CN112497065A - Self-centering clamp for inner hole machining - Google Patents

Self-centering clamp for inner hole machining Download PDF

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Publication number
CN112497065A
CN112497065A CN202011362869.2A CN202011362869A CN112497065A CN 112497065 A CN112497065 A CN 112497065A CN 202011362869 A CN202011362869 A CN 202011362869A CN 112497065 A CN112497065 A CN 112497065A
Authority
CN
China
Prior art keywords
positioning
hole
workpiece
pressing
distance
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
Application number
CN202011362869.2A
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Chinese (zh)
Inventor
储永代
张京
刘天
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Original Assignee
Zhuzhou Cemented Carbide Cutting Tools Co Ltd
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 Zhuzhou Cemented Carbide Cutting Tools Co Ltd filed Critical Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Priority to CN202011362869.2A priority Critical patent/CN112497065A/en
Publication of CN112497065A publication Critical patent/CN112497065A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00Component parts such as frames, beds, carriages, headstocks
    • B24B41/06Work supports, e.g. adjustable steadies

Abstract

The invention discloses a self-centering clamp for inner hole machining, which comprises a connecting shaft, positioning seat and briquetting, the connecting axle is including the stalk portion and the positioning core axle of coaxial setting, the stalk portion is used for being connected and the stalk portion diameter is greater than the positioning core axle diameter with the lathe, positioning seat one end is equipped with keeps away the dead eye, the other end is equipped with the mounting groove that is used for installing the work piece, the mounting groove includes the V-arrangement locating surface that can contact the complex with the V-arrangement location portion of work piece, the V-arrangement locating surface extends to and keeps away in the dead eye, the positioning core axle wear to locate in keeping away the dead eye and with V-arrangement locating surface contact fit, the positioning core axle passes through retaining member locking with the positioning seat, be equipped with on the positioning seat and compress tightly the groove, the briquetting is located compress tightly the inslot and be used for compressing tightly the work piece in the mounting groove, the briquetting. The invention has the advantages of high centering precision, convenient operation, reliable clamping, time and labor saving for disassembling the workpiece and high processing efficiency.

