CN116060678A - A Modular Cutting Tool with Multiple Radial Clamping - Google Patents

Abstract

The invention discloses a modular cutting tool with multiple radial clamping, comprising a clamping part and a cutting part installed on the clamping part, the clamping part comprises a clamping handle and a clamping head , the cutting part includes a cutting head and a cutting tail, the cutting tail is provided with a clamping protrusion, the clamping end surface of the clamping head is provided with a clamping recess, and the clamping protrusion includes sequentially A cylindrical platform, an external thread and a conical platform are set, and the clamping recess includes a cylindrical recess, an internal thread and a conical recess arranged in sequence, and the cylindrical platform and the conical platform are respectively connected with the column Shaped recesses and tapered recesses correspond to contact, and the external thread cooperates with the internal thread. The present invention has the advantages of good connection strength and rigidity, high cutting efficiency, long service life and stable cutting.

Description

A Modular Cutting Tool with Multiple Radial Clamping

technical field

The invention mainly relates to the field of metal cutting, in particular to a modular cutting tool with multiple radial clamping.

Background technique

Only the cutting part of the cutting tool participates in cutting during the machining process, and the clamping handle does not participate in cutting. In order to avoid the damage of the cutting part and cause the entire cutting tool to be scrapped, so as to prolong the service life of the cutting tool, in the prior art, the cutting tool is usually The cutting part and the clamping shank are set independently, and the cutting part and the clamping shank are connected by ordinary threads to realize repeated loading and unloading of the cutting part on the clamping shank.

However, with the rapid development of the manufacturing industry, the length-to-diameter ratio of cutting tools is increasing, so higher strength and rigidity requirements are put forward for the cutting tools. The cutting tool can be made of cemented carbide or a material close to the performance of cemented carbide. At the same time, in order to make the cutting part quickly disassembled on the clamping part, thread fit is generally used to realize the connection of the cutting part and the clamping part. The end of the clamping part is provided with a cylindrical surface, and the end surface is in contact with the cutting part respectively, so as to limit the center and end face of the cutting part and ensure the axial and radial positioning accuracy and positioning strength of the cutting part. Although this connection method can realize high-strength fast loading and unloading of cutting parts and simple structure, this type of cutting tool has poor radial rigidity and strength. When cutting with large radial loads such as side milling, the cutting vibration generated by the cutter head Large, affecting the machining accuracy and reducing the service life of cutting tools.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a modular cutting tool with multiple radial clamping, which has good connection strength and rigidity, high cutting efficiency, long service life and stable cutting.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

A modular cutting tool with multiple radial clamps, comprising a clamping component and a cutting component mounted on the clamping component, the clamping component comprising a clamping shank and a clamping head, the cutting The part includes a cutting head and a cutting tail, the cutting tail is provided with a clamping protrusion, the clamping end surface of the clamping head is provided with a clamping recess, and the clamping protrusions include successively arranged cylindrical platform, external thread and conical platform, and the clamping recess includes cylindrical recess, internal thread and conical recess arranged in sequence, and the cylindrical platform and conical platform are respectively connected with the cylindrical recess, The conical recess is in corresponding contact, and the external thread cooperates with the internal thread.

As a further improvement of the above technical solution:

The cylindrical platform, external thread and conical platform are arranged in sequence along the direction away from the cutting head, and the conical recesses, internal threads and cylindrical recess are arranged in sequence along the direction away from the clamping shank .

Both the clamping protrusion and the clamping recess are symmetrical about the rotation center axis of the modular cutting tool.

The cone angle of the conical truss is θ2, and the cone angle of the conical recess is θ1, which should satisfy: 1°≤θ1≤3°, 1°≤θ2≤3°, 10'≤θ2-θ1≤45 '.

The diameter of the cylindrical recess is D, and the diameter of the cylindrical platform is d, which should satisfy: -0.02mm≤D-d≤0.02mm.

A stepped surface is provided between the cutting head and the cutting tail, and the clamping end surface of the clamping head interferes with the stepped surface.

