CN212042965U

CN212042965U - Barb groove cutter structure

Info

Publication number: CN212042965U
Application number: CN202020231491.1U
Authority: CN
Inventors: 张晓刚; 李新宇; 孙亚涛
Original assignee: Alstom Beizhong Power Beijing Co Ltd
Current assignee: Alstom Beizhong Power Beijing Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-12-01
Anticipated expiration: 2030-02-28

Abstract

The utility model relates to a machining field especially adopts the digit control machine tool to realize the field of processing, specifically is a barb groove cutter structure, including blade, cutting board and handle of a knife, the cutting board is whole to be the L type, and two turning arms of its L type are fixed arm and support arm respectively, the end of fixed arm with the handle of a knife installation is fixed, the end of support arm has a blade constant head tank, the blade is fixed in the blade constant head tank, and salient in the support arm, one side of the cutter direction of feed dorsad of blade constant head tank is for laminating and supporting the supporting shoe of blade. The utility model discloses the barb design that will be used for processing the inside groove has increased the intensity of cutter itself on the cutting board the end of the support arm of cutting board sets up a supporting shoe, provides holding power for the blade, strengthens the blade has effectively avoided the cutter relieving phenomenon at the rigidity of cutting in-process, has reduced the possibility of blade rupture, has improved processing product quality and machining efficiency.

Description

Barb groove cutter structure

Technical Field

The utility model relates to a machining field especially adopts the digit control machine tool to realize the field of processing, specifically is a barb groove cutter structure.

Background

In the steam turbine manufacturing industry, because the cylinder structure of the steam turbine is complex and the technological requirement is high, in the machining process, a plurality of parts with high machining difficulty can be encountered, wherein the barb groove is one part of a plurality of blade grooves in the steam turbine cylinder body.

In the prior art, a numerical control lathe is mostly adopted to process barb grooves, the structure of a cutter of the barb grooves is shown in fig. 1, the cutter mainly comprises a cutter head 11, a square cutter bar 12 and a cutter holder 13, the cutter head 11 is made of high-speed steel materials and is integrally L-shaped, the tail end of a crank arm at one side of the L shape is a cutting edge, the shape of the cutting edge is consistent with that of the barb groove to be processed, and the crank arm at the other side is mutually perpendicular and fixedly connected with the tail end of the cutter bar; the square cutter bar 12 is in a strip shape, the cross section of the square cutter bar is 25 multiplied by 25(mm), the tail end of the square cutter bar is in butt joint with the crank arm at the other side of the cutter head 11 by adopting a step structure, the cutter head 11 is clamped and fixed on the square cutter bar 12 by utilizing a pressing plate 14, and the other end of the square cutter bar 12 is directly clamped and fixed on a cutter holder 13 through a compression screw 15.

In the existing cutter structure, because the cutter head 11 is limited by a clamping mode and limited by the space in the barb groove, the thickness of the blade is limited, the rigidity of the cutter is poor, the cutter back-off phenomenon can be serious when the cutting force is large, the size is over-poor, the cutter back-off phenomenon can be eliminated only by repeated circular cutting during machining, the machining efficiency is low, and the machining quality is difficult to guarantee.

In addition, because the tool bit 11 is a special non-standard workpiece processed from high-speed steel according to the shape of the specific barb slot to be processed, and although the tool bit is sharp, the wear resistance is poor, small islands are left in the barb slot processed by the worn tool bit, the processing quality is difficult to guarantee, so that the tool bit needs to be frequently replaced, the service life of the tool bit is short, and the processing cost is high. If the hard alloy forming blade is used as the cutter head, the blade is easy to break due to poor rigidity, the broken blade is not easy to remove when being clamped in the groove, and the subsequent repair is difficult. And because the cutter head or the cutter blade adopts a non-standard workpiece, the chip breaker groove is difficult to process and repair, long iron chips are easy to wind on the cutter in the process of processing, the cutter is damaged by extrusion, the cutter is blocked in the groove, or the surfaces of other processed grooves are damaged.

