CN208961019U - A kind of concave groove cutoff tool - Google Patents

Abstract

The utility model discloses a kind of concave groove cutoff tools, the first cutter head and knife handle including one, first cutter head is fixed on a side end of knife handle, first cutter head includes the first cutter head front end face of the first cutter head front end, first cutter head side end face of the first cutter head side and the first cutter head upper surface on the first cutter head top, first cutter head upper surface is arc, first cutter head upper surface offers concave groove, two concave groove sides of the concave groove are plane, the bottom surface of the concave groove is arcwall face, the curvature of curve of the arcwall face of the bottom surface changes from small to big from the first cutter head to knife handle, bending degree of the arcwall face of bottom surface from the first cutter head to knife handle is by gradual steep.Simultaneously scrap is discharged in a kind of concave groove cutoff tool provided by the utility model, the smooth chip breaking of energy.

Description

A kind of concave groove cutoff tool

Technical field

The utility model relates to cutting-tool engineering fields, specifically, being related to a kind of concave groove cutoff tool.

Background technique

In mechanical processing process, usually the workpiece that need to be processed is cut off with lathe.To the workpiece being relatively large in diameter into When row cutting, the case where in order to avoid breaking, need to thicken cutoff tool, and after thickness increase, in the cutting-off process of workpiece, meeting Generate considerable scrap.Scrap is easy to be wrapped on knife handle, generates biggish resistance to the chip of the first cutter head, influences first The machining accuracy of cutter head and the abrasion for accelerating the first cutter head.And scrap is not easy chip breaking, scrap the prolonging around knife handle of strip Long line continues to extend, and too long scrap is easy scratch operator.

Utility model content

The purpose of this utility model is to provide a kind of concave groove cutoff tools, and scrap can be smoothly discharged.

Technical solution used by concave groove cutoff tool disclosed by the utility model is:

A kind of concave groove cutoff tool, the first cutter head and knife handle including one, first cutter head are fixed on the one of knife handle Side end, first cutter head include the first cutter head side of the first cutter head front end face of the first cutter head front end, the first cutter head side First cutter head upper surface of end face and the first cutter head top, first cutter head upper surface are arc, table on first cutter head Face offers concave groove, and two concave groove sides of the concave groove are plane, and the bottom surface of the concave groove is arcwall face, described The curvature of curve of the arcwall face of bottom surface changes from small to big from the first cutter head to knife handle, and the arcwall face of bottom surface is from the first cutter head to knife handle Bending degree is by gradual steep.

Preferably, the knife handle is being equipped with discharge face with the first cutter head upper surface contact position, and the discharge face is Inclined-plane and inclined-plane and the first cutter head upper surface are tangent.

Preferably, the first cutter head front end face is equal with the front end face of knife handle and is inclined-plane, first knife The upper end of head front end face forward extends out.

Preferably, first cutter head side end face is inclined-plane, and first cutter head side end face is higher than the side of knife handle Face, first cutter head side end face upper end are stretched out to side.

Preferably, it is equipped with transition face between the first cutter head front end face and two the first cutter head side end faces, The transition face is arc surface.

Preferably, the knife handle upper surface on the knife handle top and the knife handle lower surface of knife handle lower part open up useful In the groove of positioning.

Preferably, the end side of the knife handle is equipped with the second cutter head with knife handle one, second knife Header structure is identical as the first cutter head.

The beneficial effect of concave groove cutoff tool disclosed by the utility model is: passing through the first cutter head front end face and the first cutter head Upper surface forms cutting edge, cuts workpiece by cutting edge, what is formed in cutting process is entered in concave groove by cutting edge.By It is bending degree of the arcwall face of arcwall face and bottom surface from the first cutter head to knife handle in the bottom surface of concave groove by gradual steep, gentle Arcwall face enables scrap can smoothly enter into concave groove, and scrap barrier is avoided to increase the Cutting Drag of cutter head at cutter head.Into concave The scrap of slot needs rapidly to change direction at the cambered surface steepening of bottom surface, and scrap is easy to be squeezed and break in the process.And by Wider in cutting edge, scrap can also squeeze mutually at the cambered surface steepening of bottom surface after the entrance of the point of different cutting edges, make scrap It fractures.The scrap to fracture is discharged by concave groove again, and making the scrap of discharge is all the scrap to fracture, is directly entered the discharge of machine Slot avoids the too long operation for influencing machine of scrap or scratch operator.

Detailed description of the invention

Fig. 1 is a kind of front view of concave groove cutoff tool of the utility model；

Fig. 2 is a kind of axonometric drawing of concave groove cutoff tool of the utility model.

