KR102383604B1 - Method for forming spring - Google Patents

Abstract

The present invention comprises: a supply step of supplying a steel wire wound in a circular shape as the form of a straight line; a transferring step of transferring the steel wire; a forming step of pushing the steel wire in a plurality of directions to form the same into a spring shape; a cutting step of cutting the formed spring; a post-processing step of leveling the cut spring; a heat treating step of heat treating the post-processed spring; and a polishing step of polishing both cross sections of the heat-treated spring by using polishing equipment. In the transferring step, the steel wire is transferred by a plurality of transfer rollers, and in the forming step, the steel wire is formed into the spring shape by a forming element. According to the present invention, the spring with flat cross sections is manufactured with a size suitable for use in a reduced manufacturing time.

Description

Spring manufacturing method {METHOD FOR FORMING SPRING}

The present invention relates to a method for manufacturing a spring.

In general, a spring is a coil spring that operates by torsion or torsion (rotational motion), and the end of the torsion spring is attached to a separate component to store mechanical energy during torsion.

These springs manufacture custom torsion springs in round, square, rectangular and special section wires, and the most common material types are formed from stainless steel, music wire, spring steel and hard steel.

The spring legs can be in any position and formed into almost any bend, bend, twist, or annular form depending on the custom application.

Spring ends are available in several standard shapes: short hook end, hinged end, straight offset, straight torsion, special end, straight torsion, and double torsion.

However, there is a problem in that it is not possible to manufacture a double torsion spring having a variety of sizes because it is not possible to form a size suitable for use when manufacturing such a spring. In addition, there is a disadvantage that the cross section is round when manufacturing the spring.

Accordingly, there is a need for a method of manufacturing a spring having a flat cross section.

On the other hand, as the prior art related to the present invention, there is Korean Patent Registration No. 10-1419698 (published on July 9, 2014) and the like.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a method for manufacturing a spring having a flat cross section through a supply step, a transfer step, a forming step, a cutting step, a post-processing step, a heat treatment step and a polishing step .

According to the present invention for the purpose of solving the above problems, a supply step of supplying a circularly wound steel wire in a straight line; a transfer step in which the steel wire is transferred; a forming step in which the steel wire is pushed in a plurality of directions to form a spring shape; Cutting step in which the molded spring is cut; Post-processing step of leveling the cut spring; a heat treatment step in which the post-processed spring is heat treated; and a polishing step of polishing both end surfaces of the heat-treated spring using a polishing device, wherein in the conveying step, the steel wire is conveyed by a plurality of conveying rollers, and in the forming step, the steel wire is formed by a forming means. is formed in the shape of a spring,

The conveying roller may include a first conveying roller disposed at the upper and lower sides of the steel wire and a second conveying roller installed in front of the first conveying roller and disposed at the upper and lower sides.

The shaping means may include a first shaping part and a second shaping part, and the first shaping part and the second shaping part may be arranged at 90°.

The polishing equipment includes a holder on which the heat-treated spring is mounted, a support member formed at each edge of the holder, a first auxiliary plate disposed on the upper end to fix the mounted spring, and a first auxiliary plate formed on the upper surface of the first auxiliary plate. 2 Auxiliary plate, a hydraulic press installed on the upper surface of the second auxiliary plate to apply pressure to the second auxiliary plate, and a polishing pad formed vertically spaced apart from the mounted spring, the first auxiliary plate and the second auxiliary plate Each edge is connected to the support member, and the cross section of the spring can be polished by moving the polishing pad left and right.

According to the present invention having the above configuration and characteristics, in manufacturing a spring having a flat cross-section, a spring having a size suitable for use can be manufactured, and spring production time can be reduced.