Description

Self-centering clamp for inner hole machining
Technical Field
The invention relates to the field of machining, in particular to a self-centering clamp for inner hole machining.
Background
In the field of machining, particularly inner hole machining of numerical control blades, due to the fact that the aperture size is small, the requirements for the size precision and the shape and position precision of the inner hole machining are high, the design requirements can be met only by grinding machining, meanwhile, the size and the shape of numerical control products are different, the common inner hole grinding clamp is high in the position alignment difficulty of the center of a calibration hole when machining is started, the clamp is not high in universality, time and labor are wasted in clamp adjustment, and the labor intensity of an operator is high. The clamping difficulty of the workpiece is high, so that the production efficiency is restricted, the repeated positioning precision of the product is not high during batch production, the unstable product size and quality are not easy to guarantee, and the difficulty in grinding the small inner hole is high.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides an inner hole machining self-centering clamp which is high in centering precision, convenient to operate, reliable in clamping, time-saving and labor-saving in workpiece dismounting and high in machining efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
a self-centering clamp for processing an inner hole comprises a connecting shaft, a positioning seat and a pressing block, wherein the connecting shaft comprises a handle part and a positioning core shaft which are coaxially arranged, the handle part is used for being connected with a machine tool, the diameter of the handle part is larger than that of the positioning core shaft, one end of the positioning seat is provided with a clearance hole, the other end of the positioning seat is provided with a mounting groove for mounting a workpiece, the mounting groove comprises a V-shaped positioning surface which can be in contact fit with the V-shaped positioning part of the workpiece, the V-shaped positioning surface extends into the clearance hole, the positioning core shaft penetrates through the clearance hole and is in contact fit with the V-shaped positioning surface, the positioning core shaft and the positioning seat are locked through a locking piece, the positioning seat is provided with a pressing groove which is communicated with the mounting groove, the pressing block is arranged in the pressing groove and is used for pressing the workpiece in the mounting groove, the pressing block is locked on the positioning seat through a fastening piece, and the distance between the central hole of the workpiece and the V-shaped positioning surface is equal to the distance between the positioning mandrel and the V-shaped positioning surface.
As a further improvement of the above technical solution:
the V-arrangement locating surface includes first side locating surface and second side locating surface, distance is L1 between the centre bore of work piece and the first side locating surface, and the distance between the centre bore of work piece and the second side locating surface is L2, and L1 is L2, the distance of location dabber and first side locating surface is R1 respectively, the distance between location dabber and the second side locating surface is R2, and R1 is R2 is L1 is L2.
The V-arrangement locating surface includes first side locating surface and second side locating surface, distance is L1 between the centre bore of work piece and the first side locating surface, and the distance between the centre bore of work piece and the second side locating surface is L2, and L1 ≠ L2, and the distance of location dabber and first side locating surface is R1 respectively, and the distance between location dabber and the second side locating surface is R2, and R1 ≠ R2, R1 ═ L1, R2 ═ L2.
The mounting groove further comprises an axial positioning surface, the workpiece is abutted against the axial positioning surface, and the axial positioning surface is provided with an avoidance hole which is axially overlapped with the central hole of the workpiece; an inner cooling hole penetrating through the handle part and the positioning core shaft is arranged in the connecting shaft, and the inner cooling hole is communicated with the avoiding hole.
The pressing groove comprises a pressing groove bottom surface and two pressing groove side surfaces, an included angle gamma is formed between the pressing groove bottom surface and the axis C of the connecting shaft, and gamma is more than 0 and less than 90 degrees.
The positioning seat is characterized in that a plane part is arranged on the upper peripheral surface of the positioning seat, the pressing groove is arranged on the plane part, the side surface of the pressing groove is perpendicular to the plane part and the axial positioning surface, and the pressing groove, the plane part and the axial positioning surface are intersected.
Plane portion is equipped with first locking hole, the last second locking hole that is equipped with of positioning core axle, first locking hole and second locking are downthehole to the retaining member is located.
