CN212238736U - Numerical control pipe bender - Google Patents

Abstract

A numerical control pipe bending machine belongs to the technical field of pipe bending devices, and solves the technical problem of bending and forming pipes by the pipe bending machine. Force testing mechanism, the bending force testing mechanism includes a bracket, a test frame and a pressure sensor; the bending mechanism is arranged in front of the middle of the bed, and the bending mechanism includes a support, a support frame, a swing frame, a first reducer, a first motor and a roller; The follow-up mechanism is arranged behind the middle of the bed, and the follow-up mechanism includes a second motor, a second reducer, a screw support seat, a screw rod and a screw nut. The utility model provides a numerical control pipe bending machine, through the bending mechanism driven by the servo motor servo reducer, through the numerical control system to control the coordinated movement of the follow-up mechanism and the transverse feed mechanism, the body pipe of the workpiece to be bent is measured from before bending, After modifying the parameters, the same body is bent and processed to realize the precise and efficient bending process of one mold and multiple arcs by rotary rolling.

Description

A CNC pipe bending machine

technical field

The utility model belongs to the technical field of pipe bending devices, in particular to a numerical control pipe bending machine.

Background technique

Pipe bending machines currently used in the market: Most pipe bending machines in the prior art use molds to form by centering rotation, and replace the molds to achieve multiple arc segments with different curvature radii on one workpiece, that is, the so-called one mold and one arc. It is difficult to realize multiple arcs in one mode. Production efficiency is low. In the prior art, a three-roller rolling method is also used to make a pipe bender, but it is difficult to bend workpieces with a smaller radius of curvature. Due to the large tolerance range of the national standard for profile pipe fittings, welding and heat treatment during the pipe making process, each workpiece is caused. The blank produces different bending stresses, so that the bent workpiece has elastic deformation and poor consistency, and needs to be shaped after bending.

The frame member of the bus body is formed by bending a rectangular tube, which is composed of several arc segments with different curvature radii in a plane. The bending of the workpiece requires a precise and stable bending process with changing radians, and the forming workpiece requires a small amount of deformation.

Utility model content

In order to overcome the deficiencies of the prior art and solve the technical problem of bending and forming pipes by a pipe bender, the utility model provides a bending mechanism which adopts a mixed structure form of rotary encircling bending and roller rolling, and is driven by a servo motor and a servo reducer. After the numerical control system controls the coordinated movement of the follow-up mechanism and the transverse feed mechanism, the precise bending forming of rotary rolling is realized. The swing frame equipped with rollers in the bending mechanism driven by the servo motor servo reducer rotates, and the bending radius can be easily changed arbitrarily and accurately. It is a CNC pipe bending machine that realizes the precise bending process of measuring the body of the workpiece to be bent before bending, and bending and processing the same body after correcting the parameters.

The utility model is realized by the following technical solutions.

A numerical control pipe bending machine, which includes a bed, a transverse feed mechanism, a bending mechanism and a follow-up mechanism, the transverse feed mechanism is arranged at the rear end of the bed, and the follow-up mechanism and the bending mechanism are arranged in the middle of the bed , the transverse feed mechanism drives the slider to drive the pipe to be bent horizontally along the bed through the ball screw transmission mechanism, wherein:

The head end of the bed is provided with a bending force testing mechanism. The bending force testing mechanism includes a bracket, a test frame and a pressure sensor. The bracket is horizontally arranged below the head end of the bed, and the test frame is arranged in the middle of the bracket. The motor ball screw telescopic rod presses the pipe through the servo motor ball screw transmission mechanism, and a pressure sensor is provided at the contact point between the head of the servo motor ball screw telescopic rod and the pipe to be bent;

The bending mechanism is arranged in front of the middle of the bed. The bending mechanism includes a support, a support frame, a swing frame, a first reducer, a first motor and a roller wheel. The support is installed horizontally forward in the middle of the bed. The support Two linear slide rails are arranged horizontally and forwardly on the side near the head end of the bed; the support frame is arranged in an L shape, the support frame includes a vertical part and a horizontal part, and the inner cylinder penetrates the vertical part in the horizontal direction and the support, the inner tube is set as a square tube or a circular tube, the right end face of the inner tube is installed in the outer tube, the inner tube is installed on the support through the outer tube; the right side of the vertical part is installed on the linear slide rail It slides back and forth along the linear slide rail, the upper part of the left side of the vertical part is provided with an ear bracket, the upper part of the horizontal part is provided with a swing frame vertically upward, and two roller axles are arranged parallel to the vertical direction on the swing frame, and the roller axle There are rollers installed on it, and the to-be-bent ends of the pipes to be bent pass through the cavity between the inner cylinder and the two rollers in turn. The upper part of the swing frame between the two roller shafts is provided with a rotating shaft. on the ear frame; a first motor is arranged below the horizontal part, the motor rotor of the first motor is connected with the power output shaft of the reducer, the power output shaft of the reducer is connected with the swing frame, and the first motor drives the swing frame to rotate sports;

