CN211588667U

CN211588667U - Cutting tool

Info

Publication number: CN211588667U
Application number: CN201922454399.1U
Authority: CN
Inventors: 孙东周; 何吉
Original assignee: Hangzhou Xien Xituosi Precision Machinery Co ltd
Current assignee: Hangzhou Xien Xituosi Precision Machinery Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-29
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a cutter belongs to the cutting technology field. The cutter comprises a cutter body, wherein a plurality of groups of blades which are spirally arranged are arranged on the side surface of the cutter body, and the plurality of groups of blades are arranged in a full-tooth unequal distance manner; the cutter body comprises a cutter body and a cutter head which are detachable and can be in clearance fit, and the matching surface of the cutter body and the cutter body comprises a plurality of sections of curved surfaces. The utility model discloses the cutter body adopts the multistage curved surface location with the tool bit, and the angle displacement that produces after the cooperation is less to it is effectual at both cooperation in-process interface dynamic balance. The blades are arranged in full-tooth unequal intervals, the blades on the whole cutter are arranged in a staggered mode relatively and uniformly, the continuity between the blades is good, and the gaps are small. The blade is firm, difficult not hard up, and the cutting is steady, can not produce great impact force, and machining efficiency is high.

Description

Cutting tool

Technical Field

The utility model relates to a cutting technical field, in particular to cutter.

Background

At present, the metal cutting processing field develops very fast, but transposition formula cutter obtains a large amount of applications, but the biggest benefit of using transposition formula cutter is that the cutter cost is lower, this mainly because but transposition formula cutter is mostly by modular design, and a section blade can be used to multiple cutter body, a cutter body accessible a series of standard interfaces and multiple handle of a knife combination for the commonality of cutter is easily promoted.

The main reasons for the development of the interfaces are that the standard is too low and the technology is not mature enough.

Taking a long-edge square shoulder milling cutter as an example, a common indexable long-edge square shoulder milling cutter is that a plurality of rows of blades are arranged on a cutter body, the bottommost blade and the blade seat thereof are stressed by large force and are most prone to collapse in the long-term cutting process of the cutter, if one of the blade seats collapses, the whole cutter is scrapped, and the cutter body of one long-edge square shoulder milling cutter is usually very expensive. The cost of the tool increases. If the long-edge square shoulder milling cutter is divided into two parts, a plurality of blade seats at the bottom are independently made into a module. If the bottommost insert seat is damaged, one insert head can be directly replaced, so that the use cost of the cutter can be reduced. In addition, since the long-edge square shoulder milling cutter has many points at which the workpiece and the insert simultaneously contact during cutting, the cutting force, vibration, bending of the cutter body due to stress, and the like should be controlled.

Chinese utility model patent with publication number CN204686145U discloses a combination form of a cutter head and a cutter body. This form of interface has the following disadvantages: 1. the single point is stressed, and when the cutter is subjected to cutting stress, the cutter is easy to wear prematurely only by the contact point, and both the cutter head and the cutter body can be damaged. 2. The angular displacement of the cutter head and the cutter body is large, if the contact point is worn, the back angle displacement can be continuously increased, and the cutting force cannot be controlled according to expectation. 3. The single direction is effective, and the single direction is only used for the tool with the main shaft rotating forwards or the tool with the main shaft rotating backwards. 4. The dynamic balance is not good, and an opening is formed on the whole circle, so that the balance effect on the circle is not good, the circular cutting machine is not suitable for high-speed cutting, and vibration can be generated in the cutting process. 5. The versatility is not good, and the interface can only be used for this type of tool, and other tools are not suitable.

Chinese patent application No. CN106825714B discloses a combined milling cutter, in which the overall cutter is composed of a plurality of cutter sets, and the cutter sets are stacked according to the required length of the cutter, which has the advantages that the length can be freely adjusted, but the disadvantages are more: 1. the interface between the knife tackle adopts cylinder centering and a very little pin location, transfers the moment of torsion with this kind of little pin, and the cutter can not bear big moment of torsion, and the pin atress damages and is difficult to take out in the hole and leads to whole knife tackle to scrap. 2. Because the small pins transmit torque and the cutter sets are overlapped layer by layer, cutting force is overlapped from the bottom surface of the cutter, and the uppermost cutter set bears very large torque. The structure can be used for infinitely superposing the cutter sets as long as the central screw is long enough in theory, so that the cutting length of the cutter is increased, but actually, the unstable cutter set positioning pin at the uppermost layer is required to bear very large torque due to the fact that the cutter sets are superposed layer by layer, and the number of layers which cannot be superposed is determined to be too large. 3. The tool does not comply with the dynamic balance design principle. 4. The versatility is not good. 5. The blade is in a staggered tooth structure, the number of effective teeth is two, the processing efficiency is not high, and only even number of teeth can be designed. 6. The cutter is distributed on the circumference, and some places are too concentrated, and some places have too large gaps, so that sudden stress and sudden complete cancellation force can be caused during cutting, and cutting vibration is easy to generate. 7. The bottom most cutter set has two pin holes open to the outside where chips, dirt, grease, etc. are easily entered and wind sounds may also be caused.

