CN114833365A - Aligning clearance eliminating cutter bar and machining center - Google Patents

Aligning clearance eliminating cutter bar and machining center Download PDF

Info

Publication number
CN114833365A
CN114833365A CN202210501068.2A CN202210501068A CN114833365A CN 114833365 A CN114833365 A CN 114833365A CN 202210501068 A CN202210501068 A CN 202210501068A CN 114833365 A CN114833365 A CN 114833365A
Authority
CN
China
Prior art keywords
sleeve
cutter
shaft sleeve
shaft
expansion
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.)
Granted
Application number
CN202210501068.2A
Other languages
Chinese (zh)
Other versions
CN114833365B (en
Inventor
黄水利
张富强
郑利强
韩飞
黄海杰
罗增齐
张元彪
刘燕萍
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.)
Beijing Ninghua Technology Co ltd
Original Assignee
Beijing Ninghua Technology 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 Beijing Ninghua Technology Co ltd filed Critical Beijing Ninghua Technology Co ltd
Priority to CN202210501068.2A priority Critical patent/CN114833365B/en
Publication of CN114833365A publication Critical patent/CN114833365A/en
Application granted granted Critical
Publication of CN114833365B publication Critical patent/CN114833365B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B29/00Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Drilling And Boring (AREA)

Abstract

The invention discloses a center-adjustable clearance-eliminating cutter bar, which comprises a cutter bar tail handle, a slightly-expanded shaft sleeve, a centering assembly and a clearance-eliminating assembly, the first end of the slightly expanded shaft sleeve is divided into a plurality of petals along the circumferential direction to form an expansion part, and the inner wall of the slightly expanded shaft sleeve is set to be a conical inner wall surface, a taper sleeve which is matched with the taper of the conical inner wall surface is arranged in the inner cavity of the slight expansion shaft sleeve, the taper sleeve is connected on the connecting shaft, the connecting shaft is adjusted to move towards the small end of the conical inner wall surface, thereby make the expansion portion of taper sleeve extrusion slight expansion axle sleeve, realize the radial even expansion of expansion portion to reach and eliminate slight expansion axle sleeve and wait to process the purpose in clearance between the cutter, the aligning subassembly is through adjusting the butt pressure between different jackscrew and the aligning axle, adjusts the concentricity between slight expansion axle sleeve and the cutter arbor caudal peduncle, avoids the drawback that can't adjust after radially jumping to the out-of-tolerance, has further ensured the machining precision of cutter. The invention also discloses a machining center with the aligning anti-backlash cutter bar.

