WO2019174488A1 - 加工工具的组接中心定位结构 - Google Patents

加工工具的组接中心定位结构 Download PDF

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Publication number
WO2019174488A1
WO2019174488A1 PCT/CN2019/076867 CN2019076867W WO2019174488A1 WO 2019174488 A1 WO2019174488 A1 WO 2019174488A1 CN 2019076867 W CN2019076867 W CN 2019076867W WO 2019174488 A1 WO2019174488 A1 WO 2019174488A1
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WO
WIPO (PCT)
Prior art keywords
processing
clamping handle
hole
head
processing head
Prior art date
Application number
PCT/CN2019/076867
Other languages
English (en)
French (fr)
Inventor
陈立诚
Original Assignee
益壮企业有限公司
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 益壮企业有限公司 filed Critical 益壮企业有限公司
Priority to US16/979,282 priority Critical patent/US11453067B2/en
Priority to KR1020207029188A priority patent/KR102332216B1/ko
Priority to JP2020549028A priority patent/JP7224364B2/ja
Priority to RU2020131841A priority patent/RU2749504C1/ru
Priority to CA3095794A priority patent/CA3095794C/en
Publication of WO2019174488A1 publication Critical patent/WO2019174488A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B23B29/12—Special arrangements on tool holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/11—Retention by threaded connection
    • B23B31/1107—Retention by threaded connection for conical parts
    • B23B31/1122—Retention by threaded connection for conical parts using cylindrical threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/006—Conical shanks of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/008—Chucks; Expansion mandrels; Adaptations thereof for remote control with arrangements for transmitting torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/0204—Connection of shanks to working elements of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/0208—Bores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/02—Connections between the shanks and detachable cutting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2240/00—Details of connections of tools or workpieces
    • B23C2240/24—Connections using screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2265/00—Details of general geometric configurations
    • B23C2265/08—Conical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2265/00—Details of general geometric configurations
    • B23C2265/12—Eccentric

Definitions

  • the present invention relates to a processing tool, and more particularly to an assembly center positioning structure for assembly and bonding positioning of a processing head.
  • machining it is common to use a machine tool to drive a tool to machine a workpiece.
  • the tool can be static or rotary, such as a milling cutter, drill, turning tool, or punch... to cut, cut, or Stamping forming.
  • the prior art processing tool can be referred to the U.S. Patent No. 4,834,597, the Chinese Patent No. 101,155, 655, the Patent Application No. 107, 457, 440, and the Chinese Patent No. 201742700.
  • the patent application of "Processing Tool Assembly Structure" of Taiwan No. 201742700 which mainly includes a grip handle, a processing head, and a fixing member. The machining head is mounted to the clamping shank by a fastening member.
  • the end surface of one end of the clamping handle is formed with a receiving groove
  • the inner peripheral wall of the receiving groove is formed with a plurality of curved surfaces having the same radius of curvature and different positions of the center of curvature
  • the processing head has a clamping handle a protruding assembly portion that can be embedded in the receiving groove of the clamping handle.
  • the outer peripheral wall of the assembly portion is also formed with a plurality of curved surfaces having the same radius of curvature and different positions of the center of curvature.
  • the positions of the respective arc surfaces are easy. There are errors.
  • the position of the non-cylindrical element 47 in the tool has a large error, so that the installation may not be performed smoothly, but may be stuck at the opening of the hole. .
  • the size of the member 47 is bound to be slightly larger than the space 33, so that there is a gap between the assembled member 47 and the wall surface of the space 33.
  • a primary object of the present invention is to provide an assembly structure for a processing tool that can assist in the precise positioning of the processing tool during assembly so that the axis of the processing tool can be maintained in a straight line after assembly.
  • the assembly structure of the processing tool proposed by the present invention has:
  • the clamping handle has a receiving groove; the receiving groove is located at an end surface of one end of the clamping handle, and is formed with:
  • the recess includes a plurality of curved surfaces, the curved surfaces of the concave portions have the same radius of curvature and the center of curvature is not at the same point;
  • the central positioning hole wall surface is a circular straight surface; relative to the concave portion, the central positioning hole is further away from the opening of the receiving groove; the wall surface of the concave portion is tapered toward the central positioning hole to form a cone Noodle
  • a processing head having:
  • An assembly portion that can be received in the receiving groove of the clamping handle, the connecting portion is fixed to the processing portion, and is formed with:
  • the convex portion matching the concave portion and accommodating the concave portion, the convex portion comprising a plurality of curved surfaces, the number of the curved surfaces of the convex portion being equal to the number of the curved surfaces of the concave portion;
  • the curved faces of the head have the same radius of curvature and the centers of curvature are not at the same point;
  • a central positioning post adapted to be disposed in the central positioning hole, the wall of the central positioning post is also a circular straight surface; the central positioning post is further away from the convex portion a processing portion; the wall surface of the convex portion is tapered toward the central positioning post to form a tapered surface;
  • a fixing member capable of connecting and fixing the clamping handle and the processing head
  • each of the curved surfaces of the convex portion abuts against one of the curved surfaces of the concave portion, and the wall surface of the central positioning post abuts against the center
  • the inner circumferential surface of the hole is positioned, and the central axis of rotation of the clamping handle is in line with the central axis of rotation of the machining head.