In summary, the long-edge square shoulder milling cutter on the market at present has various serious defects, such as the arrangement design of the interfaces and the blades.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cutter can solve one or several kinds among the above-mentioned prior art problem.

According to one aspect of the utility model, a cutter is provided, which comprises a cutter body, wherein a plurality of groups of blades which are spirally arranged are arranged on the side surface of the cutter body, and the plurality of groups of blades are arranged in full teeth and unequal distances; the cutter body comprises a detachable cutter body and a cutter head, and the cutter body and the cutter head can be in clearance fit; the matching surface of the cutter body and the cutter head comprises a plurality of sections of curved surfaces.

The beneficial effects of the utility model are that, the cutter body adopts multistage curved surface location with the tool bit, and the angle displacement that produces after the cooperation is less to it is effectual at both cooperation in-process interface dynamic balance. The cutter body can rotate in the forward direction and also can rotate in the reverse direction, and the universality is good. The blades are arranged in full-tooth unequal intervals, the blades on the whole cutter are arranged in a staggered mode relatively and uniformly, the continuity between the blades is good, and the gaps are small. The blade is firm, difficult not hard up, and the cutting is steady, can not produce great impact force machining efficiency height. In addition, the utility model discloses a cutter can design into odd number tooth or even number tooth as required.

In some embodiments, the cutter body and the cutter head are concentrically arranged, and the cutter body and the cutter head are connected through a bolt; the center axes of the cutter body and the cutter head are both provided with bolt through holes. The tool has the advantages that the bolt penetrates through the bolt through holes in the tool body and the tool bit and connects the tool body and the tool bit together, the tool interface is good in hiding performance, the interface is not easily affected by the outside when the tool is used, and the maintenance cost is reduced.

In some embodiments, one end of the cutter body is provided with a torque driving counter bore and a cylindrical counter bore, the torque driving counter bore is arranged in the center of the end face of one end of the cutter body and extends from the end face of the cutter body to the inside of the cutter body, and the cylindrical counter bore is arranged in the center of the bottom end face of the torque driving counter bore and continues to extend from the cylindrical counter bore to the inside of the cutter body; one end of the cutter head is provided with a torque driving boss and a cylindrical boss, the torque driving boss is arranged in the center of the end face of one end of the cutter head and extends from the end face of the cutter head to the outside of the cutter head, and the cylindrical boss is arranged in the center of the end face of the bottom of the torque driving boss and continues to extend from the torque driving boss to the outside of the cutter head; when the cutter body is matched with the cutter head, the cylindrical boss is embedded into the cylindrical counter bore, and the torque driving boss is embedded into the torque driving counter bore. The torque driving counter bore and the cylindrical counter bore are concentrically arranged, the torque driving boss and the cylindrical boss are concentrically arranged, and the interface of the cutter body and the cutter head is centered by adopting double-cylinder guiding, so that the concentricity of the cutter body and the cutter head is ensured. The torque drive boss is connected with the one end of tool bit, and the cylinder boss sets up the one end of keeping away from the tool bit on the torque drive boss, and the side at the cutter body is connected to the blade. So, torque drive boss is closer for the blade on the cylinder boss is kept away from the tool bit, and during the cutting, the cutting force that the blade bore can not pass the cylinder boss through torque drive boss, can avoid the cylinder boss of high accuracy centering to bear the moment of torsion like this, can prevent that the cylinder boss warp, warp.

In some embodiments, the torque driving counter bore and the torque driving boss are projected axially along the bottom to form a closed curve, the closed curve comprises a plurality of concave arc lines and a plurality of convex arc lines, and the concave arc lines are connected with the convex arc lines at intervals; the concave arc line and the convex arc line are both arc or elliptic arcs; the concave arc lines and the convex arc lines are distributed in a circumferential array. The torque driving counter bore and the torque driving boss are matched to form a multi-section curved surface, the corresponding tool interface matching surface is smooth and has no edges and corners, the cutting force borne by the blade during cutting is transmitted stably, and the damage to the tool can be reduced. Compared with a free curve, the circular arc or the elliptical arc is more beneficial to serialization, production and manufacturing and popularization. The plurality of concave arc lines and the plurality of convex arc lines are distributed in an evenly-divided circumferential array, when cutting force borne by the blade is transmitted through the torque driving boss during cutting, the stress at the joint of the cutter head and the cutter body is even, the cutter is prevented from being abraded and deformed, and the dynamic balance of the cutter is ensured.

