CN115401139A - Spring manufacturing method and winding machine thereof - Google Patents
Spring manufacturing method and winding machine thereof Download PDFInfo
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- CN115401139A CN115401139A CN202110590659.7A CN202110590659A CN115401139A CN 115401139 A CN115401139 A CN 115401139A CN 202110590659 A CN202110590659 A CN 202110590659A CN 115401139 A CN115401139 A CN 115401139A
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- 238000004804 winding Methods 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 238000011282 treatment Methods 0.000 claims abstract description 43
- 238000005496 tempering Methods 0.000 claims abstract description 36
- 238000005422 blasting Methods 0.000 claims abstract description 24
- 238000007747 plating Methods 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims description 64
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 239000010721 machine oil Substances 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 8
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 7
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical group [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 22
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 4
- 239000001257 hydrogen Substances 0.000 abstract description 4
- 238000004381 surface treatment Methods 0.000 abstract description 4
- 239000010705 motor oil Substances 0.000 description 3
- 208000032544 Cicatrix Diseases 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- 230000037387 scars Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F35/00—Making springs from wire
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Springs (AREA)
- Wire Processing (AREA)
Abstract
A spring manufacturing method and a winding machine thereof are characterized in that a steel wire is coated with a pre-plating layer, or the steel wire coated with the pre-plating layer is selected, the steel wire coated with the pre-plating layer on the surface is added into the winding machine to wind the spring, the spring after being wound is tempered twice, and shot blasting is carried out between the two tempering treatments. According to the spring manufacturing method and the spring winding machine, the steel wire coated with the pre-plating layer is adopted for winding, so that the subsequent surface treatment process is simplified, and the hydrogen embrittlement hidden danger caused by a blackening process is avoided; in addition, two tempering treatments are carried out after the spring is wound, and shot blasting treatment is carried out between the two tempering treatments, so that the fatigue life of the spring is further greatly prolonged.
Description
Technical Field
The invention relates to a molded case circuit breaker, in particular to a manufacturing method of a spring and a winding machine thereof.
Background
The spring used in the molded case circuit breaker is manufactured by a traditional manufacturing method, so that the fatigue life of the spring is short, and the whole life of the molded case circuit breaker is seriously influenced. The traditional spring manufacturing method has the following defects: firstly, the spring is made of conventional spring steel wire materials such as 65Mn, 60Si2Mn and the like; secondly, the clamp of the traditional spiral spring winding machine is rough, severe scars are generated on the spring main body, and in the later use process, the reciprocating motion enables the scars to be rapidly expanded and extended, so that the spring is early failed; thirdly, the existing springs are mostly subjected to surface treatment by adopting a blackening process, and hydrogen embrittlement hidden troubles are left in the springs in the blackening treatment process; fourthly, shot blasting is not usually carried out in the spring manufacturing process, so that the fatigue life of the spring is poor due to the lack of a surface strengthening procedure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a manufacturing method capable of greatly prolonging the fatigue life of a spring and a winding machine thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a spring manufacturing method comprises the steps of coating a steel wire with a pre-plating layer, or selecting the steel wire coated with the pre-plating layer, adding the steel wire coated with the pre-plating layer on the surface into a winding machine to wind a spring, carrying out twice tempering treatment on the wound spring, and carrying out shot blasting treatment between the two tempering treatment.
Preferably, an oil device is installed at the position of adding the steel wire in the winding machine, and oil is added to the surface of the steel wire when the steel wire is added.
Preferably, the winding machine is provided with a first end bending part clamp and a second end bending part clamp for clamping and winding the steel wire, and the contact surface of the first end bending part clamp and the steel wire and the contact surface of the second end bending part clamp and the steel wire are polished.
Preferably, the tempering temperature before shot blasting is 310-330 ℃, the tempering time is 5-7min, the tempering temperature after shot blasting is 250-270 ℃, and the tempering time is 5-7min; selecting steel balls with the diameter of 0.1-0.5mm to carry out shot blasting for 5-20 min.
Preferably, the precoating layer of the steel wire is zinc-aluminum alloy, and the diameter of the steel wire is 2.2mm.
Preferably, the steel wire comprises the following components in percentage by weight: c:0.80 to 0.85 percent; si:0.185 to 0.195 percent; mn:0.45-0.55%; s:0.005-0.007%; p:0.009-0.011%; the balance being Fe.
Preferably, after the first tempering treatment, force value detection is carried out on the wound spring, the spring meeting the force value requirement is subjected to shot blasting treatment and second tempering treatment in sequence, the force value detection is carried out on the spring which is subjected to the second tempering treatment again, and the rust preventive oil is sprayed on the spring meeting the requirement.