And a scale mark line corresponding to the position of the second locking hole is arranged on the step surface between the handle part and the positioning mandrel.
The included angle of the V-shaped positioning surface is alpha, the included angle of the V-shaped positioning part of the workpiece is beta, and alpha is more than 20 degrees and less than 180 degrees.
The fastener is a stud bolt, a first threaded hole matched with the stud bolt is formed in the pressing block, a second threaded hole matched with the stud bolt is formed in the positioning seat, and the rotating directions of the first threaded hole and the second threaded hole are opposite; and the pressing surface of the pressing block, which is contacted with the workpiece, is parallel to the horizontal plane.
Compared with the prior art, the invention has the advantages that:
the inner hole processing self-centering clamp can ensure that the center hole of the workpiece is completely overlapped with the rotation center of the main shaft, so that the center of the inner hole of a processed product can be quickly and accurately processed without aligning the inner hole (center hole) of the workpiece during processing the center hole of the workpiece. The positioning mandrel is in contact fit with the V-shaped positioning surface, and the workpiece is in contact fit with the V-shaped positioning surface, namely the positioning mandrel and the workpiece are in contact with the same V-shaped positioning surface, so that the rapid installation of the workpiece and the high-precision positioning of the workpiece are realized, and the self-centering effect is achieved; the change of the radius of the outer circular surface of the positioning mandrel is suitable for hole positioning and processing of different central hole positions of different products, and the centering device has the advantages of high centering precision, convenience in operation, reliability in clamping, time and labor saving for disassembling workpieces and high processing efficiency.
Drawings
Fig. 1 is an exploded perspective view of a self-centering fixture for inner hole machining in embodiment 1 of the present invention.
Fig. 2 is a schematic front view of the self-centering fixture for inner hole machining in embodiment 1 of the present invention.
Fig. 3 is an axial structural schematic view of the inner hole machining self-centering fixture in embodiment 1 of the present invention.
Fig. 4 is a schematic perspective view of the positioning seat in embodiment 1 of the present invention.
Fig. 5 is a schematic front view of the positioning base in embodiment 1 of the present invention.
Fig. 6 is a schematic perspective view of a connecting shaft in embodiment 2 of the present invention.
Fig. 7 is a front view schematically showing the structure of the connecting shaft in embodiment 2 of the present invention.
Fig. 8 is an axial structural view of the connecting shaft in embodiment 2 of the present invention.
The reference numerals in the figures denote:
1. a handle; 11. a step surface; 12. scale mark lines; 13. an internal cooling hole; 2. positioning the mandrel; 21. a second locking hole; 3. positioning seats; 31. avoiding a void; 32. a compaction groove; 321. pressing the bottom surface of the groove; 322. pressing the side surface of the groove; 33. a planar portion; 331. a first locking hole; 34. a second threaded hole; 35. a limiting end face; 4. briquetting; 41. a first threaded hole; 42. a compression surface; 5. a workpiece; 51. a V-shaped positioning portion; 52. a central bore; 6. mounting grooves; 61. a V-shaped positioning surface; 611. a first side positioning surface; 612. a second side positioning surface; 62. an axial positioning surface; 621. avoiding holes; 7. a locking member; 8. a fastener.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 to 5, the inner hole machining self-centering fixture of the embodiment includes a connecting shaft, a positioning seat 3 and a pressing block 4, the connecting shaft includes a handle portion 1 and a positioning core shaft 2, the handle portion 1 is used for connecting with a machine tool, the diameter of the handle portion 1 is larger than that of the positioning core shaft 2, one end of the positioning seat 3 is provided with a clearance hole 31, the other end is provided with a mounting groove 6 for mounting a workpiece 5, the mounting groove 6 includes a V-shaped positioning surface 61 capable of contacting and matching with a V-shaped positioning portion 51 of the workpiece 5, the V-shaped positioning surface 61 extends into the clearance hole 31, the positioning core shaft 2 is inserted into the clearance hole 31 and contacts and matches with the V-shaped positioning surface 61, the positioning core shaft 2 and the positioning seat 3 are locked by a locking member 7, the positioning seat 3 is provided with a pressing groove 32, the pressing groove 32 is communicated with the mounting groove 6, the pressing block 4 is arranged in the pressing, the distance between the central hole 52 of the workpiece 5 and the V-shaped locating surface 61 is equal to the distance between the locating mandrel 2 and the V-shaped locating surface 61.