In some embodiments, the side of the tool body is provided with a plurality of mounting slots arranged spirally; a plurality of blade grooves are formed in the mounting groove, and blades are arranged in the blade grooves. The cutter has the advantages that a fixed point position is provided for the installation of the blade, the appearance of the cutter is optimized, and the cutter is convenient to process.

In some embodiments, the included angle between teeth between any two adjacent mounting grooves is not equal on the same radial section of the cutter body. The cutter has the advantages that included angles between teeth of the blades which are positioned in different mounting grooves on the same radial section of the cutter body are different, the structure with unequal included angles between the teeth can resist interference and effectively reduce cutting vibration, and the specific included angles between the teeth are matched with a full-tooth structure for use.

In some embodiments, in a radial projection of the plurality of inserts in the same mounting slot along the tool body, there is an overlap region between any two adjacent inserts. The cutting tool has the advantages that each row of blades can be guaranteed to effectively cut through a workpiece, the cutting tool is stable in cutting, and the cutting tool can be designed into odd-numbered teeth or even-numbered teeth according to needs.

In some embodiments, a gap exists between two adjacent inserts in different mounting slots along the axial projection of the cutter body, and a partial overlap region exists between two adjacent inserts in different mounting slots along the axial projection of the cutter body. The cutter has the advantages that the continuity between the blades on the whole cutter is good, and the gap is small. Generally, the clearance of the inserts in the multiple mounting grooves along the axial direction of the cutter body is not more than 30 degrees, and the overlapping area is not more than 2 degrees. The cutting tool has the advantages that the blades can be distributed on the circumference relatively and uniformly, and the structure with unequal included angles between the teeth is combined, so that the cutting is smooth, the fluctuation range of the cutting force is small, and the cutting vibration is low.

In some embodiments, the insert pocket includes a locating bottom surface, a radial abutment surface, and an axial abutment surface, the insert being secured to the locating bottom surface; an axial clearance groove, a radial clearance groove and a fillet clearance groove are respectively arranged among the positioning bottom surface, the radial leaning surface and the axial leaning surface. The axial clearance groove is located between the positioning bottom surface and the radial leaning surface, the radial clearance groove is located between the positioning bottom surface and the axial leaning surface, and the fillet clearance groove is located between the radial leaning surface and the axial leaning surface. The positioning device has the advantages that the positioning device adopts a bilateral side-by-side positioning technology, the blade is reliably positioned, the diameter of the tool nose and the end face bounce are small, and the blade is still firmly positioned even under the condition of bearing large cutting force.

In some embodiments, the joint of the cutter head and the cutter body is also provided with a mounting identification line. The tool has the advantages that a positioning reference is provided for the installation of the tool body and the tool bit, and the tool is convenient for operators to install and use.

Drawings

Fig. 1 is a perspective view of a cutter according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the tool shown in FIG. 1 taken along line A-A;

FIG. 3 is a schematic cross-sectional view of the cutting head of the tool shown in FIG. 1 taken along line B-B;

FIG. 4 is a perspective view of the body of the tool shown in FIG. 1;

FIG. 5 is a front view of a cutting head of the tool shown in FIG. 1;

FIG. 6 is a cross-sectional view of the tool tip shown in FIG. 5 taken along line C-C;

FIG. 7 is a schematic diagram of a closed curve according to another embodiment of the present invention;

FIG. 8 is a schematic center sectional view of the body of the tool shown in FIG. 1 engaged with a bolt;

FIG. 9 is a disassembled view of the tool shown in FIG. 1;

FIG. 10 is a front view of the cutter head and cutter body of the cutter shown in FIG. 1;

FIG. 11 is a top view of the body of the tool shown in FIG. 1;

FIG. 12 is an overall top view of the tool shown in FIG. 1;

FIG. 13 is a schematic view of an insert pocket configuration of the tool shown in FIG. 1;

FIG. 14 is a schematic view of a plurality of insert pockets of the tool shown in FIG. 1;

fig. 15 is a schematic view of the mounting of the tool shown in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Fig. 1 to 6 and 8 to 15 schematically show a tool according to an embodiment of the present invention. As shown, the device comprises a tool body comprising a detachable body 1 and a cutting head 2. The side surface of the cutter body is provided with a plurality of blades 5, and the plurality of blades 5 are fixed on the side surface of the cutter head 2 or the cutter body 1 through screws 4. The cutter body 1 and the cutter head 2 are inserted with bolts 3. The cutter body 1 and the cutter head 2 are arranged oppositely, bolt through holes 15 are formed in the central axes of the cutter body 1 and the cutter head 2, and the bolts 3 penetrate through the bolt through holes 15. The top end surface of the cutter head 2 is provided with a screw counter bore 23. The screw counter bore 23 has a diameter larger than that of the bolt through hole 15, and the screw counter bore 23 is disposed concentrically with the bolt through hole 15.