Description

Aligning clearance eliminating cutter bar and machining center
Technical Field
The invention belongs to the field of electric spark discharge machining, relates to a functional part of an electric spark cutter edge grinding machine tool, and particularly relates to a center-adjustable gap-eliminating cutter bar and a machining center.
Background
Polycrystalline diamond spiral cutter, polycrystalline diamond maize sword are the tire form class cutter that the tooth adopted polycrystalline diamond compact, because of its hardness of polycrystalline diamond is higher, reflect the advantage to its processing gradually with electric spark discharge, in the course of working, the cutter need pass through the cutter mounting hole and install on the processing handle of a knife of lathe, because of polycrystalline diamond spiral cutter requires higher machining precision, so to propose higher requirement to the installation of adding man-hour spiral cutter.
The traditional electric spark machine tool machining tool comprises the following processes: the cutter is arranged on a cutter bar of a machine tool, and after the cutter is tightly pressed by a gland, the cutter is driven to rotate by rotating the cutter bar, so that the teeth are subjected to electric discharge machining one by one. The diameter of a traditional cutter bar is certain, the diameter of the cutter bar is greatly different from the central aperture of a cutter for the convenience of clamping, the cutter is arranged on the cutter bar, the cutter and the cutter bar are in clearance fit, after the cutter is tightly pressed, the actual circle center of the cutter is not the same as the circle center of the cutter bar, but when the cutter is used, the cutter is rotated at a high speed by taking the circle center of the cutter as the center. This results in the center of the rotation circle being not the same as the center of the circle when the tool is being machined and used. The cutter is machined through the rotary cutter rod, the circle center of the excircle of the machined cutter is actually the circle center of the cutter rod but not the circle center of the cutter, and the radial runout precision of the machined cutter is influenced by the size of clearance fit between the cutter and the cutter rod. For a spiral cutter with high machining precision, the influence cannot meet the machining requirement of high precision.
At present, the existing method for eliminating the gap between the cutter mounting hole and the cutter handle in the market can adopt a hydraulic expansion sleeve, but the hydraulic expansion sleeve has the defects of high price, easy damage, easy radial jump to out-of-tolerance and incapability of adjusting after out-of-tolerance.
Disclosure of Invention
The invention aims to provide a center-adjustable clearance-eliminating cutter bar and a machining center, which can eliminate clearance fit between a cutter and the cutter bar when the cutter bar is installed, eliminate the influence of the clearance fit on the radial runout machining precision of the cutter and realize concentricity adjustment so as to solve the problems that the existing hydraulic expansion sleeve is easy to jump to an out-of-tolerance in the radial direction and cannot be adjusted after the out-of-tolerance.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a center-adjustable clearance-eliminating cutter bar, which comprises:
the first end of the cutter bar tail handle is used for connecting a machine tool, and the center of the end surface of the second end of the cutter bar tail handle is provided with a centering shaft which is coaxial with the cutter bar tail handle;
the inner wall surface of the slightly expanded shaft sleeve is a conical inner wall surface, the large head end of the conical inner wall surface is positioned at the first end of the slightly expanded shaft sleeve, the small head end of the conical inner wall surface is positioned at the second end of the slightly expanded shaft sleeve, and the outer wall of the slightly expanded shaft sleeve is used for sleeving a tool to be machined; the side wall of the first end of the slightly-expanded shaft sleeve is provided with a plurality of gaps extending along the axial direction of the slightly-expanded shaft sleeve, and the gaps are distributed at intervals along the circumferential direction of the slightly-expanded shaft sleeve so as to divide the first end of the slightly-expanded shaft sleeve into a plurality of petals along the circumferential direction to form an expansion part; a connecting flange which is in butt joint with the second end of the cutter bar tail handle is arranged at the second end of the micro-expansion shaft sleeve, a through hole which is coaxial and communicated with the micro-expansion shaft sleeve is formed in the center of the connecting flange, the aperture of the through hole is larger than the outer diameter of the micro-expansion shaft sleeve, and the aligning shaft sleeve is arranged in the through hole;
the aligning assembly comprises a plurality of jackscrews in threaded connection with the connecting flange, the jackscrews are uniformly distributed along the circumferential direction of the aligning shaft, any one of the jackscrews is radially arranged along the aligning shaft, and the bottom end of any one of the jackscrews can penetrate through the radial side wall of the connecting flange and extend into the through hole to be abutted against the aligning shaft; the abutting pressure between the different jackscrews and the adjusting shaft is adjusted, so that the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle can be adjusted;