During the installation, insert positioning core shaft 2 in the clearance hole 31 of positioning seat 3, make positioning core shaft 2 and V-arrangement locating surface 61 contact fit, through retaining member 7 with positioning seat 3 and 2 pretensions of positioning core shaft, place work piece 5 in mounting groove 6, V-arrangement location portion 51 of work piece 5 lower extreme and the V-arrangement locating surface 61 contact fit in the mounting groove 6, arrange briquetting 4 in the groove 32 that compresses tightly on positioning seat 3, briquetting 4 presses on work piece 5, pretension on positioning seat 3 through fastener 8, adjust the position of positioning seat 3 and work piece 5 at last, it can to tighten retaining member 7 and fastener 8, accomplish the installation of anchor clamps. Because the V-shaped positioning surface 61 is matched with the outer circular surface of the positioning mandrel 2, the radius of the outer circular surface of the positioning mandrel 2 is equal to the distance from the V-shaped positioning part 51 of the workpiece 5 to the central hole 52, so that the central hole 52 of the workpiece 5 is coaxial with the positioning mandrel 2, meanwhile, the positioning mandrel 2 is coaxial with the handle part 1, the handle part 1 is connected with a main shaft of the machine tool for executing rotary motion, namely, when the main shaft of the machine tool rotates, the central hole 52 of the workpiece 5 is always superposed with the center of the main shaft of the machine tool, the V-shaped positioning surface 61 realizes self-centering of the workpiece 5.
The inner hole processing self-centering clamp can ensure that the center hole 52 of the workpiece 5 is completely coincided with the rotation center of the main shaft, so that the center of the inner hole of a processed product can be quickly and accurately processed without aligning the inner hole (the center hole 52) of the workpiece during processing the center hole of the workpiece 5. The positioning mandrel 2 is in contact fit with the V-shaped positioning surface 61, and the workpiece 5 is in contact fit with the V-shaped positioning surface 61, namely the positioning mandrel 2 is in contact with the workpiece and the same V-shaped positioning surface 61, so that the workpiece 5 is rapidly installed and positioned with high precision, and a self-centering effect is achieved. The change of the radius of the outer circular surface of the positioning mandrel 2 adapts to the hole positioning and processing of different central hole positions of different products, and the centering device has the advantages of high centering precision, convenience in operation, reliability in clamping, time and labor saving for disassembling workpieces and high processing efficiency.
In this embodiment, the handle portion 1 has an outer circle interface, and the outer circle interface is connected with the machine tool spindle, and the outer circle interface is of a standard size. The outer round interface has the same diameter as the handle 1. The V-shaped positioning surface 61 penetrates through the clearance hole 31, that is, the axial length of the inner V-shaped positioning surface 61 of the clearance hole 31 is equal to the axial length of the clearance hole 31. In other embodiments, the outer round interface and the shank 1 may also be different diameters. V-shaped positioning surface 61 may also extend into clearance hole 31 but not penetrate clearance hole 31, i.e. axial length of inner V-shaped positioning surface 61 of clearance hole 31 is smaller than axial length of clearance hole 31.
In this embodiment, the V-shaped positioning surface 61 includes a first side positioning surface 611 and a second side positioning surface 612, a distance between the central hole 52 of the workpiece 5 and the first side positioning surface 611 is L1, a distance between the central hole 52 of the workpiece 5 and the second side positioning surface 612 is L2, L1 is L2, distances between the positioning mandrel 2 and the first side positioning surface 611 are R1, a distance between the positioning mandrel 2 and the second side positioning surface 612 is R2, and a distance between R1 is R2 is L1 is L2.
In this embodiment, the stepped surface 11 between the handle portion 1 and the positioning core shaft 2 is in contact fit with the limiting end surface 35 at the end corresponding to the positioning seat 3 to realize axial positioning. The positioning mandrel 2 is in contact fit with the V-shaped positioning surface 61 to realize radial positioning, so that the positioning accuracy of the positioning mandrel 2 and the positioning seat 3 is improved, the mounting groove 6 further comprises an axial positioning surface 62, and the workpiece 5 is abutted against the axial positioning surface 62 to improve the positioning accuracy and reliability of the workpiece 5.
In this embodiment, the axial positioning surface 62 is provided with an avoiding hole 621 axially coincident with the central hole 52 of the workpiece 5, for avoiding when machining the central hole 52. An inner cooling hole 13 penetrating through the handle part 1 and the positioning mandrel 2 is arranged in the connecting shaft, and the inner cooling hole 13 is communicated with the avoidance hole 621 to realize cooling when the workpiece 5 is machined.
