CN111389978A

CN111389978A - Numerical control pipe bender

Info

Publication number: CN111389978A
Application number: CN202010252540.4A
Authority: CN
Inventors: 王奇明; 经威; 贺文东; 王素伟; 王艳
Original assignee: TAIYUAN TAILI ELECTROMECHANICAL NEW TECHNOLOGY CO LTD
Current assignee: TAIYUAN TAILI ELECTROMECHANICAL NEW TECHNOLOGY CO LTD
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-07-10

Abstract

The invention relates to a numerical control pipe bender, which belongs to the technical field of pipe bending devices and solves the technical problem of bending and forming pipes by the pipe bender, and comprises a lathe bed, a transverse feeding mechanism, a bending mechanism and a follow-up mechanism, wherein the head end of the lathe bed is provided with a bending force testing mechanism, and the bending force testing mechanism comprises a bracket, a testing frame and a pressure sensor; the bending mechanism is arranged in front of the middle part of the lathe bed and comprises a support, a support frame, a swinging frame, a first speed reducer, a first motor and a roller; the servo mechanism is arranged behind the middle part of the lathe bed and comprises a second motor, a second speed reducer, a screw rod supporting seat, a screw rod and a nut. According to the numerical control pipe bender, the bending mechanism driven by the servo motor servo reducer controls the follow-up mechanism and the transverse feeding mechanism to move in a matched mode through the numerical control system, a workpiece body pipe to be bent is measured before bending, the same body is bent after parameters are corrected, and the one-die multi-arc accurate and efficient bending process of rotary rolling bending is achieved.

Description

Numerical control pipe bender

Technical Field

The invention belongs to the technical field of pipe bending devices, and particularly relates to a numerical control pipe bending machine.

Background

Bending machine that the present market used: in the prior art, most pipe benders use a mold, rotate around the center to form, and replace the mold to realize a plurality of arc sections with different curvature radiuses on one workpiece, namely one mold and one arc, and one mold and multiple arcs are difficult to realize. The production efficiency is low. In the prior art, a three-roller rolling mode is also used for manufacturing a pipe bender, but workpieces with smaller curvature radius are difficult to bend, and because the national standard tolerance range of sectional pipe fittings is large, welding, heat treatment and the like in the pipe manufacturing process cause different bending stress to be generated on each workpiece blank, the bent workpieces have elastic deformation and poor consistency and need to be bent and shaped.

The bus body framework component is formed by bending a rectangular pipe and consists of a plurality of arc sections with different curvature radiuses in one plane. The workpiece bending requires a precise and stable bending process with constantly changing radian, and the formed workpiece requires very small deformation.

Disclosure of Invention

In order to overcome the defects of the prior art and solve the technical problem of pipe bending and forming of a pipe bending machine, the invention provides a bending mechanism which adopts a mixed structure form of rotary enclosing bending and roller rolling and forming and is driven by a servo motor servo reducer, and the matching motion of a servo mechanism and a transverse feeding mechanism is controlled by a numerical control system to realize rotary rolling precision bending and forming. The swing frame with the rollers in the bending mechanism driven by the servo motor and the servo reducer performs rotary motion, so that the bending radius can be changed freely and accurately. The numerical control pipe bender realizes the accurate bending process of measuring the pipe of the workpiece body to be bent before bending, and bending and processing the same body after correcting parameters.

The invention is realized by the following technical scheme.

The utility model provides a numerical control pipe bender, it includes lathe bed, transverse feed mechanism, bending mechanism and follower, transverse feed mechanism sets up in the tail end of lathe bed, and follower and bending mechanism set up in the middle part of lathe bed, and transverse feed mechanism drives the slider through ball screw drive mechanism and drives the tubular product of treating the bending along lathe bed horizontal motion, wherein:

