KR20060037112A - Welding device, welding method and production method of a shear reinforcing bar - Google Patents

Abstract

Shear reinforcing bars are manufactured by efficiently joining a stopper plate made of steel bars such as reinforcing bars and flat steel by a small welding device.

A pair of bars 6 clamped by the clamp means 4 by placing a pair of clamp means 4 facing each other with a pair of fixing stands 3 provided at a central portion in the longitudinal direction of the base 2. It is press-contacted from both sides to the stopper plate 7 held by the fixing stand 3 of the holder, and the pressure applied to the pair of fixing stands 3 is eliminated from each other, so that the fixing stand 3 does not have to be made large and rigid. Miniaturize The plurality of bars 6 are clamped by the clamping means 4, the plurality of bars 6 are held by the fixing bar 3, and the plurality of bars 6 are simultaneously joined to the stop plates 7. , Improves the bonding efficiency.

Description

Welding device, welding method and manufacturing method of shear reinforcement {WELDING DEVICE, WELDING METHOD AND PRODUCTION METHOD OF A SHEAR REINFORCING BAR}

1 is a side view showing a configuration of a welding apparatus of the present invention.

2 is a plan view showing the configuration of a welding apparatus.

It is a perspective view which shows the bonding state of a steel bar and a stopper plate.

4 is a partial perspective view showing the configuration of the holder and the clamp.

Fig. 5 is a side sectional view showing the structure of the clamp means.

6 is a perspective view showing a state where the shear reinforcement is installed.

<Description of the symbols for the main parts of the drawings>

1: welding device 2: base

3: Fixture 4: Clamping means

5: swaging means 6: steel bar

7: stop plate 8: stop plate holding portion

9: stopping plate supply means 10, 11: insulating member

12: holding unit 13: delivery cylinder

14: fixed clamp 15: movable clamp

16 cylinder 17 feed block

18: insulation member 19: steel bar holding portion

20: connecting member 21: clamp cylinder

22: cylinder holding block 23: feed block

24: bar guide 25: guide bar

27: swaging cylinder 28: guide shaft

29 support member 32 welding power source

40: main root 41: large back muscle

42: shear reinforcement

The present invention relates to a welding apparatus, a welding method, and a method of manufacturing a shear reinforcement, for example, for joining a stopper plate made of reinforcing bars and flat steel, such as a shear reinforcing bar connecting the main or reinforcement bars to increase the seismic performance of a structure. will be.

The reinforcing bar disposed inside the structure of the reinforced concrete structure is a ship that bears an axial force or a bending moment, and is disposed in a direction perpendicular to the main bar to secure the position of the main bar and transmit stress even in the right direction. It consists of a shear reinforcing bar that connects the power muscles and the main muscles and the back muscles. As this shear reinforcing muscle, various shear reinforcing muscles are shown, for example in patent document 1, patent document 2, etc. The shear reinforcing bar shown in Patent Literature 1 has a semicircular hook portion hooked to one end of a main rod, a steel rod having a screw portion at one end portion, and a stopper plate that can be detachably attached to the screw portion of the steel rod. The steel bar is placed between the main bars of one of the two main bars facing each other, and the fastening reinforcing bar is attached between the main bars by fixing the stop plate with a nut on the threaded portion of the steel bar. Moreover, the shear reinforcement steel which installs a screw part instead of a hook part and fixes a stopping plate with a nut to the screw part of both ends of a steel bar is also disclosed.

In addition, the shear reinforcing bar shown in Patent Literature 2 heats the front end of the steel bar by, for example, high frequency induction heating, instead of a stopper plate that is fixed by a nut to the threaded portions of the two ends of the steel bar. To compress in the axial direction to enlarge the outside diameter to form a stop.

As shown in Patent Literature 1, when attaching the shear reinforcing bar between the main bars, etc., if the stopper plate is fixed to the steel bar with a nut, fixing work of the stopper plate is not easy and requires a lot of work time. There is a disadvantage that the processing efficiency in the field is lowered.

In addition, as shown in Patent Literature 2, if the front end of the steel bar is heated by high frequency induction heating and subjected to hot swaging to form a stopping portion, it is difficult to create a large number of shear reinforcing bars in a short time, and thus the shear reinforcing bars There is a disadvantage that the unit price increases.

In order to cope with these disadvantages, the steel bar and the stopper plate can be joined together by friction welding to be integrated. When the rectangular plate is used as this stop plate, it is necessary to match the long side of the rectangular plate with the semicircular hook part, and the frictional joining performed by rotating the stop plate at high speed makes the length of the hook part and the stop plate longer. Matching the sides was not easy.

