CN216729748U

CN216729748U - Flexible milling cutter and milling cutter head thereof

Info

Publication number: CN216729748U
Application number: CN202123160326.5U
Authority: CN
Inventors: 周鸿博; 郭锐
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-06-14
Anticipated expiration: 2031-12-06

Abstract

The utility model discloses a flexible milling cutter and milling cutter head thereof for engine internal pipeline is clean, wherein, flexible milling cutter includes: the milling head is fixedly connected with the flexible soft rod; the milling head can be sent to an internal expected position of an internal pipeline of the engine, and the power input end of the flexible soft rod inputs power and is transmitted to the milling head for rotary cleaning through the flexible soft rod; milling cutter grains are distributed on the outer wall of the milling cutter head; the flexible soft rod is provided with a first end and a second end along the length direction; the milling head is fixedly assembled on the flexible soft rod, and at least one end of the flexible soft rod is far away from the milling head to serve as a power input end.

Description

Flexible milling cutter and milling cutter head thereof

Technical Field

The utility model relates to an engine washs the field, especially relates to a novel flexible milling cutter and milling cutter head thereof.

Background

Engines of airplanes, rockets, tanks, ships, missiles, unmanned aerial vehicles and the like are all produced by casting process processing, but due to casting process defects and technical reasons, the phenomena of sand adhesion, casting tumors, crack splitting, loosening and the like often occur in pipelines inside the produced engines, and remnants caused by the process defects are also produced. Meanwhile, a large amount of residues and residues easily enter oil passages, water passages and other pipelines of the engine, the pipelines are easily blocked after being stacked, normal operation of equipment is affected, the service life of the equipment is greatly reduced, and great potential safety hazards are caused.

In order to avoid interference between a plurality of pipelines or between pipelines and equipment, the pipelines inside the engine are usually provided with a plurality of bent paths, the existing cleaning tools can not be thoroughly cleaned when the residues and the residues in the pipelines are cleaned, a large amount of manpower is wasted, and the working efficiency is low. In view of the above-mentioned cleaning problems, the application of flexible milling cutters is increasingly gaining attention. However, when the current flexible milling cutter is used, the flexible soft rod is often bent and deformed due to poor pushing force of the cutter handle, and is difficult to send to a target position. And the acting force carried by the cutter head is small, the overall strength of the cutter is low, and the cleaning efficiency is low.

SUMMERY OF THE UTILITY MODEL

Through the research discovery, the clean inefficiency of present tool bit causes unable clean the target in place because the less rotation even of swing radius of tool bit position, based on this research, an object of the utility model is to provide a flexible milling cutter and milling cutter head thereof to promote the effort that the tool bit bore, promote clean efficiency.

It is yet another object of the present invention to provide a flexible milling cutter and milling head therefor so as to feed the head into a desired position.

In order to achieve at least one of the above purposes, the present disclosure adopts the following technical solutions:

a flexible engine internal conduit clearing milling cutter tool comprising: the milling cutter comprises a milling cutter head and a flexible soft rod fixedly connected with the milling cutter head; milling cutter grains are distributed on the outer wall of the milling cutter head; the flexible soft rod is provided with a first end and a second end along the length direction; the milling head can be sent to an internal expected position of an internal pipeline of the engine, and the first end and/or the second end of the flexible soft rod is used as a power input end for inputting power and is transmitted to the milling head by the flexible soft rod; the milling head is provided with a connecting hole for accommodating the flexible soft rod with partial length, and the milling head is fixedly sleeved on the flexible soft rod through the connecting hole.

A flexible milling cutter comprising: the milling cutter comprises a milling cutter head and a flexible soft rod fixedly connected with the milling cutter head; the milling head can be sent to an internal expected position of an internal pipeline of the engine, and the power input end of the flexible soft rod inputs power and is transmitted to the milling head for rotary cleaning through the flexible soft rod;

milling cutter grains are distributed on the outer wall of the milling cutter head; the flexible soft rod is provided with a first end and a second end along the length direction; the milling head is fixedly assembled on the flexible soft rod, and at least one end of the flexible soft rod is far away from the milling head to serve as a power input end.

In a preferred embodiment, the milling head is welded to the end surface of the second end of the flexible soft rod.

In a preferred embodiment, the milling head is fixedly connected to the flexible soft rod by welding and/or gluing.

As a preferred embodiment, the flexible soft rod has a connecting section received in the connecting hole; the connecting section is connected with the hole wall of the connecting hole in an adhesive mode.

As a preferred embodiment, the outer wall of the connecting section is provided with a glue containing groove; the glue containing groove is formed by weaving; the flexible soft rod comprises a plurality of braided layers which are sleeved layer by layer; each woven layer is formed by spirally winding wires; the spiral extending directions of the spiral winding wires of the two adjacent braided layers are opposite (the winding directions of the two adjacent braided layers are opposite to each other); the outer wall of the braided layer at the outermost layer is distributed with spiral grooves which are constructed between the spiral winding wires and extend spirally; the part of the spiral groove in the connecting hole forms the glue containing groove.

