CN204550667U - A kind of heating mould for induction furnace - Google Patents
A kind of heating mould for induction furnace Download PDFInfo
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- CN204550667U CN204550667U CN201520007556.3U CN201520007556U CN204550667U CN 204550667 U CN204550667 U CN 204550667U CN 201520007556 U CN201520007556 U CN 201520007556U CN 204550667 U CN204550667 U CN 204550667U
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- ruhmkorff coil
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- mould bases
- fixing mould
- heating
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Abstract
The utility model discloses a kind of heating mould for induction furnace, comprise fixing mould bases, ruhmkorff coil, guide rail and heat insulation bottom board, fixed mould is set up on heat insulation bottom board; Fixing mould bases is the insulation high-temperature-resistant cement of hollow, ruhmkorff coil is formed by the copper pipe coiling of hollow, be embedded in fixing mould bases bottom ruhmkorff coil, on the side that the ruhmkorff coil left and right sides is fixed on fixing mould bases and part passes the side of fixing mould bases, lead rail axis is to running through ruhmkorff coil, guide rail is fixed on fixing mould bases, and the vertical direction part of guide rail is embedded in fixing mould bases, and guide rail does not contact with ruhmkorff coil; Two ends of ruhmkorff coil are respectively equipped with the water inlet and water outlet that connect exterior cooling water; Guide rail hollow, two ends are the water inlet and the water outlet that connect exterior cooling water; The utility model heating is fast, and the time, fugitive rate was high, the spring steel bar after heating, and few, the oxidized rate of Decarburized layer is low, mechanical characteristic consistence is high, long service life, manufacturing processed energy-saving and environmental protection.
Description
Technical field
The utility model relates to a kind of heating mould, especially relates to a kind of heating mould for induction furnace.
Background technology
Safety tongs U-shaped spring is called for short U-shaped spring, adopt spring steel bar steel to shape, current processing process is: the shaping-> Milling Machining of spring steel plate-> blanking->-> thermal treatment-> vibrates rounding-> surface treatment; Conventional molding process adopts traditional heating and simple die its shaping process, in box-type furnace, be heated to about 750 DEG C by a collection of sawed blank (about 200) and be incubated 0.5 hour, then putting into forming mould and carry out forming processes under the pressure of oil press.Its shortcoming is heat-up time long (about 2 hours), easily causes very dark surface oxide layer and Decarburized layer; The shaping first with a collection of product was to last a slice time span about 1 hour, and will cause the zone of oxidation of front and back product in high temperature environments, decarburized layer deepness is seriously inconsistent, and this will have a strong impact on consistence and the work-ing life of the finished product mechanical characteristic; Especially for the use safety having a strong impact on elevator after elevator safety gear, shaping rear product easily blocks in a mold, and not easily take out, shaping efficiency is low; Due to the descending operation of Artificial Control oil press, cause the shaping dwell time inconsistent, the consistence of the gauge that the geometrical dimension of product is particularly very large with force value association of characteristics degree is poor; After the thermal treatment of U-shaped spring, hardness is HRC42-48, and the treatment time of vibration rounding operation need reach 24 hours, and the treatment time is long, and energy consumption is large, and plant factor is low.
Due to, the U-shaped spring of traditional technology processing, working (machining) efficiency is low, and energy consumption is large, and the consistence of mechanical characteristic is poor; Therefore need the security that the production method of the production efficiency and improvement U-shaped spring improving U-shaped spring used to improve elevator with the zone of oxidation and Decarburized layer that reduce U-shaped spring surface to the work-ing life of improving U-shaped spring, and improve the consistence of U-shaped spring thickness size and the mechanical characteristic produced.
Utility model content
In view of this, the utility model is for solving the problem, and provide a kind of heat-up time short, heat rapidly and efficiently, for the heating mould of induction furnace, the spring steel bar after heating, few, the oxidized rate of Decarburized layer is low, mechanical characteristic consistence is high, long service life.
