GB2587589A

GB2587589A - An indexable gear facing cutter

Info

Publication number: GB2587589A
Application number: GB2100498.1A
Authority: GB
Inventors: Zhang Xiaoyang
Original assignee: Hangzhou Sanwo Intelligent Tech Co Ltd
Current assignee: Hangzhou Sanwo Intelligent Tech Co Ltd
Priority date: 2020-06-19
Filing date: 2021-01-15
Publication date: 2021-03-31
Anticipated expiration: 2041-01-15
Also published as: JP6777922B1; GB2587589B; CN111673202A; JP2022001400A; GB202100498D0

Abstract

The gear facing cutter includes a cutter body 1 with a shaft hole 1a, chip discharging passages 1b, and cutter grooves (1c, Figure 3). The cutter grooves are spaced at regular intervals along a circumference of the body. The cutter grooves extend in a radial direction of the body. The chip discharging passages are disposed between adjacent cutter grooves. The front part of each cutter groove 1c is composed of two first inclined walls 1c1, and a bottom wall for connecting the first inclined walls. Restriction surfaces 1c2 are arranged on inner walls of a rear part of each cutter groove. Pressing blocks 3 are removably connected to the cutter body. Two second inclined walls (2a, Figure 4) are located on bottom walls of cutter blades 2. The pressing blocks press tightly on top walls of the cutter blades and drive the first inclined walls 1c1 to closely contact a corresponding one of the second inclined walls 2a. Through holes (1f, Figure 2) locate the pressing blocks via a screw 4. The through holes also contain a spring 6 and a magnet 7.

Description

AN INDEXABLE GEAR FACING CUTTER

TECHNICAL FIELD

[0001] The present invention belongs to a technical field of mechanical engineering, relates to a cutter structure, in particular to an indexable gear facing cutter.

BACKGROUND OF THE INVENTION

[0002] Gear transmission is a mechanical transmission to make use of two gear teeth meshing with each other to transmit power and movement, and application range is between module M2-M7; the gear transmission has some advantages like stability, accurate transmission ratio, reliable operation, high efficiency, long using life, large in using power, speed and size; according to different using purpose, the rotation forms and gear types are different; the general gears are divided in terms of different respective positions of two of gear shafts in mechanism into three types: parallel of two axes, intersection of two axes and intersection of two axes(neither paralleled nor intersected with each other); the gear has applied widespread, which is an important basic part for mechanized equipment and is widely used in industrial and vehicle field like gearboxes for rail transit vehicles, mechanical gearbox, high-speed gearbox, small gears of the gearboxes in aerospace, military and general equipment.

[0003] The existing gear processing mechanism, like a gear milling cutter apparatus [application No.: 201410124708.8] disclosed in China Patent Database comprises cutter blades and cutter discs, wherein driving shaft hole are disposed on centers of the cutter discs, wherein at least one of cutter placement grooves is arranged on circular surfaces of the cutter discs along a radial direction, wherein cutter blades bases are arranged on side walls of the cutter placement grooves, wherein the cutter blades are mounted on the cutter blades bases and cutter heads of the cutter blades are exposed and arranged on circular surfaces of the cutter discs, and shapes of cross sections of the cutter heads of the cutter blades are matched with shapes of cross sections of gear grooves of the gears to be processed.

[0004] The above milling cutter apparatus is used to process gears at the same time by arranging a plurality of cutter blades, which has a relative high processing efficiency; however, a continuous adjustment to the milling cutter apparatus is required when the cutter blades are installed, therefore, the installation is relatively inconvenient.

BRIEF SUMMARY OF THE INVENTION

[00051 The technical problem to be solved by the invention is to provide an indexable gear facing cutter, so as to overcome the problems existing in the prior art.

[00061 To achieve the above objective, the present invention achieves the following technical solution: an indexable gear facing cutter comprises a cutter body with a shaft hole, wherein chip discharging passages and cutter grooves for placing cutter blades are arranged on the cutter body, wherein a plurality of the cutter grooves are spaced at regular intervals along a circumferential direction of the cutter body, and lengths of the cutter grooves extend along a radial direction of the cutter body, and the chip discharging passages are disposed between adjacent two of the cutter grooves, wherein front parts of the cutter grooves are composed of two of first inclined walls and a bottom wall for connecting two of the first inclined walls, and restriction surfaces abutted against rear end surfaces of the cutter blades are arranged on inner walls of rear parts of the cutter grooves; pressing blocks which are removable are fixedly connected to the cutter body, wherein the pressing blocks have the same numbers as the cutter blades and positions of the pressing blocks are corresponding to the positions of the cutter blades one by one, and two of second inclined walls respectively matched with two of the first inclined walls are arranged on bottom walls of the cutter blades, and the pressing blocks press tightly on top walls of the cutter blades and drive the first inclined walls to closely contact a corresponding one of the second inclined walls.

