CN202861074U - Pipe clamping device - Google Patents

Abstract

A pipe clamping device is characterized by comprising a bend rotating arm, a wheel die, a ball screw and a main clamping die. One end of the bend rotating arm is sleeved on a rotating shaft, and a sliding rail is formed along the length direction on the arm surface which extends out horizontally. The wheel die is fixedly arranged at the upper end of the rotating shaft, and a first bend-shaped cavity is formed in the wheel die. The ball screw is arranged inside the bend rotating arm in a rotary mode, and the ball screw is connected with a power mechanism through a transmission device. A sliding block is arranged on the bottom of the main clamping die, a second bend-type cavity which is matched with the first bend-type cavity in the wheel die to achieve clamping of pipes is formed in the side portion of the main clamping die, the sliding block is arranged on the sliding rail, and a lower end nut is sleeved on the ball screw and slides along the sliding rail under driving of the ball screw. According to the pipe clamping device, a traditional hydraulic cylinder mode is replaced by the pipe clamping mode that a motor is used for driving the ball screw to feed, the uniformity of machining accuracy is guaranteed, energy consumption is low, noise is small, and working efficiency is high. The clamping force to the pipes is maintained by the characteristics of the ball screw, compared with a cylinder, a good effect is achieved, and damage to devices is not prone to happening.

Description

a clamping device

technical field

The utility model relates to the field of pipe bending processing, in particular to a pipe clamping device for clamping pipe fittings.

Background technique

During the bending process of the pipe bending machine, the pipe fittings need to be clamped to prevent the pipe fittings from being deformed during processing. During the clamping process, the pipe clamp will be subjected to great pressure, therefore, its power mechanism needs to provide enough force to the pipe clamp to maintain the clamping of the pipe. Existing pipe bending machines usually use hydraulic cylinders as the power mechanism for pipe fixtures. For example, the Chinese Utility Model Patent No. 200820187068.5 discloses a clamp head locking device for a pipe bender. The device includes connecting earrings, two connecting fork plates and two locking blocks. An earring connecting hole is respectively opened on the top, and the lock block is connected with the connecting fork plate through the earring connecting hole, and the initial angle between the two connecting fork plates is 55 to 65 degrees. The locking device uses an oil cylinder as the power mechanism, the piston rod of the oil cylinder pushes the connecting earring, and then pushes the two locking blocks to move through the two connecting fork plates, so as to lock the upper and lower clamp pieces of the clamp head of the pipe bender , because when the piston rod pushes the connecting earring, if the initial included angle of the two connecting fork plates is small, the piston rod needs a large thrust when pushing the connecting earring, thus causing the piston rod to be prone to bending damage. Therefore, the starting angle of the two connecting fork plates of the clamp head locking device is set to 55 to 65 degrees, which effectively reduces the thrust of the oil cylinder for pushing the lock block, making the piston rod less prone to bending damage.

However, the clamping device of the above-mentioned patent directly uses a hydraulic cylinder as a power mechanism, and the force for maintaining the clamping of the pipe is also provided by the cylinder, which makes the piston rod of the cylinder bear a large force and is prone to damage. In addition, the use of hydraulic cylinders as the power mechanism is not easy to keep the equipment clean, and it also needs to be equipped with a cumbersome oil supply system, and the work efficiency is also low.

Contents of the invention

The technical problem to be solved by the utility model is to provide a clamping device with low energy consumption, low noise and high working efficiency in view of the above-mentioned technical situation.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a clamping device, which is characterized in that it comprises:

A curved pipe arm, one end of which is sleeved on a rotating shaft, and a slide rail is formed on the horizontally extending arm surface along the length direction;

The wheel mold is fixed on the upper end of the rotating shaft and above the elbow arm, and the wheel mold is provided with a first elbow cavity;

A ball screw is rotatably arranged in the elbow arm and connected with the power mechanism through a transmission device;

A main clamping mold with sliders at the bottom, a second elbow cavity that cooperates with the first elbow cavity on the wheel mold to clamp pipes is opened on its side, and the slider is slidably set on the elbow On the slide rail of the pipe pivot arm, the nut at the lower end is sleeved on the ball screw, and driven by the ball screw, it slides along the slide rail, thereby driving the feed of the main clamping die.