the bending force testing mechanism comprises a support, a testing frame and a pressure sensor, the support is horizontally arranged below the head end of the lathe body, the testing frame is arranged in the middle of the support, a servo motor ball screw telescopic rod is arranged on the testing frame, a pipe is jacked through a servo motor ball screw transmission mechanism, and the pressure sensor is arranged at the contact position of 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 part of the lathe bed, and comprises a support, a support frame, a swinging frame, a first speed reducer, a first motor and rollers, wherein the support is horizontally and forwards arranged in the middle part of the lathe bed, two linear slide rails are horizontally and forwards arranged on the side surface of the support close to the head end of the lathe bed in parallel, the support frame is arranged in an L shape and comprises a vertical part and a horizontal part, an inner cylinder penetrates through the vertical part and the support along the horizontal direction, the inner cylinder is arranged in a square pipe or a circular pipe, the right end surface of the inner cylinder is arranged in an outer cylinder, the inner cylinder is arranged on the support through the outer cylinder, the right side surface of the vertical part is arranged on the linear slide rails and slides back and forth along the linear slide rails, an ear frame is arranged on the upper part of the left side surface of the vertical part, the swinging frame is vertically and upwards arranged above the horizontal part, two roller shafts are arranged on the swinging frame in parallel along the vertical direction, rollers are arranged on the roller shafts, the ends to-be bent of a pipe to-be-bent sequentially penetrate through a cavity between the inner cylinder and the two roller shafts, the two roller shafts are provided with a rotating shaft, the;

the servo mechanism is arranged at the rear of the middle part of the lathe bed and comprises a second motor, a second speed reducer, a screw rod supporting seat, a ball screw and a nut, a motor rotor of the second motor is connected with a power input shaft of the second speed reducer, the second speed reducer is installed on the rear side face of the screw rod supporting seat, the screw rod supporting seat is installed below the middle part of the lathe bed, a power output shaft of the second speed reducer is connected with the screw rod through an expansion connecting sleeve, a high-load bearing seat is arranged at the contact position of the screw rod supporting seat and the screw rod, the screw rod is provided with the nut matched with the screw rod, the nut is installed on the nut sleeve, the nut sleeve is fixedly installed on a nut sleeve fixing plate, the nut sleeve fixing plate is installed on the supporting frame, and the second motor drives the bending mechanism to horizontally.

Further, the pressure sensor is electrically connected with the signal input end of the data processor and the P L C controller,

further, the first motor is arranged vertically upwards, and the second motor is arranged horizontally forwards.

Compared with the prior art, the transmission has the beneficial effects that:

the numerical control pipe bender provided by the invention adopts a mixed structure form of rotary bending and roller rolling forming by a numerical control system, and realizes rotary rolling precision bending forming by the matching motion of a bending mechanism and a servo mechanism which are driven by a servo reducer of a servo motor and a transverse feeding mechanism. The swing frame with the rollers in the bending mechanism rotates, so that the bending radius can be changed freely and accurately. The bending force testing mechanism is used for measuring the pipe of the body before the workpiece is bent, the body is bent after parameters are corrected, the accurate and efficient one-die multi-arc bending process for variable-arc bending of any curvature radius of the workpiece is realized, and the forming precision and the machining efficiency of the workpiece are improved. The range of applicable pipes is large, and the economic benefit is high.

Drawings

FIG. 1 is a schematic overall front view of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a left side view of the structure of FIG. 1;

FIG. 4 is a front view of the bending mechanism;

FIG. 5 is a schematic top view of the structure of FIG. 4;

FIG. 6 is a left side view of the structure of FIG. 4;

FIG. 7 is a schematic diagram of the right side view of the structure of FIG. 4;

FIG. 8 is a schematic front view of the follower mechanism;

fig. 9 is a schematic top view of fig. 8.

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

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the examples follow conventional experimental conditions. In addition, it will be apparent to those skilled in the art that various modifications or improvements can be made to the material components and amounts in these embodiments without departing from the spirit and scope of the invention as defined in the appended claims.

