CN1690233A

CN1690233A - Technological process for quenching and tempering bimetal bandsaw

Info

Publication number: CN1690233A
Application number: CN 200410037400
Authority: CN
Inventors: 干云标; 华国平; 马顺国; 俞川根
Original assignee: LEQING CITY ZHENGBEN SAW INDUSTRY Co Ltd
Current assignee: LEQING CITY ZHENGBEN SAW INDUSTRY Co Ltd
Priority date: 2004-04-30
Filing date: 2004-04-30
Publication date: 2005-11-02
Anticipated expiration: 2024-04-30
Also published as: CN100436606C

Abstract

A quenching and drawing technique for bimetallic zonal saw blade includes the following steps: 1) sending the cool treated zonal saw blade to quenching furnace with sender plate; 2) holding the surface of zonal saw blade in low-temperature with negative carbon brush and the surface in high-temperature with positive carbon brush; 3) the power outputted by circuit control system being rectified by loading serrasoid phaseshift circuit and then connected separately to the two ends of zonal saw blade in high and low temperature; 4) the draught device being started then the zonal saw blade generating heat and dissolving; 5) the draught device driving it to cooler quenching when the surface temperature of zonal saw blade reaching the quenching required; 6) the quenched zonal saw blade being dragged by draught device and winded up after drawing temper in tempering furnace. The steel-pipe construction of the quenching furnace heats uniformly, as a result, the property of the bimetallic zonal saw blade is well. And no needing of electric thread makes the heating rate increase and the electrical energy used decrease.

Description

The processing method of bi-metal bandsaw blades quenching and tempering

Technical field

The present invention relates to a kind of processing method of bi-metal bandsaw blades quenching and tempering.

Background technology

The bi-metal bandsaw blades that is widely used in conglomeraties such as machinofacture, metallurgy, chemical industry, military project, in manufacturing processed, all to pass through the quenching and tempering complete processing, and all be the mode of heating with nichrome wire to the quench treatment of bi-metal bandsaw blades in the world at present, its shortcoming is to be difficult to controlled temperature in the steady state value scope, cause bi-metal bandsaw blades can not obtain best quenching effect, saw blade quenches uneven, causes the hardness inequality, influences its work-ing life; Other is very big with nichrome wire heating, quenching power consumption, wastes energy.

Summary of the invention

The object of the present invention is to provide that a kind of production technique is reasonable in design, the processing method of simple and flexible operation bi-metal bandsaw blades quenching and tempering.

For achieving the above object, the present invention takes following design:

A kind of processing method of bi-metal bandsaw blades quenching and tempering, step is as follows:

1) will deliver in the quenching furnance through idler by belt-sending disk through the bands for band of cold making;

2) hold tight cold zone bands for band surface under the arm by the negative pole carbon brush, hold bands for band surface, tight high-temperature zone under the arm by anodal carbon brush again;

3) by circuit control system output DC source, this power supply inserts high and low warm area bands for band two ends respectively through loading the zigzag wave phase-shift trigger circuit after rectification;

4) towing mechanism starts, the heating dissolving of bands for band energising back;

5) quench when requiring temperature when the bands for band surface temperature reaches, towing mechanism drives bands for band and enters water cooler and quench;

6) bands for band behind quench hot draws through towing mechanism, through idler to the refined zone tempering by the machine reel rolling.

Advantage of the present invention is:

1, utilize bi-metal bandsaw blades as conductor, two ends energising heating is heat-treated, and it is fast to preheat speed, save energy; And homogeneous heating has guaranteed the processing characteristics of bi-metal bandsaw blades.

2, device structure is simple, easy operation control.

Description of drawings

Fig. 1 is a saw blade quenching and tempering device principle of compositionality synoptic diagram of the present invention

Embodiment

As shown in Figure 1, bi-metal bandsaw blades quenching and tempering device of the present invention is constituted by quenching and tempering treatment unit and sending and receiving belting based on conventional device, described quenching and tempering treatment unit comprises the quenching furnance 1 that a steel-tube construction constitutes, and sets up cold zone 101, Unit 102, high-temperature zone separately; Be associated with water cooler 2 at quenching furnance steel-tube construction afterbody.

The sending and receiving belting comes the sending and receiving bi-metal bandsaw blades by

idler

3,4,11,12 and towing mechanism 5; Be equipped with positive and negative

electrode carbon brush

6,7 at the two ends of quenching furnance.

Other is furnished with circuit control system, its prior art can realize, repeat no more herein, its major function is the output DC source, this power supply is added in the two ends of high and low warm area bands for band by the positive and negative electrode carbon brush after loading the rectification of zigzag wave phase-shift trigger circuit, with realization bi-metal bandsaw blades energising heating is heat-treated.

Referring to Fig. 1, the processing method concrete grammar step of bi-metal bandsaw blades quenching and tempering of the present invention is as follows:

1) will place through the bands for band of cold making on the belt-sending disk 8, and start, bi-metal bandsaw blades is sent to through idler by belt-sending disk and is reached appropriate location (front end reaches anodal carbon brush can seize the position on both sides by the arms) in the quenching furnance;

3) start-up circuit Controlling System, the output DC source, this power supply respectively is added in high and low warm area bands for band two ends by the positive and negative electrode carbon brush through loading the zigzag wave phase-shift trigger circuit after rectification;

4) start towing mechanism, the heating dissolving of bands for band energising back;

5) drive bands for band by towing mechanism and move in burner hearth, quench when requiring temperature when the bands for band surface temperature reaches (this temperature is generally 1200 degrees centigrade, optic zone saw blade starting material composition and discuss) enters the water cooler quenching;

6) bands for band behind quench hot is again through towing mechanism traction, through idler to tempering unit (tempering stove) 10 tempering by machine reel 9 rollings.

It is a circulation multiple process, goes round and begins again, and disposes until a bi-metal bandsaw blades that coils.

The present invention is directly to carry out heating quenching as conductor with bands for band to handle owing to adopt steel-tube construction, both guaranteed the bi-metal bandsaw blades uniformity in product performance, and processing method is simple, easy to operate, good reliability; General existing nichrome wire heating quenching needs 160 kilowatts of electricity consumptions, and this technology only needs 25 kilowatts, very save energy.

Claims

1, a kind of processing method of bi-metal bandsaw blades quenching and tempering is characterized in that method steps is as follows:

1) will deliver in the quenching furnance to the appropriate location through idler by belt-sending disk through the bands for band of cold making;

3) by circuit control system output DC source, this power supply inserts high cold zone bands for band two ends respectively through loading the zigzag wave phase-shift trigger circuit after rectification;