  • the invention has the advantages that the concave portion and the central positioning hole are disposed in the accommodating groove of the clamping handle, and the convex portion corresponding to the concave portion and the central positioning column corresponding to the central positioning hole are disposed on the assembly portion of the processing head
  • the assembly portion of the machining head is inserted into the receiving groove of the clamping handle in two stages.
  • the rotation axis of the machining head and the rotation axis of the clamping shank can be aligned on the line, and the machining head can be rotated to the correct angle and then fitted to the clamping shank.
  • the machining head can be tightly fixed on the clamping shank without any inclination in any direction or angle, and the machining head is not loosened due to excessive vibration during the machining of the workpiece, and the fitting can not be surely fitted.
  • the wall surface of the recess is tapered toward the central positioning hole to form a tapered surface
  • the wall surface of the convex portion is tapered toward the central positioning post to form a tapered surface, whether the concave portion or the convex portion is manufactured at the time of manufacture.
  • the processing head can still be mounted on the clamping handle smoothly, and can be installed without being affected by the error.
  • the curved surface can still be abutted to make the processing head and the clamping handle. It won't be wrong, just like there is no error.
  • the receiving groove of the clamping handle further has a class surface, the class surface of the receiving groove is located between the concave portion and the central positioning hole;
  • the set of joints of the processing head also has a class surface, the class surface of the joint portion is located between the convex portion and the central positioning column; the thickness of the convex portion along the central axis of rotation is smaller than the central axis of the concave portion along the rotation center.
  • the depth of the direction, the class face of the gripping handle is opposite the class face of the machining head, and a gap is formed between the class face of the gripping handle and the class face of the machining head.
  • the processing head further has a connecting portion, the connecting portion is located between the processing portion and the connecting portion, and the connecting portion is fixed by the connecting portion
  • the cross-sectional shape and size of the connecting portion are the same as the cross-sectional shape and size of the grip.
  • the clamping handle is also formed with a consistent perforation, the through hole axially extending through the central axis of rotation of the clamping handle;
  • the processing head is further formed with a recess formed on a side of the processing head facing the clamping handle, and facing and communicating with the through hole of the clamping handle;
  • the fixing member is threaded and screwed into the through hole and the groove.
  • the clamping handle is further formed with a groove formed on a side of the clamping handle facing the processing head;
  • the processing head is further formed with a continuous through hole extending axially through the central axis of rotation of the processing head and facing and communicating with the groove of the clamping handle;
  • the fixing member is threaded and screwed into the through hole and the groove.
  • Fig. 1 is an exploded perspective view showing a first embodiment of the present invention.
  • Figure 2 is an exploded cross-sectional view showing a first embodiment of the present invention.
  • Fig. 3 is a cross-sectional view showing the assembly in the first embodiment of the present invention without error.
  • Figure 4 is a cross-sectional view of the first embodiment of the present invention assembled in the presence of an error.
  • Figure 5 is a cross-sectional view taken along line A-A of the first embodiment of the present invention in the case of an error.
  • Fig. 6A is a plan view showing one aspect of the processing head of the first embodiment of the present invention.
  • Figure 6B is a cross-sectional view showing one aspect of the processing head of the first embodiment of the present invention.
  • Fig. 7A is a plan view showing another aspect of the machining head according to the first embodiment of the present invention.
  • Figure 7B is a cross-sectional view showing another aspect of the processing head of the first embodiment of the present invention.
  • Figure 8 is an exploded cross-sectional view showing a second embodiment of the present invention.
  • FIG. 9 is a schematic view showing a skew when the processing head is assembled to the grip handle in the prior art.
  • Figure 10 is a schematic view of the prior art in which the machining head cannot be assembled to the gripping handle due to an error.
  • FIG. 1 and FIG. 2 is a first embodiment of the present invention.
  • the invention provides a assembling structure of a processing tool, which has a clamping handle 10, a processing head 20, and a fixing member 30.
  • the gripping handle 10 has a receiving groove 100 and is selectively formed with a consistent perforation 14.
  • the receiving groove 100 is located at an end surface of one end of the clamping handle 10, and is formed with a recess 11 and a central positioning hole 12, and is selectively formed with a level surface 13.
  • the recess 11 is adjacent to an opening of the receiving groove 100.
  • the inner edge of the end surface of the grip handle 10 is adjacent to the recess 11.
  • the concave portion 11 includes a plurality of curved surfaces having the same radius of curvature and the centers of curvature not at the same point, and each of the curved surfaces has the same arc length and surrounds the equally divided concave portion 11.
  • the center positioning hole 12 is further away from the opening of the receiving groove 100.
  • the cross-sectional shape of the center positioning hole 12 is a circle.
  • the wall surface of the recess 11 is tapered toward the center positioning hole 12 to form a tapered surface.
  • the cross-sections of the central positioning holes 12 are all the same in size, so that the wall surface of the central positioning hole 12 is a circular straight surface.
  • the through hole 14 penetrates the central axis of the shank 10 in the axial direction, and one end of the through hole 14 communicates with the accommodating groove 100.
  • the processing head 20 has a processing portion 21 and a plurality of connecting portions 22, and selectively has a connecting portion 23 and a recess 24.
  • the processing portion 21 can process a workpiece; in other words, the processing portion 21 can be a blade portion of the processing head 20.