The follow-up mechanism is arranged at the rear of the middle of the bed. The follow-up mechanism includes a second motor, a second reducer, a screw support seat, a ball screw and a screw nut. The motor rotor of the second motor and the second reducer are connected. The power input shaft is connected, the second speed reducer is installed on the rear side of the screw support seat, the screw support seat is installed under the middle of the bed, the power output shaft of the second speed reducer is connected with the screw rod through the expansion joint sleeve, There is a high-load bearing seat at the contact position between the screw support seat and the screw rod. The screw rod is installed with a screw nut matched with the screw rod. The screw nut is installed on the screw nut sleeve, and the screw nut sleeve is fixed on the screw nut sleeve. On the plate, the screw nut sleeve fixing plate is installed on the support frame, and the second motor drives the bending mechanism to reciprocate horizontally back and forth through the ball screw structure.

Further, the pressure sensor is electrically connected to the signal input end of the data processor and the PLC controller,

Further, the first motor is arranged vertically upward, and the second motor is arranged horizontally forward.

Compared with the prior art, the beneficial effects of the present utility model are as follows:

The utility model provides a numerically controlled pipe bending machine, which adopts a mixed structure of rotary encircling bending and roller rolling forming through numerical control system control, and a bending mechanism, a follow-up mechanism and a transverse feed mechanism which are driven by a servo motor and a servo reducer. The matching movement can realize the precise bending forming of rotary rolling. The swing frame equipped with rollers in the bending mechanism rotates, and the bending radius can be easily and accurately changed. The bending force testing mechanism is used to measure the body tube of the workpiece before bending, and after correcting the parameters, the body is bent to realize a precise and efficient bending process of one mold and multiple arcs of a workpiece with arbitrary curvature radius and variable arc bending, and improve the forming accuracy and processing efficiency of the workpiece. It is suitable for a wide range of pipes and has high economic benefits.

Description of drawings

Fig. 1 is the overall front view structure schematic diagram of the utility model;

Fig. 2 is the top view structure schematic diagram of Fig. 1;

Fig. 3 is the left side view structure schematic diagram of Fig. 1;

FIG. 4 is a schematic diagram of the front structure of the bending mechanism;

Fig. 5 is the top-view structure schematic diagram of Fig. 4;

Fig. 6 is the left side view structure schematic diagram of Fig. 4;

Fig. 7 is the right-side structural schematic diagram of Fig. 4;

Fig. 8 is the front view structure schematic diagram of the follower mechanism;

FIG. 9 is a schematic top view of the structure of FIG. 8 .

1 is the bed, 2 is the transverse feed mechanism, 3 is the bending mechanism, 31 is the support, 32 is the linear guide, 33 is the support frame, 34 is the ear frame, 35 is the swing frame, 36 is the outer cylinder, and 37 is the inner cylinder 38 is the first reducer, 39 is the first motor, 310 is the roller shaft, 311 is the rotating shaft, 312 is the roller, 4 is the follow-up mechanism, 41 is the second motor, 42 is the second reducer, 43 is the Screw support seat, 44 is a high-load bearing seat, 45 is a screw rod, 46 is a screw nut, 47 is a screw nut sleeve, 48 is a screw nut sleeve fixing plate, 49 is an expansion connection sleeve, and 5 is a bending force testing mechanism. 51 is a bracket, and 52 is a test frame.

Detailed ways

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Unless otherwise specified, the examples are in accordance with conventional experimental conditions. In addition, for those skilled in the art, under the premise of not departing from the spirit and scope of the present invention, various modifications or improvements made to the material components and consumptions in these embodiments belong to the protection of the present invention. scope.

