A rolling tube forming machine

Abstract

The invention discloses a rolling tube forming machine, which belongs to the field of metal processing technology. A rolling tube forming machine comprises a base, a first servo motor, a linear guide rail and a chuck are arranged on the base, a box body is slidably connected to the linear guide rail, a transmission mechanism is arranged at the lower end of the box body, an outer spindle is rotatably connected in the box body, a roller is rotatably connected to the circumferential side of one end of the outer spindle, an inner spindle is rotatably connected in the outer spindle, a limiting groove is provided on the circumferential side of one end of the inner spindle corresponding to the roller, an extrusion block is slidably connected in the limiting groove, a spring is also arranged in the limiting groove, a variable frequency motor and a second servo motor are also arranged in the box body, the variable frequency motor is connected to the outer spindle through a synchronous belt and a pulley, the second servo motor is connected to the inner spindle through a synchronous belt and a pulley, and a braking mechanism is also arranged in the box body. The extrusion block of the rolling tube forming machine of the invention is purely extruded with the workpiece, and the rolling effect is better and more stable.

Description

Technical Field

[0001] The invention belongs to the technical field of metal processing, and in particular relates to a rolling tube forming machine. Background Art

[0002] The processing of workpieces includes the step of sharpening, and workpieces are usually sharpened in the following two ways: 1. sharpening by rotary cutting and grinding; 2. sharpening by rotary extrusion. Existing sharpening equipment basically adopts the above two methods, but during the sharpening process, due to rotation, the cutting blade and the extrusion block will produce relative movement with the workpiece, which is very easy to distort the workpiece and even cause the workpiece to break. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a rolling tube forming machine. The present invention aims to solve the problem that the existing tipping equipment rotates and rolls the workpiece, which has relative motion and is very easy to twist and damage the workpiece.

[0004] To achieve the above-mentioned purpose, the present invention provides a rolled tube forming machine, including a base, which is arranged in an L-shape, and a first servo motor and two parallel linear guide rails are arranged on the horizontal section of the base, a box body slidably connected to the two linear guide rails is arranged above the base, and a transmission mechanism is arranged at the lower end of the box body, and the transmission mechanism can convert the rotation force of the first servo motor into a force for driving the box body to move horizontally along the linear guide rails, and a chuck for clamping the tube material is arranged in the vertical section of the base, and a through hole is opened at the position of the box body corresponding to the chuck, an outer spindle is rotatably connected in the box body, and a plurality of rollers are rotatably connected to the circumferential side of the outer spindle close to one end of the chuck, and a first driven pulley is arranged at the end of the outer spindle away from the chuck, and an inner spindle is rotatably connected in the outer spindle, and the inner spindle close to the chuck is rotatably connected. A limiting groove is provided on the circumferential side of one end, and an extrusion block pointing to the center of the circle is slidably connected in the limiting groove. A spring is also provided in the limiting groove, and the spring can make the extrusion block moving toward the center of the circle rebound and reset. The end of the inner spindle away from the chuck passes through the outer spindle and is provided with a second driven pulley. A frequency conversion motor and a second servo motor are also provided in the box body. A reducer is installed at the output end of the frequency conversion motor, and a first driving pulley is provided at the output end of the reducer. The first driving pulley is connected to the first driven pulley through a first synchronous belt. The output end of the second servo motor is provided with a second driving pulley, and the second driving pulley is connected to the second driven pulley through a second synchronous belt. A braking mechanism is also provided in the box body, and the braking mechanism can fix the inner spindle. An encoder is also provided in the box body.