  • the assembly portion 22 is fixed to the processing portion 21 and can be received in the receiving groove 100 of the clamping handle 10 .
  • the assembly portion 22 of the machining head 20 does not abut against the level surface 13.
  • the processing head 20 is assisted to be fixed to the gripping handle 10 at the correct angle.
  • the central axis of rotation of the shank 10 is in line with the central axis of rotation of the processing head 20.
  • the assembly portion 22 has a convex portion 221 and a central positioning post 222, and selectively has a class surface 223.
  • the convex portion 221 is matched with the concave portion 11, and the central positioning post 222 is matched with the central positioning hole 12. Therefore, the convex portion 221 may also include a plurality of curved surfaces, and the number of curved surfaces of the convex portion 221 is equal to the number of curved surfaces of the concave portion 11.
  • the curved faces of the convex portions 221 have the same radius of curvature and the centers of curvature are not at the same point.
  • the center positioning post 222 is further away from the processing portion 21 with respect to the convex portion 221.
  • the wall surface of the convex portion 221 is tapered toward the central positioning post 222 to form a tapered surface; corresponding to the central positioning hole 12, the wall surface of the central positioning post 222 is also a Round straight face.
  • the level surface 223 of the assembly portion 22 is located between the convex portion 221 and the central positioning post 222, and corresponds to and faces the level surface 13 of the gripping shank 10, which is located between the concave portion 11 and the central positioning hole 12.
  • the thickness of the convex portion 221 in the direction of the central axis of rotation is smaller than the depth of the concave portion 11 in the direction of the central axis of rotation.
  • the level surface 13 of the gripping shank 10 faces the level surface 223 of the processing head 20, and a gap is formed between the level surface 13 of the gripping shank 10 and the level surface 223 of the processing head.
  • the projection 221 can be fully inserted into the recess 11 so that the gripping shank 10 can be surely engaged with the processing head 20.
  • each surface of the clamping handle 10 and the processing head 20 is located at a target position. Therefore, in the assembled portion 22, the outer wall surface of the central positioning post 222 can be completely fitted to The inner wall surface of the central positioning hole 12 is located, and the respective curved surfaces of the convex portion 221 can also be completely attached to the respective curved surfaces of the concave portion 11.
  • the axes of the clamping shank 10, the recess 11 and the central positioning hole 12 are exactly on the same axis X, and the axes of the machining head 20 and the central positioning post 222 are also on the same axis X.
  • the axis of the convex portion 221 is not offset on the axis X but on the axis Y.
  • the concave portion 11 and the convex portion 221 are tapered tapered surfaces, and the degree of deviation of the axial center of the concave portion 11 and the convex portion 221 (that is, the distance between the axis X and the axis Y) only affects the extent to which the convex portion 221 penetrates the concave portion 11.
  • the curved surface of the convex portion 221 can still abut against the curved surface of the concave portion 11, so that the gripping handle 10 can still drive the processing head 20.
  • the convex portion 221 may have three curved surfaces, and the joints between the curved surfaces are rounded, so that the curved surfaces extend by 120 degrees corresponding to the central axis of the processing head 20, and the clamping handle The recesses need to match (not shown).
  • 7A and 7B which is another aspect of the processing head 20 according to the first embodiment of the present invention, the convex portion 221 may have four curved surfaces, and thus each curved surface corresponds to the central axis of the processing head 20. Extending the angle of 90 degrees, the recesses of the grip handles need to match (not shown).
  • the shape of the convex portion 221 and the concave portion is not limited thereto.
  • the connecting portion 23 is located between the processing portion 21 and the connecting portion 22, and the connecting portion 22 is fixed to the processing portion 21 by the connecting portion 23.
  • the processing portion 21, the connecting portion 22, and the connecting portion 23 are One piece is formed.
  • the cross-sectional shape and size of the connecting portion 23 are the same as the cross-sectional shape and size of the grip handle 10. Therefore, after assembly, the side surface of the connecting portion 23 is formed with the end surface of the accommodating groove 100, and the outer wall surface of the connecting portion 23 is connected to the outer wall surface of the shank 10 to form a cylindrical surface. Through the connecting portion 23, the processing portion 21 can be moved away from the gripping handle 10 to reduce the chance of damage to the gripping handle 10.
  • the recess 24 is recessed in the side of the machining head 20 facing the gripping shank 10, in other words, the recess 24 is formed on the nip 22. Further, the recess 24 is recessed in the central axis of the machining head 20, so that the recess 24 faces and communicates with the through hole 14 of the gripping shank 10.
  • the inner wall of the recess 24 may be formed with a thread.
  • the fixing member 30 can connect and fix the clamping handle 10 and the processing head 20.
  • the fixing member 30 is placed in the through hole 14 of the gripping handle 10 from the end of the gripping handle 10 away from the processing head 20, and the fixing member 30 is screwed to the thread of the inner wall of the through hole 14.
  • a part of the fixing member 30 extends into the accommodating groove 100 of the shank 10 so as to extend into the groove 24 of the processing head 20 to be screwed to the thread of the inner wall of the groove 24.
  • the grip handle 10 and the machining head 20 can be connected and fixed.
  • the assembly portion 22 of the machining head 20 is first inserted into the accommodating groove 100 of the clamp shank 10.
