阅读说明：本技术 一种刀片结构、切割刀头及装夹方法 (Blade structure, cutting tool bit and clamping method ) 是由 吴建军 郑剑 曹建灵 于 2020-05-26 设计创作，主要内容包括：本发明适用于机械加工技术领域,提供了一种刀片结构、切割刀头及装夹方法。所述刀片结构包括：切割部用于对加工部件进行切割,且切割部上设置有用于切割部固定的槽型；连接部,用于对切割部压紧形式进行固定,且其端部设置有与槽型相适配的压合部；其中,压合部与槽型均为非圆形结构且相互嵌套进行形成定位结构。当切割的边部或者角部磨损后,松开固定件,转动切割部更换切割的角部或者边部,增加使用寿命。切割部不需要焊接在硬质合金基体上,切割部的整体强度会有提升。以压紧方式进行固定,能够有效防止切割部断裂。此类型切割部的整个前刀面,没有了传统刀片有前端焊接切深的限制。在整个刀片的边部和角部,都可以参加切削。(The invention is suitable for the technical field of machining and provides a blade structure, a cutting tool bit and a clamping method. The blade structure includes: the cutting part is used for cutting the processing part and is provided with a groove shape for fixing the cutting part; the connecting part is used for fixing the cutting part in a compression mode, and the end part of the connecting part is provided with a pressing part matched with the groove shape; the pressing part and the groove shape are both of non-circular structures and are mutually nested to form a positioning structure. When the cut edge or corner is worn, the fixing piece is loosened, and the cut corner or edge is replaced by rotating the cutting part, so that the service life is prolonged. The cutting part does not need to be welded on the hard alloy substrate, and the overall strength of the cutting part can be improved. Fix with compressing tightly the mode, can effectively prevent the fracture of cutting part. The entire rake face of this type of cutting portion is free of the limitations of conventional inserts with tip weld cut depths. Cutting can be performed at the edges and corners of the entire insert.)

1. A blade construction, comprising:

the cutting part is used for cutting the processing part, and a groove type used for fixing the cutting part is arranged on the cutting part:

the connecting part is used for fixing the cutting part in a compression mode, and the end part of the connecting part is provided with a pressing part matched with the groove shape;

the pressing part and the groove shape are both of non-circular structures and are mutually nested to form a positioning structure.

2. The blade structure of claim 1, wherein the cutting portion is a PCD compact.

3. The blade structure of claim 1 wherein the cutting portions and the slot patterns are concentrically arranged polygon structures of different sizes.

4. A blade construction according to claim 1, characterized in that the groove-shaped profile is provided on both sides of the cutting portion.

5. The insert structure as claimed in claim 4, wherein the inner wall of the groove is provided with an inclined wedge surface, the side wall of the pressing surface of the pressing portion is fixedly provided with a pressing inclined surface, the pressing inclined surface is nested and matched with the inclined wedge surface, and the inclined wedge surface is contacted with the pressing inclined surface when the pressing portion and the groove are nested.

6. A cutting bit, comprising:

the driving part is connected with the driving component and provides cutting power; and the number of the first and second groups,

the blade structure of any of claims 1-5;

wherein, the connecting part is provided with a fixing hole, and the fixing piece passes through the fixing hole to detachably fix the connecting part on the driving part.

7. A cutting bit as claimed in claim 6, wherein a plurality of fixing holes are provided.

8. The cutter head according to claim 6, wherein the pressing surface of the connecting portion is fixedly provided with a limiting portion, the pressing surface of the driving portion is provided with a groove adapted to the limiting portion, and when the connecting portion is fixed on the driving portion, the limiting portion is nested inside the groove.

9. The cutting bit of claim 8, wherein the limiting portion is disposed at an end of the connecting portion distal from the nip portion.

10. A method of clamping a blade structure for use with a cutting bit according to claim 8, the method comprising:

nesting the pressing part in the groove-shaped part to enable the cutting part to be connected to one end of the connecting part;

the fixing piece penetrates through the fixing hole to be connected to the driving part, and the driving part and the connecting part clamp the cutting part;

after the cutting end of the cutting part is abraded, the fixing piece is loosened, the cutting end is replaced by rotating the driving part, and the fixing piece is fastened to compress the cutting part for fixing.