The winding machine applied to the spring manufacturing method comprises a bending fixture for bending the spring, wherein the bending fixture comprises a first end bending fixture and a second end bending fixture, the first end bending fixture is provided with a first groove used for being matched with a first end of the bent spring, the second end bending fixture is provided with a second groove used for being matched with a second end of the bent spring, and a first contact surface of the first groove and a second contact surface of the second groove are polished and are used for being in contact with a steel wire for forming the spring.
Further, an engine oil device is arranged and used for spraying engine oil on the surface of the steel wire when the steel wire is fed.
Furthermore, the second end bending part clamp comprises a supporting piece, a matching piece and a fixing piece, an open slot is formed in one side of the supporting piece, the matching piece is assembled in the open slot, and the supporting piece and the matching piece are fixed into a whole by the fixing piece;
two parallel arc-shaped grooves are formed in one side of the fitting piece, the two arc-shaped grooves jointly form a second groove, the distance between the two arc-shaped grooves is the inner diameter of the spring, the arc radius of each arc-shaped groove is equal to the radius of a steel wire forming the spring, and the inner side face of each arc-shaped groove is a second contact face subjected to polishing treatment;
the first end is buckled a lateral end portion of department anchor clamps and is equipped with first recess, the whole bending of first recess forms the arc orbit, the internal diameter of first recess equals with the external diameter that forms the spring wire, the medial surface of first recess be polishing treatment's first contact surface.
The manufacturing method of the spring is different from the prior art that the coating is coated after the winding, the spring is wound after the pre-coating is coated, and the spring is formed by coating the pre-coating on the steel wire firstly or winding the steel wire coated with the pre-coating, so that the subsequent surface treatment process is simplified, the blackening process is not carried out, and the hydrogen embrittlement hidden trouble caused by the blackening process is avoided; in addition, two tempering treatments are carried out after the spring is wound, and shot blasting treatment is carried out between the two tempering treatments, so that the fatigue life of the spring is further greatly prolonged.
According to the spring winding machine, the contact surfaces of the clamps and the steel wire are polished, particularly the contact surfaces of the first groove and the second groove of the first end bending clamp and the second end bending clamp are polished, so that the surfaces of the springs cannot be damaged by the first end bending clamp and the second end bending clamp in the spring winding process.
In addition, add steel wire department assembly machine oil device in the coiling machine, when adding the steel wire, thereby reduce the scotch risk in the spring coiling process through machine oil device to the steel wire surface spraying one deck machine oil, be applicable to and protect the steel wire that coats the precoating, simplified the processing technology of spring.
Drawings
FIG. 1 is a flow chart of a method of making a spring according to the present invention;
FIG. 2 is a front view of the clamp of the present invention at a first end bend;
FIG. 3 is a top view of the clamp of the present invention at a first end bend;
FIG. 4 is a front view of a support member of the clamp of the present invention at a second end bend;
FIG. 5 is a top view of a support member of the clamp of the present invention at a second end bend;
FIG. 6 is a front view of the mating member of the clamp of the present invention at the second end bend;
FIG. 7 is a top view of a support member of the clamp of the present invention at a second end bend;
FIG. 8 is a front view of the fastener of the present invention in a second end bend clamp.
Detailed Description
The following will further describe a method for manufacturing a spring and a winding machine thereof according to the present invention with reference to the embodiments shown in fig. 1 to 8. The method of manufacturing a spring and the winding machine thereof according to the present invention are not limited to the following description of the embodiments.
A spring manufacturing method comprises the steps of assembling a first end bending clamp 1 and a second end bending clamp 2 on a winding machine, coating a pre-coating on a steel wire, or selecting the steel wire coated with the pre-coating, adding the steel wire coated with the pre-coating on the surface into the winding machine to wind a spring, carrying out twice tempering treatment on the spring after the winding is finished, and carrying out shot blasting treatment between the twice tempering treatment.
The manufacturing method of the spring is different from the prior art that the coating is coated after the winding, the spring is wound after the pre-coating is coated, and the spring is formed by coating the pre-coating on the steel wire firstly or winding the steel wire coated with the pre-coating, so that the subsequent surface treatment process is simplified, the blackening process is not carried out, and the hydrogen embrittlement hidden trouble caused by the blackening process is avoided; in addition, two tempering treatments are carried out after the spring is wound, and one shot blasting treatment is carried out between the two tempering treatments, so that the fatigue life of the spring is further greatly prolonged.
