CN202824770U - Cutter for discharging chip and reaming holes easily - Google Patents
Cutter for discharging chip and reaming holes easily Download PDFInfo
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- CN202824770U CN202824770U CN 201220443911 CN201220443911U CN202824770U CN 202824770 U CN202824770 U CN 202824770U CN 201220443911 CN201220443911 CN 201220443911 CN 201220443911 U CN201220443911 U CN 201220443911U CN 202824770 U CN202824770 U CN 202824770U
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Abstract
The utility model discloses a cutter for discharging chip and reaming holes easily. The cutter for discharging the chip and reaming the holes easily comprises a cutter handle and a cutter rod. A guiding stop ring is integrally arranged on a connecting portion between the cutter handle and the cutter rod. A groove for fixing a main blade is arranged on the middle part of a lower end face of the cutter rod. First L-shaped gaps are respectively arranged on two sides of the groove for fixing the main blade located on the lower end face of the cutter rod. The main blade is arranged in the groove for fixing the main blade. Main cutting edges are arranged on two sides of an end portion of the main blade along the length direction. Second L-shaped gaps communicated with the groove for fixing the main blade are respectively arranged on two sides of the lower end face of the cutting rod close to the main cutting edges. A discharging-chip surface of the main cutting edge is formed on a lateral surface intersecting with the main blade in the second L-shaped gaps. The discharging-chip surface of the main cutting edge is a smooth curve face formed by the lower end face of the cutting rod gradually inclines and extends outward to an outer side of the guiding stop ring. One side of the first L-shaped gap is provided with a vice blade. A lateral cutting edge is arranged on an outer side of the vice blade. Due to the fact that the cutting chip can be discharged smoothly, the cutter for discharging the chip and reaming the holes easily has the advantages of improving surface smoothness of the processing holes, prolonging service life of the cutting edges, enabling manufacture, installation and maintenance to be simple.
Description
Technical field
The utility model relates to a kind of machine tool, is specifically related to a kind of cutter for spot-facing.
Background technology
Spot-facing refers to process in the hole that has processed counter sink, boss section, perhaps in the blind hole of having processed, process base plane etc., spot-facing processing is different from general Milling Process, in Milling Process, cutter fix rotatablely moving of axle and up and down lifting, the workpiece that is fixed on the workbench then can be done horizontal and vertical motion in horizontal plane, thereby processes certain shape.And in the spot-facing processing, workpiece is fixed, and the processing of base plane in counter sink, boss section or the blind hole is finished in the cutter that only rotates feeding in the vertical direction.Thereby it is simple to have a procedure, to the characteristics such as low that require of lathe.Common spot-facing cutter can be divided into two classes, one class is for processing counter sink and raised head face, its structure generally comprises the lead at the handle of a knife that is connected with the clamping device of lathe, the knife bar that is connected to the handle of a knife lower end, the cutting edge that is arranged on the knife bar lower end and middle part, knife bar lower end, the diameter of lead and the diameter of machining hole is adaptive, like this, when spot-facing, lead is plugged on and positions in the machining hole, thereby can improve counter sink and the axiality between the machining hole.For example, disclosed on the Chinese patent literature " a kind of spot-facing cutter ", Granted publication number are CN201848603U, mainly are comprised of lead, cutting edge, drill bit knife bar, fairlead, and fairlead is fastened on the lead.It is applicable to process counter sink, and fairlead is conducive to avoid the damage to own machining hole side in process, and guarantees the counter sink positional precision; Another kind of then is for the flat bottom surface of processing blind hole of ream, this type of cutter normally polishes and again grinds cutting edge with the end of fluted drill cutting edge, it has easy to make, the advantage that cost is low, yet all there is a problem in above-mentioned spot-facing with cutter, because its chip area normally arranges in the shape of a spiral, and blade is set directly on the knife bar, therefore work as spot-facing and add man-hour, smear metal easily is wrapped on the knife bar after rising along spiral helicine chip area, thereby cause chip removal not smooth, the smear metal meeting that is blocked in the chip area affects the surface smoothness of machining hole, and accelerates the wearing and tearing of cutting edge roundness.In addition, because whole cutter is generally integrative-structure, the material that blade is identical with the knife bar employing, so cutting edge easily weares and teares, service life is short.
