阅读说明：本技术 一种内孔及孔底端面一体加工刀具 (Hole and hole bottom end face integrated processing cutter ) 是由 袁超 张国威 周荣立 于洪松 杨启帆 于 2020-12-24 设计创作，主要内容包括：一种涉及镗刀技术领域的内孔及孔底端面一体加工刀具,包含刀柄和刀块；所述刀柄的头端设有刀块,刀柄的尾端设有装夹部；所述刀块顶部前侧设有镗孔切削刃,所述镗孔切削刃的主偏角k-(rⅠ)为90°,镗孔切削刃的后角α-(oⅠ)为10～20°,镗孔切削刃的侧后角α-f为20°；所述刀块顶部背离刀柄的一侧设有平底切削刃,该平底切削刃沿刃口方向间隔设有多个圆弧凹槽,所述圆弧凹槽与平底切削刃的后刀面之间设有夹角θ,该夹角θ的角度值为3～5°,且夹角θ的尖端朝上设置,圆弧凹槽对应平底切削刃刃口位置的槽深为0.15～0.2mm,平底切削刃的主偏角k-(rⅡ)为35～45°；本发明集镗孔和平底于一体,能够有效提高加工效率,加工精度较高。(An inner hole and hole bottom end face integrated processing cutter relates to the technical field of boring cutters and comprises a cutter handle and a cutter block; the head end of the knife handle is provided with a knife block, and the tail end of the knife handle is provided with a clamping part; the front side of the top of the cutter block is provided with a boring cutting edge, and the main deflection angle k of the boring cutting edge rⅠ Is 90 DEG, and the clearance angle alpha of the boring cutting edge oⅠ Is 10-20 degrees, and the side back angle alpha of the boring cutting edge f Is 20 degrees; one side of the top of the knife block deviating from the knife handle is provided with a flat-bottom cutting edge, the flat-bottom cutting edge is provided with a plurality of arc grooves at intervals along the cutting edge direction, an included angle theta is arranged between the arc grooves and the rear knife face of the flat-bottom cutting edge, the angle value of the included angle theta is 3-5 degrees, the tip of the included angle theta is arranged upwards, the groove depth of the arc groove corresponding to the cutting edge position of the flat-bottom cutting edge is 0.15-0.2 mm, and the main deflection angle k of the flat-bottom cutting rⅡ 35 to 45 degrees; the invention integrates the boring hole and the flat bottom, can effectively improve the processing efficiency and has higher processing precision.)

1. The utility model provides an inner hole and hole bottom end face integrated into one piece processing cutter, characterized by: comprises a knife handle (1) and a knife block (2); the head end of the knife handle (1) is provided with a knife block (2), and the tail end of the knife handle (1) is provided with a clamping part (3); a boring cutting edge (2-1) is arranged on the front side of the top of the cutter block (2), and a main deflection angle k of the boring cutting edge (2-1)_rⅠIs 90 degrees, and the back angle alpha of the boring cutting edge (2-1)_oⅠIs 10-20 degrees, and the side back angle alpha of the boring cutting edge (2-1)_fIs 20 degrees; one side of the top of the knife block (2) deviating from the knife handle (1) is provided with a flat cutting edge (2-2), the flat cutting edge (2-2) is provided with a plurality of arc grooves (2-3) at intervals along the cutting edge direction, an included angle theta is arranged between the arc grooves (2-3) and the rear knife face of the flat cutting edge (2-2), the angle value of the included angle theta is 3-5 degrees, the tip of the included angle theta is arranged upwards, the groove depth of the arc grooves (2-3) corresponding to the cutting edge position of the flat cutting edge (2-2) is 0.15-0.2 mm, and the main deflection angle k of the flat cutting edge (2-2)_rⅡIs 35-45 DEG, and the clearance angle alpha of the flat bottom cutting edge (2-2)_oⅡ20 to 25 degrees; a rake angle gamma of the cutter block (2)_oIs 10 to 15 degrees.

