CN104493445A - Manufacturing method of U-shaped spring for elevator security pincers - Google Patents
Manufacturing method of U-shaped spring for elevator security pincers Download PDFInfo
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- CN104493445A CN104493445A CN201510005730.5A CN201510005730A CN104493445A CN 104493445 A CN104493445 A CN 104493445A CN 201510005730 A CN201510005730 A CN 201510005730A CN 104493445 A CN104493445 A CN 104493445A
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- shaped spring
- spring
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- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
Abstract
The invention discloses a manufacturing method of a U-shaped spring for elevator security pincers. The manufacturing method is that a spring steel bar is heated through a heating die applied to an induction furnace, and the U-shaped spring is formed under oil pressure effect through a forming oil pressure device for the U-shaped spring. The manufacturing method comprises the steps of (1) blanking, namely, processing bar steel into a spring steel bar with the specified length through a blanking machine; (2) heating the spring steel bar, namely heating the spring steel bar through the heating die applied to the induction furnace; (3) forming the U-shaped spring, namely, forming under the oil pressure through the forming oil pressure device for the U-shaped spring; (4) vibrating and chamfering, namely, vibrating the pressed and formed U-shaped spring through a grinding vibration machine together with grinding materials; (5) milling; (6) thermally processing the U-shaped spring, quenching and tempering; (7) performing surface finish. The U-shaped spring manufactured by the method has the advantages that decarburized layers of the spring are minimized, the oxidizing rate is low, the consistency of the mechanical properties is high, the service life is long, the spring is difficulty clamped on the forming die during discharging, and the manufacturing is energy saving and environmentally friendly.
Description
Technical field
The present invention relates to a kind of manufacture method of safety tongs U-shaped spring, safety tongs U-shaped spring, be applied to that load is comparatively large and deflection is less, require the larger occasion that need apply symmetrical pressure of spring rate, belong to method for manufacturing spring technical field, especially relate to a kind of manufacture method of elevator safety gear U-shaped spring.
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->-> heat treatment-> vibrates rounding-> surface treatment; Conventional molding process adopts traditional heating and simple die its shaping process, in batch-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 mould and carry out forming processes under the pressure of hydraulic press.Its shortcoming is heat 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 oxide layer of front and back product in high temperature environments, decarburized layer deepness is seriously inconsistent, and this will have a strong impact on uniformity and the service life of final products 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 hydraulic press, cause the shaping dwell time inconsistent, the uniformity of the gauge that the physical dimension of product is particularly very large with force value association of characteristics degree is poor; After the heat treatment of U-shaped spring, hardness is HRC42-48, and the processing time of vibration rounding operation need reach 24 hours, and the processing time is long, and energy resource consumption is large, and utilization rate of equipment and installations is low.
Due to, the U-shaped spring of traditional handicraft processing, working (machining) efficiency is low, and energy consumption is large, and the uniformity 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 oxide layer and decarburized layer that reduce U-shaped spring surface to the service life of improving U-shaped spring, and improve the uniformity of U-shaped spring thickness size and the mechanical characteristic produced.
Summary of the invention
In view of this, the present invention is for solving the problem, thering is provided a kind of manufactures simply, efficiency is high, and spring steel bar heating is quick, the time is short, and U-shaped spring decarburized layer is few, oxidized rate is low, mechanical characteristic uniformity is high, energy-conserving and environment-protective during manufacture, improves the manufacture method of a kind of elevator safety gear U-shaped spring in spring service life.
In order to reach above-mentioned purpose of the present invention, 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 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 mould of U-shaped spring from the spring steel bar after induction furnace heating, press the automatic button on the shaping oil gear control cabinet of U-shaped spring, oil pressure is shaping;
(4) chamfering is vibrated
Compressing U-shaped spring 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, hardening heat is 835-865 DEG C, insulation 15-18 minute, and temperature is 430-470 DEG C, insulation 2-3 hour, and after heat 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 time of induction furnace is 15-20 second, and heating-up 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 cobblestone.
As preferably, described in step (six), hardening heat is 840-860 DEG C, insulation 16-18 minute, and temperature is 440-460 DEG C, insulation 2.5-3 hour.
Because U-shaped spring hardness after Overheating Treatment is HRC42-48, therefore the processing time of vibration rounding operation can reach 24 hours, processing time is long, energy resource consumption is large, utilization rate of equipment and installations 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 rate of equipment.
