KR101366055B1 - A still grating of twist-bar manufacturing method - Google Patents

Abstract

The present invention relates to a method for manufacturing a twist bar for steel grating, and more particularly, the twist bar used as a reinforcing material in steel grating can be formed quickly by a simplified structure in an optimal state, and the steel wire is drawn out. Since the scale is removed by a physical method using a wire brush while supplying the raw material, the cost of environmental pollution and waste disposal by conventional chemical pretreatment is not incurred, and thus the cost is reduced and productivity is improved. have.

Description

Manufacturing method of twist bar for steel gratings {A still grating of twist-bar manufacturing method}

The present invention relates to a method for manufacturing a twist bar for steel grating, and more particularly, the twist bar used as a reinforcing material in steel grating can be formed quickly by a simplified structure in an optimal state, and the steel wire is drawn out. As the scale is removed by a physical method using a wire brush while supplying to the steel, the steel grating can reduce costs and improve productivity without incurring costs associated with environmental pollution and waste disposal by conventional chemical pretreatment. It relates to a method for producing a twist bar for.

The steel grating is installed at the entrance of the sewer or at the upper part of the exposed drainage line at the edge of the road to facilitate drainage of the rainfall on the road, or the ventilation opening to which the ventilation duct of the underground roadway is connected to the ground, To prevent the foreign matter from entering.

Steel, which is generally used for steel grating, has a low carbon content and a small brittleness. On the other hand, steel has a relatively high elongation percentage, which causes deformation. Therefore, it is necessary to impart strength. Also, the steel grating of the cast iron produced by casting is liable to be damaged by impact, so a stiffener is required.

An example of such a steel grating is shown in Fig.

As shown in FIG. 1, the steel grating is formed by fusing and fixing a plurality of diaphragms 400 at regular intervals within a frame 300 of a rectangular or square shape, A suitable number of twist bars 500 are welded and fixed to the frame 300 and the diaphragm 400.

The steel grating installed on the road side may cause fatigue failure at the fused portion between adjacent members due to dynamic load or other impact acting on the vehicle. In general, fatigue fracture can be deformed or fractured at a stress lower than that under stress when a dynamic load, which is rapidly fluctuating, is subjected to a static load rather than a static load.

As an example of an apparatus for twisting a wire-shaped material, Korean Patent No. 10-639775 discloses a wire twisting apparatus comprising wire feeding means for feeding a wire fed from the outside and provided at one side of a frame body, A twisting means for gripping and twisting an intermediate portion of the wire supplied from the holding means so as to be able to move left and right on the upper side of the frame body; Cutting means for cutting the other end portion of the wire twisted by the sting means and control means for outputting respective control signals for controlling operations of the respective holding means and twisting means and cutting means, The feed and twist and cut processes are automatically Which it will be fulfilled with.

In this device, the end of the wire supplied from the wire feeding part is grasped to be bent by being ripped, and then the intermediate part of the wire is moved in a state in which the rotating chuck of the twisted body, The wire is twisted to perform twist molding. When the cutting means cuts the end portion of the twisted wire, the bite state between the gripping chuck and the rotating chuck holding the both ends of the cut wire is released. In this case, a series of steps The structure that carries out these functions is relatively complicated.

On the other hand, the steel wire to be subjected to the drawing process is subject to scratches due to friction and friction in the manufacturing and transporting process, and metal oxides are formed by rain or moisture. If oxides are present on the surface of the steel wire, defects may be generated on the surface of the steel wire being drawn or the drawing die may be abraded severely. Therefore, the surface of the steel wire is first treated with chemicals to remove the oxide before the drawing operation.

In the chemical treatment process, the surface of the steel wire is removed in a process of immersing it in an immersion bath using a strong acidic substance that can strongly resist corrosion of the metal surface such as hydrochloric acid, The material is neutralized or removed to form a film.

Since the conventional method of removing the scale by the chemical pretreatment has to be performed separately before the drawing operation is performed, the work process becomes longer and the productivity is lowered. In addition, the waste water and sludge generated by the chemical treatment are treated as industrial waste So that there is a problem that a great deal of effort and cost are required for the pretreatment process.

Korean Patent No. 10-639775 Korea Patent No. 10-1137309 Korea Registered Utility Model 20-221525

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art,

To provide a method for producing a twisting bar for steel grating that improves the bending strength by leaving a torsional residual stress due to work hardening in the metal structure of the steel wire by a series of work processes performed more simply than a conventional steel twisting device. There is a purpose.

