CN204725193U - A kind of BT handle of a knife high-speed cutting mechanism - Google Patents
A kind of BT handle of a knife high-speed cutting mechanism Download PDFInfo
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- CN204725193U CN204725193U CN201520459395.1U CN201520459395U CN204725193U CN 204725193 U CN204725193 U CN 204725193U CN 201520459395 U CN201520459395 U CN 201520459395U CN 204725193 U CN204725193 U CN 204725193U
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Abstract
The utility model discloses a kind of BT handle of a knife high-speed cutting mechanism, belong to numerical control machine tool cutting processing technique field.It comprises BT handle of a knife, main shaft, tool-broaching mechanism, blind rivet and cushion cover, the end face of the non-Cutting tool installation manner end of BT handle of a knife is handle of a knife rear end face, the center of handle of a knife rear end face is provided with the frustum of a cone, blind rivet is installed on the center of frustum of a cone end face, main shaft is hollow shaft, the end face of main shaft near handle of a knife rear end face one end is front-end of spindle face, centre, front-end of spindle face is provided with taper hole, shape and the frustum of a cone of taper hole match, the frustum of a cone is installed in taper hole, cushion cover is arranged between handle of a knife rear end face and front-end of spindle face, tool-broaching mechanism is installed in alignment of shafts cavity, tool-broaching mechanism and the clamping of blind rivet phase.The utility model makes BT handle of a knife achieve high-speed cutting, and contact stiffness and the repetitive positioning accuracy of BT handle of a knife are high, high-speed cutting machining accuracy and efficiency high, improve cutter and lathe service life, and can substitute the use of HSK handle of a knife.
Description
Technical field
The utility model belongs to numerical control machine tool cutting processing technique field, more particularly, relates to a kind of BT handle of a knife high-speed cutting mechanism.
Background technology
High-speed cutting processing is that 21 century a kind of integrates efficient, high-quality, low consumption advanced manufacturing technology, in conventional machining, enjoy the series of problems of puzzlement, the application of being processed by high-speed cutting is resolved.High-speed cutting processing is not only the raising of the speed of mainshaft, and requires that cutting tool system has very high rigidity, security, flexibility, dynamic balance property and operation convenience; Simultaneously, to the chucking power of cutter and clamp precision etc., very high requirement is proposed to the coupling stiffness of tooling system and lathe interface, precision and handle of a knife, handle of a knife system rigidity deficiency will cause tooling system to be vibrated or tilt, machining accuracy and working (machining) efficiency are reduced, and system vibration can make tool wear aggravate, reduce cutter and lathe service life.Vertical machining centre main shaft handle of a knife domestic at present all adopts BT handle of a knife, BT handle of a knife loads in spindle taper hole, BT handle of a knife is strained by the blind rivet be connected with BT handle of a knife by tool-broaching mechanism, the conical surface of BT handle of a knife is made tightly to be pressed on spindle taper hole face, thus make BT handle of a knife locate clamping on main shaft, but along with improving constantly of machining center cutting speed, due to the effect of centrifugal force, all there is radial dilatation in the taper shank of spindle taper hole and handle of a knife, when taper shank amount of expansion is less than spindle taper hole amount of expansion, fit clearance is there is between taper shank and spindle taper hole, so, under the effect of stretching screw tightening force, the axial displacement of taper shank carry its tools, cutter axial location precision when High-speed machining is caused to reduce, meanwhile, during high-speed cutting, handle of a knife can produce very large centrifugal force, knife bar can be caused to bend and produce vibrations, and its result will cause part to be processed quality to reduce, and even cause tool damage.
