CN213857294U

CN213857294U - Special flat tooth milling cutter of stainless steel

Info

Publication number: CN213857294U
Application number: CN202022228776.2U
Authority: CN
Inventors: 叶征炯
Original assignee: Changzhou Xute Jifeng Tools Co ltd
Current assignee: Changzhou Xute Jifeng Tools Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-08-03
Anticipated expiration: 2030-10-09

Abstract

The utility model discloses a special flat tooth milling cutter of stainless steel, including sword handle and cutting part, the sword handle is the columnar order structure, and the most advanced position of the transition face that the sword handle was ended with the cutting part is provided with keeps away the sky. This special flat tooth milling cutter of stainless steel, the rigidity that remains the cutter, increase the life of cutter, stability is stronger, avoid simultaneously through end tooth radius angle or chamfer angle design because of too sharply bringing the danger of tipping, improve end tooth durability, the darker first chip groove of groove depth is favorable to the protection blade when the cutting simultaneously, better rigidity that remains the cutter through the more shallow second chip groove of groove depth, avoid producing bonding wear and long-pending bits tumour easily when processing stainless steel work piece through the chip groove of different depths, the characteristics that have better chip removal.

Description

Special flat tooth milling cutter of stainless steel

Technical Field

The utility model relates to a milling cutter technical field, more specifically say, it relates to a special flat tooth milling cutter of stainless steel.

Background

A milling cutter is a rotating tool with one or more cutter teeth for milling. When in work, each cutter tooth cuts off the allowance of the workpiece in sequence and intermittently, and the milling cutter is mainly used for processing planes, steps, grooves, forming surfaces, cutting off the workpiece and the like on a milling machine. At normal temperature, the material of the cutting part has enough hardness to cut into the workpiece, so that the cutting tool has high wear resistance, does not wear, and prolongs the service life; the cutter can generate a large amount of heat in the cutting process, particularly when the cutting speed is high, the temperature is high, therefore, the cutter material has good heat resistance, can still maintain high hardness at high temperature and has the performance of continuous cutting, and meanwhile, the cutter needs to bear large impact force, so the cutter material has high strength, otherwise, the cutter material is easy to break and damage, and the cutter is easy to break and crack due to the fact that the cutter can be impacted and vibrated. In the process of processing a stainless steel workpiece, the plasticity of the stainless steel is high, particularly the deep elongation of the austenitic stainless steel is 2.5 times that of 45# steel, the plastic deformation in the milling process is large, the cutting force is improved, the work hardening is serious, the heat strength is high, and the cutting curling and the breaking are difficult; meanwhile, when stainless steel is machined, cutting is not easy to break off during milling, and a cutter is easy to generate bonding abrasion and accumulated chip tumors under high temperature and high pressure.

In the cutting process, the cutting tool has strong requirements on the material of the cutting tool, and is also a key point for smoothly discharging accumulated chips generated in the using and machining process of the cutting tool, and meanwhile, the chip removal performance is better as the number of grooves is larger, so the width and the depth of a chip removal groove of the cutting tool are also required, and the existing four-edge milling cutter is equivalent to a two-edge milling cutter, the chip removal groove of the four-edge milling cutter is narrower, the chip removal performance is slightly poor, so that the surface roughness of a tool to be machined is easily increased, and even the tool is damaged. Aiming at the problem, a flat-tooth milling cutter special for stainless steel is designed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a special flat tooth milling cutter of stainless steel, it has the rigidity that remains the cutter, and stability is stronger, avoids producing the purpose of adhesive wear and tear and long-pending bits tumour and tipping easily when processing stainless steel work piece, has the characteristics of better chip removal.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the flat tooth milling cutter special for stainless steel comprises a blade handle and a blade part, wherein the blade handle is of a cylindrical structure, and a clearance is arranged at the tip position of a transition surface at the tail end of the blade handle and the blade part.

Furthermore, the materials of the blade handle and the blade part are hard alloy materials, the hard alloy materials are tungsten-cobalt fine-grain or ultra-fine-grain hard alloys containing TaC or NbC, and the hard alloy materials comprise YG6x, YG813, YW4 and YD 15.

