CN102207439B

CN102207439B - Experimental equipment for simulating friction and wear of roll and rolled piece in rolling process

Info

Publication number: CN102207439B
Application number: CN 201110066717
Authority: CN
Inventors: 李长生
Original assignee: Northeastern University China
Current assignee: Northeastern University China
Priority date: 2011-03-18
Filing date: 2011-03-18
Publication date: 2012-12-05
Anticipated expiration: 2031-03-18
Also published as: CN102207439A

Abstract

The invention discloses experimental equipment for simulating friction and wear of roll and rolled piece in a rolling process. The experimental equipment comprises motors, a universal joint, an elastic coupling, a work bench, a servo electric cylinder, transmission shafts, a rolled piece specimen, a roll specimen, a connection shaft, supporting seats and an induction heating apparatus. The two motors are fixed on the work bench, wherein the upper motor is connected with the rolled piece specimen through the universal joint and the upper transmission shaft, the lower motor is connected with the roll specimen through the elastic coupling and the lower transmission shaft. The upper transmission shaft and the lower transmission shaft respectively penetrate the upper supporting seat and the lower supporting seat. The two supporting seats are connected with the servo electric cylinder through the connection shaft. Two ends of the servo electric cylinder are respectively fixed on the connection shaft and the upper supporting seat. A servomotor provides power for the servo electric cylinder. Contact pressures of the rolled piece specimen and the roll specimen are imposed through the servo electric cylinder. The induction heating apparatus is arranged above the rolled piece specimen. A lubrication cooling device is arranged above the ring surface of the roll specimen. The experimental equipment has advantages of simple structure, stable performance, and has important meaning for decreasing the friction and the wear of the roll and improving quality of steel products.

Description

The experimental facilities of a kind of analog rolling process roll and rolled piece rubbing wear

Technical field

The invention belongs to technical field of steel rolling, the experimental facilities of particularly a kind of analog rolling process roll and rolled piece rubbing wear.

Background technology

Along with the raising of steel rolling equipment manufacture level, to robotization, high speed and intelligent direction development, steel rolling production efficiency and production quality control require also increasingly high rolling technique gradually.And in the steel rolling production run, roll consumption that the roll rubbing wear causes is high and the influence of surface quality of steel is still so far waits the problem that solves in the industry.

The experimental facilities that a kind of material surface rubbing wear state commonly used is studied is a friction wear testing machine; The mode of action of existing friction wear testing machine friction pair in experimentation and the roll of rolling process and the mode of action of rolled piece differ greatly, and cause analog result to have bigger system deviation; The equipment that another kind of rubbing wear is analyzed is the laboratory bar milk; Processes such as utilize bar milk to be rolled experiment, the rubbing wear material surface state of roll and rolled piece is detected in experiment back, and the laboratory rolling experiment need heat steel, for a long time rolling; Consumable material is many, and cost is high.

Summary of the invention

Defective to existing friction-wear test equipment; The present invention provides the experimental facilities of a kind of analog rolling process roll and rolled piece rubbing wear; Through the rubbing wear state on simulation experiment study roll and rolled piece surface, for exploitation roll material, minimizing roll consumption and raising product made from steel surface quality provide a kind of technological experiment research platform.

Experimental facilities provided by the invention; Comprise motor, following motor, universal-joint spindle, spring coupling, worktable, servo electric jar, go up transmission shaft, lower drive shaft, rolled piece sample, roll sample, go up supporting seat, coupling shaft, following supporting seat, induction heating apparatus; Last motor, following motor are fixed on the worktable, and last motor is connected the rolled piece sample through universal-joint spindle with last transmission shaft; Following motor is connected the roll sample through spring coupling with lower drive shaft; The rolled piece sample is positioned at directly over the roll sample, and two samples contact; Last transmission shaft runs through supporting seat, and lower drive shaft runs through supporting seat down; Upper and lower supporting seat is connected with servo electric jar through coupling shaft, and servo electric jar one end is fixed on the coupling shaft, and the other end is fixed on the supporting seat; The power of servo electric jar is provided by a servomotor, and the control break servo electric jar through servomotor is applied to the pressure on rolled piece sample and the roll sample; Load coil is arranged on rolled piece sample top.