The utility model content
The purpose of this utility model is existingly easily to be wrapped in the problem that causes chip removal not smooth on the knife bar for the flat existing smear metal of cutter of processing blind hole bottom surface of ream in order to solve, a kind of easy chip removal spot-facing cutter is provided, can avoid smear metal to be wrapped on the knife bar, and then be conducive to improve the surface smoothness of machining hole.
Another purpose of the present utility model is existing for the flat problem that the existing cutting edge of cutter is easy to wear, service life is short of processing blind hole bottom surface of ream in order to solve, a kind of easy chip removal spot-facing cutter is provided, blade and knife bar combine by splicing construction, thereby can greatly improve the service life of blade, and be conducive to improve the precision size of machining hole.
To achieve these goals, the utility model is by the following technical solutions: a kind of easy chip removal spot-facing cutter, comprise handle of a knife, knife bar, be provided with integratedly outward extending guiding baffle ring at knife bar and handle of a knife junction, middle part, described knife bar lower surface is provided with the main blade holddown groove of rectangle, the main blade holddown groove connects the knife bar both sides, and be positioned at main blade holddown groove both sides is respectively equipped with along cutter spindle to the first L shaped breach that extends to the guiding baffle ring in the knife bar lower surface, main blade holddown groove and two the first L shaped breach shape that all is centrosymmetric take the knife bar axle center as symmetrical centre, be provided with main blade in the described main blade holddown groove, the main blade end is provided with major cutting edge with being centrosymmetric in the length direction both sides, the major cutting edge of both sides is positioned at same plane, also be respectively equipped with along cutter spindle to the second L shaped breach that extends to the guiding baffle ring and be communicated with the main blade holddown groove near the major cutting edge place in both sides, knife bar lower surface, thereby consist of the chip area of major cutting edge, the side of intersecting with main blade in the second L shaped breach then consists of the major cutting edge clearance surface, this major cutting edge clearance surface is by the knife bar lower surface outward-dipping smooth surface that extends to guiding baffle ring lateral surface progressively, a side of the first L shaped breach is provided with auxiliary-blade, and the lateral surface of auxiliary-blade is provided with the side tool sword.
In order to improve the service life of spot-facing cutter, the utility model is made main blade and auxiliary-blade the Split type structure of inlaid type, like this, major and minor blade can adopt different materials and different Technologies for Heating Processing from knife bar, thereby can guarantee simultaneously knife bar to the requirement to hardness of the requirement of intensity, toughness and major and minor blade, and also make things convenient for the processing and manufacturing of cutting edge.In the utility model, the effect of major cutting edge is to cut the bottom surface of preprocessing hole, and the effect of auxiliary-blade mainly is to utilize side tool sword cutting finishing preprocessing hole sidewall, and like this, the power of bearing on each blade will reduce widely, make stressed more even.Especially, main blade is integrative-structure, thereby is conducive to guarantee two major cutting edges of its lower end in the uniformity of the glacing flatness that adds man-hour and height, and then can guarantee flatness and the dimensional accuracy of machining hole bottom surface.Also has effectively balance knife bar stressed of the major cutting edge that arranges and auxiliary-blade that be centrosymmetric, the vibrations when reducing to cut, the service life of improving knife bar.
