with four lifting bolts 10 and four U type grooves.

The utility model course of work: at first, nut 9 is unclamped, eyelet bolt 8 is screwed into the right along rotating shaft, two place's bushing plates 7 can be rotated freely around hinge axis 12; With bushing plate 7 along hinge axis 12 spin-ups, locate workpiece 17 on 4 identical v blocks 16 that are placed in the clamp body with cylindrical, utilize 4 of the clamp body both sides to adjust bolt 2, regulate the workpiece left and right directions, make that the circular arc of drawing vertically divides center line over against the centering of clamp body end face top 13 on the workpiece end face, workpiece 17 is in the adjustment process of the left and right sides, all the time tangent with v block 16, can guarantee that by this operation circular arc symmetry branch center line is perpendicular to the clamp body bottom surface, work top just, simultaneously with about 16 fens center lines of two groups of v blocks overlaps. since during the center line manufacturing in 16 fens of drill bushing hole on two place's bushing plates 7 and v block the assurance of strictness size between the two, so also just very strict assurance the size of hole in dividing with the circular arc symmetry. next, workpiece 17 is held out against with fastening screw 15 vertically, make the big cylindrical step end face of workpiece 17 1 ends cut v block 16 inner faces of top 13 1 sides of tight centering, since the assurance of the strictness during of the drill bushing hole on two place's bushing plates 7 with the manufacturing of v block 16 inner faces size between the two, so also just very strict assurance the size of hole with workpiece 17 end faces. different owing to the big cylindrical step end face in two ends simultaneously with little cylindrical face size, therefore if want workpiece 17 is put in the other direction, to can not be placed between two v blocks 16. by above operation, can fully workpiece 17 be positioned at Working position accurately. regulate supporting screw 14, it is contacted with workpiece 17 exterior arc surfaces, play the supplemental support effect. two place's bushing plates 7 are screwed off along hinge axis 12, its right-hand member positioning spigot 22 is cooperated with seam on the eyelet bolt bearing 22, owing to limited the bushing plate 7 six direction frees degree respectively with the seam on left end hinge axis 12 and right-hand member eyelet bolt 8 holders, so accurate in locating very. the drill bushing hole guarantees that with processing method very accurate position concerns with seam on left end hinge axis 12 and right-hand member eyelet bolt 8 holders on two place's bushing plates 7 simultaneously, and very strict during fabrication assurance the size between the seam on hinge axis 12 and right-hand member eyelet bolt 8 holders and the 4 identical v blocks 16, so can guarantee pitch-row and hole and face size very accurately. last, with eyelet bolt 8 two place's bushing plates 7 are compressed, with two place's hold down gags 6 workpiece 17 is compressed again, aperture with bit drills quick change drill bushing 4 correspondences, remove quick change drill bushing 4, bore the shoulder hole of fixing drill bushing 5 correspondences, unclamp nut 9 then, rotation eyelet bolt 8, spin-up bushing plate 7, workpiece 17 is taken out, has promptly finished processing hole on the workpiece 17.

Claims (7)

1. boring anchor clamps of novel arc surface, comprise base (20), it is characterized in that: the side at base (20) is fixed with hinge axis bearing (19), opposite side is fixed with eyelet bolt bearing (22), adjust seat bearing (21) and be connected to a fixed on base (20) with hinge axis bearing (19) and eyelet bolt bearing (22) respectively, adjust seat bearing (21) and be provided with by the unsteady adjustment screw rod (2) that workpiece is carried out supplemental support of adjusting; Front end at base (20) is fixed with the top bearing of centering (23) which is provided with centering top (13), and the rear end is fixed with the holding device bearing (24) which is provided with fastening screw (15); On base (20), be provided with supporting screw (14) and utilize the side workpiece (17) to be carried out the contour v block (16) of axial location; One end of bushing plate (7) is cylinder and is connected on the hinge axis bearing (19) by hinge axis assembly (12) that the other end of bushing plate (7) is provided with positioning spigot (32) and uses bearing pin assembly (11) to be connected again with back the compressing with eyelet bolt (8) setscrew nut (9) of stage seam (28) cooperation on the eyelet bolt bearing (22); The two ends, the left and right sides of bushing plate (7) are equipped with fixing drill bushing (5) and are placed in it and are fixed in quick change drill bushing (4) on the bushing plate (7) with drill bushing screw (3), and the centre of bushing plate (7) is provided with hold down gag (6).
2. the boring anchor clamps of a kind of novel arc surface according to claim 1 is characterized in that: described bushing plate (7) is two and is fixed together by steel pipe.
3. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2, it is characterized in that: described v block (16) is six, its opposite face top rake, and be provided with stiffener (33).
4. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: described hinge axis bearing (19), eyelet bolt bearing (22) and an adjustment seat bearing (21) are two.
5. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: described hold down gag (6) by the horizontal handlebar (26) that is inserted in clamping screw (27) upper end, be fixed on the platen seat (29) of clamping screw (27) bottom and the compact heap (30) that is arranged on the adjustment jackscrew (28) of platen seat (29) both sides and is arranged on platen seat (29) downside constitutes
6. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: be provided with sleeve (18) in the hole on the top bearing of described centering (23)
7. the boring anchor clamps of a kind of novel arc surface according to claim 1 and 2 is characterized in that: the Si Jiaochu of described base (20) upper surface is provided with four lifting bolts (10) and four U type grooves.
CN2009200340703U 2009-07-30 2009-07-30 Novel arc-surface drilling jig CN201446412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009200340703U CN201446412U (en) 2009-07-30 2009-07-30 Novel arc-surface drilling jig