[Patent Document 1]

Japanese Patent Laid-Open No. Hei 10-196120

[Patent Document 2]

Japanese Patent Laid-Open No. 2000-257209

An object of the present invention is to provide a welding apparatus and a welding method capable of efficiently joining a stopper plate made of steel bars such as reinforcing bars and flat steel, and a method of manufacturing a shear reinforcement using the same.

The welding apparatus of the present invention includes a base, a pair of fixing stands provided at the central portion in the longitudinal direction of the base, a pair of clamp means provided at the outer side in the longitudinal direction of the base from each fixing stand, and a swaging connected to each clamp means ( a pair of holding plates each having a swaging means and a welding power source, each of which has a joining plate holding portion for holding a joined plate on an upper side thereof, wherein the clamping means has a fixed clamp, a movable clamp, and a cylinder portion; The feeding block is attached to the upper surface through an insulating member, and has a plurality of steel plate holding portions for holding the steel bar at a position facing the joining plate holding portion of the fixing table, and the movable clamp has a feeding block on the lower surface. Attached via an insulating member, having a plurality of steel guides in a position facing the steel plate holding portion of the fixed clamp, and installed in the cylinder portion It moves up and down by a clamp cylinder, and the swaging means has a swaging cylinder and two guide shafts, and the swaging cylinder has a piston rod connected to the clamp means, and moves the clamp means toward the fixing side. The steel bar clamped by the clamp means is pressed against the plate to be held on the fixing base, and the two guide shafts are provided to freely slide the pair of clamp means in the longitudinal direction of the base, and the welding power source It is characterized in that it is connected between the clamp of the clamp means and the stator.

It is preferable to have a joining plate supply means for supplying a joined plate to the said joining plate holding part in the said fixed base.

The welding method of the present invention is a welding method using the above welding apparatus, wherein a plurality of steel bars clamped by the clamping means are brought into contact with the joined plate held by the holding plate holding part of the fixing bar by moving from both sides of the pair of fixing bars. The steel bar and the joined plate are joined by flash welding.

A method for producing a shear reinforcement of the present invention is a method for producing a shear reinforcement by the welding method, the bonded part of the steel bar having a semi-circular hook portion on the side opposite to the joining end, the bonded plate holding portion of the holding plate The steel bar is clamped by the clamp means so as to coincide with the longitudinal direction of the steel bar, and the steel bar clamped by the clamp means is joined to the joined plate held by the holding plate holding part of the holder.

Another method for manufacturing the shear reinforcement of the present invention is a method for manufacturing a shear reinforcement by the welding method, the longitudinal direction of the steel stop plate having a stop plate made of square or oval flat steel on the opposite side to the joint end The steel bar is clamped by the clamp means in accordance with the longitudinal direction of the bonded plate held by the holding plate holding part of the stator, and the steel bar clamped by the clamping means is joined to the joined plate held by the holding plate holding part of the stator. It is characterized by.

Best Mode for Carrying Out the Invention

1 and 2 is a configuration diagram of the welding apparatus of the present invention, Figure 1 is a side view, Figure 2 is a plan view. As shown in the figure, the welding apparatus 1 includes a base 2, a pair of fixing stands 3 provided at a central portion in the longitudinal direction of the base 2, and a length of the base 2 from each fixing stand 3. It has a pair of clamp means 4 provided in the outer side of the direction, and the swaging means 5 connected to each clamp means 4, As shown in FIG. 3, it consists of steel bars, such as steel bars, and flat steel. Join the retaining plate (7). The pair of fixing stands 3 is provided with plural, for example, two sets of holding plate holding portions 8 for holding the holding plate 7 on the upper side of the clamping means 4 side, respectively. On the surface in the vicinity of the plate holding part 8, a stopper plate supply means 9 is provided. As shown in the perspective view of FIG. 4, this pair of fixing | fixed stand 3 is being fixed to the upper surface of the base 2 via the insulating member 11 in the state which inserted the insulating member 10. FIG. The stopper plate supply means 9 has a supply port at the lower end on the stopper plate holding part 8 side, and a holding part 12 for stacking and holding a plurality of stopper plates 7 and a holding part ( It has a delivery cylinder 13 which sends the lowest stopping plate 7 to the stopping plate holding part 8 among the stopping plates 7 hold | maintained by 12).

The clamp means 4 has a fixed clamp 14, a movable clamp 15, and a cylinder portion 16. As shown in FIG. 4, the fixed clamp 14 is provided at a position in which the supply block 17 is provided on the upper surface via the insulating member 18 and faces the stopper plate holding part 8 of the fixing table 3. A plurality of sets of, for example, two sets of bar holding portions 19 for holding the bars 6 are provided. The lower part of the connecting member 20 which has a concave shape is fixed to the side surface of the fixing clamp 14 opposite to the fixing table 3, and the clamp cylinder 21 of the cylinder part 16 is fixed to the upper part of the connecting member 20. As shown in FIG. A cylinder retaining block 22 having a) is attached. The movable clamp 15 has a feed block 23 attached to the lower surface via an insulating member, and as shown in the cross-sectional view of FIG. 5, the position facing the bar holder 19 of the fixed clamp 14. It has a bar guide 24. The piston rod of the clamp cylinder 21 is connected to the center of the upper surface of this movable clamp 15, and the two guide rods 25 are provided in the fitting part of the piston rod. The guide rod 25 slides freely in the guide hole 26 penetrating in the vertical direction of the cylinder holding block 22, and regulates the position when the movable clamp 15 moves in the vertical direction.