The oral-lateral annulus surface that rotates of said roll sample is provided with lubricating and cooling, and the present invention establishes the roll sample and turns clockwise, and lubricating and cooling is made up of nozzle, pipeline, water pump and emulsion box.

During experiment; Last motor, following motor drive the rolled piece sample through universal-joint spindle, spring coupling respectively and the roll sample circumferentially rotates; Rolled piece sample and roll sample are discoid; The velocity of rotation of two samples is by upper and lower Electric Machine Control, and servo electric jar converts the rotation of servomotor the rectilinear motion of push rod into, thereby forms rolled piece sample and roll sample applied pressure; In the experimentation; Connect induction power supply; Through load coil the rolled piece sample is heated; Utilize water pump from emulsion box, to extract emulsion, it is cooled off and lubricates to the mode that the roll sample sprays emulsion through nozzle again, the contact pressure of rolled piece sample and roll sample and rotating speed are confirmed according to the roll-force and the advancing slip value of the operation of rolling respectively; Experiment is taken off rolled piece sample and roll sample after finishing, and sample is carried out pattern and structure observation analysis.

The invention has the beneficial effects as follows: this experimental facilities is simple in structure; Stable performance; And it is little to record the sunykatuib analysis data error; Be applicable to the simulation of operation of rolling roll and rolled piece rubbing wear state, breaker roll manufacturing industry and steel rolling industry exploitation roll material, minimizing roll consumption and raising steel product surface quality are significant.

Description of drawings

Fig. 1 is the equipment overall structure synoptic diagram of the embodiment of the invention;

Fig. 2 be Fig. 1 to view;

Motor on 1 among the figure, 2 times motors, 3 universal-joint spindles, 4 spring couplings, 5 worktable, 6 servo electric jars, transmission shaft on 7,8 lower drive shafts, 9 rolled piece samples, 10 roll samples, 11 load coils, 12 nozzles, supporting seat on 13,14 coupling shafts, 15 times supporting seats.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Experimental facilities provided by the invention; Comprise motor 1, following motor 2, universal-joint spindle 3, spring coupling 4, worktable 5, servo electric jar 6, go up transmission shaft 7, lower drive shaft 8, rolled piece sample 9, roll sample 10, go up supporting seat 13, coupling shaft 14, following supporting seat 15, induction heating apparatus and lubricating and cooling; Last motor 1, motor 2 is fixed on the worktable 5 down, and last motor 1 passes through universal-joint spindle 3 and is connected rolled piece sample 9 with last transmission shaft 7; Following motor 2 is connected roll sample 10 through spring coupling 4 with lower drive shaft 8; Rolled piece sample 9 is positioned at directly over the roll sample 10, and two samples contact; Last transmission shaft 7 runs through supporting seat 13, and lower drive shaft 8 runs through supporting seat 15 down; Upper and lower supporting seat is connected with servo electric jar 6 through coupling shaft 14, and servo electric jar 6 one ends are fixed on the coupling shaft 14, and the other end is fixed on the supporting seat 13; The power of servo electric jar 6 is provided by a servomotor; Utilize the closed-loop control characteristic of servomotor; Realization is applied to the pressure on rolled piece sample 9 and the roll sample 10 to the accurate control of servo electric jar 6 thrusts, speed and position to change servo electric jar 6; Induction heating apparatus is made up of induction power supply and load coil 11, and load coil 11 is arranged on rolled piece sample top, and its two ends connect induction power supply; Lubricating and cooling is made up of nozzle 12, pipeline, water pump and emulsion box, and what nozzle 12 was arranged on roll sample 10 rotates oral-lateral annulus surface, and the present invention establishes roll sample 10 and turns clockwise, and is as shown in Figure 2.

