CN86102613A

CN86102613A - Repeatedly grindable triedged cutter

Info

Publication number: CN86102613A
Application number: CN86102613.6A
Authority: CN
Inventors: 胡宁成
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-04-12
Filing date: 1986-04-12
Publication date: 1987-01-24
Also published as: CN1006448B

Abstract

It is convenient to the invention provides a kind of sharpening, and knife edge angular changes the more three sword metal cutting cuttves of refacing.The characteristics of this bite are that blade cross section is a concave shape or mountain font, back that need only three blades of grinding during sharpening and need not grind chip-breaker, and three blades can grind the anterior angle of the positive and negative or null value that needs on request.This repeatedly grindable triedged cutter series not only sharpening is convenient and can reduce the sharpening workload in a large number, also can improve operation and improve cutting, increases work efficiency, and also can improve the utilization rate of cutter, thereby reduce the consumption of cutter and emery wheel morely.

Description

Repeatedly grindable triedged cutter

The present invention relates to a kind of novel metal machining cutter that can grind cutting edge easily with various angles.

The cross section of the blade refaced that generally adopts mostly is flat shape quadrangle or other polygon at present, grinding method is at first to grind a horizontal chip-breaker near the blade end place, part with the end perk grinds main cutting edge again, perhaps that perk is partly ground into point of a knife to make the lathe tool of machining screw.Sometimes again that chip-breaker is ground by oblique.After blade or point of a knife damage again with chip breaking groove depth mill with finishing blade or point of a knife, when insufficient strength, just chip-breaker all must be ground off, then the blade or the point of a knife that make new advances of sharpening as stated above.The not only grinding workload of this grinding method of this cutter decision is big, and the cutter utilization rate is low, and blade and cutting edge profile change the needs that can not adapt to processing well.

It was both convenient to the purpose of this invention is to provide a kind of sharpening, and blade and knife edge angular can have the novel cutting tool of multiple variation again by processing request.

Invention is achieved in that blade becomes polyhedron, and its cross section becomes a concave shape, but blade top does not have the plane, has only the right and left two vertical ribs of symmetry mutually, and these two ribs are the intersection of the lateral surface of groove medial surface and blade just.With the bottom surface of groove as the front, the sharpening end face just obtains front edge (or being chisel edge), carry out grinding by the angle of cut that becomes 40 degree～70 degree with the vertical bisector plane of groove floor respectively in the both sides of the end face groove of blade again, two planes that grind are the back of two side edges, and the intersection of two medial surfaces of they and groove promptly is two side edges of this cutter.Angle about clamping or welding all make groove floor by 8 degree during use is upturned, thus make the anterior angle of these three blades all be on the occasion of.If on this basis three blades are carried out grinding by certain angle, just can produce its anterior angle is three new swords of negative value or zero.When blade or point of a knife damaged in the cutting, also only needing as stated above a little, the back of each blade of grinding just can reach the purpose of repairing blade.

Now in conjunction with the accompanying drawings the present invention is done further specifying of detail.

Fig. 1 is exactly a repeatedly grindable triedged cutter of the present invention, (4), (5) be two vertical ribs on groove top, (β) is the angle of cut of groove medial surface and blade lateral surface, (6), (7) are the back of two side edges, (1), (2) be two side edges, (3) then are chisel edges.The tool cutting edge angle of side edge

_rCan grind on demand, and cutting edge inclination λ _sBasically all be negative value.

Three sharpenings among Fig. 1 are removed just to have produced again new blade, and at this moment the anterior angle of blade can be negative value or zero, and Fig. 2 promptly is that the anterior angle of three swords all is the situation of negative value.

This 3-edge surgical knife of refacing also can be applicable to the plate-like milling cutter that can reface, the broaching tool of can refacing.Cutter head is slightly turned forward to get final product.

This repeatedly grindable triedged cutter remaking some changes in shape, just can be obtained desirable inside and outside garden lathe tool, facing tool (planing tool), threading tool, cutoff tool and various offset tool.

Had more a chip breaking wall (8) that plays the chip breaking effect in the groove of Fig. 3, the chip breaking wall place in front edge during sharpening grinds some breach, makes front edge become two sections.This cross section is that one of mountain font has in fact become opposite two cuttves that major cutting edge and auxiliary-blade are all arranged separately of smear metal direction to cutter, thereby when processing endoporus, outer garden or plane, just can process back and forth, do not run empty cutter, feed operation is also more convenient, and this is existingly can reface cutter can't be obtained.

Fig. 4 changes the relative position of this offset tool and workpiece and correspondingly adjusts nose angle for cross section is the offset tool of half mountain word, and this offset tool just can replace existing tool cutting edge angle to be respectively various offset tools and bowin knives such as 90 degree, 60 degree.The method of its clamping, welding and sharpening and its superiority are as described above.

