CN212169119U - Cutter with novel interface - Google Patents

Abstract

The utility model discloses a cutter with a novel interface, which comprises a cutter body and a cutter head which are connected through a bolt, wherein the cutter head is connected with a blade; the cutter body is in clearance fit with the cutter head through a double-cylinder interface; the double-cylinder interface comprises a double-counter bore structure positioned at one end of the cutter body and a double-boss structure positioned at one end of the cutter head; the matching surfaces of the double-counter-bore structure and the double-boss structure are all multi-section curved surfaces. The utility model discloses use the centering of two cylinder direction, guaranteed cutter body and tool bit concentricity between them. The interface transmits torque through the multi-section curved surface, so that the torque range which can be borne by the interface can be greatly increased, and the dynamic balance effect is good. By adopting the double-cylinder interface, the cutter can rotate forwards or backwards, and the application range is wider. Additionally, the utility model discloses a cutter interface hiding nature is good, and the interface is difficult to receive external influence when using, has reduced the maintenance cost.

Description

Cutter with novel interface

Technical Field

The utility model relates to a cutter field, in particular to cutter with novel interface.

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 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. 2. 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. 3. 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. 4. 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 blades are distributed on the circumference, and some places are too concentrated, and some places have too large gaps, so that sudden stress and sudden complete dissipation force during cutting can be caused, and cutting vibration is easy to generate. 6. 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.

Chinese utility model patent with publication number CN208945257U discloses an elongation corn milling cutter, which uses a cylindrical centering, and has the following disadvantages: 1. the tool is locked only by cylindrical centering and a gasket after installation, the torque between the tool bit and the tool body only depends on the friction force after the screw is pressed, the torque which can be borne by the tool is worse, and heavy cutting cannot be carried out. 2. Only the cylinder is centered, a torque driving device is not arranged, the positioning on the circumference cannot be realized, the angle position of the cutter head and the cutter body on the circumference cannot be controlled during installation, and the cutting control expected by design cannot be achieved.

In summary, the interface design of the long-edge square shoulder milling cutter on the market at present has various serious defects.

SUMMERY OF THE UTILITY MODEL

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

According to one aspect of the utility model, the cutter with the novel interface is provided, which comprises a cutter body and a cutter head which are oppositely arranged, wherein the cutter body is connected with the cutter head through a bolt; the bolt through holes are formed in the center axes of the cutter body and the cutter head, and the side surfaces of the cutter head and the cutter body are connected with blades; the cutter body is matched with the cutter head through a double-cylinder interface; the double-cylinder interface comprises a double-counter bore structure positioned at one end of the cutter body and a double-boss structure positioned at one end of the cutter head, the double-counter bore structure and the double-boss structure are arranged oppositely, and the double-counter bore structure can be in clearance fit with the double-boss structure; the matching surfaces of the double-counter-bore structure and the double-boss structure comprise a plurality of sections of curved surfaces.

The beneficial effects of the utility model are that, cutter body and tool bit pass through bolted connection, safety and stability. A double-cylinder interface is adopted between the cutter body and the cutter head, and double-cylinder guiding centering is adopted, so that the concentricity of the cutter body and the cutter head is ensured. The double counter bore structure and the double boss structure form a clearance fit relation when being connected in the interface, and the matching surfaces of the double counter bore structure and the double boss structure are all multi-section curved surfaces, so that the torque range borne by the interface can be greatly increased by transferring torque through the multi-section curved surfaces. In addition, the multi-section curved surface positioning is adopted, the angular displacement generated after the tool bit and the tool body are matched is smaller, the dynamic balance effect of the interface is good in the matching process of the tool bit and the tool body, and the later dynamic balance calibration of the cutting tool can be greatly simplified. By adopting the double-cylinder interface, the cutter can rotate forwards or backwards, and the application range is wider. Additionally, the utility model discloses a cutter interface hiding nature is good, and the interface is difficult to receive influences such as external cutting, dust, greasy dirt when using, can not cause the wind and cry, has reduced the maintenance cost.