In a preferred embodiment, the spiral direction of the spiral winding of the braided layer at the outermost layer is opposite to the rotation direction of the flexible soft rod.

In a preferred embodiment, the depth of the connecting hole is greater than 1/2 of the axial length of the milling head.

In a preferred embodiment, the milling head is fixedly mounted to the first end or the second end.

In a preferred embodiment, the connecting hole penetrates the milling head in the axial direction; the milling head is fixedly sleeved between the first end and the second end, and the first end and the second end are exposed out of the milling head; the first end and the second end may alternatively be power inputs.

In a preferred embodiment, the milling head is further provided with notch means recessed inwardly in its outer wall, the milling head being provided with the notch means so as to offset its centre of gravity from its central axis. Wherein, the breach structure does not set up milling cutter line.

In a preferred embodiment, the notch structure extends from one axial end of the milling head to the other axial end; the notch structure is radially and inwards communicated with the connecting hole from the outer wall of the milling cutter head, and the part of the outer wall of the flexible soft rod positioned in the connecting hole is exposed in the notch structure.

In a preferred embodiment, the notch structure has opposite peripheral side walls on two sides in the circumferential direction; the peripheral side wall is welded with the flexible soft rod exposed to the notch structure.

In a preferred embodiment, one end of the flexible soft rod is arranged without a handle and serves as a power input end.

As a preferred embodiment, the first end and/or the second end is/are detachably and fixedly provided with a tool handle; the knife handle is provided with a clamping section and a handle connecting section; the handle connecting section is provided with a jack for inserting one end of the flexible soft rod; the wall of the handle connecting section is also provided with a plurality of threaded holes for the fixing screws to penetrate through; the fixing screw is connected in the threaded hole to fix one end of the flexible soft rod in the handle connecting section.

In a preferred embodiment, the notch structure and the connecting hole are formed by one wire cutting.

Has the advantages that:

the milling cutter head of flexible milling cutter in the embodiment of this disclosure has the connecting hole that holds partial length flexible soft pole, the milling cutter head passes through the fixed cover of connecting hole is established flexible soft pole, borrow by the linkage segment that stretches into in the milling cutter head and cooperate with the connecting hole, promote the joint strength of milling cutter head and flexible soft pole, avoid the problem of welding point fracture and open welding.

The axial both ends of the flexible soft pole in this disclosed embodiment are power input end to the action power of two-way input milling cutter head avoids the driving force difference of the handle of a knife that unilateral transmission power leads to, often can take place bending deformation, and the effort that the milling cutter head bore is little, the pole scheduling problem that breaks. The penetrating flexible milling cutter can input driving force at any end of the milling cutter head or at two ends of the flexible soft rod simultaneously, and efficient completion of cleaning work is guaranteed.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 inventive exercise.

FIG. 1 is a schematic view of a flexible milling cutter tool for cleaning internal pipelines of an engine provided by an embodiment of the present disclosure;

FIG. 2 is a schematic view of a flexible milling cutter tool for cleaning internal pipelines of an engine according to another embodiment of the present disclosure;

FIG. 3 is a schematic view of a flexible milling cutter tool for cleaning internal pipes of an engine according to another embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a flexible milling cutter tool for cleaning internal engine pipes according to another embodiment of the present disclosure;

FIG. 5 is a schematic view of a flexible milling cutter tool for cleaning internal engine pipes according to another embodiment of the present disclosure;

FIG. 6 is a schematic view of the flexible rod structure of FIG. 1;

FIG. 7 is a schematic view of the shank construction of FIG. 1;

fig. 8 is a front view of a milling head provided by one embodiment of the present disclosure;

FIG. 9 is a bottom view of FIG. 8;

fig. 10 is a front view of a milling head provided by another embodiment of the present disclosure;

FIG. 11 is a top view of FIG. 10;

fig. 12 is a front view of a milling head provided by another embodiment of the present disclosure;

fig. 13 is a front view of a milling head provided by another embodiment of the present disclosure;

fig. 14 is a front view of a milling head provided by another embodiment of the present disclosure;

fig. 15 is a front view of a milling head provided by another embodiment of the present disclosure;

fig. 16 is a front view of a milling head provided by another embodiment of the present disclosure;

fig. 17 is a front view of a milling head provided by another embodiment of the present disclosure;

fig. 18 is a front view of a milling head provided by another embodiment of the present disclosure.

Description of reference numerals: 100. a milling head; 101. a first end; 102. a second end; 200. a flexible soft rod; 300. a knife handle; 130. connecting holes; 150. a platform; 210. a connecting section; 215. welding seams; 50. a notch structure; 51. a peripheral side wall; 211. a core bar; 212. weaving layer; 213. an outermost woven layer; 301. a shank coupling section; 302. a clamping section; 303. a threaded bore.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "disposed on" 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 be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are 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 herein in the description of the invention 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.