  • the center positioning post 222 of the assembly portion 22 first extends into the center positioning hole 12 of the accommodating groove 100. Since the center positioning hole 12 is farther away from the opening of the receiving groove 100, when the center positioning post 222 protrudes into and abuts against the center positioning hole 12, the rotation center axis of the processing head 20 can be aligned with the rotation center axis of the clamping handle 10.
  • the two central axes of rotation are each on the other side of the line.
  • the central positioning post 222 abutting against the central positioning hole 12, the central axis of rotation of the machining head 20 can be prevented from being skewed with the central axis of rotation of the gripping handle 10 when assembled.
  • the central positioning post 222 and the central positioning hole 12 have a circular cross section, so that the machining head 20 can be placed in the gripping handle 10 at an arbitrary direction.
  • the convex portion 221 can protrude into and abut against the concave portion 11.
  • the cross section of the convex portion 221 and the concave portion 11 is not circular, and the thickness of the convex portion 221 in the direction of the central axis of rotation is smaller than the depth of the concave portion 11 in the direction of the central axis of rotation, and the processing head 20 can be rotated by the rotation center axis as a rotation axis.
  • the correct position extends into the recess 11 so that the machining head 20 can be secured to the gripping shank 10 at the correct angle.
  • both the concave portion 11 and the convex portion 221 are tapered. During the assembly process, when the convex portion 221 is inserted into and abuts against the concave portion 11, even if the angle of rotation of the processing head 20 on the central axis of rotation is slightly wrong, The convex portion 221 can still be rotated to the correct angle while entering along the tapered concave portion 11, and thus is more convenient in assembly.
  • the processing head 20 is fixed to the gripping handle 10 by the fixing member 30.
  • the technical features are similar to those of the first embodiment, except that the gripping shank 10A does not have a through hole but has a groove 14A, and the processing head 20A does not have a groove but has Through hole 24A.
  • the through hole and the groove on the chuck and the processing head are oppositely disposed to be the second embodiment.
  • the recess 14A is recessed in the side of the gripping handle 10A facing the processing head 20A, and is located in the accommodating recess 100 and extends inward along the center of the gripping shank 10A.
  • the through hole 24A penetrates the central axis of the machining head 20A in the axial direction, and the inner wall may be formed with a thread. Therefore, when the machining head 20A is connected and fixed to the shank 10A, the fixing member 30 is placed in the through hole 24A of the machining head 20A from the side of the machining head 20A away from the shank 10A, and is fixed. A portion of the member 30 extends into the recess 14A of the gripping shank 10A, whereby the retaining member 30 can be screwed to the gripping shank 10A and the processing head 20A at the same time.
  • the present invention provides recesses 11 and central positioning holes 12 of different sizes in the receiving groove 100 of the gripping handle 10, and a convex portion corresponding to the recess 11 is provided on the assembling portion 22 of the processing head 20.
  • the portion 221 and the central positioning post 222 corresponding to the central positioning hole 12 penetrate the assembly portion 22 of the machining head 20 into the receiving groove 100 of the clamping handle 10 in two stages when assembling the clamping handle 10 and the machining head 20. .
  • the rotation axis of the machining head 20 and the rotation axis of the clamping shank 10 can be aligned, and the machining head 20 can be rotated to the correct angle before being fitted into the clamp. Hold the handle 10 on it.
  • the processing head 20 can be tightly fixed to the gripping shank 10 without any inclination in any direction or angle, so that it is not loosened by excessive vibration during processing.
  • a tapered surface is formed by the wall surface of the recess 11 toward the center positioning hole 12, and the wall surface of the convex portion 221 is tapered toward the center positioning post 222 to form a tapered surface, whether it is the recess 11 or the convex portion 221 Any one of the errors in manufacturing, the processing head 20 can still be smoothly mounted on the clamping shank, can be installed without being affected by the error, and the arc surface can still remain abutting when the forward rotation and the reverse rotation are alternated. The processing head 20 and the gripping handle 10 are not displaced as if there were no errors.

