阅读说明：本技术 一种径向震动离心机 (A kind of radial vibration centrifuge ) 是由 张锦红 张新宇 马利峰 吴玉同 龚立靖 展益彬 于 2019-08-29 设计创作，主要内容包括：本发明公开了一种径向震动离心机。该离心机包括主动轮组和从动轮组,所述从动轮组包括托轮支座和震动装置,所述震动装置包括离合器、转轴、轴承Ⅰ、铜套和偏心组件,所述离合器与转轴柔性连接,在转轴的两端固定连接两组偏心组件,轴承Ⅰ安装在铜套内,铜套安装在托轮支座两侧支撑钢板的长圆孔内,所述长圆孔两个半圆的中心距为e,铜套的震动幅度不得超过该高度e。在离心铸造奥氏体不锈钢或镍基耐热钢铸钢管时,金属液冷却过程中,管模的径向向震动可打断铸态树枝晶,改善铸态晶粒,为后续的变形加工减轻压力。对于中低碳钢而言,有明显的减轻碳偏析的作用。(The invention discloses a kind of radial vibration centrifuges.The centrifuge includes active wheels and driven wheel group, the driven wheel group includes support roller support and shaking device, the shaking device includes clutch, shaft, bearing I, copper sheathing and offset assembly, the clutch and shaft are flexibly connected, two groups of offset assemblies are fixedly connected at the both ends of shaft, bearing I is mounted in copper sheathing, and copper sheathing is mounted in the slotted hole of support roller support steel plate supported on both sides, the center of two semicircles of slotted hole must not exceed the height e away from the vibration amplitude for e, copper sheathing.In centrifugal casting austenic stainless steel or nickel base heat resistant steel cast-steel pipe, in molten metal cooling procedure, the radial of pipe die can interrupt as cast condition dendrite to vibration, improve as-cast grain, ease off the pressure for subsequent deformation processing.For middle low carbon steel, play the role of significantly mitigating carbon segregation.)

1. a kind of radial vibration centrifuge, including active wheels (3) and driven wheel group (2), it is characterised in that: the driven wheel group It (2) include the radial vibration support roller for shaking pipe die, the vibration support roller includes support roller support (4), vibration driven wheel and vibration dress It sets, the shaking device includes clutch (5), shaft (6), bearing I (7), copper sheathing (8) and offset assembly (12), the clutch Device (5) and shaft (6) are flexibly connected, and are fixedly connected with two groups of offset assemblies (12), the bearing I at the both ends of the shaft (6) (7) it is mounted in copper sheathing (8), the copper sheathing (8) is mounted in the slotted hole of support roller support (4) steel plate supported on both sides (13), institute The center for stating two semicircles of slotted hole must not exceed e value away from the vibration amplitude for e, the copper sheathing (8).

2. a kind of radial vibration centrifuge according to claim 1, it is characterised in that: the rotation direction of the shaft (6) It is consistent with angular speed and vibration driven wheel.

3. a kind of radial vibration centrifuge according to claim 1, it is characterised in that: the offset assembly (12) is by two Eccentric block composition.

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 radial vibration 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: radial vibration centrifuge includes active wheels and driven wheel group, it is described from Driving wheel group includes the vibration support roller of radial vibration pipe die, and the vibration support roller includes support roller support, vibration driven wheel and vibration dress It sets, the shaking device includes clutch, shaft, bearing I, copper sheathing and offset assembly, and the clutch and shaft are flexibly connected, Two groups of offset assemblies are fixedly connected at the both ends of the shaft, the bearing I is mounted in copper sheathing, and the copper sheathing is mounted on support roller In the slotted hole of support steel plate supported on both sides, the centers of two semicircles of slotted hole is away from for e, and the vibration amplitude of the copper sheathing is not Obtaining is more than height e.

Further, the rotation direction of the shaft and angular speed are consistent with vibration driven wheel.

Further, the offset assembly can adjust shaking force by adjusting position.

The beneficial effects of the present invention are: in centrifugal casting austenic stainless steel or nickel base heat resistant steel cast-steel pipe, molten metal In cooling procedure, the radial of pipe die can interrupt as cast condition dendrite to vibration, improve as-cast grain, mitigate for subsequent deformation processing Pressure.For middle low carbon steel, play the role of significantly mitigating carbon segregation.