Further, major cutting edge is when carrying out the cutting of bottom surface, the smear metal meeting is upwards discharged along the major cutting edge clearance surface on the second L shaped breach, since the major cutting edge clearance surface be one by the knife bar lower surface outward-dipping smooth surface that extends to guiding baffle ring lateral surface progressively, thereby can guarantee the smooth discharge of smear metal.Especially, the smear metal of both sides major cutting edge can be formed naturally an outward-dipping angle with knife bar and away from knife bar after discharging chip area, thereby can avoid smear metal to be wrapped on the knife bar or be blocked in the machining hole, and then be conducive to improve the surface smoothness of machining hole, reduce the wearing and tearing of cutting edge roundness.And the setting of guiding baffle ring both had been conducive to improve the bonding strength of knife bar and handle of a knife, can make again the major cutting edge clearance surface have enough guiding distances away from knife bar, and the smear metal of discharging behind the chip area can away from knife bar, be wrapped on the knife bar to avoid smear metal fully.
As preferably, the intersecting lens of described major cutting edge clearance surface and knife bar cross section is the straight line perpendicular to main blade, and the edge line that major cutting edge clearance surface and main blade intersect is parabola.That is to say, the major cutting edge clearance surface is that a straight line perpendicular to main blade scans the smooth surface that forms along parabola, thereby the angle of the tangent line on the major cutting edge clearance surface and knife bar axial line is progressively increased by knife bar lower surface to the baffle ring lateral surface that leads, the smear metal that so both had been conducive to major cutting edge is in the initial period discharge that can successfully make progress, can make again smear metal when leaving chip area, can keep an enough angle with the knife bar axis, thereby guarantee that smear metal can not be wrapped on the knife bar after leaving chip area.
As preferably, the end of described auxiliary-blade is provided with the end blade, and the end blade of two auxiliary-blades is positioned at same plane, and the end blade is in the axial direction than the short 0.1-0.2 millimeter of major cutting edge.Because spot-facing cutter of the present utility model mainly is for the flat processing blind hole bottom surface of ream, therefore, in the end of auxiliary-blade the effect that the end blade can play assisted machining is set, thereby is conducive to improve stock-removing efficiency.Because when a plurality of cutting edges cut the preprocessing hole bottom surface simultaneously, can be because the groove phenomenon appears in the error of the shape and size such as each cutting edge height in the bottom surface, affect the smooth of bottom surface, therefore, the end blade of auxiliary-blade is in the axial direction than the short 0.1-0.2 millimeter of the major cutting edge of main blade in the utility model, that is to say, when the bottom of major cutting edge and preprocessing hole rigidly connects when touching, the end blade is not tactile with the bottom connection of preprocessing hole, when spot-facing cutter when rotating vertically progressively to lower feeding, end blade on the auxiliary-blade and major cutting edge participate in the bottom surface of the flat preprocessing hole of ream together jointly, thereby play an assisted machining effect.When spot-facing cutter arrives when requiring in axial feeding, be rotated further spot-facing cutter, can utilize major cutting edge that the complete ream in the bottom surface of preprocessing hole is flat, finish last cutting finishing, the end blade of this moment is then inoperative, thereby can effectively avoid the appearance of groove phenomenon.
As preferably, thereby described major cutting edge progressively is skewed near the knife bar axle center by the main blade outside to the main blade center.For smooth bottom surface of ream, its length that is used for the blade of cutting must be more than or equal to the radius of preprocessing hole, and blade must pass through the namely centre of gyration of blade of knife bar axle center, if blade departs from the knife bar axle center, and be positioned at the rear in the blade direction of rotation, then the edge length boss that how long all will stay the next one to cut at the center of bottom surface; When blade departs from the knife bar axle center, and be positioned at the place ahead in the blade direction of rotation, the center of bottom surface still can't be cut, but by blade axial compression moulding.In order to reduce extruding force as far as possible, blade departs from forward the distance in knife bar axle center should be as far as possible little, in the prior art, two major cutting edges also can adopt Split type structure usually as auxiliary-blade, therefore, its blade must depart from the axle center of knife bar when mounted, like this, the back that is positioned at main blade on the knife bar is used for fixedly that the thickness of main blade part can correspondingly reduce, thus the intensity of weakening knife bar.The utility model is arranged on two major cutting edges on the main blade of one, like this center of main blade can with the axis coinciding of knife bar, in the situation that guarantee same thickness, can correspondingly increase and be used for fixedly main blade thickness partly on the knife bar.Particularly, because thereby major cutting edge progressively is skewed near the knife bar axle center by the main blade outside to the main blade center, thereby can reduce significantly distance between two major cutting edges and the knife bar axle center, axial compression power when greatly reducing spot-facing, and major cutting edge and rotation direction are that the cutting direction of major cutting edge can keep substantially vertical, thereby are conducive to improve the stock-removing efficiency of major cutting edge.