During experiment; Last motor 1, down motor 2 respectively through universal-joint spindle 3, spring coupling 4 drives rolled piece samples 9 and roll sample 10 circumferentially rotates; Rolled piece sample 9 is discoid with roll sample 10; The velocity of rotation of two samples is by upper and lower Electric Machine Control, and servo electric jar 6 converts the rotation of servomotor the rectilinear motion of push rod into, thereby forms rolled piece sample 9 and roll sample 10 applied pressures; In the experimentation; Connect induction power supply; Heat through 11 pairs of rolled piece samples 9 of load coil; Utilize water pump from emulsion box, to extract emulsion, it is cooled off and lubricates to the mode that roll sample 10 sprays emulsion through nozzle 12 again, the contact pressure of rolled piece sample 9 and roll sample 10 and rotating speed are confirmed according to the roll-force and the advancing slip value of the operation of rolling respectively; After experiment finishes, take off rolled piece sample 9 and roll sample 10, sample is carried out pattern and structure observation analysis.

Go up motor 1, following motor 2 employing direct current generators in the present embodiment; Steady because of its running, noise is low, has good operation, startup and braking characteristic; Speed adjusting performance is steady, and Pass Test equipment rolled piece sample is realized different rotating speeds, the different functional requirement that turns to the roll sample in process of the test; Spring coupling 4 transmission efficiencies that adopted are high; Load-bearing capacity is big, and it is the effect of dynamic property that buffering, damping and raising axle are arranged, simultaneously universal-joint spindle 3 can also compensate with spring coupling 4 since make with alignment error cause radially, axial and angular error; Avoid axle head to produce excessive additional load; Relax the torsional pulse on the axle, change the resonance speed of axle system, thereby reduce experimental error.

The main experiment parameter that present embodiment adopts is following:

Rolled piece sample 9: be of a size of Φ 150mm ~ 350mm * 50mm ~ 150mm, material is the ST12 steel.

Roll sample 10: be of a size of Φ 100mm ~ 300mm * 80mm ~ 200mm, material is high CrNi infinitely chilled ductile cast iron.

Last motor 1, motor 2 down :Model is Z2-41/5.5kW/220V/3000 rpm.

Servo electric jar 6: model is IM40.

Induction power supply: power is 120kW, and frequency is 30 ~ 1000kHz.

Lubricating and cooling: emulsion box is of a size of 4m ³, the corrosion resistant plate manufacturing; Pump power is 7.5kW, and flow is 4.4

Figure 2011100667172100002DEST_PATH_IMAGE001

, lift is 82 meters; Nozzle is 240 ° of ring nozzles, the recirculated water pressure cooling system.

Sample rotating speed: 0.3 ~ 5m/s.

Advancing slip value: 1% ~ 10%.

Record the contact pressure 6.7 ~ 8.9kN between rolled piece sample 9 and the roll sample 10, rolled piece sample 9 test temperatures are 820 ℃ ~ 930 ℃, and roll sample 10 test temperatures are 189 ℃ ~ 620 ℃.

Claims

1. the experimental facilities of analog rolling process roll and rolled piece rubbing wear; Comprise motor, following motor, universal-joint spindle, spring coupling, worktable, servo electric jar, go up transmission shaft, lower drive shaft, rolled piece sample, roll sample, go up supporting seat, coupling shaft, following supporting seat, induction heating apparatus; It is characterized in that: upward motor, following motor are fixed on the worktable, and last motor is connected the rolled piece sample through universal-joint spindle with last transmission shaft; Following motor is connected the roll sample through spring coupling with lower drive shaft; The oral-lateral annulus surface that rotates of roll sample is provided with lubricating and cooling, and lubricating and cooling is made up of nozzle, pipeline, water pump and emulsion box; The rolled piece sample is positioned at directly over the roll sample, and two samples contact; Last transmission shaft runs through supporting seat, and lower drive shaft runs through supporting seat down; Upper and lower supporting seat is connected with servo electric jar through coupling shaft, and servo electric jar connects a servomotor, and servo electric jar one end is fixed on the coupling shaft, and the other end is fixed on the supporting seat; Induction heating apparatus is arranged on rolled piece sample top.