On the other hand, in any type of tool bit, wear occurs after a certain period of cutting work, and therefore, it is necessary to replace a new tool bit or a tool having a new tool bit mounted thereon in time. In the prior art, when a new cutter is replaced, the square cutter bar 12 needs to be pressed laterally and vertically by using the compression screws 15 on the side surfaces, the cutter handle 13 is in planar contact with the square cutter bar 12 and is screwed and fixed only by using the two compression screws 15, and in the process of screwing the compression screws 15, the rotation force is transmitted to the square cutter bar 12 by the rotation of the compression screws 15, so that the square cutter bar 12 is stressed and inclined in the fixing process, the fixing position between the cutter bar 12 and the cutter handle 13 is difficult to ensure, and the deviation between the cutting edge of the cutter head 11 and the barb groove to be machined is caused. Therefore, the tool needs to be recalibrated and compensated after the tool is set; meanwhile, in the cutting process, the cutter head 11 is subjected to external force, so that the cutter body is unstable in clamping and topples over to cause the barb groove to deviate in position, and further unqualified processing or even scrapped result is caused.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes above-mentioned shortcoming provides an intensity height, processing accurate efficient barb groove cutter structure.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a barb groove cutter structure, includes blade, cutting board and handle of a knife, the cutting board wholly is the L type, and two turning arms of its L type are fixed arm and support arm respectively, the end of fixed arm with the handle of a knife installation is fixed, the end of support arm has a blade constant head tank, the blade is fixed in the blade constant head tank, and outstanding in the support arm, the one side of the cutter direction of feed dorsad of blade constant head tank, for laminating and supporting the supporting shoe of blade.

Further, a side of the blade positioning groove facing the cutter feeding direction may be a tongue having a guide slope.

Further, the outer sidewall of the support block may have an interference preventing slope or curved surface.

Furthermore, the knife board can be provided with a compression gap communicated with the blade positioning groove, a compression screw vertically penetrates through the compression gap, and the size of the compression gap is adjusted when the compression screw is screwed.

Further, the blade may employ a grooving blade with a chip breaker groove.

Furthermore, a plurality of bolt holes can be formed in the tail end of the fixing arm of the cutter plate, corresponding bolt holes are formed in one end of the cutter handle, and the cutter plate and the cutter handle are fixedly connected with one end of the cutter handle through fastening bolts.

Furthermore, the tail end of the fixing arm can be provided with a positioning key/key groove, correspondingly, the corresponding position of the knife handle is provided with a key groove/positioning key, and when the fixing arm of the knife board is connected and fixed with the knife handle, the positioning key/key groove at the tail end of the fixing arm is tightly matched with the key groove/positioning key of the knife handle.

Further, the other end of the tool shank can adopt a connecting structure with a standard CAPTO interface.

Further, the bolt holes and the key grooves/positioning keys at one end of the cutter handle can be two groups which are arranged in a double-sided axial symmetry mode.

The utility model discloses the barb design that will be used for processing the inside groove has increased the intensity of cutter itself on the cutting board the end of the support arm of cutting board sets up a supporting shoe, provides holding power for the blade, strengthens the blade rigidity in cutting process has effectively avoided the cutter relieving phenomenon, very big reduction the possibility of blade rupture, has improved processing product quality and machining efficiency. In addition, the pressing tongue with the guide slope presses the blade and pushes generated scraps to the front, and the scraps are smoothly discharged along the cutting direction in the process of machining the workpiece. The fixed arm end with the handle of a knife adopts navigation key and keyway location of mutually supporting, and in use, the installation is swift convenient, need not spend a large amount of time to straighten the cutter just can guarantee with the groove level of processing, consequently can realize online quick tool changing, has greatly improved machining efficiency. The blade adopts a commercially available grooving blade with a chip breaker groove, the cost of the blade is low, and the market competitiveness of the product is strong.

Drawings

FIG. 1 is a schematic view of a prior art cutting tool;

fig. 2 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 3 is a perspective view of a preferred embodiment of a blade and a cutting board;

FIG. 4 is a schematic view of the structure of the tool shank in the preferred embodiment.