Referring to fig. 1, an embodiment of the present disclosure provides a milling cutter tool for flexibly cleaning an internal pipeline of an engine, where the milling cutter tool is a flexible milling cutter. Wherein, flexible milling cutter includes: the milling cutter head 100 and the flexible soft rod 200 fixedly connected with the milling cutter head 100. The milling head can be sent to an internal expected position of an internal pipeline of the engine, and the power input end of the flexible soft rod inputs power and is transmitted to the milling head for rotary cleaning through the flexible soft rod;

wherein, milling cutter lines are distributed on the outer wall of the milling cutter head 100. The milling head 100 is fixedly assembled on the flexible soft rod 200, and at least one end of the flexible soft rod 200 is far away from the milling head 100 to be used as a power input end. In one possible embodiment, the milling head 100 is welded to the end face of the second end 102 of the flexible shaft 200, with the first end 101 serving as the power input end. The first end 101 may be handleless and clamped directly to input power. Alternatively, the milling cutter holder 300 is fixed to the first end 101.

In this embodiment, the flexible rod 200 has a first end 101 and a second end 102 along its length. The milling head 100 can be fed to the desired location inside the internal engine piping. The first end 101 and/or the second end 102 of the flexible soft rod 200 is used as a power input end for inputting power, and the power is transmitted to the milling head 100 through the flexible soft rod 200. The milling head 100 has a connecting hole 130 for accommodating the flexible soft rod 200 with a partial length, and the milling head 100 is fixedly sleeved on the flexible soft rod 200 through the connecting hole 130.

In the present embodiment, as shown in fig. 1 to 5, the milling head 100 is fixedly connected to the flexible soft rod 200 by welding and/or gluing. The milling head 100 has a mounting portion such as the above-described coupling hole 130, a flexible soft rod 200 inserted through a partial length of the mounting portion, and fixedly coupled to the flexible soft rod 200. Wherein, there is the welding portion between milling cutter head 100 and the flexible soft pole 200, through welding with the fixed connection of the two.

To facilitate the welding of the milling head 100 and the flexible shaft 200, the milling head 100 has a connecting platform 150 at least one axial end, and is welded to the flexible shaft 200 through the connecting platform 150, and the welding portion includes a fillet weld connecting the milling head 100 and the flexible shaft 200. The welding can adopt argon arc welding or electric welding. Of course, in other embodiments, the milling head 100 and the flexible soft rod 200 are both made of metal, and the milling head 100 and the flexible soft rod 200 may be welded together by resistance welding.

In the bonded embodiment, the connecting section 210 of the flexible soft rod 200 is fixedly connected with the inner wall of the connecting hole 130 of the milling head 100 by gluing. And the milling head 100 is further fixedly connected with the flexible soft rod 200 through a welding part outside the connecting hole 130. In a possible embodiment, the flexible soft rod 200 and the milling head 100 can be fixedly connected only by gluing. Specifically, before the connection section 210 of the flexible soft rod 200 is inserted into the connection hole 130, glue is coated on the outer wall of the connection section 210 or the inner wall of the connection hole 130, the connection part is sent into the connection hole 130, and after the glue is cured, the flexible connection rod is fixedly connected with the milling cutter head 100.

The connecting hole 130 is a slot or through hole extending from one end of the milling head 100 to the other. The connection hole 130 is a linear hole. In the embodiment of fig. 8, the coupling bore 130 is of blind bore design and does not pass through the milling head 100. To ensure the connection strength of the milling head 100 and the flexible soft rod 200, the depth of the connection hole 130 is greater than 1/2 of the axial length of the milling head 100.

The milling head 100 can be mounted on the end of the flexible shaft 200, or can be fixedly sleeved on the flexible shaft 200 at a desired position between two ends, for example, the middle position of the flexible shaft 200. Specifically, in the embodiment shown in fig. 2 and 4, the milling head 100 is fixedly mounted at the first end 101 or the second end 102, and the other end of the flexible soft rod 200 away from the milling head 100 is used as a power input end.

In the embodiment shown in fig. 1, 3 and 5, the milling head 100 is a penetration milling head 100, and forms a penetration flexible milling cutter with a flexible soft rod 200. The milling head 100 is provided with a through hole (connecting hole 130) through which it passes. The coupling hole 130 axially penetrates the milling head 100. The milling head 100 is fixedly sleeved between the first end 101 and the second end 102, and the first end 101 and the second end 102 are exposed outside the milling head 100. The first end 101 and the second end 102 can be selectively used as power input ends and are in transmission connection with an output shaft of a power source such as a motor. The flexible soft rod 200 penetrates through the penetrating hole, the milling head 100 is fixedly sleeved on the flexible soft rod 200, and the first end 101 and the second end 102 are located outside the milling head 100.