As shown in fig. 1, the numerical control pipe bender includes a bed 1, a transverse feeding mechanism 2, a bending mechanism 3 and a following mechanism 4, wherein the transverse feeding mechanism 2 is arranged at the tail end of the bed 1, the following mechanism 3 and the bending mechanism 4 are arranged at the middle part of the bed 1, the transverse feeding mechanism 2 drives a slide block to drive a pipe to be bent to move horizontally along the bed 1 through a lead screw nut transmission mechanism, wherein:

the bending force testing device comprises a lathe bed 1, and is characterized in that a bending force testing mechanism 5 is arranged at the head end of the lathe bed 1, the bending force testing mechanism comprises a support 51, a testing frame 52 and a pressure sensor, the support 51 is horizontally arranged below the head end of the lathe bed 1, the testing frame 52 is arranged in the middle of the support 51, a pipe to be bent is placed on the support 51 and the testing frame 52 in a lapping mode, a servo motor ball screw transmission mechanism is arranged on the testing frame 52, a servo motor ball screw is used for jacking the pipe, and the head of the servo motor ball screw is;

the bending mechanism 3 is arranged in front of the middle of the lathe bed 1, the bending mechanism 3 comprises a support 31, a support frame 33, a swing frame 35, a first speed reducer 38, a first motor 39 and rollers 312, the support 31 is horizontally and forwardly arranged in the middle of the lathe bed 1, two linear sliding rails 32 are horizontally and forwardly arranged on the side surface of the support 31 close to the head end of the lathe bed 1 in parallel, the support frame 33 is L-shaped, the support frame 33 comprises a vertical part and a horizontal part, an inner cylinder 37 penetrates through the vertical part and the support 31 along the horizontal direction, the inner cylinder 37 is a square pipe or a circular pipe, the right end surface of the inner cylinder 37 is arranged in an outer cylinder 36, the inner cylinder 37 is arranged on the support 31 through an outer cylinder 36, the right side surface of the vertical part is arranged on the linear sliding rails 32 and slides back and forth along the linear sliding rails 32, an ear frame 34 is arranged on the upper part of the left side surface of the vertical part, the swing frame 35 is vertically and upwardly arranged on the horizontal part, two roller shafts 310 are arranged on the swing frame 35 in parallel along the vertical direction, the roller shafts 312 are provided with rollers, the rollers 312, the shafts 35, the shafts 311 of the rollers are arranged on the roller shafts, the bent ends of the pipes to be bent sequentially penetrate through a cavity between the inner cylinder 37 and the inner cylinder shafts, the first speed reducer 35, the first motor 39 is connected with the;

the follow-up mechanism 4 is arranged at the rear part of the middle part of the lathe bed 1, the follow-up mechanism 4 comprises a second motor 41 and a second speed reducer 42, the bending mechanism comprises a screw rod supporting seat 43, a screw rod 45 and a screw nut 46, a motor rotor of a second motor 41 is connected with a power input shaft of the second speed reducer 42, the second speed reducer 42 is installed on the rear side face of the screw rod supporting seat 43, the screw rod supporting seat 43 is installed below the middle portion of the lathe bed, a power output shaft of the second speed reducer 42 is connected with the screw rod 45 through an expansion connecting sleeve 49, a high-load bearing seat 44 is arranged at the contact position of the screw rod supporting seat 43 and the screw rod 45, the screw nut 46 matched with the screw rod 45 is installed on the screw rod 45, the screw nut 46 is installed on a screw nut sleeve 47, the screw nut sleeve 47 is fixedly installed on a screw nut sleeve fixing plate 48, the screw nut sleeve fixing plate 48 is installed on the supporting frame 33, and the second motor 41 drives the.

Further, the pressure sensor is electrically connected with a signal input end of the data processor and the P L C controller.

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

The principle and the using process of the invention are as follows:

firstly, placing the head end and the tail end of a pipe to be bent on a support 51, installing the middle part of the pipe to be bent on a testing frame 52, applying a tangential force on the testing frame 52, converting a detected data signal by a pressure sensor through a data processor and inputting the converted data signal into a P L C controller, and correcting displacement process parameters of a bending mechanism 3, a follow-up mechanism 4 and a transverse feeding mechanism 2 by the P L C controller according to the input pipe data;

secondly, the pipe to be bent is taken down from the bending force testing mechanism 5, then the tail end of the pipe to be bent is installed on the transverse feeding mechanism 2, the head end of the pipe to be bent sequentially penetrates through the inner cylinder 37 and the cavity between the two rollers 312, and the transverse feeding mechanism 2 drives the pipe to be bent to horizontally move along the lathe bed 1;