Detailed description of the invention

Fig. 1 is schematic structural view of the invention；

Fig. 2 is vibration riding wheel structure schematic diagram；

Fig. 3 is the Section A-A schematic diagram of Fig. 2；

Fig. 4 is the shockproof nickel-base alloy cast-steel pipe as-cast structure of pipe die；

Fig. 5 is that pipe die shakes nickel-base alloy cast-steel pipe as-cast structure；

Wherein: 1- pipe die, 2- driven wheel group, 3- active wheels, 4- support roller support, 5- clutch, 6- shaft, 7- bearing I, 8- copper Set, 9- bearing II, 10- shake wheel, I end cap of 11- bearing, 12- offset assembly, 13- supporting steel plate.

Specific embodiment

Attached drawing 1 is schematic structural view of the invention, and the radial centrifuge that shakes includes active wheels 3 and driven wheel group 2, driving wheel Group 3 includes a driving wheel for being driven by a motor rotation and a driven wheel, and driven wheel group 2 includes two driven wheels, wherein one A driven wheel has shaking device, and to shake support roller, which may make pipe die to generate the vibration of radial direction.Pipe die 1 Rolling band be placed on active wheels 3 and driven wheel group 2, active wheels 3 can drive pipe die high speed rotation, complete cast-steel pipe Centrifugal casting.

Attached drawing 2 is the structural schematic diagram for shaking support roller, which includes support roller support 4, vibration driven wheel and vibration Device, vibration driven wheel include bearing II 9 and vibration wheel 10, and bearing II 9 is mounted in vibration wheel 10, close by II end cap of bearing Envelope, the structure are consistent with other driven wheels.Shaking device includes clutch 5, shaft 6, bearing I 7, copper sheathing 8 and offset assembly 12, Consider from equipment safety angle, clutch 5 and motor power device are flexibly connected using belt, even if when pipe die stalls or occurs Accident can protect motor by belt slippage.Clutch 5 and shaft 6 are flexibly connected, when clutch 5 connects work, motor power Device can drive shaft 6 to rotate, and be fixedly connected with two groups of offset assemblies 12 at the both ends of shaft 6, every group of offset assembly is inclined by two Heart block composition can adjust eccentric shaking power by adjusting the angle between one group of two eccentric block.Bearing I 7 is mounted on copper sheathing 8 It is interior, it is sealed by I end cap 11 of bearing, inner hole interference connects shaft 6.Copper sheathing 8 is mounted on the steel plate 13 supported on both sides of support roller support 4 In slotted hole, as shown in Fig. 3, the centers of two semicircles of slotted hole is away from for e, that is, reserving height to copper sheathing 8 is the upper of e Lower activity surplus, the vibration amplitude of copper sheathing 8 must not exceed height e.

The present invention radially shakes centrifuge in use, the motor power device that starting is connect with 5 belt of clutch, band turn Axis 6 rotates, and the offset assembly 12 in shaft 6 generates eccentric shaking during rotation, and copper sheathing 8 and bearing I 7 is driven to support Vibration in the slotted hole of steel plate 13, while shaft 6 and vibration driven wheel shake together, the vibration for shaking driven wheel passes to pipe die 1, so that pipe die 1 generates the vibration of radial direction.

Bearing can be damaged due to shaking for a long time, the design and use of the vibration support roller meet claimed below: 1) copper sheathing 8 Lubricant is added before installing with bearing I 7, copper sheathing 8 can not only buffer the vibration of bearing I 7, but also direction of rotation and angular velocity of rotation Consistent with vibration wheel 10, the motor power device for driving shaft 6 to rotate need to design frequency modulation device, can be according to the rotation of vibration wheel 10 The rotation speed of speed adjust automatically shaft 6, the two keep angular speed consistent；3) polarization can produce after bearing I 7 shakes damage Raw sliding rotation is unlikely to cause serious equipment breakdown or casting accident；2) 6 power of shaft is adjustable, can be according to pipe die and cast steel The weight of pipe adjusts the angle of eccentric block in advance；4) clutch 5 and its motor power device are flexibly connected, if belt connects, Prevent equipment breakdown.