Technical Field

The invention belongs to the technical field of machining, and particularly relates to a blade structure, a cutting tool bit and a clamping method.

Background

The indexable insert is an insert which is mechanically clamped on a cutter body and is used by indexing with a blunt cutting edge without grinding. Most indexable cutting tools use cemented carbide, but also ceramics, polycrystalline cubic boron nitride or polycrystalline diamond.

The conventional process for manufacturing the PCD indexable blade is usually realized by processing a welding position on a hard alloy blade, welding a PCD composite sheet on the hard alloy blade (also becoming a hard alloy matrix or a hard alloy blade matrix), and processing a cutting edge for cutting on the PCD composite sheet. Conventional PCD inserts are typically screwed through an internal bore to compress the insert. The middle of the blade is provided with one more hole, so that the strength of the blade is reduced, and the blade is easy to break when the cutting force is large. And the PCD composite sheet is welded on the hard alloy blade, the overall strength of the blade is reduced by welding usually, and the service life of the blade is influenced.

Disclosure of Invention

The embodiment of the invention aims to provide a blade structure, and aims to solve the problems of easy breakage and short service life.

The embodiment of the present invention is achieved as follows, in a blade structure, the blade structure including:

the cutting part is used for cutting the processing part and is provided with a groove shape for fixing the cutting part;

the connecting part is used for fixing the cutting part in a compression mode, and the end part of the connecting part is provided with a pressing part matched with the groove shape;

the pressing part and the groove shape are both of non-circular structures and are mutually nested to form a positioning structure.

In a preferred embodiment of the invention, the pressing part 7 is nested inside the groove type 2, the lower part of the connecting part 5 presses the cutting part, so that the cutting part is fixed, the edge corner part of the cutting part cuts the processing part, the cutting part is subjected to a deflection force, and the cutting part cannot rotate under the interaction of the pressing part 7 and the groove type 2, so that the cutting is carried out, and the stability of the cutting part is improved. When the cutting edge of the cutting part is worn, the connecting part 5 is loosened, and the cutting edge of the cutting part is replaced, so that the cutting part can be fully utilized, and the limitation that the traditional blade has the front end to be welded and cut deeply is avoided. The cutting can be performed within the size of the whole blade. Meanwhile, a hard alloy matrix is omitted, the hard alloy on the bottom layer of the blade is directly used, and the process of opening the welding position is omitted. And the disassembly and the assembly are convenient and fast.

It is another object of an embodiment of the present invention to provide a cutting bit, including:

the driving part is connected with the driving component and provides cutting power; and the number of the first and second groups,

the blade structure described above;

wherein, the connecting part is provided with a fixing hole, and the fixing piece passes through the fixing hole to detachably fix the connecting part on the driving part.

Another object of an embodiment of the present invention is to provide a method for clamping a blade structure, which is applied to the cutting insert described above, the method for clamping includes:

nesting the pressing part in the groove-shaped part to enable the cutting part to be connected to one end of the connecting part;

the fixing piece penetrates through the fixing hole to be connected to the driving part, and the driving part and the connecting part clamp the cutting part;

starting the driving part and moving the cutting part to process and cut the part;

after the cutting end of the cutting part is abraded, the fixing piece is loosened, the cutting end is replaced by rotating the driving part, and the fixing piece is fastened to compress the cutting part for fixing.

According to the blade structure provided by the embodiment of the invention, after the cut edge part or corner part is abraded, the fixing part is loosened, the cutting part is rotated to replace the cut corner part or edge part, the cutting part does not need to be welded on a hard alloy substrate, and the integral strength of the cutting part can be improved. The fixing is carried out in a compression mode, and the cutting part can be effectively prevented from being broken due to strength reduction of the cutting part caused by the central hole of the cutting part. The entire rake face of this type of cutting portion is free of the limitations of conventional inserts with tip weld cut depths. Cutting can be performed at the edges and corners of the entire insert. Meanwhile, a hard alloy matrix is omitted, and the process of opening the welding position is omitted.