As shown in fig. 2 and 4, the cutter body 1 is provided with a double-counterbore structure, which comprises a torque-driven counterbore 10 and a cylindrical counterbore 14 connected with the torque-driven counterbore. The torque driving counter bore 10 is arranged in the center of the top end face of the cutter body 1, and the torque driving counter bore 10 extends from the top end of the cutter body 1 to the inside of the cutter body 1; the bottom end face center of the torque driving counter bore 10 is provided with a cylindrical counter bore 14, and the cylindrical counter bore 14 extends from the bottom of the torque driving counter bore 10 to the inside of the cutter body 1. The diameter of the torque driver counterbore 10 is larger than the diameter of the cylindrical counterbore 14, the diameter of the cylindrical counterbore 14 is larger than the diameter of the bolt through hole 15, and the bolt through hole 15 passes through the centers of the torque driver counterbore 10 and the cylindrical counterbore 14.

As shown in fig. 2 and 5, the cutting head 2 is provided with a double-boss structure, which includes a torque driving boss 21 and a cylindrical boss 22 connected thereto. One end of the torque driving boss 21 is arranged in the center of the end face at the bottom of the cutter head 2, and the torque driving boss 21 extends from the bottom end of the cutter head 2 to the outside of the cutter head 2; the other end of the torque driving boss 21 extending downwards is connected with a cylindrical boss 22, and the cylindrical boss 22 is arranged in the center of the end face of the bottom of the torque driving boss 21 and extends from the bottom of the torque driving boss 21 to the outside of the cutter head 2. The diameter of the torque driving boss 21 is larger than that of the cylindrical boss 22, the diameter of the cylindrical boss 22 is larger than that of the bolt through hole 15, and the bolt through hole 15 penetrates through the centers of the torque driving boss 21 and the cylindrical boss 22.

The torque driving counter bore 10, the cylindrical counter bore 14, the torque driving boss 21 and the cylindrical boss 22 are arranged concentrically with the bolt through hole 15. When the double-counter bore structure is matched with the double-boss structure, the cylindrical boss 22 is embedded into the cylindrical counter bore 14, the torque driving boss 21 is embedded into the torque driving counter bore 10, and the bolt through hole 15 on the tool bit 2 is mutually connected with the bolt through hole 15 on the tool body 1.

The cylindrical boss 22 and the torque driving boss 21 on the tool bit 2 are respectively placed in the cylindrical counter bore 14 and the torque driving counter bore 10 of the tool body 1, and a clearance fit relation is formed between the double boss structure and the double counter bore structure. The bolt 3 penetrates through the bolt through hole 15 in the cutter head 2 from the top end of the cutter head 2, and the head of the bolt 3 is embedded into the screw counter bore 23 at the top end of the cutter head 2; the tail of the bolt 3 passes through the bolt through hole 15 in the cutter body 1 to connect the cutter head 2 with the cutter body 1, and the cutter body 1 and the cutter head 2 can be fixed on the cutter handle in the prior art, as shown in fig. 15. The head of the bolt 3 is embedded into the screw counter bore 23, so that the safety and stability are realized, and the external influence can be prevented. And the concentricity of the tool bit 2 and the tool body 1 is ensured by adopting double-cylinder guiding centering.

The diameter of the torque driving counter bore 10 is smaller than that of the cutter body 1 and larger than that of the cylindrical counter bore 14, the diameter of the cylindrical counter bore 14 is larger than that of the bolt through hole 15, and the diameter of the cylindrical counter bore 14 is larger than that of the head of the bolt 3. The bolt 3 can pass through the bolt through hole 15 in the cutter body 1, and the head of the bolt 3 is sunk in the cylindrical counter bore 14, as shown in fig. 8, so that the cutter body 1 can still be directly installed for use without the cutter head 2.