According to the technical scheme, when stainless steel is milled, extreme pressure emulsion or vulcanized cutting oil is selected, the milling speed of the stainless steel milling cutter made of hard alloy is controlled to be 40-60 m/min, cutting of a cutting edge in a hardened layer is avoided, the cutter abrasion is accelerated, the feeding amount is larger than 0.1mm, the cutter edge of the stainless steel material is sharp, the hardness of the cutter edge is stronger, and the stainless steel workpiece can be conveniently machined.

Furthermore, the side face of the clearance peripheral surface is of a smooth cylindrical structure, and the diameter of the clearance part is smaller than that of the blade handle.

Through the technical scheme, the clearance length is increased, the effective edge length is reduced, the rigidity of the cutter is favorably improved, and the processing performance of the cutter is improved.

Further, the cutting part comprises a side edge, a bottom edge and a spiral groove, the side edge is of a double-arc structure, and the four adjacent side edges are in a threaded structure circumferential array.

Through above-mentioned technical scheme, be favorable to increasing the life of cutter.

Furthermore, the four adjacent bottom blades are sequentially 101 degrees, 78 degrees, 102 degrees and 78 degrees along the included angle formed by the central axis of the blade part and the side line of the adjacent bottom blade, a bottom blade inclined plane is arranged on one surface of each bottom blade, end teeth are arranged at the included angle between each bottom blade and each side blade, the surfaces of the end teeth are in a round angle or a right angle shape, and the thickness of each end tooth is increased by 1-2 millimeters on the basis of the existing thickness.

Through above-mentioned technical scheme, the design of unequal base blade makes the anti-seismic performance of cutter better, is favorable to increasing the stability of cutter, is favorable to improving the wearability of blade through the base blade inclined plane when the secondary cutting, increases end tooth surface thickness, effectively protects the end tooth, and is more wear-resisting, avoids simultaneously through end tooth radius angle or chamfer angle design because of too sharp-pointed danger that brings the tipping, improves the end tooth durability.

Further, the spiral groove comprises a first chip groove and a second chip groove, the first chip groove and the second chip groove are located between the two adjacent side edges, and the depth of the first chip groove is larger than that of the second chip groove.

Through the technical scheme, the cutting edge is protected favorably when the cutting is carried out through the first chip groove with the deeper groove depth, the rigidity of the cutter is better kept through the second chip groove with the shallower groove depth, the stability is stronger, and the bonding abrasion and the chip accumulation tumor are avoided being generated easily when the stainless steel workpiece is machined.

To sum up, the utility model discloses following beneficial effect has:

1. through setting up the cutting part, the cutting part includes side edge, end edge and helicla flute, and the helicla flute includes first chip groove and second chip groove, first chip groove and second chip groove are located two adjacent between the side edge, the degree of depth of first chip groove is greater than the degree of depth of second chip groove, has reached and has do benefit to the protection blade when the cutting through the darker first chip groove of groove depth, better remains the rigidity of cutter through the more shallow second chip groove of groove depth, and stability is stronger, avoids producing the purpose of adhesive wear and long-pending bits tumour easily when processing stainless steel work piece, has the characteristics of better processing stainless steel work piece and chip removal to it is narrower to have solved current four-edge milling cutter's chip groove, the problem that the chip removal performance is slightly poor.

Drawings

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

FIG. 2 is a sectional view of the bottom blade structure of the present invention;

fig. 3 is a sectional view of the first chip discharge groove structure of the present invention;

fig. 4 is a sectional view of a second chip groove structure of the present invention.

In the figure: 1. a blade shank; 2. a blade part; 3. avoiding the space; 4. a side edge; 5. a bottom edge; 6. a bottom edge bevel; 7. an end tooth; 8. a first chip discharge groove; 9. a second chip groove.

Detailed Description

Example (b):

the present invention will be described in further detail with reference to the accompanying fig. 1-4.

A special flat tooth milling cutter for stainless steel is shown in figures 1-4 and comprises a blade handle 1 and a blade part 2, wherein the blade handle 1 is of a cylindrical structure, and a clearance 3 is arranged at the tip position of a transition surface at the end of the blade handle 1 and the blade part 2.

Furthermore, the blade handle 1 and the blade part 2 are made of hard alloy materials, the hard alloy materials are tungsten-cobalt fine-grain or ultra-fine-grain hard alloys containing TaC or NbC, and the hard alloy materials comprise YG6x, YG813, YW4 and YD 15.