Specific embodiment

The utility model is further elaborated and is illustrated with Figure of description combined with specific embodiments below:

Referring to FIG. 1, a kind of concave groove cutoff tool, the first cutter head 12 and knife handle 11 including one, the first cutter head 12 are solid Due to a side end of knife handle 11, the first cutter head 12 includes the first cutter head front end face 121, the first cutter head of 12 front end of the first cutter head The first cutter head upper surface 124 on 12 top of the first cutter head side end face 123 and the first cutter head of 12 sides, the first cutter head upper surface 124 be arc, and the first cutter head upper surface 124 offers concave groove 13, and two concave groove sides 132 of concave groove 13 are plane, The bottom surface 132 of concave groove 13 is arcwall face, and the curvature of curve of the arcwall face of bottom surface 131 is from the first cutter head 12 to knife handle 11 by small change Greatly, bending degree of the arcwall face of bottom surface 131 from the first cutter head 12 to knife handle 11 is by gradual steep, after so that scrap is entered concave groove 13 It is fractureed at the arcwall face steepening of bottom surface 131 due to extruding.

Knife handle 11 is being equipped with discharge face 111 with 124 contact position of the first cutter head upper surface, and discharge face 111 is inclined-plane and inclined-plane It is tangent with the first cutter head upper surface 124, the scrap after fractureing is smoothly discharged, reduces resistance.

First cutter head front end face 121 is equal with the front end face of knife handle 11 and is inclined-plane, the upper end of the first cutter head front end face 121 It forward extends out, the first cutter head side end face 123 is inclined-plane, and the first cutter head side end face 123 is higher than the side of knife handle 11, the first cutter head side 123 upper end of end face is stretched out to side, by the upper end of the first cutter head front end face 121 and the first cutter head side end face 123 all to overhanging Out, knife handle 11 in cutting process is avoided to contact with workpiece.

Transition face 122, transition face 122 are equipped between first cutter head front end face 121 and two the first cutter head side end faces 123 For arc surface, transition face 122 reduces the Cutting Drag of the first cutter head front end face 121, avoids the first cutter head front end face 121 and two It is excessively sharp between first cutter head side end face 123 and broken.

The knife handle lower surface 113 of 11 lower part of knife handle upper surface 112 and knife handle on 11 top of knife handle is offered for positioning Groove, so that knife handle 11 is easier to clamping position.

The end side of knife handle 11 is equipped with the second cutter head with 11 one of knife handle, the second cutter head structure and the first cutter head 12 It is identical, by way of two cutter heads share a knife handle 11, material can be saved, saves cost.

In above scheme, cutting edge is formed by the first cutter head front end face 121 and the first cutter head upper surface 124, by cutting It considers sword to be worth doing and cuts workpiece, what is formed in cutting process is entered in concave groove 13 by cutting edge.Since the bottom surface 131 of concave groove 13 is By gradual steep, gentle arcwall face makes the bending degree of arcwall face and the arcwall face of bottom surface 131 from the first cutter head 12 to knife handle 11 Scrap can smoothly enter into concave groove 13, and scrap barrier is avoided to increase the Cutting Drag of cutter head at cutter head.Into concave groove 13 Scrap needs rapidly to change direction at the cambered surface steepening of bottom surface 131, and scrap is easy to be squeezed and break in the process.And due to Cutting edge is wider, and scrap can also squeeze mutually at the cambered surface steepening of bottom surface 131 after the entrance of the point of different cutting edges, make to give up Bits fracture.The scrap to fracture passes through concave groove 13 again and is discharged, and making the scrap of discharge is all the scrap to fracture, is directly entered machine Discharge groove avoids the too long operation for influencing machine of scrap or scratch operator.

Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this The spirit and scope of utility model technical solution.

Claims (7)

1. a kind of concave groove cutoff tool, which is characterized in that the first cutter head and knife handle including one, first cutter head are fixed on One side end of knife handle, first cutter head include the first cutter head front end face of the first cutter head front end, the first cutter head side First cutter head upper surface of one cutter head side end face and the first cutter head top, first cutter head upper surface be arc, described first Cutter head upper surface offers concave groove, and two concave groove sides of the concave groove are plane, and the bottom surface of the concave groove is arc The curvature of curve in shape face, the arcwall face of the bottom surface changes from small to big from the first cutter head to knife handle, and the arcwall face of bottom surface is from the first knife Head arrives the bending degree of knife handle by gradual steep.

2. concave groove cutoff tool as described in claim 1, which is characterized in that the knife handle is contacted with the first cutter head upper surface Place is equipped with discharge face, and the discharge face is inclined-plane and inclined-plane and the first cutter head upper surface are tangent.

3. concave groove cutoff tool as described in claim 1, which is characterized in that the front end of the first cutter head front end face and knife handle Face is equal and is inclined-plane, and the upper end of the first cutter head front end face forward extends out.

4. concave groove cutoff tool as claimed in claim 3, which is characterized in that first cutter head side end face is inclined-plane, described First cutter head side end face is higher than the side of knife handle, and first cutter head side end face upper end is stretched out to side.

5. concave groove cutoff tool as claimed in claim 4, which is characterized in that the first cutter head front end face and two the first knives Transition face is equipped between head side end face, the transition face is arc surface.

6. concave groove cutoff tool as described in any one in claim 1-5, which is characterized in that table on the knife handle on the knife handle top The knife handle lower surface of face and knife handle lower part offers groove used for positioning.

7. concave groove cutoff tool as described in any one in claim 1-5, which is characterized in that the end side of the knife handle is set There is the second cutter head with knife handle one, second cutter head structure is identical as the first cutter head.