As preferably, the both sides major cutting edge is parallel to each other, and the vertical range between the major cutting edge is the 1.2-1.8 millimeter, is provided with chisel edge between two major cutting edges, and described chisel edge consists of the angles of 90 degree-95 degree through the knife bar axle center and with major cutting edge.
After spot-facing cutter in use progressively wore and tore, the vertical range between the major cutting edge can progressively reduce, and therefore is set the service life that rational vertical range both had been conducive to prolong main blade, axial extruding force can be controlled at less scope again.Axial compression power when being arranged on two chisel edges between the major cutting edge and can further reducing spot-facing, and the major cutting edge of both sides and middle chisel edge are connected as a single entity, thereby can form two centrosymmetric rear knife faces at the main blade end face, to make things convenient for the processing of each blade on the main blade.
As preferably, the described first L shaped breach is provided with a lateral vertical of auxiliary-blade in main blade, its another side is by the knife bar lower surface outward-dipping guiding baffle ring lateral surface that extends to progressively, thereby consist of the auxiliary-blade clearance surface, thereby the end blade of two auxiliary-blades is by progressively being skewed near the knife bar axle center in the auxiliary-blade lateral, and the vertical range between end blade and the knife bar axle center is the 0.1-0.2 millimeter.
Because the end blade of auxiliary-blade is by progressively being skewed near the knife bar axle center in the auxiliary-blade lateral, the position of auxiliary-blade is leaned on forward in the blade direction of rotation as far as possible, thereby the thickness that is used for the fixed joint blade section on the increase knife bar, be conducive to improve the intensity of knife bar, and under the identical blade thickness of maintenance, can dwindle the end blade of both sides and the distance between the knife bar axle center, making end blade and rotation direction is that the cutting direction of end blade is substantially vertical, thereby is conducive to improve the stock-removing efficiency of end blade.
As preferably, the intersecting lens of described auxiliary-blade clearance surface and knife bar cross section is the straight line that is parallel to main blade, and the auxiliary-blade clearance surface is parabola with the edge line that intersects perpendicular to the side of main blade.
Structure similar with the major cutting edge clearance surface, the auxiliary-blade clearance surface is one and is parallel to the straight line of main blade along the smooth surface of parabola scanning formation, thereby the angle of the tangent line on the auxiliary-blade clearance surface and knife bar axial line is progressively increased by knife bar lower surface to the baffle ring lateral surface that leads, be conducive to smear metal that auxiliary-blade when cutting produce in the initial period discharge that can successfully make progress, can make again smear metal when leaving knife bar, can keep an enough angle with the knife bar axis, thereby guarantee that smear metal can not be wrapped on the knife bar.
As preferably, the side tool sword of described auxiliary-blade extends to form the step that extends out by the end to handle of a knife one side, and at the transition position of step chamfering is set, thereby can directly process the chamfering of the edge of portalling in spot-facing, improve working (machining) efficiency, guarantee the axiality in chamfering and hole.
As preferably, the side that exposes to the second L shaped breach on the described main blade is respectively equipped with the bellmouth that extends in the knife bar, bellmouth bottom in the knife bar extends to form screwed hole, be provided with adaptive cone pin in the bellmouth, the inner of cone pin is provided with the double-screw bolt that cooperates with screwed hole integratedly, and the outer face of cone pin is provided with flat recess or cross recess.