Fig. 5 is the 3-edge surgical knife refaced of processing dextrorotation trapezoidal thread.The static anterior angle of the side edge on its left side is zero (processing left hand thread then opposite), and point of a knife is all raised as previously mentioned slightly when welding or clamping in addition, all be on the occasion of, certain chamfered edge that also can grind negative rake so add the anterior angle of its three blades in man-hour.Precision and fineness that this threading tool can reduce cutting force and improve screw thread are undoubtedly.When designing this cutter, should make the width on groove base corresponding with standard thread cross section alveolus bottom width, make two side edges symmetry and its angle should equal angle of thread during sharpening, the method with cushioning during the dress cutter makes front edge and plane, two side edge places overlap with basal plane.If be necessary, can in groove, press the chip breaking piece of a convex shape.Reduced width at the bottom of Fig. 5 or Fig. 1 further groove is made it corresponding with the angular thread cross section alveolus bottom width of standard, the three sword angular thread lathe tools that just obtained to reface, its sharpening is the same with above-mentioned Lathe Tool for Cutting Trapezoid Threads with dress cutter method.

Then for refacing three sword cutoff tools, it has not only changed grinding method to Fig. 6, thereby because of there being two side edges to improve working angles.Can in groove, break the bits piece with chip breaking.

Should have the pad of various angle different shapes when using above-mentioned cutter.

The available carbide alloy of above-mentioned repeatedly grindable triedged cutter series is made small blade, is contained on the handle of a knife with the method for welding or clamping, and also common used material such as available alloy tool steel is made the big blade of can be directly installing on the knife rest.

These a series of repeatedly grindable triedged cutters not only sharpening are convenient, with reducing a large amount of sharpening work, also can improve and improve cutting, increase work efficiency, and also can improve the utilization rate of cutter morely, thereby reduce the consumption of cutter and emery wheel.

Documents of correction

(continuous page or leaf)

(4) after the preceding revisal of the capable revisal of file name page or leaf

Specification 18 ... grind new blade or cutter ... grind new blade or point of a knife.Close

Point.The decision of this cutter in the existing this situation that can reface blade,

……。As first worker of mechanotronics office generation of Shanghai City

" turner " of can 1972 compiling and

Its many common works is all on the books.

This cutter decision ...

Specification 25 and cutting edge inclination λ _sBasically all be negative cutting edge inclination λ _sBasically all be negative value,

Value.This has all improved the intensity of two side edges.

The specification 28 this 3-edge surgical knifes of refacing ...This 3-edge surgical knife of refacing also can be applicable to

Cutter head is slightly turned forward to get final product.The plate-like milling cutter that can reface can be refaced and draw

Cutter.For the plate-like milling cutter, it is characterized in that

The cutter head groove coils towards the garden, groove floor

It is tangent with the garden of a certain diameter of plate-like milling cutter,

It is the diameter that groove floor is not coiled by the garden.

For broaching tool, it is characterized in that groove is towards drawing

Cutter shaft line and the axis of groove floor and broaching tool

The angle of cut less than 90 the degree.

Claims

1, a kind of metal cutting tool of making by various cutter materials of refacing that three cutting edges are arranged, be characterized in: the cross section of blade is a concave shape, and mutual vertical rib (4), (5) intersection of the lateral surface of the medial surface of groove and blade just of symmetry of each one of blade groove top the right and left, the angle on this two plane is (β).

2, be used to process the bite of request claim 1 record of angular thread, it is characterized in that the width at the bottom of the blade groove is narrower and corresponding with standard thread cross section alveolus bottom width.

3, be used to process the bite of request claim 1 record of trapezoidal thread or angular thread, the character cut in bas-relief shape left and right sides that it is characterized in that blade cross section is asymmetric, thereby the less top of angle between groove left side medial surface or Right Inboard face and groove floor has more an elongated plane, and the bottom land width is corresponding with standard thread cross section alveolus bottom width.

4, be used to process the bite of request claim 1 record of garden cylindricality workpiece surfaces externally and internally or processing plane, it is characterized in that the outstanding chip breaking wall (8) of blade groove central authorities, thereby make its cross section resemble a mountain word.

5, the bite that can replace existing offset tool such as existing 90 degree or 60 degree or bowin knife of request claim 4 record is characterized in that this cutter only is ask cutter that claim 4 puts down in writing left half side, but has kept the chip breaking wall.

6, the cutoff tool of request claim 1 record is characterized in that broad at the bottom of the groove and the lateral dimension of groove both sides is less, and promptly two side edges are very short.

7, can use the welding or the method for clamping to be installed on the handle of a knife of section as the character cut in bas-relief shape, the bite of request claim 1,2,3,4,5,6 records is characterized in that small blade, self no handle of a knife.

8, the record of request claim 1,2,3,4,5,6 can directly be contained in bite on the knife rest, it is characterized in that blade strength enough and longer, both can reface also need not add handle of a knife again.

9, the cutter of application request claim 1,3 record is characterized in that as the refaced plate-like milling cutter of cutter tip the cutter head groove coils towards the garden, and the garden of groove floor and a certain diameter of plate-like milling cutter is tangent, i.e. the diameter that do not coil by the garden of groove floor.

10, the cutter of application request claim 1,3 record is as the broaching tool of cutter tip, it is characterized in that groove is towards the broaching tool axis and the angle of cut of the axis of groove floor and broaching tool is spent less than 90.