CN114833365B - Center-adjustable clearance-eliminating cutter bar and machining center - Google Patents
Center-adjustable clearance-eliminating cutter bar and machining center Download PDFInfo
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- CN114833365B CN114833365B CN202210501068.2A CN202210501068A CN114833365B CN 114833365 B CN114833365 B CN 114833365B CN 202210501068 A CN202210501068 A CN 202210501068A CN 114833365 B CN114833365 B CN 114833365B
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- 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
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- 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
- B23Q11/00—Accessories 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
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- 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
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
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Abstract
The invention discloses an adjustable center clearance elimination cutter bar, which comprises a cutter bar tail handle, a micro-expansion shaft sleeve, a center adjustment assembly and a clearance elimination assembly, wherein a first end of the micro-expansion shaft sleeve is divided into multiple pieces along the circumferential direction to form an expansion part, the inner wall of the micro-expansion shaft sleeve is arranged to be a conical inner wall surface, a taper sleeve matched with the conical inner wall surface in taper is arranged in an inner cavity of the micro-expansion shaft sleeve, the taper sleeve is connected to a connecting shaft, the connecting shaft is adjusted to move towards a small end of the conical inner wall surface, so that the taper 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 a cutter to be processed is achieved, and the center adjustment assembly adjusts the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle by adjusting the abutting pressure between different jackscrews, thereby further ensuring the machining precision of the cutter. The invention also discloses a machining center with the adjustable center clearance-eliminating cutter bar.
Description
Technical Field
The invention belongs to the field of electric spark discharge machining, relates to a functional component of an electric spark cutter sharpening machine tool, and particularly relates to an adjustable center-clearance-eliminating cutter bar and a machining center.
Background
The polycrystalline diamond spiral cutter and the polycrystalline diamond corn cutter are tyre-shaped cutters with teeth made of polycrystalline diamond composite sheets, the hardness of the polycrystalline diamond is high, electric spark discharge is used for gradually embodying advantages in machining, in the machining process, the cutters are required to be installed on a machining cutter handle of a machine tool through cutter installation holes, and high machining precision is required by the polycrystalline diamond spiral cutter, so that high requirements are provided for installation of the spiral cutter during machining.
The traditional electric spark machine tool processing cutter comprises the following steps: the cutter is arranged on a cutter bar of a machine tool, and after the cutter is pressed by a gland, the cutter bar is rotated to drive the cutter to rotate so as to carry out electric discharge machining on teeth one by one. The diameter of the traditional cutter bar is fixed, so that the cutter bar diameter and the central aperture of the cutter are large in difference, the cutter is mounted on the cutter bar, the cutter and the cutter bar are in clearance fit, the actual circle center of the cutter is different from the circle center of the cutter bar after the cutter is tightly pressed, and the cutter is rotated at a high speed by taking the circle center of the cutter as the center when being used. This results in the center of rotation being not concentric during machining and use of the tool. The cutter is machined through the rotary cutter bar, the circle center of the excircle after the cutter is machined is actually the circle center of the cutter bar, and is not the circle center of the cutter, and the radial runout precision of the cutter after machining is influenced by the clearance fit between the cutter and the cutter bar. For a helical blade with high machining accuracy, this effect cannot meet the machining requirement with high accuracy.
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, easiness in damage, easiness in radial jump to out of tolerance and incapability of adjusting after out of tolerance.
