CN102925644B - Vacuum heat treatment and subzero treatment integrated machine - Google Patents

Abstract

The invention relates to a vacuum heat treatment and subzero treatment integrated machine and belongs to the field of metal heat treatment devices. The vacuum heat treatment and subzero treatment integrated machine is characterized in that four door openings are arranged on the left lateral face and the right lateral face of a middle corridor chamber in a two-to-two symmetrical mode and provided with unsealing and sealing doors which are respectively connected with a material loading and unloading chamber, a vacuum high-pressure gas quenching heating chamber, a vacuum high-pressure gas quenching cooling chamber and a subzero chamber. One unsealing and sealing door is arranged at the outer end of the material loading and unloading chamber, and a rail for enabling a material conveying cart to move is arranged in the middle corridor chamber. A first solenoid valve and a second solenoid valve are arranged on the outer wall of the material loading and unloading chamber, a third solenoid valve and a fourth solenoid valve are arranged on the outer wall of the vacuum high-pressure gas quenching cooling chamber, and a fifth solenoid valve and a sixth solenoid valve are arranged on the outer wall of the subzero chamber. A gas storage tank is connected with a liquid nitrogen valve through a second stop valve, connected with the vacuum high-pressure gas quenching cooling chamber through a first stop valve and the third solenoid valve, and connected with the subzero chamber through a check valve, an air compressor, a sucking pump and the sixth solenoid valve. The vacuum heat treatment and subzero treatment integrated machine has the advantages of saving device investment, reducing material consumption and improving the production rate and product quality.

Description

A kind of vacuum heat treatment and sub-zero treatment all-in-one

Technical field

The invention belongs to metallic substance equipment for Heating Processing field, be specifically related to a kind of vacuum heat treatment of can either doing and can do the integration apparatus of sub-zero treatment again.

Background technology

Vacuum high pressure gas quenching is a kind of Technology to metal parts material surface hardened, and it hardens evenly, is out of shape littlely, does not destroy the smooth finish of piece surface, has reduced the surface working operation after quenching, thereby has improved production efficiency, has reduced production cost.Have at present the patent of more relevant vacuum high pressure gas quenching equipment.Cryogenics is that the metallic substance process of cooling after quenching is continued, and reaches the temperature far below room temperature, impel conventional thermal treatment after existing residual austenite be further converted to martensite, improve and thinning microstructure structure.It is very fast that current domestic deep cold treatment apparatus R&D work makes progress, especially adopting up-to-date heating technique and liquid nitrogen homogenization technology, low-temperature receiver is evenly distributed, reduces temperature fluctuation, improve the technical feature aspects such as intellectuality, high precision, automatization control and obtained obvious raising.But at present we seen to workpiece carry out vacuum heat treatment and sub-zero treatment process be workpiece is quenched in high-pressure gas quenching furnace after, be generally cooled to room temperature, then workpiece is taken out from vacuum oven, then workpiece is delivered to deep cooling box and carry out sub-zero treatment.Will be through after a while in the middle of this, affect the Disposal quality of workpiece, a lot of materials are middle from vacuum heat treatment to sub-zero treatment is not allow long time transition, and this processing mode needs manual operation more, easily there is mishandle, and vacuum heat treatment needs nitrogen, sub-zero treatment needs liquid nitrogen, and two kinds of equipment need the different equipments that treatment media is provided, increase cost, waste liquid nitrogen, productivity is low, and the quality of processing workpiece is unstable.

Summary of the invention

The object of the invention is to provide a kind of vacuum heat treatment and sub-zero treatment all-in-one, and continuity and unification to sub-zero treatment after solution workpiece vacuum heat treatment provide treatment media source problem, to guarantee to process the quality of workpiece, enhance productivity, and save processing cost.

The present invention realizes like this, as shown in Figure 1, its constitutional features is in the left and right sides of chamber, columnar central gangway III, to be arranged with between two four door openings, and each door opening is provided with second, third successively, the 4th, the 5th unpacking hermatic door 5,23,22,7 is also connected with material handling chamber I, vacuum high pressure gas quenching heating chamber II, vacuum high pressure gas quenching cooling room IV, chilling chamber V respectively successively.In the outer end of material handling chamber I, the first unpacking hermatic door 1 is installed, in the III of chamber, central gangway along the track 6 being provided with on the bottom surface of axis direction for material conveying trolley 29 walking.In material handling chamber I, vacuum high pressure gas quenching heating chamber II, vacuum high pressure gas quenching cooling room IV, chilling chamber V, be separately installed with first, second, third, fourth material platform 2,24,19,8.First, second magnetic valve 3,4 is installed on the I outer wall of material handling chamber, the 3rd, the 4th magnetic valve 20,21 is installed on vacuum high pressure gas quenching cooling room IV outer wall, the 5th, the 6th magnetic valve 17,18 is installed on chilling chamber V outer wall.The connection of liquid air pipe is that gas-holder 10 is connected with liquid nitrogen container 12 by the second stopping valve 11, gas-holder 10 is connected with vacuum high pressure gas quenching cooling room IV by the first stopping valve 9, the 3rd magnetic valve 20 in proper order, gas-holder 10 is connected with chilling chamber V by check valve 14, air compressor 15, off-gas pump 16, the 6th magnetic valve 18 in proper order, liquid nitrogen container 12 is connected with chilling chamber V by the 3rd stopping valve 13, the 5th magnetic valve 17 in proper order, the first magnetic valve 3 is connected with external vacuum pump, and the 4th magnetic valve 21 is for exhaust.