As shown in fig. 1, a method for manufacturing a spring is provided according to an embodiment, wherein a first end bending fixture 1 and a second end bending fixture 2 are assembled on a winding machine, a pre-plating layer is firstly coated on a steel wire, the steel wire with the pre-plating layer coated on the surface is added into the winding machine to wind the spring, preferably, the pre-plating layer is made of zinc-aluminum alloy, the first end bending fixture 1 is used for bending one end of the steel wire to form a first end of the spring, then, the spring is wound by the winding machine, and finally, the second end of the spring is bent by the second end bending fixture 2, wherein the first end bending fixture 1 and the second end bending fixture 2 respectively process two ends of the spring in the winding process, preferably, the contact surface of the first end bending fixture 1 and the steel wire and the contact surface of the second end bending fixture 2 and the steel wire are polished by an electric grinder to avoid damaging the surface of the spring and damaging the pre-plating layer; after the steel wire is wound to form the spring, firstly carrying out tempering treatment for one time to remove stress, wherein the tempering temperature is 310-330 ℃, the tempering time is 5-7min, the optimal scheme is that the tempering treatment is carried out for 6min at the temperature of 320 ℃, after the tempering treatment is finished, preferably carrying out a force value test, directly abandoning the spring which does not meet the force value requirement, then carrying out shot blasting treatment on the spring which meets the force value requirement, and carrying out shot blasting treatment for 5-20min by selecting a steel ball with the diameter of 0.1-0.5mm to strengthen the surface of the spring; and finally, tempering the spring subjected to shot blasting again at the tempering temperature of 250-270 ℃ for 5-7min, wherein the best scheme is to temper the spring at the temperature of 260 ℃ for 6 min. Preferably, the precoating layer is zinc-aluminum alloy. The steel wire comprises the following components in percentage by weight: c:0.80 to 0.85 percent; si:0.185-0.195%; mn:0.45-0.55%; s:0.005-0.007%; p:0.009-0.011%; the balance being Fe.
Of course, a steel wire pre-coated with a pre-plating layer may also be selected, in this embodiment, a zinc-aluminum alloy steel wire with a wire diameter of 2.2mm, which is disclosed in BEKAERT, is used, and the zinc-aluminum alloy is used as the pre-plating layer of the steel wire, and of course, other steel wire materials similar to the zinc-aluminum alloy pre-plating layer may also be selected. It should be noted that, usually, the trial winding process is performed first, that is, several springs are wound first, the first force value test is performed on the wound springs, after the force value requirement is satisfied, the springs satisfying the force value requirement are subjected to shot blasting and tempering treatment in sequence, and then the springs are wound in large batches.
Add machine oil to the steel wire surface through the machine oil device that sets up on the coiling machine, play the lubrication action in the coiling process, reduce the wearing and tearing to the steel wire, avoid destroying the precoating, preferred machine oil device sets up in steel wire entry department, begins to steel wire surface spraying machine oil from the inlet wire.
In addition, after the final tempering treatment is finished, force value detection is carried out on the spring again, antirust oil is sprayed on the spring meeting the requirement, and the spring is manufactured.
In order to verify that the fatigue life of the spring is greatly prolonged in the embodiment, a mechanical spring tension-compression fatigue testing machine is adopted for verifying the spring, the frequency adopted in the fatigue testing process is 1Hz, the stroke is correspondingly adjusted according to the actual design of the spring, the spring is divided into four groups of experimental groups (a, b, c and d), wherein three groups (a, b and c) are subjected to shot blasting treatment under different parameters, the rest group (d) is not subjected to shot blasting treatment, 6 spring samples are selected from each experimental group, and the results are shown in the following table:
different scheme spring fatigue life data
According to the table, the fatigue life of the spring after shot blasting treatment is obviously prolonged, wherein the best shot blasting treatment effect is achieved by selecting steel shots with the diameter of 0.4mm for 10 min.
A spring winding machine suitable for winding the spring comprises a first end bending clamp and a second end bending clamp which are arranged at one end of a steel wire outgoing line, a pushing mechanism is further arranged at one end of the steel wire outgoing line of the winding machine, the pushing mechanism at least comprises two groups of pushing pieces matched with a first bending clamp 1 and a second bending clamp 2, the first end bending clamp 1 is matched with one group of pushing pieces to be used for bending the steel wire at the first end of the spring, the second end bending clamp 2 is matched with the other group of pushing pieces to be used for bending the steel wire at the second end of the spring, the first end bending clamp 1, the second end bending clamp 2 and the contact surface of the steel wire forming the spring are respectively polished to form a first contact surface and a second contact surface, preferably, an organic oil device is arranged at one end of the steel wire incoming line, and the machine oil device sprays machine oil on the surface of the steel wire when the steel wire enters the line.