Disclosure of Invention
The invention aims to provide an adjustable center clearance-eliminating cutter bar and a machining center, which can eliminate clearance fit between a cutter and the cutter bar when the cutter and the cutter bar are installed, and can eliminate the influence of the clearance fit on the radial runout machining precision of the cutter, so as to realize concentricity adjustment, and solve the problems that the existing hydraulic expansion sleeve is easy to jump to out of tolerance in the radial direction and cannot be adjusted after the out of tolerance.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides an adjustable center clearance-eliminating cutter bar, which comprises:
the first end of the cutter bar tail handle is used for being connected with a machine tool, and the center of the end face of the second end of the cutter bar tail handle is provided with an adjusting shaft coaxial with the cutter bar tail handle;
the inner wall surface of the micro-expansion shaft sleeve 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, the small end of the conical inner wall surface is positioned at the second end of the micro-expansion shaft sleeve, and the outer wall of the micro-expansion shaft sleeve is used for sleeving a cutter to be processed; a plurality of slits extending along the axial direction of the first end side wall of the micro-expansion shaft sleeve are formed in the side wall of the first end of the micro-expansion shaft sleeve, and the slits are distributed at intervals along the circumferential direction of the micro-expansion shaft sleeve so as to divide the first end of the micro-expansion shaft sleeve into multiple petals along the circumferential direction to form an expansion part; the second end of the micro-expansion shaft sleeve is provided with a connecting flange in butt joint with the second end of the cutter bar tail handle, 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 adjusting shaft is sleeved in the through hole;
the aligning assembly comprises a plurality of jackscrews which are in threaded connection with the connecting flange, wherein the jackscrews are uniformly distributed along the circumferential direction of the aligning shaft, any jackscrew is arranged along the radial direction of the aligning shaft, and the bottom end of any jackscrew can penetrate through the radial side wall of the connecting flange and extend into the through hole to be abutted with the aligning shaft; the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle can be adjusted by adjusting different abutting pressure between the jackscrews and the adjusting shaft;
the gap eliminating assembly comprises a connecting shaft and a taper sleeve sleeved on the periphery of the connecting shaft, the first end of the connecting shaft penetrates through the micro-expansion shaft sleeve and is in threaded connection with the second end of the cutter bar tail handle, the taper sleeve is positioned in the micro-expansion shaft sleeve, the outer wall surface of the taper sleeve is a conical outer wall surface matched with the conical inner wall surface, threads are screwed into the connecting shaft, and the expansion part can be radially and uniformly expanded through the taper sleeve so as to eliminate gaps between the micro-expansion shaft sleeve and a cutter to be machined.
Optionally, the second end of the cutter bar tail handle is connected with the connecting flange through a screw.
Optionally, a plurality of jacks for inserting the jackscrews are formed in the outer wall of the mandrel, any one of the jacks is arranged along the radial direction of the mandrel, and the depths of any two of the jacks are the same.
Optionally, the gap is a strip-shaped uniform gap, and a circular opening communicated with the strip-shaped uniform gap is formed in the side wall of the second end of the micro-expansion shaft sleeve.
Optionally, four gaps are arranged at intervals in the circumferential direction of the micro-expansion shaft sleeve.
Optionally, the first end of the connecting shaft is further sleeved with a retainer ring, and the retainer ring abuts against the end part 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 adjustable center clearance-eliminating cutter bar according to any one of claims 1-7, wherein the first end of the cutter bar tail handle is connected with the machine tool, the pressing block is connected with the second end of the connecting shaft, and the pressing block is used for pressing the cutter to be machined sleeved on the periphery of the micro-expansion shaft sleeve.
Optionally, 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.
Optionally, the tool also comprises a gauge which can be sleeved outside the micro-expansion shaft sleeve, and the gauge is used for detecting concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle.
Compared with the prior art, the invention has the following technical effects:
the adjustable center-adjusting 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 multiple lobes along the circumferential direction to form the expansion part, the inner wall of the micro-expansion shaft sleeve is arranged to be a conical inner wall surface, the inner cavity of the micro-expansion shaft sleeve is provided with a taper sleeve matched with the conical inner wall surface in taper, the taper sleeve is connected to the connecting shaft, after the cutter to be machined is sleeved outside the micro-expansion shaft sleeve, the connecting shaft is adjusted to move towards the small end of the conical inner wall surface, so that the taper 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 radial runout is out of tolerance is thoroughly solved, and the machining requirement of the high-precision cutter is met.
Meanwhile, the centering component is arranged, and the centering component is used for supporting the periphery of the adjusting mandrel on the cutter bar tail handle by arranging the jackscrews on the connecting flange of the micro-expansion shaft sleeve, so that the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle can be adjusted by adjusting the abutting pressure between different jackscrews and the adjusting mandrel, the centering can be carried out once after each time of clearance elimination adjustment, the defect that the cutter cannot be adjusted after the radial jump is out to be out of tolerance is avoided, and the machining precision of the cutter is further ensured.