In addition, another object of the present invention is to provide a twisting bar for steel grating that improves the bending strength by leaving a torsional residual stress due to work hardening in the metal structure crystal of the steel wire by a series of working processes that are performed more simply than the conventional steel wire twisting apparatus It is to provide a device that can be manufactured.

Method for producing a twist bar for steel grating for achieving the object intended by the present invention comprises a first step of aligning while drawing the steel wire from the bundle of steel wire wound by the pull tension of the bull block (bull block); A second step of removing the scale of the outer circumferential surface of the steel wire that is aligned and transferred according to the first step; A third step of aligning and transporting the steel wire from which the scale has been removed according to the second step to a drawing position; A fourth step of drawing the steel wire transferred by the third step while drawing through a fixed die to form a cross section of a predetermined square shape; A fifth step of forming a coating on the surface of the drawn wire by passing the drawn wire in the fourth step through a lubricant; A sixth step of performing a twisting process while passing the steel wire having the lubricated coating formed therein through the fifth die; The sixth step is completed by the seventh step of winding the steel wire which has been drawn and twisted by the sixth step onto the drum of the fire block.

As described above, the manufacturing method of the twisted bar for steel grating of the present invention can be completed quickly by the simplified structure in the optimal state of the twist bar used as the reinforcement in the steel grating, the steel wire is drawn out Since the scale is removed by a physical method using a wire brush while supplying the raw material, it does not incur the costs associated with environmental pollution and waste disposal by chemical pretreatment, thereby reducing costs and improving productivity. have.

1 is a perspective view of a steel grating to which the present invention is applied;
2 is a perspective view of a twist bar manufactured by the present invention;
3 is a perspective view illustrating the entire system of an embodiment of the present invention.
4 is a front view showing the entire system of the embodiment of the present invention.
Figure 5 is a perspective view of a first embodiment of the present invention,
Figure 6 is a partial enlarged cross-sectional view of a first alignment in the embodiment of the present invention
7 is a perspective view of the scale removing unit in the embodiment of the present invention
8 is a plan view of a scale removing unit in an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a coating coating portion in an embodiment of the present invention
Figure 10 is a perspective view of a second embodiment of the present invention,
Figure 11 is a side sectional view showing a state in which the capstan roller is installed in an embodiment of the present invention
12 is a side cross-sectional view showing a state in which a second alignment roller is installed in an embodiment of the present invention.
Figure 13 is an exploded perspective view of a fixed die in an embodiment of the present invention.
14 (B) is a cross-sectional view showing a state in which the fixed die is fixed in the embodiment of the present invention
Figure 15 is an exploded perspective view of a rotating die assembly in an embodiment of the present invention.
16 is a cross-sectional view of a portion of a rotary die assembly in an embodiment of the present invention
17 is a cross-sectional view of a rotating die assembly in an embodiment of the present invention
18 is a flowchart illustrating a method of manufacturing a twist bar for steel grating in an embodiment of the present invention.

The present invention will be more clearly understood from the following preferred embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing in detail several embodiments of the present invention with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the details of construction and the arrangement of components shown in the following detailed description or illustrated in the drawings will be. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used herein for the purpose of the description and the appended claims, and are not intended to indicate or imply their relative importance or purpose.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Hereinafter, embodiments of the present invention will be described.

18 is a flowchart illustrating a method of manufacturing a twisting bar for steel grating according to an embodiment of the present invention.

As shown in FIG. 18, the method for manufacturing a twisting bar for steel grating according to the present invention firstly aligns the steel wires while drawing the steel wires from the bundle of steel wires wound by the pulling tension of the fire block (S100). One alignment transfer section 10 is formed. In this case, a detailed description of the first alignment transfer unit 10 will be described below.

Then, the scale is removed by the scale removing unit at the outer circumference of the line wire which is aligned and conveyed. (S200) In this case, a detailed description of the scale removing unit will be described below.

The scaled steel wire is passed through the lime water container and the dryer to neutralize the oxidized foreign substance on the surface of the steel wire and is coated on the outer surface (S300), and the coated steel wire is drawn while passing through the fixing die to be formed into a rectangular cross section. )

Then, after the drawn-molded steel wire passes through the lubricant, the drawing and torsion processing is carried out while passing through the rotary die in which the square groove is formed (S500), and the drawn and twisted steel wire is wound on the drum of the fire block. (S600) Then, the steel wire wound on the drum is cut to fit the set length or weight.

Hereinafter, an apparatus for manufacturing a steel grating twist bar used in the method for manufacturing a steel grating twist bar described above will be described with reference to the drawings.