The swaging means 5 has a swaging cylinder 27 and two guide shafts 28. The swaging cylinder 27 is installed at the lower end of the support member 29 fixed to both ends of the base 2 in the longitudinal direction, and the connecting member whose piston rod 30 is fixed to the fixed clamp 14 ( 20) is connected to the bottom. The two guide shafts 28 pass through the guide holes 31 provided in the cylinder holding block 22 of the clamping means 4, and both ends thereof are fixed to the upper portion of the support member 29.

Two pairs of welding power supplies 32 are provided on both sides of the base 2, and two pairs of welding power supplies 32 are connected to one fixing table 3 and the fixing clamp 14, respectively. .

The operation | movement at the time of pulling the bar 6 and the stopper plate 7 by this welding apparatus 1 is demonstrated. First, a plurality of stop plates 7 are set in the holding part 12 of the stop plate supply means 9, and the stop plate 7 set in the holding part 12 by driving the delivery cylinder 13 is carried out. 1) is sent to each stopper plate holding part (8). In this state, the bars 6 are set one by one on the bar holders 19 of the fixed clamps 14 provided on the clamp means 4, and four bars 6 are placed on the upper surface of the two sets of fixed clamps 14. Keep on. Thereafter, the clamp cylinder 21 is driven to lower the movable clamp 15, and the steel bar 6 held by the fixed clamp 14 is pressed by the steel bar guide 24 to fix the clamp 14 and the movable clamp ( 15) clamp the bar (6). When it is confirmed that the bar 6 is clamped, the swaging cylinder 27 of the swaging means 5 is driven to advance the clamp means 4, and the front end of the clamped bar 6 is held by the stop plate. Lightly contact the retaining plate 7 held in the section 8. In this state, a voltage is applied from the pair of welding power supplies 32 provided on both sides of the base 2 to the fixing base 3 and the fixing clamp 14 fitted with the center of the base 2 respectively installed therein. A large current flows through the front end of 6) and the connection portion of the stopper plate 7 to intensively heat it. When the contact portion melts and becomes a spark by the heating, and the contact is broken, the clamp means 4 is further advanced to contact and scatter the flame between the front end of the steel bar 6 and the stop plate 7. Repeat (iii) to heat the contact. When the temperature of the contact portion of the steel bar 6 and the stop plate 7 reaches an appropriate temperature by this heating, the clamping stage 4 is rapidly advanced by the swaging means 27, and the steel bar 6 Pressure is rapidly applied to the contact portion of the stop plate 7 and the stopper plate 7 by swaging (upset).

When press-contacting, pressure is applied from both sides of the pair of fixing stands 3 to eliminate the pressure applied to the pair of fixing stands 3, so that the fixing stand 3 does not have to be made large and rigid. It can pressurize and the welding apparatus 1 can be miniaturized. In addition, when joining the steel bar 6 to the stop plate 7, a voltage is applied to the fixing table 3 and the fixing clamp 14 from a pair of welding power sources 32 provided on both sides of the base 2. Therefore, between the two bar plates 6 clamped by the clamp means 4 and the two stop plates 7 held by the two stop plate holding portions 8 of the fixing table 3, respectively. A balanced current can flow, and the bar 6 and the stopper plate 7 can be joined stably.

After pressing the bar 6 and the stop plate 7, the clamp of the bar 6 by the clamp means 4 is released, and the joined bar 6 and the stop plate 7 are removed, and the sway The clamping means 4 is retracted by the gong cylinder 27 to enter the joining of the next bar 6 and the stop plate 7 and the above operation is repeated.

In this way, for example, four bars 6 can be joined to the stopping plate 7 in one joining step, and the joining efficiency can be improved. In addition, as shown in FIG. 3 (b), the bar 6 having the semicircular hook portion 33 on the side opposite to the joining end is joined to the stopping plate 7, and as shown in FIG. In the case of manufacturing the shear reinforcing bar 42 connecting the 40 and the reinforcing bar 41, the stopping plate holding the hook part 33 of the bar 6 with the stop plate holding part 8 ( By clamping the bar 6 with the clamp means 4 in accordance with the lengthwise direction of 7), the locking plate 7 and the hook portion 33 of the bar 6 can be matched to each other to form a stable shape. Shear reinforcement 42 can be manufactured.

