A wire straightening and feeding device for a prefabricated reinforced concrete pipe steel cage roll welding machine

Abstract

A straightening and wire-feeding device for a prefabricated reinforced concrete pipe and steel cage rolling welding machine. A straightening and wire-feeding device for a prefabricated reinforced concrete pipe and steel cage rolling welding machine is provided, which has a compact structure and can organically combine wire feeding and straightening without interfering with each other, thereby effectively avoiding secondary deformation during straightening and wire feeding. The device comprises a chassis, a drive motor, a belt drive assembly, and a guide roller assembly; a tension spring is provided on the floating box, one end of the tension spring being connected to the top cover of the chassis and the other end being connected to the corner of the top of the floating box away from the hinge axis; a downward pressure mechanism is also provided on the top of the floating box, which drives the floating box downward so that the floating gear in the floating box engages with the main transmission gear. The present invention can achieve the work of feeding the end head; and there will be no interference between the two working conditions, effectively avoiding secondary deformation.

Description

Technical Field

[0001] The invention relates to the technical field of concrete product processing equipment, in particular to a wire straightening and feeding device arranged in front of a steel cage rolling welding machine in a prefabricated reinforced concrete pipe. Background Art

[0002] Prefabricated reinforced concrete pipes require a prefabricated steel cage, which serves as the pipe's skeleton. The cage's structure consists of several straight bars arranged to form a cylindrical surface. After these bars are arranged on a cage roll welder, circular bars are placed around the cage and welded at the intersections, ultimately forming the complete cage structure. This process utilizes a conventional roll welder, which rotates while holding the straight bars. When laying the circular bars (for example, 36 straight bars are laid around the circumference of a cylinder), the roll welder pauses every 10° of rotation to weld the intersections. The roll welder then rotates another 10°, repeating the cycle.

[0003] Ring reinforcement is typically made of Φ6-16 hot-rolled ribbed steel bars, which possess a certain degree of plastic deformation, making them easy to wrap around. However, they also have numerous inherent defects, such as local warping (bending), pitting, flesh loss, scarring, peeling, and minor folding of the wire. These defects can cause the inlet channel of the seam welder to jump or "derail" during processing, hindering smooth processing. Furthermore, the resulting pipe has an uneven internal reinforcement cage structure, resulting in pipe defects. Therefore, the steel bars need to be straightened before being fed to the seam welder.

[0004] In the prior art, such as CN205887924U, a traceless straightening wire feeding device is provided for the purpose of generating no noise during the straightening process, achieving a fast straightening wire feeding speed, accurate wire feeding length, and preventing damage to the wire. The technical solution comprises: a base; a wire feeding frame mounted above the base; two straightening mechanisms disposed on both sides of the wire feeding frame on the base; a wire feeding mechanism mounted on the side of the wire feeding frame; motor plates mounted on both sides of the base; a motor fixed in the middle of the motor plate; a lower synchronous pulley mounted on the shaft end of the motor; the lower synchronous pulley being connected to the wire feeding mechanism via a synchronous belt; ... In summary, straightening roller groups are disposed at both ends of the wire feeding case, resulting in a relatively long device. Furthermore, during the straightening process, the straightening roller groups maintain a certain "contact pressure" on the steel bar. If the wire feeding mechanism forces the wire to be fed and the wire hardness is insufficient (cold-rolled steel bars have sufficient hardness, while hot-rolled steel bars have lower hardness), secondary bending deformation of the wire is easily caused.

[0005] How to force wire feeding at the coil head end without causing secondary deformation during wire feeding and straightening in response to the actual processing environment of hot-rolled steel bars has become a technical problem that needs to be solved in this field. Summary of the Invention

[0006] In response to the above technical problems, the present invention provides a straightening and wire feeding device for a prefabricated reinforced concrete pipe steel cage rolling welding machine with a compact structure that can organically combine wire feeding and straightening without interfering with each other, thereby avoiding secondary deformation during the effective straightening and wire feeding process.

