Method for production of high-loaded compression springs

FIELD: technological processes.

SUBSTANCE: method includes coiling of spring from polished or strengthened wire with pitch that exceeds pitch of finished spring, thermal treatment, shotcasting riveting, thermosetting or hardening. Afterwards or simultaneously with thermosetting, spring plastic strengthening is carried out by its compression by axial load, which makes (10÷300)F3, where F3 is spring force at its maximum deformation. Prior to spring coiling, high-temperature or low-temperature thermomechanical strengthening of wire is carried out, and spring compression by axial load is done in process of its heating up to tempering or quenching temperature.

EFFECT: improved operational properties of spring.

4 cl

 

The invention relates to a technology for manufacturing a helical compression spring, including high-load operating at high temperatures with power contact or collision orbits.

When the springs are under high temperatures, there is sludge and loss of performance properties. Therefore, such spring wire is used with low temperature [1] or high-temperature thermomechanical hardening, which is based on the combination of operations of hot metal forming (rolling, drawing, bending or wrapped at small radii) followed by immediate quenching with regulated temperature and time settings. After high-temperature thermomechanical processing provides increased strength, increased fatigue strength (including low-cycle), as well as fracture resistance, ductility and impact strength, temperature decreases hladolomkosti, virtually eliminating reversible temper embrittlement and reduced hydrogen embrittlement. In addition, the material of the wire may be subjected once or twice, the electroslag remelting, which reduces the size of nonmetallic inclusions and increases stamina springs. In the manufacture of wire to remove the defects of the outer surface can apply what I turning of the cutting head, grinding, polishing.

But when working with power contact or collision of coils made of such high quality wire springs prematurely lose their properties due to the arising of contact reactions in the contact zone of coils and precipitation, which is a disadvantage.

Therefore, to improve the quality of these springs it is recommended to use plastic surgery hardening by application of axial load value (10÷300)F3[2], so that tension is the change in the mechanical properties of the material and improve the indicators of the strength properties. The hardening process is accompanied by structural changes in the deformed layer with a corresponding increase its hardness and strength, the formation of favorable residual stresses of compression and the formation of a qualitatively new macro - and microgeometry of the surface.

A known method of manufacturing springs in U.S. Pat. RU # 2275269 C1 [3], namely, that after the winding of the spring with a step above the step, ready to spring, they produce heat treatment and shot blasting work hardening, thermocalc or senegalian spring, after or simultaneously produce plastic hardening it turns compression load component (10÷300)F3where F3- spring force at maximum deformation. Plastic hardening coils of the spring on Westlaw by the application thereto of the initial load, providing the minimum permissible draught, and the subsequent application of repeated loads, increased in proportion to the ratio of the desired precipitation to precipitate from the application of the initial load [6]. When this load to compress the spring when the plastic hardening can be applied vibration [7]. With increased requirements to the accuracy of the power parameters of the spring after winding produce editing and polishing the ends with the removal of chamfers on them. As the initial load when the plastic hardening of the coils of the spring, and the magnitude of the step when wrapped under refacing is known and sufficiently lit [4, 5] in the literature and do not cause difficulties.

Further increase performance properties can be achieved through plastic hardening spring by the application of axial loads (10÷300)F3heated to the tempering temperature or to the temperature quenching or without heating, made of pre-exposed to low-temperature or high-temperature thermomechanical hardening spring wire.

The proposed technological process of manufacturing of compression springs made of wire, including polished or hardened, includes a low-temperature process or vysokotemperaturnogo thermomechanical hardening of the wire winding spring step previews the ready springs, heat treatment and shot blasting work hardening, thermocalc or senegalian, after or simultaneously with termousadki produce plastic hardening spring by compressing heated to the tempering temperature or to the temperature quenching or without heating of the axial load component (10÷300)F3where F3- spring force at maximum deformation. When it comes to the first spring exerting a load, providing the minimum allowable draught when the spring is in the product, and then applied again, increased in proportion to the ratio of the desired precipitation to precipitate from the app first loads. The load can be applied vibration. With increased requirements to the accuracy of the power parameters of the spring after winding produce editing and polishing the ends with the removal of chamfers on them.