Be threaded by cone pin between main blade and the knife bar, be convenient to its installation, dismounting and maintenance, especially, two cone pins of the present utility model have the effect of shop bolt and screw simultaneously, simplify manufacturing, installation and the maintenance of spot-facing cutter, cone pin has the positioning action of automatic centering, can improve the positioning accuracy of main blade, and the gap when avoiding columniform pin and hole to cooperate is on the impact of positioning accuracy.
Therefore, the utlity model has following beneficial effect: chip discharge is smooth and easy, can avoid smear metal to be wrapped on the knife bar, be conducive to improve surface smoothness and the dimensional accuracy of machining hole, and knife bar has higher intensity, the long service life of blade, stock-removing efficiency is high, makes, installs and keep in repair easy.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the top view of the utility model knife bar end.
Fig. 3 is side direction view of the present utility model.
Fig. 4 is the syndeton schematic diagram of main blade of the present utility model and knife bar.
Among the figure: 1, handle of a knife 2, knife bar 3, guiding baffle ring 4, main blade holddown groove 5, the first L shaped breach 6, main blade 61, major cutting edge 63, bellmouth 64, cone pin 65, screwed hole 66, double-screw bolt 67, copper filler 7, auxiliary-blade 71, end blade 72, side tool sword 73, chamfering 74, auxiliary-blade clearance surface 8, chisel edge 9, rear knife face 10, the second L shaped breach 11, major cutting edge clearance surface.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment the utility model is further described.
Such as Fig. 1, Fig. 2, among the embodiment shown in Figure 3, a kind of easy chip removal spot-facing cutter of the present utility model, comprise columniform handle of a knife 1, knife bar 2, knife bar is being provided with outward extending guiding baffle ring 3 integratedly with the handle of a knife junction, middle part, knife bar lower surface arranges the main blade holddown groove 4 of rectangle, the main blade holddown groove connects the knife bar both sides, the center of main blade holddown groove and the axis coinciding of knife bar, and be positioned at main blade holddown groove both sides in the knife bar lower surface main blade holddown groove and two the first L shaped breach shape that all is centrosymmetric take the knife bar axle center as symmetrical centre is set respectively along cutter spindle to the first L shaped breach 5 that extends to the guiding baffle ring.Be embedded with main blade 6 in the main blade holddown groove, the main blade end is provided with major cutting edge 61 with being centrosymmetric in the length direction both sides, the major cutting edge of both sides is positioned at same plane, the major cutting edge outer end is positioned on the summit in the main blade outside, thereby major cutting edge progressively is skewed near the knife bar axle center by the main blade outside to the main blade center, the both sides major cutting edge is parallel to each other, and the vertical range between the major cutting edge is advisable with the 1.2-1.8 millimeter, and its preferred value is 1.5 millimeters.In addition, also be respectively equipped with along cutter spindle to the second L shaped breach that extends to the guiding baffle ring and be communicated with the main blade holddown groove near the major cutting edge place in both sides, knife bar lower surface, thereby consist of the chip area of major cutting edge, the side of intersecting with main blade in the second L shaped breach then consists of major cutting edge clearance surface 11, this major cutting edge clearance surface is by the knife bar lower surface outward-dipping smooth surface that extends to guiding baffle ring lateral surface progressively, specifically, the intersecting lens of major cutting edge clearance surface and knife bar cross section is the straight line perpendicular to main blade, and the edge line that major cutting edge clearance surface and main blade intersect is parabola.That is to say, the major cutting edge clearance surface is that a straight line perpendicular to main blade scans the smooth surface that forms along parabola, thereby progressively increased by knife bar lower surface to the tangent line of the baffle ring lateral surface each point that leads and the angle of knife bar axial line on the major cutting edge clearance surface, specifically can be designed to 5 degree between 75 degree, the smear metal that so both had been conducive to major cutting edge is in the initial period discharge that can successfully make progress, can make again smear metal when leaving chip area, can keep an enough angle with the knife bar axis, thereby guarantee that smear metal can not be wrapped on the knife bar after leaving chip area.