When the flexible milling cutter is used for cutting and treating single-point dirt, due to the fact that the hole channel is bent, if the flexible milling cutter is fed from one side of a pipeline, force is insufficient, and the flexible milling cutter cannot or is difficult to directly reach a target cleaning point. The penetrating type flexible milling cutter can be used for enabling one end of the penetrating type flexible milling cutter to extend into a hole channel when the cutter handle 300 is not installed, the cutter handle 300 is installed after the milling cutter head 100 is overlapped with a target cleaning point, the cutter handle 300 is arranged at the cutter feeding end (the first end 101), the cutter handle 300 is arranged at the cutter feeding end (the second end 102), the two ends of the penetrating type flexible milling cutter rotate forwards at the same time, the milling cutter head 100 is driven to rotate and cut by double acting force, and the efficiency is higher and faster.

In the comparative example of welding the end surfaces of the milling cutter head 100 and the flexible soft rod 200, the milling cutter head 100 and the flexible cutter rod 200 (the flexible soft rod 200) are directly butt-welded, so that the problems of fracture and open welding of a welding point are easily caused when casting residues with high hardness are encountered and the cutter is rotated at a high speed or bent and fed all the time. The milling head 100 is provided with the connecting hole 130 for accommodating the flexible soft rod 200 with partial length, the milling head 100 is fixedly sleeved on the flexible soft rod 200 through the connecting hole 130, and the connecting section 210 extending into the milling head is matched with the connecting hole 130, so that the connecting strength of the milling head 100 and the flexible soft rod 200 is improved, and the problems of welding point fracture and open welding are avoided.

In the embodiment shown in fig. 1 and 5, the two axial ends of the flexible soft rod 200 are power input ends to bidirectionally input the motion power of the milling head 100, so as to avoid the problems that the pushing force of the tool holder 300 is poor due to unidirectional transmission force, bending deformation often occurs, the acting force borne by the milling head 100 is small, the rod is broken, and the like. The penetrating flexible milling cutter can input driving force at any end of the milling cutter head 100 or at both ends of the flexible soft rod 200 simultaneously, and the cleaning work can be efficiently finished.

The flexible soft rod 200 has a connection section 210 received in the connection hole 130. The connecting section 210 is adhesively connected to the hole wall of the connecting hole 130. In order to improve the connection strength between the milling head 100 and the flexible soft rod 200, a glue accommodating groove is formed in the outer wall of the connecting section 210. The glue containing groove is formed by weaving. The glue receiving groove extends spirally on the outer wall of the connection section 210.

Specifically, as shown in fig. 6, the flexible soft rod 200 is made of a metal woven material. The flexible soft rod 200 comprises a plurality of braided layers 212 which are sleeved layer by layer; each of the woven layers 212 is formed from a helically wound wire. The helical extension of the helical winding of adjacent two braided layers 212 is in opposite directions. The outer wall of the outermost braid layer 213 is distributed with spiral grooves constructed to extend helically between the spiral wound wires. The part of the spiral groove located in the connecting hole 130 forms the glue containing groove. The spiral extending direction of the spiral winding wire of the outermost braid 213 is opposite to the rotating direction of the flexible soft rod 200.

The outer wall of the proximal end of the flexible soft rod 200 and/or the inner wall of the connecting hole 130 are/is provided with glue containing grooves. The glue filling amount between the glue containing groove and the glue receiving groove is increased, so that the connection strength of the glue containing groove and the glue receiving groove is improved. The glue containing groove can be in various forms, such as a discretely distributed dot-shaped groove, a long groove structure or a spiral groove. By way of illustrative example, the glue containing groove may be a plurality of linear grooves extending in the axial direction, and the plurality of linear grooves are arranged in parallel in the circumferential direction.

The plurality of braided layers 212 of the flexible soft rod 200 are in a layer-by-layer sleeved relationship, and the braided layers 212 are spirally braided. Wherein, the spiral directions of two adjacent braided layers 212 are opposite. The multi-layer braided structure is a generally helical twisted structure with the opposite hand of the inner and outer adjacent braided layers 212.

By providing the flexible soft rod 200 having the weaving and twisting structure in which the weaving directions of the inner and outer adjacent two woven layers 212 are opposite to each other, a spiral groove or protrusion is formed on the outer surface of the flexible soft rod 200, and the spiral direction of the spiral groove or the spiral protrusion is opposite to the rotation direction of the flexible soft rod 200, so that a pump effect is formed, and power is reliably transmitted to the milling head 100. The braid 212 is typically helically braided from a single strand of material that is generally circular in cross-section so as to naturally form helical ridges or grooves in the braid surface. Wherein the protrusions are the outer contours of a single strand of material and the grooves are formed between the woven material (spiral wound wires).