[0007] The technical solution of the present invention is: a wire straightening and feeding device for a prefabricated reinforced concrete pipe steel cage rolling welding machine, comprising a machine box, a driving motor, a belt transmission group and a guide roller group;

[0008] At least two main shafts are arranged parallel to each other between the front and back walls of the lower part of the chassis; one end of each of the two main shafts extends out of the chassis, and main rollers are respectively arranged on the shaft heads of the two main shafts extending out of the chassis;

[0009] A large bevel gear is provided on one of the two main shafts, an input shaft is provided on the side wall of the chassis, a small bevel gear is provided on the head of the input shaft, and the small bevel gear is meshed with the large bevel gear;

[0010] The driving motor drives the input shaft through the belt transmission group; a clutch device is provided between the belt transmission group and the input shaft;

[0011] A main transmission gear is further provided on the two main shafts, an intermediate shaft is provided between the two main shafts, and an intermediate gear is provided on the intermediate shaft, and the intermediate gears are respectively engaged with the main transmission gears on the two main shafts;

[0012] A floating box is provided above each of the two main shafts, and the floating box is movably connected to the upper wall of the chassis via a hinged shaft; a floating shaft is provided in the floating box, one end of the floating shaft extends out of the chassis through an elongated hole, and auxiliary rollers are provided on the shaft heads of the floating shaft extending out of the chassis; a floating gear is also provided on the floating shaft;

[0013] The floating box is provided with a tension spring, one end of which is connected to the top cover of the chassis, and the other end is connected to the corner of the top of the floating box away from the hinge axis;

[0014] A pressing mechanism is also provided on the top of the floating box, and the pressing mechanism drives the floating box to move downward, so that the floating gear in the floating box is engaged with the main transmission gear.

[0015] The main roller and the auxiliary roller are respectively provided with steel bar grooves.

[0016] The pressing mechanism includes an adjusting screw, and the adjusting screw is connected and fixedly connected to a threaded sleeve on the top cover.

[0017] A compression spring is also provided between the lower end of the adjusting screw and the top surface of the floating box.

[0018] The clutch device is a clutch arranged between the large pulley and the input shaft in the belt transmission group.

[0019] A clutch device is provided between the belt transmission group and the input shaft, which is a tension pulley arranged on the outside of the belt for adjusting the belt tension.

[0020] The belt drive assembly includes a belt pulley fixedly arranged on the input shaft;

[0021] The belt pulley is in transmission connection with the active belt pulley on the motor via a belt.

[0022] This invention utilizes a two-stage reduction and two-stage clutch design, achieving a suitable feed speed ratio during wire feeding. A clutch device is incorporated into the first-stage reduction mechanism (i.e., the belt drive assembly), which, in conjunction with the second-stage clutch (i.e., the float box), enables switching between wire feeding and straightening operations. Specifically, when wire feeding is required, the first-stage clutch of the first-stage reduction mechanism engages, while the float box presses downward, allowing the main and auxiliary rollers to clamp and feed the rebar. When straightening is required, the float box rises, reducing the pressure between the auxiliary and main rollers, maintaining a certain distance between them. Simultaneously, the first-stage clutch of the first-stage reduction mechanism disengages, deactivating the main and auxiliary rollers. The rebar is then pulled along by the subsequent seam welder while being "shaped" between the main and auxiliary rollers. This sophisticated design seamlessly implements both wire feeding and straightening operations during seam welding of hot-rolled rebar. It can ensure that defects such as local torque and warping of the output steel bars are eliminated, and at the same time, it can realize the end feeding work; and there will be no interference between the two working conditions, effectively avoiding secondary deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention,

[0024] Figure 2 This is a schematic diagram of the side connection structure of the auxiliary roller and the main roller.

[0025] Figure 3 It is a structural diagram of the belt drive group.

[0026] Figure 4 This is a structural diagram of the floating tank in a detached state;

[0027] In the figure, 1 is the chassis, 1-1 is the top cover, 2 is the belt drive group, 2-1 is the belt pulley, 3 is the guide roller group, 4 is the main shaft, 41 is the main drive gear, 5 is the main roller, 6 is the large bevel gear, 7 is the input shaft, 8 is the small bevel gear, 9 is the clutch device, 10 is the intermediate shaft, 101 is the intermediate gear, 11 is the floating box, 12 is the articulated shaft, 13 is the floating shaft, 14 is the auxiliary roller, 15 is the floating gear, 16 is the tension spring, 17 is the downward pressure mechanism, 171 is the adjusting screw, 172 is the compression spring, 18 is the steel bar, and 19 is the tension pulley. DETAILED DESCRIPTION