As China Patent Publication No. CN 201239805, publication date on May 20th, 2009, disclosed a kind of pop rivet type universal main spindle, it comprises main shaft, pull bar is provided with in main shaft medium pore, pull bar arranges disk spring, and pull bar front end is arranged in claw, and engages with claw tension-type, the rear end of a blind rivet is arranged in claw, and engage with claw tension-type, blind rivet front end is threaded with handle of a knife, and handle of a knife is connected with main shaft.This application case changes the connected mode of main shaft and blind rivet, main shaft can be supported the use with the blind rivet of JT handle of a knife, BT handle of a knife etc. simultaneously, increase handle of a knife interchangeability, decrease amount of parts, but the handle of a knife of this application case and main shaft are still compressed by the conical surface to be connected, handle of a knife high-speed cutting adds man-hour, there is above-mentioned cutter shaft low to positioning precision, the bending vibrations of knife bar and the low-quality problem of processing parts.
And for example China Patent Publication No. CN 203779180 U, publication date on August 20th, 2014, disclosed a kind of horizontal Machining centers clamping mechanism for knife handle, it comprises hollow shaft, pumping rod, tapered sleeve, blind rivet, sleeve and drive source, axis hole through before and after described hollow shaft offers, described pumping rod, tapered sleeve, blind rivet and sleeve are all arranged in described axis hole, described pumping rod, tapered sleeve is connected to front by rear successively with blind rivet, described sleeve is arranged on the front end of hollow shaft, handle of a knife is by being connected with the front end of blind rivet behind sleeve location, the rear end of pumping rod is stretched out hollow shaft and is connected with drive source, the sidewall of tapered sleeve front end is provided with at least two rotating steel balls, the diameter of this steel ball is greater than the thickness of tapered sleeve sidewall, and run through the setting of tapered sleeve sidewall, the rear end of described blind rivet is provided with the positioning convex ring that can be fastened on steel ball place, the rear end of blind rivet is connected on the steel ball of tapered sleeve front end by this positioning convex ring.This application case is the connected mode by changing clamping mechanism for knife handle and blind rivet, improve reliability and the flexibility of handle of a knife clamping, enhance the exchange performance of component of machine, but it is same, the fit system of handle of a knife and main shaft is still by conical surface compression fit, cutter shaft is low to positioning precision, adds man-hour in high-speed cutting, and knife bar bends vibrations and low etc. the problem of processing parts quality cannot be avoided.
HSK handle of a knife compared with BT handle of a knife, larger moment of flexure, moment of torsion and the maximum speed that can bear, but their structure is different, also different from the connected mode of main shaft, so cannot use on the machining center adopting BT handle of a knife.In prior art, also someone manages to adopt intermediate conversion device, the machining center of employing BT handle of a knife is enable to use HSK handle of a knife, as China Patent Publication No. CN 204019226 U, a kind of patent of HSK handle of a knife joint universal converting device disclosed in 17 days December in 2014 of publication date, just achieve above-mentioned conversion, but the joint conversion sleeve of this conversion equipment and machine tool chief axis are still compressed by cone match to be connected, this kind of connected mode adds to high-speed cutting the problem that man-hour, handle of a knife brought and still cannot avoid, in addition, the use of conversion equipment also reduces Cutting Stiffness and the positional precision of cutter, too increase the quantity of unnecessary parts.
High-speed cutting processing has become the important link of machining manufacturing technology, the processing characteristics of traditional BT handle mechanism has been difficult to the requirement meeting high-speed cutting, under the prerequisite not changing current machining center equipment, be badly in need of a kind of BT handle of a knife high-speed cutting mechanism of design, meet the demand of BT handle of a knife high-speed cutting processing.
Summary of the invention
The problem that 1, will solve
For BT handle of a knife in prior art, axial location precision is low when High-speed machining, processing parts is of poor quality and the flimsy problem of cutter, the invention provides a kind of BT handle of a knife high-speed cutting mechanism, BT handle of a knife is made to realize high-speed cutting, and high-speed cutting adds man-hour, contact stiffness and the repetitive positioning accuracy of BT handle of a knife are high, and high-speed cutting processing characteristics is reliable; Meanwhile, the radial handle of a knife navigation system of enclosed construction avoids knife bar vibration and tilts, and improves machining accuracy and efficiency, reduces tool wear, improves cutter and lathe service life.