the clearance eliminating assembly comprises a connecting shaft and a taper sleeve sleeved on the periphery of the connecting shaft, a first end of the connecting shaft penetrates through the slightly-expanded shaft sleeve and is in threaded connection with a second end of the cutter bar tail handle, the taper sleeve is located in the slightly-expanded shaft sleeve, the outer wall surface of the taper sleeve is a conical outer wall surface matched with the inner wall surface of the taper sleeve, the thread is screwed in, the connecting shaft can radially and uniformly expand the expansion part through the taper sleeve, and therefore the clearance between the slightly-expanded shaft sleeve and the cutter to be machined is eliminated.
Optionally, the second end of the tool bar tail handle is connected with the connecting flange through a screw.
Optionally, the outer wall of the centering shaft is provided with a plurality of insertion holes for inserting the jackscrews, any one of the insertion holes is arranged along the radial direction of the centering shaft, and the depths of any two of the insertion holes are the same.
Optionally, the gap is a bar-shaped uniform gap, and a circular opening communicated with the bar-shaped uniform gap is formed in the side wall of the second end of the slightly-expanded shaft sleeve.
Optionally, four slits are formed in the slightly-expanded shaft sleeve at intervals in the circumferential direction.
Optionally, the first end of the connecting shaft is further sleeved with a retaining ring, and the retaining ring abuts against the end portion of the taper sleeve.
Optionally, the connecting shaft is a bolt rod, a washer is sleeved on the bolt rod, and the washer is located between the head of the bolt rod and the taper sleeve.
The invention also provides a machining center which comprises a machine tool, a pressing block and the center-adjustable clearance-eliminating cutter bar as claimed in any one of claims 1 to 7, wherein the first end of the tail handle of the cutter bar is connected to the machine tool, and the pressing block is connected to the second end of the connecting shaft and used for tightly pressing the cutter to be machined sleeved on the periphery of the micro-expansion shaft sleeve.
Optionally, the pressing block is a dividing head pressing plate, and the dividing head pressing plate is connected to the second end of the connecting shaft through a bolt.
Optionally, the tool also comprises a checking tool which can be sleeved outside the micro-expansion shaft sleeve, and the checking tool is used for detecting the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle.
Compared with the prior art, the invention achieves the following technical effects:
the center-adjustable clearance-eliminating cutter bar provided by the invention has a novel and reasonable structure, the first end of the micro-expansion shaft sleeve is divided into a plurality of petals along the circumferential direction to form an expansion part, the inner wall of the micro-expansion shaft sleeve is set as a conical inner wall surface, a conical sleeve matched with the conical inner wall surface in a taper mode is arranged in the inner cavity of the micro-expansion shaft sleeve, the conical sleeve is connected onto the connecting shaft, after a cutter to be machined is sleeved outside the micro-expansion shaft sleeve, the connecting shaft is adjusted to move towards the small head end of the conical inner wall surface, so that the conical sleeve extrudes the expansion part of the micro-expansion shaft sleeve, the radial uniform expansion of the expansion part is realized, the purpose of eliminating the clearance between the micro-expansion shaft sleeve and the cutter to be machined can be achieved, the machining precision of the cutter is improved, the problem that the radial jump is over-poor is thoroughly solved, and the machining requirement of a high-precision cutter is met.
Meanwhile, the center-adjustable clearance-eliminating cutter bar provided by the invention is provided with the centering assembly, the centering assembly abuts against the periphery of the centering shaft on the cutter bar tail handle through the jackscrew arranged on the connecting flange of the slightly-expanded shaft sleeve, the concentricity between the slightly-expanded shaft sleeve and the cutter bar tail handle can be adjusted by adjusting the abutting pressure between different jackscrews and the centering shaft, the centering can be performed once after clearance elimination adjustment every time, the defect that the cutter bar cannot be adjusted after radial jump to an over-tolerance is avoided, and the processing precision of the cutter is further ensured.
The machining center is provided with a pressing block for pressing a tool to be machined and a checking fixture for detecting the concentricity between the micro-expansion shaft sleeve and the tail handle of the cutter bar, wherein the pressing block and the checking fixture are of detachable structures, the pressing block is mainly used in the machining of the cutter, and the checking fixture is used before or after the machining of the cutter, so that the machining process of the cutter can be smoothly and efficiently carried out, and the machining precision of the cutter is favorably ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of an overall structure of a tool bar capable of adjusting center and eliminating backlash according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a tool shank according to an embodiment of the present invention;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a schematic structural view of a slightly expanded shaft sleeve disclosed in an embodiment of the present invention;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a schematic structural diagram of a connecting shaft according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a taper sleeve disclosed in the embodiments of the present invention;