As shown in fig. 5, a fitting cylinder 221 is disposed on an end of the cylindrical boss 22 away from the tool bit 2, a guiding cylinder 222 is disposed on an end of the fitting cylinder 221 away from the tool bit 2, and a transition groove 223 is formed between the fitting cylinder 221 and the guiding cylinder 222. The middle of the transition groove 223 is recessed toward the central axis of the cutter head 2, so that a guide angle α is formed between the transition groove 223 and the guide cylinder 222, and the guide angle α is 20 degrees. The guide cylinder 222 is adjacent to the end face of the cylindrical boss 22, and a fillet 224 is further provided between the guide cylinder 222 and the end face of the cylindrical boss 22. The end part of the cylindrical boss 22 is provided with the matching cylinder 221, the transition groove 223 and the guide cylinder 222, and the guide angle alpha is kept not to exceed 20 degrees, so that the installation and the matching of the cutter head 2 and the cutter body 1 can be facilitated, and the connection concentricity of the two is ensured. In addition, the round corner 224 between the guide cylinder 222 and the end face of the cylindrical boss 22 can prevent damage during installation, and prolong the service life.

The mating surfaces of the torque drive boss 21 and the torque drive counterbore 10 are closed multi-section curved surfaces, so that the torque drive boss 21 and the torque drive counterbore 10 are closed curves 11 in an axial projection view from the bottom of the cutter body 1, as shown in fig. 3 and 6. In this embodiment, the closed curve 11 is approximately six-petal quincunx, and the center thereof is substantially coincident with the center of the cutter body 2, so that the balance of the cutter is ensured in design, and the dynamic balance calibration of the cutter is facilitated. The closed curve 11 is formed by multiple sections of circular arcs in a surrounding mode, and the matching surface of the torque driving boss 21 can be directly machined by adopting CNC (computerized numerical control), so that the manufacturing precision is guaranteed, the manufacturing cost is reduced, and the expanded production is facilitated.

As shown in fig. 3 and 6, 5 concave arcs 12 are tangent to an inscribed circle 16 of the closed curve 11, and 6 convex arcs are tangent to an circumscribed circle 17 of the closed curve 11. The multiple arcs forming the closed curve 11 include 6 convex arcs 13 with equal radius and length, 5 concave arcs 12 with equal radius and length, and 1 deformed concave line 120 with larger radius. And, 6 outer convex arc lines 13 are connected with 5 inner

concave arc lines

12 and 1 deformed inner concave line 120 at intervals. And, the radius of 6 evagination camber lines 13 is equal with the radius of indent camber line 12 to, the ring area that forms between inscribed circle 16 and the circumscribed circle 17 of closed curve 11 is little, and the area that torsion drive boss 21 shared is also little, thereby lets out more spaces, convenient processing. The radius of the deformed inner concave line 120 is large, which can facilitate the machining of the tool bit 2.

In other embodiments, the closed curve 11 may be an ellipse as shown in fig. 7(a), a shuttle as shown in fig. 7(b), a triangular prism as shown in fig. 7(c), a quadrangular prism as shown in fig. 7(d), a clover as shown in fig. 7(e), a quincunx as shown in fig. 7(f), a hexalobular quincunx as shown in fig. 7(g), a heptagon as shown in fig. 7(h), an octagon as shown in fig. 7(i), and other shapes. As shown in fig. 7, the closed curve 11 is formed by a plurality of concave arcs 12 and a plurality of convex arcs 13 that are connected at intervals, and the plurality of concave arcs 12 and the plurality of convex arcs 13 are distributed in a circumferential array. And, the closed curve 11 has an inscribed circle 16 and an circumscribed circle 17, wherein the plurality of concave arc lines 12 are tangent to the inscribed circle 16, and the plurality of convex arc lines 13 are tangent to the circumscribed circle 17. Due to the design, the matching surfaces of the torque driving boss 21 and the torque driving counter bore 10 are in a multi-angle symmetrical form, and when a cutter is used for cutting, the matching surfaces of the torque driving boss 21 and the torque driving counter bore 10 are stressed uniformly, so that the cutter can be effectively prevented from being deformed and deflected.

The joint of the cutter head 2 and the cutter body 1 is further provided with an installation mark line 24, as shown in fig. 10, a positioning reference is provided for installation of the cutter head 2 and the cutter body 1, and installation and use of an operator are facilitated.

The cylindrical boss 22 of the cutter head 2 is formed by turning, the profile of the torque driving boss 21 is formed by milling by using a power tool, and the double-boss structure of the whole cutter head 2 part can be completed by clamping on a lathe with the power tool at one time, so that the double-boss structure can be completed without increasing equipment and processes. The cylindrical counter bore 14 of the cutter body 1 is formed by turning, the profile of the torque driving counter bore 10 is formed by milling, the equipment can be completed at one time by using a turning center, and the equipment can also be configured by using a lathe and a milling center according to actual conditions. This can be done without adding equipment and processes.