It is radial to shake centre spinning method the following steps are included: 1) pipe die baking, spray using above-mentioned radial vibration centrifuge Coating layer, installation pipe die both ends baffle；2) from one end of pipe die (i.e. casting end) casting of molten metal, when liquid metal filling to pipe die The other end (i.e. non-casting end) when, start motor power device, close clutch 5, shaft 6 rotates, direction of rotation and rotation Tarnsition velocity and vibration wheel 10 are consistent, and bearing II 9 is opposing stationary, and shaft 6 drives offset assembly 12 to rotate, and offset assembly 12 drives Vibration wheel 10 generates radial vibration, so that pipe die 1 generates radial vibration；3) pouring metal melt is complete, water-spraying control pipe die, when When molten metal concreting thickness reaches the half of centrifugal steel tube thickness, 5 being loosened the clutch, closing motor power device, shaft 6 is quiet Only, vibration wheel 10 continues to rotate, so that pipe die be kept to rotate under the support of bearing II 9.Shaking the time can be true by simulating Internal surface temperature when determining, or being centrifuged according to molten metal is determining, can also be empirically determined.4) molten metal all solidifies, and pushes away Pipe or tube drawing realize the separation of cast-steel pipe and pipe die.

If bearing II 9 shakes bad in pipe die rotary course, above-mentioned steps 3 are not executed), i.e., step 2 unanimously remains to gold Belong to liquid solidification, then executes step 4).If bearing I 7 is badly shaken, in the case that bearing II 9 can work normally, can stop shaking Dynamic device.If bearing I 7 and bearing II 9 shake bad simultaneously, the rotation of shaft 6 is kept, the sliding that bearing I 7 is generated with copper sheathing 8 rubs It wipes, can continue to keep pipe die rotation, complete the casting of cast-steel pipe.After ejector sleeve or tube drawing, bearing is replaced.So above structure is protected Spun cast pipe is demonstrate,proved in radially vibration, equipment breakdown caused by will not shaking badly because of bearing.

For austenitic stainless steel or nickel base heat resistant steel centrifugal casting steel pipe, after centrifugal casting molten metal, the diameter of pipe die As cast condition dendrite can be interrupted to vibration, improves as-cast structure grain size, is eased off the pressure for subsequent deformation processing.Attached drawing 4 is Certain shockproof nickel-base alloy cast-steel pipe as-cast structure of pipe die, cast steel tube thickness about 70mm, dendrite is substantially through the whole of cast-steel pipe A thickness, attached drawing 5 are the nickel-base alloy cast-steel pipe as-cast structure after pipe die radially shakes, cast steel tube thickness about 72mm, dendrite Length only has 10mm or so, is equiax crystal after remaining 60mm, and compared with attached drawing 4, dendrite length is greatly reduced, equiax crystal ratio Example, without being promoted to 80%, produces completely different effect, is well beyond expected from basic.

Radial direction vibration centrifuge and radial direction vibration centre spinning method can also be used for the casting such as other carbon steels or steel alloy Steel pipe's production, the phosphorus content for 16Mn or 40Cr etc are the cast-steel pipe of middle low-carbon, which equally has improvement, and it is brilliant The effect of granularity.In addition the study found that this radial vibration centrifuge and radial vibration centre spinning method, further improve cast steel The carbon segregation of pipe.It is ultralow carbon content since its carbon content is very low for austenitic stainless steel or nickel base heat resistant steel, Carbon segregation is unobvious.Following table is 16Mn or 40Cr centrifugal casting steel pipe carbon segregation data, the digital representation in table in the column of sample position It is successively sampled from inner surface exterior surface, is equally divided into 10 layers by thickness, successively do carbon analysis after sampling, the results show that radial No matter maximum value and difference are substantially reduced carbon segregation after vibration, and especially difference, reduction amplitude reach 50%, it is seen that the radial direction The carbon segregation of vibration centrifuge and centre spinning method centering low-carbon cast steel pipe has good inhibiting effect.