A lateral vertical on the first L shaped breach is in the main blade holddown groove, and another side is by the knife bar lower surface outward-dipping guiding baffle ring lateral surface that extends to progressively, thereby consists of auxiliary-blade clearance surface 74.With the similar ground of major cutting edge clearance surface, the auxiliary-blade clearance surface is one and is parallel to the straight line of main blade along the smooth surface of parabola scanning formation, that is to say, the intersecting lens of auxiliary-blade clearance surface and knife bar cross section is the straight line that is parallel to main blade, and the auxiliary-blade clearance surface is parabola with the edge line that intersects perpendicular to the side of main blade.Side perpendicular to the main blade holddown groove on the first L shaped breach is provided with auxiliary-blade 7, the end of auxiliary-blade is provided with end blade 71, the lateral surface of auxiliary-blade is provided with side tool sword 72, the end blade of two auxiliary-blades is positioned at same plane, and the end blade in the axial direction should be than the short 0.1-0.2 millimeter of major cutting edge, desirable 0.15 millimeter usually.Structure similar ground with major cutting edge on the main blade, thereby the end blade of two auxiliary-blades also can be by progressively being skewed near the knife bar axle center in the auxiliary-blade lateral, vertical range between end blade and the knife bar axle center can remain between the 0.1-0.2 millimeter, making end blade and its rotation direction is that the cutting direction of end blade is substantially vertical, thereby be conducive to improve the stock-removing efficiency of end blade and reduce wear, and make the end blade after wearing and tearing, still can keep substantially vertical with cutting direction, be conducive to increase the service life.The side tool sword of auxiliary-blade extends to form the step that extends out by the end to handle of a knife one side, and at the transition position of step chamfering 73 is set, in order to process coaxially the chamfering of the edge of portalling in spot-facing, improves working (machining) efficiency.
In addition, axial compression power when reducing spot-facing, chisel edge 8 can be set between two major cutting edges, this chisel edge forms 90 degree to the angle of 95 degree through the knife bar axle center and with major cutting edge, its preferred value is 90 degree, be that chisel edge and major cutting edge are perpendicular, make the length of chisel edge keep the shortest, the major cutting edge of both sides and middle chisel edge are connected as a single entity, thereby the main blade end face is divided into centrosymmetric two zones, each zone becomes the separately rear knife face 9 of major cutting edge, greatly makes things convenient for the processing of each blade on the main blade.
At last, as shown in Figure 4, the side that exposes to the second L shaped breach on two main blades arranges respectively bellmouth 63, and this bellmouth extends in the knife bar 2, and adaptive cone pin 64 is set in the bellmouth, to realize the accurate location of main blade on knife bar.And the bellmouth bottom in knife bar extends internally and forms screwed hole 65, and certainly, the large footpath of this screwed hole should be less than the diameter of bellmouth small end; Accordingly, the inner of cone pin is provided with the double-screw bolt 66 that cooperates with screwed hole integratedly, in the outer face of cone pin flat recess or cross recess is set simultaneously.Like this, within main blade is embedded into the main blade holddown groove, cone pin can be inserted in the bellmouth, then with a word or Phillips screwdriver cone pin is tightened on the screwed hole of bellmouth bottom.Need to prove, the diameter of cone pin small end should be greater than the diameter of bellmouth segment, thereby makes the gap of leaving the 0.2-0.5 millimeter between cone pin and the bellmouth bottom surface, to guarantee closely cooperating between cone pin and the bellmouth; In addition, the outside diameter of cone pin then should be less than the outside diameter of bellmouth, in order to cone pin can be sunk in the bellmouth fully, avoids main blade surface to produce projection and stop the smooth discharge of smear metal.Further, also can after tightening cone pin, fill and lead up bellmouth with copper filler 67 again, specifically can adopt the mode of brazing first bellmouth to be filled up, then make the main blade surface keep smooth by polishing, when needs are dismantled, can remove copper filler with the hammer drill cutter first, then be available screwdriver dismounting.