Therefore, in order to achieve the above-mentioned spiral structure formed on the outer wall of the flexible soft rod 200, in the case that the flexible soft rod 200 adopts the spiral braiding configuration, it is only necessary to make the spiral direction of the braided layer 212 at the outermost layer opposite to the rotation direction of the flexible soft rod 200.

The first end 101 and/or the second end 102 are detachably and fixedly provided with a tool shank 300. The tool shank 300 has a clamping section 302 and a shank coupling section 301. The shank coupling segment 301 has a receptacle for inserting one end of the flexible soft rod 200. The wall of the handle connecting section 301 is also provided with a plurality of threaded holes 303 through which fixing screws are inserted. The fixing screw is connected in the threaded hole 303 to fix one end of the flexible soft rod 200 in the shank connecting section 301.

As shown in fig. 1 and 7, a milling cutter handle 300 is further fixed to at least one end of the flexible soft rod 200. The milling cutter handle 300 is fixed at one end of the flexible soft rod 200 by welding or screw fixing or extrusion fixing, or even adhesive fixing. As shown in fig. 7, milling cutter shank 300 has a shank coupling section 301 and a clamping section 302. Wherein the shank coupling segment 301 has a coupling hole 130. The connection hole 130 extends from an end face of the shank attachment section 301 toward the clamping section 302. The shank coupling section 301 has an outer diameter greater than the outer diameter of the clamping section 302. Further, the milling cutter holder 300 is configured as a two-step cylindrical shank. The shank coupling segment 301 has a plurality of threaded holes 303 in its outer wall for receiving fastening screws. Screwing a plurality of fastening screw holes into the threaded holes 303 to be inserted into the flexible soft rod 200 for compression fixation. The plurality of threaded holes 303 are evenly distributed in the circumferential direction.

As shown in FIG. 7, the wall of the shank attachment section 301 is provided with two opposing sets of threaded holes 303, each set of threaded holes 303 having two threaded holes 303. The milling cutter handle 300 can be detachably connected by matching the fastening screws with the threaded holes 303, and when the milling cutter head 100, the flexible soft rod 200 and even the milling cutter handle 300 are damaged or reach the service life, the flexible soft rod 200 and the milling cutter handle 300 are detached and separated, so that the components are repeatedly used.

Of course, in some embodiments, as shown in fig. 3, the end of the flexible soft rod 200 is not attached to the milling cutter handle 300.

As described above, the flexible soft rod 200 includes a plurality of braided layers 212 that are sleeved layer by layer. Each of the woven layers 212 is formed from a helically wound wire. The adjacent two braided layers 212 have opposite handedness (direction of helical extension of the helically wound wire). Specifically, as shown in fig. 6, the flexible soft rod 200 includes 5 layers of the braided layer 212, wherein the innermost layer is the core rod 211. The core bar 211 is formed by two helically wound wires. The core rod 211 is spirally wound outward layer by layer to form the flexible soft rod 200. Specifically, the flexible soft rod 200 is composed of a metal wire, a natural fiber wire or a chemical fiber wire wound in multiple layers. That is, on the two adjacent braided layers 212, the first braided wire layer is wound in the forward direction, the second braided wire layer is wound in the reverse direction, and the braided wires are wrapped layer by layer and are wound, so as to expand to the desired diameter of the flexible soft rod 200 required by the design.

The flexible soft rod 200 is provided with a spiral structure on the outer wall thereof. The helical structure, such as a helical groove or a helical protrusion or a helical winding, is formed by braiding. The spiral direction of the spiral structure is opposite to the rotation direction of the flexible soft rod 200. Specifically, the helical structure is a left-handed thread in the case where the flexible soft rod 200 is rotated clockwise, or a right-handed thread in the case where the flexible soft rod 200 is rotated counterclockwise, as viewed from the proximal end toward the distal end. The spiral structure is a spiral groove or a spiral protrusion.

Thus, the spiral direction of the innermost and outermost woven layers 212 is the same. In the above-mentioned case that the spiral directions of the adjacent braided layers 212 are opposite, the flexible soft rod 200 should include an odd number of braided layers 212 greater than 1, for example, 3 or 5 layers.

Further, since the flexible soft rod 200 needs to transmit torque to the milling head 100, the outermost spiral braid 213 tends to be screwed due to torque action during rotation by the structural design that the spiral direction of the outermost braid 213 is opposite to the rotation direction of the flexible soft rod 200, so as to avoid the loosening of the outermost braid 212.

Thus, during rotation, the braided layer 212 having a helical direction (the direction in which the helical wire extends) opposite to the direction in which the flexible soft rod 200 rotates tends to be smaller and tighter in diameter, and the shape can be stably maintained, more stably transmitting power to the milling head 100. If all the spiral braid 212 of the flexible soft rod 200 is rotated in the opposite direction to the flexible soft rod 200, the diameter of the flexible soft rod 200 cannot be stably maintained as the working time is extended.