The method is as follows. Wire, including polished or hardened, subjected to low-temperature or high-temperature thermomechanical hardening. Then the wire serves to spring-coiling machine, and wound the spring with a step above the step, ready to spring. Produce heat treatment of springs. After 100% of romcontrol and washing carried out the blast hardening. After thermocalc or samevolume produce plastic hardening spring by compressing its axial load is (10÷ 300)F3when heated to the tempering temperature or to the temperature quenching or without heating to achieve the desired height. Thermocalc and plastic hardening coils can be carried out simultaneously. Then measure the parameters of the spring. The last operation of a protective coating, preservation and packaging. In the manufacture of precise power settings springs after winding their rule and grind the ends with the removal of chamfers on them.

Sources of information

1. Ruhstadt A.G. spring steel and alloys / M, metallurgy, 1982.

2. Tabanco, Y.M., Zemljanushnov POSTGRADUATE using the contact samevolume springs // proceedings of the Tula state University. Series "Mechanics of deformable solids and processing of metals by pressure". - 2006. - Issue 1. - S-255.

3. Patent RU No. 2275269 C1 IPC B21F 35/04, C21D 9/02, 2006.

4. Tabanco, Y.M. problems of high-speed production of springs and their solutions. The monograph. - Stavropol: OOO "the World of data", 2007, - 152 C.

5. Zemljanushnov POSTGRADUATE Calculation of helical compression springs at the contact senegalian. The monograph. - Stavropol: "Agrus", 2008, 136 S.

6. USSR author's certificate 554915, MCL B21f 35/00, 1975.

7. USSR author's certificate 580474, MCL G01M 13/00, B21f 35/00, 1976.

1. A method of manufacturing compression springs, sanded or hardened wire comprising the winding p. the dinners with step exceeding the ready springs, heat treatment, shot blasting work hardening, thermocalc or senegalian, after or simultaneously with termousadki produce plastic hardening spring by compressing the axial load component (10÷300)F3where F3- force of the spring at its maximum deformation, characterized in that before the winding of the spring carry out high-temperature or low-temperature thermomechanical hardening of the wire, and the spring compression axial load produced when it is heated to the tempering temperature or to the quenching temperature.

2. The method according to claim 1, characterized in that when the plastic hardening first applied axial load, providing the minimum allowable draught of spring when working in the product, and then re-load, increased in proportion to the ratio of the desired precipitation to precipitate from the application of the initial load.

3. The method according to claim 1. or 2, characterized in that after the winding of the spring produces its editing and polishing the ends with the removal of chamfers on them to increase the power parameters of the spring.

4. The method according to claim 1 or 2, characterized in that the axial load is applied vibration.



 

Same patents:

FIELD: technological processes.

SUBSTANCE: bar is heated up to the temperature that provides homogenisation of steel high-temperature phase. Then spring is wound from bar at its heating temperature. At that spring is subjected to turn-by-turn tempering. Tempering of every turn is carried out after its winding and after-winding ageing in time sufficient for steel polygonisation for complication of recrystallisation rearranging of its structure. Final thermal treatment of spring is carried out by means of its tempering.

EFFECT: higher strength and operational durability of produced spring.

FIELD: manufacturing and testing of spring, possible usage in industrial branches, manufacturing and using springs: mechanical engineering, aviation engineering, automobile engineering, tool-making industry, etc.

SUBSTANCE: device for contact predeformation of springs contains lower immobile plate and lower moving plate, mounted on which with possible re-mounting along outer diameter of spring are guiding supports for same. Spring is positioned between lower and upper inserts, on end surfaces of which screw surfaces are made, repeating profile of edge coils of spring. Inserts have stops, lower insert being positioned on lower moving plate between re-mountable guiding supports, and spring being mounted so that it is in contact by edge coils with screw surfaces of inserts and abuts by end of edge coils against stops of inserts. Upper insert is made with ball surface, interacting with ball surface of puncheon, held on lower immobile plate are guiding bars and stops, limiting edge positions of lower moving plate, which is provided with mechanism for its movement into working zone under the puncheon and backwards.