[0005] By adopting this technical solution, when the pipe needs to be rolled and pointed, the pipe is first fixed with a chuck so that the pre-rolled end of the pipe is facing the inner spindle, and then the first servo motor is started to drive the box to move toward the pipe so that the extrusion block can roll the pipe. The inner spindle is then fixed with a brake mechanism. After the inner spindle is fixed, the variable frequency motor is started. Under the transmission action of the first driving pulley, the first synchronous belt and the first driven pulley, the variable frequency motor drives the outer spindle to rotate, and the roller rotates synchronously with the outer spindle. During the rotation process, the roller squeezes the extrusion block to move toward the pipe material, so that the extrusion block compresses the spring and rolls the pipe material. After the roller and the extrusion block are completely misaligned, the extrusion block will reset and rebound under the action of the spring, and then the variable frequency motor is turned off to release the fixation of the inner spindle by the brake mechanism, and then the second servo motor is started. Under the transmission action of the second driving pulley, the second synchronous belt and the second driven pulley, the second servo motor drives the inner spindle to rotate. When the inner spindle rotates to a preset rotation degree, the second servo motor is turned off so that the extrusion block can roll the pipe material from other angles, and then the inner spindle is fixed, the extrusion block rolls, the rolling angle is changed, and the cycle is repeated. The corresponding operations are the same as above until the pipe material and the rolling end are completely rolled. The above rolling is preliminary rolling. After the preliminary rolling is completed, the extrusion block is first placed in a free state without extrusion, and then the box is driven to move further toward the pipe material according to the requirement of the twist tip length, and then the secondary rolling is performed. After the secondary rolling, the pipe material with the target twist tip length is obtained.

[0006] Furthermore, the transmission mechanism includes a drive plate fixedly connected to the box body and a ball screw passing through the drive plate, the ball screw is threadedly connected to the drive plate, one end of the ball screw is fixedly connected to the output end of the first servo motor, and the other end of the ball screw is rotatably connected to the base.

[0007] Such a structural design can transmit the rotational force of the first servo motor to the box body through the transmission mechanism, thereby pushing the box body to move forward and backward along the linear guide rail.

[0008] Furthermore, the rollers and the extrusion blocks are distributed in a circular pattern.

[0009] With this structural design, the force is more evenly distributed during the pipe tipping process.

[0010] Furthermore, the rollers and extrusion blocks are arranged in even numbers.

[0011] With this kind of structural design, the forces acting on the tube during the tube tipping process are in pairs and act oppositely, which leads to better rolling effect.

[0012] Furthermore, a support frame is provided in the box body, the outer spindle is rotatably connected to the support frame, a ball bearing and a limit ring are provided on the inner side of the support frame, and the support frame cooperates with the outer spindle.

[0013] With this structural design, the variable frequency motor can drive the outer spindle to rotate more easily, with less friction resistance and greater stability.

[0014] Furthermore, a ball bearing is provided in the outer main shaft, and the inner main shaft is rotatably connected to the outer main shaft via the ball bearing.

[0015] Such a structural design can reduce the friction resistance between the outer spindle and the inner spindle through the ball bearing.

[0016] Furthermore, the braking mechanism includes a baffle fixedly connected to the box body and a brake installed on the baffle, and the brake can abut against and fix the second driven pulley.

[0017] Such a structural design can fix the second driven pulley through the brake, and then fix the inner main shaft, thereby preventing the inner main shaft from rotating during the tube rolling process and affecting the rolling effect.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention provides a rolling tube forming machine, which is provided with a box body, an outer spindle, a roller, an inner spindle, an extrusion block, a spring, a frequency conversion motor, a second servo motor, a reducer, a synchronous belt and a pulley. Through the improvement of the mechanical structure and electrical control, the pressing of the workpiece and the rotation can be carried out in steps. When the rolling tube forming machine of the present invention is extruding the workpiece and the extrusion block is not separated from the workpiece, the extrusion block will not rotate and will not rotate relative to the workpiece. The extrusion block and the workpiece are purely extruded, which can effectively prevent the workpiece from being twisted and broken, and the rolling effect is better and more stable.