In the embodiment, the measuring method of the tool interface is simple, and the torque driving boss 21 of the tool bit 2 can be detected by using a coordinate measuring machine, an image measuring instrument, an external micrometer, a smooth limit gauge and the like. The torque-driven counterbore 10 of the cutter body 1 can be detected using a coordinate measuring machine, an image measuring instrument, an inside micrometer, a smooth limit gauge, or the like. The detection aspect may select the configuration based on existing conditions.

In this embodiment, the cutter is a full-tooth non-equidistant structure, and as shown in fig. 9, 5 mounting grooves are spirally arranged on the side surface of the cutter body 1, namely, a first mounting groove 61, a second mounting groove 62, a third mounting groove 63, a fourth mounting groove 64 and a fifth mounting groove 65. Equally be equipped with 5 mounting grooves on the side of tool bit 2, be the first mounting groove of tool bit 61 ', tool bit second mounting groove 62', tool bit third mounting groove 63 ', tool bit fourth mounting groove 64', tool bit fifth mounting groove 65 'respectively, and when cutter body 1 and tool bit 2 were mutually supported along installation sign line 24, the first mounting groove of tool bit 61' cooperateed with first mounting groove 61 and is connected, tool bit second mounting groove 62 'cooperatees with second mounting groove 62 and is connected, tool bit third mounting groove 63' cooperatees with third mounting groove 63 and is connected, tool bit fourth mounting groove 64 'cooperatees with fourth mounting groove 64 and is connected, tool bit fifth mounting groove 65' cooperatees with fifth mounting groove 65 and is connected.

On the same radial section of the cutter body, the included angles between the teeth between any two adjacent mounting grooves are unequal, and the included angles between the teeth of the blades 5 mounted in different mounting grooves are unequal. Each tooth is staggered by an angle in the axial direction, and the blades 5 on the whole cutter are relatively uniformly staggered and arranged when viewed from the bottom of the cutter body along the axial direction, so that the continuity between the blades 5 is good, the gap is small, the cutting process is smooth, and large impact force cannot be generated.

In the radial projection of a plurality of blades 5 in the same mounting groove along the cutter body, any two adjacent blades 5 have an overlapping area. When the blade 5 cuts through a workpiece, in the cutting process, one blade 5 is always quickly supplemented after leaving the workpiece, and the overlapped area between the adjacent blades 5 can ensure stable cutting and improve the processing efficiency. In addition, the blade 5 can be designed into odd teeth or even teeth to adapt to various application scenes.

The same mounting groove on cutter body 1 evenly distributed has 8 blade grooves, installs a blade 5 in the blade groove respectively. As shown in fig. 10 and 15, taking the first mounting groove 61 as an example, 8 insert pockets in the first mounting groove 61 are a first insert pocket 71, a second insert pocket 72, a third insert pocket 73, a fourth insert pocket 74, a fifth insert pocket 75, a sixth insert pocket 76, a seventh insert pocket 77 and an eighth insert pocket 78 from the bottom of the cutter body 1 along the axial direction of the cutter body 1, the corresponding 8 inserts 5 are a first insert 51, a second insert 52, a third insert 53, a fourth insert 54, a fifth insert 55, a sixth insert 56, a seventh insert 57 and an eighth insert 58 from the bottom of the cutter body 1, and an overlapping region exists between two adjacent inserts 5 in the same mounting groove, as shown in fig. 2, 8 and 10, so that the gap between the inserts 5 can be reduced and the cutting effect can be ensured.

As can be seen from fig. 11, the first blade 51, the second blade 52 and the third blade 53 in the first mounting groove 61 are located in the same inter-tooth corner region, and the fourth blade 54, the fifth blade 55, the sixth blade 56, the seventh blade 57 and the eighth blade 58 are located in another adjacent inter-tooth corner region. The sixth blade 56 in the first mounting groove 61 is located between the first blade 51 and the second blade 52 in the second mounting groove 62, the seventh blade 57 in the first mounting groove 61 is located between the second blade 52 and the third blade 53 in the second mounting groove 62, and the eighth blade 58 in the first mounting groove 61 is also located between the third blade 53 and the fourth blade 54 in the second mounting groove 62. The blades 5 in the remaining mounting slots are distributed in the order of the blades 5 in the first mounting slot 61. The sixth blade 56 of the fifth mounting groove 65 is located between the first blade 51 and the second blade 52 in the first mounting groove 61, the seventh blade 57 of the fifth mounting groove 65 is located between the second blade 52 and the third blade 53 in the first mounting groove 61, and the eighth blade 58 of the fifth mounting groove 65 is also located between the third blade 53 and the fourth blade 54 in the first mounting groove 61.