In some embodiments, the double-counterbore structure comprises a torque-driven counterbore and a cylindrical counterbore, the torque-driven counterbore is arranged in the center of the top end face of the cutter body, and the cylindrical counterbore is arranged in the center of the bottom end face of the torque-driven counterbore; the double-boss structure comprises a torque driving boss and a cylindrical boss, the torque driving boss is arranged in the center of the bottom end face of the cutter head, and the cylindrical boss is arranged in the center of the bottom end face of the torque driving boss; when the double-counter bore structure is matched with the double-boss structure, 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 is concentric with the cylindrical counter bore, and the torque driving boss is concentric with the cylindrical boss, so that the torque driving counter bore is matched with the torque driving boss, the cylindrical counter bore is matched with the cylindrical boss, and the double-cylinder guiding centering ensures the concentricity of the cutter body and the cutter head. And the torque driving boss is connected with the bottom of the cutter head, the cylindrical boss is arranged at one end, far away from the cutter head, of the torque driving boss, and the blade is connected to the side face of the cutter head. 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 to 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 diameter of the torque drive boss is greater than the diameter of the cylindrical boss, which is greater than the diameter of the bolt through hole; the diameter of the torque driving counter bore is larger than that of the cylindrical counter bore, and the diameter of the cylindrical counter bore is larger than that of the bolt through hole. The bolt passes through the bolt through hole and fixes the cutter body and the cutter head, the cutter interface forms a double-cylinder matched structure at the periphery of the bolt through hole, the diameter of the inner-layer cylinder is smaller than that of the outer-layer cylinder, the cutter head and the cutter body can be of an integrally formed structure, the cutter head and the cutter body can be directly inserted and matched during installation, other parts or structure matching is not needed, the installation is convenient, and the structure is simplified.

In some embodiments, the torque driving counter bore and the torque driving boss are projected along the bottom axial direction to form a closed curve, the closed curve comprises a plurality of concave arc lines and a plurality of convex arc lines, the concave arc lines are connected with the convex arc lines at intervals, and the concave arc lines and the convex arc lines are circular arcs or elliptical arcs. The cutter has the beneficial effects that the center of the closed curve is basically superposed with the center of the cutter body or the cutter head, so that the dynamic balance of the cutter is ensured. Many indent arcs and many evagination arcs enclose into closed curve, and the two cylinder interface fitting surface that correspond is mellow and full not have edges and corners, and the conveying of the cutting force that the blade bore during cutting is steady, can reduce the damage to the cutter. Compared with a free curve, the circular arc or the elliptical arc is more beneficial to serialization, production and manufacturing and popularization. Furthermore, the plurality of concave arc lines and the plurality of convex arc lines are circular arcs. The arc has the advantages that the manufacturing cost of the arc is lower than that of the elliptic arc; CNC can directly use the G code to walk the circular arc, and the elliptic arc is approximated by a plurality of straight lines or circular arcs, and the precision of the circular arc curve is higher than that of the elliptic arc when the manufacturing cost is the same, so that the circular arc can ensure high efficiency, high precision and low cost.

In some embodiments, the plurality of concave arcs and the plurality of convex arcs are distributed in an equally-divided circumferential array. The torque-driven cutter has the advantages that when cutting force borne by the blade is transmitted through the torque-driven boss during cutting, the stress on the joint of the cutter head and the cutter body is uniform, the cutter is prevented from being abraded and deformed, and the dynamic balance of the cutter is guaranteed.

The matching surfaces of the torque driving counter bore and the torque driving boss are all multi-section curved surfaces, so that the torque driving counter bore and the torque driving boss can form a closed curve along the axial projection of the bottom. The closed curve is formed by a plurality of sections of circular arcs or a plurality of sections of elliptical arcs, so the shape of the closed curve can be an ellipse, a fisheye shape, a triangular prism, a quadrangular prism, a clover shape, a quincuncial shape, a hexapetalous shape, a heptagon shape, an octagon shape and the like. Compared with a clover shape and a quincunx shape, the six-petal quincunx shape is smaller in matched driving angle, smaller in angular displacement generated between the cutter head and the cutter body, and smaller in matched clearance than the clover shape is matched with the six-petal quincunx shape and smaller in hexagonal matched with the triangular matched with the six-petal quincunx shape; compared with a heptagon and an octagon, the six-petal quincunx has larger curve radius and higher strength, and is more beneficial to production and manufacture. Moreover, the six-petal quincunx can be simultaneously applied to the occasions of positive rotation and negative rotation.

In some embodiments, the closed curve has an inscribed circle and an circumscribed circle, the concave arc is tangent to the inscribed circle, and the convex arc is tangent to the circumscribed circle. The cutter has the beneficial effects that the center of the closed curve is basically superposed with the center of the cutter body or the cutter head, so that the dynamic balance of the cutter is ensured. The multistage curved surface of moment of torsion drive boss is tangent with inscribed circle and circumcision, and when the cutting force that the blade bore during the cutting passed through moment of torsion drive boss transmission, each point atress on the fitting surface of moment of torsion drive boss was even, can guarantee the dynamic balance of cutter, prevented that the cutter warp, the inflection.