According to the spring winding machine, the contact surface of the clamp and the steel wire is polished, and the engine oil device is assembled at the position where the steel wire is added in the winding machine, so that the spring winding machine is suitable for protecting the steel wire coated with the pre-plating layer, and the processing technology of the spring is simplified.
The bending clamp applied to the spring manufacturing method is described in detail with reference to fig. 2-8, the bending clamp comprises a first end bending clamp 1 and a second end bending clamp 2, the first end bending clamp 1 is provided with a first groove 11 used for matching with a first end of a bent spring, the second end bending clamp 2 is provided with a second groove used for clamping a second end of the spring, a first contact surface of the first groove 11 and a second contact surface of the second groove are polished and used for being in contact with a steel wire forming the spring, and after the first contact surface and the second contact surface are polished, scratches on the surface of the spring due to the rough clamp are avoided to the greatest extent, a pre-plating layer is damaged, and therefore hidden dangers are buried in the later use process of the spring.
A first end bending fixture 1 is introduced with reference to fig. 2-3 and used for winding a tension spring, the first end bending fixture 1 is integrally in the shape of a step with a thick end and a thin end, a groove structure is arranged in the middle of the thick end and used for being connected with a winding machine, the thin end face of the first end bending fixture 1 is set as an inclined plane, a protruding portion is arranged on the inclined plane, the protruding portion is arranged on the lower side of the inclined plane in fig. 2, a first groove 11 is arranged at the end portion of the protruding portion, the inner side face of the first groove 11 is polished to be used as a first contact face which is in contact with a steel wire, the first groove 11 is integrally bent to form an arc-shaped track, the inner diameter of the first groove 11 is equal to the outer diameter of the formed spring steel wire, when the steel wire extends into the first groove 11, the steel wire is clamped by the first groove 11 along with the rotation of the winding machine and is bent to form an arc shape by the track of the first groove 11, the steel wire is pushed and bent by the action of the winding machine matched with the first end bending fixture 1, so that the bent steel wire and the bent steel wire is twisted to form an included angle with a pull ring of the spring used for winding, and then the spring.
A second end bending part clamp 2 is introduced with reference to fig. 4 to 8, the second end bending part clamp 2 includes a supporting member 22, a fitting member 23 and a fixing member 24, and compared with the existing integrally formed structure, the split structure can flexibly replace parts when springs with different wire diameters are wound, and cost can be saved.
An open slot 221 is formed in one side of the support member 22, in fig. 5, the support member 22 is integrally in a U-shaped structure after the open slot 221 is formed, and a groove structure is formed in the support member 22 and used for being connected with a winding machine; the fitting member 23 is fitted in the opening groove 221 and the support member 22 is fixed integrally with the fitting member 23 by the fixing member 24.
As shown in fig. 6 and 7, one side of the fitting member 23 is also provided with a groove structure having an opening in the same direction as the opening groove 221, two side walls of the groove structure are respectively provided with an arc-shaped groove 231, the two arc-shaped grooves 231 are parallel to each other, the opening direction of the two arc-shaped grooves 231 is in the same direction as the opening direction of the opening groove 221, the two arc-shaped grooves 231 jointly form a second groove in contact with the steel wire, inner side surfaces of the two arc-shaped grooves 231, that is, two arc-shaped surfaces, are used as a second contact surface in cooperation with the steel wire and are polished, preferably, an end surface of one side wall of the groove structure on the fitting member 23 is slightly close to the opening groove 221 of the supporting member 22, when the two arc-shaped grooves 231 are kept parallel to each other, groove bottoms of the two arc-shaped grooves 231 are not on the same plane, and one arc-shaped groove 231 is located further outside (i.e., closer to the opening of the opening groove 221); the arc radius of each arc-shaped groove 231 of the spring is equal to the radius of the steel wire forming the spring, when the last circle of steel wire is pushed into a semicircular pull ring under the coordination of the second groove, the steel wire forming the semicircular pull ring is respectively attached to the two arc-shaped grooves 231, and the distance between the two arc-shaped grooves 231 is the inner diameter of the spring; furthermore, the fitting piece 23 and one side of the opening groove 221 are both provided with an inclined plane, so that the height of the opening groove 221 is gradually increased from the opening, which is beneficial for the pushing piece to push the last circle of steel wire of the spring, at this time, the supporting piece 22 and the fitting piece 23 are integrally in a trapezoidal structure, and in addition, the two sides of the opening groove 221 are preferably in a concave-convex structure, so as to enhance the assembly stability with the fitting piece 23.