In order to reach above-mentioned purpose of the present utility model, can be realized by following technical proposal:
A kind of manufacture method of elevator safety gear U-shaped spring, spring material is bar steel, it is characterized in that: spring steel bar heating adopts the heating mould for induction furnace to heat, U-shaped spring forming adopts the shaping oil gear oil pressure of U-shaped spring shaping, comprises following processing step:
(1) blanking
By blanking machine, bar steel is processed into the spring steel bar of designated length;
(2) spring steel bar heating
Set heat-up time and the temperature of induction furnace, spring steel bar is put into and heats on the heating mould of induction furnace;
(3) U-shaped spring forming
Adopt the shaping oil gear oil pressure of U-shaped spring shaping, will put into the forming mould of U-shaped spring from the spring steel bar after induction furnace heating, press the automatic button on the shaping oil gear controlling box of U-shaped spring, oil pressure is shaping;
(4) chamfering is vibrated
The U-shaped spring of compression moulding is put into grinding bobbing machine to vibrate together with abrasive material, to reach the fillet of regulation;
(5) Milling Machining
U-shaped spring mouth both ends hole milling and according to the thickness determination working height of U-shaped spring;
(6) U-shaped heattreatment of spring
Heat-treat U-shaped spring, quenching temperature is 835-865 DEG C, insulation 15-18 minute, and tempering temperature is 430-470 DEG C, insulation 2-3 hour, and after thermal treatment, hardness is HRC42-48;
(7) surface treatment
Electrophoresis process is carried out to the U-shaped spring after Overheating Treatment.
As preferably, in step (two), the heat-up time of induction furnace is 15-20 second, and Heating temperature is 700-750 DEG C.
As preferably, described in step (four), abrasive material is hexahedron abrasive material, U-shaped spring vibration time 5-8 hour; Described abrasive material is corundum, and hexahedron abrasive material also can with the replacement such as building stones or pebbles.
As preferably, described in step (six), quenching temperature is 840-860 DEG C, insulation 16-18 minute, and tempering temperature is 440-460 DEG C, insulation 2.5-3 hour.
Because U-shaped spring hardness after Overheating Treatment is HRC42-48, therefore the treatment time of vibration rounding operation can reach 24 hours, treatment time is long, energy consumption is large, plant factor is low, the vibration chamfering process of U-shaped spring is placed on heat treated before, vibration chamfering time can shorten about 75%, energy-conservation, efficient, improve the utilization ratio of equipment.
Improve Milling Machining technique, starting material are hot rolling bar steel, and thickness has the deviation of 0.3mm, have larger impact to U-shaped spring force value characteristic; This technique under the prerequisite that can meet height dimension, according to gauge t regulate Milling Machining time U spring height H, impact force value characteristic caused with the thickness that liquidates; Thickness t is thicker, and height H is higher.
For a heating mould for induction furnace, comprise fixing mould bases, ruhmkorff coil, guide rail and heat insulation bottom board, described fixed mould is set up on heat insulation bottom board; Described fixing mould bases is the insulation high-temperature-resistant cement of hollow, described ruhmkorff coil is formed by the copper pipe coiling of hollow, be embedded in bottom described ruhmkorff coil in fixing mould bases, on the side that the described ruhmkorff coil left and right sides is fixed on fixing mould bases and part passes the side of fixing mould bases, described lead rail axis is to running through ruhmkorff coil, described guide rail is fixed on fixing mould bases, and the vertical direction part of guide rail is embedded in fixing mould bases, and described guide rail does not contact with described ruhmkorff coil.Ruhmkorff coil and guide rail can fix and prevent from moving by such setting, can guarantee again the insulativity between guide rail and ruhmkorff coil.
As preferably, two ends of described ruhmkorff coil are respectively equipped with the first water inlet and the first water outlet that connect exterior cooling water; Such process can reduce the temperature of ruhmkorff coil, prevents ruhmkorff coil by high temperature melt, extends the work-ing life of ruhmkorff coil.
As preferably, described guide rail is the hollow guide rail that austenite material is made, and guide rail two ends are the second water inlet and the second water outlet that connect exterior cooling water; Such design can reduce the temperature of guide rail, extends the work-ing life of guide rail.