In some embodiments, the radius of the convex arc is less than or equal to the radius of the concave arc. The torque driving device has the advantages that the circular ring area formed by the inscribed circle and the circumscribed circle of the closed curve is small, so that the occupied area of the torque driving boss and the torque driving counter bore of the cutter interface is small, more space can be reserved, and the processing is convenient. When the radius of evagination pitch arc equals with the radius of indent pitch arc, reduce the requirement to processing equipment, can improve production efficiency to the cross-sectional size that moment of torsion drive counter bore and moment of torsion drive boss participated in the atress is the same in the use, can not damage the opposite side in advance in order to guarantee that one side is firm.

In some embodiments, the closed curve further comprises one or two deformed concave lines, the deformed concave lines have a different shape or size than the concave arc line, and the deformed concave lines and the concave arc line are distributed in a circumferential array; in some embodiments, the closed curve further includes one or two deformed convex lines, the deformed convex lines have a different shape or size than the convex arc lines, and the deformed convex lines and the convex arc lines are distributed in a circumferential array. The tool has the advantages that a unique or unique mounting angle can be formed in the equal-fraction direction, and the tool body and the tool bit are guaranteed to be matched at the correct position.

In some embodiments, the closed curve further comprises one or two deformed concave lines, the radius of the deformed concave line is greater than the radius of the concave arc line, and the deformed concave lines and the concave arc line are distributed in a circumferential array. The tool has the advantages that one or two deformed inner concave lines with the radius larger than that of the inner concave arc line exist in the closed curve, so that the tool with the larger diameter can be used for machining, and the machining difficulty of the tool bit is reduced; the radius that will be in the indent camber line that radius and length equal originally or two grow, and the closed curve can not surpass the scope between inscribed circle and the circumscribed circle, can not influence the processing of moment of torsion drive boss in the tool bit course of working.

In some embodiments, a matching cylinder is arranged at one end of the cylinder boss far away from the cutter head, a guide cylinder is arranged at one end of the matching cylinder far away from the cutter head, and the guide cylinder is close to the end face of the cylinder boss; a transition groove is further arranged between the matching cylinder and the guide cylinder, a guide angle alpha is formed between the transition groove and the matching cylinder, and the guide angle alpha is not more than 20 degrees. The tool bit has the advantages that the tool bit is convenient to install and match with the tool body, and the concentricity of the tool bit and the tool body is better guaranteed. In addition, a fillet can be arranged between the end faces of the guide cylinder and the cylindrical boss, so that the installation is further facilitated.

In some embodiments, the top end surface of the cutter head is provided with a screw counter bore, and the diameter of the screw counter bore is larger than that of the bolt through hole; the head of the bolt can be fitted in the screw counterbore. The tool bit has the advantages that the screw counter bore is formed in the top of the tool bit and can be used for fixing a bolt, and the tool bit and the tool body are connected and fastened.

Drawings

Fig. 1 is a perspective view of a tool with a novel interface according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the tool with the novel interface of FIG. 1 taken along line A-A;

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

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

FIG. 5 is a front view of the cutting head of the tool with the new interface 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 disassembled view of the tool with the novel interface 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 7 schematically show a tool with a novel interface according to an embodiment of the present invention. As shown, the device comprises a cutter body 1, a cutter head 2, a bolt 3, a plurality of blades 5 and a plurality of screws 4. Wherein a plurality of inserts 5 are fixed to the side of the cutter head 2 or the cutter body 1 by screws 4. The cutter body 1 and the cutter head 2 are arranged oppositely, and bolt through holes 15 are formed in the central axes of the cutter body 1 and the cutter head 2. 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 end face of one end of the cutter body 1, and the torque driving counter bore 10 extends from the end face 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 torque driving counter bore 10 to the interior 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 of one end of the cutter head 2, and the torque driving boss 21 extends from the end face 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 at the center of the bottom end face of the torque driving boss 21 and extends from 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.

As shown in fig. 4 and 8, the cylindrical boss 22 and the torque driving boss 21 on the tool bit 2 are respectively placed in the cylindrical counterbore 14 and the torque driving counterbore 10 of the tool body 1, and a clearance fit relationship is formed between the double boss structure and the double counterbore 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 part of the bolt 3 penetrates through a 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. 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.

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 rounded corner 224 between the guide cylinder 222 and the end surface of the cylindrical boss 22 prevents damage during installation.

The matching surfaces of the torque driving boss 21 and the torque driving counterbore 10 are closed multi-section curved surfaces, and the projection diagram of the torque driving boss 21 and the torque driving counterbore 10 from the bottom of the cutter body 1 in the axial direction is a closed curve 11, 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 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.