In the present embodiment, the pressing groove 32 includes a pressing groove bottom 321 and two pressing groove side surfaces 322, and an included angle γ is formed between the pressing groove bottom 321 and the axis C of the connecting shaft, where γ is 0 < γ < 90 °, and preferably 30 ° < γ < 60 °, and γ is 45 ° in the present embodiment. The outer peripheral surface of the positioning seat 3 is provided with a plane part 33, the pressing groove 32 is arranged on the plane part 33, and the side surface 322 of the pressing groove is perpendicular to the plane part 33 and the axial positioning surface 62, and the three parts are intersected. The fastener 8 is a stud bolt, a first threaded hole 41 matched with the stud bolt is arranged on the pressing block 4, a second threaded hole 34 matched with the stud bolt is arranged on the positioning seat 3, and the rotating directions of the first threaded hole 41 and the second threaded hole 34 are opposite; the pressing surface 42 of the pressing block 4 contacting with the workpiece 5 is parallel to the horizontal plane. Because the included angle gamma between the bottom 321 of the pressure groove and the axis C of the connecting shaft is an acute angle, the stud bolt is arranged in an inclined manner, on one hand, the installation of the stud bolt is facilitated, and the installation reliability is improved, on the other hand, the stud bolt is enabled to have downward component force due to the inclined arrangement, so that the pressing surface 42 presses the workpiece 5, and the stability of clamping the workpiece 5 is improved. If the stud bolt is horizontal, the pressing force of the pressing surface 42 against the workpiece 5 is small. If the stud bolt is vertical, the length of the stud bolt in the positioning seat 3 is limited due to the arrangement of the clearance hole 31, so that the stud bolt is not firmly pressed, and the pressing block 4 needs to be arranged longer to press the workpiece to obtain the workpiece 5 on one side of the positioning seat 3, and if the stud bolt is arranged too long, one end, pressed by the pressing block 4, is easy to tilt. Therefore, the structure of the obliquely arranged stud bolt and the pressing block 4 not only can compress the workpiece 5, but also is compact in structure, long in arrangement without the pressing block 4, and meanwhile, enough fastening force of the stud bolt 5 can be guaranteed.
In this embodiment, the planar portion 33 of the positioning seat 3 is provided with a first locking hole 331, the positioning core shaft 2 is provided with a second locking hole 21, and the locking member 7 is disposed in the first locking hole 331 and the second locking hole 21. The locking piece 7 is a jackscrew. And a scale mark line 12 corresponding to the position of the second locking hole 21 is arranged on the stepped surface 11 between the handle part 1 and the positioning mandrel 2. When the positioning mandrel 2 is inserted into the clearance hole 31, the second locking hole 21 cannot be seen, and the position of the second locking hole 21 is determined by the scale mark lines 12, so that the first locking hole 331 is aligned with the second locking hole 21, and the jackscrew is conveniently locked.
The included angle of the V-shaped positioning surface 61 is α, the included angle of the V-shaped positioning portion 51 of the workpiece 5 is β, and α is greater than 20 degrees and smaller than 180 degrees. A further preferable range is 90 ° < α ═ β < 150 °, and in the present embodiment, α ═ β ═ 150 °.
Example 2
As shown in fig. 6 to 8, the inner hole processing self-centering fixture of the present embodiment is different from embodiment 1 in that:
in the present embodiment, the V-shaped positioning surface 61 includes a first side positioning surface 611 and a second side positioning surface 612, a distance between the central hole 52 of the workpiece 5 and the first side positioning surface 611 is L1, a distance between the central hole 52 of the workpiece 5 and the second side positioning surface 612 is L2, L1 ≠ L2, a distance between the positioning mandrel 2 and the first side positioning surface 611 is R1, a distance between the positioning mandrel 2 and the second side positioning surface 612 is R2, R1 ≠ R2, R1 ═ L1, R2 ═ L2, in order to improve the versatility of the fixture, the distance between the central hole 52 and the V-shaped positioning surface 61 is unequal, the positioning mandrel 2 is a coaxial stepped outer circular surface, the first side positioning surface 611 and the positioning mandrel 2 have a radius R1 in partial contact fit, the second side positioning surface 612 and the positioning mandrel 2 have a radius R2 in contact fit, which is equivalent to that the positioning mandrel 2 still contacts with the V-shaped positioning surface 61, the V-shaped positioning surface of the workpiece 5 is also in contact fit with the second side positioning surface 611, it is ensured that the central hole 52 of the workpiece 5 is still coaxial with the positioning spindle 2.
The rest parts which are not described are basically the same as the embodiment 1, and are not described again.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (10)