2, technical scheme
For solving the problem, the utility model adopts following technical scheme.
A kind of BT handle of a knife high-speed cutting mechanism, comprise BT handle of a knife, main shaft, tool-broaching mechanism, blind rivet, and cushion cover, the end face of the non-Cutting tool installation manner end of described BT handle of a knife is handle of a knife rear end face, the center of handle of a knife rear end face is provided with the frustum of a cone, and described blind rivet is installed on the center of frustum of a cone end face; Described main shaft is hollow shaft, and the end face of main shaft near handle of a knife rear end face one end is front-end of spindle face, and centre, front-end of spindle face is provided with taper hole, and shape and the frustum of a cone of taper hole match, and the frustum of a cone is installed in taper hole; Described cushion cover is arranged between handle of a knife rear end face and front-end of spindle face; Described tool-broaching mechanism is installed in alignment of shafts cavity, tool-broaching mechanism and the clamping of blind rivet phase.
Preferentially, the thickness of described cushion cover is L,
l>k, wherein, E is the elastic modelling quantity of cushion cover, and A is the face area of cushion cover, and k is the spacing in handle of a knife rear end face and front-end of spindle face, and β is the tapering of the frustum of a cone, F
maxfor the working pulling force of tool-broaching mechanism.
Preferentially, the material of described cushion cover is 40CrNi.
Preferentially, described L-k=0.006 ~ 0.009mm.
Preferentially, described β=7:24, F
max=9000 ~ 12000N.
Preferentially, described blind rivet and the frustum of a cone are threaded connection.
3, beneficial effect
Compared to prior art, the beneficial effects of the utility model are:
(1) the BT handle of a knife of a kind of BT handle of a knife high-speed cutting mechanism of the present utility model and the main shaft mode that adopts the conical surface and end face to be simultaneously located by connecting, improve contact stiffness and the repetitive positioning accuracy of BT handle of a knife, clamping reliability, makes BT handle of a knife can be used for high-speed cutting processing; The radial location handle mechanism of this kind of enclosed construction, under the pulling force effect of tool-broaching mechanism, on the whole conical surface and supporting end face, friction is produced between handle of a knife and main shaft, knife bar vibration and tilt problem are eliminated, improve machining accuracy and working (machining) efficiency, meanwhile, reduce tool wear, improve cutter and lathe service life;
(2) a kind of BT handle of a knife high-speed cutting mechanism of the present utility model, we find unexpectedly, when cushion cover thickness be L under special circumstances, namely
time, under the tool-broaching mechanism working pulling force that the work in-process heart is certain, both enough handle of a knife end face thrusts had been ensured, also enough BT handle of a knife conical surface thrusts can just be ensured, locate while achieving the conical surface and end face, the rigidity of mechanism and location accuracy reach best in these cases, make handle of a knife can well adapt to high-speed cutting processing, and handle of a knife and cutting-tool's used life long;
(3) ticking material of a kind of BT handle of a knife high-speed cutting mechanism of the present utility model adopts 40CrNi, in employing the utility model specific tool-broaching mechanism working pulling force situation, the consistency and elasticity modulus of this material meets thickness formula of the present utility model just, simultaneously under this pulling force, BT handle of a knife, face frictional force between cushion cover and front-end of spindle face, the rigidity of BT handle of a knife high-speed cutting processing and the requirement of rotating speed just in time can be met when weight is the lightest, reduce the shearing force that cushion cover bears, especially can avoid the fatigue of cushion cover, and cost is minimum;
(4) a kind of cushion cover Thickness Ratio handle of a knife rear end face of BT handle of a knife high-speed cutting mechanism of the present utility model and the large 0.006 ~ 0.009mm of spacing in front-end of spindle face, this magnitude of interference obtains under the working pulling force of the tool-broaching mechanism of respective settings, can well when ensureing shearing force realize the conical surface of BT handle of a knife and main shaft and end face and is located by connecting mode minimum simultaneously, ensure that BT handle of a knife has enough contact stiffness, BT handle of a knife rocks little, machining accuracy is high, simultaneously, the tapering of the frustum of a cone is 7:24, identical with existing BT handle of a knife tapering, ensure the versatility of handle of a knife;
(5) blind rivet of a kind of BT handle of a knife high-speed cutting mechanism of the present utility model and the frustum of a cone are threaded connection, easy accessibility;
(6) a kind of BT handle of a knife high-speed cutting mechanism of the present utility model alternative HSK type handle of a knife uses, and reduces valuable handle of a knife use cost, and structure is simple, reasonable in design, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is configuration diagram of the present invention.