Improve Milling Machining technique, raw 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, induction coil, guide rail and heat insulation bottom board, described fixed die is set up on heat insulation bottom board; Described fixing mould bases is the insulation high-temperature-resistant cement of hollow, described induction coil is formed by the copper pipe coiling of hollow, be embedded in bottom described induction coil in fixing mould bases, on the side that the described induction 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 induction 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 induction coil.Induction coil and guide rail can fix and prevent from moving by such setting, can guarantee again the insulating properties between guide rail and induction coil.
As preferably, two ends of described induction coil are respectively equipped with the first water inlet and the first delivery port that connect external refrigeration water; Such process can reduce the temperature of induction coil, prevents induction coil by high temperature melt, extends the service life of induction 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 delivery port that connect external refrigeration water; Such design can reduce the temperature of guide rail, extends the service life of guide rail.
The shaping oil gear of U-shaped spring, comprise oil pressure main frame, control cabinet and mould, described control cabinet connects oil pressure main frame, described mould is fixed on the base of oil pressure main frame, described 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 hydraulic 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 static friction of material lower surface and shaping roller when basic elimination is shaping, static friction can be prevented the scratch of U-shaped spring, shaping roller can also play U-shaped spring forming fixation 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 hydraulic 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 hydraulic 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 moulding material almost do not have static friction, 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 control cabinet, the panel of described control cabinet is provided with power knob and control button, and described PLC connection control button, described control button comprises decline button, raise button and automatic button.
Hydraulic press both can Non-follow control, also can automatically control.Under automatic control mode, press automatic button to PLC commencing signal, hydraulic press is by the time short circuit decline switch of setting, and hydraulic press declines; Then disconnect decline switch, hydraulic press stops declining, and starts pressurize; Then short circuit rising switch, hydraulic press rises; Finally disconnect rising switch, hydraulic press stops rising, and a circulation terminates, and waits for that next triggering signal is to start next circulation; Automatic control hydraulic press realizes the shaping of U-shaped spring and pressurize, ensure that batch U-shaped spring forming and the uniformity of dwell time, improves uniformity and the shaping efficiency of spring mechanical characteristic.
As preferably, described de-material slide block is cylinder, and described cylindrical diameter is greater than the aperture of described perforation; Described de-material slide block can also be cuboid, the length of the bottom surface of described cuboid 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 hydraulic press pressure, due to length and the wide aperture being greater than perforation respectively of the bottom surface of cylindrical diameter or cuboid, can play oil pressure shaping time to the effect of lower limit.
As preferably, upper guide is cylindrical drum, and lower guide is cylinder.
As preferably, upper guide is cylinder, and lower guide is circumference cylinder.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention is by replacing traditional heating furnace heating by the heating of spring steel bar heating induction furnace, shorten the heat time, save the energy more environmental protection, improve operating efficiency and reduce the oxidizability of spring steel bar and the generation of decarburized layer, extend the service life of U-shaped spring;
2, use when U-shaped spring shaping the shaping oil gear of U-shaped spring realize to the automatic control of the shaping of U-shaped spring and pressurize improve operating efficiency also improve simultaneously with batch shaping U-shaped spring the uniformity of dwell time, reduce the error of manual operation, guarantee that the uniformity of thickness reduces the error with batch U-shaped spring mechanical characteristic;
3, during U-shaped spring forming, shaping roller will rotate, the static friction of material lower surface and shaping roller when basic elimination is shaping, static friction can be prevented the scratch of U-shaped spring, shaping roller can also play U-shaped spring forming fixation in the left and right sides simultaneously, during unloading, patrix rises with hydraulic press, and 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 move up and down with lower guide by four upper guides, can prevent from forming dislocation variation; Shaping roller and moulding material almost do not have static friction, 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;
4, by changing the manufacturing process of U-shaped spring, before vibration rounding operation is placed in heat treatment step, before heat treatment, U spring hardness is significantly less than hardness after heat treatment, therefore time needed for vibration rounding comparatively will shorten 75% after heat treatment, reduce energy resource consumption, improve operating efficiency and the utilization rate of equipment and installations of vibration chamfering.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for the heating mould of induction furnace;
Fig. 2 is the sectional structure schematic diagram of the present invention for the heating mould of induction furnace;
Fig. 3 is the plan structure schematic diagram of the present invention for the heating mould of induction furnace;
Fig. 4 is the shaping oil gear of U-shaped spring of the present invention;
Fig. 5 is the forming die structure schematic diagram of the shaping oil gear of U-shaped spring of the present invention;
Fig. 6 is the view after mould of the present invention being put into spring steel bar;
View when Fig. 7 is U-shaped spring forming on mould of the present invention;
Fig. 8 is view when U-shaped spring takes off material on mould of the present invention;
Fig. 9 be the present invention shaping after the U-shaped spring schematic diagram crossed through Milling Machining.