Advantage of the present invention and positively effect are: 1. whole equipment adopts computer control system to control, and can enhance productivity.2. during vacuum high pressure gas quenching, heating and cooling are separately carried out, can be saved a large amount of electric energy and nitrogen.3. on chilling chamber, be furnished with nitrogen gas recovering apparatus, can reclaim nitrogen.4. the vacuum heat treatment of metal works and sub-zero treatment are combined on an equipment and are carried out, both saved equipment investment, saved materials consumption, improved again productivity, improved the quality of processing workpiece.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, the present invention is further described

Fig. 1 is the vertical view of structure of the present invention

In Fig. 2 Fig. 1, A is to view

In Fig. 3 Fig. 1, B is to view

1-the first unpacking hermatic door in figure, 2-the first material platform, 3-the first magnetic valve, 4-the second magnetic valve, 5-the second unpacking hermatic door, 6-track, 7-the 5th unpacking hermatic door, 8-the 4th material platform, 9-the first stopping valve, 10-gas-holder, 11-the second stopping valve, 12-liquid nitrogen container, 13-the 3rd stopping valve, 14-check valve, 15-air compressor, 16-off-gas pump, 17-the 5th magnetic valve, 18-the 6th magnetic valve, 19-the 3rd material platform, 20-the 3rd magnetic valve, 21-the 4th magnetic valve, 22-the 4th unpacking hermatic door, 23-the 3rd unpacking hermatic door, 24-the second material platform, 25-thermofin, 26, 26'-blower fan, 27, 27'-motor, 28-tensimeter, 29-material conveying trolley.I-material handling chamber, II-vacuum high pressure gas quenching heating chamber, chamber, III-central gangway, IV-vacuum high pressure gas quenching cooling room, V-chilling chamber.

