CN203171438U - Fixture for grinding 60-degree counter center of extension drill - Google Patents

Fixture for grinding 60-degree counter center of extension drill Download PDF

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Publication number
CN203171438U
CN203171438U CN 201320229820 CN201320229820U CN203171438U CN 203171438 U CN203171438 U CN 203171438U CN 201320229820 CN201320229820 CN 201320229820 CN 201320229820 U CN201320229820 U CN 201320229820U CN 203171438 U CN203171438 U CN 203171438U
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China
Prior art keywords
hole
face
drill
cylinder
mohs
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Application number
CN 201320229820
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Chinese (zh)
Inventor
魏成双
崔会彬
孙盛丽
曲滨荣
孟庆龙
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Harbin Turbine Co Ltd
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Harbin Turbine Co Ltd
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Publication date
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Priority to CN 201320229820 priority Critical patent/CN203171438U/en
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Publication of CN203171438U publication Critical patent/CN203171438U/en
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Abstract

The utility model discloses a fixture for grinding a 60-degree counter center of an extension drill, and relates to a fixture for grinding the extension drill. The fixture aims at solving the problems that the machining accuracy is low and the quality of the subsequent finish machining is influenced due to low positioning accuracy when a chuck is directly used for clamping a drill to grind the 60-degree counter center currently. A Mohs No. 4 taper shank of a cutter rod is matched with a machine tool spindle taper hole; a circular table hole and an auxiliary hole are formed in the outer end face of a cylinder axially; the inner diameter of the auxiliary hole of the cutter rod is matched with the outer diameter of a straight shank of the drill; an inner hole of a clamping sleeve is matched with the straight shank of the drill; at least two open grooves are formed in a side wall of the clamping sleeve; one end of a clamping nut is provided with a drill through hole; an inner shoulder hole is formed in the other end face of the clamping nut; a cylindrical boss of the clamping sleeve is bonded with the outer end face of the cylinder of the cutter rod; a circular table body of the clamping sleeve is arranged in the circular table hole of the cutter rod, and matched with the circular table hole of the cutter rod; and inner threads of the clamping nut are rotationally connected with outer threads of the cutter rod. The fixture is used for clamping and positioning in a grinding process of the 60-degree counter center of the extension drill.

