阅读说明：本技术 一种轴向震动离心机 (A kind of axial vibrations centrifuge ) 是由 张新宇 张锦华 徐华 马利峰 刘立国 李栋 于 2019-08-29 设计创作，主要内容包括：本发明公开了一种轴向震动离心机。该离心机与中部带有震动凸缘的管模配合使用,在离心机的主动托轮组和从动托轮组之间设计有震动装置,该震动装置包括转轮装置和偏心装置,偏心装置包括偏心轮和动力机构,在偏心轮上加工有偏心槽。所述转轮装置包括两个转轮Ⅰ、钢板和转轮Ⅱ；两个转轮Ⅰ固定安装在钢板上,其间距与震动凸缘宽度相应；钢板只能在管模轴向上自由移动,转轮Ⅱ安装在钢板的下方,并与偏心槽配合。该离心机在奥氏体不锈钢或镍基耐热钢金属液冷却时,管模的轴向震动可以打断铸态树枝晶,减小铸态晶粒,为后续的变形加工减轻压力。(The invention discloses a kind of axial vibrations centrifuges.The centrifuge is used cooperatively with middle part with the pipe die of vibration flange, design has shaking device between the active roller station group and driven support roller group of centrifuge, the shaking device includes rotary wheel device and eccentric, and eccentric includes eccentric wheel and power mechanism, and eccentric grove is machined on eccentric wheel.The rotary wheel device includes two runners I, steel plate and runner II；Two runners I are fixedly mounted on the steel plate, and its spacing is corresponding to vibration flange width；Steel plate can only move freely in pipe die axial direction, and runner II is mounted on the lower section of steel plate, and cooperates with eccentric grove.The centrifuge austenitic stainless steel or nickel base heat resistant steel metal liquid cooling but when, the axial vibrations of pipe die can interrupt as cast condition dendrite, reduce as-cast grain, ease off the pressure for subsequent deformation processing.)

1. a kind of axial vibrations centrifuge, including active roller station group and driven support roller group, it is characterised in that: with middle part with vibration The pipe die of flange (9) is used cooperatively；The axial vibrations centrifuge further includes shaking device (3), and the shaking device (3) is located at Between active roller station group and driven support roller group, including rotary wheel device and eccentric；The eccentric include eccentric wheel (7) and Power mechanism with movable eccentric wheel (7) rotation, is machined with eccentric grove (8) on the eccentric wheel (7)；The rotary wheel device includes Two runners I (4), steel plate (5) and runner II (6)；Described two runners I (4) are fixedly mounted on steel plate (5), its spacing with It is corresponding to shake flange (9) width；The steel plate (5) can only move freely in pipe die axial direction, and the runner II (6) is mounted on The lower section of steel plate (5), and cooperate with eccentric grove (8).

2. a kind of axial vibrations centrifuge according to claim 1, it is characterised in that: the power mechanism is hydraulic horse It reaches or motor deceleration device.

Technical field

The present invention is applied to centrifugal casting field, and in particular to a kind of suitable for centrifugal casting austenic material cast-steel pipe Centrifuge.

Background technique

Centrifugal casting technique belongs to mature technique in China, no matter is centrifuged manufacture ductile iron pipe, Gray Cast Iron Tube and cast-steel pipe, no Only manufacturer is more, and yield is also big.But it for austenitic stainless steel seamless pipe or nickel base heat resistant seamless pipe, mostly uses Centrifugal casting steel pipe is rarely employed as raw material base in ingot casting, forging, hot extrusion, the process route for being cold rolled to pipe.In fact, Ovshinsky Body stainless steel seamless pipe or nickel base heat resistant seamless pipe can be hot extruded into extruded tube using spun cast pipe blank, then cold rolling Technique produces.The process route is short, saves manufacturing cost.Why this kind of seamless pipe is seldom using centrifugation blank as former Material base, first is that the rhythm of production of centrifuge is unable to satisfy smelting production requirement, second is that the grain size of centrifugal casting pipe is unable to satisfy It is required that.Since austenitic stainless steel and nickel base heat resistant steel are austenite structure from high temperature to room temperature, the grain size of the tissue without Method changes through Overheating Treatment, and the refinement of crystal grain only passes through deformation processing, such as squeezes, forging, cold rolling, so as to improve crystal grain Degree, improves its performance.Austenitic stainless steel and nickel base heat resistant steel seamless pipe are to obtain satisfied grain size, using cast-steel pipe conduct When raw material base, since the as-cast grain size of centrifugal steel blank is larger, needs repeatedly or aximal deformation value is processed, if can subtract The as-cast grain size of small cast-steel pipe raw material base improves grain size, can ease off the pressure for following process, saves production cost.

The proprietary material CN109014110A and CN206839085U having disclosed, give the vibration of vertical centrifugal casting Mechanism, these centrifugations for being suitable for batch small produce, and it is horizontal not to be suitable for several hundred kilograms or more heavy weight centrifugal casting steel pipes Centrifugal casting.

Summary of the invention

Technical problem solved by the present invention is providing a kind of axial vibrations centrifuge, cast in centrifugal casting austenic material When steel pipe, as-cast grain can be reduced.

The technical scheme adopted by the invention is that: the axial vibrations centrifuge and middle part cooperate with the pipe die of vibration flange It uses, including active roller station group and driven support roller group, and the shaking device between two groups of support roller groups.The shaking device Including rotary wheel device and eccentric, eccentric includes eccentric wheel and the power mechanism with movable eccentric wheel rotation, the engine Structure can be hydraulic motor or motor deceleration device, and eccentric grove is machined on eccentric wheel.The rotary wheel device includes two Runner I, steel plate and runner II；Two runners I are fixedly mounted on the steel plate, and its spacing is corresponding to the vibration width of flange；It is described Steel plate can only move freely on pipe die axial direction, and the runner II is mounted on the lower section of steel plate, and cooperates with eccentric grove.