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  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Milling Processes (AREA)

Abstract

一种加工工具的组接中心定位结构，其具有一夹持柄(10)、一加工头(20)、及一连接固定夹持柄(10)及加工头(20)的固接件(30)。夹持柄(10)的端面容置槽(100)形成有一凹部(11)及一中心定位孔(12)。加工头(20)形成有一凸部(221)及一中心定位柱(222)，凸部(221)与凹部(11)相匹配，且中心定位柱(222)与中心定位孔(12)相匹配。因此，于组接后能确保夹持柄(10)的转动中心轴与加工头(20)的转动中心轴呈一直线。

Description

加工工具的组接中心定位结构 技术领域
本发明涉及一种加工工具，特别是涉及一种关于加工头的组装和结合定位的组接中心定位结构。
背景技术
在机械加工中，常见以工具机驱动刀具来对工件进行加工，刀具可以是静止型或转动型，如铣刀、钻头、车刀、或冲头…等加工工具来对工件进行切削、切割或冲压成形。
现有技术的加工工具可参照美国第4,834,597号专利案、中国第101155655号专利案及第107457440号专利申请案、及中国台湾第201742700号专利申请案。以中国台湾第201742700号“加工工具的组接结构”专利申请案为例，其主要包括一夹持柄、一加工头、以及一固接件。该加工头是通过固接件安装于该夹持柄上。具体而言，该夹持柄的一端的端面形成有一容置槽，该容置槽的内周壁形成有多个曲率半径相同且曲率圆心位置不同的弧面，而该加工头具有一向夹持柄凸出的组接部，该组接部恰能嵌设于该夹持柄的容置槽内。换句话说，相应于该容置槽的内周壁，该组接部的外周壁也形成有多个曲率半径相同且曲率圆心位置不同的弧面。
由此，于刀具长久使用后磨损后，虽可仅更换损害部分，以避免浪费资源及可节省成本，然而组装具有前述组接结构的加工工具时，常因组装时的疏失或制造时的误差让该加工头的轴心与该夹持柄的轴心无法呈一直线，如图9所示，因此在加工时将影响工件的预定品质，且若轴心偏斜的严重时还可能造成加工工具的损坏，故组装时使该加工头91的轴心与该夹持柄92的轴心位于一轴线上为非常重要课题。
另一方面，如图10所示，在制造、加工时无法避免地会有误差，使得各部分的尺寸或位置难免会偏离理论值，且若偏离的程度过大便可能造成加工工具使用时所造出的物品也有明显误差，甚至可能造成刀具无法组装于机床的夹持柄上。对现有技术而言，对于圆柱体93的加工精密度极高，虽不可避免地有些许误差，但误差不足以对组装或 是使用产生影响。然而，对于非圆柱体94的加工中，精密度明显较差，例如在制造前述具有多个曲率半径相同且曲率圆心位置不同的弧面的内周壁及外周壁时，各弧面的位置便容易有误差。如美国第2008/0166198号专利申请案所示的加工工具中，刀具中非圆柱体的元件47的位置的误差较大，因此可能无法顺利地进行安装，而是卡在穿设孔的开口处。另一方面，为了让柱状的元件47能放入空间33中，元件47的尺寸势必会略大于空间33，因此组装后元件47与空间33的壁面间会存在间隙。当元件47与空间33的壁面存在间隙，加工工具于正转与反转交替时，元件47与夹持柄便会发生错动，连带地造成固定螺丝松脱。
有鉴于此，提出一种更佳的改善方案，其为此业界亟待解决的问题。
发明内容
本发明的主要目的在于，提出一种加工工具的组接结构，其能辅助加工工具于组装时精确定位，使得组装完成后加工工具的轴心能维持于一直线上。
为达上述目的，本发明所提出的加工工具的组接结构具有：
一夹持柄，该夹持柄具有一容置槽；该容置槽位于该夹持柄一端的端面，并形成有：
一凹部，该凹部邻接该容置槽的一开口；该凹部包含多个弧面，该凹部的所述弧面的曲率半径相同且曲率中心不在同一点；及
一中心定位孔，该中心定位孔壁面为一圆形直筒面；相对于该凹部，该中心定位孔更远离该容置槽的该开口；该凹部的壁面朝该中心定位孔渐缩形成一锥状面；
一加工头，该加工头具有：
一能对工件加工的加工部；及
一能容置于该夹持柄的该容置槽内的组接部，该组接部固设于该加工部，并形成有：
一与该凹部相匹配而能容置于该凹部内的凸部，该凸部包含多个弧面，该凸部的所述弧面的数量等于该凹部的所述弧面的数量； 该加工头的所述弧面的曲率半径相同且曲率中心不在同一点；及
一与该中心定位孔相匹配而能容置于该中心定位孔内的中心定位柱，该中心定位柱的壁面亦为一圆形直筒面；相对于该凸部，该中心定位柱更远离该加工部；该凸部的壁面朝该中心定位柱渐缩也形成一锥状面；以及
一能连接固定该夹持柄及该加工头的固接件；
其中，当该组接部容置于该容置槽时，该凸部的各个弧面分别抵靠贴合于该凹部的其中一弧面，该中心定位柱的壁面抵靠贴合于该中心定位孔的内周面，且该夹持柄的转动中心轴与该加工头的转动中心轴呈一直线。