Example 2

The cutter with the novel interface in the embodiment is different from the cutter with the novel interface in the embodiment 1 in the following points:

the closed curve 11 resulting from the axial projection of the torque driver boss 21 and the torque driver counterbore 10 from the bottom of the cutter body 1 is a six-lobed quincunx, as shown in fig. 7 (f). The circular arcs forming the closed curve 11 include 6 convex arcs 13 with equal radius and length, and 6 concave arcs 12 with equal length. The 6 concave arc lines 12 are tangent to the inscribed circle 16, and the 6 convex arc lines 13 are tangent to the circumscribed circle 17. 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. In addition, the radius of the 6 convex arc lines 13 is smaller than that of the 6 concave arc lines 12, the circular ring area formed between the inscribed circle 16 and the circumscribed circle 17 of the closed curve 11 is larger, so that the area occupied by the torque driving boss 21 is larger, and the structure is more stable.

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

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 (10)

1. The cutter with the novel interface is characterized by comprising a cutter body (1) and a cutter head (2) which are oppositely arranged, wherein the cutter body (1) is connected with the cutter head (2) through a bolt (3); the center axis of the cutter body (1) and the cutter head (2) is provided with a bolt through hole (15), and the side surfaces of the cutter head (2) and the cutter body (1) are connected with a blade (5);

the cutter body (1) is matched with the cutter head (2) through a double-cylinder interface; the double-cylinder interface comprises a double-counter bore structure and a double-boss structure which are oppositely arranged; the double-counter bore structure is positioned at one end of the cutter body (1), and the double-boss structure is positioned at one end of the cutter head (2); and the double counter bore structure can be in clearance fit with the double boss structure;

the matching surfaces of the double-counter bore structure and the double-boss structure comprise a plurality of sections of curved surfaces.

2. The tool with the novel interface of claim 1,

the double-counter bore structure comprises a torque driving counter bore (10) and a cylindrical counter bore (14), the torque driving counter bore (10) is arranged in the center of the top end face of the cutter body (1), and the cylindrical counter bore (14) is arranged in the center of the bottom end face of the torque driving counter bore (10);

the double-boss structure comprises a torque driving boss (21) and a cylindrical boss (22), the torque driving boss (21) is arranged in the center of the bottom end face of the cutter head (2), and the cylindrical boss (22) is arranged in the center of the bottom end face of the torque driving boss (21);

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), and the torque driving boss (21) is embedded into the torque driving counter bore (10).

3. The tool with the novel interface according to claim 2, characterized in that the diameter of the torque driving boss (21) is larger than the diameter of the cylindrical boss (22), the diameter of the cylindrical boss (22) is larger than the diameter of the bolt through hole (15); the diameter of the torque driving counter bore (10) is larger than that of the cylindrical counter bore (14), and the diameter of the cylindrical counter bore (14) is larger than that of the bolt through hole (15).

4. The tool with the novel interface 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 arc lines (12) and a plurality of convex arc lines (13), and the concave arc lines (12) are connected with the convex arc lines (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. Tool with novel interface according to claim 4, characterized by the fact that the closed curve (11) presents an inscribed circle (16) and an circumscribed circle (17), the concave arc (12) being tangent to the inscribed circle (16), the convex arc (13) being tangent to the circumscribed circle (17).

6. Tool with a novel interface according to claim 5, characterized in, that the radius of the outer convex arc (13) is smaller or equal to the radius of the inner concave arc (12).

7. The tool with the novel interface according to claim 5, wherein the closed curve (11) further comprises one or two deformed concave lines (120), the deformed concave lines (120) have a shape or size different from the concave arc line (12), and the deformed concave lines (120) are distributed in a circumferential array with the concave arc line (12); or the closed curve (11) further comprises one or two deformed convex lines, and the shape or the size of the deformed convex lines is different from that of the convex arc lines (13); and the deformed convex lines and the convex arc lines (13) are distributed in a circumferential array.

8. Tool with novel interface according to claim 7, characterized by the fact that the closed curve (11) further comprises one or two deformed concave lines (120), the radius of the deformed concave lines (120) being larger than the radius of the concave arc (12).

9. The cutting tool with the novel interface according to claim 3, wherein a matching cylinder (221) is arranged at one end of the cylinder boss (22) far away from the cutting head (2), and a guiding cylinder (222) is arranged at one end of the matching cylinder (221) far away from the cutting head (2); a transition groove (223) is further arranged between the matching cylinder (221) and the guide cylinder (222), a guide angle alpha is formed between the transition groove (223) and the matching cylinder (221), and the guide angle alpha is not more than 20 degrees.

10. The cutter with the novel interface as claimed in any one of claims 1-9, characterized in that the top end face of the cutter head (2) is provided with a screw counter bore (23), and the diameter of the screw counter bore (23) is larger than that of the bolt through hole (15); the head of the bolt (3) can be embedded in the screw counter bore (23).

Images