The machining center provided by the invention is provided with the pressing block for pressing the cutter to be machined and the checking fixture for detecting concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle, wherein the pressing block and the checking fixture are of detachable structures, the pressing block is mainly used in cutter machining, and the checking fixture is used before or after the cutter machining, so that the cutter machining process can be smoothly and efficiently carried out, and the machining precision of the cutter is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an adjustable anti-backlash cutter bar according to an embodiment of the present invention;
FIG. 2 is a schematic view of a structure of a shank of a tool bar according to an embodiment of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a schematic view of a micro-expanding sleeve according to an embodiment of the present invention;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a schematic structural view of a connecting shaft according to an embodiment of the present invention;
FIG. 7 is a schematic view of a cone sleeve according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a retainer ring according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a reducer sleeve (gauge) according to an embodiment of the present invention.
Wherein, the reference numerals are as follows:
100. the cutter bar can adjust the center and eliminate gaps;
1. a cutter bar tail handle; 2. an adjusting shaft; 3. a micro-expansion shaft sleeve; 4. a slit; 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 center hole; 18. and (3) a threaded hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide an adjustable center clearance-eliminating cutter bar, which can eliminate clearance fit between a cutter and the cutter bar when the cutter and the cutter bar are installed, and can eliminate the influence of the clearance fit on the radial runout machining precision of the cutter, so as to realize concentricity adjustment, and solve the problems that the existing hydraulic expansion sleeve is easy to radially jump to be out of tolerance and cannot be adjusted after the out of tolerance.
The invention also aims to provide a machining center with the adjustable center clearance-eliminating cutter bar.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1 to 9, the present embodiment provides an adjustable center 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 of a second end face of the cutter bar tail handle 1 is provided with a center adjusting shaft 2 coaxial with 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 processed; the side wall of the first end of the micro-expansion shaft sleeve 3 is provided with a plurality of slits 4 extending along the axial direction of the micro-expansion shaft sleeve 3, and the slits 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 petals along the circumferential direction to form an expansion part; the second end of the micro-expansion shaft sleeve 3 is provided with a connecting flange 5 which is in butt joint with the second end of the cutter bar tail handle 1, the center of the connecting flange 5 is provided with a through hole 6 which is coaxial with and communicated with the micro-expansion shaft sleeve 3, the aperture of the through hole 6 is larger than the outer diameter of the micro-expansion shaft sleeve 3, the spindle 2 is sleeved in the through hole 6, and preferably, the spindle 2 and the through hole 6 are in clearance fit; the aligning assembly comprises a plurality of jackscrews which are in threaded connection with the connecting flange 5, the jackscrews are uniformly distributed along the circumferential direction of the aligning shaft 2, any jackscrew is arranged along the radial direction of the aligning shaft 2, and the bottom end of any jackscrew can penetrate through the radial side wall of the connecting flange 5 and extend into the through hole 6 to be abutted with the aligning shaft 2; the concentricity between the micro-expansion shaft sleeve 3 and the cutter arbor tail handle 1 can be adjusted by adjusting the abutting pressure between different jackscrews and the adjusting shaft 2; the clearance eliminating assembly comprises a connecting shaft 8 and a taper sleeve 9 sleeved on the periphery of the connecting shaft 8, the first end of the connecting shaft 8 is arranged in the micro-expansion shaft sleeve 3 in a penetrating mode and is in threaded connection with the second end of the cutter bar tail handle 1, the taper sleeve 9 is located in the micro-expansion shaft sleeve 3, the outer wall surface of the taper sleeve 9 is a conical outer wall surface matched with the conical inner wall surface, and the thread screwing-in connecting shaft 8 can radially and uniformly expand the expansion part through the taper sleeve 9 so as to eliminate a gap between the micro-expansion shaft sleeve 3 and a cutter to be machined. The adjustable anti-backlash cutter bar 100 can eliminate the influence of clearance fit on the radial runout machining precision of the cutter and realize concentricity adjustment.