FIG. 8 is a schematic structural diagram of a retainer ring according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a reducing sleeve (gauge) disclosed in the embodiment of the present invention.
Wherein the reference numerals are:
100. the center-adjustable clearance-eliminating cutter bar;
1. a tail handle of the cutter bar; 2. adjusting a shaft; 3. slightly expanding the shaft sleeve; 4. a gap; 5. a connecting flange; 6. a through hole; 7. a jackscrew mounting hole; 8. a connecting shaft; 9. a taper sleeve; 10. a screw; 11. a jack; 12. a circular opening; 13. a retainer ring; 14. a gasket; 15. briquetting; 16. a checking fixture; 17. a tip hole; 18. a threaded bore.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a center-adjustable clearance-eliminating cutter bar, which can eliminate clearance fit between a cutter and the cutter bar when the cutter bar is installed, eliminate the influence of the clearance fit on the radial runout machining precision of the cutter and realize concentricity adjustment so as to solve the problems that the existing hydraulic expansion sleeve is easy to jump to an out-of-tolerance in the radial direction and cannot be adjusted after the out-of-tolerance.
The invention also aims to provide a machining center with the self-aligning anti-backlash cutter bar.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1 to 9, the present embodiment provides a center-adjustable clearance-eliminating cutter bar 100, which mainly includes a cutter bar tail handle 1, a micro-expansion shaft sleeve 3, a center adjusting component and a clearance eliminating component, wherein a first end of the cutter bar tail handle 1 is used for connecting a machine tool, and a center adjusting shaft 2 coaxial with the cutter bar tail handle 1 is arranged in the center of an end face of a second end of the cutter bar tail handle 1; the inner wall surface of the micro-expansion shaft sleeve 3 is a conical inner wall surface, the big end of the conical inner wall surface is positioned at the first end of the micro-expansion shaft sleeve 3, the small end of the conical inner wall surface is positioned at the second end of the micro-expansion shaft sleeve 3, and the outer wall of the micro-expansion shaft sleeve 3 is used for sleeving a tool to be machined; a plurality of gaps 4 extending along the axial direction of the micro-expansion shaft sleeve 3 are formed in the side wall of the first end of the micro-expansion shaft sleeve 3, and the plurality of gaps 4 are uniformly distributed along the circumferential direction of the micro-expansion shaft sleeve 3 at intervals so as to divide the first end of the micro-expansion shaft sleeve 3 into a plurality of pieces along the circumferential direction to form an expansion part; a connecting flange 5 butted with the second end of the cutter bar tail handle 1 is arranged at the second end of the micro-expansion shaft sleeve 3, a through hole 6 coaxial and communicated with the micro-expansion shaft sleeve 3 is formed in the center of the connecting flange 5, the aperture of the through hole 6 is larger than the outer diameter of the micro-expansion shaft sleeve 3, the aligning shaft 2 is sleeved in the through hole 6, and preferably, the aligning shaft 2 is in clearance fit with the through hole 6; the aligning assembly comprises a plurality of jackscrews in threaded connection with the connecting flange 5, the jackscrews are uniformly distributed along the circumferential direction of the aligning shaft 2, any one of the jackscrews is arranged along the radial direction of the aligning shaft 2, and the bottom end of any one of the jackscrews can penetrate through the radial side wall of the connecting flange 5 and extend into the through hole 6 to be abutted against the aligning shaft 2; the abutting pressure between different jackscrews and the self-aligning shaft 2 is adjusted, and the concentricity between the micro-expansion shaft sleeve 3 and the cutter bar tail handle 1 can be adjusted; the anti-backlash subassembly includes that connecting axle 8 and cover locate the taper sleeve 9 of connecting axle 8 periphery, and in the little bloated axle sleeve 3 was worn to locate by the first end of connecting axle 8 to with the second end threaded connection of cutter arbor caudal peduncle 1, taper sleeve 9 is located little bloated axle sleeve 3, and the outer wall of taper sleeve 9 be with the toper outer wall of toper internal face looks adaptation, and the screw thread precession connecting axle 8 can be through taper sleeve 9 with the radial even bloated-out of expansion portion, in order to eliminate little bloated axle sleeve 3 and wait to process the clearance between the cutter. The center-adjustable clearance-eliminating cutter bar 100 can eliminate the influence of clearance fit on the radial runout machining precision of the cutter and can realize concentricity adjustment.