thirdly, the first motor 39 and the second motor 41 are automatically started, the first motor 39 drives the swinging frame 35 to rotate, the roller 312 arranged on the swinging frame 35 bends the pipe to be bent, and meanwhile, the second motor 41 drives the supporting frame 33 to do longitudinal feeding motion along the horizontal forward direction to form the pipe to be bent;

and finally, resetting the transverse feeding mechanism 2, the bending mechanism 3 and the follow-up mechanism 4, and repeating the steps to bend and form the next pipe to be bent.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a numerical control bending machine, it includes lathe bed (1), transverse feed mechanism (2), crooked mechanism (3) and follower (4), transverse feed mechanism (2) set up in the tail end of lathe bed (1), and follower (3) and crooked mechanism (4) set up in the middle part of lathe bed (1), and transverse feed mechanism (2) drive slider drives through ball screw nut drive mechanism and treats crooked tubular product along lathe bed (1) horizontal motion, its characterized in that:

the bending force testing mechanism (5) is arranged at the head end of the lathe bed (1), the bending force testing mechanism comprises a support (51), a testing frame (52) and a pressure sensor, the support (51) is horizontally arranged below the head end of the lathe bed (1), the testing frame (52) is arranged in the middle of the support (51), a pipe to be bent is placed on the support (51) and the testing frame (52), a servo motor ball screw telescopic rod is arranged on the testing frame (52), and the pressure sensor is arranged at the contact position of 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 machine body (1), the bending mechanism (3) comprises a support (31), a support frame (33) and a swing frame (35), a first speed reducer (38), a first motor (39) and a roller (312), the support (31) is horizontally and forwards arranged in the middle of the machine body (1), two linear sliding rails (32) are horizontally and forwards arranged on the side surface of the support (31) close to the front end side of the machine body (1) in parallel, the support frame (33) is L-shaped, the support frame (33) comprises a vertical part and a horizontal part, an inner cylinder (37) penetrates through the vertical part and the support (31) along the horizontal direction, the inner cylinder (37) is arranged to be a square pipe or a circular pipe, the right end surface of the inner cylinder (37) is arranged in an outer cylinder (36), the inner cylinder (37) is arranged on the support (31) through the outer cylinder (36), the right side surface of the vertical part is arranged on the linear sliding rails (32) and slides back and forth along the linear sliding rails (32), an upper part of the left side surface of the vertical part is provided with an ear frame (34), a swing frame (35) is arranged above the swing frame, a rotating shaft of the swing frame (35) is connected with a rotating shaft of the roller (311) of the first motor, a rotating shaft (311) of the first speed reducer (35), the rotating shaft (311) and a rotating shaft (311) which is connected with a rotating shaft (35), the rotating shaft (311) of the rotating shaft (35), the rotating shaft of the rotating shaft (311) of the roller (35);

the servo mechanism (4) is arranged behind the middle part of the lathe bed (1), the servo mechanism (4) comprises a second motor (41), a second speed reducer (42), a lead screw supporting seat (43), a lead screw (45) and a nut (46), a motor rotor of the second motor (41) is connected with a power input shaft of the second speed reducer (42), the second speed reducer (42) is arranged on the rear side surface of the lead screw supporting seat (43), the lead screw supporting seat (43) is arranged below the middle part of the lathe bed, the power output shaft of the second speed reducer (42) is connected with the lead screw (45) through an expansion connecting sleeve (49), a high-load bearing seat (44) is arranged at the contact position of the lead screw supporting seat (43) and the lead screw (45), the nut (46) matched with the lead screw (45) is arranged on the lead screw (45), the nut (46) is arranged on a nut sleeve (47), and the nut sleeve (47) is fixedly arranged on a nut sleeve fixing plate (48), the nut sleeve fixing plate (48) is installed on the supporting frame (33), and the second motor (41) drives the bending mechanism (3) to horizontally reciprocate back and forth through a ball screw nut structure.

2. The CNC tube bender according to claim 1, wherein said pressure sensor is electrically connected to the signal input of the P L C controller.

3. The numerical control bender according to claim 1, characterized in that: the first motor (39) is arranged vertically upwards, and the second motor (41) is arranged horizontally forwards.