When stainless steel is milled, extreme pressure emulsion or vulcanized cutting oil is selected, the milling speed of a stainless steel milling cutter made of hard alloy is controlled to be 40-60 m/min, in order to avoid cutting of a cutting edge in a hardened layer and accelerate cutter abrasion, the feeding amount is larger than 0.1mm, the hardness of the cutting edge of the stainless steel material is stronger than that of the cutting edge of the stainless steel material, and the stainless steel workpiece can be conveniently machined.

Furthermore, the side surface of the periphery of the clearance 3 is of a smooth column structure, and the diameter of the clearance 3 part is smaller than that of the blade handle 1.

The length of the clearance 3 is increased, the effective edge length is reduced, the rigidity of the cutter is improved, and the processing performance of the cutter is improved.

Further, the blade part 2 comprises a side blade 4, a bottom blade 5 and a spiral groove, the side blade 4 is of a double-arc structure, and four adjacent side blades 4 are in a thread structure circumferential array.

Is beneficial to prolonging the service life of the cutter.

Furthermore, the included angles of the four adjacent bottom blades 5 formed by the central axis of the blade part 2 and the side lines of the adjacent bottom blades 5 are 101 degrees, 78 degrees, 102 degrees and 78 degrees in sequence, a bottom blade inclined plane 6 is arranged on one surface of each bottom blade 5, end teeth 7 are arranged at the included angles of the bottom blades 5 and the side blades 4, the surfaces of the end teeth 7 are in a round angle or right angle shape, and the thickness of the end teeth 7 is increased by 1-2 millimeters on the basis of the existing thickness.

Unequal end edge 5 designs the anti-seismic performance that makes the cutter better, is favorable to increasing the stability of cutter, is favorable to improving the wearability of blade through end edge inclined plane 6 when the secondary cutting, increases 7 surface thickness of end tooth, effectively protects end tooth 7, and is more wear-resisting, avoids simultaneously through 7 fillets of end tooth or chamfer angle designs avoiding because of too sharp-pointed danger that brings the tipping, improves 7 durability of end tooth.

Further, the helical flute comprises a first flute 8 and a second flute 9, the first flute 8 and the second flute 9 are positioned between two adjacent side edges 4, and the depth of the first flute 8 is greater than that of the second flute 9.

The first chip removal groove 8 with the deeper groove depth is beneficial to protecting the cutting edge during cutting, the second chip removal groove 9 with the shallower groove depth better keeps the rigidity of the cutter, the stability is stronger, and the bonding abrasion and the chip accumulation are avoided being easily generated during processing of stainless steel workpieces.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a special flat tooth milling cutter of stainless steel, includes sword handle (1) and cutting part (2), its characterized in that: the edge handle (1) is of a cylindrical structure, a clearance (3) is arranged at the tip position of a transition surface at the end of the edge handle (1) and the edge part (2), the edge part (2) comprises a side edge (4), a bottom edge (5) and a spiral groove, the spiral groove comprises a first chip discharge groove (8) and a second chip discharge groove (9), and the depth of the first chip discharge groove (8) is greater than that of the second chip discharge groove (9).

2. The stainless steel special flat tooth milling cutter according to claim 1, characterized in that: the blade handle (1) and the blade part (2) are made of hard alloy materials, and the hard alloy materials comprise YG6x, YG813, YW4 and YD 15.

3. The stainless steel special flat tooth milling cutter according to claim 1, characterized in that: the peripheral side surface of the clearance (3) is of a smooth cylindrical structure, and the diameter of the clearance (3) part is smaller than that of the blade handle (1).

4. The stainless steel special flat tooth milling cutter according to claim 1, characterized in that: the side edges (4) are of double-arc structures, and four adjacent side edges (4) are in a threaded structure circumferential array.

5. The stainless steel special flat tooth milling cutter according to claim 1, characterized in that: four adjacent end sword (5) are 101 °, 78 °, 102 ° and 78 ° in proper order along the center pin of cutting part (2) and the contained angle that adjacent end sword (5) sideline constitutes its shared angle, end sword inclined plane (6) have been seted up on end sword (5) surface, the contained angle of end sword (5) and side sword (4) is provided with end tooth (7), end tooth (7) surface is fillet or right angle shape, the thickness of end tooth (7) increases 1-2 millimeters on the basis of current thickness.

6. The stainless steel special flat tooth milling cutter according to claim 1, characterized in that: the first chip groove (8) and the second chip groove (9) are located between two adjacent side edges (4).