EFFECT: increased labor productivity during predeformation of springs and during adjustment of device for predeformation of springs with different sizes.

4 dwg

FIELD: manufacture of jewelry articles, possibly manufacture of gold-alloy small springs of locks of snap hooks in jewelry industry.

SUBSTANCE: method comprises steps of winding from wire prepared by deforming alloy at several stage with intermediate annealing between said stages small spring; at last stage deforming alloy by drawing at total reduction degree exceeding 85% but less than 95%. Preferably drawing of wire is started from initial diameter of wire din = 1mm till final diameter df = 0.35 mm for 13 passes at total reduction degree 87.3%. Spring is made of gold alloy with purity 385.

EFFECT: enhanced elastic properties of spring, improved manufacturing process for realizing the method.

3 cl, 1 ex

FIELD: manufacture of helical compression springs operating at impingement of their turns in condition of elevated temperatures.

SUBSTANCE: after coiling spring with pitch exceeding pitch of ready spring, the last is subjected to heat treatment and shot-blast hardening. Then spring is compressed by action of axial load consisting of 10 - 300 F3 where F3 - spring force at maximum deformation. It is possible to perform secondary compression of spring by action of load increased in proportion to relation of target camber to camber value caused by first load. Spring may be subjected to action of vibration loads. In order to satisfy high demands made to force parameters of spring the last is dressed after twisting and ends of spring are ground and chamfered.

EFFECT: possibility for making springs with accurate and stable in time elastic characteristics.

4 cl

FIELD: manufacture of helical compression springs operating at impingement of their turns in condition of elevated temperatures.

SUBSTANCE: after coiling spring with pitch more than that of ready spring, the last is subjected to heat treatment and shot-blast hardening. After thermal compression and scragging spring or simultaneously with said operations, turns of spring are subjected to plastic strengthening. In order to realize it, spring is compressed by action of load consisting of 10 - 300 F3 where F3 - spring force at maximum deformation.

EFFECT: possibility for making springs with improved dynamic strength and with accurate stable in time elastic characteristics.

4 cl

FIELD: manufacture of jewelry articles, possibly in jewelry industry at making small springs of rod type locks of gold alloys.

SUBSTANCE: method comprises steps of forming wire of gold alloy by deforming during several stages at intermediate annealing procedures between said stages; at last stage of wire forming deforming alloy by drawing it at total reduction degree 65 - 85%; then winding spring of formed wire. In preferable variant of invention last stage of drawing is realized during eight passes at total reduction degree 77.8%. The most effective method of forming springs is realized at using gold of purity degree 585.

EFFECT: enhanced manufacturing effectiveness, improved quality of articles due to their enhanced elastic properties.

3 cl, 1 ex

FIELD: making and testing springs.

SUBSTANCE: device comprises punch with ball surface, which is in a contact with the ball surface of the top insert, bottom insert mounted on the bottom unmovable plate, and screw surfaces with stop provided on both of the inserts. The screw surfaces copy the profile of the end turns of the spring. The bottom unmovable plate is provided with rectangular guiding supports, which are rearranged over the outer diameter of the spring. The rectangular guiding supports are secured to the bottom unmovable plate by means of radial T-shaped slots made in the plate.

EFFECT: simplified design.

2 dwg

FIELD: making springs.

SUBSTANCE: device comprises unmovable plate, race for receiving spring, punch with a ball surface which is in a contact with the ball surface of the top insert, bottom insert mounted on the bottom plate, and screw surfaces with a stop made on the both inserts, which copy the profile of the end turns of the spring. The bottom unmovable plate is provided with stops and L-shaped guiding planks which are in a contact with the answering projections of the race and mechanism for moving the race from the setting zone and hollow of the spring to the working zone under the punch and back.

EFFECT: enhanced convenience and safety.

2 dwg

FIELD: manufacture of springs, possibly for furniture, particularly manufacture of springy mattresses for soft furniture.