The shaping oil gear of U-shaped spring, comprise oil pressure main frame, controlling box and forming mould, described controlling box connects oil pressure main frame, described forming mould is fixed on the base of oil pressure main frame, described forming mould comprises support, base plate, patrix, counterdie, de-material slide block and de-material spring, described base plate is fixed on the base of described oil press, described support vertical is fixed on described base, described patrix is by upper flat plate, punch and upper guide composition, described punch is fixed on upper flat plate, described upper guide is fixed on the corner place of upper flat plate vertically downward, described counterdie is by shaping roller, lower guide, middle plateform, lower mould body and postive stop baffle, described middle plateform is installed on the top of described support, described lower mould body is fixed on described middle plateform, described middle plateform be provided with upper guide with the use of lower guide, the inside of described lower mould body forms the molding space of a upper opening, described lower mould body is each side provided with a shaping roller near upper edge, the right hand top of described lower mould body is provided with postive stop baffle, described middle plateform center is provided with perforation, the bottom of described de-material spring is fixed on described base plate, the top of spring through the perforation of middle plateform center be connected and fixed on described de-material slide block bottom surface, described de-material slide block is located in the molding space of lower mould body.
During U-shaped spring forming, shaping roller will rotate, the stiction of material lower surface and shaping roller when basically eliminate is shaping, stiction can be prevented the scratch of U-shaped spring, shaping roller can also play U-shaped spring forming fixed action in the left and right sides simultaneously, de-material slide block moves down together along with patrix and shaping workpiece and contacts with middle plateform and rests on middle plateform under the effect of oil press pressure, the shaping roller of the lower mould body left and right sides plays the shaping positioning action of the left and right sides to U-shaped spring forming, shapingly enter packing stage, after the pressurize of U-shaped spring forming terminates, during unloading, patrix rises with oil press, de-material spring promotes de-material slide block by shaping workpiece (U-shaped spring) ejection die, make U-shaped spring opening part higher than the top of counterdie, be convenient to take out U-shaped spring, upper die and lower die coordinate four to realize moving up and down with lower guide and make location by four upper guides, can prevent from forming dislocation variation, shaping roller and formed material almost do not have stiction, and protection product can not produce abrasion mark, de-material slide block and de-material spring ensure automatic material separator after shaping end, shaping efficiency is high, and can prevent U-shaped Spring Card on counterdie.
As preferably, be provided with high-pressure pump and PLC in described controlling box, the panel of described controlling box is provided with power knob and push button, and described PLC connection control button, described push button comprises decline button, raise button and automatic button.
Oil press both can Non-follow control, also can automatically control.Under automatic control mode, press automatic button to PLC commencing signal, oil press is by the time short circuit decline switch of setting, and oil press declines; Then disconnect decline switch, oil press stops declining, and starts pressurize; Then short circuit rising switch, oil press rises; Finally disconnect rising switch, oil press stops rising, a loop ends, waits for that next triggering signal is to start next circulation; Automatic control oil press realizes the shaping of U-shaped spring and pressurize, ensure that batch U-shaped spring forming and the consistence of dwell time, improves consistence and the shaping efficiency of spring mechanical characteristic.
As preferably, described de-material slide block is right cylinder, and described cylindrical diameter is greater than the aperture of described perforation; Described de-material slide block can also be rectangular parallelepiped, the length of the bottom surface of described rectangular parallelepiped and the wide aperture being greater than described perforation respectively; So arrange, time shaping, de-material slide block moves down together along with patrix and shaping workpiece and contacts with middle plateform and rests on middle plateform under the effect of oil press pressure, due to length and the wide aperture being greater than perforation respectively of the bottom surface of cylindrical diameter or rectangular parallelepiped, can play oil pressure shaping time to the effect of lower limit.
As preferably, upper guide is cylindrical drum, and lower guide is right cylinder.