本发明的优点在于，通过于夹持柄的容置槽内设置了凹部及中心定位孔，以及加工头的组接部上设置了对应于凹部的凸部及对应于中心定位孔的中心定位柱，于组装夹持柄与加工头时是两阶段地将加工头的组接部穿入夹持柄的容置槽。且通过此两阶段穿入的过程，能使加工头的转动轴心与夹持柄的转动轴心于一直线上，且能使加工头转至正确的角度后嵌合于夹持柄上。因此，加工头能紧密地固设于夹持柄上且不会有任何方向或角度上的歪斜，在对工件加工过程中也不会因过度的震动，使加工头打滑松脱无法确实嵌合于夹持柄上。另一方面，通过凹部的壁面朝中心定位孔渐缩形成一锥状面，以及凸部的壁面朝中心定位柱渐缩也形成一锥状面，无论是凹部或凸部任何一者于制造时有所误差，加工头仍能顺利地安装于夹持柄上，能不受误差的影响地安装，且于正转与反转交替时弧面仍能保持抵靠而使加工头与夹持柄不会错动，就像是没有误差一般。
如前所述的加工工具的组接中心定位结构中，该夹持柄的该容置槽还具有一阶级面，该容置槽的该阶级面位于该凹部及该中心定位孔之间；该加工头的该组接部也具有一阶级面，该组接部的该阶级面位于该凸部及该中心定位柱之间；该凸部沿转动中心轴方向的厚度小于该凹部沿转动中心轴方向的深度，该夹持柄的该阶级面与该加工头的该阶级面相正对，且该夹持柄的该阶级面与该加工头的该阶级面之间形成一间隙。
如前所述的加工工具的组接中心定位结构中，该加工头还具有一 连接部，该连接部位于该加工部与该组接部之间，且该组接部通过该连接部固设于该加工部；该连接部的截面形状及大小与该夹持柄的截面形状及大小相同。
如前所述的加工工具的组接中心定位结构中：
该夹持柄还形成有一贯穿孔，该贯穿孔轴向贯穿该夹持柄的转动中心轴；
该加工头还形成有一凹槽，该凹槽凹陷形成于该加工头朝向该夹持柄的一侧，且正对并连通于该夹持柄的该贯穿孔；且
该固接件穿设并螺合于该贯穿孔及凹槽内。
如前所述的加工工具的组接中心定位结构中：
该夹持柄还形成有一凹槽，该凹槽凹陷形成于该夹持柄朝向该加工头的一侧；
该加工头还形成有一贯穿孔，该贯穿孔轴向贯穿该加工头的转动中心轴，且正对并连通于该夹持柄的该凹槽；且
该固接件穿设并螺合于该贯穿孔及凹槽内。
附图说明
图1为本发明第一实施例的分解后的立体图。
图2为本发明第一实施例的分解后的剖面图。
图3为本发明第一实施例中，无误差时组装后的剖面图。
图4为本发明第一实施例中，有误差时组装后的剖面图。
图5为本发明第一实施例中，有误差时组装后在剖切线A-A的剖面图。
图6A为本发明第一实施例的加工头的其中一态样的俯视图。
图6B为本发明第一实施例的加工头的其中一态样的剖视图。
图7A为本发明第一实施例的加工头的另一态样的俯视图。
图7B为本发明第一实施例的加工头的另一态样的剖视图。
图8为本发明第二实施例的分解后的剖面图。
图9为现有技术中加工头组装于夹持柄时发生歪斜的示意图。
图10为现有技术中因误差导致加工头无法组装于夹持柄的示意图。
附图标记说明：
10夹持柄            100容置槽
11凹部              12中心定位孔
13阶级面            14贯穿孔
20加工头            21加工部
22组接部            221凸部
222中心定位柱       223阶级面
23连接部            24凹槽
30固接件
10A夹持柄           14A凹槽
20A加工头           24A贯穿孔
X轴线               Y轴线。
具体实施方式
以下配合附图及本发明的较佳实施例，进一步阐述本发明为达成预定发明目的所采取的技术手段。
请参考图1及图2，其为本发明的第一实施例。本发明提出一种加工工具的组接结构，其具有一夹持柄10、一加工头20、及一固接件30。
夹持柄10具有一容置槽100，并选择性地形成有一贯穿孔14。容置槽100位于夹持柄10一端的端面，并形成有一凹部11及一中心定位孔12，且选择性地形成有一阶级面13。凹部11邻接于容置槽100的一开口。具体而言，夹持柄10该端面的内缘与凹部11邻接。凹部11包含多个弧面，其曲率半径相同且曲率中心不在同一点，且各弧面的弧长相同而环绕均分凹部11。
而相对于凹部11，中心定位孔12更远离容置槽100的开口。中心定位孔12的截面形状为圆形。本实施例中，凹部11的壁面朝中心定位孔12渐缩而形成一锥状面。中心定位孔12上各截面大小皆相同，因此中心定位孔12的壁面为一圆形直筒面。
贯穿孔14沿轴向贯穿夹持柄10的中心轴，贯穿孔14的一端连通于容置槽100。
加工头20具有一加工部21及一组接部22，且选择性地具有一连 接部23及一凹槽24。加工部21能对一工件加工；换句话说，加工部21可为加工头20的刀刃部。组接部22固设于加工部21，且能容置于夹持柄10的容置槽100。加工头20的组接部22不抵靠于该阶级面13。通过将组接部22容置于夹持柄10的容置槽100内，帮助使加工头20以正确的角度固设于夹持柄10。当组接部22容置于容置槽100时，夹持柄10的转动中心轴与加工头20的转动中心轴呈一直线。