FIG. 3 is a perspective view showing the entire system in the embodiment of the present invention, and FIG. 4 is a front view thereof.

As shown in this figure, the apparatus for manufacturing the twisting bar for steel grating is composed of a steel wire supply means 1, a steel wire drawing means 2 and a steel wire unwinding means (3).

The steel wire supply means 1 is composed of a first alignment transfer unit 10, a scale removing unit 11, a second alignment transfer unit 12, the steel wire drawing means 2 is lubricated with a fixed die 20 The unit 21, the rotary die assembly 22, the steel wire winding means 3 is composed of a fire block 30 of a known structure.

Here, the first alignment transfer unit 10 is installed in the panel 102 fixed horizontally to the upper portion of the induction pipe 101 installed on the upper portion of the base 100 as shown in Figure 5 and 6 Ring 103, the first and second alignment rollers 104 and 105, and the third alignment roller 106 is installed in the guide pipe 101.

In addition, the induction pipe 101 is installed to be inclined at a predetermined angle by the support structure 107 in the upper portion of the base 100, to form a space in which the top is open so that the steel wire can be guided and the panel 102 is fixed In the lower part, the steel wire discharge space 108 is formed so that the induced steel wire can be discharged.

A ring 103 is fixed to the lower portion of the panel 102, and a first alignment roller 104 and a second alignment roller 105 are installed side by side at the top of the panel 102, and the first alignment roller 104 is disposed side by side. In the adjacent position, the first oil tool 109 is formed to guide the steel wire W flowing through the ring 103.

At this time, the ring 103 is fixed to a plurality of supports 109 fixed to the bottom surface of the panel 102 to prevent the steel wire (W) released from the steel wire roll to swing, the steel wire 90 is the first oil tool ( 109) can be flowed smoothly.

As described above, the induction pipe 101 is inclined and the panel 102 on which the ring 103 and the first alignment roller 104 and the second alignment roller 105 are installed is wound on the upper portion of the bundle of steel wires WB. Will be located.

As the ring 103 and the first oil tool 109 is positioned above the steel wire bundle WB, the steel wire W can be easily released from the wire bundle.

On the other hand, the first alignment roller 104 and the second alignment roller 105 is installed side by side to guide the steel wire (W) that is guided to the ring 103 and the first oil tool 109 is drawn in tension To form.

Here, the third alignment roller 106 supplies the steel wire W to the scale removing unit 11 in succession to the second alignment roller 105.

Meanwhile, the scale removing unit 11 includes a second oil tool 111 and a plurality of scrapers 112 fixed on the table 110 as shown in FIGS. 7 to 9.

Here, the second oil tool 111 is located on the same horizontal line as the steel wire (W) that is guided to the third alignment roller 106 and drawn out to guide the scraper (112).

The scraper 112 includes a plurality of horizontal scrapers 113, 113a, 113b, and 113c fixed directly on the table 110, and a plurality of vertical screws fixed to the bracket 114 installed at the rear of the table 110. It consists of scrapers 115 and 115a. At this time, the plurality of scrapers 112 is smoothly removed on the outer periphery of the steel wire (W) that is formed and transported by a wire brush.

In addition, the horizontal scraper (113, 113a, 113b, 113c) has a cylindrical outer circumferential surface is a plurality of zigzag fixed to both sides of the steel wire (W) supplied is able to remove the scale.

The vertical scrapers 115 and 115a have a cylindrical outer circumferential surface and at least two of them are disposed up and down on the front surface of the bracket 114 to remove the scale while rubbing the upper surface and the bottom surface of the steel wire W being transferred. Transfer it to the alignment transfer part (12).

In this case, long holes 116 and 116a and 117 and 117a are formed in the table 110 and the bracket 114 to adjust the positions of the horizontal scrapers 113a and 113b and the vertical scrapers 117 and 117a.

Therefore, the scale is removed between the horizontal scraper and the vertical scraper by the long grooves 116 and 116a and 117 and 117a, and thus the frictional force acting on the transported steel wire W can be adjusted.

Meanwhile, as shown in FIG. 10, the second alignment transfer part 12 includes an idle roller 120, a pair of guide rollers 121 and a capstan roller 122 installed between the scale remover 11, and the like. It is composed of a plurality of alignment roller 130.

At this time, the sag of the steel wire W entering the second alignment transfer unit 12 from the scale removing unit 11 is prevented.

Here, the pair of guide rollers 121 are vertically entered to guide the steel wire w to the capstan rollers 122 accurately.