As described above, there are two adjacent braided layers 212 in the flexible soft rod 200 that have opposite helical directions. That is, the flexible soft rod 200 includes the braid 212 having the same spiral direction as the rotation direction thereof, and the braid 212 tends to increase in diameter or to be loose due to the torque during the rotation.

Then, the braid 212 having a helical direction opposite to the rotational direction of the flexible soft rod 200 applies an inward compression force to the inner braid 212, and the braid 212 having the helical direction same as the rotational direction of the flexible soft rod 200 applies an outward expansion force to the outer braid 212. Thereby, the diameter variation or force action of the adjacent braid 212 is at least partially compensated for, thereby stably maintaining the diameter of the flexible rod 200. The stable maintenance of the diameter of the flexible soft rod 200 is advantageous for the shape stability thereof when cleaning the engine passage, thereby more stably transmitting power to the milling head 100.

In this embodiment, the flexible soft rod 200 is formed by winding a wire coil of 0.02mm to 1.0mm in a spiral manner. The diameter of the flexible soft rod 200 is 2mm-20 mm. The milling head 100 may be sized from 2mm to 40mm by selecting a suitable flexible milling cutter depending on the diameter of the bore being machined (engine internal pipe) and the size of the cast in the bore. The depth of the cutting lines (milling cutting lines) on the milling head 100 is 0.1mm-5 mm.

Milling cutter grains are distributed on the milling cutter head 100. The milling flutes extend helically or curvilinearly or arcuately from one axial end of the milling head 100 to the other. As shown in fig. 1 to 5 and 8 to 11, the milling head 100 has a spherical structure. In other embodiments, milling head 100 may also be a turret-type configuration as shown in fig. 12, or a trapezoidal configuration as shown in fig. 15, an oval configuration as shown in fig. 16, a fine cone-shaped configuration as shown in fig. 17, a fine cone round head configuration as shown in fig. 18, a (round) cylindrical configuration as shown in fig. 13, or a pointed bullet shape, a round (blunt) bullet shape as shown in fig. 14, or the like.

In the embodiment shown in fig. 2 to 5, the milling head 100 is an eccentric milling head 100, and the eccentric milling head 100 can solve the problems of sand sticking, beading, crack splitting, loosening and the like on the inner wall of the pipeline of the engine produced by the casting process. The eccentric milling head 100 rotates eccentrically during operation, has higher degree of freedom and large processing range, thereby being very effective in cleaning the inner wall of the pipeline and solving the problem of pipeline blockage in the engine by time and labor saving. The eccentric milling head 100 can be fixedly connected to one end of the flexible soft rod 200, or the flexible soft rod 200 can be fixedly connected between two ends of the flexible soft rod 200.

The milling head 100 is further provided with a notch arrangement 50 recessed inwardly in its outer wall. The milling head 100 is provided with the notch arrangement 50 to offset its center of gravity from its central axis. The gap structure 50 is not provided with milling cutter marks. Specifically, milling head 100 has a notch configuration 50. The notch feature 50 extends from one axial end of the milling head 100 to the other.

In the embodiment of milling head 100 of spherical configuration shown in fig. 1, milling head 100 is formed with a longitudinal cross-section rotated 180 degrees about a central axis, or alternatively, a half longitudinal cross-section (longitudinal half-section) rotated 360 degrees about a central axis. In the embodiment shown in fig. 2 to 5, the central angle of the notch structure 50 is smaller than 180 degrees. Specifically, the central angle of (the cross section of) the notch structure 50 is smaller than 150 degrees. Further, the corresponding central angle is less than 100 degrees. Still more closely, the central angle that the cross-section corresponds to is 90 degrees. The notch feature 50 has a cross-section perpendicular to the central axis of the milling head 100.

The notch feature 50 extends from one axial end of the milling head 100 to the other axial end. The notch feature 50 extends radially inward from the outer wall of the milling head 100 into the attachment bore 130. A portion of the outer wall of the flexible soft rod 200 located within the connection hole 130 is exposed in the notch structure 50.

The notch structure 50 has opposing peripheral side walls 51 on both sides in the circumferential direction. The peripheral side wall 51 is a substantially semicircular side wall. The peripheral side wall 51 is welded to the flexible soft rod 200 exposed to the notch structure 50. The radial inner side edge of the peripheral side wall 51 is welded with the flexible soft rod 200, and a welding seam 215 for connecting the two is arranged, so that the connecting strength of the milling head 100 and the flexible soft rod 200 is improved. The two axial ends of the milling head 100 are respectively welded with the flexible soft rod 200 to form an end welding part, the peripheral sidewall 51 is welded with the flexible soft rod 200 exposed to the notch structure 50 to form a face welding part, and the end welding part and the face welding part form a continuous welding seam 215.