In this embodiment, the connecting flange 5 is a connecting portion located at the outer edge of the end portion of the micro-expansion shaft sleeve 3, and is not generally referred to as a conventional flange structure, and may be a continuous ring structure of a conventional flange or a manner of distributing lugs at intervals. As a preferred manner, the connecting flange 5 of the present embodiment is a continuous ring structure of a conventional flange, as shown in fig. 5, on which 8 threaded holes 18 are uniformly distributed, 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, the jackscrew mounting holes 7 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 on the transverse section of the connecting flange 5, one jackscrew mounting hole 7 is arranged every two threaded holes 18 at intervals, as shown in fig. 5. Correspondingly, the second end of the cutter bar tail 1 can be provided with another flange structure which is in butt joint with the connecting flange 5, the other flange structure is uniformly provided with 8 other threaded holes 18 along the circumference of the other flange structure, the threaded holes 18 on the other flange structure are aligned with the threaded holes 18 on the connecting flange 5, and the connection of the flange structure of the second end of the cutter bar tail 1 with the connecting flange 5 can be realized through the screws 10, so that the micro-expansion shaft sleeve 3 is fixed on the cutter bar tail 1.
In this embodiment, the outer wall of the mandrel 2 is provided with a plurality of jacks 11 into which the jackscrews are inserted, any one of the jacks 11 is arranged along the radial direction of the mandrel 2, and the depth of any two jacks 11 is the same. After the micro-expansion shaft sleeve 3 is fixed to the cutter bar tail handle 1 through the screw 10, the jackscrew mounting holes 7 on the connecting flange 5 are aligned with the insertion holes 11 on the mandrel 2 one by one, so that jackscrews can pass through in sequence, and the jackscrews are inserted into the bottoms of the insertion holes 11, so that the jacking of the jackscrews on the mandrel 2 is realized.
In this embodiment, four slits 4 are uniformly formed at the first end of the micro-expansion sleeve 3 along the circumferential direction thereof. The slit 4 is a strip-shaped uniform slit, and a circular opening 12 communicated with the strip-shaped uniform slit 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 retainer ring 13, and the retainer ring 13 abuts against the end of the taper sleeve 9. The check 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 arbor tail handle 1, and the check ring 13 can drive the taper sleeve 9 to be taken out from the first end of the micro-expansion shaft sleeve 3 together. When the cutter bar is installed, the tip 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, the gasket 14 is sleeved on the connecting shaft 8, and after the connecting shaft 8 is installed in place, the gasket 14 is positioned between the head of the connecting shaft 8 and the taper sleeve 9. Wherein the gasket 14 is preferably a quenched gasket.
The working principle of the adjustable anti-backlash cutter bar 100 according to the present embodiment is specifically described below.
The cutter bar tail handle 1 is connected with the micro-expansion shaft sleeve 3 through a screw 10, four adjusting holes (namely, jackscrew mounting holes 7) provided with jackscrews are formed in the micro-expansion shaft sleeve 3, the jackscrews are propped against the periphery of an adjusting shaft of the cutter bar tail handle 1, four gaps 4 are cut in the shaft sleeve part of the micro-expansion shaft sleeve 3, two withdrawal operation holes are further formed in the cutter bar tail handle, a retainer ring 13 and a taper sleeve 9 are sequentially arranged in the micro-expansion shaft sleeve 3, a connecting shaft 8 (namely, a threaded shaft) sleeved with a gasket 14 penetrates through the taper sleeve 9 and the retainer ring 13, and threads are arranged on a top hole 17 of the cutter bar tail handle 1. The periphery of the retainer ring 13 is provided with two concave end set screws which are aligned with the withdrawal operation holes of the micro-expansion shaft sleeve 3, a cutter to be processed is sleeved on the micro-expansion shaft sleeve 3, the pressing block 15 is mounted on the connecting shaft 8 (namely the threaded shaft) through screws or bolts, and at the moment, the two ends of the cutter to be processed are respectively propped against the pressing block 15 and the connecting flange 5, so that axial movement in the processing process is avoided. The concentricity of the cutter arbor tail handle 1 and the micro-expansion shaft sleeve 3 can be adjusted by adjusting four jackscrews on the micro-expansion shaft sleeve 3, and the radial runout of the micro-expansion shaft sleeve 3 can be adjusted.
To take out the taper sleeve 9, two concave end set screws on the retainer ring 13 can be screwed down, so that the retainer ring 13 is connected with the connecting shaft 8 (i.e. the threaded shaft), the retainer ring 13 can be driven to withdraw through loosening the connecting shaft 8 (i.e. the threaded shaft), the taper sleeve 9 is driven to withdraw, and the taper sleeve 9 is taken out. When the 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 the threaded shaft), so that a gap between the micro-expansion shaft sleeve 3 and the cutter mounting hole can be eliminated. After eliminating the gap, the screw knife is pressed by the pressing block 15.