具体而言，组接部22具有一凸部221及一中心定位柱222，且选择性地具有一阶级面223。凸部221与凹部11相匹配，而中心定位柱222与中心定位孔12相匹配。因此，凸部221同样可包含多个弧面，凸部221的弧面的数量等于凹部11的弧面的数量。凸部221各弧面的曲率半径相同且曲率中心不在同一点。相对于凸部221，中心定位柱222更远离加工部21。本实施例中，对应于凹部11的锥状面，而凸部221的壁面朝中心定位柱222渐缩也形成一锥状面；对应于中心定位孔12，中心定位柱222的壁面亦为一圆形直筒面。组接部22的阶级面223位于凸部221及中心定位柱222之间，且对应并正对于夹持柄10的阶级面13，阶级面13其位于凹部11及中心定位孔12之间。凸部221沿转动中心轴方向的厚度小于凹部11沿转动中心轴方向的深度。因此，于组接状态时，夹持柄10的阶级面13与加工头20的阶级面223相正对，且夹持柄10的阶级面13与加工头的阶级面223之间会形成一间隙，让该凸部221可完全插入凹部11中，如此可使夹持柄10与加工头20确实的接合。
接着请参考图3至图5。理想状况下，如图3所示，夹持柄10及加工头20的每一表面皆位于目标位置上，因此组装后组接部22中，中心定位柱222的外壁面能完整地贴合于中心定位孔12的内壁面，且凸部221的各个弧面也能完整地贴合于凹部11的各个弧面。
然而，实际情况下，如图4及图5所示，制造、加工难免会有误差。即便是圆形截面的中心定位柱222及中心定位孔12精度较高而仍使两者的轴心能保持于夹持柄10及加工头20的轴心上，但截面非圆形的凹部11及凸部221的轴心往往不会在夹持柄10及加工头20的轴心上。举例而言，假设夹持柄10、凹部11、及中心定位孔12的轴心恰好在同一轴线X上，且加工头20及中心定位柱222的轴心也恰好在 所述同一轴线X上，但凸部221的轴心不在轴线X上而是在轴线Y上而有所偏移。通过凹部11及凸部221为渐缩的锥状面，凹部11及凸部221的轴心的偏移程度(即轴线X与轴线Y的间距大小)仅会影响凸部221深入凹部11的程度，但凸部221的弧面仍能抵靠于凹部11的弧面，因此夹持柄10仍能驱动加工头20。
请一并参考图6A及6B，其为本发明第一实施例的加工头20的不同态样。具体而言，凸部221可具有三个弧面，且各弧面之间相连接处导为圆角，因此各弧面对应于加工头20的中心轴延伸了120度角，夹持柄的凹部需相匹配(图中未示)。接着请参考图7A及7B，其为本发明第一实施例的加工头20的又一态样，其凸部221可具有四个弧面，因此各弧面对应于加工头20的中心轴延伸了90度角，夹持柄的凹部需相匹配(图中未示)。然而，凸部221及凹部的形状并不以此为限。
接着请再次参考图1及图2。连接部23位于加工部21与组接部22之间，且组接部22通过连接部23固设于加工部21，且本实施例中加工部21、组接部22、及连接部23为一体成形。连接部23的截面形状及大小与夹持柄10的截面形状及大小相同。因此，在组装后，连接部23的侧面抵靠于夹持柄10形成有容置槽100的端面，且连接部23的外壁面与夹持柄10的外壁面连接成一圆柱面。通过连接部23，加工部21可远离夹持柄10，以减少运行使夹持柄10损伤的机会。
凹槽24凹陷形成于加工头20朝向夹持柄10的一侧，换句话说，凹槽24形成于组接部22上。更进一步而言，凹槽24凹陷形成于加工头20的中心轴，因此凹槽24正对并连通于夹持柄10的贯穿孔14。凹槽24的内壁可形成有螺纹。
固接件30能连接固定夹持柄10及加工头20。本实施例中，是将固接件30由夹持柄10远离加工头20的一端放入夹持柄10的贯穿孔14，并使固接件30螺合于贯穿孔14内壁的螺纹。而固接件30的一部分伸入夹持柄10的容置槽100，因此能伸入加工头20的凹槽24而螺合于凹槽24内壁的螺纹。由此便能将夹持柄10及加工头20连接固定。
通过上述结构，在将加工头20固定于夹持柄10的过程中，是将以加工头20的组接部22先穿入夹持柄10的容置槽100内。在将组接部22穿入容置槽100时，首先组接部22的中心定位柱222伸入容置 槽100的中心定位孔12。由于中心定位孔12较远离容置槽100的开口，中心定位柱222伸入并抵靠于中心定位孔12时，可辅助加工头20的转动中心轴对齐于夹持柄10的转动中心轴，而使两转动中心轴各在对方的沿伸线上。换句话说，通过中心定位柱222抵靠于中心定位孔12，组接时可防止加工头20的转动中心轴与夹持柄10的转动中心轴相歪斜。中心定位柱222及中心定位孔12的截面为圆形，因此加工头20能以任意方向角放入夹持柄10中。
接着，随着组接部22更进一步穿入容置槽100时，凸部221便能伸入并抵靠于凹部11。通过凸部221及凹部11的截面不为圆形，及凸部221于转动中心轴方向的厚度小于凹部11于转动中心轴方向的深度，加工头20以转动中心轴为转轴转动即可轻易以正确位置伸入于凹部11内，因此能使加工头20以正确的角度固设于夹持柄10上。因此，通过上述两阶段地将组接部22穿入容置槽100，可确保加工头20相对于夹持柄10不会歪斜且位于正确的角度。另外，通过凹部11与凸部221皆为渐缩，于组装过程中，在将凸部221伸入并抵靠于凹部11时，即使加工头20于转动中心轴上转动的角度略有误差，凸部221仍可沿着渐缩的凹部11而一边进入而一边转动至正确的角度，因此在组装上更为方便。
最后，再以固接件30使加工头20固定于夹持柄10上。
