CN2468708Y - Press for forming U shaped articles - Google Patents

Abstract

U forming press is the main part of UOE large-diameter longitudinal welded pipe production line, including multiple gantry frames, multiple hydraulic cylinders, mold vertical plates, circular combined forming molds, guide plates and centering mechanisms, baffle mechanisms, and side pressure forming Cylinder, mold opening mechanism, synchronous mechanism, two beams and active guide plate mechanism. Each gantry is equipped with a hydraulic cylinder, and the inner side of each gantry is equipped with a side pressure forming hydraulic cylinder. Two beams are vertically arranged in multiple gantry frames, and circular combined molding molds are respectively fixed on the two beams. The two ends are equipped with mold opening mechanism respectively. The utility model has the advantages of simple structure, high precision and the like.

Description

U forming press

The utility model relates to a processing machine for metal pipes, in particular to a forming press which can press the full length of a steel plate into a U-shape at one time in the production process of UOE straight seam welded pipes.

U-shaped press is the main component of UOE large-diameter longitudinal welded pipe production line, and is the key equipment for producing special pipes for transporting oil, natural gas, and gas. In the production process of large-diameter straight seam steel pipes, the steel plate is pressed into a U shape by a U-shaped press, and then pressed into an O-shaped tube by an O-shaped press, and finally the slotted steel pipe is welded. At present, the U-forming presses used in some countries have shortcomings such as low degree of automation, unreasonable gantry frame structure, uneven pressure on steel plates, low precision, and low work efficiency. However, there is no U-forming press equipment in China.

The purpose of this utility model is to provide a U-forming press that presses the steel plate into a U-shape with high precision after the steel plate is pre-bent in the UOE large-diameter straight seam welded pipe production process.

The U forming press includes multiple gantry frames, and each gantry frame is composed of multiple steel plates. Two beams are vertically arranged in the multiple gantry frames, the two ends of each beam are respectively fixedly connected with two beam brackets, and the lower end of each beam bracket is respectively connected with the support shaft on the gantry base. A mold-opening mechanism is respectively installed at both ends of each beam, and the mold-opening mechanism is formed by a hydraulic cylinder driving a connecting rod, and the upper end of the connecting rod is connected with a corresponding beam shaft. An upper hydraulic cylinder is installed on the upper part of each gantry, and a mold seat is fixed on the piston of the upper hydraulic cylinder. The mold seat is fixedly connected with the upper end of the vertically arranged mold vertical plate, and the lower end of the mold vertical plate is fixedly connected with the mold. The mold is powered by the upper hydraulic cylinder. A side hydraulic cylinder is respectively installed on the corresponding position on the inner wall of each side of the gantry. The front end of the piston rod of each side hydraulic cylinder can be pressed against a round combined molding mold. On the rear end face of the circular combined molding die is fixed on the upper end face of the beam corresponding to it. A guide plate and a centering mechanism are installed in the two beams. The guide plate and the centering mechanism are composed of a bottom column with a semicircular opening and a plurality of rollers. The bottom column with a semicircular opening is fixed on the frame base , The roller is supported by a hydraulic device fixed on the frame base. When the upper mold is pressed down, it supports the steel plate, and at the same time ensures the circular and overall concentricity of the U-shaped bottom of the steel plate. After forming, the mold is lifted up, and the rollers hold up the tube blank under the action of the hydraulic device, and the motor drives the rollers to rotate. The tube blank is sent out of the U-shaped machine.

In order to limit the movement of the steel plate at the set position all the time when it enters the press, a baffle mechanism is installed, which consists of baffles installed on both sides of the frame and a row of rollers.

In order to ensure equal stress on both sides of the U-shaped steel plate, a synchronization mechanism is installed in the two beams. The synchronization mechanism achieves the synchronization of the work of the beams through the meshing of the toothed discs, thereby ensuring the synchronization of the side hydraulic cylinders on both sides and ensuring the U of the steel plate. Forming accuracy on both sides of the mold.

Because the utility model adopts the closed gantry frame, which is formed by stacking multiple steel plates, the utility model has a strong bearing capacity, is sturdy and durable, and because each gantry frame is equipped with an upper hydraulic cylinder, and the inner walls on both sides are respectively fixed. One side hydraulic cylinder, so it can ensure the down pressure of the mold and the force balance of the mold. In addition, the utility model is also equipped with a baffle mechanism, a guide plate, a centering mechanism, a mold opening mechanism and a synchronization mechanism, so it has excellent balance and synchronization, thereby ensuring the forming accuracy of the steel plate, thereby greatly improving the qualification of the product. efficiency, improved work efficiency, and reduced production costs.

Fig. 1 is the structural diagram of an embodiment of the utility model. Below in conjunction with accompanying drawing, the utility model is further described.