In addition, each auxiliary-blade in the utility model also can adopt two cone pin location and fixing with the main blade same structure, perhaps also can adopt brazing directly to be weldingly fixed on the knife bar, so that dismounting and maintenance.
The utility model is made main blade and auxiliary-blade the Split type structure of inlaid type, like this, major and minor blade can adopt the materials different from knife bar such as high-speed tool steel or carbide alloy, and adopt different Technologies for Heating Processing, thereby can guarantee simultaneously knife bar to the requirement of intensity, toughness and major and minor blade to the requirement of hardness, anti-wear performance, be conducive to improve cutting speed, increase the service life and make things convenient for the processing and manufacturing of cutting edge.In the utility model, the effect of auxiliary-blade mainly is to utilize side tool sword cutting preprocessing hole sidewall, the bottom surface ream of preprocessing hole is flat then mainly to be finished by major cutting edge, the end blade of auxiliary-blade then plays the effect of an assisted machining, when spot-facing cutter arrives when requiring in axial feeding, be rotated further spot-facing cutter, can utilize major cutting edge that the complete ream in the bottom surface of preprocessing hole is flat, finish last cutting finishing, and the end blade of this moment is because its length is shorter than major cutting edge, therefore do not play shear action, thereby can effectively avoid the appearance of groove phenomenon.The smear metal that produces during major and minor blade cutting then can lean outward by major cutting edge clearance surface, auxiliary-blade clearance surface and tiltedly discharge, and is wrapped on the knife bar to avoid smear metal fully.
Claims (9)
1. easy chip removal spot-facing cutter, comprise handle of a knife (1), knife bar (2), it is characterized in that, be provided with integratedly outward extending guiding baffle ring (3) at knife bar and handle of a knife junction, middle part, described knife bar lower surface is provided with the main blade holddown groove (4) of rectangle, the main blade holddown groove connects the knife bar both sides, and be positioned at main blade holddown groove both sides is respectively equipped with along cutter spindle to the first L shaped breach (5) that extends to the guiding baffle ring in the knife bar lower surface, main blade holddown groove and two the first L shaped breach shape that all is centrosymmetric take the knife bar axle center as symmetrical centre, be provided with main blade (6) in the described main blade holddown groove, the main blade end is provided with major cutting edge (61) with being centrosymmetric in the length direction both sides, the major cutting edge of both sides is positioned at same plane, also be respectively equipped with along cutter spindle to the second L shaped breach (10) that extends to the guiding baffle ring and be communicated with the main blade holddown groove near the major cutting edge place in both sides, knife bar lower surface, thereby consist of the chip area of major cutting edge, the side of intersecting with main blade in the second L shaped breach then consists of major cutting edge clearance surface (11), this major cutting edge clearance surface is by the knife bar lower surface outward-dipping smooth surface that extends to guiding baffle ring lateral surface progressively, a side of the first L shaped breach is provided with auxiliary-blade (7), and the lateral surface of auxiliary-blade is provided with side tool sword (72).
2. a kind of easy chip removal spot-facing cutter according to claim 1 is characterized in that, the intersecting lens of described major cutting edge clearance surface and knife bar cross section is the straight line perpendicular to main blade, and the edge line that major cutting edge clearance surface and main blade intersect is parabola.
3. a kind of easy chip removal spot-facing cutter according to claim 1, it is characterized in that, the end of described auxiliary-blade is provided with end blade (71), and the end blade of two auxiliary-blades is positioned at same plane, and the end blade is in the axial direction than the short 0.1-0.2 millimeter of major cutting edge.
4. a kind of easy chip removal spot-facing cutter according to claim 1 is characterized in that, thereby described major cutting edge progressively is skewed near the knife bar axle center by the main blade outside to the main blade center.