SUBSTANCE: method comprises steps of feeding round cross section wire; forming and binding knots on supporting turns due to twisting wire end under predetermined pressure around supporting turn; before forming spring blank, imparting to wire out-off-round cross section or making spring blank from wire having out-off-round cross section. When wire end portion is twisted around supporting turn in contact zone of twisted wire and wire of supporting turn recesses are formed on portions of supporting turn wire having positive deflection from out-off-roundness due to creation of pressure exceeding preset value. Twisted wire is pressed-in to said recesses.

EFFECT: enhanced strength of knots, increased useful time period of spring, operational reliability of articles.

2 cl

FIELD: medical technique.

SUBSTANCE: apparatus includes base supporting guides and carriage mounted with possibility of motion along guides. Rotary platform is mounted on base behind horizontal guides of carriage. On one edge of platform there is opening in which vertical shaping pin is arranged. Said pin is secured to base. On other edge of platform there is indicator of platform rotation angle. Guiding tube is mounted between said edges and pressing spring if arranged in parallel relative to said tube with possibility of axial motion. Adjusting and pressing screws are mounted respectively at both ends of said spring. Carriage includes clamping mechanism and handle moving carriage on guides. Member for controlled limitation of horizontal motion of carriage is mounted on base between horizontal guides of carriage.

EFFECT: possibility for simplified forming of curvilinear profile of distal part of bowden.

1 dwg

FIELD: medical technique.

SUBSTANCE: apparatus includes base supporting guides and carriage mounted with possibility of motion along guides. Rotary platform is mounted on base behind horizontal guides of carriage. On one edge of platform there is opening in which vertical shaping pin is arranged. Said pin is secured to base. On other edge of platform there is indicator of platform rotation angle. Guiding tube is mounted between said edges and pressing spring if arranged in parallel relative to said tube with possibility of axial motion. Adjusting and pressing screws are mounted respectively at both ends of said spring. Carriage includes clamping mechanism and handle moving carriage on guides. Member for controlled limitation of horizontal motion of carriage is mounted on base between horizontal guides of carriage.

EFFECT: possibility for simplified forming of curvilinear profile of distal part of bowden.

1 dwg

FIELD: manufacture of springs, possibly for furniture, particularly manufacture of springy mattresses for soft furniture.

SUBSTANCE: method comprises steps of feeding round cross section wire; forming and binding knots on supporting turns due to twisting wire end under predetermined pressure around supporting turn; before forming spring blank, imparting to wire out-off-round cross section or making spring blank from wire having out-off-round cross section. When wire end portion is twisted around supporting turn in contact zone of twisted wire and wire of supporting turn recesses are formed on portions of supporting turn wire having positive deflection from out-off-roundness due to creation of pressure exceeding preset value. Twisted wire is pressed-in to said recesses.

EFFECT: enhanced strength of knots, increased useful time period of spring, operational reliability of articles.

2 cl

FIELD: making springs.

SUBSTANCE: device comprises unmovable plate, race for receiving spring, punch with a ball surface which is in a contact with the ball surface of the top insert, bottom insert mounted on the bottom plate, and screw surfaces with a stop made on the both inserts, which copy the profile of the end turns of the spring. The bottom unmovable plate is provided with stops and L-shaped guiding planks which are in a contact with the answering projections of the race and mechanism for moving the race from the setting zone and hollow of the spring to the working zone under the punch and back.

EFFECT: enhanced convenience and safety.

2 dwg

FIELD: making and testing springs.

SUBSTANCE: device comprises punch with ball surface, which is in a contact with the ball surface of the top insert, bottom insert mounted on the bottom unmovable plate, and screw surfaces with stop provided on both of the inserts. The screw surfaces copy the profile of the end turns of the spring. The bottom unmovable plate is provided with rectangular guiding supports, which are rearranged over the outer diameter of the spring. The rectangular guiding supports are secured to the bottom unmovable plate by means of radial T-shaped slots made in the plate.

EFFECT: simplified design.

2 dwg

FIELD: manufacture of jewelry articles, possibly in jewelry industry at making small springs of rod type locks of gold alloys.