[0028] This embodiment Figure 1-4 As shown, a wire straightening and feeding device for a prefabricated reinforced concrete pipe steel cage rolling welding machine includes a chassis 1, a driving motor and a belt transmission group 2 and a guide roller group 3. The guide roller group includes an auxiliary roller 14 and a main roller 5, and is characterized in that:

[0029] At least two main shafts 4 are arranged parallel to each other between the front and back walls of the lower part of the chassis 1; one end of each of the two main shafts 4 extends out of the chassis 1, and main rollers 5 are respectively arranged on the shaft heads of the two main shafts 4 extending out of the chassis;

[0030] A large bevel gear 6 is provided on one of the two main shafts 4, an input shaft 7 is provided on the side wall of the chassis 1, a small bevel gear 8 is provided on the head of the input shaft, and the small bevel gear 8 is meshed with the large bevel gear 6 (to achieve a second stage reduction transmission);

[0031] The driving motor drives the input shaft 7 through the belt drive group 2 (to achieve the first stage of reduction transmission); a clutch device 9 is provided between the belt drive group 2 and the input shaft 7;

[0032] A main transmission gear 41 is further provided on the two main shafts 4, an intermediate shaft 10 is provided between the two main shafts, and an intermediate gear 101 is provided on the intermediate shaft 10, and the intermediate gear 101 is respectively engaged with the main transmission gear 41 on the two main shafts (to achieve synchronous and co-directional rotation of the two main transmission gears; as shown in FIG. Figure 1 As shown, the main transmission gear on the left can be called the main gear, and the right one is called the main synchronous gear);

[0033] Above the two main shafts 4, there are respectively provided floating boxes 11, the floating boxes 11 being movably connected between the front and back walls of the upper portion of the chassis 1 via a hinge shaft 12; a floating shaft 13 is provided in the floating box 11, one end of the floating shaft 13 extending out of the chassis 1 through an elongated hole, and auxiliary rollers 14 are provided on the shaft heads of the floating shafts 13 extending out of the chassis 1; a floating gear 15 is also provided on the floating shaft 13;

[0034] The floating box 11 is provided with a tension spring 16, one end of which is connected to the top cover 1-1 of the chassis 1, and the other end is connected to the corner of the top of the floating box 13 away from the hinge shaft 12 (so that the floating gear in the floating box can be separated from the main transmission gear under the action of the tension spring);

[0035] A pressing mechanism 17 is further provided on the top of the floating box 11 , and the pressing mechanism 17 drives the floating box 11 to move downward, so that the floating gear 11 in the floating box 11 is engaged with the main transmission gear 41 .

[0036] The main roller and the auxiliary roller are each provided with a steel bar groove. (When the floating box is pressed down, the auxiliary roller moves downward at the same time, so that the auxiliary roller and the main roller can clamp the steel bar 18 and feed it.)

[0037] The pressing mechanism includes an adjusting screw 171 , which is connected to and fixedly connected to a threaded sleeve on the top cover.

[0038] A compression spring 172 is provided between the lower end of the adjusting screw 171 and the top surface of the floating box 13 (forming a flexible pressure to prevent the meshing gear pair from being damaged when the steel bar size defect is too large).

[0039] The clutch device 9 is a clutch arranged between the large pulley and the input shaft in the belt transmission group.

[0040] The belt drive group includes a belt pulley 2-1 fixedly arranged on the input shaft;

[0041] The belt pulley is in transmission connection with the active belt pulley on the motor via a belt.

[0042] A clutch device is provided between the belt drive group 2 and the input shaft 7, which is a tension pulley 19 arranged on the outside of the belt for adjusting the belt tension.

[0043] like Figure 3 As shown, when the tension pulley is disengaged from the belt (moving to the upper left), the belt is in a loose state and slips on the pulley; when the tension pulley moves to the lower right and tightens the belt, the belt drive group 2 works normally.