1 is a flowchart illustrating a spring manufacturing method according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining step S110 of FIG. 1 .
FIG. 3 is a diagram for explaining step S120 of FIG. 1 .
4 is a view for explaining steps S130 and S140 of FIG. 1 .
5 is a view showing a bending machine according to an embodiment of the present invention.
6 is a view showing a heat treatment apparatus according to an embodiment of the present invention.
7 is a view showing a polishing apparatus according to an embodiment of the present invention.
8 is a view showing a spring manufactured through a method for manufacturing a spring according to an embodiment of the present invention.

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification are only to be referred to to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

1 is a flowchart illustrating a spring manufacturing method according to an embodiment of the present invention.

As shown in Figure 1, the spring manufacturing method according to the embodiment of the present invention is a supply step (S110), a transfer step (S120), a forming step (S130), a cutting step (S140), a post-processing step (S150), a heat treatment step ( S160) and a polishing step (S170).

First, in the supply step ( S110 ), the steel wire ( 1 ) wound around the turret ( 10 ) is provided to the conveying roller ( 20 ) using a plurality of induction devices ( 11 ).

FIG. 2 is a diagram for explaining step S110 of FIG. 1 .

As shown in FIG. 2 , the turret 10 according to the embodiment of the present invention supplies the steel wire 1 by releasing the steel wire 1 forming a roll shape. At this time, the steel wire 1 forming the roll shape is accommodated in a weaving state in the supply barrel 111 of the turret 10, and the steel wire 1 by the rotation of the feeding roller provided in the feeding device in the transfer step (S120). The steel wire 1 is smoothly supplied while the supply barrel 111 rotates slower than the moving speed of the

The turret 10 including the above-described supply cylinder includes a plurality of induction devices 11 erected at predetermined intervals on the outside of the supply cylinder as shown in FIG. 2 , and the induction device 11 includes a support rod ( 112), and the upper end and lower end are shaft-coupled by the roller support 113 formed toward the supply tube 111 at a predetermined height of the support rod 112 to further include a guide roller 114 that is rotatably provided can

At this time, the rotation of the supply cylinder 110 may be stopped during other operations, but the operation of the supply cylinder 110 serving to untie the steel wire 1 forming the roll shape is repeatedly turned on/off. In this case, twisting or bending of the steel wire 1 may occur, and in order to prevent this, the supply tube 110 is preferably rotated continuously.

Next, in the conveying step ( S120 ), the steel wire exiting through the turret 10 is conveyed to the forming means 30 through the conveying roller 20 .

At this time, the conveying roller 20 is installed in front of the first conveying roller 201 and the first conveying roller 201 disposed on the upper and lower sides of the steel wire 1 and the second conveying roller 202 disposed at the upper and lower sides. includes

FIG. 3 is a diagram for explaining step S120 of FIG. 1 .

That is, as shown in FIG. 3 , the first conveying roller 201 and the second conveying roller 202 include a plurality of rollers, and the size of the first conveying roller 201 is the size of the second conveying roller 202 . It may be formed smaller, and may be formed in various shapes and numbers according to design specifications.

Next, in the forming step (S130), the steel wire (1) transferred through the transfer step (S120) is pushed in a plurality of directions to form a spring shape.

FIG. 4 is a view for explaining step S130 of FIG. 1 .

As shown in FIG. 4 , the forming means 30 includes a first forming part 301 and a second forming part 302 , and the first forming part 301 and the second forming part 302 are rotated at 90°. are placed The forming means 30 in FIG. 4 shows that the first forming part 301 and the second forming part 302 are present, but the forming means is added or disposed depending on the shape of the spring may vary .

Next, the cutting step (S140) cuts the formed spring 100 by using the cutting means 303 formed at a position facing the first forming part 301 . That is, by using the cutting means 303 as shown in FIG. 4, the formed spring 100 is cut.

Next, in the post-processing step (S150), the cut spring 100 is leveled using a press machine. At this time, in the post-processing step (S150), the spring 100 may be formed in various shapes as well as horizontally.

5 is a view showing a bending machine according to an embodiment of the present invention.

