CN2204210Y

CN2204210Y - Cutting tool

Info

Publication number: CN2204210Y
Application number: CN 94245667
Authority: CN
Inventors: 张慰宗; 齐旺
Original assignee: Shougang Corp
Current assignee: Shougang Corp
Priority date: 1994-12-01
Filing date: 1994-12-01
Publication date: 1995-08-02
Anticipated expiration: 2004-12-01

Abstract

The utility model relates to a cutting tool, particularly a cutting tool for cutting a metal workpiece with a big section. The tool bit is composed of a tool bit body and a blade welded at the upper part of the tool bit body, wherein, the lower part of the tool bit body is provided with a locating slot, and the tool bit body is inserted into a compatible slot at the end of the tool body. In general, the cutting tool can cut a metal workpiece with a diameter of 1000 mm, having the advantages of compact integral size, convenient use, convenient processing and long service life.

Description

Cutting tool

The utility model is a cutoff tool, particularly cuts off the cutoff tool of heavy in section metal works, belongs to the metal cutting tool field

When the cutting metal workpiece, along with the increasing of workpiece sectional dimension, the cantilever of cutter hub also needs corresponding increase, and this makes the rigidity of cutter descend.The cutoff tool of existing heavy in section workpiece is for improving its rigidity, general blade and cutter hub be connected being rigidly connected that the employing machine presss from both sides, because clamped cutting bit all need be used clamping element, and the clamping element size also needs corresponding increase, thereby the cutter overall dimensions is too big, secondly clamping element is easily loosening because of vibration in working angles, again because the gap that certainly exists between blade and cutter hub, the intensity that adds cutter itself, toughness is all lower, therefore easy tipping and cracked, blade less also being difficult for refaces in addition, so the cutoff tool of this kind structure is difficult to cut off the more metal works of heavy in section (＞Φ 200).If being connected of blade and cutter hub adopts monoblock type to weld,, make the dismounting of cutter, the inconvenience of refacing then again because of the cutter hub size is very big, need centering tool setting again when using simultaneously, blade then causes whole cutter hub to scrap again if damage, thus the monoblock type brazed shank tool time-consuming, take a lot of work, take material.

The purpose of this utility model provides a kind of cutoff tool, particularly cuts off the cutoff tool of heavy in section metal works, its overall dimensions compactness, use, easily manufactured, long service life.

The technical scheme that the utility model achieves the above object is:

A kind of cutoff tool particularly cuts off the cutoff tool of heavy in section metal works, and cutter hub (1) and cutter head are arranged, and cutter head is made up of body of tool bit (2) and the blade (3) that is welded in this body of tool bit top, and the sidepiece of blade (3) has auxiliary angle (X ^' _r), a chip curling groove (4) (see figure 3) is arranged at blade (3) top, it is characterized in that: there is a locating slot (5) body of tool bit (2) its underpart of forming cutter head, in the groove (6) of the consistent shape of this body of tool bit (2) insertion cutter hub (1) end.

The vertical section of this blade chip curling groove (4) can be that circular arc (see figure 3) or straightway add the circular arc (see figure 6), the cross section (see figure 4) of this blade chip curling groove can be done (radius is R) in the arc-shaped, the auxiliary angle (X of this blade ^' _r) (see figure 5) can get the small value.

The utility model compared with prior art has following advantage:

(1) owing to the clamping element of inorganic folder usefulness, so the overall dimensions compactness, the cross dimension of cutter hub self can correspondingly strengthen in addition, so the cutter good rigidly, can be used to cut off the heavy in section metal works.

(2) welding of blade and cutter head is next loosening owing to being difficult for compared with being rigidly connected of machine folder, thus good impact resistance, long service life.

(3) owing to utilize the component F of cutting counter-force _Y(see figure 1) clamps cutter head and cutter hub automatically, so cutting force increases, so the also automatic corresponding increase of the clamping of cutter head and cutter hub is reliable clamping.

(4) locating slot is arranged at the body of tool bit bottom, and is simple in structure, and located lateral is reliable, easily manufactured.

(5) come compared with the monoblock type brazed shank tool, because the cutter head volume that body of tool bit and blade are formed is little, so can press the different of cutting material and cutting data easily, blade is refaced.Blade is scrapped the back only to be needed to change cutter head, but cutter hub still can continue to use.

