CN106475620B

CN106475620B - Detachable rotary cutter

Info

Publication number: CN106475620B
Application number: CN201610938745.1A
Authority: CN
Inventors: 江爱胜; 魏蕊妮; 王社权; 刘敏; 项兴东; 王东海
Original assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Current assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2020-05-05
Anticipated expiration: 2036-10-25
Also published as: CN106475620A

Abstract

The invention discloses a detachable rotary cutter, which comprises a cutting part and a clamping part, wherein the cutting part comprises a cutting part and a connecting part which are connected into a whole, the connecting part is in threaded connection with the clamping part, the cutting part is provided with an intersecting end surface and a peripheral surface, the cutting part is provided with at least one pair of transmission grooves which are symmetrical with each other and are integrally formed with the cutting part on an intersecting line of the end surface and the peripheral surface, each transmission groove comprises a bottom surface and side surfaces arranged at two sides of the bottom surface, two end transition surfaces which are integrally formed with the transmission grooves are arranged between the end surface, the bottom surface and the two side surfaces, and two peripheral transition surfaces which are integrally formed with the transmission grooves are arranged between the peripheral. The rotary cutter has the advantages of easy molding, low cost, long service life and capability of avoiding the collapse of disassembly and assembly.

Description

Detachable rotary cutter

Technical Field

The invention mainly relates to a metal cutting machining tool, in particular to a detachable rotary tool.

Background

The rotary cutter is in the course of working, the rotary cutter only participates in the cutting by the cutting part, the clamping part does not participate in the cutting, avoid cutting the part damage and cause the scrapping of whole rotary cutter, lengthen the life time of the rotary cutter, the cutting part and clamping part of the rotary cutter are set up independently in the trade, wherein the cutting part uses the carbide to make, the clamping part is made by steel or carbide, the clamping part loads and unloads the cutting part on the clamping part repeatedly through the connection mode that can dismantle repeatedly, because the cutting part is compact in structure, and because the toughness of carbide is relatively poor, it breaks to make the cutting part lose efficacy to easily take place during loading and unloading, the loading and unloading of this kind of rotary cutter is difficult. Especially, when the rotary cutter is applied to hole machining, because the end face and the side face are provided with the cutting edges, in order to ensure smooth chip discharge of a sealed machining area, a chip groove with a large space is generally arranged between the cutting edges, the actual strength of a cutting part is low, and the cutting part is easy to break and break when the cutting part is assembled and disassembled, so that the cutting part and even a clamping part are scrapped.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a detachable rotary cutter which is easy to form, low in cost, long in service life and capable of avoiding the defect of disassembly and assembly.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a can dismantle rotary cutter, includes cutting member and hold assembly, the cutting member is including connecting cutting portion and connecting portion as an organic whole, connecting portion and hold assembly threaded connection, be equipped with crossing terminal surface and global on the cutting portion, the cutting portion be equipped with at least a pair of mutual symmetry on terminal surface and global intersection line and with cutting portion integrated into one piece's transmission groove, the transmission groove includes the bottom surface and sets up the side in the bottom surface both sides, be equipped with two sections tip transition faces with transmission groove integrated into one piece between terminal surface and bottom surface and two sides, be equipped with two sections week transition faces with transmission groove integrated into one piece between global and two sides.

As a further improvement of the above technical solution:

the height of the transmission groove along the axial direction of the cutting part is L1, the height of the end transition surface connected with the side surface along the axial direction of the cutting part is L2, and L2 is more than or equal to 0.1L 1 and less than or equal to 0.3L 1.

The axial height of the cutting part is L, and L1 is more than or equal to 0.2L and less than or equal to 0.5L.

The length of the transmission groove along the radial direction of the cutting part is D1, the length of the peripheral transition surface connected with the side surface along the radial direction of the cutting part is D2, and D2 is more than or equal to 0.1D 1 and less than or equal to 0.3D 1.

The radius of the cutting part is r, and the following requirements are met: d1 is more than or equal to 0.3r and less than or equal to 0.5 r.

The opening size of the transmission groove is larger than the bottom size, the included angle between the two side surfaces is α, and α is more than or equal to 1 degree and less than or equal to 8 degrees.

And a bottom transition surface which is integrally formed with the transmission groove is arranged between the bottom surface and the two side surfaces.

The bottom transition surface is an inclined surface or an arc surface.

The two end transition surfaces are inclined surfaces and/or cambered surfaces respectively.

The two peripheral transition surfaces are inclined surfaces and/or cambered surfaces respectively.