Embodiment

As shown in Figure 1, while starting working, open the first stopping valve 9, the second stopping valve 11, the 3rd stopping valve 13, observe the tensimeter 28 on gas-holder 10, when the pressure of tensimeter demonstration reaches need of work, close the second stopping valve 11.Then by computer control, open the first unpacking hermatic door 1, with truck, need material to be processed is delivered on the first material platform 2 in the I of material handling chamber, exit truck, close subsequently the first unpacking hermatic door 1, open the second unpacking hermatic door 5, the 3rd unpacking hermatic door 23, the 4th unpacking hermatic door 22, the 5th unpacking hermatic door 7, open the first magnetic valve 3, vacuum heat treatment and sub-zero treatment all-in-one integral body are vacuumized.When vacuum tightness reaches the desired vacuum tightness of technique, automatically close the first magnetic valve 3.Start material conveying trolley 29, material is taken out from the first material platform 2, close subsequently the second unpacking hermatic door 5.Material conveying trolley 29 is sent into material on the second material platform 24 in vacuum high pressure gas quenching heating chamber II along track 6, closes subsequently the 3rd unpacking hermatic door 23.Workpiece is carried out to electrically heated, reach after processing requirement temperature, insulation for some time, open the 3rd unpacking hermatic door 23, with material conveying trolley 29, take out material, close subsequently the 3rd unpacking hermatic door 23, material conveying trolley 29 is sent into material on the 3rd material platform 19 in vacuum high pressure gas quenching cooling room IV, close subsequently the 4th unpacking hermatic door 22, open the 3rd magnetic valve 20 and pass into nitrogen from gas-holder 10, quench, the 4th magnetic valve 21 opens and closes in order to scavenge simultaneously, and after having quenched, the 3rd magnetic valve 20 cuts out.Open the 4th unpacking hermatic door 22, with material conveying trolley 29, take out material, close subsequently the 4th unpacking hermatic door 22, material conveying trolley 29 is sent into material on the 4th material platform 8 in chilling chamber V, close subsequently the 5th unpacking hermatic door 7, open the 5th magnetic valve 17 and from liquid nitrogen container 12, pass into liquid nitrogen and carry out sub-zero treatment.According to processing requirement, control the unlatching of the 5th magnetic valve 17, to guarantee that the temperature in chilling chamber V meets the demands.Liquid nitrogen is direct gasification after jet pipe ejection, utilizes gasification latent heat and low temperature nitrogen to absorb heat temperature of charge is reduced, and motor 27 drives blower fans 26 to rotate and makes air flowing in deep cooling box, impels the interior temperature of chilling chamber V even.Spent air temperture in chilling chamber V is elevated to certain value, the 5th magnetic valve 17 cuts out, the 6th magnetic valve 18 is opened, and start off-gas pump 16 nitrogen in chilling chamber V is extracted out and to be sent into air compressor 15 and be compressed into high pressure gas, then be recovered in gas-holder 10 by check valve 14, the 5th magnetic valve 17 is opened afterwards, the 6th magnetic valve 18 cuts out, off-gas pump 16, air compressor 15 quit work, and move in circles, until technique completes.After sub-zero treatment completes, automatically close the 5th magnetic valve 17, open the 5th unpacking hermatic door 7, material conveying trolley 29 takes out material, close subsequently the 5th unpacking hermatic door 7, open the second unpacking hermatic door 5, material conveying trolley 29 is sent into material on the first material platform 2 in the I of material handling chamber, close subsequently the second unpacking hermatic door 5, open the second magnetic valve 4 and allow air enter.When the pressure in the I of material handling chamber and atmospheric equilibrium, automatically close the second magnetic valve 4.Open the first unpacking hermatic door 1, with truck, take out the material of handling well, close subsequently the first unpacking hermatic door 1, if carry out the processing of second batch material, can be when first material be sent into chilling chamber V and is carried out sub-zero treatment, by computer control, open the first unpacking hermatic door 1, with truck, need second batch material to be processed is delivered on the first material platform 2 in the I of material handling chamber, exit truck, close subsequently the first unpacking hermatic door 1, open the second unpacking hermatic door 5, the 4th unpacking hermatic door 22, open the first magnetic valve 3 and vacuumize.When vacuum tightness reaches the desired vacuum tightness of technique, automatically close the first magnetic valve 3.Start material conveying trolley 29, material is taken out from the first material platform 2, close subsequently the second unpacking hermatic door 5.Material conveying trolley 29 is sent into second batch material in vacuum high pressure gas quenching heating chamber II and is heated along track 6.Second batch material after heating and thermal insulation, need to be sent second batch material into vacuum high pressure gas quenching cooling room IV with material conveying trolley 29 and quench in vacuum high-pressure heating chamber II.After second batch material has quenched in vacuum high pressure gas quenching cooling room IV, in sending into chilling chamber V, carry out before sub-zero treatment, need first first material of chilling chamber V to be sent into material handling chamber I, then second batch material could be sent into chilling chamber V and carry out sub-zero treatment.So loop, until all materials are finished dealing with.If do not carry out the material of next batch, process, need to close the first stopping valve 9, the 3rd stopping valve 13.

Claims (1)

1. vacuum heat treatment and a sub-zero treatment all-in-one, its constitutional features is in the left and right sides of chamber, columnar central gangway (III), to be arranged with between two four door openings, each door opening is separately installed with second, the 3rd, the 4th, the 5th unpacking hermatic door (5, 23, 22, 7) and respectively with material handling chamber (I), vacuum high pressure gas quenching heating chamber (II), vacuum high pressure gas quenching cooling room (IV), chilling chamber (V) is connected, the first unpacking hermatic door (1) is installed in the outer end of material handling chamber (I), in chamber, central gangway (III) along on the bottom surface of axis direction, be provided with for material conveying trolley (29) walking track (6), in material handling chamber (I), vacuum high pressure gas quenching heating chamber (II), vacuum high pressure gas quenching cooling room (IV), in chilling chamber (V), be separately installed with first, second, the 3rd, the 4th material platform (2, 24, 19, 8), on the outer wall of material handling chamber (I), be provided with first, the second magnetic valve (3, 4), on vacuum high pressure gas quenching cooling room (IV) outer wall, be provided with the 3rd, the 4th magnetic valve (20, 21), on chilling chamber (V) outer wall, be provided with the 5th, the 6th magnetic valve (17, 18), the connection of liquid air pipe is that gas-holder (10) is connected with liquid nitrogen container (12) by the second stopping valve (11), and gas-holder (10) is successively by the first stopping valve (9), the 3rd magnetic valve (20) is connected with vacuum high pressure gas quenching cooling room (IV), and gas-holder (10) is successively by check valve (14), air compressor (15), off-gas pump (16), the 6th magnetic valve (18) is connected with chilling chamber (V), and liquid nitrogen container (12) is successively by the 3rd stopping valve (13), the 5th magnetic valve (17) is connected with chilling chamber (V), and the first magnetic valve (3) is connected with external vacuum pump, and the 4th magnetic valve (21) is for exhaust.

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