[0020] 2. The present invention provides a rolled tube forming machine, which is provided with an L-shaped base, a first servo motor, a linear guide rail, a drive plate, a ball screw and a chuck, which can clamp and fix the tube workpiece, and can flexibly adjust the phase position between the pre-rolled end of the tube and the extrusion block according to needs, so that it is more convenient to use and has higher precision.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front cross-sectional view of a rolled tube forming machine of the present invention;

[0023] Figure 2 It is a front cross-sectional view of an outer spindle of a rolling tube forming machine of the present invention;

[0024] Figure 3 It is a side sectional view of a rolled tube forming machine of the present invention;

[0025] The reference numerals in the figure are as follows: base 1, first servo motor 2, linear guide 3, box 4, chuck 5, outer spindle 6, roller 7, first driven pulley 8, inner spindle 9, extrusion block 10, spring 11, second driven pulley 12, frequency conversion motor 13, second servo motor 14, reducer 15, first drive pulley 16, first synchronous belt 17, second drive pulley 18, second synchronous belt 19, drive plate 20, ball screw 21, support frame 22, encoder 23, pipe material 24. DETAILED DESCRIPTION

[0026] In order to make the technical solutions, advantages and purposes of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of this application.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a rolling tube forming machine, including a base 1, the base 1 is L-shaped, a first servo motor 2 and two parallel linear guides 3 are installed on the horizontal section of the base 1, a box 4 slidably connected to the two linear guides 3 is provided above the base 1, and a transmission mechanism is provided at the lower end of the box 4, and the transmission mechanism can convert the rotation force of the first servo motor 2 into a force to drive the box 4 to move horizontally along the linear guides 3. The transmission mechanism includes a driving plate 20 fixedly connected to the box 4 and a ball screw 21 penetrating the driving plate 20, the ball screw 21 is threadedly connected to the driving plate 20, the left end of the ball screw 21 is fixedly connected to the output end of the first servo motor 2, and the right end of the ball screw 21 is rotatably connected to the base 1.

[0028] A chuck 5 for clamping the pipe material 24 is installed on the upper part of the vertical section on the right side of the base 1, and a through hole is opened on the right side of the box body 4 at a position opposite to the chuck 5. An outer spindle 6 is arranged inside the box body 4, and two support frames 22 are installed at the bottom of the inner cavity of the box body 4. The outer spindle 6 is rotatably connected with the two support frames 22, and the outer spindle 6 is opposite to the chuck 5. A ball bearing and a limit ring are arranged inside the support frame 22, and the support frame 22 cooperates with the outer spindle 6. The circumferential side of the right end of the outer spindle 6 is rotatably connected to two symmetrically arranged rollers 7, the left end of the outer spindle 6 is fixedly connected to a first driven pulley 8, an inner spindle 9 is arranged inside the outer spindle 6, the inner spindle 9 is rotatably connected to the outer spindle 6 through a ball bearing, and two symmetrically arranged limit grooves are provided on the circumferential side of the right end of the inner spindle 9, and extrusion blocks 10 pointing to the center of the circle are slidably connected in the limit grooves, the opposite end of the extrusion block 10 is tilted to the left, and the end of the extrusion block 10 away from the axis of the outer spindle 6 is arranged in an arc shape, so that the contact between the roller 7 and the extrusion block 10 is smoother. A spring 11 is also provided in the limit groove, and the spring 11 can make the extrusion block 10 moving toward the center of the circle rebound and reset. The far left end of the inner spindle 9 penetrates the outer spindle 6 and is fixedly connected to the second driven pulley 12. The box body 4 is installed with a variable frequency motor 13 and a second servo motor 14. The output end of the variable frequency motor 13 is installed with a reducer 15. The output end of the reducer 15 is fixedly connected with a first driving pulley 16. The first driving pulley 16 is connected to the first driven pulley 8 through a first synchronous belt 17. The output end of the second servo motor 14 is fixedly connected with a second driving pulley 18. The second driving pulley 18 is connected to the second driven pulley 12 through a second synchronous belt 19. A brake mechanism and an encoder 23 are also provided in the box body 4. The brake mechanism can fix the inner spindle 9. The brake mechanism includes a baffle fixedly connected to the box body 4 and a brake installed on the baffle. The brake can contact and fix the second driven pulley 12.