Description

60 ° of counter center clamps of a kind of extension drill
Technical field
The utility model relates to a kind of extension drill clamp.
Background technology
Extension drill is the dedicated tool (as the axially extending bore of processing casing roller expansion shell, the axially extending bore of processing branch sleeve) of deep hole processing, for the extension drill of bit diameter smaller or equal to 12mm, adopt the welding pattern during processing and manufacturing, the head of extension drill adopts the transformation of the way of standard parallel shank twist drill to form.For guaranteeing the machining accuracy of extension drill, need grind 60 ° of counter centers, adopt chuck directly to clamp 60 ° of counter centers of drill bit grinding, positioning accuracy is low, causes machining accuracy low, influences postorder fine finishining quality.
The utility model content
The purpose of this utility model provides 60 ° of counter center clamps of a kind of extension drill, when directly clamping 60 ° of counter centers of drill bit grinding to solve present employing chuck, exists positioning accuracy low, causes machining accuracy low, influences the problem of postorder fine finishining quality.
The utility model is to address the above problem the technical scheme of taking to be: 60 ° of counter center clamps of extension drill of the present utility model, and 60 ° of counter center clamps of described extension drill comprise knife bar, gripping sleeve and binding nut; Knife bar is made up of cylinder and No. four taper shanks of Mohs, No. four coaxial settings of taper shank of cylinder and Mohs, the large end face of a cylindrical end face and No. four taper shanks of Mohs is made as one, cylindrical external diameter is less than the external diameter of No. four taper shank large end faces of Mohs, the outer conical surface of No. four taper shanks of Mohs matches with the cylindrical grinder spindle taper hole, the small end face of No. four taper shanks of Mohs offers the screwed hole coaxial with No. four taper shanks of Mohs vertically, the lateral surface of cylinder one end is provided with external screw thread, the cylinder outer face offers round platform hole and the fabrication hole coaxial with cylinder vertically from outside to inside successively, round platform hole small end internal diameter equals the internal diameter of fabrication hole, the external diameter of the internal diameter of fabrication hole and drill bit staight shank is complementary, gripping sleeve is made up of Rotary-table and cylindrical boss, cylindrical boss and the coaxial setting of Rotary-table, the large end face of cylindrical boss one end face and Rotary-table is made as one, the cylindrical boss outer end connects vertically and is provided with the endoporus coaxial with cylindrical boss, the external diameter of endoporus aperture and drill bit staight shank is complementary, the Rotary-table outer surface of gripping sleeve is axially arranged with at least two open slots near small end face one side to the sidewall upper edge between the cylindrical boss outer face, at least two open slots evenly distribute along circumference, the center of binding nut one end face offers drill bit vertically and passes through the hole, the center of binding nut other end offers interior shoulder hole vertically, interior shoulder hole and drill bit coaxial and setting that communicates by the hole, offer internal thread on the inwall of interior shoulder hole, fit in the cylinder outer face of the cylindrical boss of gripping sleeve and knife bar, the Rotary-table of gripping sleeve is arranged in the round platform hole of knife bar and the two matches, and the internal thread of binding nut and the external screw thread of knife bar spin.
The beneficial effects of the utility model are: use anchor clamps of the present utility model to improve positioning accuracy greatly, axiality reaches in the 0.02mm after the grinding, the machining accuracy height, because with special fixture clamping drill bit, adding the man-hour drill bit directly locatees, is installed on the anchor clamps endoporus with staight shank, reduce the centering time, the centering time decreased about 10 minutes, improved working (machining) efficiency.
Description of drawings