1. The utility model provides a hole processing is from centering anchor clamps which characterized in that: including connecting axle, positioning seat (3) and briquetting (4), the connecting axle is including stalk portion (1) and the positioning core axle (2) of coaxial setting, stalk portion (1) is used for being connected with the lathe and stalk portion (1) diameter is greater than positioning core axle (2) diameter, positioning seat (3) one end is equipped with keeps away hole (31), and the other end is equipped with mounting groove (6) that are used for installing work piece (5), mounting groove (6) are including V-arrangement locating surface (61) that can contact the complex with V-arrangement locating portion (51) of work piece (5), V-arrangement locating surface (61) extend to in keeping away hole (31), positioning core axle (2) are worn to locate in keeping away hole (31) and are contacted with V-arrangement locating surface (61) and cooperate, positioning core axle (2) and positioning seat (3) are locked through retaining member (7), be equipped with on positioning seat (3) and compress tightly groove (32), the pressing groove (32) is communicated with the mounting groove (6), the pressing block (4) is arranged in the pressing groove (32) and used for pressing the workpiece (5) in the mounting groove (6), the pressing block (4) is locked on the positioning seat (3) through a fastening piece (8), and the distance between the central hole (52) of the workpiece (5) and the V-shaped positioning surface (61) is equal to the distance between the positioning core shaft (2) and the V-shaped positioning surface (61).
2. The internal bore machining self-centering clamp of claim 1, wherein: the V-shaped positioning surface (61) comprises a first side positioning surface (611) and a second side positioning surface (612), the distance between the central hole (52) of the workpiece (5) and the first side positioning surface (611) is L1, the distance between the central hole (52) of the workpiece (5) and the second side positioning surface (612) is L2, L1 is L2, the distances between the positioning mandrel (2) and the first side positioning surface (611) are R1 respectively, the distance between the positioning mandrel (2) and the second side positioning surface (612) is R2, and R1 is R2 is L1L 2.
3. The internal bore machining self-centering clamp of claim 1, wherein: the V-shaped positioning surface (61) comprises a first side positioning surface (611) and a second side positioning surface (612), the distance between a central hole (52) of the workpiece (5) and the first side positioning surface (611) is L1, the distance between the central hole (52) of the workpiece (5) and the second side positioning surface (612) is L2, L1 is not equal to L2, the distances between the positioning mandrel (2) and the first side positioning surface (611) are R1 respectively, the distance between the positioning mandrel (2) and the second side positioning surface (612) is R2, R1 is not equal to R2, R1 is L1, and R2 is L2.
4. An internal bore machining self-centering clamp according to any one of claims 1 to 3, wherein: the mounting groove (6) further comprises an axial positioning surface (62), the workpiece (5) abuts against the axial positioning surface (62), and the axial positioning surface (62) is provided with an avoidance hole (621) which is axially overlapped with the central hole (52) of the workpiece (5); an inner cooling hole (13) penetrating through the handle part (1) and the positioning mandrel (2) is formed in the connecting shaft, and the inner cooling hole (13) is communicated with the avoiding hole (621).
5. The internal bore machining self-centering clamp of claim 4, wherein: the pressing groove (32) comprises a pressing groove bottom surface (321) and two pressing groove side surfaces (322), an included angle gamma is formed between the pressing groove bottom surface (321) and an axis C of the connecting shaft, and the gamma is more than 0 and less than 90 degrees.
6. The internal bore machining self-centering clamp of claim 5, wherein: the positioning seat is characterized in that a plane part (33) is arranged on the upper peripheral surface of the positioning seat (3), the pressing groove (32) is arranged on the plane part (33), the side surface (322) of the pressing groove is perpendicular to the plane part (33) and the axial positioning surface (62), and the three parts are intersected.
7. The internal bore machining self-centering clamp of claim 6, wherein: plane portion (33) are equipped with first locking hole (331), be equipped with second locking hole (21) on positioning core axle (2), retaining member (7) are located in first locking hole (331) and second locking hole (21).
8. The internal bore machining self-centering clamp of claim 7, wherein: and scale mark lines (12) corresponding to the positions of the second locking holes (21) are arranged on the stepped surface (11) between the handle part (1) and the positioning mandrel (2).
9. An internal bore machining self-centering clamp according to any one of claims 1 to 3, wherein: the included angle of the V-shaped positioning surface (61) is alpha, the included angle of the V-shaped positioning part (51) of the workpiece (5) is beta, and alpha is more than 20 degrees and less than 180 degrees.
10. An internal bore machining self-centering clamp according to any one of claims 1 to 3, wherein: the fastening piece (8) is a stud bolt, a first threaded hole (41) matched with the stud bolt is formed in the pressing block (4), a second threaded hole (34) matched with the stud bolt is formed in the positioning seat (3), and the rotating directions of the first threaded hole (41) and the second threaded hole (34) are opposite; and a pressing surface (42) of the pressing block (4) contacted with the workpiece (5) is parallel to the horizontal plane.
CN202011362869.2A 2020-11-27 2020-11-27 Self-centering clamp for inner hole machining Pending CN112497065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011362869.2A CN112497065A (en) 2020-11-27 2020-11-27 Self-centering clamp for inner hole machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011362869.2A CN112497065A (en) 2020-11-27 2020-11-27 Self-centering clamp for inner hole machining

