CN202337800U

CN202337800U - Double-frequency induction heating quenching machine tool for casting products

Info

Publication number: CN202337800U
Application number: CN2011203884307U
Authority: CN
Inventors: 沈永毅
Original assignee: DAFENG YONGWEI MACHINERY FACTROY
Current assignee: DAFENG YONGWEI MACHINERY FACTROY
Priority date: 2011-10-12
Filing date: 2011-10-12
Publication date: 2012-07-18
Anticipated expiration: 2021-10-12

Abstract

The utility model discloses a double-frequency induction heating quenching machine tool for casting products, comprises a portal frame, a roller lifting clamper and a power device which drives the roller lifting clamper to lift and rotate through a drive mechanism, and is characterized in that a quenching water spraying ring is arranged at the bottom of the portal frame, and a 50 Hz electromagnetic sensor and a 250 Hz electromagnetic sensor are arranged on the quenching water spraying ring. The power device is composed of a working feed servo motor, a motor for rotation, two drive screw rods, a lifting beam, a drive connecting rod, and two turbine vortex rod reduction gears. The working feed servo motor and a fast forward alternating current motor are connected with the two turbine vortex rod reduction gears respectively through electromagnetic clutches. As the structure is utilized, double-frequency induction heating quenching has an obvious effect on medium and large rollers, through quenching depth is increased, surface hardness of rollers is improved, yield strength, breaking strength, plasticity and tenacity of steels are enhanced, and abrasion resistant and accident proof performances of rollers are improved.

Description

Cast article is used the double frequency induction hardening machine

Technical field

The utility model relates to a kind of quenching machine, specifically is that a kind of cast article is used the double frequency induction hardening machine.

Background technology

Along with the continuous progress of science and technology and the continuous development of modern industry; Market is also increasingly high to the requirement of the cold rolled sheet quality that iron and steel enterprise produces; Especially cold rolled sheet is extensive in many sector applications such as light industry, automobile, building, railways, is the important component part of these industry products.Therefore; Cold roll is as the core instrument in this procedure of plate rolling, and improving and raising of its performance also becomes the focus that producer is paid close attention to; Require the roller body surface must have height and uniform hardness, to guarantee the dimensional precision and the favorable surface quality of cold-strip or steel plate; Roll body has certain depth of hardening zone and stronger anti-accident ability, reduces the roll number of times of heavily quenching in use, thus durable in use reducing cost.The cold roll Production Flow Chart is following: starting material are prepared an electrosmelting one esr one and are forged a forging post-heat-treated one Spheroidizing Annealing one roughing one modified thermal treatment one processing under cooling; Wherein modified thermal treatment is the comprehensive thermal treatment process of quenching and high tempering; Main purpose is to make roll obtain all reasonable comprehensive mechanical performance of intensity, plasticity, toughness, and the quality of quality has decisive influence after this link breaker roll moulding.This subject study object is the metallurgical equipment that is used for carrying out induction quenching to roll in the modified thermal treatment---the system of 50Hz/250Hz double frequency quenching machine.

The later stage seventies 20th century; Wuhan Iron and Steel Plant has been introduced cold rolled sheet, hot rolled strip, siliconized plate and continuously poured unit n1 from states such as Germany, Belgium and Japan; In order to furnish funds for 3,000,000 dollars to have introduced the MTCL-18 type 50Hz/250Hz double frequency induction quenching unit that is used for the machining large cold roll from Belgian O.s.B company with the cold rolled sheet machine is supporting; And it is located at cold rolling mill, since then, OSB double frequency quench method begins fashionable China; Baosteel in 1994, is also used 6,890,000 dollars and the 1250 ten thousand dollars 50Hz/250Hz double frequency quenching units of having introduced (comprising modified) same model in, Xing Ye in 1989 respectively subsequently.This cover unit design science seems very terse with respect to other large-scale processors, and level of automation is quite high, is quite advanced at that time, and the output and quality assurance of stable brilliance is provided for the roll production of this three tame enterprise.With the Wuhan steel cold rolling factory is example, goes into operation from 1979, successfully heavily quenches, repaired more than 15000 working roll over 26 years, and average annual roller quenching quantity is about 600～700, creates 1.875 hundred million yuan of direct economic benefits.But because duration of service long (with respect to the external 15 years equipment scrapping phase), equipment is serious aging, and particular problem is following:

(1) unit key part well damage, performance do not reach and require and be difficult to repair, and for example with the supporting Working transformer of 50Hz ruhmkorff coil, the coupling of inductance and electric capacity is difficult to reach optimum regime etc.;

(2) temperature closed loop microcomputer automatic control system paralysis can only be quenched by the manual operation controlled temperature, and thermometric also rests on the manual thermometric level of primary, is difficult to guarantee the processing quality of cold roll;