In figure: 1, BT handle of a knife; 2, cushion cover; 3, main shaft; 4, tool-broaching mechanism; 5, blind rivet; 6, front-end of spindle face; 7, handle of a knife rear end face; 8, the frustum of a cone.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the utility model is described further.
Embodiment 1
As shown in Figure 1, a kind of BT handle of a knife high-speed cutting mechanism of the present embodiment, comprise BT handle of a knife 1, main shaft 3, tool-broaching mechanism 4, blind rivet 5 and cushion cover 2, the end face of the non-Cutting tool installation manner end of BT handle of a knife 1 is handle of a knife rear end face 7, the center of handle of a knife rear end face 7 is provided with the frustum of a cone 8, and blind rivet 5 is threaded connection the center in the frustum of a cone 8 end face; Main shaft 3 is hollow shaft, and the end face of main shaft 3 near handle of a knife rear end face 7 one end is front-end of spindle face 6, and centre, front-end of spindle face 6 is provided with taper hole, and shape and the frustum of a cone 8 of taper hole match, and the frustum of a cone 8 is installed in taper hole; Cushion cover 2 is arranged between handle of a knife rear end face 7 and front-end of spindle face 6, and in the present embodiment, the material of cushion cover 2 is 40CrNi, and tool-broaching mechanism 4 is installed in main shaft 3 center cavity, tool-broaching mechanism 4 and the clamping of blind rivet 5 phase.
In the present embodiment, the material of cushion cover 2 is 40CrNi, and its elastic modulus E=210000MPa gets the internal diameter 44mm of cushion cover 2, external diameter 64mm, then the face area A=1696.46mm of cushion cover 2
2, use slip gauge to measure the spacing k=4mm in handle of a knife rear end face 7 and front-end of spindle face 6, the tapering β=7:24 of the frustum of a cone 8 of BT handle of a knife 1, according to the running parameter of machining center, gets the working pulling force F of tool-broaching mechanism 4
max=9000N, so the thickness of cushion cover 2 is
bring above-mentioned known quantity into and can obtain L=4.006mm, the i.e. Thickness Ratio handle of a knife rear end face 7 of cushion cover 2 and the large L-k=0.006mm of spacing in front-end of spindle face 6, this thickness of cushion cover 2 can make its anti-fatigue ability improve 30% than conventional cutting mechanism when this spacing.