That is, in the post-processing step ( S150 ), the spring 100 may be leveled by adjusting the spacing of the spring 100 using the bender shown in FIG. 5 . By leveling each spring 100 in this way, the spring 100 having a uniform shape can be formed.

Next, in the heat treatment step (S160), the post-processed spring 100 is heat treated using a heat treatment device. 6 is a view showing a heat treatment apparatus according to an embodiment of the present invention.

Next, in the polishing step (S170), both end surfaces of the heat-treated spring are polished using the polishing equipment 40 .

7 is a view showing a polishing apparatus according to an embodiment of the present invention.

Here, as shown in FIG. 7 , the polishing equipment 40 according to an embodiment of the present invention includes a holder 401 on which the heat-treated spring 100 is mounted, and a support member 406 formed at each edge of the holder 401 . ), the first auxiliary plate 402 disposed on the upper end to fix the mounted spring 100, the second auxiliary plate 403 formed on the upper surface of the first auxiliary plate 402, the upper surface of the second auxiliary plate 403 It is installed and includes a hydraulic press 404 for applying pressure to the second auxiliary plate 403, and a polishing pad 405 formed vertically spaced apart from the mounted spring 100, the first auxiliary plate 402, the second Each edge of the auxiliary plate 403 is connected to the support member 406 , and the cross section of the spring 100 is polished by the left and right movement of the polishing pad 405 .

At this time, the cradle 401 forms a 'v'-shaped groove to prevent the heat-treated spring 100 from moving left and right to mount the spring 100 . In addition, the support member 406 is manufactured in the form of a spoke of a hydraulic cylinder, so that the first auxiliary plate 402 and the second auxiliary plate 403 are pressed through the hydraulic pressure of the hydraulic press 404, and the spring 100 ) is fixed.

Then, while the polishing pad 405 rotates, the cross section of the fixed spring 100 is polished.

8 is a view showing a spring manufactured through a spring manufacturing method according to an embodiment of the present invention. That is, as shown in FIG. 8 , it is possible to manufacture a spring in which the cross section of the spring 100 is polished flat.

In addition, according to an embodiment of the present invention, it further includes a coating agent for preventing the spring 100 from drying to prevent rust formation of the spring 100 .

In this case, the coating agent may be formed by applying a coating solution containing 30% by weight of bisphenol A phenoxy, 20% by weight of a photosensitive liquid epoxy, and 50% by weight of a functional additive. Bisphenol A phenoxy and a photosensitive liquid epoxy are used to form the adhesive.

Here, the bisphenol A-type phenoxy may be substituted with bisphenol F-type phenoxy, bromide-modified bisphenol A-type phenoxy, or bromide-modified bisphenol F-type phenoxy.

In addition, the photosensitive liquid epoxy may be substituted with a bisphenol A liquid epoxy, a bisphenol F liquid epoxy, a trifunctional or more multifunctional liquid epoxy, a rubber-modified liquid epoxy, a urethane-modified liquid epoxy, or an acrylic-modified liquid epoxy.

The functional additive, which is a core component of the coating solution, can effectively remove nitrogen oxides, organic halogen compounds, and odor gases present in the atmosphere, and prevents the hydrophilic component from being absorbed or reacted by the lipophilic group into the body, so that the coating is By preventing drying, it is possible to improve adhesion.

At this time, the functional additive is anatase titanium dioxide 12 parts by weight, hydrogen polysiloxane 4 parts by weight, platinum chelate catalyst 2 parts by weight, vinyl polysiloxane 25 parts by weight, N-vinyl caprolactam 10 parts by weight, diallyl ester acetal 4 parts by weight and organic 20 parts by weight of silane.

Anatase titanium dioxide is stirred with a platinum chelate catalyst to produce titanium dioxide maintaining high hydrophilicity, and the produced titanium dioxide can make an active state not only in the ultraviolet region but also in the visible region, and electrons and holes in the active state It moves to the surface and combines with oxygen and hydroxyl groups to form radicals, so nitrogen oxides and organic halogen compounds can be removed.