In this embodiment, the connecting flange 5 is a connecting portion located at an outer edge of the end portion of the micro-expansion shaft sleeve 3, and does not refer to a flange structure in the conventional sense, and a continuous ring structure of a conventional flange may be used, or a manner of spaced-apart distribution of hangers may be used. As a preferable mode, the connecting flange 5 of the present embodiment is a continuous circular ring structure of a conventional flange, as shown in fig. 5, 8 threaded holes 18 are uniformly distributed on the connecting flange, and any one of the threaded holes 18 is arranged along the axial direction of the connecting flange 5; correspondingly, 4 jackscrew mounting holes 7 are uniformly arranged on the side wall of the connecting flange 5, the jackscrew mounting holes 7 are threaded holes and are arranged along the radial direction of the connecting flange 5, the 4 jackscrew mounting holes 7 and the 8 threaded holes 18 are arranged in a staggered manner, and one jackscrew mounting hole 7 is arranged on two threaded holes 18 at intervals on the transverse section of the connecting flange 5, as shown in fig. 5. Correspondingly, the second end of the cutter arbor tail handle 1 can be provided with another flange structure butted with the connecting flange 5, the other flange structure is uniformly provided with another 8 threaded holes 18 along the circumferential direction, the threaded holes 18 on the other flange structure are aligned with the threaded holes 18 on the connecting flange 5, the flange structure at the second end of the cutter arbor tail handle 1 can be connected with the connecting flange 5 through the screws 10, and therefore the micro-expansion shaft sleeve 3 is fixed on the cutter arbor tail handle 1.
In this embodiment, set up a plurality of jacks 11 that supply jackscrew male on the outer wall of aligning axle 2, arbitrary jack 11 all arranges along aligning axle 2's radial, and two arbitrary jacks 11's degree of depth are the same. After the slightly-expanded shaft sleeve 3 is fixed to the cutter bar tail handle 1 through a screw 10, the jackscrew mounting holes 7 in the connecting flange 5 are aligned with the insertion holes 11 in the aligning shaft 2 one by one, the jackscrews sequentially penetrate through the jack holes, and the jackscrews are inserted into the hole bottoms of the insertion holes 11, so that the jackscrews are tightly pushed against the aligning shaft 2.
In this embodiment, four slits 4 are evenly opened along its circumference at the first end of the micro-expansion shaft sleeve 3. The gap 4 is a strip-shaped uniform gap, and a circular opening 12 communicated with the strip-shaped uniform gap is formed in the side wall of the second end of the micro-expansion shaft sleeve 3, as shown in fig. 4.
In this embodiment, the connecting shaft 8 is a bolt rod, the first end of the connecting shaft 8 is further sleeved with a retaining ring 13, and the retaining ring 13 abuts against the end portion of the taper sleeve 9. The retainer ring 13 is fixed on the connecting shaft 8 through a bolt, the connecting shaft 8 is taken out towards the direction far away from the cutter bar tail handle 1, and the retainer ring 13 can drive the taper sleeve 9 to be taken out from the first end of the slightly-expanded shaft sleeve 3 together. During installation, the tip end of the connecting shaft 8 is inserted into the center hole 17 of the cutter bar tail handle 1 and is in threaded fit with the center hole 17, a gasket 14 is sleeved on the connecting shaft 8, and when the connecting shaft 8 is installed in place, the gasket 14 is located between the head of the connecting shaft 8 and the taper sleeve 9. Among these, the washer 14 is preferably a quenched washer.
The working principle of the self-aligning anti-backlash tool bar 100 of the present embodiment will be described in detail below.
The cutter arbor caudal peduncle 1 passes through the screw 10 with the axle sleeve 3 that expands a little and is connected, it has four adjusting holes (being jackscrew mounting hole 7) that are equipped with the jackscrew to expand a little on the axle sleeve 3, the jackscrew pushes up on the self-aligning axle periphery of cutter arbor caudal peduncle 1, the axle sleeve part of the axle sleeve 3 that expands a little is cut and is had four gaps 4, still be provided with two and move back the sword handle hole, retaining ring 13, taper sleeve 9 are installed in the axle sleeve 3 that expands a little in proper order, the cover has connecting axle 8 (being the screw thread axle) of packing ring 14 to pass taper sleeve 9, retaining ring 13, the threaded mounting is on the apex hole 17 of cutter arbor caudal peduncle 1. The periphery of retaining ring 13 sets up two concave end holding screws, and the tool withdrawal handle hole with little bloated axle sleeve 3 aligns, treats that the processing cutter suit is on little bloated axle sleeve 3, and on connecting axle 8 (threaded shaft promptly) was installed through screw or bolt to briquetting 15, the both ends of treating the processing cutter this moment offset with briquetting 15 and flange 5 respectively, avoid taking place axial displacement in the course of working. The four jackscrews on the slightly-expanded shaft sleeve 3 are adjusted, the concentricity of the cutter bar tail handle 1 and the slightly-expanded shaft sleeve 3 can be adjusted, and the radial runout of the slightly-expanded shaft sleeve 3 is adjusted.
To take out the taper sleeve 9, two concave end fastening screws on the retainer ring 13 can be screwed, so that the retainer ring 13 is connected with the connecting shaft 8 (namely, a threaded shaft), and the retainer ring 13 can be driven to withdraw by loosening the connecting shaft 8 (namely, the threaded shaft), so that the taper sleeve 9 is driven to withdraw, and the taper sleeve 9 is taken out. When a cutter is machined, the spiral cutter mounting hole is sleeved on the micro-expansion shaft sleeve 3, the shaft sleeve part of the micro-expansion shaft sleeve 3 is in taper fit with the taper sleeve 9, and the micro-expansion shaft sleeve 3 can be expanded by pressing the connecting shaft 8 (namely a threaded shaft), so that the gap between the micro-expansion shaft sleeve 3 and the cutter mounting hole can be eliminated. After the clearance is eliminated, the spiral knife is pressed tightly by the pressing block 15.