[0007] Under an cooperation of the restriction surfaces and the rear end surfaces of the cutter blades, the first inclined walls and the second inclined walls, the cutter blades is pre-located along circumferential and radial directions of the cutter body, and the cutter blades are mounted in place for one time under extrusion forces of the pressing blocks, and no more position adjustments are made to the cutter blades in above process, which has advantages like replacing the cutter blades more conveniently and locating the cutter blades with a higher precision [0008] In abo stated indexable gear facing cutter, wherein the front parts of preferred one of the cutter grooves and the pressing blocks are all inclined downward, and inclined directions of the cutter blades are the same as the cutter grooves, and then the cutter blades have a tendency for abutting against the restriction surfaces to enhance a stability of the cutter blades for being located.

[0009] In above-stated indexable gear facing cutter, wherein the pressing blocks are on tube-shaped, and the locating holes arranged along axial directions of the pressing blocks are mounted on the cutter body, wherein the number of the locating holes is the same as the pressing blocks and the positions of the locating holes are corresponded to the positions of the pressing blocks one by one, and shapes and sizes of front parts of the locating holes are matched with the pressing blocks, and lower sides of the front parts of the locating holes are opened; rear parts of the locating holes define internal thread, and the pressing blocks insert into the front parts of corresponding one of the locating holes, and lower sides of the pressing blocks extrude out from the openings to press tightly on the cutter blades, and rod portions of screws pass through the pressing blocks and are threaded to rear parts of the locating holes, and the pressing blocks are removably and fixedly connected with the cutter body, wherein heads of preferred one of the screws press against front end surfaces of the pressing blocks, and the locating holes are designed to locate the pressing blocks to promote the pressing blocks to be mounted in place at one time, thereby to further avoid a working procedure adjustment to positions, which can further improve a convenience for changing the cutter blades.

[0010] In above-stated indexable gear facing cutter, wherein the cutter body is provided with through holes, wherein number of the through holes is the same as the locating holes, and positions of the through holes are corresponded to the positions of the locating holes, one end of each of the through holes extends into a hole wall of a corresponding one of the shaft hole, and another end of each of the through holes is communicated with a corresponding one of the locating holes, wherein each of the through holes defines one of springs and one of magnetic blocks which can slide along an axial direction of the through holes, and the magnetic blocks are located between the springs and rod parts of the screws, and the screws are magnetically absorbed on end surfaces of the rod parts of the screws, and two ends of the springs are respectively abutted against the screws and inner walls of the through holes, and a tension the screws subject to when in cutting is buffered with elastic deformations of the springs to ensure that the screws are blocked within the locating holes all the time, thereby a stability and a strength of the cutter blades for being located are improved to improve a processing precision.

[0011] In above-stated indexable gear facing cutter, wherein the springs are fixedly connected with the magnetic blocks, and the through holes are on round holes and apertures of the through holes are larger than that of the locating holes, and the magnetic blocks are on round shape matched with the through holes, and outer circumferential surfaces of the magnetic blocks are abutted against hole walls of the through holes, and lubricating oil is evenly coated on the outer circumferential surfaces of the magnetic blocks to form a layer of oil film; whereby such an arrangement can restrain the magnetic blocks from moving towards the through holes, so as to the screws are separated from the magnetic blocks.

[0012] In above-stated indexable gear facing cutter, wherein the magnetic blocks are fixedly connected with the springs by welding.

[0013] In above--stated indexable gear facing cutter, wherein and ports of the through holes on the hole walls of the shaft hole are blocked by plugs, wherein the plugs are fixedly connected with the cutter body, and one ends of the springs far away from the magnetic blocks are abutted against the plugs.

[0014] In above-stated indexable gear facing cutter, wherein cross sections of bottom walls of the cutter grooves are sunken circular arcs, wherein heat dissipating channels penetrating in strips are formed between the cutter blades and the bottom walls of the cutter grooves.