And, the pair of capstan roller 122 is composed of a lower roller (122a) and the upper roller (122b) as shown in Figure 11 is installed in a position matching the horizontal direction in which the steel wire is drawn, the lower roller (122a) ) Is rotatably fixed to the holder 129, the upper roller (122b) is lowered by the pneumatic cylinder 126 while the fixing piece 124 is guided to the guide groove 125 of the holder 129 The steel wire W is sandwiched and transported between the rollers 122a.

On the other hand, the alignment roller 130 is composed of a plurality of lower roller 131 and the upper roller 131a in the same horizontal position as the capstan roller 122 as shown in Figure 12 coincides with the horizontal direction in which the steel wire is drawn While being installed in the position, the lower roller 131 is rotatably fixed to the holder 132, the upper roller 131a is the fixing piece 133 is guided to the guide groove 134 of the holder 132 while holding the holder ( 132 by the handle 135 is fastened to the screw is fastened by a steel wire (W) between the lower roller 131 is sandwiched and transported.

And, as shown in Figure 13, the fixing die 20 has a square groove 200 is formed in the center, the fixing groove 201 is formed in the upper portion of the outer peripheral surface of the front wall 210 of the lubrication portion 21 Is installed.

Here, the stationary die 20 in which the square groove 200 is formed is primarily shaped to form a cross section of the steel wire W introduced into the rotary die assembly 22 for torsional molding.

In addition, the front wall 210 of the lubrication portion 21 is formed with a cylindrical protrusion 212 in which the bolt fastening hole 211 is formed while forming a space for accommodating the fixed die 20, FIG. As shown in (a) of the end of the bolt 213 fastened to the bolt fastening hole 211 is introduced into the fixing groove 128 of the fixing die 20 is inserted into the protrusion 212 fixed die 20 ) Is installed.

In addition, the fixed die 20 may be formed with a circular groove 214 through which the steel wire (W) is introduced as shown in (b) of FIG. In the case where the circular groove 214 is formed in the fixed die 20, the section forming and torsion forming of the steel wire W is performed by the rotary die assembly 22.

At this time, the lubrication portion 21 is formed as a substantially rectangular wall to form a coating film on the surface of the steel wire (W) to prevent breakage due to friction with the die, to improve the mobility of the steel wire (W) The conventional lubricating composition used for the purpose is embedded.

Here, the rotary die assembly 22 is a worm 220 and worm gear 221, the rotating shaft 222, the rotary die 223, the cover 224, the outlet 225, as shown in Figure 15 to 17 It consists of.

At this time, the worm 220 and the worm gear 221 transmits the reduced power from the hydraulic motor not shown.

In addition, the rotating shaft 222 has a through hole 233 through which the steel wire W formed in the center is formed, and is coupled to the worm gear by the key 226, so that the bearing (for the rear wall 227 of the lubrication unit 21) is formed. 228 is installed to transmit power to the rotating die 223 while rotating.

On the other hand, the rotary die 223 has a square groove 229 is formed in the center, the key groove 230 is formed on the outer peripheral surface is coupled to the key 226 on the front of the worm gear 221 and the rotating shaft 222 It is rotatably supported by the bearing 231 and is installed in the rear wall 227 by the cover 224.

At this time, the square groove 229 of the rotary die 223 fixed to the rotary shaft 222 is located on the same horizontal axis as the through-hole 233 of the rotary shaft 222.

Here, the cover 224 is formed with a through hole 232 through which the steel wire (W) passes and is fixed to the inner side of the rear wall 227 by a bolt 229, the outlet 225 is a screw (on one protrusion) 234 is formed, the through-hole 235 through which the steel wire (W) passes in the center is formed so that the screw 234 is fastened to the rotation shaft 222 is fixed. The discharge port 225 fixed to the rotating shaft 222 is located on the same horizontal axis as the through hole 233 of the rotating shaft 222 in the through hole 235.

In addition, the bull block 30 has the same configuration as a conventional drawing machine, that is, the same structure as a drum-type wire drawing machine, which is wound by fixing the drawn wire (W) to a draw block. Description is omitted.

Below the bull block 30 is provided with a guide 300 and a storage container 301 for accommodating the steel wire (W) is completed drawing.

In the present invention configured as described above, the ends of the steel wires W released from the steel wire bundles WB include a first alignment transfer unit 10 and a second alignment transfer unit 12, a fixed die 20, and a rotary die ( It is fixed to the bull block 30 through 223.

Thereafter, when the bulb block 30 is driven and a tensile force is applied to the steel wire W, the steel wire is taken out from the wire bundle WR, and drawing and twisting are started.