The tapered recess is set on the inner bottom surface of the internal thread, the diameter of the intersection circle between the tapered recess and the inner bottom surface is D1, and the tapered platform is arranged on the outer end surface of the external thread, so The diameter of the intersecting circle between the conical pedestal and the outer end surface is d1, which should satisfy: 0≤d1-D1≤0.02mm.

The root of the conical table is provided with a boss cylindrical surface, the diameter of the boss cylindrical surface is d2, which should satisfy: 0.2mm≤d1-d2≤0.8mm.

The outer diameter of the external thread is d3, and the lead P of the external thread should satisfy: 0.3d3≤P≤0.8d3.

The beginning of the internal thread is provided with an inner transition surface between the inner crest and the inner tooth bottom, the inner transition surface includes an inner variable diameter surface and an inner equal diameter surface, and the beginning of the external thread is provided with There is an outer transition surface located between the outer crest and the outer tooth bottom, the outer transition surface includes an outer variable diameter surface and an outer equal diameter surface, and the inner tooth crest at the intersection of the internal thread and the inner transition surface has a complete width and The inner root has an incomplete width, the outer crest at the intersection of the outer thread and the outer transition surface has a full width and the outer root has an incomplete width.

The inner variable-diameter surface and the inner equal-diameter surface of the inner transition surface are tangent concave cylindrical surfaces, the inner equal-diameter surface and the internal thread are concentric, the outer variable-diameter surface and the outer equal-diameter surface of the outer transition surface The surfaces are respectively tangent convex cylinder and concave cylinder surface, and the outer equal-diameter surface and the external thread are concentric.

Compared with the prior art, the present invention has the advantages of:

In the modular cutting tool with multiple radial clamping of the present invention, the cylindrical platform and the conical platform are respectively in contact with the cylindrical recess and the conical recess for radial positioning, so as to realize double radial over-positioning of the cutting parts. Hold, which greatly improves the positioning strength and accuracy of cutting parts, the external thread and the internal thread are matched, and the cylindrical platform and the conical platform are respectively located on both sides of the external thread, and the cylindrical recess and the conical recess are respectively located on the internal thread. On both sides, the radial positioning distribution is balanced and the precision is high. At the same time, the interference between the conical surface and the cylindrical surface between the clamping part and the cutting part can be precisely designed to ensure the full contact between the conical surface and the cylindrical surface, which greatly improves the cutting efficiency. The clamping rigidity of the parts can effectively reduce the deformation between the clamping parts and the interface of the cutting parts, thereby improving the maximum overhang length ratio and cutting life of the cutting parts, especially the cutting depth can be more than doubled.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of a modular cutting tool with multiple radial clamping according to the present invention.

Figure 2 is a front view of a modular cutting tool with multiple radial clamps of the present invention.

Fig. 3 is a view of A-A in Fig. 2 .

Fig. 4 is a three-dimensional structural view of the clamping part of the modular cutting tool with multiple radial clamps of the present invention.

Fig. 5 is a three-dimensional structural view of a cutting component of a modular cutting tool with multiple radial grips according to the present invention.

Fig. 6 is a front view of a cutting element of a modular cutting tool with multiple radial clamping according to the present invention.

Each label in the figure means:

1. Clamping part; 11. Clamping shank; 12. Clamping head; 121. Clamping recess; 122. Internal thread; 1221. Internal tooth top; 1222. Internal tooth bottom; 1223. Internal transition surface; 12231, inner variable diameter surface; 12232, inner equal diameter surface; 1225, inner bottom surface; 123, cylindrical recess; 124, tapered recess; 13, clamping end face; 2, cutting parts; 21, cutting head; 22, cutting tail; 221, clamping protrusion; 222, external thread; 2221, external crest; 2222, external bottom; 2223, external transition surface; 22231, external variable diameter surface; 22232, external equal diameter surface; 2225 , the outer end surface; 223, the cylindrical platform; 224, the conical platform; 2241, the cylindrical surface of the convex platform; 23, the step surface; 24, the central axis of rotation.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "horizontal", "inner", "outer", "top", "bottom", etc. indicate that the orientation or positional relationship is Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood To limit the present invention.