The using method of a kind of BT handle of a knife high-speed cutting mechanism of the present embodiment, its step is as follows:
A blind rivet 5 is installed on BT handle of a knife 1 by (), and loaded by BT handle of a knife 1 in the taper hole of main shaft 3, and tool-broaching mechanism 4 pulls BT handle of a knife 1 to move along main shaft 3 axis direction by blind rivet 5, and the conical surface of the conical surface of the frustum of a cone 8 on BT handle of a knife 1 and main shaft 3 taper hole is fitted;
B () uses slip gauge to measure and records the spacing of handle of a knife rear end face 7 to front-end of spindle face 6, from the above, in the present embodiment, measured value is 4mm, then unclamps tool-broaching mechanism 4, and takes out BT handle of a knife 1;
C () calculates the thickness L of cushion cover 2, from the above, and L=4.006mm;
D () is according to the result of calculation processing cushion cover 2 of step (c);
E cushion cover 2 cover in step (d) installs in the frustum of a cone 8 of BT handle of a knife 1 by (), and the handle of a knife rear end face 7 of cushion cover 2 end face and BT handle of a knife 1 is fitted;
F BT handle of a knife 1 in step (e) is installed in the taper hole of main shaft 3 by (), tool-broaching mechanism 4 pulls BT handle of a knife 1 to move along main shaft 3 axis direction by blind rivet 5, cushion cover 2 end face and front-end of spindle face 6 are fitted, on BT handle of a knife 1, the conical surface of the frustum of a cone 8 and the conical surface of main shaft 3 taper hole fit, wherein, the Changing Pattern of the tensile force f of tool-broaching mechanism 4 t is in time
wherein, 0≤t≤2s, F
max=9000N, controls according to this power, and when BT handle of a knife runs up, circular runout is little, and wearing and tearing reduce;
After (g) 2s, the tensile force f=F of tool-broaching mechanism 4
max, and remain unchanged, adjust main shaft 3 rotating speed to 40000r/min, the circular runout using amesdial to measure BT handle of a knife 1 is less than 0.001mm simultaneously;
H () main shaft 3 stall, waits for machining.
A kind of BT handle of a knife high-speed cutting mechanism of the present embodiment adopts the mode of the conical surface and end face Dual positioning, under the working pulling force effect of tool-broaching mechanism, the conical surface between BT handle of a knife and main shaft and end face support simultaneously and produce friction, the radial location of enclosed construction is provided, improve contact stiffness and the repetitive positioning accuracy of BT handle of a knife, reliable clamping, and eliminated knife bar vibration and tilt problem, improve machining accuracy and working (machining) efficiency, simultaneously, also reduce tool wear, improve cutter and lathe service life, BT handle of a knife improves 80% service life, the service life of lathe improves 75%.
Embodiment 2
Substantially the same manner as Example 1, difference is, the working pulling force F of tool-broaching mechanism 4
max=10000N, the cushion cover 2 thickness L=4.007mm obtained, i.e. the Thickness Ratio handle of a knife rear end face 7 of cushion cover 2 and the large L-k=0.007mm of spacing in front-end of spindle face 6, and the circular runout of BT handle of a knife 1 is less than 0.001mm, BT handle of a knife improves 77% service life, and the service life of lathe improves 65%.
Embodiment 3
Substantially the same manner as Example 1, difference is, the working pulling force F of tool-broaching mechanism 4
max=12000N, the cushion cover 2 thickness L=4.009mm obtained, i.e. the Thickness Ratio handle of a knife rear end face 7 of cushion cover 2 and the large L-k=0.009mm of spacing in front-end of spindle face 6, and the circular runout of BT handle of a knife 1 is less than 0.001mm, BT handle of a knife improves 73% service life, and the service life of lathe improves 72%.
Example described in the utility model is only be described preferred embodiment of the present utility model; not the utility model design and scope are limited; under the prerequisite not departing from the utility model design philosophy; the various distortion that this area engineers and technicians make the technical solution of the utility model and improvement, all should fall into protection domain of the present utility model.