The vertical section of this blade chip curling groove is made (see figure 3) in the arc-shaped; can use special grinding wheel when refacing; make straightway and add the circular arc (see figure 6); adjustable range is wide in the time of can adopting general emery wheel and mill when refacing; (see figure 4) in the arc-shaped is made in the cross section of this blade chip curling groove; smear metal is subjected to the effect of center curvature power and pushes contraction to the center; the chip width that makes formation reduces and with the machined surface of incision certain clearance is arranged; thereby required cutting force is reduced; protected point of a knife; reduced energy consumption; simultaneously also owing to reduce the violent fricative smear metal heat of the machined surface of smear metal and incision, the also corresponding durability that improves cutter.Auxiliary angle (the X of this blade ^' _r) (see figure 5) gets the small value,---2 ° become 20 '---30 by 1 ° ', the vibration that cutting is produced is little, thus reduce the main cutting edge tipping and blade cracked.

The drawing of accompanying drawing is described as follows:

Fig. 1 is cutoff tool cutter figure.

Fig. 2 is a cutoff tool cutter side view.

Fig. 3 is the profilograph of cutoff tool cutter head.

Fig. 4 is the side view of cutoff tool cutter head.

Fig. 5 is the vertical view of cutoff tool cutter head.

Fig. 6 makes the profilograph of straightway when adding circular arc for chip curling groove.

Fig. 7 is the front view of cutoff tool cutter hub.

Fig. 8 is the side view of cutoff tool cutter hub.

Fig. 9 is when cutting off workpiece, the cutting position cutaway view of cutter.

Now in conjunction with the embodiments the utility model is described in further detail:

Blade (3) (see figure 3) material selection YG8 or YT5, with the brazing method of routine the top of blade (3) with the body of tool bit (2) of selecting No. 45 steel or 40Cr steel for use is welded together, there is a spill locating slot (5) body of tool bit (2) its underpart of forming cutter head, with locating slot (5) cutter head is inserted in the groove (6) of consistent shape of cutter hub (1) end select No. 45 steel or 65Mn steel for use (as shown in Figure 7), with each contact-making surface wiped clean, it is good to insert it into each face contact of back before inserting.When using cutoff tool, make cutter top down, the side P(of rectangle cutter hub (1) sees Fig. 8) vertical with machine tool chief axis center line O, main cutting edge and machine tool chief axis center line O contour (seeing shown in Figure 9) can be fastened on cutter hub (1) on the knife rest after adjusting and cut.Chip curling groove size R=100-400 millimeter, r=10-30 millimeter, O '-O ' are the trajectory of r center of circle O '.The cutting speed V=100-20 rice that adopts/minute, feed is 0.1-0.45 millimeter/commentaries on classics, and then cutting width can reach the 15-50 millimeter, and the diameter D of cut metal works generally can reach 1000 millimeters.

Claims

1, a kind of cutoff tool particularly cuts off the cutoff tool of heavy in section metal works, and cutter hub (1) and cutter head are arranged, and cutter head is made up of body of tool bit (2) and the blade (3) that is welded in this body of tool bit top, and the sidepiece of blade (3) has auxiliary angle (X _r'), a chip curling groove (4) is arranged at blade (3) top, it is characterized in that: there is a locating slot (5) body of tool bit (2) its underpart of forming cutter head, in the groove (6) of the consistent shape of this body of tool bit (2) insertion cutter hub (1) end.

2, cutoff tool according to claim 1 is characterized in that: the vertical section of this blade chip curling groove (4) is a circular arc.

3, cutoff tool according to claim 1 is characterized in that: the vertical section of this blade chip curling groove (4) is that straightway adds circular arc.

4, according to one of any described cutoff tool of claim 1-3, it is characterized in that: the cross section of this blade chip curling groove (4) is a circular arc.

5, according to one of any described cutoff tool of claim 1-3, it is characterized in that: the auxiliary angle (X of this blade (3) ^' _r) be 20 '---30 '.

6, cutoff tool according to claim 4 is characterized in that: the auxiliary angle (X of this blade (3) ^' _r) be 20 '---30 '.