As seen from the axial projection of the cutter body 1, as shown in fig. 11, a gap exists between two adjacent blades 5 along the axial projection of the cutter body 1 in different mounting grooves, a partial overlapping region exists between two adjacent blades 5 along the axial projection of the cutter body 1 in different mounting grooves, a gap exists between two adjacent blades 5 along the axial projection of the cutter body 1 in different mounting grooves is 30 degrees, and an overlapping region exists between two adjacent blades 5 along the axial projection of the cutter body 1 in different mounting grooves is 2 degrees.

The distribution of the insert pockets and the inserts 5 on the side surfaces of the cutter head 2 is the same as the arrangement of the insert pockets and the inserts 5 on the cutter body 1.

In the 5 mounting grooves of the cutting

head

2, 4 insert grooves are respectively provided, and taking the first mounting groove 61 'as an example, from one end of the first mounting groove 61' close to the cylindrical boss 22, along the axial direction of the cutting head 2, a ninth insert groove 79, a tenth insert groove 710, an eleventh insert groove 711 and a twelfth insert groove 712 are respectively provided. The inserts 5 mounted in the ninth insert pocket 79, the tenth insert pocket 710, the eleventh insert pocket 711, and the twelfth insert pocket 712 are a ninth insert 59, a tenth insert 510, an eleventh insert 511, and a twelfth insert 512, respectively.

When the cutter body 1 and the cutter head 2 are matched with each other along the installation indication line 24, as viewed in an axial projection view of the cutter body 1 and the cutter head 2, the ninth blade 59 in the first installation groove 61 'is located between the fourth blade 54 and the fifth blade 55 in the second installation groove 62, the tenth blade 510 in the first installation groove 61' is located between the fifth blade 55 and the sixth blade 56 in the second installation groove 62, the eleventh blade 511 in the first installation groove 61 'is located between the sixth blade 56 and the seventh blade 57 in the second installation groove 62, and the twelfth blade 512 in the first installation groove 61' is located between the seventh blade 57 and the eighth blade 58 in the second installation groove 62, as shown in fig. 12.

The blades 5 on the side surfaces of the cutter body 1 and the cutter head 2 are relatively uniformly distributed on the circumference of the side surface of the cutter body, so that the continuity between the plurality of blades 5 arranged on the side surface of the cutter is ensured. In the cutting process, after one blade 5 leaves the workpiece, the other blade 5 is quickly supplemented, the cutting process is smooth, the fluctuation range of the cutting force is small, and large impact force cannot be generated.

As shown in fig. 13 and 14, the insert pocket includes a positioning bottom surface 81, a radial abutment surface 82, and an axial abutment surface 83, the positioning bottom surface 81 is provided with a threaded hole 87, the threaded hole 87 is capable of being engaged with the screw 4, and the insert 5 is fixed to the positioning bottom surface 81 by the screw 4. An axial clearance groove 86, a radial clearance groove 85, and a fillet clearance groove 84 are provided between the positioning bottom surface 81, the radial abutment surface 82, and the axial abutment surface 83, respectively. The axial clearance groove 86 is located between the positioning bottom surface 81 and the radial abutment surface 82, the radial clearance groove 85 is located between the positioning bottom surface 81 and the axial abutment surface 83, and the fillet clearance groove 84 is located between the radial abutment surface 82 and the axial abutment surface 83. By adopting the double-side leaning surface positioning technology, each blade 5 is provided with one positioning bottom surface 81 and two leaning surfaces, the positioning of the blade 5 is reliable, the mounting precision is high, the processing precision of a workpiece can be improved, and the service life of a cutter can be prolonged.

The axial abutment surfaces 83 of the first insert pockets 71 in the plurality of mounting pockets on the cutter body 1 are close to the main shaft side of the cutter body, and the axial abutment surfaces 83 of the remaining 7 insert pockets are gradually distant from the main shaft side of the cutter body from the second insert pocket 72. Therefore, the orientation of the plurality of blades 5 in the same mounting groove is gradually changed, so that smooth cutting can be ensured, and cutting vibration is reduced.

Example 2

The cutter in the present embodiment is different from embodiment 1 in the following points:

the closed curve 11 obtained by projecting the torque driving boss 21 and the torque driving counter bore 10 from the bottom axis of the cutter body 1 is in a standard six-petal quincunx shape, as shown in fig. 7(f), the multiple sections of circular arcs forming the closed curve 11 comprise 6 convex arc lines 13 with equal radius and length, and 6 concave arc lines 12 with equal length, and the radius of the 6 convex arc lines 13 is smaller than that of the 6 concave arc lines 12.

The guide angle α between the transition groove 223 and the guide cylinder 222 on the tool bit 2 is 18 degrees.

Viewed from the axial projection of the cutter body 1, the gap between two adjacent blades 5 along the axial projection of the cutter body 1 in different mounting grooves is 18 degrees, and the overlapping area between two adjacent blades 5 along the axial projection of the cutter body 1 in different mounting grooves is 1 degree.