In addition, as shown in FIG.3 (c), the bar 6 which has the stopper plate 71 which consists of square flat steel on the opposite side to the junction end, or the opposite side to the junction end as shown in FIG.3 (d). Also in the case of joining the bar 6 having the stopping plate 72 made of elliptical flat steel to the stopping plate 7, the longitudinal directions of the stopping plates 71 and 72 are defined by the stopping plate holding unit ( 8, the stopping plate 71 provided in the stopping plate 7 and the bar 6 by clamping the bar 6 with the clamp means 4 in conformity with the longitudinal direction of the stopping plate 7 held by 8). , 72) can be joined in a securely matched direction.

In the welding apparatus of the present invention, a plate to be joined in which a pair of fixing stands provided at a central portion in the longitudinal direction of the base and a pair of clamping means are disposed to face each other, and the bar steel clamped by the clamping means is held at a pair of fixing portions. Since the pressure is applied from both sides to remove the pressure applied to the pair of fixing rods, it is not necessary to make the holding rods large and rigid, and the welding apparatus can be miniaturized.

In addition, by clamping a plurality of bars by clamping means and holding a plurality of joined plates as a fixed part, a plurality of bars can be joined to the joined plate at the same time, thereby improving the joining efficiency.

Moreover, by having the joining plate supply means for supplying a to-be-joined plate to a joining plate holding part in a fixed base, a to-be-joined board can be supplied automatically and joining efficiency can be improved more.

Further, the plurality of steel bars clamped by the clamping means are moved from both sides of the pair of fixing rods, and brought into contact with the bonded plate held by the holding plate holding portion of the fixing rod to join the bars and the bonded plate by flash welding. The joined plate can be bonded efficiently in a short time.

Moreover, the joining plate of the fixed board | substrate is a longitudinal direction of the hook part of the bar which has the semicircular hook part on the opposite side to the joining end, and the sticking plate of the bar which has the stop plate which consists of an oval or square flat steel on the opposite side to the joining end. The bars can be clamped by clamp means in accordance with the longitudinal direction of the joined plate held by the holding portion, and the steel bars clamped by the clamping means can be joined to the bonded plate held by the holding plate holding portion of the holder, thereby producing a sheared reinforcement member having a stable shape. .

Claims (5)

A base, a pair of fixing stands provided in the central portion of the base in the longitudinal direction of the base, a pair of clamp means provided in the longitudinal outward direction of the base from each fixing stand, swaging means connected to each clamp means, and a welding power source, The pair of fixing rods each have a plurality of joining plate holding portions for holding a joined plate on the upper side, The clamp means has a fixed clamp, a movable clamp, and a cylinder portion, wherein the fixed clamp has a steel bar for holding a bar at a position where a feed block is attached to an upper surface through an insulating member and facing a bonding plate holding part of the fixing bar. The clamp has a plurality of parts, and the movable clamp has a plurality of steel guides at positions where a power supply block is attached to the lower surface through an insulating member and faces the steel bar holding portion of the fixed clamp, To move up and down by The swaging means has a swaging cylinder and two guide shafts, and the swaging cylinder has a piston rod connected to the clamping means and moves the clamping means toward the fixing side to clamp the steel bar clamped by the clamping means to the fixing means. Press-bonded to the held plate to be joined, and the two guide shafts freely hold the pair of clamp means in the longitudinal direction of the base, And the welding power source is connected between the fixed clamp of the clamp means and the stator. The welding apparatus according to claim 1, further comprising: a joining plate supply means for supplying a joined plate to the joining plate holding part to the fixing table. A welding method using the welding device according to claim 1 or 2, wherein a plurality of steel bars clamped by the clamping means are moved from both sides of the pair of fixing rods to be in contact with the joined plate held by the holding plate holding portion of the fixing rod. Welding to the bar and the plate to be joined by flash welding. As a method for producing a shear reinforcement using the welding method according to claim 3, The bar hook portion of the bar having a semicircular hook portion on the opposite side to the joining end coincides with the longitudinal direction of the joined plate held by the joining plate holding portion of the stator and the bar is clamped by the clamping means, and the bar is clamped by the clamping means. The method of manufacturing a shear reinforcement, characterized in that the bonding to the bonded plate held by the holding plate holding portion of the fixing. As a method for producing a shear reinforcement using the welding method according to claim 3, The clamping means is made by matching the longitudinal direction of the stopping plate of the bar with the stopping plate made of square or oval flat steel on the opposite side to the joint end to match the longitudinal direction of the joined plate held by the holding plate holding part of the holder. And clamping the steel bar clamped by the clamping means to the joined plate held by the joining plate holding portion of the stator.

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