1 to 6 show an embodiment of the modular cutting tool with multiple radial clamping of the present invention, the modular cutting tool with multiple radial clamping comprises a clamping part 1 and a 1 on the cutting part 2, the clamping part 1 includes a clamping handle 11 and a clamping head 12, the cutting part 2 includes a cutting head 21 and a cutting tail 22, the cutting tail 22 is provided with a clamping protrusion 221, and the clamping The clamping end surface 13 of the head 12 is provided with a clamping recess 121. The clamping protrusion 221 includes a cylindrical platform 223, an external thread 222 and a conical platform 224 arranged in sequence. The clamping recess 121 includes a columnar platform arranged in sequence. Shaped recess 123, internal thread 122 and conical recess 124, cylindrical platform 223, conical platform 224 contact with cylindrical recess 123, conical recess 124 respectively, external thread 222 cooperates with internal thread 122, column The shaped platform 223 and the tapered platform 224 are in contact with the cylindrical recess 123 and the tapered recess 124 respectively for radial positioning, so as to realize the double radial over-positioning and clamping of the cutting parts, which greatly improves the positioning strength and Accuracy, the external thread 222 cooperates with the internal thread 122, and the cylindrical platform 223 and the conical platform 224 are respectively located on both sides of the external thread 222, and the cylindrical recess 123 and the conical recess 124 are respectively located on both sides of the internal thread 122. The radial positioning distribution is balanced and the precision is high. At the same time, the interference between the conical surface and the cylindrical surface between the clamping part 1 and the cutting part 2 can be precisely designed to ensure that the conical surface and the cylindrical surface are in full contact, which greatly improves the precision of the cutting part. The clamping rigidity can effectively reduce the deformation between the clamping part 1 and the cutting part 2 interface, thereby improving the maximum overhang length ratio and cutting life of the cutting part 2, especially the cutting depth can be more than doubled.

In this embodiment, the cylindrical platform 223, the external thread 222 and the conical platform 224 are arranged in sequence along the direction away from the cutting head 21, and the conical recess 124, the internal thread 122 and the cylindrical recess 123 are arranged along the direction away from the clamping handle. 11 directions are set in sequence.

In this embodiment, both the clamping protrusion 221 and the clamping recess 121 are symmetrical about the rotation center axis 24 of the modular cutting tool.

In this embodiment, the cone angle of the conical pedestal 224 is θ2, and the cone angle of the conical recess 124 is θ1. After the elastic deformation of the conical recess 124 can fully contact with the conical pedestal 244, the clamping part 1 The clamping end surface 13 and the stepped surface 23 of the cutting part 2 can also be fully contacted, and should satisfy: 1°≤θ1≤3°, 1°≤θ2≤3°, 10'≤θ2-θ1≤45', this embodiment Among them, θ1=2.5°, θ2=2.55°.

In this embodiment, the diameter of the cylindrical recess 123 is D, and the diameter of the cylindrical platform 223 is d. Stability, according to the cutting conditions of the cutting part 2, the interference between the cylindrical recess 123 and the cylindrical table 223 can be flexibly controlled, and should meet: -0.02mm≤D-d≤0.02mm, in order to fully improve the rigidity and Cutting efficiency, preferably, 0.003mm≤D-d≤0.02mm, in this embodiment, D-d=0.01mm.

In this embodiment, a stepped surface 23 is provided between the cutting head 21 and the cutting tail 22, and the clamping end surface 13 of the clamping head 12 is in conflict with the stepped surface 23, that is, the clamping part 1 passes through the conical recess 124, The clamping end surface 13 is in corresponding contact with the tapered boss 224 and the stepped surface 23 of the cutting part 2 respectively, so as to achieve dual axial clamping of the cutting part 2 and further improve the impact resistance and stability of the modular cutting tool.

In this embodiment, the tapered recess 124 is set on the inner bottom surface 1225 of the internal thread 122, the diameter of the intersection circle between the tapered recess 124 and the inner bottom surface 1225 is D1, and the tapered platform 224 is arranged on the outer end surface 2225 of the external thread 222 Above, the diameter of the intersection circle between the conical pedestal 224 and the outer end surface 2225 is d1, in order to ensure the interference effect between the conical recess 124 and the conical pedestal 244 to improve the positioning rigidity, it should satisfy: 0≤d1-D1≤ 0.02mm, in this embodiment, d1-D1=0.01mm.