Detailed description of the invention
In order to make those skilled in the art can further understand feature of the present invention and technology contents, refer to following detailed description for the present invention 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 time and the temperature of induction furnace, spring steel bar is put into and heats on the heating mould of induction furnace; The induction furnace heat time is set to 15 seconds, and heating-up 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 mould of U-shaped spring from the spring steel bar after induction furnace heating, press the automatic button on the shaping oil gear control cabinet 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
Compressing U-shaped spring 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, raw 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, hardening heat is 850 DEG C, and be incubated 18 minutes, temperature is 450 DEG C, and be incubated 2.5 hours, after heat 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, induction 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 induction coil 2 is formed by the copper pipe coiling of hollow, 1 is embedded in fixing mould bases bottom described induction coil 2, on the side that described induction 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 induction 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 induction coil 2.Induction coil 2 and guide rail 3 can fix and prevent from moving by such setting, can guarantee again the insulating properties between guide rail 3 and induction coil 2.
As shown in Figure 3, the first water inlet 5 of two ends of induction coil 2 is connected external refrigeration water with the first delivery port 6; During induction furnace heating, the cooling water circulation flowing in induction coil 2, lowers the temperature to induction coil 2, prevents high temperature melt induction coil 2, extend the service life of induction 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 delivery port 8 connecting external refrigeration water; Such design can reduce the temperature of guide rail, extends the service life of guide rail.
As illustrated in figures 4-5, the shaping oil gear of U-shaped spring, comprise oil pressure main frame 9, control cabinet 10 and mould 11, control cabinet 10 connects oil pressure main frame 9, mould 11 is fixed on 9 bases 12 of oil pressure main frame, 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 hydraulic 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 control cabinet 10, the panel of control cabinet 10 is provided with power knob 10-1 and control button 10-2, described PLC connection control button, control 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 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 cylinder in 16-3-1 aperture, and upper guide 15-3 is cylindrical drum, and lower guide 16-2 is cylinder.
As Fig. 4, 6, 7, shown in 8, hydraulic press both can Non-follow control, also can automatically control, adopt automatic control mode under normal circumstances, press automatic button to PLC commencing signal, hydraulic 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 hydraulic 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, hydraulic 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 circulation terminate, wait for that next triggering signal is to start next circulation, automatic control hydraulic press achieves the shaping and pressurize of U-shaped spring 19-1, ensure that batch U-shaped spring forming and the uniformity of dwell time, improves uniformity 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 moulding material (spring steel bar 19) almost do not have static friction, 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 be described in further detail invention has been by reference to the accompanying drawings, but the invention is not restricted 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 invention, all in like manner within the scope of the present invention.
Claims (10)
1. the elevator safety gear manufacture method of 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 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 mould of U-shaped spring from the spring steel bar after induction furnace heating, press the automatic button on the shaping oil gear control cabinet of U-shaped spring, oil pressure is shaping;
(4) chamfering is vibrated
Compressing U-shaped spring is put into grinding bobbing machine to vibrate together with abrasive material, to reach the fillet of regulation;
(5) Milling Machining
At the both ends hole milling of U-shaped spring mouth, and according to the thickness determination working height of U-shaped spring;
(6) U-shaped heattreatment of spring
Heat-treat U-shaped spring, hardening heat is 835-865 DEG C, insulation 15-18 minute, and temperature is 430-470 DEG C, insulation 2-3 hour, and after heat treatment, hardness is HRC42-48;
(7) surface treatment
Electrophoresis process is carried out to the U-shaped spring after Overheating Treatment.
2. the elevator safety gear manufacture method of U-shaped spring as claimed in claim 1, is characterized in that: in step (two), the heat time of induction furnace is 15-20 second, and heating-up temperature is 700-750 DEG C.