Detailed Description

As shown in fig. 2, for a structural schematic diagram of a preferred embodiment of the present invention, the embodiment includes a blade 21, a cutting board 22 and a handle 23, the cutting board 22 is overall L-shaped, two turning arms of the L-shaped cutting board are respectively a fixing arm 221 and a supporting arm 222, and the end of the fixing arm 221 is fixed to the handle 23. The tail end of the fixing arm 221 of the knife board 22 is provided with a plurality of bolt holes 25, bolts penetrate through the knife board 22 and are locked with one end of the knife handle 23 to achieve fixed connection, and the other end of the knife handle 23 adopts a standard CAPTO interface 28.

As shown in fig. 3, which is a perspective view of the blade and the knife board in the preferred embodiment, wherein the end of the supporting arm 222 has a blade positioning slot 226, the blade 21 is fixed in the blade positioning slot 226 and protrudes from the supporting arm 222, a side of the blade positioning slot 226 facing away from the feeding direction of the cutter is a supporting block 223 for attaching and supporting the blade 21, and a side of the blade positioning slot 226 facing the feeding direction of the cutter is a tongue 224 with a chip removal guiding slope. Therefore, the support arm 222 and the blade 21 arranged at the tail end of the support arm form an inner groove processing barb, the strength of the cutter is increased, the support block 223 supports the blade 21, the strength of the blade 21 in the cutting operation process is increased, enough rigidity is ensured, the blade back-off phenomenon is avoided, the blade abrasion is small, and the processing quality of the groove is not influenced. The pressing tongue 224 with the guide slope ensures that the waste chips are discharged forwards along the guide slope while pressing the blade 21, so that the waste chips can be smoothly guided out and arranged in front of the barb groove, the cutting of the blade is not influenced, and the processing quality of the groove is not influenced because the waste chips are not smoothly discharged to crush the blade 21.

The blade 21 can be according to the barb groove shape of waiting to process, and processing is required shape and size, also can adopt the grooving blade that has the chip breaker of market, realizes good chip breaking, and the material that will cut off forms the piece and is convenient for discharge outside the groove to, the grooving blade of chooseing for use is batch production's standard accessory, can be according to the processing needs of difference, selects appropriate cell type and material, selects various, economical and practical, effectual reduction in production cost. The knife plate 22 is provided with a compression gap 225 communicated with the blade positioning groove 226, a compression screw 24 vertically penetrates through the compression gap 225, when the compression screw 24 is screwed, the size of the compression gap 225 is adjusted, and then the blade 21 is loosened or compressed when the blade 21 is replaced. When the blade 21 is replaced, the blade 21 is firstly placed in the blade positioning groove 226, and after the blade is pushed to the limiting root of the blade positioning groove 226, the compression screw 24 is locked, at this time, the compression gap 225 becomes smaller, the compression tongue 224 is pushed to compress the blade 21, and the blade 21 is firmly locked.

The lateral wall of supporting shoe 23 has the interference curved surface of preventing, through rational design the interference point is got rid of to the inscribed circle diameter scope of interference curved surface of preventing, can not produce the friction and vibrate in the course of working, does not press from both sides the sweeps, has effectively avoided the damage to the cell wall, simultaneously, guarantees the support intensity to blade 21, avoids the cutter relieving phenomenon in the processing. The lateral wall of supporting shoe 23 also can design for preventing interfering the inclined plane, prevents interfering the gradient on inclined plane through rational design, also can reach good prevent dry and relate to the support effect to the blade.

