CN206104964U - Dark hole machining tool with ring floats - Google Patents

Abstract

The utility model belongs to the technical field of the machine -building spot facing work, concretely relates to dark hole machining tool with ring floats. Including tool bit, cutter arbor, float and encircle, unsteady ring cover is on the cutter arbor, and the external diameter that encircles that floats is less than the deep hole internal diameter, and the internal diameter of unsteady ring is greater than the external diameter of cutter arbor, and unsteady ring is located confined space, and it has the oil drain hole to process near the one end of tool bit at the ring that floats, has the cutting fluid to flow from the oil drain hole. The interstitial flow mistake between surface and the deep hole inner wall, another part cutting fluid from the interstitial flow mistake between unsteady intra -annular surface and the cutter arbor are encircled to partly cutting fluid from floating. Cutter arbor surface, the intra -annular surface of floating, the ring surface that floats are the smooth cylindrical face, or surface machining has the helicla flute outside cutter arbor surface, the intra -annular surface of floating, the ring that floats. Can also set up two or two above tilting pad on unsteady intra -annular surface. The utility model provides high dark hole machining tool's vibration resistance has prevented the incline of cutter arbor.

Description

Deep hole processing cutter with floating ring

Technical field

This utility model belongs to machine-building hole machined technical field, and in particular to the deep hole machining knife with floating ring Tool.

Background technology

Deep hole machining major way has：First, cutter rotation, workpiece feeding；Second, workpiece rotation, tool feeding；The Three, cutter and workpiece all rotate, while the feeding of cutter opposite piece.Drill bit is broadly divided into by chip removal mode：Bta deep hole drilling And outside chip removal deep hole drill.Deep hole machining ultimate principle sees Wang Jun《Modern Deep-Hole Drilling Technology》With Wang Shiqing chief editors'《Deep hole Process technology》.

It is difficult to observe working position and cutter situation during deep hole machining, knife bar length is big, is susceptible to deflection, causes Workpiece is scrapped, therefore deep hole machining is the difficult point of machining.Prevent and correct drill bit, boring cutter and knife bar deflection, it is ensured that processing Precision, is the key subjects for needing to solve, and is also remote unsolved worldwide technological puzzle.

Existing deep hole working machine, existing deep hole machining BTA cutter are one of important technical backgrounds of this utility model.

Presently used bta deep hole drilling drilling rod outside is cylinder.In big country etc. for deep hole tools and knife bar application Multinomial patent, including a kind of correction drilling rod, self correction deep hole processing system, it is a kind of with raised cutting element, it is a kind of tiltedly The rearmounted deep hole processing cutter of face structure, self correction deep hole processing cutter system, achieve good effect, but technology without only Border, can also continue to carry out new research.

There is rifling (rifle) in gun barrel, rifling is the rifling in gun barrel, bullet can be allowed to produce rotation, improve son Aloft stability after ejecting.

Floating collar bearing is one of effective ways of raising bearing vibration resistance and increase bearing load carrying capacity.It is recommended for Prevent from vibrating and reducing in the middle of the High speed Rotating Mechanical Devices of heating.

The content of the invention

The purpose of this utility model：Easily deviate ideal position this technical barrier for cutter during deep hole machining, Propose associated solutions, prevent and corrects the deflection of cutter, make cutter as far as possible in tram, raising deep hole machining into Product rate and machining accuracy.

This utility model has used for reference the design principle of sliding bearing.There is fluid between the endoporus and axle of hydrodynamic sliding bearing, There is fluid between machined hole wall and knife bar in deep hole machining, both have similarity.Former Soviet Union's Butterworth gram Lesinski (В o с к р e с e н с к и й, В. А .), and Jie Yakefu (Д ъ я к o в, В. И .) write works《Sliding bearing is calculated and set Meter》, Chen Jinbao and Bao Chuanfu translated above-mentioned works, published in National Defense Industry Press within 1986, middle figure classification number TH133.31, page totally 290 of the book, the superstar net of the book：http：//www.sslibrary.com/reader/jpath/ jpathreaderSsid=10706389＆d=81610d2e12ae9df1c9f4c289 b7eafe86

In the propositions of page 153, it is general to improve one of effective ways of bearing vibration resistance and increase bearing capacity to the works Floating ring is installed, the advantage of floating collar bearing is as follows in journal bearing：

1. vibration resistance is improved.

