CN2320626Y

CN2320626Y - Surface hardening equipment of roll and smoothing roll

Info

Publication number: CN2320626Y
Application number: CN 97231850
Authority: CN
Inventors: 王树敏
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-25
Filing date: 1997-12-25
Publication date: 1999-05-26
Anticipated expiration: 2007-12-25

Abstract

The utility model relates to a surface quenching device for a rolling roller and a straightening roller. The quenching device comprises a machine tool, an argon arc welding machine and a water spray nozzle. A rolling roller and a straightening roller rotate in a certain peripheral speed, an argon-arc torch welding torch is moved along the axial direction of the rolling roller and the straightening roller in a fit speed, and the water spray nozzle is fixed below the welding torch. Argon protects electric arc which burns, and the surfaces of the rolling roller and the straightening roller are heated, simultaneously, the water spray nozzle sprays water to carry out cooling and quenching on the rolling roller and the straightening roller which are heated. In the method provided by the utility model, the utility model has the advantages of simple devices, low cost, high hardness of the rolling roller and the straightening roller, and no generation of cracks.

Description

A kind of roll and straightening roll hard surfacing equipment

The utility model belongs to roll, straightening roll thermal treatment field, particularly roll, straightening roll hard surfacing equipment.

Roll, straightening roll hard surfacing great majority adopt induction quenching at present.Iron と steel, 1971,57, NO.5,116-125 discloses a kind of like this DFS double frequency shift dynamic formula induction quenching roll, during quenching, then adjusts its quenching temperature and temperature distribution by the Medium frequency induction coil with the low frequency induction coil heats earlier, roll rotates on one side, near Medium frequency induction coil below little by little carrying out spray quenching on one side.This method needs facility investment big, and electrical capacity is also big.Induction heating is more suitable to the plain-barreled roll quenching in addition, and is difficult to shaped roll, the hard surfacing of straightening roll pass.

The Laser Surface Treatment roll of nearest invention, roll rotates along axial line, and laser beam moves vertically, and this method can improve roll hardness, and can also handle superhard roll.But facility investment is big, and in addition, the light beam pulse deposite metal produces small arc crater on roll, should not use on finished product roller.

The purpose of this utility model provides a kind of roll, straightening roll hard surfacing equipment, it can increase the hardness of roll, straightening roll, because arc burning is stable, roll, straightening roll hardness are constant, applicable to the hard surfacing of shaped roll, straightening roll, and facility investment is few.

The utility model is achieved through the following technical solutions, and roll, straightening roll are fixed on the head of a bed and the tailstock, and argon-arc torch is fixed on the lathe cutter saddle, and water jet is fixed on below the argon-arc torch, and dial indicator is fixed on above the argon-arc torch.Lathe is by the engine lathe transformation of the way or special.

The burning of the utility model argon arc; breaker roll, the heating of straightening roll surface; in the arc heat quantity set; obtain darker hardened layer; roll, straightening roll hardness depth after handling like this are 1.5-5mm; macrohardness is HRC50, can obtain high-wearing feature like this, and this method is than induction heating less investment.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is the utility model synoptic diagram.

As shown in Figure 1, lathe, argon welder, argon-arc torch 2, water jet 1 are prior aries, are general part.Roll, straightening roll 5 are fixed on headstock and the tailstock, between lathe head of a bed chuck and the roll 5 insulating rubber slab is arranged, between the top and tailstock nylon jacket is arranged, between dial indicator seat, welding torch 2 and knife rest insulating rubber slab is arranged, between water jet 1, water coolant and the lathe insulating rubber slab is arranged, there is terminal stud at top place.Adopt the positive level of direct current property tungsten argon arc, the top positive pole that connects, tungsten electrode connects negative pole.Roll, straightening roll 5 materials are cast steel or spheroidal graphite infinitely chilled ductile cast iron.Roll, straightening roll 5 with the circumferential speed of 2-10mm/s along the rotation of roll axial line, roll, straightening roll 5 distances that welding torch 2 is laterally moved then just equal the to burn diameter of arc 3 that whenever circles.3 burnings of argon gas 4 protection electric arcs, electric arc 3 breaker rolls, straightening roll 5 surface heating, roll, straightening roll 5 surfaces are heated 850 ℃-900 ℃, water jet 1 below argon-arc torch 2, roll, straightening roll 5 surface sprinkling Cooling Quenching to having heated simultaneously.For the globule is splashed on argon gas 4, the burning arc 3, shower recedes 15-30 °, argon welder electric current 350A-400A, tungsten electrode diameter 6mm, nozzle diameter 16mm, argon gas 4 flow 12-14l/min, arc voltage 8-15V.At breaker roll, when straightening roll 5 passes quench, on argon-arc torch 2, fixedly dial indicator 6, dial indicator 6 contacts contact with roll, straightening roll 5, according to the continuous rotation handwheel of the value of reading of dial indicator 6, proofread and correct the spacing of argon-arc torch 2 and roll, straightening roll 5, make it maintain a definite value so that electric arc 3 stable burnings.

Claims

1, a kind of roll, the hard-faced equipment of straightening roll, form by lathe and water jet (1), it is characterized in that: argon-arc torch (2) is fixed on the lathe cutter saddle, and water jet (1) is fixed on below the argon-arc torch (2), and dial indicator (6) is fixed on above the argon-arc torch (2).

2, roll according to claim 1, the hard-faced equipment of straightening roll, it is characterized in that: lathe is the engine lathe transformation of the way or special, lathe head of a bed chuck and roll have insulating rubber slab between (5), between the top and tailstock nylon jacket is arranged, between dial indicator seat, welding torch (2) and knife rest insulating rubber slab is arranged, between water jet (1), water coolant and the lathe insulating rubber slab is arranged, there is terminal stud at top place.