At this time, the wires released from the wire bundle (WB) is the first alignment roller 104 and the second alignment roller 105 through the ring 103 and the first oil tool 111 of the first alignment transfer unit 10. It is guided, turned in the third alignment roller 106 through the inside of the guide pipe 101 and discharged to the outside of the guide pipe, and then supplied to the scale removing unit 11.

Here, the steel wire (W) supplied to the descaling unit 11 is a plurality of horizontal scrapers (113, 113a, 113b, 113c) and vertical scrapers through the second oil tool 111 fixed to the table 110 first The scale of the surface is removed while passing through (115, 115a).

The scaled wire W is guided to the idle roller 120 and supplied to the second alignment transfer part 12.

In addition, the steel wire (W) supplied to the second alignment transfer portion 12 is guided to the guide roller 121, the capstan roller 122 and the alignment roller 123 sequentially to reach the drawing position.

The steel wire W having reached the drawing position is first drawn out through a fixed die 20 into a predetermined quadrangular shape, and then passes through the rotary die 223 in a process in which a lubricant is coated and transferred from the coating portion 21. It is gradually torsionally processed.

In the torsion processing by the rotary die 223, the power decelerated from the hydraulic motor (not shown) including the speed reducer is transmitted to the worm 220 so that the worm gear 221 rotates gradually with more reduced power. The key groove 230 of the rotary die 223 is inserted into the key 226 coupled between the worm gear 221 and the rotary shaft 222 so that the rotary die 223 rotates together with the worm gear 221. While twisting the wire (W).

As described above, the machining process is performed so that the fixed die 20 merely serves to guide the steel wire, and a drawing die is installed immediately before the rotary die 223 to cover the steel wire W coated on the coating part 21. ) May be to be drawn and torsion, or the drawing and torsion may be simultaneously performed in one rotary die 223.

1: steel wire advanced means 2: steel wire drawing means
3: Steel wire drawing means 10: First alignment is transmitted
11 scale removal unit 12 second alignment transfer unit
20: fixed die 100: base
101: guide tube 102: panel
103: ring 104: first alignment roller
105: second alignment roller 106: third alignment roller
107: support structure 108: discharge space
110: table 111: the first utensils
112: scraper 113, 113a, 113b, 113c: horizontal scraper
114: Bracket 115, 115a: Vertical scraper
116,: 116a: Long slot 117, 117a: Long slot
120: children roller 121: guide roller
122: capstan roller 123: alignment roller
124: fixing piece 125: guide groove
126: pneumatic cylinder 128: fixed groove
129: fixing rod 131: lower roller
132: upper roller 133: fixed piece
134: guide groove 135: handle
200: square groove 211: bolt fastening hole
212 protrusion 213 bolt
214: Circular groove 220: Warm
221: Worm gear 222:
223: rotating die 224: cover
225: outlet 226: key
228: bearing 229: square groove
230: keyway 234: screw
235: through

Claims (3)

Aligning while drawing the wires from the bundle of wires wound by the pulling tension of the fire block (S100);
Removing the scale on the outer circumference of the steel wires aligned and transported by a scale removing unit (S200);
Neutralizing and externally coating the oxidized foreign matter on the surface of the steel wire while passing through the lime water container and the dryer with the scale removed (S300);
Drawing the coated steel wire while passing through the fixed die and forming a cross section having a square shape (S400);
After the drawn-formed steel wire is passed through the lubricant, the step of drawing and twisting while passing through the rotary die formed with a square groove (S500);
Winding the steel wire of which drawing and torsion processing is completed to a drum of a fire block (S600);
Method for producing a twisting bar for steel grating, characterized in that it comprises a.
The method of claim 1,
In step S200 of removing the scale on the outer circumference of the steel wire,
The scale removing unit is formed with a plurality of horizontal scrapers and a plurality of vertical scrapers are fixed in a zigzag by a cylindrical wire brush, the steel wire W through the plurality of scrapers characterized in that the scale of the outer peripheral surface of the steel wire (W) is removed Manufacturing method of twist bar for steel grating.
The method of claim 1,
In the step (S400) and the draw-formed steel wire is passed through the lubricant, the steel wire is drawn to form a square cross-section while passing through the lubricant, the drawing and torsion processing in the step (S500) ,
A fixed die is formed on the front wall with the lubricant interposed therebetween, and a steel wire passes through a drawing die where a rotating die is formed on the rear wall, the cross section of which is drawn in a square shape on the fixed die, and then continuously twisting in the rotating die. Method of producing a twist bar for steel grating, characterized in that the steel wire is formed with a twist bar.

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