[0044] This invention utilizes a two-stage reduction and two-stage clutch design, achieving a suitable feed speed ratio during wire feeding. A clutch device is incorporated into the first-stage reduction mechanism (i.e., the belt drive assembly), which, in conjunction with the second-stage clutch (i.e., the float box), enables switching between wire feeding and straightening operations. Specifically, when wire feeding is required, the first-stage clutch of the first-stage reduction mechanism engages, while the float box presses downward, allowing the main and auxiliary rollers to clamp and feed the rebar. When straightening is required, the float box rises, reducing the pressure between the auxiliary and main rollers. This maintains a certain distance between the auxiliary and main rollers (based on the cross-sectional dimensions of the rebar). Simultaneously, the first-stage clutch of the first-stage reduction mechanism disengages, deactivating the main and auxiliary rollers. The rebar is then pulled along by the subsequent seam welder while being "shaped" between the main and auxiliary rollers. This sophisticated design seamlessly implements both wire feeding and straightening operations during seam welding of hot-rolled rebar. It can ensure that defects such as local torque and warping of the output steel bars are eliminated, and at the same time, it can realize the end feeding work; and there will be no interference between the two working conditions, effectively avoiding secondary deformation.

[0045] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some of the technical features therein according to the disclosed technical content without creative labor, and these substitutions and modifications are all within the protection scope of the present invention.

Claims

1. A wire straightening and feeding device for a prefabricated reinforced concrete pipe steel cage rolling welding machine, comprising a chassis (1), a drive motor and a belt transmission group (2) and a guide roller group (3), characterized in that: At least two main shafts (4) are arranged in parallel between the front and back box walls of the lower part of the chassis (1); one end of each of the two main shafts (4) extends out of the chassis (1), and main rollers (5) are respectively arranged on the shaft heads of the two main shafts (4) extending out of the chassis; A large bevel gear (6) is provided on one of the two main shafts (4), an input shaft (7) is provided on the side wall of the chassis (1), a small bevel gear (8) is provided on the head of the input shaft, and the small bevel gear (8) is meshed with the large bevel gear (6); The driving motor drives the input shaft (7) via the belt drive assembly (2); a clutch device (9) is provided between the belt drive assembly (2) and the input shaft (7); A main transmission gear (41) is also provided on the two main shafts (4), an intermediate shaft (10) is provided between the two main shafts, an intermediate gear (101) is provided on the intermediate shaft (10), and the intermediate gear (101) is respectively engaged with the main transmission gears (41) on the two main shafts; A floating box (11) is provided above each of the two main shafts (4), and the floating box (11) is movably connected to the box wall at the upper part of the chassis (1) through a hinge shaft (12); a floating shaft (13) is provided in the floating box (11), one end of the floating shaft (13) extends out of the chassis (1) through an elongated hole, and auxiliary rollers (14) are provided on the shaft heads of the floating shaft (13) extending out of the chassis (1); a floating gear (15) is also provided on the floating shaft (13); a tension spring (16) is provided on the floating box (11), one end of the tension spring (16) is connected to the top cover (1-1) of the chassis (1), and the other end is connected to the corner of the top of the floating box (11) away from the hinge shaft (12); A downward pressing mechanism (17) is also provided on the top of the floating box (11), and the downward pressing mechanism (17) drives the floating box (11) to move downward, so that the floating gear (15) in the floating box (11) is engaged with the main transmission gear (41); The main roller and the auxiliary roller are respectively provided with steel bar grooves; The pressing mechanism comprises an adjusting screw (171), and the adjusting screw is connected and fixedly connected to a threaded sleeve on the top cover.

2. The wire straightening and feeding device of the prefabricated reinforced concrete pipe steel cage rolling welding machine according to claim 1 is characterized in that: A compression spring (172) is further provided between the lower end of the adjusting screw (171) and the top surface of the floating box (11).

3. The wire straightening and feeding device of the prefabricated reinforced concrete pipe steel cage rolling welding machine according to claim 1 is characterized in that: The clutch device (9) is a clutch arranged between the large pulley and the input shaft in the belt drive group.

4. The wire straightening and feeding device of the prefabricated reinforced concrete pipe steel cage rolling welding machine according to claim 1, characterized in that: A tension pulley located outside the belt and used to adjust the belt tension is provided between the belt drive group (2) and the input shaft (7).

5. The wire straightening and feeding device of the prefabricated reinforced concrete pipe steel cage rolling welding machine according to claim 1, characterized in that: The belt transmission group includes a belt pulley (2-1) fixedly arranged on the input shaft; The belt pulley (2-1) is connected to the active belt pulley on the motor via a belt.

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