As shown in FIG. 1, a CNC pipe bending machine includes a bed body 1, a transverse feed mechanism 2, a bending mechanism 3 and a follow-up mechanism 4. The transverse feed mechanism 2 is arranged at the rear end of the bed body 1, The follower mechanism 4 and the bending mechanism 3 are arranged in the middle of the bed 1, and the transverse feed mechanism 2 drives the slider to drive the pipe to be bent horizontally along the bed 1 through the screw nut transmission mechanism, wherein:

The head end of the bed 1 is provided with a bending force testing mechanism 5, the bending force testing mechanism includes a bracket 51, a test frame 52 and a pressure sensor, the bracket 51 is horizontally arranged below the head end of the bed 1, and the test frame 52 is arranged on the bracket 51 In the middle part, the pipe to be bent is placed on the bracket 51 and the test frame 52. The test frame 52 is provided with a servo motor ball screw transmission mechanism, the servo motor ball screw presses the pipe material, and the servo motor ball screw head is installed with pressure sensor;

The bending mechanism 3 is arranged in front of the middle of the bed 1. The bending mechanism 3 includes a support 31, a support frame 33, a swing frame 35, a first reducer 38, a first motor 39 and a roller 312. The support 31 is horizontally arranged. The front is installed in the middle of the bed 1, and two linear slide rails 32 are horizontally and forwardly arranged on the side of the support 31 close to the head end of the bed 1; The vertical part and the horizontal part, the inner tube 37 penetrates the vertical part and the support 31 in the horizontal direction, the inner tube 37 is set as a square tube or a circular tube, the right end surface of the inner tube 37 is installed in the outer tube 36, and the inner tube 37 passes through The outer cylinder 36 is mounted on the support 31; the right side of the vertical part is mounted on the linear slide rail 32 and slides back and forth along the linear slide rail 32; A swinging frame 35 is arranged vertically upward on the upper part of the swinging frame 35, and two roller shafts 310 are arranged in parallel along the vertical direction on the swinging frame 35. A roller 312 is installed on the roller shafts 310, and the to-be-bent ends of the pipe to be bent pass through the inner part in turn. The cavity between the cylinder 37 and the two rollers 312, the upper part of the swing frame 35 between the two roller shafts 310 is provided with a rotating shaft 311, and the upper part of the rotating shaft 311 is installed on the ear frame 34; the lower part of the horizontal part A first motor 39 is provided, the motor rotor of the first motor 39 is connected with the power output shaft of the reducer 38, the power output shaft of the reducer 38 is connected with the swing frame 35, and the first motor 39 drives the swing frame 35 to rotate;

The follow-up mechanism 4 is arranged at the rear of the middle of the bed 1. The follow-up mechanism 4 includes a second motor 41, a second reducer 42, a screw support seat 43, a screw rod 45 and a screw nut 46. The motor rotor is connected with the power input shaft of the second reducer 42, the second reducer 42 is installed on the rear side of the screw support seat 43, the screw support seat 43 is installed under the middle of the bed, the second reducer 42 The power output shaft is connected with the screw rod 45 through the expansion and tightening connection sleeve 49, the high-load bearing seat 44 is provided at the contact position between the screw rod support seat 43 and the screw rod 45, and the screw rod 45 is installed with a screw nut matched with the screw rod 45. 46, the nut 46 is installed on the nut sleeve 47, the nut sleeve 47 is fixedly installed on the fixing plate 48 of the nut sleeve, the fixing plate 48 of the nut sleeve is installed on the support frame 33, and the second motor 41 passes through the wire The screw-and-nut structure drives the bending mechanism 3 to reciprocate horizontally back and forth.

Further, the pressure sensor is electrically connected to the signal input end of the data processor and the PLC controller.

Further, the first motor 39 is arranged vertically upward, and the second motor 41 is arranged horizontally forward.

The principle and use process of the present utility model are as follows:

First, place the head and tail ends of the pipe to be bent on the bracket 51, the middle of the pipe to be bent is installed on the test frame 52, the test frame 52 applies a tangential force, and the pressure sensor converts the detected data signal by the data processor and then inputs it In the PLC controller, the PLC controller corrects the displacement process parameters of the bending mechanism 3, the follower mechanism 4 and the transverse feed mechanism 2 according to the input pipe data;

Next, remove the pipe to be bent from the bending force testing mechanism 5, then install the end of the pipe to be bent on the transverse feed mechanism 2, and pass the head end of the pipe to be bent through the inner cylinder 37 and the two rollers 312 in turn. The cavity between them, the transverse feed mechanism 2 drives the pipe to be bent to move horizontally along the bed 1;

Again, the first motor 39 and the second motor 41 are automatically activated, the first motor 39 drives the swing frame 35 to rotate, the rollers 312 provided on the swing frame 35 bend the pipe to be bent, and the second motor 41 drives the support frame 33 in the horizontal direction. Longitudinal feed motion in the forward direction to form the pipe to be bent;