Drawings

FIG. 1 is a block diagram of a blade in a blade configuration provided by an embodiment of the present invention;

fig. 2 is a schematic front view of a connecting portion in a blade structure according to an embodiment of the present invention;

fig. 3 is a left side view schematic diagram of a connecting portion in a blade structure according to an embodiment of the present invention;

fig. 4 is a schematic rear view of a connecting portion in a blade structure according to an embodiment of the present invention;

FIG. 5 is a schematic view of a cutting head according to an embodiment of the present invention;

in the drawings: the cutting tool comprises a blade 1, a groove type 2, an inclined wedge surface 4, a connecting part 5, a protruding strip 6, a pressing part 7, a fixing hole 8, a pressing inclined surface 9, a pressing strip 10, a tool bar 11 and a screw 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

As shown in fig. 1, a structure diagram of a blade structure provided for an embodiment of the present invention includes:

the cutting part is used for cutting the processing part, and a groove type 2 for fixing the cutting part is arranged in the cutting part;

the connecting part 5 is used for fixing the cutting part in a pressing mode, and the end part of the connecting part is provided with a pressing part 7 matched with the groove type 2;

the pressing part 7 and the groove type 2 are both of non-circular structures and are nested with each other to form a positioning structure. The stitching part 7 is nested in the groove type 2, or the groove type 2 is nested in the stitching part 7, so that the connection between the connecting part 5 and the cutting part is carried out, the relative rotation between the connecting part 5 and the cutting part is avoided, the edge part or the corner part of the cutting part cuts the processing part, the cutting part is subjected to deflection force, and the cutting part cannot rotate under the interaction between the stitching part 7 and the groove type 2, so that the cutting is carried out.

In the embodiment of the invention, the pressing part 7 is nested in the groove type 2, the lower part of the connecting part 5 presses the cutting part tightly, so that the cutting part is fixed, the edge corner part of the cutting part cuts the processed part, the cutting part is subjected to deflection force, and the cutting part cannot rotate under the interaction of the pressing part 7 and the groove type 2, so that the cutting is carried out, and the stability of the cutting part is improved. When the cutting edge of the cutting part is worn, the connecting part 5 is loosened, and the cutting edge of the cutting part is replaced, so that the cutting part can be fully utilized, and the limitation that the traditional blade has the front end to be welded and cut deeply is avoided. The cutting can be performed within the size of the whole blade. Meanwhile, a hard alloy matrix is omitted, the hard alloy on the bottom layer of the blade is directly used, and the process of opening the welding position is omitted. And the disassembly and the assembly are convenient and fast.

In one example of the present invention, the cutting portion may be a PCD compact, high speed steel, cemented carbide (metal containing ceramic), ceramic, PCBN (cubic boron nitride), or the like. May be provided as a blade 1, block, etc., while being provided in a polygonal configuration. Among them, it is more suitable for a PCD compact.

As shown in fig. 1, as a preferred embodiment of the present invention, the cutting portion and the groove 2 are concentrically arranged in a polygonal structure with different sizes, so that the cutting portion and the groove can be adjusted as required, and the edge or the corner of the cutting portion is contacted with the cutting plane for cutting, thereby improving the cutting utilization rate of the edge or the corner of the cutting portion, and simultaneously facilitating the mutual nesting and positioning of the groove 2 and the pressing portion 7, and reducing the installation difficulty.

Of course, the groove 2 and the press-fit portion 7 may have other non-circular structures, such as insections, star-shaped structures, etc., which have high strength but are inconvenient to position.

As shown in fig. 1, as a preferred embodiment of the present invention, the groove patterns 2 are disposed on both sides of the cutting portion and are symmetrically disposed, i.e., non-penetrating or penetrating, so that the pressing surface of the cutting portion can be adjusted to facilitate the full use of the cutting edge or corner of the cutting portion.

As shown in fig. 1 and 4, as another preferred embodiment of the present invention, the inner side wall of the groove type 2 is provided with an inclined wedge surface 4, the side wall of the pressing surface of the pressing part 7 is fixedly provided with a pressing inclined surface 9, the pressing inclined surface 9 is nested and adapted with the inclined wedge surface 4, when the pressing part 7 is nested with the groove type 2, the inclined wedge surface 4 is in contact with the pressing inclined surface 9, and the pressing inclined surface 9 presses the inclined surface inside the inclined wedge surface 4, thereby ensuring the clamping precision and the clamping strength.