Therefore, the center-adjustable gap-eliminating cutter bar provided by the embodiment is novel and reasonable in structure, the first end of the slightly-expanded shaft sleeve is divided into the multiple petals along the circumferential direction to form the expansion part, the inner wall of the slightly-expanded shaft sleeve is arranged to be the conical inner wall surface, the inner cavity of the slightly-expanded shaft sleeve is provided with the taper sleeve matched with the conical inner wall surface in a taper mode, the taper sleeve is connected onto the connecting shaft, after the cutter to be machined is sleeved on the outer portion of the slightly-expanded shaft sleeve, the connecting shaft is adjusted to move towards the small head end of the conical inner wall surface, the expansion part of the slightly-expanded shaft sleeve is extruded by the taper sleeve, radial uniform expansion of the expansion part is achieved, the purpose of eliminating the gap between the slightly-expanded shaft sleeve and the cutter to be machined can be achieved, the machining precision of the cutter is improved, the problem that radial jumping is out of tolerance is thoroughly solved, and the machining requirement of the high-precision cutter is met.
Simultaneously, the adjustable heart gap cutter arbor that disappears that this embodiment provided has set up the aligning subassembly, the aligning subassembly is through setting up the jackscrew on the flange of the axle sleeve that expands a little and withstand the periphery of adjusting the axle on the cutter arbor tail handle, butt pressure between different jackscrew and the aligning axle is adjusted to the accessible, and then adjust the concentricity between axle sleeve and the cutter arbor tail handle that expands a little, can eliminate the gap at every turn and adjust the back and carry out a centering, avoid radially jumping the drawback that can't adjust behind the out-of-tolerance, the machining precision of cutter has further been ensured.
Example two
The embodiment provides a machining center, which comprises a machine tool, a pressing block 15 and a center-adjustable clearance-eliminating cutter bar 100 as in the first embodiment, wherein a first end of a tail handle 1 of the cutter bar is connected to the machine tool, and the pressing block 15 is connected to a second end of a connecting shaft 8 and used for pressing a cutter to be machined, which is sleeved on the periphery of a micro-expansion shaft sleeve 3. As shown in fig. 1, the pressing piece 15 is preferably an index head platen, which is connected to the second end of the connecting shaft 8, i.e., the head of the connecting shaft 8, by bolts.
In this embodiment, the tool holder further includes a measuring tool 16 capable of being sleeved outside the micro-expansion shaft sleeve 3, the measuring tool 16 may be a conventional diameter-changing sleeve (or referred to as a "measuring tool sleeve"), and before the tool is sleeved on the micro-expansion shaft sleeve 3, the measuring tool 16 may be sleeved outside the micro-expansion shaft sleeve 3 to detect concentricity between the micro-expansion shaft sleeve 3 and the tool shank 1. When the gauge 16 is used, the reducing sleeve (or called as a gauge sleeve) is sleeved on the micro-expansion shaft sleeve 3 and then is pressed tightly by the pressing block 15. Through radial jump of the inspection reducing sleeve (or called as an inspection tool sleeve), four jackscrews on the micro-expansion shaft sleeve 3 are adjusted, then the concentricity of the reducing sleeve (or called as an inspection tool sleeve) and the cutter bar tail handle 1 can be realized, then a screw 10 connected between the cutter bar tail handle 1 and the micro-expansion shaft sleeve 3 is locked, the concentricity of the cutter bar tail handle 1 and the micro-expansion shaft sleeve 3 can be realized, and then the reducing sleeve (or called as an inspection tool sleeve) is taken down. Then, a tool to be machined can be sleeved on the micro-expansion shaft sleeve 3 for machining the tool. When a cutter is machined, a mounting hole of the cutter to be machined is sleeved on the micro-expansion shaft sleeve 3, the shaft sleeve part of the micro-expansion shaft sleeve 3 is in taper fit with the taper sleeve 9, and the micro-expansion shaft sleeve 3 can be expanded by pressing the connecting shaft 8 (namely a threaded shaft), so that the gap between the micro-expansion shaft sleeve 3 and the cutter mounting hole can be eliminated. After the clearance is eliminated, the pressing block 15 presses the cutter (such as a screwer).
The machining center that this embodiment provided has configured the briquetting that is used for compressing tightly treating the processing cutter and has been used for detecting the utensil of examining of concentricity between the two of little bloated axle sleeve and cutter arbor caudal peduncle for adjustable heart gap eliminating cutter arbor, and the briquetting is detachable construction with examining the utensil, and the briquetting mainly uses in the cutter processing, examines before the cutter processing or use after finishing processing for the cutter course of working can go on high-efficiently smoothly, is favorable to guaranteeing the machining precision of cutter.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claims.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (10)