In the embodiment of milling head 100 having a spherical configuration and providing notch feature 50 (eccentric milling head 100), milling head 100 is formed with a longitudinal half-section rotated 270 degrees about the central axis. The flexible soft rod 200 cannot be removed from the connecting hole 130 in the milling head 100, and the opening of the connecting hole 130 communicated with the notch structure 50 provides a further welding position for the connection of the flexible soft rod 200 and the milling head 100, so that the length of the welding line 215 is prolonged, the connection strength of the flexible soft rod 200 and the milling head 100 is further improved, and the milling head 100 is not easy to fall off in the operation process.

In this embodiment, the notch feature 50 is a recessed feature in which the outer surface of the milling head 100 is recessed. The notch feature 50 is a partially recessed feature of the milling head 100. Further, the notch structure 50 is recessed inwards from the outer surface to the connecting hole 130, and part of the outer surface of the flexible soft rod 200 is exposed in the notch structure 50, so that a further welding position can be provided for the connection of the flexible soft rod 200 and the milling head 100, the length of the welding seam 215 is prolonged, the connection strength of the flexible soft rod 200 and the milling head 100 is further improved, and the milling head 100 is not easy to fall off in the operation process.

Through being equipped with breach structure 50, the off-centre of gravity of milling cutter head 100 the central axis, and then can promote the swing range when rotatory, promote clean efficiency, avoid the less rotation even of swing radius and can't clean the problem that targets in place.

The eccentric milling head 100 can solve the problem that the area of a local welding point of a hole channel of the milling head 100 is difficult to clean, and the eccentric milling head 100 and the flexible soft rod 200 are coaxially arranged, so that the swinging amplitude of the position is small, the machining range is narrow, and even the eccentric milling head rotates, the dirt of a channel is difficult to clean, and the cleaning efficiency is low.

In manufacturing the eccentric milling head 100, the full-form milling head 100 is mounted on a wire cutting device fixture, 1/2 balls, 1/3 balls or 1/4 balls are cut out by wire cutting machining, and then the connecting hole 130 is machined at the central axis position of the milling head 100 to facilitate mounting of the matching flexible soft rod 200. The notch structure 50 and the connecting hole 130 are formed by one wire cutting. The shape of the notch 50 is not limited to a partial sphere structure, but may be other concave structures, such as an irregular groove, or 1/8 sphere structure, etc.

In the embodiment in which the milling head 100 is mounted on one end of the flexible soft rod 200, the milling head 100 transmits cleaning power to one side of the flexible soft rod 200, but when the milling cutter is fed into the engine, the flexible soft rod 200 has a poor driving force, so that the milling cutter is more likely to be bent and deformed and is less likely to be fed to a target position. The two ends of the flexible soft rod 200 are exposed outside the milling head 100 and penetrate out of the milling head 100, so that when the flexible milling cutter is fed in, one end of the flexible soft rod 200 can be fed into the pipeline until the flexible milling cutter penetrates out, the flexible milling cutter is pulled through the penetrated end and is pushed inwards into the milling cutter through the other end, and the flexible soft rod and the milling cutter act together in two directions towards the milling head 100 to quickly reach a target position in an engine pipeline.

Moreover, when the flexible milling cutter with unidirectional transmission is cleaned, the power input end of the flexible soft rod 200 and the milling cutter head 100 are easy to bend and deform, and power is difficult to transmit to the milling cutter head 100 or even breaks the rod, power is input and transmitted in two directions, the driving force input by the cutter handle 300 can be improved, the cleaning power of the milling cutter head 100 is increased, the power borne by the milling cutter head 100 is larger, the cleaning effect of the milling cutter head 100 is improved, and the efficient completion of cleaning work is ensured.

Both ends of the flexible soft rod 200 can be selectively used as power input ends. One or both ends of the flexible soft rod 200 may be selected for gripping, such as by a motor or a powered or pneumatic tool, that is more suitable for inputting power (e.g., closer to the milling head 100 or less interference from the surroundings) when the milling head 100 is in a target position within the channel.

In order to fixedly connect the milling head 100 and the flexible soft rod 200, the milling head 100 with a complete shape is fixed on an electric pulse or electric spark machine fixture, a connecting hole 130 (blind hole or through hole) with the depth exceeding a hemisphere diameter is machined at one axial end (platform 150 part) of the milling head 100 from outside to inside by using electric pulse or electric spark, and then one end of the flexible soft rod 200 is inserted into the connecting hole 130 for bonding and/or welding.

When the connection hole 130 is machined, the axial direction of the milling head 100 is clamped and fixed in a manner parallel to the vertical direction, the platform 150 of the milling head 100 faces upward, and then the connection hole 130 is formed by electrically pulsing or electrically sparking from top to bottom through the hole to the target depth.

When the connecting hole 130, through which the milling head 100 axially penetrates, is machined, the connecting hole 130 may be machined by wire cutting. Cutting a slot on one side of milling head 100, cutting radially inward into a predetermined position in the slot, rotating milling head 100 one revolution or rotating the cutting wire one revolution until the slot position is reached again, and removing milling head 100 at the slot position.