5. a kind of easy chip removal spot-facing cutter according to claim 4, it is characterized in that, the both sides major cutting edge is parallel to each other, vertical range between the major cutting edge is the 1.2-1.8 millimeter, be provided with chisel edge (8) between two major cutting edges, described chisel edge consists of the angle that 90 degree-95 are spent through the knife bar axle center and with major cutting edge.
6. according to claim 1 and 2 or 3 or 4 or 5 described a kind of easy chip removal spot-facing cutters, it is characterized in that, the described first L shaped breach is provided with a lateral vertical of auxiliary-blade in main blade, its another side is by the knife bar lower surface outward-dipping guiding baffle ring lateral surface that extends to progressively, thereby consist of the auxiliary-blade clearance surface, thereby the end blade of two auxiliary-blades is by progressively being skewed near the knife bar axle center in the auxiliary-blade lateral, and the vertical range between end blade and the knife bar axle center is the 0.1-0.2 millimeter.
7. a kind of easy chip removal spot-facing cutter according to claim 6, it is characterized in that, the intersecting lens of described auxiliary-blade clearance surface and knife bar cross section is the straight line that is parallel to main blade, and the auxiliary-blade clearance surface is parabola with the edge line that intersects perpendicular to the side of main blade.
8. according to claim 1 and 2 or 3 or 4 or 5 described a kind of easy chip removal spot-facing cutters, it is characterized in that, the side tool sword of described auxiliary-blade extends to form the step that extends out by the end to handle of a knife one side, and at the transition position of step chamfering (73) is set.
9. according to claim 1 and 2 or 3 or 4 or 5 described a kind of easy chip removal spot-facing cutters, it is characterized in that, the side that exposes to the second L shaped breach on the described main blade is respectively equipped with the bellmouth (63) that extends in the knife bar, bellmouth bottom in the knife bar extends to form screwed hole (65), be provided with adaptive cone pin (64) in the bellmouth, the inner of cone pin is provided with the double-screw bolt (66) that cooperates with screwed hole integratedly, and the outer face of cone pin is provided with flat recess or cross recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220443911 CN202824770U (en) | 2012-09-03 | 2012-09-03 | Cutter for discharging chip and reaming holes easily |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220443911 CN202824770U (en) | 2012-09-03 | 2012-09-03 | Cutter for discharging chip and reaming holes easily |
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| Publication Number | Publication Date |
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| CN202824770U true CN202824770U (en) | 2013-03-27 |
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| CN 201220443911 Expired - Fee Related CN202824770U (en) | 2012-09-03 | 2012-09-03 | Cutter for discharging chip and reaming holes easily |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873378A (en) * | 2012-09-03 | 2013-01-16 | 宁波敏宝卫浴五金水暖洁具有限公司 | Counter sinking cutter facilitating chip removal |
| CN104475825A (en) * | 2014-11-18 | 2015-04-01 | 杨毅坚 | Blades-welded drill tip centering countersink |
| CN113558791A (en) * | 2017-02-07 | 2021-10-29 | 瑞普国际口腔种植科技公司 | Drill type cutting tool for surgical operation |
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2012
- 2012-09-03 CN CN 201220443911 patent/CN202824770U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102873378A (en) * | 2012-09-03 | 2013-01-16 | 宁波敏宝卫浴五金水暖洁具有限公司 | Counter sinking cutter facilitating chip removal |
| CN104475825A (en) * | 2014-11-18 | 2015-04-01 | 杨毅坚 | Blades-welded drill tip centering countersink |
| CN113558791A (en) * | 2017-02-07 | 2021-10-29 | 瑞普国际口腔种植科技公司 | Drill type cutting tool for surgical operation |
| CN113558791B (en) * | 2017-02-07 | 2023-01-10 | 瑞普国际口腔种植科技公司 | Drill type cutting tool for surgical operation |
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