Fig. 1 is 60 ° of counter center clamps of extension drill assembling front view, and Fig. 2 is the main cutaway view of knife bar 3, and Fig. 3 is the main cutaway view of gripping sleeve 2, and Fig. 4 is the right view of gripping sleeve 2, and Fig. 5 is the front view of binding nut 1, and Fig. 6 is the A-A cutaway view of Fig. 5.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1-Fig. 6 explanation, 60 ° of counter center clamps of extension drill of the present utility model, 60 ° of counter center clamps of described extension drill comprise knife bar 3, gripping sleeve 2 and binding nut 1; Knife bar 3 is made up of cylinder 3-6 and No. four taper shank 3-2 of Mohs, No. four coaxial settings of taper shank 3-2 of cylinder 3-6 and Mohs, the large end face of the end face of cylinder 3-6 and No. four taper shank 3-2 of Mohs is made as one, the external diameter of cylinder 3-6 is less than the external diameter of No. four taper shank 3-2 of Mohs large end face, the outer conical surface of No. four taper shank 3-2 of Mohs matches with the cylindrical grinder spindle taper hole, the small end face of No. four taper shank 3-2 of Mohs offers the screwed hole 3-1 coaxial with No. four taper shank 3-2 of Mohs vertically, the lateral surface of cylinder 3-6 one end is provided with external screw thread 3-4, cylinder 3-6 outer face offers round platform hole 3-3 and the fabrication hole 3-5 coaxial with cylinder 3-6 vertically from outside to inside successively, round platform hole 3-3 small end internal diameter equals the internal diameter of fabrication hole 3-5, the external diameter of the internal diameter of fabrication hole 3-5 and drill bit 1 staight shank 4-1 is complementary, gripping sleeve 2 is made up of Rotary-table 2-1 and cylindrical boss 2-2, cylindrical boss 2-2 and the coaxial setting of Rotary-table 2-1, the large end face of cylindrical boss 2-2 one end face and Rotary-table 2-1 is made as one, cylindrical boss 2-2 outer end connects vertically and is provided with the endoporus 2-3 coaxial with cylindrical boss 2-2, the external diameter of endoporus 2-3 aperture and drill bit 1 staight shank 4-1 is complementary, the Rotary-table 2-1 outer surface of gripping sleeve 2 is axially arranged with at least two open slot 2-4 near small end face one side to the sidewall upper edge between the cylindrical boss 2-2 outer face, at least two open slot 2-4 evenly distribute along circumference, the center of binding nut 1 one end faces offers drill bit vertically by hole 1-2, the center of binding nut 1 other end offers interior shoulder hole 1-3 vertically, interior shoulder hole 1-3 and drill bit coaxial and setting that communicates by hole 1-2, offer internal thread 1-1 on the 1-3 inwall of interior shoulder hole, fit in the cylinder 3-6 outer face of the cylindrical boss 2-2 of gripping sleeve 2 and knife bar 3, the Rotary-table 2-1 of gripping sleeve 2 is arranged in the round platform hole 3-3 of knife bar 3 and the two matches, and the internal thread 1-1 of binding nut 1 and the external screw thread 3-4 of knife bar 3 spin.
The specific embodiment two: in conjunction with Fig. 1, Fig. 3 and Fig. 4 explanation, the quantity of the open slot 2-4 of present embodiment is four.Meet design requirement.Undocumented technical characterictic is identical with the specific embodiment one in the present embodiment.
The specific embodiment three: in conjunction with Fig. 3 and Fig. 4 explanation, the width of the open slot 2-4 of present embodiment is 1mm.Meet design requirement.Undocumented technical characterictic is identical with the specific embodiment one or two in the present embodiment.
The specific embodiment four: in conjunction with Fig. 5 explanation, the shape of cross section of binding nut 1 lateral surface of present embodiment is regular hexagon.Meet design requirement.Undocumented technical characterictic is identical with the specific embodiment one in the present embodiment.
The specific embodiment five: in conjunction with Fig. 5 explanation, the tapering of the Rotary-table 2-1 outer conical surface of present embodiment is 1:30.Meet design requirement.Undocumented technical characterictic is identical with the specific embodiment three in the present embodiment.
During use, No. four taper shank 3-2 of the Mohs of knife bar 3 cooperate with the cylindrical grinder spindle taper hole, realize that the cylindrical grinder main shaft is to the location of knife bar, the threaded interior hole 3-1 of knife bar 3 by stretching screw tightly on the cylindrical grinding machine spindle, realize that the cylindrical grinder main shaft is to the fixed installation of knife bar 3, drill bit 4 staight shank 4-1 are placed in the fabrication hole 3-5, during 60 ° of counter centers of grinding, fabrication hole 3-5 is used for adjusting drill bit 4 extension elongations, the staight shank 4-1 external diameter of the drill bit 4 of endoporus 2-3 of gripping sleeve 2 is realized the location, install, the round platform hole 3-3 inner surface of the Rotary-table 2-1 outer surface of gripping sleeve 2 and knife bar 3 is fitted, realize the location of 3 pairs of gripping sleeves 2 of knife bar, the open slot 2-4 of gripping sleeve 2 makes gripping sleeve 2 have radial tension, by external key binding nut 1 is screwed, make gripping sleeve 2 produce the radical elasticity distortion, drill bit 4 is clamped and installed on the knife bar 3.

