CN215588459U

CN215588459U - Subtract heavy antivibration cutter arbor and digit control machine tool

Info

Publication number: CN215588459U
Application number: CN202121366417.1U
Authority: CN
Inventors: 贺超; 李劲松; 范援军; 任冬霞
Original assignee: North Navigation Control Technology Co ltd
Current assignee: North Navigation Control Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-21
Anticipated expiration: 2031-06-17

Abstract

The utility model provides a weight-reducing vibration-proof cutter bar and a numerical control machine tool, wherein the weight-reducing vibration-proof cutter bar comprises: the cutter bar comprises a cutter bar body, wherein a plurality of lightening holes are formed in the cutter bar body at intervals, a buffer piece is installed in each lightening hole, and the buffer pieces are in interference fit with the lightening holes and used for releasing vibration generated when the cutter bar body is machined. Through set up the lightening hole on the cutter arbor main part, can reduce the weight of cutter arbor, the convenient installation to the cutter arbor. Through installing the bolster in the lightening hole, can make the bolster absorb the vibration that the cutter arbor produced at the operation in-process to avoid causing the influence to the processingquality of product, the cutter arbor after the damping can further protect the blade in the cutting process simultaneously, prevents that it from appearing collapsing sharp phenomenon, has effectively prolonged the life of blade.

Description

Subtract heavy antivibration cutter arbor and digit control machine tool

Technical Field

The utility model relates to the technical field of machining, in particular to a weight-reducing anti-vibration cutter bar and a numerical control machine tool.

Background

At present, in some deep cavity parts with the shapes of conical revolution bodies, the deepest dimension of the deep cavity part is 350mm, the inner circle surface smoothness requirement is Ra1.6, namely, the surface roughness requirement is not lower than 1.6. In the manufacturing process, the water ripple phenomenon of the processed surface of the inner circle is found to be serious after the processing according to the traditional processing method, and the tip breaking condition of the processing blade is easy to occur in the product manufacturing process, so that the smooth operation of the processing task is difficult to ensure.

Aiming at the problems, equipment, a process, a cutter and the like are checked, and through comprehensive analysis, the vibration of the used common cutter bar is a key reason for causing the machined surface not to reach the standard and the cutter blade to be damaged, so that how to improve the cutter bar is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a weight-reducing vibration-proof cutter bar which can improve the processing quality of parts and prolong the service life of a blade.

The second purpose of the utility model is to provide a numerical control machine tool comprising the weight-reducing and vibration-proof cutter bar, which can reduce the vibration of the cutter bar in the product processing process and ensure the smooth processing of deep cavity parts.

The utility model provides a weight-reducing vibration-proof cutter bar, which comprises: the cutter bar comprises a cutter bar body, wherein a plurality of lightening holes are formed in the cutter bar body at intervals, a buffer piece is installed in each lightening hole, and the buffer pieces are in interference fit with the lightening holes and used for releasing vibration generated when the cutter bar body is machined.

Furthermore, the plurality of lightening holes are uniformly distributed along the axial direction of the cutter bar main body, and the central line of each lightening hole is intersected with the axis of the cutter bar main body.

Furthermore, the both sides of cutter arbor main part are provided with the confession the grafting face of bolster installation, the grafting face with the axis symmetry of cutter arbor main part sets up.

Furthermore, the lightening hole comprises a through hole formed in the insertion surface, and two ends of the through hole respectively extend to the insertion surface.

Further, the perforating hole is cylindric through-hole, the bolster include the appearance with cylindric through-hole assorted polytetrafluoroethylene cylinder.

Furthermore, one end of the cutter bar main body is connected with an installation rod, and a cutter containing groove for installing a cutter blade is arranged on the end face of the other end of the cutter bar main body.

Further, the tool containing groove comprises an installation groove surface parallel to the inserting surface, and the center line of the lightening hole is perpendicular to the installation groove surface.

Further, the mounting groove surface is provided with a fixing hole for mounting the blade, the fixing hole is a threaded hole, and the blade is mounted on the blade mounting groove through a bolt.

Further, the cutter bar main body and the mounting rod are integrally formed, and a mounting surface which is parallel to the insertion surface is arranged on the mounting rod.

The utility model also provides a numerical control machine tool which comprises the weight-reducing vibration-proof cutter bar.

The utility model has the following beneficial effects: through set up the lightening hole on the cutter arbor main part, can reduce the weight of cutter arbor, the convenient installation to the cutter arbor.

Through installing the bolster in the lightening hole, can make the bolster absorb the vibration that the cutter arbor produced at the operation in-process to avoid causing the influence to the processingquality of product, the cutter arbor after the damping can further protect the blade in the cutting process simultaneously, prevents that it from appearing collapsing sharp phenomenon, has effectively prolonged the life of blade.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of the overall structure of the weight-reducing vibration-proof cutter bar of the present invention;

FIG. 2 is a schematic front view of the weight-reducing vibration-proof tool bar of the present invention;

fig. 3 is a side view of the weight-reducing vibration-proof cutter bar of the utility model.

In the figure:

1-a main body of a cutter bar; 11-lightening holes; 12-a buffer; 13-inserting surface; 14-a tool loading slot; 15-fixing holes; 16-mounting a groove surface; 2-mounting a rod; 21-mounting surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 to 3, the weight-reducing vibration-proof tool bar provided by the present invention includes: the cutter bar comprises a cutter bar body 1, wherein a plurality of lightening holes 11 are formed in the cutter bar body 1 at intervals, a buffer piece 12 is installed in each lightening hole 11, and the buffer piece 12 is in interference fit with the lightening holes 11 and used for releasing vibration generated when the cutter bar body 1 is machined.

The weight-reducing anti-vibration cutter bar is mainly used for cutting and machining deep cavity parts, in the machining process of the deep cavity parts, the cutter bar and the cutter blade mounted on the cutter bar move along the axial direction of the parts, and the cutter blade cuts the parts through the parts in rotary motion to finish the cutting and machining of the cavities in the parts.

In prior art, because the processing machines and tools of installation cutter arbor can produce the vibration at the operation in-process, can indirectly lead to the tool bit vibration of connecting on the cutter arbor when driving the cutter arbor vibration, produce direct influence to the inside machined surface of dark chamber part, the water ripple appears in the interior round machined surface of processing product especially. In addition, due to the vibration generated by the blade, the blade is easy to tip, the machining is interrupted, and the machining efficiency of the deep cavity part is seriously influenced.

Through set up lightening hole 11 on the cutter arbor to install bolster 12 in lightening hole 11, can effectively offset the vibration that the cutter arbor produced in the course of working. The lightening holes 11 are arranged on the cutter bar main body 1 at intervals, so that self balance weight of the cutter bar main body 1 can be reduced on the premise of not influencing rigidity strength of the cutter bar main body 1, and the tendency of vibration of the cutter bar main body can be effectively reduced while the cutter bar main body is convenient to install.

The damper 12 installed in each lightening hole 11 can effectively break the transmission of the vibrating mechanical wave on the tool holder body 1. Specifically, the buffer parts 12 are installed in each lightening hole 11 arranged at intervals, so that the vibration mechanical wave generated by the cutter bar main body 1 between the adjacent lightening holes 11 can be absorbed, and the vibration mechanical wave is released through the buffer effect of the buffer parts 12, thereby effectively reducing the vibration of the cutter bar main body 1 in the machining process, ensuring the machining quality of products and protecting the blades.

Through the interference fit between the buffer 12 and the lightening hole 11, the buffer 12 is tightly pressed in the lightening hole 11, so that the buffer 12 and the lightening hole 11 are completely attached, the contact area between the buffer 12 and the lightening hole 11 is ensured, the vibration generated by the cutter bar main body 1 in the machining process is directly applied to the buffer 12, and the buffer 12 can more effectively generate blocking effect on the vibration mechanical wave.

In one embodiment, in order to better block the vibrational mechanical waves generated by the tool shank body 1 during machining, a plurality of lightening holes 11 are uniformly distributed in the axial direction of the tool shank body 1. Specifically, the plurality of lightening holes 11 are uniformly distributed along the length direction of the cutter bar body 1 to form a multi-section cutter bar body 1 between adjacent buffer members 12, and the multi-section cutter bar body can block the transmission of the vibrating mechanical wave along the extension direction of the cutter bar body 1 and reduce the intensity of the vibrating mechanical wave step by step until the intensity is completely counteracted.

Through this kind of mode of setting, can follow the self weight that furthest reduces cutter arbor main part 1 to under the prerequisite of guaranteeing cutter arbor main part 1 rigidity intensity, effectively reduced the transmission of vibrating mechanical wave.

The center line of each lightening hole 11 in the present embodiment intersects the axis of the holder body 1, so that the damper 12 mounted in the lightening hole 11 intersects the axis of the holder body 1. Referring to the weight-reducing vibration-proof tool bar shown in fig. 1, which is embodied in a laterally extending form, the vibrating mechanical waves are transmitted in the extending direction of the tool bar body 1 during machining. The central line of the buffer 12 installed in the lightening hole 11 is perpendicular to the central line of the cutter bar main body 1, and the central lines of the two are in an intersecting state. The transverse transmission of the vibration mechanical wave can be directly blocked by the buffer piece 12 vertically intersected with the central line of the cutter bar main body 1, and the vibration mechanical wave is absorbed, so that the vibration generated when the cutter bar main body 1 operates is fully released.

In order to facilitate the installation of the buffer 12, insertion surfaces 13 for installing the buffer 12 are arranged on two sides of the tool holder body 1, and the insertion surfaces 13 are symmetrically arranged with respect to the axis of the tool holder body 1. The insertion surfaces 13 are insertion planes formed by cutting two sides of the cutter bar main body 1, and the buffer parts 12 are convenient to assemble and disassemble in the lightening holes 11. Meanwhile, the insertion surface 13 reduces the self weight of the cutter bar main body 1 to a certain extent, and reduces the amplitude of vibration mechanical waves.

The inserting plane symmetrically arranged with the axis of the cutter bar main body 1 can enable the buffer member 12 to penetrate through the central line of the cutter bar main body 1 after installation, and the technical effect that the buffer member 12 blocks the transmission of vibration mechanical waves is guaranteed.

The lightening hole 11 in this embodiment includes a through hole formed on the insertion surface 13, two ends of the through hole respectively extend to the insertion surface 13, and in the installation process of the buffer 12, two top and bottom surfaces are respectively flush with two ends of the through hole, so that the buffer 12 is in a tight package, and the contact area between the two is further ensured.

In another embodiment, the through hole is a cylindrical through hole, the buffer member 12 includes a teflon cylinder with an outer shape matching the cylindrical through hole, and the buffer member 12 made of teflon material is filled into the through hole in an interference fit manner, so that a vibration-proof effect can be effectively formed, and the buffer member 12 can be conveniently detached.

The cylindrical buffer piece 12 made of polytetrafluoroethylene can reliably absorb the vibration mechanical wave formed by the cutter bar main body 1, and the wave intensity of the absorbed mechanical wave is offset in the lightening hole 11 through the elasticity of the cylindrical buffer piece, so that the working condition of the cutter bar in the operation process is effectively improved.

The weight-reducing vibration-proof cutter bar is connected to a processing machine through a mounting rod 2, a cutter bar main body 1 specifically comprises a mounting end and a cutting end, the mounting end of the cutter bar main body 1 is connected with the mounting rod 2, the other end of the mounting end, namely the cutting end, is provided with a tool containing groove 14 for mounting a cutting blade, and the processing of a deep cavity part is specifically completed through the cutting blade mounted at the cutting end.

The pocket 14 comprises two mounting groove surfaces 16 parallel to the plug-in surface 13, in particular in the form of side openings, and in order to further protect the blade during machining, the centre line of the lightening hole 11 is perpendicular to the mounting groove surfaces 16, by means of which the vibrations generated by the machining tool can be minimized and the vibration mechanical waves transmitted to the blade are minimized, so that maximum protection of the blade is given.

The mounting groove surface 16 is provided with a fixing hole 15 for mounting the cutting insert, the fixing hole 15 is a screw hole, and when mounting, a bolt is passed through both the through hole of the insert and the fixing hole 15, so that the insert is mounted in the pocket 14.

In order to facilitate the machining of the whole cutter bar, the cutter bar main body 1 and the mounting rod 2 are integrally formed, the mounting rod 2 is also provided with a mounting surface 21, and the mounting surface 21 is flush with the inserting surface 13 on the cutter bar main body 1. Through this kind of setting mode, made things convenient for the whole processing of cutter arbor, and integrated into one piece's installation pole 2 and cutter arbor main part 1 have guaranteed the holistic structural strength of cutter arbor.

It should be noted that, the plurality of lightening holes 11 arranged on the cutter bar body 1 at intervals do not affect the rigidity strength of the whole cutter bar, thereby achieving a good lightening effect and blocking the transmission path of the vibration mechanical wave generated by the processing machine.

Through installing the polytetrafluoroethylene cylinder wherein with lightening hole 11 with interference fit relation, can fully absorb vibration mechanical wave to the form through flexible dilution releases vibration mechanical wave's energy, makes the holistic vibration of cutter arbor reduce to minimumly, when guaranteeing product processingquality, has effectively protected the cutting tool bit.

In one preferred embodiment, the cutter bar adopts 45# steel after quenching and tempering treatment, the diameter of the cutter bar main body 1 is 60mm, and the total length is 500 mm. The depth of the tool containing groove 14 is 20mm, and the tool containing groove is used for clamping a cutting blade; the fixing holes 15 comprise three threaded holes, specifically M6 threaded holes; the diameter of each lightening hole 11 is 20mm, the lightening holes are uniformly distributed on the cutter bar main body 1 in a penetrating manner, and the center line of each lightening hole 11 passes through the center line of the cutter bar main body 1 and is vertical to the upper surface and the lower surface of the cutter accommodating groove 14; the diameter of each polytetrafluoroethylene cylinder is 20mm, and the polytetrafluoroethylene cylinders are tightly clamped and mounted in interference fit with the lightening holes 11; the mounting rod 2 has a length of 100mm and a diameter of 50 mm.

The weight-reducing anti-vibration cutter bar is used for machining the inner circle of a deep cavity part, the cutter bar is connected to a machine tool firstly, a proper inner circle blade is selected and installed on a cutter handle, the cutter handle is placed in the cutter accommodating groove 14, the cutter point is adjusted to be coincident with the rotation center of the part to be machined, and the cutter bar is fastened by three M6 bolts.

The diameter of the lightening hole 11 needs to be combined with the diameter of the cutter bar main body 1, so that a good lightening effect can be achieved, the overall structural strength of the cutter bar can be guaranteed, and the ratio of the diameter of the lightening hole 11 to the diameter of the cutter bar main body 1 is 1: 3.

The weight-reducing anti-vibration cutter bar in the embodiment can be used for processing a large-diameter deep cavity hole, the processing depth can reach 400mm, a good anti-vibration effect is achieved in the processing process, the surface processing precision is excellent, the problem of water ripples on the surface of a part processed by the traditional cutter bar is solved, and the surface roughness reaches more than Ra1.6; and meanwhile, the service life of the blade is prolonged by more than five times.

It should be noted that the number of the lightening holes 11 on the machining main body can be actually adjusted according to the type of the specific cutter bar, and meanwhile, the material of the buffer 12 can also be selected from other materials with certain elasticity, such as rubber, and will not be described herein again.

The utility model also provides a numerical control machine tool which comprises the weight-reducing vibration-proof cutter bar, so that the vibration transmitted to the cutter bar by the machine tool can be reduced in the product machining process, the cutter head is protected, the machining quality of the deep cavity part is guaranteed, and the smooth machining process is guaranteed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A weight-reducing vibration-proof cutter bar is characterized by comprising: the cutter bar comprises a cutter bar body, wherein a plurality of lightening holes are formed in the cutter bar body at intervals, a buffer piece is installed in each lightening hole, and the buffer pieces are in interference fit with the lightening holes and used for releasing vibration generated when the cutter bar body is machined.

2. The weight-reducing vibration-proof toolbar according to claim 1, wherein a plurality of the weight-reducing holes are uniformly arranged in an axial direction of the toolbar body, and a center line of each of the weight-reducing holes intersects with an axis of the toolbar body.

3. The weight-reducing vibration-proof cutter bar as claimed in claim 1, wherein insertion surfaces for mounting the buffer member are provided on both sides of the cutter bar body, and the insertion surfaces are symmetrically arranged with respect to an axis of the cutter bar body.

4. The weight-reducing vibration-proof cutter bar as claimed in claim 3, wherein the weight-reducing hole comprises a through hole formed in the insertion surface, and both ends of the through hole extend to the insertion surface respectively.

5. The weight-reducing vibration-proof cutter bar as claimed in claim 4, wherein the through hole is a cylindrical through hole, and the buffer member comprises a polytetrafluoroethylene cylinder having a shape matching the cylindrical through hole.

6. A weight-reducing vibration-proof cutter bar as claimed in claim 3, wherein a mounting bar is connected to one end of the cutter bar body, and a tool receiving groove for mounting a blade is provided on an end surface of the other end.

7. The weight-reducing vibration-proof cutter bar as claimed in claim 6, wherein the cutter accommodating groove comprises a mounting groove surface parallel to the insertion surface, and a center line of the weight-reducing hole is perpendicular to the mounting groove surface.

8. The weight-reducing vibration-proof cutter bar as claimed in claim 7, wherein fixing holes for mounting the inserts are provided on the mounting groove surfaces, the fixing holes are threaded holes, and the inserts are mounted on the tool receiving grooves by bolts.

9. The weight-reducing vibration-proof toolbar of claim 6 wherein the main body is integrally formed with the mounting bar, and the mounting bar is provided with a mounting surface flush with the insertion surface.

10. A numerically controlled machine tool comprising the weight-reduction vibration-proof tool bar according to any one of claims 1 to 9.