Therefore, the adjustable center-clearance-eliminating cutter bar provided by the embodiment is novel and reasonable in structure, the first end of the micro-expansion shaft sleeve is divided into multiple pieces along the circumferential direction to form the expansion part, the inner wall of the micro-expansion shaft sleeve is arranged to be the conical inner wall surface, the inner cavity of the micro-expansion shaft sleeve is provided with the taper sleeve matched with the conical inner wall surface in taper, the taper sleeve is connected to the connecting shaft, after the 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, the expansion part of the micro-expansion shaft sleeve is extruded by the taper 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 radial runout jumps to out of the ultra-poor is thoroughly solved, and the machining requirement of the high-precision cutter is met.
Meanwhile, the adjustable center clearance-eliminating cutter bar provided by the embodiment is provided with the center adjusting assembly, the center adjusting assembly is used for propping the periphery of the cutter bar tail handle upper adjusting shaft through the jackscrews arranged on the connecting flange of the micro-expansion shaft sleeve, the abutting pressure between different jackscrews and the adjusting shaft is adjusted, the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle is adjusted, the center adjusting can be carried out once after clearance elimination adjustment every time, the defect that the cutter cannot be adjusted after the radial jump is out to be out of tolerance is avoided, and the machining precision of the cutter is further guaranteed.
Example two
The embodiment provides a machining center, which comprises a machine tool, a pressing block 15 and the adjustable clearance-eliminating cutter bar 100 as in the first embodiment, wherein a first end of a cutter bar tail handle 1 is connected to the machine tool, the pressing block 15 is connected to a second end of a connecting shaft 8, and is used for pressing a cutter to be machined sleeved on the periphery of a micro-expansion shaft sleeve 3. As shown in fig. 1, the pressing block 15 is preferably an index head pressing plate, which is connected to the second end of the connecting shaft 8, i.e., the head of the connecting shaft 8, by a bolt.
In this embodiment, the tool 16 is a conventional reducing sleeve (or referred to as "tool sleeve") and the tool 16 is sleeved outside the micro-expansion sleeve 3 before the tool is sleeved on the micro-expansion sleeve 3, so as to detect concentricity between the micro-expansion sleeve 3 and the tool bar tail handle 1. When the gauge 16 is used, a reducing sleeve (or called a gauge sleeve) is sleeved on the micro-expanding shaft sleeve 3 and then is pressed by a pressing block 15. By checking the radial jump of the reducer sleeve (or called as a 'checking fixture sleeve'), the four jackscrews on the micro-expansion shaft sleeve 3 are adjusted, so that the concentricity of the reducer sleeve (or called as a 'checking fixture sleeve') and the cutter arbor tail handle 1 can be realized, then the screw 10 connected between the cutter arbor tail handle 1 and the micro-expansion shaft sleeve 3 is locked, the concentricity of the cutter arbor tail handle 1 and the micro-expansion shaft sleeve 3 can be realized, and then the reducer sleeve (or called as a 'checking fixture sleeve') is taken down. Then the cutter to be processed can be sleeved on the micro-expansion shaft sleeve 3 for cutter processing. When the cutter is machined, the 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 the threaded shaft), so that a gap between the micro-expansion shaft sleeve 3 and the cutter mounting hole can be eliminated. After eliminating the gap, the cutter (such as a screw cutter) is pressed by the pressing block 15.