Compared with the prior art, the invention has the advantages that:

according to the detachable rotary cutter, the cutting part is in threaded connection with the clamping part through the connecting part to form a detachable structure, and the cutting part is driven to rotate by the torque force of the transmission groove only by extending the fastening tool into the symmetrical transmission groove, so that the cutting part can be dismounted and mounted without damage. This driving groove and cutting portion integrated into one piece need not design the shaping driving groove through the method of getting rid of the material, has effectively reduced the production degree of difficulty and the processing cost of cutting part, and convenient to use has very outstanding price/performance ratio advantage. Meanwhile, the integrally formed transition surfaces of the two end portions and the two peripheral portions ensure smooth transition of the intersection of the transmission groove and the end surface and the peripheral surface, and effectively avoid the transmission groove from generating sharp edges to break up, so that the edge structural strength is improved.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention.

Fig. 2 is a schematic perspective view of a cutting member according to example 1 of the present invention.

Fig. 3 is a schematic sectional structure view of H-H of fig. 2.

Fig. 4 is a schematic perspective view of the cutting member according to embodiment 1 of the present invention (the dimensional relationship between the end transition surface and the peripheral transition surface and the drive groove).

Fig. 5 is a schematic top view of a cutting member according to example 1 of the present invention.

Fig. 6 is a side view schematically showing the structure of a cutting member in example 1 of the present invention.

Fig. 7 is a schematic perspective view of embodiment 2 of the present invention.

The reference numerals in the figures denote:

1. a cutting member; 11. a cutting portion; 111. an end face; 112. a peripheral surface; 12. a connecting portion; 2. a clamping member; 3. a transmission groove; 31. a bottom surface; 32. a side surface; 33. an end transition surface; 34. a peripheral transition surface; 35. a bottom transition surface.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

Example 1:

fig. 1 to 6 show a first embodiment of a detachable rotary tool according to the present invention, which includes a cutting member 1 and a clamping member 2, the cutting member 1 includes a cutting portion 11 and a connecting portion 12 integrally connected, the connecting portion 12 is screwed with the clamping member 2, the cutting portion 11 is provided with an intersecting end surface 111 and a peripheral surface 112, the cutting portion 11 is provided with at least a pair of transmission grooves 3 symmetrical to each other and integrally formed with the cutting portion 11 on an intersecting line of the end surface 111 and the peripheral surface 112, the transmission grooves 3 include a bottom surface 31 and side surfaces 32 disposed on both sides of the bottom surface 31, two end transition surfaces 33 integrally formed with the transmission grooves 3 are disposed between the end surface 111 and the bottom surface 31 and between the two side surfaces 32, and two peripheral transition surfaces 34 integrally formed with the transmission grooves 3 are disposed between the peripheral surface 112 and the two side surfaces 32. According to the rotary cutter, the cutting part 1 is in threaded connection with the clamping part 2 through the connecting part 12 to form a detachable structure, and the cutting part 1 is driven to rotate by torsion force of the transmission groove 3 only by extending a fastening tool into the symmetrical transmission groove 3, so that the cutting part 1 can be dismounted and mounted without damage. This driving groove 3 and cutting portion 11 integrated into one piece need not design shaping driving groove 3 through the method of getting rid of the material, has effectively reduced the production degree of difficulty and the processing cost of cutting part 1, and convenient to use has very outstanding price/performance ratio advantage. Meanwhile, the two end transition surfaces 33 and the two peripheral transition surfaces 34 are integrally formed, so that smooth transition at the intersection of the transmission groove 3 and the end surface 111 and the peripheral surface 112 is guaranteed, sharp edges of the transmission groove 3 are effectively prevented from being broken, the structural strength of the edge is improved, and on the other hand, the fastening tool can only be in contact transmission with the side surfaces 32 at two sides of the transmission groove 3, and has a large contact area and a large edge distance when the cutting part 11 is assembled and disassembled, stress concentration is effectively avoided, and the service life of the rotary cutter is prolonged.