Claims (6)
1. a BT handle of a knife high-speed cutting mechanism, comprise BT handle of a knife (1), main shaft (3), tool-broaching mechanism (4) and blind rivet (5), it is characterized in that: also comprise cushion cover (2), the end face of the non-Cutting tool installation manner end of described BT handle of a knife (1) is handle of a knife rear end face (7), the center of handle of a knife rear end face (7) is provided with the frustum of a cone (8), and described blind rivet (5) is installed on the center of the frustum of a cone (8) end face; Described main shaft (3) is hollow shaft, the end face of main shaft (3) near handle of a knife rear end face (7) one end is front-end of spindle face (6), front-end of spindle face (6) centre is provided with taper hole, the shape of taper hole and the frustum of a cone (8) match, and the frustum of a cone (8) is installed in taper hole; Described cushion cover (2) is arranged between handle of a knife rear end face (7) and front-end of spindle face (6); Described tool-broaching mechanism (4) is installed in main shaft (3) center cavity, tool-broaching mechanism (4) and blind rivet (5) phase clamping.
2. a kind of BT handle of a knife high-speed cutting mechanism according to claim 1, is characterized in that: the thickness of described cushion cover (2) is L,
l>k, wherein, E is the elastic modelling quantity of cushion cover (2), A is the face area of cushion cover (2), k is the spacing of handle of a knife rear end face (7) and front-end of spindle face (6), and β is the tapering of the frustum of a cone (8), F
maxfor the working pulling force of tool-broaching mechanism (4).
3. a kind of BT handle of a knife high-speed cutting mechanism according to claim 2, is characterized in that: the material of described cushion cover (2) is 40CrNi.
4. a kind of BT handle of a knife high-speed cutting mechanism according to claim 2, is characterized in that: described β=7:24, F
max=9000 ~ 12000N.
5. a kind of BT handle of a knife high-speed cutting mechanism according to claim 2, is characterized in that: described L-k=0.006 ~ 0.009mm.
6. according to a kind of BT handle of a knife high-speed cutting mechanism in claim 1-5 described in any one, it is characterized in that: described blind rivet (5) and the frustum of a cone (8) are threaded connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520459395.1U CN204725193U (en) | 2015-06-30 | 2015-06-30 | A kind of BT handle of a knife high-speed cutting mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520459395.1U CN204725193U (en) | 2015-06-30 | 2015-06-30 | A kind of BT handle of a knife high-speed cutting mechanism |
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| CN204725193U true CN204725193U (en) | 2015-10-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924136A (en) * | 2015-06-30 | 2015-09-23 | 江苏元利数控机床有限公司 | BT knife handle high-speed cutting mechanism and use method |
| CN108081003A (en) * | 2017-12-24 | 2018-05-29 | 芜湖洪金机床有限公司 | The manufacturing method of high-precision adjustable eccentric blade clamping apparatus |
| CN108555364A (en) * | 2018-03-07 | 2018-09-21 | 湖南工学院 | The tool system and application method that high-efficiency and precision for high-rate wireless LAN positions |
-
2015
- 2015-06-30 CN CN201520459395.1U patent/CN204725193U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104924136A (en) * | 2015-06-30 | 2015-09-23 | 江苏元利数控机床有限公司 | BT knife handle high-speed cutting mechanism and use method |
| CN108081003A (en) * | 2017-12-24 | 2018-05-29 | 芜湖洪金机床有限公司 | The manufacturing method of high-precision adjustable eccentric blade clamping apparatus |
| CN108555364A (en) * | 2018-03-07 | 2018-09-21 | 湖南工学院 | The tool system and application method that high-efficiency and precision for high-rate wireless LAN positions |
| CN108555364B (en) * | 2018-03-07 | 2019-05-14 | 湖南工学院 | The tool system and application method that high-efficiency and precision for high-rate wireless LAN positions |
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Effective date of registration: 20190627 Address after: 210000 C17 Building, No. 9 Kechuang Avenue, Zhongshan Science Park, Liuhe District, Nanjing City, Jiangsu Province Patentee after: JIANGSU YUANLI AVIA PRECISION MACHINE TOOL CO., LTD. Address before: 21 002 HI Block, 9th Floor, Jinling Royal Garden, 333 Taiping South Road, Nanjing City, Jiangsu Province Patentee before: JIANGSU YUANLI CNC MACHINE TOOL CO., LTD. |