[0015] In above-stated indexable gear facing cutter, wherein heat dissipating holes penetrating downward are arranged on the bottom walls of the cutter grooves, and two sides of the heat dissipating holes respectively extend onto two of the first inclined walls.

[0016] Compared with prior art, the benefits of the invention are as follows: 1. under an cooperation of the restriction surfaces and the rear end surfaces of the cutter blades, the first inclined walls and the second inclined walls, the cutter blades is pre-located along circumferential and radial directions of the cutter body, and at the same time, the pressing blocks are pre-located through locating holes, so that the cutter blades are mounted in place for one time under extrusion forces of the pressing blocks, and no more position adjustments are made to the cutter blades in above process, which has advantages like replacing the cutter blades more conveniently and locating the cutter blades with a higher precision; 2. the front parts of the cutter grooves and the pressing blocks are all inclined downward, and inclined directions of the cutter blades are the same as the cutter grooves, so when the pressing blocks lock the cutter blades, the cutter blades have a tendency for abutting against the restriction surfaces to enhance a stability of the cutter blades for being located; 3. a tension the screws subject to when in cutting is buffered with elastic deformations of the springs to ensure that the screws are blocked within the locating holes all the time, thereby a stability and a strength of the cutter blades for being located are improved to improve a processing precision.

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG. 1 is a perspective view of an indexable gear facing cutter, [0018] FIG. 2 is a cross-sectional view of the indexable gear facing cutter; [0019] FIG. 3 is a schematic structural diagram of cutter grooves; [0020] FIG. 4 is a schematic structural diagram of cutter blades; [0021] In figures, a cutter body 1, a shaft hole la, chip discharging passages lb, cutter grooves lc, first inclined walls 1cl, restriction surfaces 1c2, locating holes id, heat dissapating holes le, through holes if cutter blades 2, second inclined walls 2a, pressing blocks 3, screws 4, heat di ssapating channels 5. springs 6, magnetic blocks 7 and plugs 8.

DETAILED DESCRIPTION OF THE INVENTION

[0022] The following is only the further description of the technical proposal of this invention in combination with the specific embodiments and drawings, but the protection scope of the present invention is not limited thereto.

[0023] Referring IC an able gear facing cutter comprises a cutter body I with a shaft hole la, wherein chip discharging passages lb and cutter grooves 1c for placing cutter blades 2 are arranged on the cutter body I, wherein a plurality of the cutter grooves lc are spaced at regular intervals along a circumferential direction of the cutter body 1, and lengths of the cutter grooves lc extend along a radial direction of the cutter body 1, and the chip discharging passages lb are disposed between adjacent two of the cutter grooves I c.

[0024] Specifically, referring to FIG. 1, 3 and 4, front parts of the cutter grooves lc are composed of two of first inclined walls lci and a bottom wall for connecting two of the first inclined walls 1cl; for actual products, in terms of structures of the cutter blades 2, inclined angles of two of the first inclined walls 1c1 can be same or different; restriction surfaces 1c2 abutted against rear end surfaces of the cutter blades 2 are arranged on inner walls of rear parts of the cutter grooves I c, and pressing blocks 3 which are removable are fixedly connected to the cutter body I, wherein the pressing blocks 3 have the same numbers as the cutter blades 2 and. positions or the pressing blocks 3 are corresponding to the positions of the cutter blades 2 one by one, and two of second inclined walls 2a respectively matched with two of the first inclined walls lel are arranged on bottom walls of the cutter blades 2, and the pressing blocks 3 press tightly on top walls of the cutter blades 2 and drive the first inclined walls I el to closely contact a corresponding one of the second inclined walls 2a.

[0025] In this embodiment,preferably, the front parts of the cutter grooves I c and the pressing blocks 3 are all inclined downward, and inclined directions of the cutter blades 2 are the same as the cutter grooves 1 c, and at this time, positions of front ends of the pressing blocks 3 are higher than positions of rear ends of the pressing blocks 3, so when the pressing blocks 3 lock, the cutter blades 2, the cutter blades 2 have a tendency for abutting against the restriction surfaces 1c2 to enhance a stability of the cutter blades 2 for being located.

