CN101737409B

CN101737409B - Production technology for heavy type super-long shaft

Info

Publication number: CN101737409B
Application number: CN2008102285024A
Authority: CN
Inventors: 王明德; 王铁金; 张志良
Original assignee: HAICHENG DETAI MACHINERY MANUFACTURING Co Ltd
Current assignee: HAICHENG DETAI MACHINERY MANUFACTURING Co Ltd
Priority date: 2008-11-04
Filing date: 2008-11-04
Publication date: 2011-08-17
Anticipated expiration: 2028-11-04
Also published as: CN101737409A

Abstract

The invention relates to production technology for a heavy type super-long shaft. The process comprises the procedures of material preparing, heating, forging, cooling or heat treating and finished product inspecting. In the process, a production line is reasonably arranged; forging and pressing equipment is arranged along a line according to the maximum capacity volume of the forging and pressing equipment; compact layout of two parallel production lines is formed by forging and pressing and heating; and heated steel ingots are directly delivered to the forging and pressing equipment by a crane, and then forged and pressed forged pieces are transported to a heat treatment furnace or a slow cooling pit by the crane. In the process, the procedures are in close fit with each other and are reasonably joined together through reasonable arrangement of the equipment; and the heating number is reduced, so the switching between procedures is reduced, the working efficiency is enhanced, energy loss is reduced and the manufacturing cost is greatly lowered.

Description

The production technology of heavy type super-long shaft

Technical field

The present invention relates to a kind of production technology of heavy type super-long shaft.

Background technique

Conventional Forging Technology, heating, forge, the operation of cooling disconnects, auxiliary time of production is longer, the rate of utilization of work hour and equipment start index such as rate and are in a backward condition, product yield is difficult to raising.Especially length surpasses 8 meters heavy axial workpiece, generally is to weld together after forging beam warp roughing with two or many, again through annealing, carry out after the assay was approved processing at end and heat treatment.The major axis that this technology is made, the operation that relates to is many, and the forging stock utilization only is 50-60%, and utilization rate of raw materials only is 40-50%, and reject rate is high, the energy consumption height, the mechanical property of part is compared with solid forging processing, has a long way to go.

The forging extreme length of producing the axle class as our factory in the past can not surpass 10 meters, and maximum weight is below 5 tons.The employing single device is produced, and heats, forges, and heats, forges, and forging such part need heat 4-5 time.Inter process also will be changed hammering block and mold, and manufacturing efficiency is low, and energy consumption height, iron coal ratio are sometimes up to 1:1.2, and comprehensive energy consumption (ton forging, ton mark coal) reaches 1:2.5.And labor strength is big, work under bad environment.Under this kind state, the monthly output forging is paced up and down at the 200-300 ton always, is difficult to satisfy user's demand.

Summary of the invention

For solve prior art energy consumption height, inefficiency, yield poorly, the major axis part needs two-part welding to influence problems such as performance index, the invention provides a kind of production technology of heavy type super-long shaft, this technology is by the reasonable Arrangement of equipment, each inter process is closely cooperated, and reasonable link adds showing tremendous enthusiasm time by minimizing, reduce the conversion of inter process, increase work efficiency, reduce energy loss, fabricating cost is reduced greatly.

The present invention is achieved through the following technical solutions:

The production technology of heavy type super-long shaft, this technology comprise get the raw materials ready, heat, forging, cooling or heat treatment, Checking of finished products operation.This technology by reasonable Arrangement production line, maximum capacity dosage according to forging equipment, the forging equipment being aligned is arranged, forge and press and add the compact layout of two parallel lines of thermosetting, to heat steel ingot with crane and directly flow to forging equipment, and then with crane will forge and press the back forging be transported to heat treatment furnace or burial pit.Concrete process step is as follows;

1) pressing the heating process card heats blank (steel ingot);

2) be delivered to forging equipment with crane, forge through manipulator and electric liquid hammer or hydraulic press by the Forging Technology card;

3) be transported to burial pit or heat treatment furnace with crane as required after forging is finished;

4) to above-mentioned forging two ends crop, check, finished product warehouse-in.

The equipment that production technology adopted of described heavy type super-long shaft; This equipment comprises the heating plant be made up of gas producer, continous way gas-fired furnace, semi-coal gas oven, Type Car-bottom Heat Treating Furnace, is arranged in line by electric liquid hammer, hydraulic press forging equipment and supplementary equipment, gas producer, oven; Electricity liquid hammer, manipulator, hydraulic press are arranged in line; Two straight line parallels, 3 cranes transport forging or steel ingot with the shortest distance.

Compare with past technology, advantage of the present invention is: ECDC removing the work row standard equipment, replace conversion between work step by closely cooperating of inter process, thereby significantly reduced the auxiliary time between former operation work step, reduced and added showing tremendous enthusiasm time, reduce labor intensity, increased substantially productivity and forging quality, realized energy-conserving and environment-protective.

1) use of crane makes the material circulation unimpeded reasonable, can make the blank of heating directly deliver to forging equipment with the shortest stroke, saves time and the energy, reduces to add showing tremendous enthusiasm time.