Example:

U forming press, including 7 gantry frames 1, 7 upper hydraulic cylinders 2, 14 side hydraulic cylinders 3, two beams 4, mold vertical plate 5, mold 6, baffle mechanism, mold opening mechanism, synchronization mechanism, Guide plate and centering mechanism and active guide plate mechanism. Among them, seven gantry frames 1 are arranged opposite to each other and arranged in parallel at intervals, and each gantry frame 1 is formed by stacking a plurality of steel plates. Seven upper hydraulic cylinders 2 are arranged on the upper ends of seven gantry frames 1, and the piston of each upper hydraulic cylinder 2 is fixedly connected with a mold seat 7. The upper end of mold vertical plate 5 is fixedly connected with 7 mold seats 7. The lower end of the mold vertical plate 5 is fixedly connected with the mold 6 . Two crossbeams 4 are 12 meters long, are installed in the frames of seven gantry frames 1, and the two ends of two crossbeams 4 are respectively fixed on two crossbeam supports 8, and the lower end of each crossbeam support 8 is respectively connected with the fixed set. Bearing 9 axles on the gantry 1 base 19 are connected. The 14 side hydraulic cylinders 3 are respectively fixed on the two sides of the 7 gantry frames 1, and the 14 side hydraulic cylinders 3 can simultaneously apply force to the corresponding circular combined molding die 10. The baffle mechanism is composed of a baffle 11 installed on both sides of the gantry frame and a row of rollers 12. After the steel plate 13 enters the U forming press, the baffle 11 and the rollers 12 will clamp and center the steel plate 13 under the action of the hydraulic cylinder. Guide plate and centering mechanism are made of lower mold 14 and a plurality of rollers 15, and lower mold 14 is the bottom column with semicircular opening, and the lower mold 14 of semicircular opening is fixed on the base 19 of gantry 1. The lower mold 14 plays the role of supporting the steel plate 13 when the mold 6 is pressed down, and ensures the circular and overall concentricity of the steel plate 13. After the mold 6 is pressed down to the lower mold 14 with a circular opening, it is fed by 14 side hydraulic cylinders 3. The upper circular combined molding die 10 of the two crossbeams 4 applies force to press the steel plate 13 into a U shape. After forming, the mold 6 is lifted up, and a plurality of rollers 15 hold up the tube blank under the action of the hydraulic device, and the motor drives it. The roller rotates to send the tube blank out of the U-shaped machine; the mold opening mechanism is composed of 4 pull rods 16 connected to the two ends of the two beams 4 and 4 hydraulic cylinders 17 driving the 4 pull rods 16. After the side pressure is formed, the two A crossbeam 4 and the combined molding mold 10 on it are pulled apart; the synchronous mechanism is composed of two groups of toothed discs 18, and the two groups of toothed discs 18 are respectively arranged between the two sides of the two crossbeams 4, and act synchronously on the crossbeam 4, which can ensure that both The side and side hydraulic cylinders work synchronously, so that the force on both sides of the U-shaped steel plate is equal, ensuring the forming accuracy of the steel plate 13; the active guide plate mechanism is composed of multiple rollers driven by the motor, and the steel plate is transported to the U through multiple rollers type press.

Claims (1)

1, forming U shaped articles forcing press comprises a plurality of portal frames (1), a plurality of hydraulic cylinder (2), a plurality of side hydraulic cylinder (3), two crossbeams (4), mould riser (5), mould (6), baffle mechanism, die opening mechanism, lazy-tongs, guide plate and centering machine and active guide agency gone up; It is characterized in that:

A, a plurality of portal frames (1) are oppositely arranged, and yi word pattern is arranged, a plurality of upward hydraulic cylinders (2) are separately positioned on the upper end of a plurality of portal frames (1), set firmly a mould seat (7) on the piston of hydraulic cylinder on each (2), fixedly connected with a plurality of mould seats (7) in the upper end of mould riser (5), fixedly connected with mould (6) in the lower end of mould riser (5), two crossbeams (4) are located in the frame of a plurality of portal frames (1), each crossbeam (4) is fixedlyed connected with the upper end of two above overarm braces (8) respectively, the lower end of each overarm brace (8) respectively be installed in portal frame (1) base (20) on bearing (9) axle be connected, a plurality of side hydraulic cylinders (3) are separately positioned on the top of two crossbeams (4), and be separately fixed on the madial wall of a plurality of portal frames (1), be fixed with corresponding round combined shaping mold (10) on the upper surface of two crossbeams (4) respectively, a plurality of side hydraulic cylinders (3) of a plurality of portal frames (1) both sides can be afterburning simultaneously on two circular combined shaping molds (10);

B, baffle mechanism are made up of two side plates (11) and row's running roller (12), and after steel plate (13) entered U type machine, running roller (12) clamped centering with steel plate (13) under the hydraulic cylinder effect;

C, guide plate and centering machine are made of bed die (14) and a plurality of running roller (15), a plurality of running rollers (15) and bed die (14) are separately fixed on the base (19) of portal frame (1), and a plurality of running rollers (15) can be sent U type machine at the pipe that lifts and will suppress the U type under the effect of hydraulic cylinder under the motor effect;

D, die opening mechanism are made up of at least 4 hydraulic cylinders (17) of 4 pull bars (16) that are connected two crossbeams (4) two ends and drive pull bar (16) at least, after the side pressure moulding, at least 4 pull bars (16) under the effect of at least 4 hydraulic cylinders (17) with two crossbeams (4) and on combined shaping mold (10) draw back;

E, lazy-tongs are made of two set fluted discs (18) engagement, and two set fluted discs (18) branch is located between the both sides of two crossbeams (4).

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