As preferably, upper guide is right cylinder, and lower guide is circumference cylinder.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is by replacing traditional process furnace heating by the heating of spring steel bar heating induction furnace, shorten heat-up time, save the energy more environmental protection, improve working efficiency and reduce the oxidisability of spring steel bar and the generation of Decarburized layer, extend the work-ing life of U-shaped spring, the hollow structure of ruhmkorff coil is used for water flowing, the temperature of ruhmkorff coil is reduced during use, extend the work-ing life of ruhmkorff coil, guide rail hollow water through structure, reduce the temperature of guide rail during use, extend the duration of service of guide rail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model for the heating mould of induction furnace;
Fig. 2 is the sectional structure schematic diagram of the utility model for the heating mould of induction furnace;
Fig. 3 is the plan structure schematic diagram of the utility model for the heating mould of induction furnace;
Fig. 4 is the shaping oil gear of the utility model U-shaped spring;
Fig. 5 is the forming die structure schematic diagram of the shaping oil gear of the utility model U-shaped spring;
Fig. 6 is the view after the utility model forming mould being put into spring steel bar;
View when Fig. 7 is U-shaped spring forming on the utility model forming mould;
Fig. 8 is view when U-shaped spring takes off material on the utility model forming mould;
Fig. 9 be the utility model shaping after the U-shaped spring schematic diagram crossed through Milling Machining.
Embodiment
In order to make those skilled in the art can further understand feature of the present utility model and technology contents, refer to following about detailed description of the present utility model and accompanying drawing.
The elevator safety gear manufacture method of U-shaped spring, spring material is bar steel, and spring steel bar heating adopts the heating mould for induction furnace to heat, and U-shaped spring forming adopts the shaping oil gear oil pressure of U-shaped spring shaping, comprises following processing step:
(1) blanking
By blanking machine, bar steel is processed into the spring steel bar of designated length;
(2) spring steel bar heating
Set heat-up time and the temperature of induction furnace, spring steel bar is put into and heats on the heating mould of induction furnace; Induction furnace is set to 15 seconds heat-up time, and Heating temperature is set to 750 degree, is heated spring steel bar by the heating mould of induction furnace.
(3) U-shaped spring forming
Adopt the shaping oil gear oil pressure of U-shaped spring shaping, will put into the forming mould of U-shaped spring from the spring steel bar after induction furnace heating, press the automatic button on the shaping oil gear controlling box of U-shaped spring, oil pressure is shaping; The descending molding time being set oil pressure main frame by PLC is 3-5 second, and the dwell time is 2-3 second, and the up de-material time of oil pressure main frame is 3-5 second.
(4) chamfering is vibrated
The U-shaped spring of compression moulding is put into grinding bobbing machine to vibrate together with abrasive material, to reach the fillet of regulation; Select abrasive material to be corundum, time of vibration is 6 hours.
(5) Milling Machining
U-shaped spring mouth both ends hole milling and according to the thickness determination working height of U-shaped spring;
As shown in Figure 9, improve Milling Machining technique, starting material are hot rolling bar steel, and thickness has the deviation of 0.3mm, have larger impact to U-shaped spring force value characteristic; This technique under the prerequisite that can meet height dimension, according to gauge t regulate Milling Machining time U spring height H, impact force value characteristic caused with the thickness that liquidates; Thickness t is thicker, and height H is higher.
(6) U-shaped heattreatment of spring
Heat-treat U-shaped spring, quenching temperature is 850 DEG C, and be incubated 18 minutes, tempering temperature is 450 DEG C, and be incubated 2.5 hours, after thermal treatment, hardness is HRC42-48;
(7) surface treatment
Electrophoresis process is carried out to the U-shaped spring after Overheating Treatment.