As shown in fig. 5, an embodiment of the present invention further provides a cutting bit, including:

the driving part is connected with the driving component and provides cutting power; and the number of the first and second groups,

connecting portion 5 and cutting part, wherein have seted up fixed orifices 8 on the connecting portion 5, the mounting passes fixed orifices 8 and fixes connecting portion 5 detachably on the drive division, and the drive division is connected on drive equipment, and under drive equipment's effect, the drive division activity to impel the cutting part to slide, cut with this.

In the embodiment of the invention, the fixing piece penetrates through the fixing hole 8 to fix the connecting part 5 on the driving part, the pressing part 7 is pressed in the groove type 2, the connecting part 5 and the driving part interact to press the cutting part, the driving part is connected to the driving device, and under the action of the driving device, the driving part moves, so that the cutting part is driven to slide, and therefore cutting is carried out. Loosening the fixed piece, connecting portion 5 and drive division break away from to can change cutting portion cutting edge portion or bight, carry out a plurality of cutting edges or cutting bight to the cutting portion and use, increase the life of cutting portion, reduce the processing cost.

In one example of the present invention, the driving part may be a cutter bar 11, a cutting board, etc., the driving part is connected to a cutting machine, a lathe, etc., and the fixing part may be fixed by a screw 12, which is convenient and fast. Of course, other fixing forms, such as a snap connection, etc., may be used, and will not be described herein.

As a preferred embodiment of the present invention, one or more fixing holes 8 may be provided, and when a plurality of fixing holes 8 are provided, the fixing member passes through the fixing holes 8 to fix the connecting portion 5, so as to prevent the connecting portion 5 from rotating due to a deflection force during a cutting process, thereby increasing the connection stability of the connecting portion 5.

As shown in fig. 3, as a preferred embodiment of the present invention, a limiting portion is fixedly disposed on the pressing surface of the connecting portion 5, a groove adapted to the limiting portion is formed on the pressing surface of the driving portion, when the connecting portion 5 is fixed on the driving portion, the limiting portion is nested inside the groove, and the limiting portion has a limiting function, so that the connecting portion 5 is prevented from rotating when receiving a deflecting force. The limit portion may be provided as a protruding strip 6, a tooth-like structure, or the like. Of course, the limiting portion may be provided on the driving portion, and the groove is provided on the connecting portion 5, thereby limiting. Spacing portion can set up one or more, and a plurality of spacing portions are spacing, and the anti-migration effect is better.

As a preferred embodiment of the present invention, the position-limiting part is disposed at the end of the connecting part 5 far from the nip part 7, and the position-limiting part is disposed at the end of the connecting part 5, so that the moment of the anti-offset force is maximized, and the anti-offset capability is increased.

The embodiment of the invention also provides a blade structure clamping method, which is applied to the cutting head, and the clamping method comprises the following steps:

the pressing part 7 is nested inside the groove type 2, so that the cutting part is connected to one end of the connecting part 5;

the fixing piece penetrates through the fixing hole 8 to be connected to the driving part, and the driving part and the connecting part 5 clamp the cutting part;

starting the driving part and moving the cutting part to process and cut the part;

after the cutting end of the cutting part is abraded, the fixing piece is loosened, the cutting end is replaced by rotating the driving part, and the fixing piece is fastened to compress the cutting part for fixing.

In this embodiment, the effect of drive division and connecting portion 5 is pressed from both sides the cutting portion tightly, has avoided the cutting portion to rotate in the course of working, and the cutting portion cuts, and the limit portion or the bight back of cutting loosen the mounting, rotate the bight or the limit portion that the cutting portion changed the cutting, and the cutting portion need not weld on the carbide base member, and the bulk strength of cutting portion can promote. The fixing is carried out in a compression mode, and the cutting part can be effectively prevented from being broken due to strength reduction of the cutting part caused by the central hole of the cutting part. The entire rake face of this type of cutting portion is free of the limitations of conventional inserts with tip weld cut depths. The cutting can be performed within the size of the whole blade. Meanwhile, a hard alloy matrix is omitted, and the process of opening the welding position is omitted.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.