In this embodiment, the root of the conical table 224 is provided with a boss cylindrical surface 2241, and the diameter of the boss cylindrical surface 2241 is d2. In order to reduce the grinding difficulty of the conical table 224 and avoid The interference contact with the tapered recess 124 should satisfy: 0.2mm≤d1-d2≤0.8mm, in this embodiment, d1-d2=0.5mm.

In this embodiment, the outer diameter of the external thread 222 is d3, and the lead P of the external thread 222 should satisfy: 0.3d3≤P≤0.8d3, In this embodiment, P=0.3d3.

In this embodiment, at the beginning of the internal thread 122, there is an internal transition surface 1223 between the internal tooth crest 1221 and the internal tooth bottom 1222. The internal transition surface 1223 includes an internal variable diameter surface 12231 and an internal equal diameter surface 12232. The beginning of the thread 222 is provided with an outer transition surface 2223 between the outer tooth crest 2221 and the outer tooth bottom 2222. The outer transition surface 2223 includes an outer variable diameter surface 22231 and an outer equal diameter surface 22232. The inner thread 122 and the inner transition surface The inner crest 1221 at the intersection of 1223 has a complete width and the inner root 1222 has an incomplete width, and the outer crest 2221 at the intersection of the external thread 222 and the outer transition surface 2223 has a complete width and the outer root 2222 has an incomplete width. Width, during the loading and unloading of clamping part 1 and cutting part 2, it can ensure that the internal thread 122 and external thread 222 of cemented carbide materials have good connection strength, and can effectively avoid the internal crest 1222 of the internal thread and the external crest of the external thread 2221 crashes, improve interface reliability.

In this embodiment, in order to ensure strict control of the external dimensions of the inner transition surface 1223 and the outer transition surface 2223 on the clamping part 1 and the cutting part 2 and to reduce manufacturing difficulty, the inner variable diameter surface 12231 of the inner transition surface 1223, the inner equal diameter The surface 12232 is a tangent concave cylindrical surface, the inner isodiameter surface 12232 is concentric with the internal thread 122, the outer variable diameter surface 22231 and the outer isodiameter surface 22232 of the outer transition surface 2223 are respectively a tangential convex cylinder and a concave cylindrical surface, and the outer The isodiametric surface 22232 and the external thread 222 are concentric.

In the above embodiments, the module interface between the cutting tool holding part 1 and the cutting part 2 adopts a double-headed large-raised thread structure with a large pitch, which is quick and easy to disassemble and assemble, and improves the connection strength between the holding part 1 and the cutting part 2 . But the present invention is not limited to this, according to the interface accuracy and size specification requirements of the clamping part 1 and the cutting part 2, the thread between the clamping part 1 and the cutting part 2 can also be designed as a single thread, three threads, etc. structure.

In the above embodiments, the internal thread on the clamping part 1 and the external thread on the cutting part 2 are straight lines, and the tooth profile angles on both sides are equal. The present invention is not limited thereto, and may also be The tooth profile can be designed in a shape such as an arc, and the tooth profiles on both sides can also be set in different shapes.

In the above embodiments, the modular cutting tool with multiple radial clamping is applied to the rotary tool, the present invention is not limited thereto, and the use of this interface technology in turning and other non-rotary tool structures should be within the scope of the present invention.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (11)