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009200340703U CN201446412U (en) 2009-07-30 2009-07-30 Novel arc-surface drilling jig

Publications (1)

Publication Number Publication Date
CN201446412U true CN201446412U (en) 2010-05-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009200340703U CN201446412U (en) 2009-07-30 2009-07-30 Novel arc-surface drilling jig

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Country Link
CN (1) CN201446412U (en)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102225476A (en) * 2011-06-10 2011-10-26 翁贞琼 Drill jig for valve plate of injection-molding machine
CN102601600A (en) * 2011-12-09 2012-07-25 首钢总公司 HGC (hydraulic gap control) hydraulic cylinder replacement system
CN102689036A (en) * 2012-06-14 2012-09-26 无锡环宇精密铸造有限公司 Positioning die for machining screw hole of top-mounted valve body base
CN102717278A (en) * 2012-07-12 2012-10-10 苏州海陆重工股份有限公司 Arc-shaped sphere shell weld seam groove preparation tooling
CN103028973A (en) * 2012-12-14 2013-04-10 芜湖市中兴机械技术开发有限公司 Beam central tube drilling tool for automotive dashboard
CN103084864A (en) * 2012-11-06 2013-05-08 无锡市航鹄科技有限公司 High-precision positioning and adjusting clamp
CN103228405A (en) * 2011-03-03 2013-07-31 三菱重工业株式会社 Machine tool
CN103252661A (en) * 2013-05-18 2013-08-21 安徽联友压力容器有限公司 Gas cylinder bottom fixing device
CN103612139A (en) * 2013-11-28 2014-03-05 昆山诺瑞信机械设备有限公司 Fixing clamp special for ring drilling
CN103659360A (en) * 2013-11-28 2014-03-26 无锡市航鹄科技有限公司 Arc-shaped plate groove milling positioning device
CN104070371A (en) * 2013-03-25 2014-10-01 上海众源燃油分配器制造有限公司 Tool for drilling cooling water pipe
CN104148962A (en) * 2014-07-21 2014-11-19 芜湖恒坤汽车部件有限公司 Clamping device for clutch master cylinder
CN104227448A (en) * 2014-09-11 2014-12-24 河南飞龙(芜湖)汽车零部件有限公司 Hole aligning device used for moving type axis part drilling fixture
CN104476256A (en) * 2014-12-13 2015-04-01 遵义金惠机械制造有限责任公司 Fixing device for use in machining of connecting disk
CN104646935A (en) * 2014-03-28 2015-05-27 梧州奥卡光学仪器有限公司 Processing method for revolving shaft supporting seat
CN104708335A (en) * 2013-12-12 2015-06-17 铜陵市永生机电制造有限责任公司 Clamp for drilling of shaft part central eye
CN104759904A (en) * 2014-01-06 2015-07-08 海洋王(东莞)照明科技有限公司 Drilling auxiliary device of extension block protective cover of lamps
CN105252293A (en) * 2015-10-28 2016-01-20 成都振中电气有限公司 Angle adjusting method for fixing during cutting of arc plate of power distribution cabinet
CN105252074A (en) * 2015-10-28 2016-01-20 成都振中电气有限公司 Cutting method based arc cabinet door cutting
CN105269363A (en) * 2015-11-28 2016-01-27 孙新梅 Heating drilling tool for V-shaped workpiece
CN105269362A (en) * 2015-11-28 2016-01-27 孙新梅 Drilling tool for heating drilling type V-shaped part
CN105290810A (en) * 2015-10-31 2016-02-03 安新生 Counting-type W-type workpiece tapping tool
CN105328472A (en) * 2015-11-28 2016-02-17 孙新梅 Special drilling tool for V-shaped piece
CN105364567A (en) * 2015-10-28 2016-03-02 成都振中电气有限公司 Device for adjusting angle of arc-shaped board of distribution cabinet in cutting and fixing processes
CN105364570A (en) * 2015-10-28 2016-03-02 成都振中电气有限公司 Dual-purpose fixing mechanism for cutting arc-shaped board
CN105364569A (en) * 2015-10-28 2016-03-02 成都振中电气有限公司 Cutting auxiliary fixing device for arc-shaped cabinet door
CN105537991A (en) * 2015-12-29 2016-05-04 南车眉山车辆有限公司 Adapter drilling fixture
CN105921792A (en) * 2016-07-06 2016-09-07 哈尔滨理工大学 Drill jig used for rear axle shell machining
CN105945319A (en) * 2016-06-15 2016-09-21 沈阳飞机工业(集团)有限公司 Method for accurate numerically-controlled drilling on large-curvature arc surface
CN106078252A (en) * 2016-06-30 2016-11-09 湖北三江航天红阳机电有限公司 A kind of with fiberglass cambered surface and the clamp for machining of ladder hole type parts and processing method
CN106270655A (en) * 2015-06-11 2017-01-04 哈尔滨飞机工业集团有限责任公司 A kind of drilling guide tool
CN106514350A (en) * 2016-12-23 2017-03-22 重庆太乙机械有限公司 Drilling fixture
CN106624895A (en) * 2016-12-23 2017-05-10 重庆太乙机械有限公司 Drilling clamp for special-shaped bent pipes
CN108705126A (en) * 2018-05-29 2018-10-26 沈阳飞机工业(集团)有限公司 The accurate processing method of the porous anti-deformation of arc thin-wall pipe fitting normal direction
CN108972043A (en) * 2018-06-28 2018-12-11 北京北机机电工业有限责任公司 A kind of bicylindrical positioning fixture