As Figure 1-3, a kind of heating mould for induction furnace, comprises fixing mould bases 1, ruhmkorff coil 2, guide rail 3 and heat insulation bottom board 4, and described fixing mould bases 1 is located on heat insulation bottom board 4; Described fixing mould bases 1 is the insulation high-temperature-resistant cement of hollow, described ruhmkorff coil 2 is formed by the copper pipe coiling of hollow, 1 is embedded in fixing mould bases bottom described ruhmkorff coil 2, on the side that described ruhmkorff coil 2 left and right sides is fixed on fixing mould bases 1 and part passes the side of fixing mould bases 1, described guide rail 3 axially runs through ruhmkorff coil 2, described guide rail 3 is fixed on fixing mould bases 1, and the vertical direction part of guide rail 3 is embedded in fixing mould bases 1, and described guide rail 3 does not contact with described ruhmkorff coil 2.Ruhmkorff coil 2 and guide rail 3 can fix and prevent from moving by such setting, can guarantee again the insulativity between guide rail 3 and ruhmkorff coil 2.
As shown in Figure 3, the first water inlet 5 of two ends of ruhmkorff coil 2 is connected exterior cooling water with the first water outlet 6; During induction furnace heating, the cooling water circulation flowing in ruhmkorff coil 2, lowers the temperature to ruhmkorff coil 2, prevents high temperature melt ruhmkorff coil 2, extends the work-ing life of ruhmkorff coil 2; The hollow guide rail 3 that guide rail 3 is made for austenite material, guide rail 3 two ends are the second water inlet 7 and the second water outlet 8 connecting exterior cooling water; Such design can reduce the temperature of guide rail, extends the work-ing life of guide rail.
As illustrated in figures 4-5, the shaping oil gear of U-shaped spring, comprise oil pressure main frame 9, controlling box 10 and forming mould 11, controlling box 10 connects oil pressure main frame 9, forming mould 11 is fixed on 9 bases 12 of oil pressure main frame, forming mould 11 comprises support 13, base plate 14, patrix 15, counterdie 16, de-material slide block 17 and de-material spring 18, base plate 14 is fixed on the base 12 of oil press, support 13 is vertically fixed on base 12, patrix 15 is by upper flat plate 15-1, punch 15-2 and upper guide 15-3 forms, punch 15-2 is fixed on upper flat plate 15-1, upper guide 15-3 is fixed on the corner place of upper flat plate 15-1 vertically downward, have four, counterdie 16 is by shaping roller 16-1, lower guide 16-2, middle plateform 16-3, lower mould body 16-4 and postive stop baffle 16-5, middle plateform 16-3 is installed on the top of support 13, lower mould body 16-4 is fixed on middle plateform 16-3, middle plateform 16-3 be provided with upper guide 15-3 with the use of lower guide 16-2, the inside of lower mould body 16-4 forms the molding space of a upper opening, lower mould body 16-4 is each side provided with a shaping roller 16-1 near upper edge, the right hand top of lower mould body 16-4 is provided with postive stop baffle 16-5, middle plateform 16-3 center is provided with perforation 16-3-1, the bottom of de-material spring 18 is fixed on base plate 14, the top of spring through the perforation 16-3-1 of middle plateform 16-3 center be connected and fixed on de-material slide block 17 bottom surface, de-material slide block 17 is located in the molding space of lower mould body 16-4.
As shown in Figure 4, high-pressure pump (not shown) and PLC (not shown) is provided with in controlling box 10, the panel of controlling box 10 is provided with power knob 10-1 and push button 10-2, described PLC connection control button, push button comprises decline button, raise button and automatic button.
As shown in Figure 6, spring steel bar is put on the shaping roller 16-1 of forming mould 11 heat taking-up from induction furnace after, and postive stop baffle 16-5 carries out spacing to spring steel bar 19.
As shown in Figure 5, de-material slide block 17 is bored a hole for diameter is greater than the right cylinder in 16-3-1 aperture, and upper guide 15-3 is cylindrical drum, and lower guide 16-2 is right cylinder.