(3) equipment and spare part lacks.Because ageing equipment, a lot of spare parts need to change, but have ordered less than former assembly parts basically both at home and abroad now.Do not have equipment replacement like 250Hz resonant tank to main contactor burning of contact, hanging down appears neglecting in the controlled frequency of the converter plant plug-in card of 250Hz analog quantity control neglects high phenomenon, can't handle.Operator's console control original paper also can't works better like power-factor indicator transmodulator, frequency meter transmodulator etc.;

(4) relay logic complex connection, what various alternating current machine adopted is contactor control modes such as contactor, intermediate relay, the time relay, failure rate is high;

(5) tuning condenser is totally 25 groups, and what still use is poisonous dielectric one polychlorobiphenyl of having forbidden in the world, harmful, is that environmental administration specifies and need eliminate.Meanwhile; The progress of incompatibility roll production technique is to the high request of automatic control integrated level for the electrical control system of lathe and system of supervision technology, and the backwardness of the inconvenience of data gathering and database management technology has restricted the raising of roll output, quality to a great extent in control complex procedures, the quenching process.

The utility model content

In order to overcome above-mentioned deficiency, the utility model purpose is to provide a kind of ys, tension strength at break, plasticity and flexible cast article that can strengthen institute's processing work to use the double frequency induction hardening machine.

To achieve these goals, the technical scheme below the utility model adopts:

Cast article is used the double frequency induction hardening machine; Comprise portalframe, roll stone tongs and PWR PLT; PWR PLT drive the up-down of roll stone tongs do through transmission rig and rotatablely move; It is characterized in that: the bottom of said portalframe is provided with quenching water spray ring; The top of said quenching water spray ring is provided with 50Hz electromagnetic inductor and 250Hz electromagnetic inductor, said PWR PLT be by the worker advance servomotor, the rotation constitute with motor, two drive lead screws, hoisting cross beam, kinematic link and two turbine worm step-down gears, two drive lead screws vertically are located on the portalframe; Its lower end is installed in the bottom of portalframe respectively through bearing; The upper end connects with two turbine worm step-down gears that are located at the portalframe top successively, and the worker advances servomotor and drives one of them turbine worm step-down gear rotation, and a turbine worm step-down gear drives another turbine worm step-down gear through kinematic link and rotates; Two turbine worm step-down gears drive two drive lead screws and rotate; Two drive lead screws drive the hoisting cross beam that spiral with it connects and do up and-down movement, and said roll stone tongs is located on the hoisting cross beam with motor with rotation, and rotation drives roll stone tongs through rotation with step-down gear with motor and rotates; Said worker advances servomotor and drives one of them turbine worm step-down gear rotation through MC, and another turbine worm step-down gear connects with the F.F. alternating current machine through MC.

Also be provided with the PLC unit on the said portalframe; Said worker advances servomotor and adopts 5.5KW; The AC servo motor of 1500RAD/MIN, the F.F. alternating current machine adopts 22KW, the AC servo motor of 1500RAD/MIN; Rotation is with the alternating current machine of motor employing 2.2KW, and the PLC unit advances servomotor, rotates and control with motor and F.F. motor the worker.

The beneficial effect of the utility model: owing to adopt above-mentioned structure formation; The double frequency induction quenching in, the large-scale roller effect is remarkable; Increase full hardening deepness, improved the surface hardness of roll; Strengthen ys, tension strength at break, plasticity and the toughness of steel, improved the performance of the wear-resisting and anti-accident of roll.

Description of drawings

Below in conjunction with accompanying drawing the utility model is done further to specify.

Fig. 1 is the structural representation of the utility model.

Among the figure: 1, F.F. alternating current machine; 2, electromagnetic brake; 3, step-down gear; 4, turbine worm step-down gear; 5, MC; 6, interchange department clothes step-down gear; 7, the worker advances servomotor; 8, kinematic link; 9, step-down gear is used in rotation; 10, motor is used in rotation; 11, drive lead screw; 12, tail rod; 13, hoisting cross beam; 14, roll stone tongs; 15, roll; 16, chock; 17, quenching water spray ring; 18,50Hz electromagnetic inductor; 19,250Hz electromagnetic inductor; 20, roll is top; 21, continuous water cooling pond; 22, portalframe.