1. The utility model provides an adjustable center anti-backlash cutter arbor which characterized in that includes:
the first end of the cutter bar tail handle is used for connecting a machine tool, and the center of the end surface of the second end of the cutter bar tail handle is provided with a centering shaft which is coaxial with the cutter bar tail handle;
the inner wall surface of the slightly expanded shaft sleeve is a conical inner wall surface, the large head end of the conical inner wall surface is positioned at the first end of the slightly expanded shaft sleeve, the small head end of the conical inner wall surface is positioned at the second end of the slightly expanded shaft sleeve, and the outer wall of the slightly expanded shaft sleeve is used for sleeving a tool to be machined; the side wall of the first end of the slightly-expanded shaft sleeve is provided with a plurality of gaps extending along the axial direction of the slightly-expanded shaft sleeve, and the gaps are distributed at intervals along the circumferential direction of the slightly-expanded shaft sleeve so as to divide the first end of the slightly-expanded shaft sleeve into a plurality of petals along the circumferential direction to form an expansion part; a connecting flange which is in butt joint with the second end of the cutter bar tail handle is arranged at the second end of the micro-expansion shaft sleeve, a through hole which is coaxial and communicated with the micro-expansion shaft sleeve is formed in the center of the connecting flange, the aperture of the through hole is larger than the outer diameter of the micro-expansion shaft sleeve, and the aligning shaft sleeve is arranged in the through hole;
the aligning assembly comprises a plurality of jackscrews in threaded connection with the connecting flange, the jackscrews are uniformly distributed along the circumferential direction of the aligning shaft, any one of the jackscrews is radially arranged along the aligning shaft, and the bottom end of any one of the jackscrews can penetrate through the radial side wall of the connecting flange and extend into the through hole to be abutted against the aligning shaft; the abutting pressure between the different jackscrews and the adjusting shaft is adjusted, so that the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle can be adjusted;
the clearance eliminating assembly comprises a connecting shaft and a taper sleeve sleeved on the periphery of the connecting shaft, a first end of the connecting shaft penetrates through the slightly-expanded shaft sleeve and is in threaded connection with a second end of the cutter bar tail handle, the taper sleeve is located in the slightly-expanded shaft sleeve, the outer wall surface of the taper sleeve is a conical outer wall surface matched with the inner wall surface of the taper sleeve, the thread is screwed in, the connecting shaft can radially and uniformly expand the expansion part through the taper sleeve, and therefore the clearance between the slightly-expanded shaft sleeve and the cutter to be machined is eliminated.
2. The adjustable center-clearance tool bar as claimed in claim 1, wherein a second end of the tool bar tail shank is connected with the connecting flange through a screw.
3. The tool bar capable of adjusting the center and eliminating the backlash as claimed in claim 1, wherein a plurality of insertion holes for inserting the jackscrew are formed in the outer wall of the adjusting shaft, any one of the insertion holes is arranged along the radial direction of the adjusting shaft, and the depths of any two of the insertion holes are the same.
4. The adjustable center gap eliminating cutter bar according to claim 1, wherein the gap is a bar-shaped uniform gap, and a circular notch communicated with the bar-shaped uniform gap is formed in the side wall of the second end of the slightly expanded shaft sleeve.
5. The adjustable center clearance eliminating cutter bar according to claim 1 or 4, wherein four slits are arranged at intervals in the circumferential direction of the slightly-expanded shaft sleeve.
6. The tool bar for adjusting the center and eliminating the clearance as claimed in claim 1, wherein a retaining ring is further sleeved at the first end of the connecting shaft, and the retaining ring abuts against the end of the taper sleeve.
7. The adjustable center-clearance tool bar as claimed in claim 1 or 6, wherein the connecting shaft is a bolt bar, a washer is sleeved on the bolt bar, and the washer is located between the head of the bolt bar and the taper sleeve.
8. A machining center is characterized by comprising a machine tool, a pressing block and the center-adjustable clearance-eliminating cutter rod according to any one of claims 1 to 7, wherein a first end of a tail handle of the cutter rod is connected to the machine tool, and the pressing block is connected to a second end of the connecting shaft and used for tightly pressing and sleeving the cutter to be machined on the periphery of the micro-expansion shaft sleeve.
9. The machining center according to claim 8, wherein the pressing block is an index head pressing plate, and the index head pressing plate is connected to the second end of the connecting shaft through a bolt.
10. The machining center according to claim 8 or 9, further comprising a gauge capable of being sleeved outside the micro-expansion shaft sleeve, wherein the gauge is used for detecting concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle.
CN202210501068.2A 2022-05-09 2022-05-09 Center-adjustable clearance-eliminating cutter bar and machining center Active CN114833365B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210501068.2A CN114833365B (en) 2022-05-09 2022-05-09 Center-adjustable clearance-eliminating cutter bar and machining center