2. heating is reduced (due to square being directly proportional for frictional work and peripheral speed, so if floating ring is being equal to main shaft The half rotation of angular velocity, then gross calorific power is about little 1/2) than general cylindrical radial bearing

3. circumferentially uniform scratch, this guarantees that ring keeps cylindrical shape.

4. improve functional reliability (when floating ring side is blocked, opposite side works on).

5. the damping (due to there are double oil films) of main uranium radial displacement is increased under impact and varying load effect.

Above-mentioned operation principle can also be with further reference to documents below：Т а а н а к а М., Х o р и ю. Х а p а с т e р и с тикиустойчивости подшипников с плавВющей втулкой.-В книге：Проблем ы т р e н и я и с м а з к и .Tp.ASME.Cep и я .F.M.M и p, 1972, No.3,55-67.

This utility model adopts the following technical scheme that realization：

Deep hole processing cutter with floating ring, including cutter head 2, knife bar 3, floating ring 5, it is characterised in that cutter head 2 is located at In workpiece 1, cutter head is fixedly connected with knife bar, there is through hole inside knife bar, and floating ring is enclosed within knife bar, and the external diameter of floating ring is less than deep Hole internal diameter, the internal diameter of floating ring is more than the external diameter of knife bar 3, and floating ring is located in sealing space, oil of the cuttings liquid from oil delivering unit 4 Mouth 6 is flowed into, and through cutter head 2, is flowed out from knife bar interior bone.

The described deep hole processing cutter with floating ring, it is characterised in that process near one end of cutter head in floating ring 5 There is outage 7, have cutting fluid to flow out from outage 7.

The described deep hole processing cutter with floating ring, it is characterised in that a part of cutting fluid is from the outer surface of floating ring 5 Gap between inner walls of deep holes is flow through, and gap of another part cutting fluid between the inner surface of floating ring 5 and knife bar 3 is flow through.

This utility model has also used for reference tilting bush hydrodynamic sliding bearing principle.Good your the chief editor Higher Education Publishing House of Pu publishes The introduction of Machine Design (the 8th edition), liquid has wedge effect, and when liquid flows through wedge shape space, liquid internal will produce pressure Power, the pressure is higher than the pressure in non-wedge space.Within the bearing wedge-shaped oil film makes axle be stable at tram, in deep hole machining The power that middle utilization wedge-shaped oil film is produced makes knife bar be located at correct position.

Tilting-pad bearing can form wedge-shaped oil film and be widely used.Its operation principle is as follows：Bearing shell is made up of secter pat, axle Watt gradient can with axle journal position different adjust automatically, drawn with the elastic deformation for adapting to different loads, rotating speed and axle The deflection situation for rising.The appropriate gap between axle journal and bearing shell is kept, reliable friction, lubrication oil film can be set up.Even if During no-load running, axle and each bearing shell are also relative on certain eccentric position, that is, form several oil film wedges for having a bearing capacity, and these The oil film pressure produced in oil film wedge helps the stable operating of axle.

Thus with the deep hole processing cutter of floating ring, its inner surface of floating ring 5 has two or more tilting bush 9.

This utility model has also used for reference the internal structure of gun barrel and gun tube.Helicla flute 8 is designed with this programme, this design Thought with reference to the rifling (rifle) in gun barrel.

Rifling is rifling in gun barrel, allows bullet to produce rotation, improves aloft stability after bullet is projected.Its work Principle is as follows：The helical form chase cut out in bore makes bullet produce rotation when passing through bore, and in the outer flight of thorax top is formed The stablizing effect of spiral shell ceremony, bullet flight is remote, and trajectory is stable, and the torque of air drag can make bullet around the direction of its barycenter advance Flight.