In this embodiment, the height of the driving groove 3 in the axial direction of the cutting portion 11 is L1, the height of the end transition surface 33 connected with the side surface 32 in the axial direction of the cutting portion 11 is L2, the axial height of the cutting portion 11 is L, the length of the driving groove 3 in the radial direction of the cutting portion 11 is D1, the length of the peripheral transition surface 34 connected with the side surface 32 in the radial direction of the cutting portion 11 is D2, and the radius of the cutting portion 11 is r, so as to ensure the edge strength and smooth transition of the driving groove 3, the end surface 111 and the peripheral surface 112, and at the same time, when the fastening tool is attached to or detached from the cutting portion 11, the fastening tool has a large contact area with the driving groove 3 and the contact is in the central region of the side surface: l2 is more than or equal to 0.1L 1 and less than or equal to 0.3L 1, L1 is more than or equal to 0.2L and less than or equal to 0.5L, and D2 is more than or equal to 0.1D 1 and less than or equal to 0.3D 1, and the following conditions are met: 0.3r is less than or equal to D1 is less than or equal to 0.5r, in the embodiment: l1=0.3L, L2=0.06L, D1=0.4 r, D2=0.08 r.

In the embodiment, the size of the opening of the transmission groove 3 is larger than that of the bottom surface 31, the included angle between the two side surfaces 32 is α degrees, α is more than or equal to 1 degree and less than or equal to 8 degrees, and in the embodiment, α is 4 degrees, and the structure of the included angle α can effectively reduce the circumferential pressure borne by the side surfaces 32 in the loading and unloading process.

In this embodiment, a bottom transition surface 35 integrally formed with the driving groove 3 is provided between the bottom surface 31 and the two side surfaces 32. The arrangement of the bottom transition surface 35 facilitates the integral molding of the driving groove 3.

In this embodiment, the bottom transition surface 35 is a bevel or an arc. The structure is simple and the forming is easy.

In this embodiment, the two end transition surfaces 33 are respectively inclined surfaces and/or arc surfaces. The structure is simple and the forming is easy.

In the present embodiment, the two peripheral transition surfaces 34 are inclined surfaces and/or arc surfaces, respectively. The structure is simple and the forming is easy.

Example 2:

as shown in fig. 7, a second embodiment of the detachable rotary cutter according to the present invention is substantially the same as embodiment 1 except that: the embodiment is applied to milling, and two pairs of transmission grooves 3 are arranged on the cutting part 11.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A detachable rotary cutting tool, comprising a cutting part (1) and a clamping part (2), wherein the cutting part (1) comprises a cutting part (11) and a connecting part (12) which are connected into a whole, the connecting part (12) is in threaded connection with the clamping part (2), and the cutting part (11) is provided with an intersected end surface (111) and a peripheral surface (112), which is characterized in that: the cutting part (11) is provided with at least one pair of mutually symmetrical transmission grooves (3) which are integrally formed with the cutting part (11) on the intersection line of the end surface (111) and the circumferential surface (112), each transmission groove (3) comprises a bottom surface (31) and side surfaces (32) arranged on two sides of the bottom surface (31), two end transition surfaces (33) which are integrally formed with the transmission grooves (3) are arranged between the end surface (111) and the bottom surface (31) and between the two side surfaces (32), two circumferential transition surfaces (34) which are integrally formed with the transmission grooves (3) are arranged between the circumferential surface (112) and the two side surfaces (32), each circumferential transition surface (34) is formed by connecting an inner section and an outer section, each circumferential transition surface (34) of the inner section is an arc surface, each circumferential transition surface (34) of the outer section is an inclined surface, each end transition surface (33) is formed by connecting the inner section and the outer section, and each end transition surface (33) of the inner section, the end transition surface (33) of the outer section is an inclined surface, the height of the transmission groove (3) along the axial direction of the cutting part (11) is L1, the height of the end transition surface (33) connected with the side surface (32) along the axial direction of the cutting part (11) is L2, L2 is more than or equal to 0.1L 1 and less than or equal to 0.3L 1, the axial height of the cutting part (11) is L, L1 is more than or equal to 0.2L and less than or equal to 0.5L, the length of the transmission groove (3) along the radial direction of the cutting part (11) is D1, the length of the peripheral transition surface (34) connected with the side surface (32) along the radial direction of the cutting part (11) is D2, D2 is more than or equal to 0.1D 1 and less than or equal to 0.3D 1, the radius of the cutting part (11) is: d1 is more than or equal to 0.3r and less than or equal to 0.5 r.

2. The detachable rotary cutter according to claim 1, wherein the opening of the driving groove (3) is larger than the bottom surface (31), and the included angle between the two side surfaces (32) is α, 1- α -8 °.

3. The detachable rotary tool of claim 1 or 2, wherein: and a bottom transition surface (35) which is integrally formed with the transmission groove (3) is arranged between the bottom surface (31) and the two side surfaces (32).

4. The removable rotary cutter according to claim 3, wherein: the bottom transition surface (35) is an inclined surface or an arc surface.