1. A modular cutting tool with multiple radial clamping, comprising a clamping part (1) and a cutting part (2) mounted on the clamping part (1), the clamping part (1) Including a clamping shank (11) and a clamping head (12), the cutting part (2) includes a cutting head (21) and a cutting tail (22), and the cutting tail (22) is provided with a clamping protrusion (221), the clamping end surface (13) of the clamping head (12) is provided with a clamping recess (121), which is characterized in that: the clamping protrusion (221) includes columns arranged in sequence shaped platform (223), external thread (222) and conical platform (224), and the clamping recess (121) includes cylindrical recess (123), internal thread (122) and conical recess arranged in sequence (124), the cylindrical platform (223) and the conical platform (224) are in corresponding contact with the columnar recess (123) and the conical recess (124) respectively, and the external thread (222) is in contact with the Cooperate with the internal thread (122). 2. The modular cutting tool with multiple radial clamping according to claim 1, characterized in that: said cylindrical platform (223), external thread (222) and conical platform (224) are away from said The direction of the cutting head (21) is arranged in sequence, and the conical recess (124), internal thread (122) and cylindrical recess (123) are arranged in sequence along the direction away from the clamping shank (11). 3. The modular cutting tool with multiple radial clamping according to claim 2, characterized in that: the clamping protrusion (221) and the clamping recess (121) are both about the modular cutting tool The central axis of rotation (24) is symmetrical. 4. The modular cutting tool with multiple radial clamping according to any one of claims 1 to 3, characterized in that: the cone angle of the conical pedestal (224) is θ2, and the conical concave The cone angle of the inlet (124) is θ1, which should satisfy: 1°≤θ1≤3°, 1°≤θ2≤3°, 10'≤θ2-θ1≤45'. 5. The modular cutting tool with multiple radial clamping according to any one of claims 1 to 3, characterized in that: the diameter of the cylindrical recess (123) is D, the cylindrical platform The diameter of (223) is d, which should satisfy: -0.02mm≤D-d≤0.02mm. 6. The modular cutting tool with multiple radial clamping according to any one of claims 1 to 3, characterized in that: a step is provided between the cutting head (21) and the cutting tail (22) surface (23), the clamping end surface (13) of the clamping head (12) interferes with the stepped surface (23). 7. The modular cutting tool with multiple radial clamping according to any one of claims 1 to 3, characterized in that: the tapered recess (124) is opened on the inner bottom surface of the internal thread (122) (1225), the diameter of the intersection circle between the conical recess (124) and the inner bottom surface (1225) is D1, and the conical platform (224) is arranged on the outer end surface of the external thread (222) ( 2225), the diameter of the intersection circle of the conical truncated (224) and the outer end surface (2225) is d1, which should satisfy: 0≤d1-D1≤0.02mm. 8. The modular cutting tool with multiple radial clamping according to claim 7, characterized in that: the root of the conical platform (224) is provided with a boss cylindrical surface (2241), and the boss cylindrical surface ( The diameter of 2241) is d2, which should satisfy: 0.2mm≤d1-d2≤0.8mm. 9. The modular cutting tool with multiple radial clamping according to any one of claims 1 to 3, characterized in that: the external diameter of the external thread (222) is d3, the external thread (222 ) lead P should satisfy: 0.3d3≤P≤0.8d3. 10. The modular cutting tool with multiple radial clamping according to any one of claims 1 to 3, characterized in that: the start of the internal thread (122) is provided with a crest (1221 ), the inner transition surface (1223) between the inner tooth bottom (1222), the inner transition surface (1223) includes an inner variable diameter surface (12231) and an inner equal diameter surface (12232), and the outer thread (222) There is an outer transition surface (2223) between the outer tooth crest (2221) and the outer tooth bottom (2222) at the beginning of the outer tooth. The outer transition surface (2223) includes the outer variable diameter surface (22231) and the outer equal diameter surface (22232), the internal crest (1221) at the intersection of the internal thread (122) and the internal transition surface (1223) has a complete width and the internal tooth bottom (1222) has an incomplete width, and the external thread (222 ) intersects the outer transition surface (2223) with an outer crest (2221) having a full width and an outer root (2222) having an incomplete width. 11. The modular cutting tool with multiple radial clamping according to claim 10, characterized in that: the inner variable diameter surface (12231) and the inner equal diameter surface (12232) of the inner transition surface (1223) are Tangent concave cylindrical surface, the inner isodiameter surface (12232) is concentric with the internal thread (122), the outer variable diameter surface (22231) and the outer isodiameter surface (22232) of the outer transition surface (2223) They are respectively tangential convex cylinder and concave cylindrical surface, and the outer equal-diameter surface (22232) and the external thread (222) are concentric.

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