[0026] Und 1 cooperation of the restriction surfaces 1c2 and the rear end surfaces of the cutter blades 2, the first inclined walls lc I and the second inclined walls 2a, the cutter blades 2 is pre-located along circumferential and radial directions of the cutter body I, and at the same time, the pressing blocks 3 are pre-located through locating holes Id, so that the cutter blades 2 are mounted in place for one time under extrusion forces of the pressing blocks 3, and no more position adjustments are made to the cutter blades 2 in above process, which has advantages like replacing the cutter blades 2 more conveniently and locating the cutter blades 2 with a higher precision.

[0027] Wherein mounting methods of e pressing blocks 3 are specifically as follows: 100281 Referring to FIG. 1 and 2, the pressing blocks 3 are on tube-shaped and two ends of the pressing blocks 3 are opened, and the locating holes Id arranged along axial directions of the pressing blocks 3 are mounted on the cutter body 1, wherein the number of the locating holes id is the same as the pressing blocks 3 and the positions of the locating holes Id are corresponded to the positions of the pressing blocks 3 one by one, and shapes and sizes of front parts of the locating holes Id are matched with the pressing blocks 3, and lower sides of the front parts of the locating holes Id are twened, and rear parts of the locating holes Id define internal thread, and the pressing blocks 3 insert into the front parts of corresponding one of the locating holes Id, and lower sides of the pressing blocks 3 extrude out from the openings to press tightly on the cutter blades 2, and rod portions of screws 4 pass through the pressing blocks 3 and are threaded to rear parts of the locating holes Id, and the pressing blocks 3 are removably and fixedly connected with the cutter body 1, preferably, wherein heads of the screws 4 press against front end surfaces of the pressing blocks 3, that is, the heads of the the screws 4 are completely exposed to the outside for rotating the screws 4 conveniently, so that the cutter blades 2 are easy to be dismounted.

[00291 Referring to FIG. I, the cutter body 1 is provided with rough holes if wherein number of the through holes If is the same as the locating holes Id, and positions of the through holes [fare corresponded to the positions of the locating holes Id, and one end of each of the through holes if extends into a hole wall of a corresponding one of the shaft hole Ia. and another end of each of the through holes If is communicated with a corresponding one of the locating, holes i d, wherein each of the through holes if defines one of springs 6 and one of magnetic blocks 7 which can slide along an axial direction of the through holes if and the magnetic blocks 7 are located between the springs 6 and rod parts of the screws 4, wherein the screws 4 are made of permeability magnetic materials, and the permeability magnetic materials can be iron containing alloy and the screws 4 are magnetically absorbed on end surfaces of the rod parts of the screws 4" and two ends of the springs 6 are respectively abutted against the screws 4 and inner walls of the through holes if, and a tension the screws 4 subject to when in cutting is buffered with elastic deformations of the springs 6 to ensure that, the screws 4 are blocked within the locating holes ld all the time, thereby a stability and a strength of the cutter blades 2 for being located are improved to improve a processing precision.

[0030] For further explanation,the springs 6 are fixedly connected with the magnetic blocks 7, and preferably, the magnetic blocks 7 are fixedly connected with the springs 6 by welding, and the through holes I f are on round holes and apertures of the through holes if are larger than that of the locating holes Id, and the magnetic blocks 7 are on round shape matched with the through holes if, and outer circumferential surfaces of the magnetic blocks 7 are abutted a.gainst hole walls of the through holes if and lubricating oil is evenly coated on the outer circumferential surfaces of the magnetic blocks 7 to form a layer of oil film for improving a sliding smoothness of the magnetic blocks 7, and ports of the through holes if on the hole walls of the shaft hole la are blocked by plugs 8, wherein the plugs 8 are fixedly connected with the cutter body 1, and one ends of the springs 6 far away from the magnetic blocks 7 are abutted against the plugs 8.

[00311 Referrit.g to the FIG. 3, cross sections of bottom walls of the cutter grooves lc are sunken circular arcs, wherein heat dissipating channels 5 penetrating in strips are funned between the cutter blades 2 and the bottom walls of the cutter tu-ocives le, wherein heat dissipating holes le penetrating downward are arranged on the bottom walls of the cutter grooves lc, that is, upper ends of the heat dissipating holes le are communicated with the hea dissipating channels 5, and two sides of the heat dissipating holes le respectively extend onto two of the first inclined walls 1 c] to effectively accelerate a heat dissipation effect of the cutter blades 2.