Claims (5)

1. 60 ° of counter center clamps of an extension drill, it is characterized in that: it comprises knife bar (3), gripping sleeve (2) and binding nut (1); Knife bar (3) is made up of cylinder (3-6) and No. four taper shanks of Mohs (3-2), cylinder (3-6) and the coaxial setting of No. four taper shanks of Mohs (3-2), the large end face of No. four taper shanks of one end face of cylinder (3-6) and Mohs (3-2) is made as one, the external diameter of cylinder (3-6) is less than the external diameter of No. four taper shanks of Mohs (3-2) large end face, the outer conical surface of No. four taper shanks of Mohs (3-2) matches with the cylindrical grinder spindle taper hole, the small end face of No. four taper shanks of Mohs (3-2) offers the screwed hole (3-1) coaxial with No. four taper shanks of Mohs (3-2) vertically, the lateral surface of cylinder (3-6) end is provided with external screw thread (3-4), cylinder (3-6) outer face offers round platform hole (3-3) and the fabrication hole (3-5) coaxial with cylinder (3-6) vertically from outside to inside successively, round platform hole (3-3) small end internal diameter equals the internal diameter of fabrication hole (3-5), the external diameter of the internal diameter of fabrication hole (3-5) and drill bit (1) staight shank (4-1) is complementary, gripping sleeve (2) is made up of Rotary-table (2-1) and cylindrical boss (2-2), cylindrical boss (2-2) and the coaxial setting of Rotary-table (2-1), the large end face of cylindrical boss (2-2) end face and Rotary-table (2-1) is made as one, cylindrical boss (2-2) outer end connects vertically and is provided with the endoporus (2-3) coaxial with cylindrical boss (2-2), the external diameter of endoporus (2-3) aperture and drill bit (1) staight shank (4-1) is complementary, Rotary-table (2-1) outer surface of gripping sleeve (2) is axially arranged with at least two open slots (2-4) near small end face one side to the sidewall upper edge between cylindrical boss (2-2) outer face, at least two open slots (2-4) evenly distribute along circumference, the center of binding nut (1) one end face offers drill bit vertically by hole (1-2), interior shoulder hole, shoulder hole (1-3) (1-3) and drill bit coaxial and setting that communicates by hole (1-2) in the center of binding nut (1) other end offers vertically, offer internal thread (1-1) on the inwall of interior shoulder hole (1-3), the cylindrical boss (2-2) of gripping sleeve (2) is fitted with cylinder (3-6) outer face of knife bar (3), the Rotary-table (2-1) of gripping sleeve (2) is arranged in the round platform hole (3-3) of knife bar (3) and the two matches, and the internal thread (1-1) of binding nut (1) spins with the external screw thread (3-4) of knife bar (3).
2. according to 60 ° of counter center clamps of the described a kind of extension drill of claim 1, it is characterized in that: the quantity of open slot (2-4) is four.
3. according to claim 1 or 60 ° of counter center clamps of 2 described a kind of extension drills, it is characterized in that: the width of open slot (2-4) is 1mm.
4. according to 60 ° of counter center clamps of the described a kind of extension drill of claim 1, it is characterized in that: the shape of cross section of binding nut (1) lateral surface is regular hexagon.
5. according to 60 ° of counter center clamps of the described a kind of extension drill of claim 3, it is characterized in that: the tapering of Rotary-table (2-1) outer conical surface is 1:30.
CN 201320229820 2013-04-28 2013-04-28 Fixture for grinding 60-degree counter center of extension drill Active CN203171438U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320229820 CN203171438U (en) 2013-04-28 2013-04-28 Fixture for grinding 60-degree counter center of extension drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320229820 CN203171438U (en) 2013-04-28 2013-04-28 Fixture for grinding 60-degree counter center of extension drill

Publications (1)

Publication Number Publication Date
CN203171438U true CN203171438U (en) 2013-09-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111185804A (en) * 2018-10-28 2020-05-22 国营四达机械制造公司 Part taper shank spring grinding tool and machining method
CN113995468A (en) * 2022-01-04 2022-02-01 极限人工智能有限公司 Clamping mechanism, bone drill device and surgical robot

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111185804A (en) * 2018-10-28 2020-05-22 国营四达机械制造公司 Part taper shank spring grinding tool and machining method
CN113995468A (en) * 2022-01-04 2022-02-01 极限人工智能有限公司 Clamping mechanism, bone drill device and surgical robot

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