As an improvement, concave sliding grooves corresponding to the sliding rails are formed on both sides of the lower part of the sliding block.

Further improvement, a screw nut containing balls is set on the ball screw, and the surface of the ball screw is provided with a corresponding raceway, and the screw nut is connected with the lower end of the slider and can push the slider. feed.

Finally, the power mechanism is a motor, and the transmission device is a gear transmission device.

Compared with the prior art, the utility model has the advantage that the clamping mode of the motor-driven ball screw feed is used instead of the traditional hydraulic cylinder, which can ensure the consistency of machining accuracy during operation and save the maintenance of the hydraulic system And clean work, low energy consumption, low noise, high work efficiency. In addition, using the characteristics of the ball screw to maintain the clamping force on the pipe, compared with the oil cylinder, the effect is better and it is less likely to cause damage to the device.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is a structural diagram of a screw nut;

Fig. 4 is a structural diagram of a screw nut;

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

As shown in the figure, a clamping device includes a main clamping die 1, a wheel die 6, a pipe bending arm 2, a ball screw 3, a rotating shaft 7 and a power mechanism 4, etc., wherein one end of the pipe bending arm 2 is covered Set on a rotating shaft 7, a slide rail 21 is formed along the length direction on the horizontally protruding arm surface, and the ball screw 3 is rotatably arranged in the elbow arm 2 through a bearing, such as below the slide rail 21 , and is connected with the gear transmission 5, and the gear transmission 5 is connected with the power mechanism 4; the power mechanism 4 is a motor, and the motor is fixed on the side of the gear transmission 5, and the gear transmission 5 is placed in the elbow arm 2 , is connected with one end of the ball screw 3; the wheel mold 6 is fixed on the upper end of the rotating shaft 7 and above the elbow arm 2, and the wheel mold 6 is provided with a first elbow cavity 61, and the main clamping mold 1 The bottom of the bottom is provided with a slider 12, and its side is provided with a second elbow cavity 11 that cooperates with the first elbow cavity 61 on the wheel mold 6 to realize the clamping of the pipe fittings, and the pipe fittings are clamped between the above two In the through hole formed when the cavity is closed; the two sides of the lower part of the slider 12 are formed with concave chute corresponding to the slide rail 21, and the slider 12 is slidably arranged on the slide rail 21 of the elbow arm 2 , and slide along the slide rail 21 under the drive of the power mechanism 4, and then drive the feeding of the main clamping die 1; the ball screw 3 is provided with a screw nut 31 containing balls, and the surface of the ball screw 3 is provided with Corresponding to the raceway 32 , the lower end of the slider 12 passes through the slide rail 21 and connects with the screw nut 31 sleeved on the ball screw 3 , and the feed of the slider 21 is driven by the rotation of the ball screw 3 .

In this way, the feed of the slider can be precisely controlled by the motor, thereby realizing the clamping of the pipe fittings, and the characteristics of the ball screw are used to effectively maintain the clamping force of the pipe fittings and avoid the stress on the pipe clamping device Too large will cause rebound and affect the forming quality of pipe fittings.

Claims (4)

1. A clamping device, characterized in that it comprises: A curved pipe arm, one end of which is sleeved on a rotating shaft, and a slide rail is formed on the horizontally extending arm surface along the length direction; The wheel mold is fixed on the upper end of the rotating shaft and above the elbow arm, and the wheel mold is provided with a first elbow cavity; A ball screw, rotatably arranged in the elbow arm, and connected with the power mechanism through the transmission device; A main clamping mold with sliders at the bottom, a second elbow cavity that cooperates with the first elbow cavity on the wheel mold to clamp pipes is opened on its side, and the slider is slidably set on the elbow On the slide rail of the pipe pivot arm, the nut at the lower end is sleeved on the ball screw, and driven by the ball screw, it slides along the slide rail, thereby driving the feed of the main clamping die. 2. The clamping device according to claim 1, characterized in that the two sides of the lower part of the slider are formed with concave slide grooves corresponding to the slide rails. 3. The clamping device according to claim 2, characterized in that a screw nut containing balls is sleeved on the ball screw, the surface of the ball screw is provided with a corresponding raceway, and the screw nut It is connected with the lower end of the slider and can push the feed of the slider. 4. The clamping device according to claim 1, wherein the power mechanism is a motor, and the transmission device is a gear transmission device.

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