And anatase titanium dioxide contains 12 parts by weight, and when used in less than 12 parts by weight, nitrogen oxides, organic halogen compounds, etc. cannot be effectively removed, and when used in excess of 12 parts by weight, to form a narrow energy band gap Hard.

Next, the platinum chelate is stirred with anatase titanium dioxide to produce titanium dioxide, and stirred with organosilane to produce an undecyl group in which an alkoxy alcohol and a polyether group are combined to have both hydrophilicity and lipophilicity. The platinum chelate contains 2 parts by weight, and when used in less than 2 parts by weight, the energy band interval of titanium dioxide cannot be effectively reduced, and when used in excess of 2 parts by weight, it is not economical.

Diallyl ester acetal is a curing agent, N-vinyl caprolactam is a hydrophilic monomer, and is stirred with a vinyl polysiloxane resin to have hydrophilicity.

Such diallyl ester acetal contains 4 parts by weight, and when used in less than 4 parts by weight, the curing rate is reduced, and when used in excess of 4 parts by weight, the optimum curing rate cannot be maintained, resulting in reduced economic efficiency and lowered physical properties can occur

In addition, N-vinyl caprolactam contains 10 parts by weight, and when used in less than 10 parts by weight or in excess of 10 parts by weight, hydrophilicity above a certain level cannot be secured.

The organosilane includes an undecyl group in which an alkoxy alcohol and a polyether group are bonded together using platinum chelate as a catalyst.

In this case, the undecyl group to which the alkoxy alcohol and the polyether group are bonded together includes a hydrophilic group and a lipophilic group.

Here, the organosilane contains 20 parts by weight, and when used in less than 20 parts by weight, the alkoxy alcohol and polyether groups do not bind to the undecyl group, and when used in excess of 20 parts by weight, it is not economical.

Through these steps S110 to S170, it is possible to manufacture a spring having a plurality of shapes.

The present invention described above with reference to the accompanying drawings is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

1: steel wire 10: turret
11: guide device 100: spring
111: supply barrel 112: support bar
113: roller support 114: guide roller
20: feed roller
201: first conveying roller 202: second conveying roller
30: molding means 301: first molding part
302: second forming part 303: cutting means
40: grinding device 401: holder
402: first auxiliary plate 403: second auxiliary plate
404: hydraulic press 405: polishing pad
406: support member

Claims (4)

A supply step of supplying a circularly wound steel wire in a straight line;
a transfer step in which the steel wire is transferred;
a forming step in which the steel wire is pushed in a plurality of directions to form a spring shape;
Cutting step in which the molded spring is cut;
Post-processing step of leveling the cut spring;
a heat treatment step in which the post-processed spring is heat treated; and
a polishing step of polishing both end surfaces of the heat-treated spring using a polishing device;
In the transferring step, the steel wire is transferred by a plurality of transfer rollers, and in the forming step, the steel wire is formed in a spring shape by a forming means,
The grinding equipment is
A holder for mounting the heat-treated spring, a support member formed at each edge of the holder, a first auxiliary plate disposed on the upper end to fix the mounted spring, a second auxiliary plate formed on the upper surface of the first auxiliary plate, the A hydraulic press installed on the upper surface of the second auxiliary plate to apply pressure to the second auxiliary plate, and a polishing pad formed vertically spaced apart from the mounted spring, wherein each edge of the first auxiliary plate and the second auxiliary plate is A method of manufacturing a spring connected to the support member and polishing the cross section of the spring by moving the polishing pad left and right.
The method according to claim 1,
The feed roller is a spring manufacturing method comprising a first feed roller disposed on the upper and lower sides of the steel wire and a second feed roller installed in front of the first feed roller and disposed at the upper and lower sides.
The method according to claim 1,
The forming means includes a first forming part and a second forming part, and the first forming part and the second forming part are disposed at a 90° angle.
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