The beneficial effects of the present invention are: being used together with the pipe die with vibration flange, in austenitic stainless steel or Ni-based When heat resisting steel molten metal is cooling, the axial vibrations of pipe die can interrupt as cast condition dendrite, reduce as-cast grain, be subsequent deformation Processing eases off the pressure.

Detailed description of the invention

Fig. 1 is schematic structural view of the invention；

Fig. 2 is shaking device structural schematic diagram；

Fig. 3 is the eccentric grove schematic diagram of eccentric wheel；

Fig. 4 is the shockproof austenite cast-steel pipe as-cast structure of pipe die；

Fig. 5 is that pipe die shakes austenite cast-steel pipe as-cast structure；

Wherein: 1- pipe die, 2- support roller group, 3- shaking device, 4- runner I, 5- steel plate, 6- runner II, 7- eccentric wheel, 8- are eccentric Slot, 9- shake flange.

Specific embodiment

Attached drawing 1 is the structural schematic diagram of axial vibrations centrifuge of the present invention, which includes two groups of support roller groups 2 and vibration Device 3.Support roller group and driven support roller group are moved based on two groups of support roller groups difference, the active roller station in active roller station group drives pipe die 1 Rotation, remaining driven support roller support pipe die 1 to rotate.Shaking device is mounted between two groups of support roller groups, and structure is shown in 2 institute of attached drawing Show, including rotary wheel device and eccentric, wherein rotary wheel device includes runner I 4, steel plate 5, runner II 6.Between two runners I 4 Distance and pipe die 1 vibration flange 9 equivalent width, pipe die 1 rotate when, vibration flange 9 drive runner I 4 rotate, runner I 4 It is fixedly mounted on steel plate 5, steel plate 5 can only move freely on the direction of pipe die axis, limit in above-below direction and pipe die The movement of left and right directions.Runner II 6 is mounted on the lower section of steel plate 5, and cooperates with the eccentric grove 8 on eccentric wheel 7.Eccentric packet The power mechanism for including eccentric wheel 7 and rotating with movable eccentric wheel 7, the power mechanism can be hydraulic motor or motor deceleration dress It sets, eccentric grove 8 is machined on eccentric wheel 7,8 shaped position of eccentric grove is shown in attached drawing 3.Eccentric grove 8 is matched with runner II 6, partially When heart wheel 7 rotates under the drive of power mechanism, eccentric grove 8 moves left and right the generation of runner II 6, and moving distance is bias Away from twice, runner II 6 moves left and right so that rotary wheel device drive pipe die 1 axis direction generate vibration, engine Structure velocity of rotation is faster, and the vibration frequency of pipe die 1 is higher, bigger to the extent of the destruction of dendrite, and it is better that grain size improves.

Using the pipe die of above-mentioned axial vibrations centrifuge and cooperation, axial vibrations centre spinning method the following steps are included: 1) pipe die baking, spray-on coating, installation pipe die both ends baffle；2) from one end of pipe die (i.e. casting end) casting of molten metal, work as gold When category liquid fills the other end (i.e. non-casting end) of the type to pipe die, starting shock device, pipe die generates axial vibrations；3) molten metal pours It has been infused that, water-spraying control pipe die, when molten metal concreting thickness reaches the half of centrifugal steel tube thickness, closed shaking device.Shake The dynamic shut-in time can be determining by internal surface temperature when simulating determination, or being centrifuged according to molten metal, can also be rule of thumb It determines.4) molten metal all solidifies, and ejector sleeve or tube drawing realize the separation of cast-steel pipe and pipe die.

Axial vibrations centrifuge of the present invention is used together with pipe die, in austenitic stainless steel or nickel base heat resistant steel metal liquid cooling When but, the axial vibrations of pipe die can interrupt as cast condition dendrite, improve as-cast structure grain size, mitigate for subsequent deformation processing Pressure.Attached drawing 4 is cast-steel pipe as-cast structure when certain nickel-base alloy pipe die is shockproof, cast steel thickness of pipe wall about 73mm, dendrite Length reaches 45mm or more, and attached drawing 5 is cast-steel pipe as-cast structure of the nickel-base alloy after pipe die axial vibrations, cast steel thickness of pipe wall About 75mm, dendrite length are 23mm or so, and compared with attached drawing 4, the dendrite length after pipe die axial vibrations shortens half, Grain size improves obvious.

The axial vibrations centrifuge can also be used for the production of other centrifugal casting steel pipes, for containing for 20Cr or 35CrMo etc Carbon amounts is the cast-steel pipe of middle low-carbon, and the centrifuge and axial vibrations casting method can also substantially improve its grain size.Result of study Display also acts as the effect for inhibiting carbon segregation for the cast-steel pipe of middle low-carbon.Due in austenitic stainless steel or nickel base heat resistant steel Carbon content is very low, is ultralow carbon content, and carbon segregation is unobvious.Following table is 20Cr and 35CrMo centrifugal casting steel pipe carbon segregation number According to the digital representation cast-steel pipe in table in the column of sample position is successively sampled from inner surface exterior surface, is equally divided into 12 by thickness Layer successively does carbon analysis after sampling, the results show that no matter maximum value and difference are substantially reduced carbon segregation after axial vibrations, especially It is difference, and reduction amplitude reaches 30%-40%, it is seen that the axial vibrations centrifuge and its casting method centering low-carbon cast steel pipe Carbon segregation has good inhibiting effect.