2. The tool for integrally machining an inner bore and a bottom end surface of a bore according to claim 1, wherein: the knife block (2) and the knife handle (1) are of an integrated structure.

3. The tool for integrally machining an inner bore and a bottom end surface of a bore according to claim 1, wherein: the knife block (2) and the knife handle (1) are of detachable structures.

4. The tool for integrally machining an inner bore and a bottom end surface of a bore according to claim 1, wherein: clearance angle alpha of boring cutting edge (2-1)_0ⅠIs 15 deg..

5. The tool for integrally machining an inner bore and a bottom end surface of a bore according to claim 1, wherein: the main deflection angle k of the flat bottom cutting edge (2-2)_rⅡIs 35 deg..

6. The tool for integrally machining an inner bore and a bottom end surface of a bore according to claim 1, wherein: a rake angle gamma of the cutter block (2)₀Is 10 deg..

Technical Field

The invention relates to the technical field of boring cutters, in particular to a cutter for integrally processing an inner hole and a hole bottom end face.

Background

The inner hole turning tool supplied in the market is mainly used for processing the wall of an inner hole, and the tool point needs to cross the rotation center of a part when the bottom of the hole is processed, so that the diameter of a boring tool bar has a large influence on the integral rigidity of the tool, and particularly for processing the bottom end face of a deep long hole with the length-diameter ratio of more than 7 times, the existing inner hole turning tool can not meet the technical requirements all the time, the tool vibration phenomenon often occurs, and the processing precision can not meet the technical requirements provided by customers; such a phenomenon is a problem to be solved by those skilled in the art.

Disclosure of Invention

In order to overcome the defects in the background technology, the invention discloses an integral machining tool for an inner hole and a hole bottom end surface.

In order to achieve the purpose, the invention adopts the following technical scheme:

a cutter for integrally processing an inner hole and a hole bottom end surface comprises a cutter handle and a cutter block; the head end of the knife handle is provided with a knife block, and the tail end of the knife handle is provided with a clamping part; the front side of the top of the cutter block is provided with a boring cutting edge, and the main deflection angle k of the boring cutting edge_rⅠIs 90 DEG, and the clearance angle alpha of the boring cutting edge_oⅠIs 10-20 degrees, and the side back angle alpha of the boring cutting edge_fIs 20 degrees; one side of the top of the knife block deviating from the knife handle is provided with a flat-bottom cutting edge, the flat-bottom cutting edge is provided with a plurality of arc grooves at intervals along the cutting edge direction, an included angle theta is arranged between the arc grooves and the rear knife face of the flat-bottom cutting edge, the angle value of the included angle theta is 3-5 degrees, the tip of the included angle theta is arranged upwards, the groove depth of the arc groove corresponding to the cutting edge position of the flat-bottom cutting edge is 0.15-0.2 mm, and the main deflection angle k of the flat-bottom cutting_rⅡIs 35-45 DEG, and a clearance angle alpha of the flat bottom cutting edge_oⅡ20 to 25 degrees; the rake angle gamma of the knife block_oIs 10 to 15 degrees.

Preferably, the knife block and the knife handle are of an integrated structure.

Preferably, the knife block and the knife handle are of detachable structures.

Preferably, the clearance angle α of the boring cutting edge_0ⅠIs 15 deg..

Preferably, the major-rake angle k of the flat-bottomed cutting edge_rⅡIs 35 deg..

Preferably, theThe rake angle gamma of the knife block₀Is 10 deg..