Deep hole processing cutter with floating ring, its inner surface of floating ring 5 is the face of cylinder, and the outer surface of floating ring 5 is cylinder Face, uses for reference the principle of rifling, in the outer surface of knife bar 3 or floating ring inner surface or the processing of floating ring outer surface in this utility model There is helicla flute 8.Cuttings liquid flows through helicla flute, and because of the effect of a plurality of spiral fluted, cutting fluid is for the helical movement in flowing, rotation Liquid forms the stablizing effect of gyro ceremony, prevents cutter and cutter bar from deviateing ideal position.Spiral can also form dynamic pressure oil film.May be used also Using spiral effect is pumped into the gap fuel feeding between floating ring and knife bar.

The beneficial effects of the utility model：Firstth, this utility model refers to the design philosophy of floating collar bearing, in deep hole knife Floating ring is cased with bar, the vibration resistance of deep hole processing cutter is improve.Secondth, this utility model is floated according to wedge-shaped oil film principle The inner surface of rotating ring 5 has two or more tilting bush 9, forms wedge shape space, and flowing through the liquid of wedge shape space can produce pressure, Prevent the deflection of knife bar.3rd, knife bar outside or floating ring inner side or floating ring outside are machined with helicla flute, cuttings liquid stream For the helical movement when dynamic, the liquid of rotation forms the stablizing effect of gyro ceremony, prevents cutter and cutter bar from deviateing ideal position.

Description of the drawings

Fig. 1 is the simple deep hole processing cutter with floating ring, and Fig. 2 is the tilting bush formula deep hole machining knife with floating ring Tool, Fig. 3 is the spiral groove type deep hole processing cutter with floating ring.In figure：1- workpiece, 2- cutter heads, 3- knife bars, 4- oil delivering units, 5- floating rings, 6- hydraulic fluid ports, 7- outages, 8- helicla flutes, 9- tilting bush.

Specific embodiment

This utility model embodiment is described further below in conjunction with accompanying drawing, specific embodiment is not new to this practicality Type does any restriction.

Embodiment one：Knife bar outside and floating ring inner side and floating ring outside are all the face of cylinder.

Embodiment two：Knife bar outside or floating ring inner side or floating ring outside processing helicla flute.

Embodiment three：Floating ring inner side is installed by tilting bush.

Claims (5)

1. the deep hole processing cutter of floating ring, including cutter head (2), knife bar (3), floating ring (5), it is characterised in that cutter head are carried (2) in workpiece (1), cutter head is fixedly connected with knife bar, there is through hole inside knife bar, and floating ring is enclosed within knife bar, floating ring External diameter is less than deep hole internal diameter, and, more than the external diameter of knife bar (3), floating ring is located in sealing space for the internal diameter of floating ring, cuttings liquid from Hydraulic fluid port (6) on oil delivering unit (4) is flowed into, and through cutter head (2), is flowed out from knife bar interior bone.

2. the deep hole processing cutter with floating ring according to claim 1, it is characterised in that close in floating ring (5) One end of cutter head is machined with outage (7), has cutting fluid to flow out from outage (7).

3. the deep hole processing cutter with floating ring according to claim 1, it is characterised in that a part of cutting fluid is from floating Gap of the rotating ring (5) between outer surface and inner walls of deep holes is flow through, and another part cutting fluid is from floating ring (5) inner surface and knife bar (3) flow through in the gap between.

4. the deep hole processing cutter with floating ring according to claim 1, it is characterised in that floating ring (5) inner surface There are two or more tilting bush (9).

5. the deep hole processing cutter with floating ring according to claim 1, it is characterised in that floating ring (5) inner surface For the face of cylinder, floating ring (5) outer surface is the face of cylinder, in knife bar (3) outer surface or floating ring inner surface or floating ring outer surface It is machined with helicla flute (8).