Publications (1)

Publication Number Publication Date
CN112497065A true CN112497065A (en) 2021-03-16

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ID=74967103

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011362869.2A Pending CN112497065A (en) 2020-11-27 2020-11-27 Self-centering clamp for inner hole machining

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CN (1) CN112497065A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09314464A (en) * 1996-05-31 1997-12-09 Ntn Corp Chucking device of trunnion in tri-port joint
KR20010057606A (en) * 1999-12-23 2001-07-05 이구택 Turning base device of bloom grinder machine
CN102335772A (en) * 2011-09-30 2012-02-01 哈尔滨建成集团有限公司 Special through-hole drilling fixture for cylindrical part
CN202317704U (en) * 2011-10-25 2012-07-11 陈希林 Pressing device
CN104476246A (en) * 2014-11-16 2015-04-01 重庆鼎汉机械有限公司 Rapid center drilling fixture
CN205147807U (en) * 2015-12-10 2016-04-13 浙江万盾制冷配件有限公司 From centering shaft class work piece centre bore machine tool
CN206436130U (en) * 2017-01-18 2017-08-25 常州星宇车灯股份有限公司 Inner polygon spanner grinds clamping tool
CN206998376U (en) * 2017-04-12 2018-02-13 苏州群志机械设备有限公司 A kind of lathe positioning fixture
CN111375804A (en) * 2018-12-30 2020-07-07 天津宝涞精工集团股份有限公司 Clamping equipment mounted on four-axis machining center

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09314464A (en) * 1996-05-31 1997-12-09 Ntn Corp Chucking device of trunnion in tri-port joint
KR20010057606A (en) * 1999-12-23 2001-07-05 이구택 Turning base device of bloom grinder machine
CN102335772A (en) * 2011-09-30 2012-02-01 哈尔滨建成集团有限公司 Special through-hole drilling fixture for cylindrical part
CN202317704U (en) * 2011-10-25 2012-07-11 陈希林 Pressing device
CN104476246A (en) * 2014-11-16 2015-04-01 重庆鼎汉机械有限公司 Rapid center drilling fixture
CN205147807U (en) * 2015-12-10 2016-04-13 浙江万盾制冷配件有限公司 From centering shaft class work piece centre bore machine tool
CN206436130U (en) * 2017-01-18 2017-08-25 常州星宇车灯股份有限公司 Inner polygon spanner grinds clamping tool
CN206998376U (en) * 2017-04-12 2018-02-13 苏州群志机械设备有限公司 A kind of lathe positioning fixture
CN111375804A (en) * 2018-12-30 2020-07-07 天津宝涞精工集团股份有限公司 Clamping equipment mounted on four-axis machining center

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