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the cutter for integrally processing the inner hole and the bottom end face of the hole, disclosed by the invention, has a simple structure, integrates boring and flat bottom, and can effectively improve the processing efficiency, multiple experiments show that the cutting efficiency can be improved by more than 30% compared with that of the traditional cutter, and the roughness of the bottom end face of the hole of the inner hole of a workpiece can be improved by 2 grades; one side of the top of the cutter block, which is far away from the cutter handle, is provided with a flat-bottom cutting edge, the flat-bottom cutting edge is provided with a plurality of arc grooves at intervals along the direction of the cutting edge, so that the friction between the boring cutting edge and a workpiece during machining of the bottom end surface of the hole can be reduced, resonance can be effectively inhibited, the phenomenon of cutting vibration cutter is reduced, and the cutting efficiency and the surface quality of the bottom end surface of the hole in the workpiece are improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the cutter block;

FIG. 3 is a schematic structural view of a circular arc groove;

FIG. 4 is a schematic sectional view taken along the line A-A of the circular arc groove;

FIG. 5 is a schematic of a processing route when using the present invention.

In the figure: 1. a knife handle; 2. a cutter block; 2-1, boring a cutting edge; 2-2, a flat bottom cutting edge; 2-3, arc grooves; 3. and a clamping part.

Detailed Description

The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.

With reference to the attached drawings 1-5, an inner hole and hole bottom end face integrated machining tool comprises a tool handle 1 and a tool block 2; the head end of the knife handle 1 is provided with a knife block 2, and the tail end of the knife handle 1 is provided with a clamping part 3; a boring cutting edge 2-1 is arranged on the front side of the top of the cutter block 2, and a main deflection angle k of the boring cutting edge 2-1_rⅠIs 90 DEG, and the back angle alpha of the boring cutting edge 2-1_oⅠIs 10-20 degrees, and the side back angle alpha of the boring cutting edge 2-1_fIs 20 degrees; according to the needTo that end, the clearance angle alpha of the boring cutting edge 2-1_0ⅠThe angle is 15 degrees, the sharpness of the boring cutting edge 2-1 can be ensured, the cutting efficiency is improved, the structural strength of the boring cutting edge 2-1 can be ensured, and the service life is prolonged; one side of the top of the cutter block 2, which is far away from the cutter handle 1, is provided with a flat-bottom cutting edge 2-2, and the flat-bottom cutting edge 2-2 is provided with a plurality of arc grooves 2-3 at intervals along the cutting edge direction, so that the friction force between the boring cutting edge 2-1 and a workpiece when the bottom end surface of a hole is machined can be reduced, resonance can be effectively inhibited, the phenomenon of cutting vibration is reduced, and the cutting efficiency and the surface quality of the bottom end surface of the hole in the workpiece are improved; an included angle theta is arranged between the arc groove 2-3 and the rear cutter face of the flat-bottom cutting edge 2-2, the angle value of the included angle theta is 3-5 degrees, the tip end of the included angle theta is arranged upwards, the groove depth of the arc groove 2-3 corresponding to the cutting edge of the flat-bottom cutting edge 2-2 is 0.15-0.2 mm, and the main deflection angle k of the flat-bottom cutting edge 2-2_rⅡIs 35-45 degrees, namely the main deflection angle k of the flat bottom cutting edge 2-2 can be properly increased according to different processed materials_rⅡThe method is used for improving the processing efficiency and the surface roughness of the hole bottom of the inner hole of the workpiece; the major rake angle k of the flat bottom cutting edge 2-2 according to requirements_rⅡIs 35 degrees; relief angle alpha of flat bottom cutting edge 2-2_oⅡ20 to 25 degrees; the rake angle gamma of the cutter block 2_o10 to 15 degrees; the rake angle γ of the block 2, as required₀Is 10 degrees; in addition, the knife block 2 and the knife handle 1 are of an integrated structure or a detachable structure, so that the structure is flexible, and the use is convenient.

When the tool is used, the tool handle 1 is arranged on a tool rest tower of a machine tool through the clamping part 3, the center height is aligned before processing, and the cutting edge of the flat-bottom cutting edge 2-2 is ensured to be consistent with the horizontal direction of a main shaft of the machine tool; during machining, the boring is firstly carried out by using the boring cutting edge 2-1, and then the hole bottom end face of the inner hole of the workpiece is flattened by using the flat bottom cutting edge 2-2.

The invention is not described in detail in the prior art; in the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.