As Fig. 4, 6, 7, shown in 8, oil press both can Non-follow control, also can automatically control, adopt automatic control mode under normal circumstances, press automatic button to PLC commencing signal, oil press is by the time short circuit decline switch set in PLC, oil pressure main frame 9 move down be pushed into mould 11 patrix 15 entirety to pressing down, punch 15-2 promotes spring steel bar 19, shaping roller 16-1 rotates, spring steel bar 19 moves down and enters, spring steel bar 19 is driven to enter the molding space of lower mould body 16-4 downwards, spring steel bar 19 expects slide block 17 after contacting under the effect of oil press pressure with de-, along with patrix 15 and spring steel bar 19 move down together, compression is de-expects that spring 18 is when resting on middle plateform 16-3 after spring steel bar 19 contacts with middle plateform 16-3 to de-material slide block 17, now automatically disconnect decline switch, oil press stops declining, the shaping roller 16-1 of the left and right sides of lower mould body 16-4 plays the shaping positioning action of the left and right sides to U-shaped spring forming, shapingly enter packing stage, after pressurize terminates, then short circuit rising switch, patrix 15 rises with oil pressure main frame 9, de-material spring 18 promotes de-material slide block 17 by shaping workpiece (U-shaped spring) 19-1 ejection die, make U-shaped spring 19-1 opening part higher than the top of counterdie 16, be convenient to take out U-shaped spring 19-1 loop ends, wait for that next triggering signal is to start next circulation, automatic control oil press achieves the shaping and pressurize of U-shaped spring 19-1, ensure that batch U-shaped spring forming and the consistence of dwell time, improves consistence and the shaping efficiency of spring mechanical characteristic.Patrix 15 and counterdie 16 coordinate four to follow lower guide 16-2 to realize the location moved up and down by four upper guide 15-3, can prevent from forming dislocation variation; Shaping roller 16-1 and formed material (spring steel bar 19) almost do not have stiction, and protection product can not produce abrasion mark; De-material slide block 17 and de-material spring 18 ensure that automatic material separator after shaping end; Shaping efficiency is high, and U-shaped spring 19-1 can be prevented to be stuck on counterdie 16.
Below by reference to the accompanying drawings the utility model is described in further detail, but the utility model is not limited to above-described embodiment, in the ken that those having ordinary skill in the art possesses, can also make a variety of changes under the prerequisite not departing from aim of the present utility model, all in like manner be included in scope of the present utility model.
Claims (3)
1. for a heating mould for induction furnace, it is characterized in that: comprise fixing mould bases, ruhmkorff coil, guide rail and heat insulation bottom board, described fixed mould is set up on heat insulation bottom board; Described fixing mould bases is the insulation high-temperature-resistant cement of hollow, described ruhmkorff coil is formed by the copper pipe coiling of hollow, be embedded in bottom described ruhmkorff coil in fixing mould bases, on the side that the described ruhmkorff coil left and right sides is fixed on fixing mould bases and part passes the side of fixing mould bases, described lead rail axis is to running through ruhmkorff coil, described guide rail is fixed on fixing mould bases, and the vertical direction part of guide rail is embedded in fixing mould bases, and described guide rail does not contact with described ruhmkorff coil.
2. as claimed in claim 1 for the heating mould of induction furnace, it is characterized in that: two ends of described ruhmkorff coil are respectively equipped with the first water inlet and the first water outlet that connect exterior cooling water.
3. as claimed in claim 1 for the heating mould of induction furnace, it is characterized in that: described guide rail is the hollow guide rail that austenite material is made, guide rail two ends are the second water inlet and the second water outlet that connect exterior cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520007556.3U CN204550667U (en) | 2015-01-05 | 2015-01-05 | A kind of heating mould for induction furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520007556.3U CN204550667U (en) | 2015-01-05 | 2015-01-05 | A kind of heating mould for induction furnace |
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| CN204550667U true CN204550667U (en) | 2015-08-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108747217A (en) * | 2018-06-02 | 2018-11-06 | 江苏翔鹰五金弹簧有限公司 | A kind of manufacturing method and device of elevator safety gear U-shaped spring |
-
2015
- 2015-01-05 CN CN201520007556.3U patent/CN204550667U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108747217A (en) * | 2018-06-02 | 2018-11-06 | 江苏翔鹰五金弹簧有限公司 | A kind of manufacturing method and device of elevator safety gear U-shaped spring |
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