Example 3

The difference between the cutting tool in this embodiment and embodiment 1 is that, when viewed from the axial projection of the tool body 1, the gap between two adjacent blades 5 along the axial projection of the tool body 1 in different mounting grooves is 16 degrees, and the overlap region between two adjacent blades 5 along the axial projection of the tool body 1 in different mounting grooves is 0.2 degree, so that the fluctuation range of the cutting force is further reduced, the cutting vibration is reduced, and the smooth and smooth cutting is ensured.

Example 4

The difference between the cutting tool in this embodiment and embodiment 1 is that, when viewed from the axial projection of the tool body 1, the gap between two adjacent blades 5 in different mounting grooves along the axial projection of the tool body 1 is 12 degrees, and there is no overlapping area between two adjacent blades 5 in different mounting grooves along the axial projection of the tool body 1, thereby further reducing the fluctuation range of the cutting force, reducing the cutting vibration, and ensuring smooth and smooth cutting.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. A cutter comprises a cutter body and is characterized in that,

a plurality of groups of spirally arranged blades (5) are arranged on the side surface of the cutter body, and the plurality of groups of blades (5) are arranged in a full-tooth non-equidistant manner;

the cutter body comprises a detachable cutter body (1) and a cutter head (2), and the cutter body (1) and the cutter head (2) can be in clearance fit; the matching surface of the cutter body (1) and the cutter head (2) comprises a plurality of sections of curved surfaces.

2. Tool according to claim 1, characterized in that the body (1) is arranged concentrically with the cutting head (2) and that the body (1) is connected with the cutting head (2) by means of bolts (3); the cutter body (1) and the cutter head (2) are both provided with bolt through holes (15) on the central axis.

3. The cutting tool according to claim 2, characterized in that one end of the tool body (1) is provided with a torque driving counter bore (10) and a cylindrical counter bore (14), the torque driving counter bore (10) is arranged at the center of the end face of one end of the tool body (1) and extends from the end face of the tool body (1) to the inside of the tool body (1), the cylindrical counter bore (14) is arranged at the center of the bottom end face of the torque driving counter bore (10) and extends from the torque driving counter bore (10) to the inside of the tool body (1);

one end of the tool bit (2) is provided with a torque driving boss (21) and a cylindrical boss (22), the torque driving boss (21) is arranged in the center of the end face of one end of the tool bit (2) and extends from the end face of the tool bit (2) to the outside of the tool bit (2), and the cylindrical boss (22) is arranged in the center of the end face of the bottom of the torque driving boss (21) and extends from the torque driving boss (21) to the outside of the tool bit (2);

when the cutter body (1) is matched with the cutter head (2), the cylindrical boss (22) is embedded into the cylindrical counter bore (14), and the torque driving boss (21) is embedded into the torque driving counter bore (10).

4. The tool according to claim 3, wherein the torque driving counter bore (10) and the torque driving boss (21) are axially projected along the bottom to form a closed curve (11), the closed curve (11) comprises a plurality of concave arcs (12) and a plurality of convex arcs (13), and the concave arcs (12) are connected with the convex arcs (13) at intervals; the concave arc line (12) and the convex arc line (13) are both circular arcs or elliptical arcs; the concave arc lines (12) and the convex arc lines (13) are distributed in a circumferential array.

5. The tool according to claim 1, wherein the side of the tool body is provided with a plurality of mounting grooves arranged spirally; a plurality of blade grooves are formed in the mounting groove, and blades (5) are arranged in the blade grooves.

6. The tool according to claim 5, wherein the included angles between teeth between any two adjacent mounting grooves are not equal on the same radial section of the tool body.

7. Tool according to claim 6, characterized in, that in the radial projection of the tool body of a plurality of inserts (5) in the same mounting groove, there is an overlapping area of any two adjacent inserts (5).

8. Tool according to claim 7, characterized in, that there is a gap between two inserts (5) in different mounting slots adjacent in axial projection of the tool body, and that there is a partial overlap area between two inserts (5) in different mounting slots adjacent in axial projection of the tool body.

9. Tool according to claim 5, characterized in that the insert pocket comprises a positioning bottom surface (81), a radial rest surface (82) and an axial rest surface (83), the insert (5) being fixed to the positioning bottom surface (81); an axial clearance groove (86), a radial clearance groove (85) and a fillet clearance groove (84) are respectively arranged among the positioning bottom surface (81), the radial leaning surface (82) and the axial leaning surface (83).

10. The cutting tool according to any one of claims 1-9, wherein the joint of the cutting head (2) and the tool body (1) is further provided with a mounting mark line (24).