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CN103228405A (en) * 2011-03-03 2013-07-31 三菱重工业株式会社 Machine tool
CN103228405B (en) * 2011-03-03 2016-08-10 三菱重工业株式会社 Lathe
CN102225476A (en) * 2011-06-10 2011-10-26 翁贞琼 Drill jig for valve plate of injection-molding machine
CN102601600A (en) * 2011-12-09 2012-07-25 首钢总公司 HGC (hydraulic gap control) hydraulic cylinder replacement system
CN102601600B (en) * 2011-12-09 2014-07-23 首钢总公司 HGC (hydraulic gap control) hydraulic cylinder replacement system
CN102689036A (en) * 2012-06-14 2012-09-26 无锡环宇精密铸造有限公司 Positioning die for machining screw hole of top-mounted valve body base
CN102717278A (en) * 2012-07-12 2012-10-10 苏州海陆重工股份有限公司 Arc-shaped sphere shell weld seam groove preparation tooling
CN103084864A (en) * 2012-11-06 2013-05-08 无锡市航鹄科技有限公司 High-precision positioning and adjusting clamp
CN103028973A (en) * 2012-12-14 2013-04-10 芜湖市中兴机械技术开发有限公司 Beam central tube drilling tool for automotive dashboard
CN104070371A (en) * 2013-03-25 2014-10-01 上海众源燃油分配器制造有限公司 Tool for drilling cooling water pipe
CN103252661A (en) * 2013-05-18 2013-08-21 安徽联友压力容器有限公司 Gas cylinder bottom fixing device
CN103659360B (en) * 2013-11-28 2015-10-21 无锡市航鹄科技有限公司 Arc groove milling positioner
CN103659360A (en) * 2013-11-28 2014-03-26 无锡市航鹄科技有限公司 Arc-shaped plate groove milling positioning device
CN103612139A (en) * 2013-11-28 2014-03-05 昆山诺瑞信机械设备有限公司 Fixing clamp special for ring drilling
CN104708335A (en) * 2013-12-12 2015-06-17 铜陵市永生机电制造有限责任公司 Clamp for drilling of shaft part central eye
CN104759904B (en) * 2014-01-06 2018-10-12 海洋王(东莞)照明科技有限公司 The drilling aid of the socket protective cover of lamps and lanterns
CN104759904A (en) * 2014-01-06 2015-07-08 海洋王(东莞)照明科技有限公司 Drilling auxiliary device of extension block protective cover of lamps
CN104646935A (en) * 2014-03-28 2015-05-27 梧州奥卡光学仪器有限公司 Processing method for revolving shaft supporting seat
CN104646935B (en) * 2014-03-28 2016-09-14 梧州奥卡光学仪器有限公司 The processing method of shaft supporting seat
CN104148962A (en) * 2014-07-21 2014-11-19 芜湖恒坤汽车部件有限公司 Clamping device for clutch master cylinder
CN104227448A (en) * 2014-09-11 2014-12-24 河南飞龙(芜湖)汽车零部件有限公司 Hole aligning device used for moving type axis part drilling fixture
CN104476256A (en) * 2014-12-13 2015-04-01 遵义金惠机械制造有限责任公司 Fixing device for use in machining of connecting disk
CN106270655A (en) * 2015-06-11 2017-01-04 哈尔滨飞机工业集团有限责任公司 A kind of drilling guide tool