接着请参考图8。于本发明的第二实施例中，技术特征与第一实施例相似，差异仅在于夹持柄10A不具有贯穿孔，而是具有凹槽14A，且加工头20A不具有凹槽，而是具有贯穿孔24A。换句话说，相对于前述实施例，是将夹持柄及加工头上的贯穿孔及凹槽相反设置而成为第二实施例。详细而言，凹槽14A凹陷形成于夹持柄10A朝向加工头20A的一侧，且位于容置槽100内，并沿夹持柄10A的中心向内延伸。贯穿孔24A沿轴向贯穿加工头20A的中心轴，且内壁可形成有螺纹。由此，在将加工头20A连接固定于夹持柄10A时，是将固接件30由加工头20A远离夹持柄10A的一侧放入加工头20A的贯穿孔24A内，且使固接件30的一部分伸入夹持柄10A的凹槽14A内，由此固接件30能同时螺合于夹持柄10A及加工头20A。
综上所述，本发明通过于夹持柄10的容置槽100内设置了大小不 同的凹部11及中心定位孔12，以及加工头20的组接部22上设置了对应于凹部11的凸部221及对应于中心定位孔12的中心定位柱222，于组装夹持柄10与加工头20时是两阶段地将加工头20的组接部22穿入夹持柄10的容置槽100。且通过此两阶段穿入的过程，能使加工头20的转动轴心与夹持柄10的转动轴心于一直线上，且能使加工头20转至正确的角度后才嵌合于夹持柄10上。因此，加工头20能紧密地固设于夹持柄10上且不会有任何方向或角度上的歪斜，使得在加工过程中不会因过度的震动松脱。另一方面，通过凹部11的壁面朝中心定位孔12渐缩形成一锥状面，以及凸部221的壁面朝中心定位柱222渐缩也形成一锥状面，无论是凹部11或凸部221任何一者于制造时有所误差，加工头20仍能顺利地安装于夹持柄上，能不受误差的影响地安装，且于正转与反转交替时弧面仍能保持抵靠而使加工头20与夹持柄10不会错动，就像是没有误差一般。
以上所述仅是本发明的较佳实施例而已，并非对本发明做任何形式上的限制，虽然本发明已以较佳实施例披露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案的范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (5)

  1. 一种加工工具的组接中心定位结构，其特征在于，该加工工具的组接中心定位结构具有：
    一夹持柄，该夹持柄具有一容置槽；该容置槽位于该夹持柄一端的端面，并形成有：
    一凹部，该凹部邻接该容置槽的一开口；该凹部包含多个弧面，该凹部的所述弧面的曲率半径相同且曲率中心不在同一点；及
    一中心定位孔，该中心定位孔壁面为一圆形直筒面；相对于该凹部，该中心定位孔更远离该容置槽的该开口；该凹部的壁面朝该中心定位孔渐缩形成一锥状面；
    一加工头，该加工头具有：
    一能对工件加工的加工部；及
    一能容置于该夹持柄的该容置槽内的组接部，该组接部固设于该加工部，并形成有：
    一与该凹部相匹配而能容置于该凹部内的凸部，该凸部包含多个弧面，该凸部的所述弧面的数量等于该凹部的所述弧面的数量；该加工头的各该弧面的曲率半径相同且曲率中心不在同一点；及
    一与该中心定位孔相匹配而能容置于该中心定位孔内的中心定位柱，该中心定位柱的壁面亦为一圆形直筒面；相对于该凸部，该中心定位柱更远离该加工部；该凸部的壁面朝该中心定位柱渐缩也形成一锥状面；以及
    一能连接固定该夹持柄及该加工头的固接件；
    其中，当该组接部容置于该容置槽时，该凸部的各个弧面分别抵靠贴合于该凹部的其中一弧面，该中心定位柱的壁面抵靠贴合于该中心定位孔的内周面，且该夹持柄的转动中心轴与该加工头的转动中心轴呈一直线。
  2. 根据权利要求1所述的加工工具的组接中心定位结构，其特征在于，该夹持柄的该容置槽还具有一阶级面，该容置槽的该阶级面位于该凹部及该中心定位孔之间；该加工头的该组接部也具有一阶级面， 该组接部的该阶级面位于该凸部及该中心定位柱之间；该凸部沿转动中心轴方向的厚度小于该凹部沿转动中心轴方向的深度，该夹持柄的该阶级面与该加工头的该阶级面相正对，且该夹持柄的该阶级面与该加工头的该阶级面之间形成一间隙。
  3. 根据权利要求1或2所述的加工工具的组接中心定位结构，其特征在于，该加工头还具有一连接部，该连接部位于该加工部与该组接部之间，且该组接部通过该连接部固设于该加工部；该连接部的截面形状及大小与该夹持柄的截面形状及大小相同。
  4. 根据权利要求1或2所述的加工工具的组接中心定位结构，其特征在于：
    该夹持柄还形成有一贯穿孔，该贯穿孔轴向贯穿该夹持柄的转动中心轴；
    该加工头还形成有一凹槽，该凹槽凹陷形成于该加工头朝向该夹持柄的一侧，且正对并连通于该夹持柄的该贯穿孔；且
    该固接件穿设并螺合于该贯穿孔及凹槽内。
  5. 根据权利要求1或2所述的加工工具的组接中心定位结构，特征在于：
    该夹持柄还形成有一凹槽，该凹槽凹陷形成于该夹持柄朝向该加工头的一侧；
    该加工头还形成有一贯穿孔，该贯穿孔轴向贯穿该加工头的转动中心轴，且正对并连通于该夹持柄的该凹槽；且
    该固接件穿设并螺合于该贯穿孔及凹槽内。
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