The machining center that this embodiment provided has disposed for the adjustable centre clearance cutter arbor and has been used for compressing tightly the briquetting of waiting to process the cutter and be used for detecting the utensil of examining of concentricity between little expanding sleeve and the cutter arbor tail handle, and briquetting and examine the utensil and be detachable construction, the briquetting mainly uses in cutter processing, examines the utensil and uses before cutter processing or after processing finishes for cutter course of working can go on smoothly high-efficiently, is favorable to guaranteeing the machining precision of cutter.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics 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.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. An adjustable anti-backlash cutter bar, comprising:
the first end of the cutter bar tail handle is used for being connected with a machine tool, and the center of the end face of the second end of the cutter bar tail handle is provided with an adjusting shaft coaxial with the cutter bar tail handle;
the inner wall surface of the micro-expansion shaft sleeve 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, the small end of the conical inner wall surface is positioned at the second end of the micro-expansion shaft sleeve, and the outer wall of the micro-expansion shaft sleeve is used for sleeving a cutter to be processed; a plurality of slits extending along the axial direction of the first end side wall of the micro-expansion shaft sleeve are formed in the side wall of the first end of the micro-expansion shaft sleeve, and the slits are distributed at intervals along the circumferential direction of the micro-expansion shaft sleeve so as to divide the first end of the micro-expansion shaft sleeve into multiple petals along the circumferential direction to form an expansion part; the second end of the micro-expansion shaft sleeve is provided with a connecting flange in butt joint with the second end of the cutter bar tail handle, 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 adjusting shaft is sleeved in the through hole;
the aligning assembly comprises a plurality of jackscrews which are in threaded connection with the connecting flange, wherein the jackscrews are uniformly distributed along the circumferential direction of the aligning shaft, any jackscrew is arranged along the radial direction of the aligning shaft, and the bottom end of any jackscrew can penetrate through the radial side wall of the connecting flange and extend into the through hole to be abutted with the aligning shaft; the concentricity between the micro-expansion shaft sleeve and the cutter bar tail handle can be adjusted by adjusting different abutting pressure between the jackscrews and the adjusting shaft;
the gap eliminating assembly comprises a connecting shaft and a taper sleeve sleeved on the periphery of the connecting shaft, the first end of the connecting shaft penetrates through the micro-expansion shaft sleeve and is in threaded connection with the second end of the cutter bar tail handle, the taper sleeve is positioned in the micro-expansion shaft sleeve, the outer wall surface of the taper sleeve is a conical outer wall surface matched with the conical inner wall surface, threads are screwed into the connecting shaft, and the expansion part can be radially and uniformly expanded through the taper sleeve so as to eliminate gaps between the micro-expansion shaft sleeve and a cutter to be machined.
2. The adjustable anti-backlash tool holder according to claim 1, wherein the second end of the tool holder shank is connected to the connecting flange by means of screws.
3. The center-adjustable anti-backlash cutter bar according to claim 1, wherein a plurality of insertion holes for inserting the jackscrews are formed in the outer wall of the center-adjustable shaft, any one of the insertion holes is arranged along the radial direction of the center-adjustable shaft, and the depth of any two insertion holes is the same.
4. The adjustable centering and gap-eliminating cutter bar according to claim 1, wherein the gap is a strip-shaped uniform gap, and a circular opening communicated with the strip-shaped uniform gap is formed in the side wall of the second end of the micro-expansion shaft sleeve.
5. The adjustable center and gap elimination bar according to claim 1 or 4, wherein four gaps are arranged at intervals in the circumferential direction of the micro-expansion shaft sleeve.
6. The adjustable anti-backlash cutter arbor according to claim 1, wherein the first end of the connecting shaft is further sleeved with a retainer ring, and the retainer ring abuts against the end of the taper sleeve.
7. The adjustable anti-backlash cutter arbor according to claim 1 or 6, characterized in that 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.
8. A machining center, which is characterized by comprising a machine tool, a pressing block and the adjustable center clearance-eliminating cutter bar according to any one of claims 1-7, wherein a first end of a cutter bar tail handle is connected with the machine tool, the pressing block is connected with a second end of a connecting shaft, and the pressing block is used for pressing the cutter to be machined sleeved on the periphery of the micro-expansion shaft sleeve.
9. The machining center of claim 8, wherein the press block is an index head platen that is bolted to the second end of the connecting shaft.
10. The machining center according to claim 8 or 9, further comprising a gauge capable of being sleeved outside the micro-expanding sleeve, the gauge being configured to detect concentricity between the micro-expanding sleeve and the shank bar tail.
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| 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210501068.2A CN114833365B (en) | 2022-05-09 | 2022-05-09 | Center-adjustable clearance-eliminating cutter bar and machining center |
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| CN114833365B true CN114833365B (en) | 2023-09-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007121664A1 (en) * | 2006-04-18 | 2007-11-01 | Shoushan Qiu | A fine adjusting method of the feed amount of the boring cutter and the adjusting device thereof |
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2022
- 2022-05-09 CN CN202210501068.2A patent/CN114833365B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN114833365A (en) | 2022-08-02 |
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