In the wire cutting process, a moving metal wire (e.g., a molybdenum wire, a copper wire, or an alloy wire) is used as a wire electrode, and pulse spark discharge is performed between the wire electrode and the milling head 100 made of a metal material to generate high temperature so as to melt or vaporize the metal and form a cutting slit, thereby cutting the milling head 100 having a desired structure. Accordingly, the notch feature 50 is also cut from a portion of the milling head 100 using wire cutting to form the target shaped notch feature 50.

After the flexible milling cutter is manufactured, the flexible milling cutter can be installed on an air gun, an electric drill or a manual rotating device to clean the interior of an engine pore channel. The cleaning work may be performed as follows:

1) firstly, selecting a proper flexible milling cutter according to the diameter of the oil way to be cleaned and the position of the defect.

2) The flexible milling cutter is fixed on a pneumatic drill chuck or other electric tools, the electric tools need to select a type which is easy to control by a single hand, and if the flexible milling cutter is longer, the flexible milling cutter can be operated by firstly plugging the flexible milling cutter into an oil path to a processing position. When in operation, an operator needs to wear protective gloves to prevent injury in the rotating process.

3) After the position of the flexible milling cutter is fixed, the flexible milling cutter rotates slowly and rotates slowly from slow to fast for cutting, the flexible milling cutter is withdrawn from a pipeline after obstacles are thoroughly removed, an industrial endoscope is used for checking whether secondary processing is needed or not, and the flexible milling cutter can be withdrawn if the flexible milling cutter is determined to be processed completely.

Any numerical value recited herein includes all values from the lower value to the upper value, in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of the subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed inventive subject matter.

Claims

1. A flexible milling cutter, comprising: the milling cutter comprises a milling cutter head and a flexible soft rod fixedly connected with the milling cutter head; the milling head can be sent to an internal expected position of an internal pipeline of the engine, and the power input end of the flexible soft rod inputs power and is transmitted to the milling head for rotary cleaning through the flexible soft rod;

2. The flexible milling cutter according to claim 1, wherein the milling head is welded to an end face of the second end of the flexible soft rod.

3. The flexible milling cutter according to claim 1, wherein the milling head has a coupling hole for receiving a flexible soft rod of a partial length, the milling head being fixedly secured to the flexible soft rod through the coupling hole; the milling head is fixedly connected with the flexible soft rod through welding and/or gluing; the flexible soft rod is provided with a connecting section accommodated in the connecting hole; the outer wall of the connecting section is provided with a glue containing groove; the connecting section is connected with the hole wall of the connecting hole in an adhesive mode.

4. The flexible milling cutter according to claim 3, wherein the flexible soft rod is a multi-layer braided structure that is nested layer by layer; the winding directions of the adjacent two layers of the braided structures extend oppositely; the depth of the attachment aperture is greater than 1/2 of the axial length of the milling head.

5. The flexible milling cutter according to claim 3, wherein the coupling bore axially extends through the milling head; the milling head is fixedly sleeved between the first end and the second end, and the first end and the second end are exposed out of the milling head; the first end and the second end may alternatively be power inputs.

6. The flexible milling cutter according to claim 3, wherein the milling head is further provided with notch structure recessed radially inwardly in its outer wall, the milling head being offset in its center of gravity from its central axis by the provision of the notch structure.

7. The flexible milling cutter according to claim 6, wherein the milling head is spherically configured; the notch structure extends from one axial end of the milling head to the other axial end, the notch structure is communicated with the connecting hole from the outer wall of the milling head radially inwards, and part of the outer wall of the flexible soft rod in the connecting hole is exposed in the notch structure.

8. The flexible milling cutter according to claim 6, wherein the notch structure has opposing peripheral side walls on both circumferential sides; the peripheral side wall is welded with the outer wall of the flexible soft rod exposed to the notch structure.

9. The flexible milling cutter according to claim 1, wherein one end of the flexible soft rod is shank-less and serves as a power input end; alternatively, the first and second electrodes may be,

the power input end is detachably and fixedly provided with a cutter handle; the knife handle is provided with a clamping section and a handle connecting section; the handle connecting section is provided with a jack for inserting one end of the flexible soft rod; the wall of the handle connecting section is also provided with a plurality of threaded holes for the fixing screws to penetrate through; the fixing screw is connected in the threaded hole to fix one end of the flexible soft rod in the handle connecting section.

10. The milling head for the flexible milling cutter is characterized in that the milling head can be sent to a desired position inside an internal pipeline of an engine by virtue of a flexible soft rod, and is rotationally cleaned by virtue of power transmitted by the flexible soft rod; milling cutter grains are distributed on the outer wall of the milling cutter head; the milling head is also provided with a notch structure which is inwards sunken in the radial direction on the outer wall of the milling head, and the center of gravity of the milling head deviates from the central axis of the milling head through the notch structure.