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210501068.2A CN114833365B (en) 2022-05-09 2022-05-09 Center-adjustable clearance-eliminating cutter bar and machining center

Publications (2)

Publication Number Publication Date
CN114833365A true CN114833365A (en) 2022-08-02
CN114833365B CN114833365B (en) 2023-09-15

Family

ID=82570952

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210501068.2A Active CN114833365B (en) 2022-05-09 2022-05-09 Center-adjustable clearance-eliminating cutter bar and machining center

Country Status (1)

Country Link
CN (1) CN114833365B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090116916A1 (en) * 2006-04-18 2009-05-07 Shoushan Qiu Fine adjusting method of the feed amount of the boring cutter and the adjusting device thereof
CN201889661U (en) * 2010-11-23 2011-07-06 广西玉柴机器股份有限公司 Reamer floating joint
CN202239687U (en) * 2011-10-17 2012-05-30 冯明 Fine adjustment fine boring cutter
CN112536618A (en) * 2020-12-09 2021-03-23 成都齐平科技有限公司 Axial and radial adjusting mechanism for cutter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090116916A1 (en) * 2006-04-18 2009-05-07 Shoushan Qiu Fine adjusting method of the feed amount of the boring cutter and the adjusting device thereof
CN201889661U (en) * 2010-11-23 2011-07-06 广西玉柴机器股份有限公司 Reamer floating joint
CN202239687U (en) * 2011-10-17 2012-05-30 冯明 Fine adjustment fine boring cutter
CN112536618A (en) * 2020-12-09 2021-03-23 成都齐平科技有限公司 Axial and radial adjusting mechanism for cutter

Also Published As

Publication number Publication date
CN114833365B (en) 2023-09-15

Similar Documents

Publication Publication Date Title
US3994615A (en) Multiple part cutting tool
CN111515616A (en) Machining method of precision bearing seat
CN108481192B (en) Grinding clamp suitable for thin-wall long spacer bush and clamping method
CN114833365A (en) Aligning clearance eliminating cutter bar and machining center
CN200984656Y (en) Quick-change drill chuck for drilling
JP4227745B2 (en) Reaming tool with guide shank
CN203875356U (en) Special lathe for cylindrical turning of outer cylinder of impacter
CN212495448U (en) Slender shaft deep hole double boring cutter body
CN211490317U (en) Double-step single-spiral screw tap for processing double threaded holes of retainer assembly
CN112091340B (en) Machining method and clamp for slicing spring
CN213135081U (en) Precision machining clamp for thin-wall blind hole part
CN115213643A (en) Method for machining overlong hollow reducing high-precision rotor shaft of aero-engine
CN109822136B (en) Length-adjustable one-step forming double-sided chamfering cutter bar
CN209007160U (en) Dentistry Angled abutment processing oval eccentric collet
CN114074192A (en) Radial expansion device and method for thin-wall cylindrical structural part
RU62349U1 (en) THREADED MILL
CN204487859U (en) A kind of multi-line cutting machine sheave mounting structure
CN110695744A (en) Clamping tool and clamping method for alignment of part with concave-convex arc curved surface
CN221312636U (en) Napping end mill
CN219787382U (en) Lathe floating drilling device
CN219416915U (en) Processing clamping device of screw thread tensile sample
CN219746370U (en) Mechanical expansion mandrel for lathe
CN205465303U (en) Milling machine mills three lamella anchor clamps
CN203875355U (en) Special center for machining outer cylinder of impacter
CN220920936U (en) Lathe tool clamp for machining inclined outer circle side groove

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant