阅读说明：本技术 一种轻量化大直径镗刀及其加工方法 (Lightweight large-diameter boring cutter and machining method thereof ) 是由 张鹏飞 董云蒙 李志尧 张海斌 于 2021-07-07 设计创作，主要内容包括：本发明属于刀具加工技术领域,具体涉及一种轻量化大直径镗刀及其加工方法,该轻量化大直径镗刀包括镗刀本体,镗刀本体的一端与刀柄连接,镗刀本体具有用于焊接或装夹相应刀头的固定部,固定部具有减重空腔和/或减重孔,减重空腔和/或减重孔中设置有用于提高固定部强度的支撑部,通过设置减重空腔和/或减重孔使固定部形成薄壁结构,进而减轻了刀具的质量,使机床装夹刀具更加方便,提高工件加工的转速；通过设置支撑部解决现有传统刀具强度不足的问题、解决采用传统机加工方式制造非标刀体加工难度大、加工周期长的问题。(The invention belongs to the technical field of cutter processing, and particularly relates to a light-weight large-diameter boring cutter and a processing method thereof, wherein the light-weight large-diameter boring cutter comprises a boring cutter body, one end of the boring cutter body is connected with a cutter handle, the boring cutter body is provided with a fixing part for welding or clamping a corresponding cutter head, the fixing part is provided with a weight reducing cavity and/or a weight reducing hole, a supporting part for improving the strength of the fixing part is arranged in the weight reducing cavity and/or the weight reducing hole, the fixing part forms a thin-wall structure by arranging the weight reducing cavity and/or the weight reducing hole, so that the quality of the cutter is reduced, the cutter is more conveniently clamped by a machine tool, and the rotating speed of workpiece processing is improved; solve the not enough problem of current traditional cutter intensity, solve to adopt traditional machine tooling mode to make the problem that the nonstandard cutter body processing degree of difficulty is big, the cycle is long through setting up the supporting part.)

1. The light-weight large-diameter boring cutter is characterized by comprising a boring cutter body, one end of the boring cutter body is connected with a corresponding cutter handle, the boring cutter body is provided with a fixing part used for welding or clamping a corresponding cutter head, the fixing part is provided with a lightening cavity and/or lightening holes, and supporting parts used for improving the strength of the fixing part are arranged in the lightening cavity and/or the lightening holes.

2. The boring tool as claimed in claim 1, wherein the fixing portion is a shell structure having a weight-reduced cavity.

3. The boring tool as claimed in claim 1, wherein the support is a helical shape extending in the axial direction of the boring tool body and disposed inside the housing structure.

4. The boring tool as claimed in claim 2, wherein the fixing portion has an inner housing structure spaced from an inner housing wall of the fixing portion for improved structural stability.

5. The boring tool of claim 4, wherein the support is disposed inside the inner housing structure and/or at a gap between the inner housing and the housing.

6. The boring tool of claim 5, wherein the support includes a first helical structure disposed inside the inner housing, a second helical structure disposed at a gap between the inner housing and the housing.

7. The boring tool as claimed in any one of claims 1 to 6 wherein a first cutting head is provided at an end of the fixing portion opposite the respective shank.

8. The boring tool as claimed in any one of claims 1 to 6, wherein the fixing portion has a second bit and a third bit spaced apart from each other in the axial direction on the outer periphery thereof.

9. The boring tool according to any one of claims 1 to 6, wherein a coolant passage for guiding the coolant to the corresponding tool bit is provided in the fixing portion.

10. A method for processing a light-weight large-diameter boring cutter is characterized in that a boring cutter body is grafted on a cutter handle in a 3D printing mode, and the boring cutter head is the light-weight large-diameter boring cutter as claimed in any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of cutter machining, and particularly relates to a light-weight large-diameter boring cutter and a machining method thereof.

Background

The processing of large-diameter inner hole workpieces is one of the processing difficulties, the diameter of a cutter is large, and the stability of the cutter is poor. The designed cutter has larger diameter and larger mass, and the cutter is extremely inconvenient to clamp in the using process. In the process of processing a workpiece, the rotating speed of a machine tool is not easy to increase, so that the weight of the tool needs to be reduced as much as possible in the process of developing the tool. For example, in the prior art, patent document No. 20191061031184 provides a lightweight large-aperture rough boring tool, which includes a fixing member, a lateral adjustment member, a longitudinal adjustment member, and a cutting member, and is intended to reduce the weight by dividing the tool structure into modules.

On the other hand, patent No. 2012207129842 provides a deep hole combined type fine boring tool, which comprises a blade, a fine adjustment fine boring tool bit, a boring tool chemical engineering, a transition bridge plate and a tool shank system, wherein a lightening hole is arranged in the tool shank system, and the wall thickness of the tool body is 10 mm. The technical scheme provided by the patent document realizes the purpose of intensification by adopting a method of arranging the lightening holes, but the wall thickness of the cutter body has strict requirements when the lightening holes are arranged, and if the design is not proper, the cutter with a thin-wall structure has the defects of poor stability, lower strength of the cutter in the machining process and stress deformation of the cutter, and the machining precision of a workpiece is directly influenced. It can be seen that increasing the strength of the tool while reducing the weight of the tool becomes a difficult problem in designing large diameter tools.

Disclosure of Invention

The invention provides a light-weight large-diameter boring cutter and a machining method thereof, aiming at solving the defect that the strength of the cutter is improved while the weight of the cutter is reduced in the prior art.

The invention relates to a light-weight large-diameter boring cutter which adopts the following technical scheme:

the utility model provides a lightweight major diameter boring cutter, includes the boring cutter body, the one end and the corresponding handle of a knife of boring cutter body are connected, the boring cutter head body has the fixed part that is used for welding or the corresponding tool bit of clamping, the fixed part has subtracts heavy cavity and/or lightening hole, subtract and be provided with the supporting part that is used for improving fixed part intensity in heavy cavity and/or the lightening hole.

As an improvement, the fixing part is a shell structure with a weight-reducing cavity.

As a refinement, the support portion is a spiral that is disposed inside the housing structure and extends in the direction of the boring head body axis.

As a refinement, an inner housing structure is provided in the fixing portion for improving structural stability and spaced apart from an inner housing wall of the fixing portion.

As a refinement, the support is arranged inside the inner housing structure and/or at a gap between the inner housing and the housing.

As a refinement, the support portion includes a first helical structure provided inside the inner housing, a second helical structure provided at a gap between the inner housing and the housing.

As an improvement, one end of the fixing part, which is opposite to the corresponding knife handle, is provided with a first knife head.

As a modification, the periphery of the fixed part is provided with a second cutter head and a third cutter head which are arranged at intervals along the axial direction.

As a refinement, the fastening part is provided with a coolant channel for conducting coolant to the respective cutting head.

The invention has the beneficial effects that:

the invention relates to a light-weight large-diameter boring cutter, which comprises a boring cutter body, wherein one end of the boring cutter body is connected with a cutter handle, the boring cutter body is provided with a fixing part for welding or clamping a corresponding cutter head, the fixing part is provided with a lightening cavity and/or lightening holes, a supporting part for improving the strength of the fixing part is arranged in the lightening cavity and/or lightening holes, and the fixing part forms a thin-wall structure by arranging the lightening cavity and/or lightening holes, so that the quality of the cutter is lightened, the cutter is more conveniently clamped by a machine tool, and the rotating speed of workpiece processing is improved; solve the not enough problem of current traditional cutter intensity, solve to adopt traditional machine tooling mode to make the problem that the nonstandard cutter body processing degree of difficulty is big, the cycle is long through setting up the supporting part.

The method for processing the light-weight large-diameter boring cutter adopts the following technical scheme:

a method for machining a light-weight large-diameter boring cutter is characterized in that the boring cutter is grafted on a cutter handle in a 3D printing mode and comprises a boring cutter body, one end of the boring cutter body is connected with a corresponding cutter handle, the boring cutter body is provided with a fixing portion used for welding or clamping a corresponding cutter head, the fixing portion is provided with a weight reducing cavity and/or weight reducing holes, and supporting portions used for improving the strength of the fixing portion are arranged in the weight reducing cavity and/or the weight reducing holes.

As an improvement, the fixing part is a shell structure with a weight-reducing cavity.

As a modification, the supporting part is a spiral shape which is arranged inside the shell structure and extends along the axial direction of the boring cutter body.

As a refinement, an inner housing structure is provided in the fixing portion for improving structural stability and spaced apart from an inner housing wall of the fixing portion.

As a refinement, the support is arranged inside the inner housing structure and/or at a gap between the inner housing and the housing.

As a refinement, the support portion includes a first helical structure provided inside the inner housing, a second helical structure provided at a gap between the inner housing and the housing.

As an improvement, one end of the fixing part, which is opposite to the corresponding knife handle, is provided with a first knife head.

As a modification, the periphery of the fixed part is provided with a second cutter head and a third cutter head which are arranged at intervals along the axial direction.

As a refinement, the fastening part is provided with a coolant channel for conducting coolant to the respective cutting head.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an axial cross-sectional view of an embodiment of a lightweight large diameter boring tool of the present invention;

FIG. 2 is a radial cross-sectional view of an embodiment of a lightweight large diameter boring tool of the present invention;

reference numerals:

1. the boring cutter comprises a boring cutter body, 2, a cutter handle, 3, a weight reduction cavity, 4, a fixing part, 41, a connecting end, 42, an end cover, 43, a first cylinder, 44, a second spiral structure, 5, an inner shell, 51, a first spiral structure, 6, a third cutter head, 61, a first cooling channel, 7, a second cutter head, 71, a second cooling channel, 72, a primary cooling hole, 73, a secondary cooling hole, 8, a first cutter head, 81, a third cooling channel, 82 and a tertiary cooling hole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms than those herein described and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the invention relates to a light-weight large-diameter boring cutter, which comprises a boring cutter body 1, wherein one end of the boring cutter body 1 is connected with a corresponding cutter handle 2, the cutter handle 2 is connected with a rotating shaft of a lathe, the boring cutter body 1 is provided with a fixing part 4 for welding a corresponding cutter head, the fixing part 4 is provided with a weight reducing cavity 3, the weight reducing cavity 3 is of a closed structure, and a supporting part for improving the strength of the fixing part 4 is arranged in the weight reducing cavity 3.

The fixing portion 4 includes a connecting end 41 for connecting to the holder 2, an end cap 42 provided opposite to the connecting end 41, and a first cylinder 43 provided between the end cap 42 and the connecting end 41. I.e. the fixing part 4 is of a shell structure with a weight-reducing cavity 3. The fixing part 4 is provided with a first cutter head 8 at one end corresponding to the corresponding cutter handle 2, specifically, the first cutter head 8 is arranged on the end cover 42, and a second cutter head 7 and a third cutter head 6 are arranged on the outer wall of the first cylinder 43 at intervals along the axial direction; the first cutter head 8, the second cutter head 7 and the third cutter head 6 are sequentially arranged from the end cover 42 to the connecting end 41 in the axial direction and are symmetrically arranged; the lightweight major diameter boring cutter that this embodiment provided can but not only be limited to and be used for processing new forms of energy motor casing, and when combined type tool bit processing shoulder hole in this embodiment, but one shot forming reduces the tool changing time, has guaranteed the axiality of spot facing work.

The inner housing 5 is disposed inside the first cylinder 43 between the end cap 42 and the connecting end 41, and the structural stability of the tool can be further improved, and in this embodiment, the inner housing 5 is a cylindrical shape coaxial with the first cylinder 43. The inner housing 5 and the first cylinder 43 are spaced apart from each other, that is, a gap space having an annular radial cross section is provided between the inner housing 5 and the first cylinder 43.

In other embodiments of the present invention, the fixing portion 4 is provided with lightening holes or lightening grooves, and the supporting portion is a reinforcing rib provided on the hole wall of the lightening hole or the groove wall of the lightening groove.