SUBSTANCE: method comprises steps of forming wire of gold alloy by deforming during several stages at intermediate annealing procedures between said stages; at last stage of wire forming deforming alloy by drawing it at total reduction degree 65 - 85%; then winding spring of formed wire. In preferable variant of invention last stage of drawing is realized during eight passes at total reduction degree 77.8%. The most effective method of forming springs is realized at using gold of purity degree 585.

EFFECT: enhanced manufacturing effectiveness, improved quality of articles due to their enhanced elastic properties.

3 cl, 1 ex

FIELD: manufacture of helical compression springs operating at impingement of their turns in condition of elevated temperatures.

SUBSTANCE: after coiling spring with pitch more than that of ready spring, the last is subjected to heat treatment and shot-blast hardening. After thermal compression and scragging spring or simultaneously with said operations, turns of spring are subjected to plastic strengthening. In order to realize it, spring is compressed by action of load consisting of 10 - 300 F3 where F3 - spring force at maximum deformation.

EFFECT: possibility for making springs with improved dynamic strength and with accurate stable in time elastic characteristics.

4 cl

FIELD: manufacture of helical compression springs operating at impingement of their turns in condition of elevated temperatures.

SUBSTANCE: after coiling spring with pitch exceeding pitch of ready spring, the last is subjected to heat treatment and shot-blast hardening. Then spring is compressed by action of axial load consisting of 10 - 300 F3 where F3 - spring force at maximum deformation. It is possible to perform secondary compression of spring by action of load increased in proportion to relation of target camber to camber value caused by first load. Spring may be subjected to action of vibration loads. In order to satisfy high demands made to force parameters of spring the last is dressed after twisting and ends of spring are ground and chamfered.

EFFECT: possibility for making springs with accurate and stable in time elastic characteristics.

4 cl

FIELD: manufacture of jewelry articles, possibly manufacture of gold-alloy small springs of locks of snap hooks in jewelry industry.

SUBSTANCE: method comprises steps of winding from wire prepared by deforming alloy at several stage with intermediate annealing between said stages small spring; at last stage deforming alloy by drawing at total reduction degree exceeding 85% but less than 95%. Preferably drawing of wire is started from initial diameter of wire din = 1mm till final diameter df = 0.35 mm for 13 passes at total reduction degree 87.3%. Spring is made of gold alloy with purity 385.

EFFECT: enhanced elastic properties of spring, improved manufacturing process for realizing the method.

3 cl, 1 ex

FIELD: manufacturing and testing of spring, possible usage in industrial branches, manufacturing and using springs: mechanical engineering, aviation engineering, automobile engineering, tool-making industry, etc.

SUBSTANCE: device for contact predeformation of springs contains lower immobile plate and lower moving plate, mounted on which with possible re-mounting along outer diameter of spring are guiding supports for same. Spring is positioned between lower and upper inserts, on end surfaces of which screw surfaces are made, repeating profile of edge coils of spring. Inserts have stops, lower insert being positioned on lower moving plate between re-mountable guiding supports, and spring being mounted so that it is in contact by edge coils with screw surfaces of inserts and abuts by end of edge coils against stops of inserts. Upper insert is made with ball surface, interacting with ball surface of puncheon, held on lower immobile plate are guiding bars and stops, limiting edge positions of lower moving plate, which is provided with mechanism for its movement into working zone under the puncheon and backwards.

EFFECT: increased labor productivity during predeformation of springs and during adjustment of device for predeformation of springs with different sizes.

4 dwg

FIELD: technological processes.

SUBSTANCE: bar is heated up to the temperature that provides homogenisation of steel high-temperature phase. Then spring is wound from bar at its heating temperature. At that spring is subjected to turn-by-turn tempering. Tempering of every turn is carried out after its winding and after-winding ageing in time sufficient for steel polygonisation for complication of recrystallisation rearranging of its structure. Final thermal treatment of spring is carried out by means of its tempering.

EFFECT: higher strength and operational durability of produced spring.

Up!