CN105252293A (en) * 2015-10-28 2016-01-20 成都振中电气有限公司 Angle adjusting method for fixing during cutting of arc plate of power distribution cabinet
CN105252074A (en) * 2015-10-28 2016-01-20 成都振中电气有限公司 Cutting method based arc cabinet door cutting
CN105252074B (en) * 2015-10-28 2019-03-19 成都振中电气有限公司 Cutting process based on the cutting of arc cabinet door
CN105364567A (en) * 2015-10-28 2016-03-02 成都振中电气有限公司 Device for adjusting angle of arc-shaped board of distribution cabinet in cutting and fixing processes
CN105364570A (en) * 2015-10-28 2016-03-02 成都振中电气有限公司 Dual-purpose fixing mechanism for cutting arc-shaped board
CN105364570B (en) * 2015-10-28 2018-11-23 成都振中电气有限公司 Fixed mechanism is used in the cutting of dual-purpose type arc panel
CN105364569A (en) * 2015-10-28 2016-03-02 成都振中电气有限公司 Cutting auxiliary fixing device for arc-shaped cabinet door
CN105290810A (en) * 2015-10-31 2016-02-03 安新生 Counting-type W-type workpiece tapping tool
CN105269362A (en) * 2015-11-28 2016-01-27 孙新梅 Drilling tool for heating drilling type V-shaped part
CN105269363A (en) * 2015-11-28 2016-01-27 孙新梅 Heating drilling tool for V-shaped workpiece
CN105328472A (en) * 2015-11-28 2016-02-17 孙新梅 Special drilling tool for V-shaped piece
CN105537991A (en) * 2015-12-29 2016-05-04 南车眉山车辆有限公司 Adapter drilling fixture
CN105945319A (en) * 2016-06-15 2016-09-21 沈阳飞机工业(集团)有限公司 Method for accurate numerically-controlled drilling on large-curvature arc surface
CN106078252A (en) * 2016-06-30 2016-11-09 湖北三江航天红阳机电有限公司 A kind of with fiberglass cambered surface and the clamp for machining of ladder hole type parts and processing method
CN106078252B (en) * 2016-06-30 2018-07-06 湖北三江航天红阳机电有限公司 A kind of clamp for machining and processing method with fiberglass cambered surface and ladder hole type parts
CN105921792A (en) * 2016-07-06 2016-09-07 哈尔滨理工大学 Drill jig used for rear axle shell machining
CN106624895A (en) * 2016-12-23 2017-05-10 重庆太乙机械有限公司 Drilling clamp for special-shaped bent pipes
CN106514350A (en) * 2016-12-23 2017-03-22 重庆太乙机械有限公司 Drilling fixture
CN106514350B (en) * 2016-12-23 2018-06-22 重庆太乙机械有限公司 A kind of boring grab
CN108705126A (en) * 2018-05-29 2018-10-26 沈阳飞机工业(集团)有限公司 The accurate processing method of the porous anti-deformation of arc thin-wall pipe fitting normal direction
CN108972043A (en) * 2018-06-28 2018-12-11 北京北机机电工业有限责任公司 A kind of bicylindrical positioning fixture

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