The supporting part is a spiral shape which is arranged in the shell structure and extends along the axial direction of the boring cutter body 1, and the supporting part is used for reducing the stress concentration of the cutter. Specifically, the inner case includes a first screw 51 provided inside the inner case 5, a second screw 44 provided at a gap between the inner case 5 and the case; further, the first spiral structure 51 and the second spiral structure 44 each include a plurality of spiral reinforcing ribs extending spirally along the axis of the boring cutter body 1, and further, on a radial cross-sectional view of the boring cutter body 1, the first spiral structure 51 includes 4 spiral reinforcing ribs which are centrosymmetric around the central axis of the boring cutter body 1, one side of each spiral reinforcing rib converges on the central axis of the boring cutter body 1, and the other side is connected with the inner wall of the inner shell 5; the second spiral structure is 8 spiral reinforcing ribs which are symmetrical around the center axis of the boring cutter body 1, one side of each spiral reinforcing rib is connected with the outer wall of the inner shell 5, and the other side of each spiral reinforcing rib is connected with the inner wall of the first cylinder 43.

It should be noted that in other embodiments of the present invention, the supporting portion may be rectangular or wavy.

The invention provides a light-weight large-diameter boring cutter, which adopts a double-layer thin-wall structure consisting of a first cylinder 43 and an inner shell 5, wherein a spiral reinforcing rib is adopted between the two layers of thin walls, namely a second spiral structure 44, and the inner part of the inner shell 5 adopts a spiral support, namely a first spiral structure 51. The double-layer thin-wall structure reduces the quality of the cutter, so that the cutter can be clamped by a machine tool more conveniently, and the rotating speed of workpiece processing is improved; through setting up first helical structure 51, second helical structure 44 solve the not enough problem of current traditional cutter intensity, solve and adopt the problem that the processing degree of difficulty is big, the cycle is long of non-standard cutter body of traditional machining mode manufacturing. The spiral support outer cylinder structure building system greatly improves the lateral resistance of the outer cylinder through the arrangement of the spiral support, fully plays the structural role of the outer cylinder (namely a first cylinder), and is a high-efficiency novel structure system. The cutter has no stress concentration point, each part is evenly stressed, and the service life is greatly prolonged.

In other embodiments of the invention, the support may be provided only inside the inner housing 5 structure or in the interstitial space between the inner housing 5 and the housing.

The cooling liquid channel is disposed in the fixing portion 4, and specifically includes a first cooling channel 61 disposed in the connecting end 41, a second cooling channel 71 disposed in the first cylinder, and a third cooling channel 81 disposed in the connecting end 41, the second cooling channel 71 is communicated with a primary cooling hole 72 for cooling the third cutting head, a secondary cooling hole 73 for cooling the second cutting head, and the third cooling channel 81 is communicated with a tertiary cooling hole 82 for cooling the first cutting head. Further, the second cutter head 7 and the third cutter head 6 in the present embodiment are respectively provided at both ends of the first cylinder.

In other embodiments of the present invention, the boring tool body 1 may be manufactured by welding or assembled by means of a threaded connection.

The method for processing the light-weight large-diameter boring cutter adopts the following technical scheme:

a method for processing a light-weight large-diameter boring cutter is characterized in that the boring cutter is grafted on a cutter handle in a 3D printing mode, the cutter handle is a common steel part, and the method comprises the following steps: (1) manufacturing a three-dimensional model; (2) the topological structure optimization model is characterized in that the wall of the boring cutter body can adopt an internal lattice structure; (3) placing the cutter handle on a printing table of the 3D printing equipment; (4) printing the boring cutter body layer by layer; (5) performing quality inspection on the formed boring cutter; (6) and 3D, the boring cutter body after printing is subjected to grooving machining at the position of a welding or clamping cutter head. Specifically, the wall thickness of the inner shell and the wall thickness of the fixing part in the embodiment are both 5-8 mm; the cooling liquid channel is formed by printing, and the diameter of the cooling hole is 2 mm.

The structure of the three-dimensional model manufactured by the processing method provided by this embodiment is the same as the specific implementation manner in the above embodiment of the light-weight large-diameter boring cutter, and details are not repeated.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.