As shown in fig. 4, the structure of the knife handle in the preferred embodiment is schematically illustrated. One end of the knife handle 23 is provided with a positioning key 27, and correspondingly, in combination with fig. 2 and 3, the tail end of the fixing arm 221 of the knife board 22 is provided with two key slots 26 perpendicular to the cutting edge direction of the blade 21, and when the fixing arm 221 of the knife board is fixedly connected with the knife handle 23, the key slot 26 at the tail end of the fixing arm 221 is tightly matched with the positioning key 27 of the knife handle 23. The tail end of the fixing arm of the cutting board is provided with a plurality of bolt holes 25, one end of the knife handle is provided with corresponding bolt holes, and the cutting board and the knife handle are fixedly connected with one end of the knife handle through fastening bolts (not marked in the figure). When the cutting board 22 is mounted on the tool holder 23, the positioning key 27 needs to be aligned with the key groove 26 for meshing, and then the fastening bolt is screwed down to realize accurate mounting and fixing of the cutting board and the tool holder. Consequently when cutting board 22 or blade 21 need be changed, utilize the restriction of navigation key 27 and keyway 26, make the installation location of cutting board 22 more accurate, cutting board 22 and blade 21 can not take place horizontal displacement because of revolving the atress of twisting, effectively avoid the installation in-process, the deviation takes place for the angle of cutting edge, it also does not take place the displacement to receive the cutting force, play the location and have supplementary driven effect of taking concurrently, the cutter that installs only needs to carry out the work piece tool setting at zero point, can carry out the program after the completion, exchange efficiency and precision have greatly been improved. Similarly, if the tail end of the fixing arm is provided with a positioning key, correspondingly, the corresponding position of the knife handle is provided with a key groove, and the effect of leading to tight fit can be achieved. The other end of the tool shank 23 adopts a standard CAPTO interface 28, and can be designed into other forms or specifications according to the type of the machine tool and the spindle thereof.

The bolt holes and the positioning keys/key grooves at one end of the cutter handle 23 are two groups which are arranged in a double-sided axial symmetry mode, namely the positioning keys 27 and 27' in figure 2 and the back in figure 4 are invisible, and in the machining process, the cutting machining is possibly required to be respectively carried out from the left direction and the right direction, so that the cutter handle adopts a double-sided design and is corresponding, the cutter plate can be designed into the left installation direction and the right installation direction according to the requirement, the cutter plates in the left direction and the right direction can share the same cutter handle, and the machining resources and materials are saved to a certain extent.

The barb groove tool structure provided by the utility model is described in detail, and the principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a barb groove cutter structure which characterized in that: including blade, cutting board and handle of a knife, the cutting board is whole to be the L type, and two turning arms of its L type are fixed arm and support arm respectively, the end of fixed arm with the handle of a knife installation is fixed, the end of support arm has a blade constant head tank, the blade is fixed in the blade constant head tank, and outstanding in the support arm, the one side of the cutter direction of feed that is dorsad of blade constant head tank, for the laminating and support the supporting shoe of blade.

2. The barb channel tool structure of claim 1, wherein: and one side of the blade positioning groove facing to the feeding direction of the cutter is provided with a pressing tongue with a guide slope.

3. The barb channel tool structure of claim 1, wherein: the lateral wall of supporting shoe has interference-proof inclined plane or curved surface.

4. The barb channel tool structure of claim 1, wherein: the knife board is provided with a compression gap communicated with the blade positioning groove, a compression screw vertically penetrates through the compression gap, and the size of the compression gap is adjusted when the compression screw is screwed.

5. The barb channel tool structure of any of claims 1-4, wherein: the blade adopts a grooving blade with a chip breaker groove.

6. The barb channel tool structure of any of claims 1-4, wherein: the end of the fixed arm of the cutting board is provided with a plurality of bolt holes, one end of the knife handle is provided with corresponding bolt holes, and the cutting board and the knife handle are fixedly connected with one end of the knife handle through fastening bolts.

7. The barb channel tool structure of claim 6, wherein: the fixing arm is characterized in that a positioning key/key groove is formed in the tail end of the fixing arm, correspondingly, a key groove/positioning key is arranged at the corresponding position of the knife handle, and when the fixing arm of the knife board is fixedly connected with the knife handle, the positioning key/key groove in the tail end of the fixing arm is tightly matched with the key groove/positioning key groove of the knife handle.

8. The barb channel tool structure of claim 6, wherein: the other end of the knife handle adopts a connecting structure with a standard CAPTO interface.

9. The barb channel tool structure of claim 6, wherein: the bolt holes and the key grooves/positioning keys at one end of the cutter handle are two groups which are arranged in a double-sided axial symmetry mode.