2) heating process is the master operation in the Forging Technology, and heating quality is directly connected to forging quality and manufacturing efficiency.Heating plant selects for use semi-coal gas oven, line of coal gas continuous furnace to arrange; Compare with coal-fired reverberating furnace, the thermal efficiency is enhanced about more than once;

3) forging equipment is integrated; Two hydraulic presses, an electric hydraulic free hammer, three equipment being aligneds are arranged, by four manipulator for forgings the said equipment are linked together, and have realized the cooperation and the production of the different machines of hydraulic press forging hammer, maneuverability has reduced the setup time of operation and has added showing tremendous enthusiasm inferior;

4) can hold the application of 100 tons slow cooling melt pit and 16 meters of effective lengths, wide 1.5 meters three-section type Type Car-bottom Heat Treating Furnace, satisfied the slow process for cooling requirement of large forgings, heat treatment furnace has been born forging annealing, and normalizing and artificial aging work of treatment make forging quality obtain further assurance.

5) former forging hammer uses pressurized air, and conveying circuit is long, and tube wall loss and the many leakage losses of bend loss are unavoidable, and is many to the pressure loss hammer by air compressor, instigates the striking capabilities of hammer to descend.Electrification and hydraulic pressure drag, the capacity usage ratio height, and this all is useful to the economize on electricity and two aspects of enhancing productivity.

6) use of shape anvil can guarantee in single face 10mm the machining allowance of forging.Can reduce metal consumption in a large number, make the forging any surface finish, guarantee the appearance quality of forging.

Description of drawings

Fig. 1 is the layout plan of the production line of heavy type super-long shaft.

Fig. 2 is the forging flow chart of forging.

Fig. 3 is the structural drawing of swage block.

Among the figure: 1-gas producer 2-semi-coal gas oven 3-continous way gas-fired furnace 4-Type Car-bottom Heat Treating Furnace 5-burial pit 6-electricity liquid hammer 7-crane 8-manipulator 9-hydraulic press

Embodiment

The production technology of heavy type super-long shaft, this technology comprise get the raw materials ready, heat, forging, cooling or heat treatment, the Checking of finished products operation, this technology makes each inter process closely cooperate reasonable link by the reasonable Arrangement of equipment, add showing tremendous enthusiasm time by minimizing, reduce the conversion of inter process, increase work efficiency, reduce energy loss; See Fig. 1, heating plant and slow cooling melt pit being aligned arrange that the forging equipment being aligned is arranged, forms the compact layout of two parallel productions, transport steel ingot or forging is directly carried by crane.

Select equipment for use:

1) crane: material transports

2) heating plant: continous way gas-fired furnace, line of semi-coal gas oven are arranged;

3) forging equipment: two hydraulic presses, an electric liquid hammer, three equipment being aligneds are arranged;

4) slow cooling melt pit: line of trolley type heat treatment and oven is arranged compact structure.With 45#-8T forging Φ 280X 13500 is example.

Be described in detail forging manufacturing process of the present invention in conjunction with Fig. 2.

1) sees Fig. 2-1, the shape of steel ingot to be heated;

2) in the semi-coal gas oven, ingot was heated to be under 900 degrees centigrade ± 30 the temperature conditions insulation 4 hours,, is warming up to 1260 ± 20 degrees centigrade, be incubated 2.5 hours and come out of the stove then through 3 hours intensification.

3) be delivered to forging equipment with crane, carry out chamfered edge, tip-tap, the side's of setting right chamfered edge through rotary type manipulator and electric liquid hammer, 950 degrees centigrade of shapes of temperature are shown in Fig. 2-2.

4) manipulator backhaul 180 degree fall circle, finishing to the 1000T hydraulic press that energy is housed, and stop forging temperature and be not less than-700 degrees centigrade shown in Fig. 2-3, to dial the position marking.

5) with crane above-mentioned forging is delivered to electric liquid hammer oven, deformed end is not heated, about heating-up temperature to 1200 degree centigrade, then, again forging is delivered to the revolution operation,, on hydraulic press, fall circle, finishing the deformed end side of setting right chamfered edge not; Forging shown in Fig. 2-4,750 degrees centigrade of terminal temperatures.

6) by Band saw machine to above-mentioned forging two ends crop, the check, finished product is shown in Fig. 2-5.

Claims

1. the production technology of heavy type super-long shaft, this technology comprise get the raw materials ready, heat, forging, cooling or heat treatment, Checking of finished products operation, this technology by reasonable Arrangement production line, maximum capacity dosage according to forging equipment, the forging equipment being aligned is arranged, forges and presses and add the compact layout of two parallel lines of thermosetting, will heat steel ingot with crane and directly flow to forging equipment, and then will forge and press the back forging with crane and be transported to heat treatment furnace or burial pit, concrete process step is as follows;

1) presses the heating process card with blank heating;

2. the equipment that production technology adopted of heavy type super-long shaft according to claim 1, it is characterized in that, this equipment comprises the heating plant be made up of gas producer, gas-fired furnace, semi-coal gas oven, Type Car-bottom Heat Treating Furnace, forms forging equipment by electric liquid hammer, manipulator, hydraulic press, and gas producer, gas-fired furnace, semi-coal gas oven are arranged in line; Electricity liquid hammer, manipulator, hydraulic press are arranged in line; Two straight line parallels transport forging with the shortest stroke being provided with frame crane between forging equipment and heating plant between two straight lines.