Finally, the transverse feeding mechanism 2, the bending mechanism 3 and the follower mechanism 4 are reset, and the above steps are repeated to perform the bending forming of the next pipe to be bent.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the technical field can easily think of changes or changes within the technical scope disclosed by the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (3)

1. A numerically controlled pipe bending machine, comprising a bed (1), a transverse feed mechanism (2), a bending mechanism (3) and a follower mechanism (4), the transverse feed mechanism (2) being arranged on the bed The tail end of the body (1), the follower mechanism (4) and the bending mechanism (3) are arranged in the middle of the bed (1), and the transverse feed mechanism (2) drives the slider to be bent through the ball screw nut transmission mechanism. The pipe material moves horizontally along the bed (1), and is characterized by: The head end of the bed (1) is provided with a bending force testing mechanism (5), the bending force testing mechanism includes a bracket (51), a test frame (52) and a pressure sensor, and the bracket (51) is horizontally arranged on the bed (1). ) below the head end, the test frame (52) is arranged in the middle of the bracket (51), the pipe to be bent is placed on the bracket (51) and the test frame (52), and the test frame (52) is equipped with a servo motor ball screw to extend A pressure sensor is provided at the contact between the head of the servo motor ball screw telescopic rod and the pipe to be bent; The bending mechanism (3) is arranged in front of the middle of the bed (1), and the bending mechanism (3) includes a support (31), a support frame (33), a swing frame (35), a first reducer (38), The first motor (39) and the roller (312), the support (31) is installed horizontally forward in the middle of the bed (1), and the support (31) is horizontal on the side of the side close to the head end of the bed (1). Two linear slide rails (32) are arranged parallel to the front; the support frame (33) is arranged in an L-shape, the support frame (33) includes a vertical part and a horizontal part, and the inner cylinder (37) penetrates vertically along the horizontal direction The inner tube (37) is set as a square tube or a circular tube, the right end face of the inner tube (37) is installed in the outer tube (36), and the inner tube (37) is installed through the outer tube (36) On the support (31); the right side of the vertical part is mounted on the linear slide rail (32) and slides back and forth along the linear slide rail (32), and the upper part of the left side of the vertical part is provided with an ear bracket ( 34), a swing frame (35) is arranged vertically above the horizontal part, and two roller shafts (310) are arranged in parallel along the vertical direction on the swing frame (35), and rollers (310) are installed on the roller shaft (310). 312), the to-be-bent end of the pipe to be bent passes through the cavity between the inner cylinder (37) and the two rollers (312) in turn, and the upper part of the swing frame (35) between the two roller shafts (310) is provided with a rotating shaft (311), the upper part of the rotating shaft (311) is installed on the ear bracket (34); the lower part of the horizontal part is provided with a first motor (39), the motor rotor of the first motor (39) and the reducer ( 38) is connected with the power output shaft, the power output shaft of the reducer (38) is connected with the swing frame (35), and the first motor (39) drives the swing frame (35) to rotate; The follow-up mechanism (4) is arranged behind the middle of the bed (1), and the follow-up mechanism (4) includes a second motor (41), a second reducer (42), a screw support seat (43), a screw The rod (45) and the nut (46), the motor rotor of the second motor (41) is connected with the power input shaft of the second reducer (42), and the second reducer (42) is installed on the screw support seat (43) On the rear side of the machine, the lead screw support seat (43) is installed under the middle of the bed, and the power output shaft of the second reducer (42) is connected to the lead screw (45) through the expansion connection sleeve (49), and the lead screw supports A high-load bearing seat (44) is arranged at the contact position between the seat (43) and the screw rod (45), and a screw nut (46) matched with the screw rod (45) is installed on the screw rod (45), and the screw nut (46) ) is installed on the nut sleeve (47), the nut sleeve (47) is fixedly installed on the nut sleeve fixing plate (48), and the nut sleeve fixing plate (48) is installed on the support frame (33), The second motor (41) drives the bending mechanism (3) to reciprocate horizontally back and forth through the ball screw and nut structure. 2 . The numerically controlled pipe bending machine according to claim 1 , wherein the pressure sensor is electrically connected to the signal input end of the PLC controller. 3 . 3 . The numerically controlled pipe bending machine according to claim 1 , wherein the first motor ( 39 ) is arranged vertically upward, and the second motor ( 41 ) is arranged horizontally forward. 4 .

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