3. the elevator safety gear manufacture method of U-shaped spring as claimed in claim 1, it is characterized in that: described in step (four), abrasive material is hexahedron abrasive material, described abrasive material is corundum, U-shaped spring vibration time 5-8 hour.
4. the elevator safety gear manufacture method of U-shaped spring as claimed in claim 1, is characterized in that: described in step (six), hardening heat is 840-860 DEG C, insulation 16-18 minute, and temperature is 440-460 DEG C, insulation 2.5-3 hour.
5., for realizing the heating mould for induction furnace of the method for Claims 1-4, it is characterized in that: comprise fixing mould bases, induction coil, guide rail and heat insulation bottom board, described fixed die is set up on heat insulation bottom board; Described fixing mould bases is the insulation high-temperature-resistant cement of hollow, described induction coil is formed by the copper pipe coiling of hollow, be embedded in bottom described induction coil in fixing mould bases, on the side that the described induction 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 induction 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 induction coil.
6. as claimed in claim 5 for the mould of induction furnace heating, it is characterized in that: two ends of described induction coil are respectively equipped with the first water inlet and the first delivery port that connect external refrigeration water.
7. as claimed in claim 5 for the mould of induction furnace heating, 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 delivery port that connect external refrigeration water.
8. one kind for realizing the shaping oil gear of the U-shaped spring of the method for Claims 1-4, comprise oil pressure main frame, control cabinet and mould, it is characterized in that: described control cabinet connects oil pressure main frame, described mould is fixed on the base of oil pressure main frame, described 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 hydraulic 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 is connected and fixed on the bottom surface of described de-material slide block through the perforation of middle plateform center, described de-material slide block is located in the molding space of lower mould body.
9. the shaping oil gear of U-shaped spring as claimed in claim 8, it is characterized in that: in described control cabinet, be provided with high-pressure pump and PLC, the panel of described control cabinet is provided with power knob and control button, described PLC connection control button, described control button comprises decline button, raise button and automatic button.
10. the shaping oil gear of U-shaped spring as claimed in claim 8, is characterized in that: described de-material slide block is cylinder, and described cylindrical diameter is greater than the aperture of described perforation; Described de-material slide block can also be cuboid, the length of the bottom surface of described cuboid and the wide aperture being greater than described perforation respectively.
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| CN201510005730.5A CN104493445B (en) | 2015-01-05 | 2015-01-05 | Manufacturing method and device of U-shaped spring for elevator security pincers |
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| CN201510005730.5A CN104493445B (en) | 2015-01-05 | 2015-01-05 | Manufacturing method and device of U-shaped spring for elevator security pincers |
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Cited By (2)
| 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 |
| US10927915B2 (en) | 2017-12-15 | 2021-02-23 | Otis Elevator Company | Spring useful for elevator safety device |
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| CN101058143A (en) * | 2007-06-06 | 2007-10-24 | 上海核工碟形弹簧制造有限公司 | Method for manufacturing wave shaped spring |
| CN101125402A (en) * | 2007-10-10 | 2008-02-20 | 大连弹簧有限公司 | Method for processing heat coiling spring whose spring wire diameter is 90 millimeter |
| CN101642868A (en) * | 2009-07-30 | 2010-02-10 | 杭州钱江弹簧有限公司 | Technic for processing suspension spring |
| CN102501009A (en) * | 2011-10-27 | 2012-06-20 | 杭州富春弹簧有限公司 | Processing technology of arc-shaped spring |
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| US4568394A (en) * | 1984-07-02 | 1986-02-04 | Laclede Steel Company | Method of manufacturing springs, including the production of wire therefor |
| CN101058143A (en) * | 2007-06-06 | 2007-10-24 | 上海核工碟形弹簧制造有限公司 | Method for manufacturing wave shaped spring |
| CN101125402A (en) * | 2007-10-10 | 2008-02-20 | 大连弹簧有限公司 | Method for processing heat coiling spring whose spring wire diameter is 90 millimeter |
| CN101642868A (en) * | 2009-07-30 | 2010-02-10 | 杭州钱江弹簧有限公司 | Technic for processing suspension spring |
| CN102501009A (en) * | 2011-10-27 | 2012-06-20 | 杭州富春弹簧有限公司 | Processing technology of arc-shaped spring |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10927915B2 (en) | 2017-12-15 | 2021-02-23 | Otis Elevator Company | Spring useful for elevator safety device |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104493445B (en) | 2017-02-22 |
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