[0032] What are described above are merely preferred embodiments of the present invention, and are not to limit the present invention, although a detailed description is made to this invention referring to the embodiments before, the person skilled in this art should understand that, some amendments are still made to the technical proposals recorded in the embodiments, or equivalent replacement is able to be made to parts of the technical features, and any modification, equivalent and improvement within the spirit and principles of the present invention shall be covered in the protective scope of the present invention.

Claims

CLAIMS1. An indexable gear facing cutter comprising: a cutter body with a shaft hole, wherein chip discharging passages and cutter grooves for placing cutter blades are arranged on the cutter body, wherein a plurality of the cutter grooves are spaced at regular intervals along a circumferential direction of the cutter body, and lengths of the cutter grooves extend along a radial direction of the cutter body, and the chip discharging passages are disposed between adjacent two of the cutter grooves, wherein front parts of the cutter grooves are composed of two of first inclined walls and a bottom wall for connecting two of the first inclined walls, and restriction surfaces abutted against rear end surfaces of the cutter blades are arranged on inner walls of rear parts of the cutter grooves; pressing blocks which are removable fixedly connected to the cutter body, wherein the pressing blocks have the same numbers as the cutter blades and positions of the pressing blocks are corresponding to the positions of the cutter blades one by one, and two of second inclined walls respectively matched with two of the first inclined walls are arranged on bottom walls of the cutter blades, and the pressing blocks press tightly on top walls of the cutter blades and drive the first inclined walls to closely contact a corresponding one of the second inclined walls 2. The indexable gear facing cutter defined in claim 1, wherein the front parts of preferred one of the cutter grooves and the pressing blocks are all inclined downward, and inclined directions of the cutter blades are the same as the cutter grooves 3. The indexable gear facing cutter defined in claim 2, wherein the pressing blocks are on tube-shaped, and the locating holes arranged along axial directions of the pressing blocks are mounted on the cutter body, wherein the number of the locating holes is the same as the pressing blocks and the positions of the locating holes are corresponded to the positions of the pressing blocks one by one, and shapes and sizes of front parts of the locating holes are matched with the pressing blocks, and lower sides of the front parts of the locating holes are opened; rear parts of the locating holes define internal thread, and the pressing blocks insert into the front parts of corresponding one of the locating holes, and lower sides of the pressing blocks extrude out from the openings to press tightly on the cutter blades, and rod portions of screws pass through the pressing blocks and are threaded to rear parts of the locating holes, and the pressing blocks are removably and fixedly connected with the cutter body, wherein heads of preferred one of the screws press against front end surfaces of the pressing blocks.4. The indexable gear facing cutter defined in claim 3, wherein the cutter body is provided with through holes, wherein number of the through holes is the same as the locating holes, and positions of the through holes are corresponded to the positions of the locating holes, and one end of each of the through holes extends into a hole wall of a corresponding one of the shaft hole, and another end of each of the through holes is communicated with a corresponding one of the locating holes, wherein each of the through holes defines one of springs and one of magnetic blocks which can slide along an axial direction of the through holes, and the magnetic blocks are located between the springs and rod parts of the screws, and the screws are magnetically absorbed on end surfaces of the rod parts of the screws, and two ends of the springs are respectively abutted against the screws and inner walls of the through holes.5. The indexable gear facing cutter defined in claim 4, wherein the springs are fixedly connected with the magnetic blocks, and the through holes are on round holes and apertures of the through holes are larger than that of the locating holes, and the magnetic blocks are on round shape matched with the through holes, and outer circumferential surfaces of the magnetic blocks are abutted against hole walls of the through holes, and lubricating oil is evenly coated on the outer circumferential surfaces of the magnetic blocks to form a layer of oil film.6. The indexable gear facing cutter defined in claim 5, wherein the magnetic blocks are fixedly connected with the springs by welding 7. The indexable gear facing cutter defined in claim 6, wherein ports of the through holes on the hole walls of the shaft hole are blocked by plugs, wherein the plugs are fixedly connected with the cutter body, and one ends of the springs far away from the magnetic blocks are abutted against the plugs.8 The indexable gear facing cutter defined in claim I, wherein cross sections of bottom walls of the cutter grooves are sunken circular arcs, wherein heat dissipating channels penetrating in strips are formed between the cutter blades and the bottom walls of the cutter grooves