Embodiment

As shown in Figure 1; Cast article is used the double frequency induction hardening machine; Comprise portalframe 22, roll stone tongs 14 and PWR PLT; Portalframe 22 adopts the portalframe structure of four columns, and the bottom of portalframe 22 is provided with quenching water spray ring 17, and the top of said quenching water spray ring 17 is provided with 50Hz electromagnetic inductor 18 and 250Hz electromagnetic inductor 19.Said PWR PLT be by the worker advance servomotor 7, rotation constitutes with motor 10, two drive lead screws 11, hoisting cross beam 13, kinematic link 8 and two turbine worm step-down gears 4; Two drive lead screws vertically are located on the portalframe; Its lower end is installed in the chock 16 of the lower side of portalframe 22 respectively through bearing; The upper end connects with two turbine worm step-down gears 4 that are located at the portalframe top successively; Said worker advances servomotor 7 and connects with one of them turbine worm step-down gear 4 with MC 5 through interchange department clothes step-down gear 6; Another turbine worm step-down gear 4 connects with F.F. alternating current machine 1 through MC and step-down gear 3; The worker advances servomotor 7 or F.F. alternating current machine 1 drives 4 rotations of a turbine worm step-down gear, and a turbine worm step-down gear drives another turbine worm step-down gears through kinematic link 8 and rotates, and two turbine worm step-down gears 4 drive 11 rotations of two drive lead screws; Two drive lead screws 11 drive the hoisting cross beam 13 that spiral with it connects and do up and-down movement; Said roll stone tongs 14 is located on the hoisting cross beam 13 with motor 10 with rotation, and rotation drives roll stone tongs 14 through rotation with step-down gear 9 with motor 10 and rotates, and roll stone tongs 14 drives roll 15 and rotates.F.F. alternating current machine 1 is provided with electromagnetic brake 2.The bottom of portalframe 22 is provided with roll top 20.Vertically disposed tail rod 12 also is housed on the said hoisting cross beam 13.The bottom of portalframe 22 also is provided with continuous water cooling pond 21.

Also be provided with the PLC unit on the portalframe 22; Said worker advances servomotor 7 and adopts 5.5KW; The AC servo motor of 1500RAD/MIN, F.F. alternating current machine 1 adopts 22KW, the AC servo motor of 1500RAD/MIN; Rotation is with the alternating current machine of motor 10 employing 2.2KW, and the PLC unit advances servomotor, rotates and control with motor and F.F. motor the worker.

Principle of work: MTCL--1 8 type 50Hz/250Hz cast articles adopt the large-scale cold rolling working roll of materials such as OSB induction hardening method processing 9Cr2Mo, Cr4, Cr5 with the double frequency induction hardening machine, the principle of this method is to load and sling with the roll that lathe will pass through preheating, and F.F. electric machine control roll descends until the inductor block zone; Open rotating machine subsequently and the worker advances motor; Roll is descended with the speed rotation of processing requirement, and order gets into the ring-type inductor block of 50Hz (power frequency) and two frequencies of 250Hz (intermediate frequency), meanwhile passes to alternating-current through X-former to inductor block; Thereby produce two alternating magnetic fields respectively; Roll produces inductive current under action of alternating magnetic field, because surface action, surface temperature is elevated to quenching temperature rapidly; Quench rings in roller surface, realizes jet of water to quench subsequently.The collection skin layer of eddy current of inducting during the 50Hz induction heating is darker; Roller surface reaches certain temperature in dark zone; Fall loss by the temperature in the 250Hz induction heating compensation traveling process then, prolong austenitizing time, the body of roll is heated to final quench-hardened case temperature.

Claims

1. a cast article is used the double frequency induction hardening machine; Comprise portalframe, roll stone tongs and PWR PLT; PWR PLT drive the up-down of roll stone tongs do through transmission rig and rotatablely move; It is characterized in that: the bottom of said portalframe is provided with quenching water spray ring, and the top of said quenching water spray ring is provided with 50Hz electromagnetic inductor and 250Hz electromagnetic inductor, said PWR PLT be by the worker advance servomotor, the rotation constitute with motor, two drive lead screws, hoisting cross beam, kinematic link and two turbine worm step-down gears; Two drive lead screws vertically are located on the portalframe; Its lower end is installed in the bottom of portalframe respectively through bearing, the upper end connects with two turbine worm step-down gears that are located at the portalframe top successively, and the worker advances servomotor and drives one of them turbine worm step-down gear rotation; A turbine worm step-down gear drives another turbine worm step-down gear through kinematic link and rotates; Two turbine worm step-down gears drive two drive lead screws and rotate, and two drive lead screws drive the hoisting cross beam that spiral with it connects and do up and-down movement, and said roll stone tongs is located on the hoisting cross beam with motor with rotation; Rotation drives roll stone tongs through rotation with step-down gear with motor and rotates; Said worker advances servomotor and drives one of them turbine worm step-down gear rotation through MC, and another turbine worm step-down gear connects with the F.F. alternating current machine through MC, and it is top that the bottom of said portalframe is provided with roll.

2. cast article according to claim 1 is used the double frequency induction hardening machine; It is characterized in that: also be provided with the PLC unit on the said portalframe, said worker advances servomotor and adopts 5.5KW, the AC servo motor of 1500RAD/MIN; The F.F. alternating current machine adopts 22KW; The AC servo motor of 1500RAD/MIN, rotation are with the alternating current machine of motor employing 2.2KW, and the PLC unit advances servomotor, rotates and control with motor and F.F. motor the worker.