The support member 22 and the fitting member 23 are provided with assembly holes, the assembly holes are circular holes in this embodiment, as shown in fig. 8, the fixing member 24 is a rod structure, the fixing member 24 is assembled in the circular holes to fix the support member 22 and the fitting member into a whole, the support member 22 and the fitting member 23 can wind springs with different wire diameters, and the springs with different types can be wound by only replacing the fitting member 23.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all should be considered as belonging to the protection scope of the invention.
Claims (10)
1. A manufacturing method of a spring is characterized by comprising the following steps: and (3) coating a pre-plating layer on the steel wire, or selecting the steel wire coated with the pre-plating layer, adding the steel wire coated with the pre-plating layer on the surface into a winding machine to wind the spring, carrying out twice tempering treatment on the spring after the winding is finished, and carrying out shot blasting treatment between the twice tempering treatment.
2. A method of making a spring as claimed in claim 1, wherein: and assembling an oil device at the position of adding the steel wire in the winding machine, and adding oil to the surface of the steel wire when the steel wire is added.
3. A method of making a spring as claimed in claim 1, wherein: the winding machine is provided with a first end bending part clamp (1) and a second end bending part clamp (2) which are used for clamping and winding steel wires, and the contact surfaces of the first end bending part clamp (1) and the steel wires and the contact surfaces of the second end bending part clamp (2) and the steel wires are polished.
4. A method of making a spring as claimed in claim 1, wherein: the tempering temperature before shot blasting is 310-330 ℃, the tempering time is 5-7min, the tempering temperature after shot blasting is 250-270 ℃, and the tempering time is 5-7min; selecting steel balls with the diameter of 0.1-0.5mm to carry out shot blasting for 5-20 min.
5. A method of making a spring as claimed in claim 1, wherein: the precoating of steel wire is zinc-aluminum alloy, and the steel wire diameter is 2.2mm.
6. A method of making a spring according to claim 1, wherein: the steel wire comprises the following components in percentage by weight: c:0.80-0.85%; si:0.185-0.195%; mn:0.45-0.55%; s:0.005-0.007%; p:0.009-0.011%; the balance being Fe.
7. A method of making a spring as claimed in claim 1, wherein: after the first tempering treatment, force value detection is carried out on the wound spring, the spring meeting the force value requirement is subjected to shot blasting treatment and second tempering treatment in sequence, the force value detection is carried out on the spring which is subjected to the second tempering treatment again, and anti-rust oil is sprayed on the spring meeting the requirement.
8. A winding machine applied to the spring manufacturing method according to any one of claims 1 to 7, comprising a bend jig for bending a spring, characterized in that: the bending fixture comprises a first end bending fixture (1) and a second end bending fixture (2), the first end bending fixture (1) is provided with a first groove (11) used for matching with a first end of a bending spring, the second end bending fixture (2) is provided with a second groove of a second end of the bending spring, and a first contact surface of the first groove (11) is polished to be in contact with a steel wire forming the spring.
9. A spring winding machine according to claim 8, wherein: the machine oil device is used for spraying machine oil on the surface of the steel wire when the steel wire is fed.
10. A spring winding machine according to claim 8, wherein: the second end bending part clamp (2) comprises a supporting piece (22), a fitting piece (23) and a fixing piece (24), an open groove (221) is formed in one side of the supporting piece (22), the fitting piece (23) is assembled in the open groove (221), and the supporting piece (22) and the fitting piece (23) are fixed into a whole through the fixing piece (24);
two parallel arc-shaped grooves (231) are formed in one side of the fitting piece (23), the two arc-shaped grooves (231) jointly form a second groove, the distance between the two arc-shaped grooves (231) is the inner diameter of the spring, the radius of an arc of each arc-shaped groove (231) is equal to the radius of a steel wire forming the spring, and the inner side face of each arc-shaped groove (231) is a second contact face for polishing treatment;
the spring steel wire polishing fixture is characterized in that a first groove (11) is formed in the end portion of one side of the first end bending part fixture (1), the first groove (11) is integrally bent to form an arc-shaped track, the inner diameter of the first groove (11) is equal to the outer diameter of a formed spring steel wire, and the inner side face of the first groove (11) is a first contact face for polishing treatment.
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