[0029] When the tube material 24 needs to be rolled and pointed, the tube material 24 is first fixed with the chuck 5 so that the pre-rolled end of the tube material 24 is facing the inner spindle 9, and then the first servo motor 2 is started. The first servo motor 2 drives the ball screw 21 to rotate, thereby driving the box 4 to move toward the tube material 24 along the linear guide 3, so that the extrusion block 10 can roll the tube material 24. After that, the brake is started to contact and fix the second driven pulley 12, so as to fix the inner spindle 9. After the inner spindle 9 is fixed, the variable frequency motor 13 is started. Under the transmission action of the first driving pulley 16, the first synchronous belt 17 and the first driven pulley 8, the variable frequency motor 13 drives the outer spindle 6 to rotate, and the roller 7 rotates synchronously with the outer spindle 6. During the rotation process, the roller 7 squeezes the extrusion block 10 to move toward the tube material 24, so that the extrusion block 10 compresses the spring 11 and rolls the tube material 24. After the roller 7 and the extrusion block 10 are completely misaligned, the extrusion block 10 will be restored under the action of the spring 11. The inner main shaft 9 rebounds, and then the frequency conversion motor 13 is turned off, and the brake mechanism fixes the inner main shaft 9, and then the second servo motor 14 is started. Under the transmission action of the second driving pulley 18, the second synchronous belt 19 and the second driven pulley 12, the second servo motor 14 drives the inner main shaft 9 to rotate. When the inner main shaft 9 rotates to a preset rotation degree, the second servo motor 14 is turned off so that the extrusion block 10 rolls the tube material 24 from other angles, and then the inner main shaft 9 is fixed, and the extrusion block 10 rolls, and the rolling angle is changed, and the cycle is repeated. The corresponding operations are the same as above until the tube material 24 and the rolling end are completely rolled. The above rolling is preliminary rolling. After the preliminary rolling is completed, the extrusion block 10 is first placed in a free state without extrusion, and then according to the requirements of the twist tip length, the box body 4 is driven to move further toward the tube material 24, and then the second rolling is performed. After the second rolling, the tube material 24 with the target twist tip length is obtained.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the protection scope of the present invention.

Claims

1. A rolled tube forming machine, comprising a base (1), characterized in that: The base (1) is arranged in an L-shape. A first servo motor (2) and two parallel linear guide rails (3) are arranged on the horizontal section of the base (1). A box (4) slidably connected to the two linear guide rails (3) is arranged above the base (1). A transmission mechanism is arranged at the lower end of the box (4). The transmission mechanism can convert the rotation force of the first servo motor (2) into a force driving the box (4) to move horizontally along the linear guide rails (3). A clamp (5) for clamping a pipe material is arranged on the vertical section of the base (1). The box body (4) is provided with a through hole at a position corresponding to the chuck (5); an outer spindle (6) is rotatably connected inside the box body (4); a plurality of rollers (7) are rotatably connected to the circumferential side of the outer spindle (6) close to one end of the chuck (5); a first driven pulley (8) is provided at one end of the outer spindle (6) away from the chuck (5); an inner spindle (9) is rotatably connected inside the outer spindle (6); a limiting groove is provided on the circumferential side of the inner spindle (9) close to one end of the chuck (5); and a plurality of rollers (7) are slidably connected to the inner spindle (6). An extrusion block (10) pointing to the center of the circle, a spring (11) is also provided in the limit groove, and the spring (11) can make the extrusion block (10) moving toward the center of the circle rebound and reset, the end of the inner spindle (9) away from the chuck (5) passes through the outer spindle (6) and is provided with a second driven pulley (12), the box body (4) is also provided with a variable frequency motor (13) and a second servo motor (14), the output end of the variable frequency motor (13) is installed with a reducer (15), and the output end of the reducer (15) is provided with a first A driving pulley (16), wherein the first driving pulley (16) is connected to the first driven pulley (8) through a first synchronous belt (17), a second driving pulley (18) is provided at the output end of the second servo motor (14), and the second driving pulley (18) is connected to the second driven pulley (12) through a second synchronous belt (19), a braking mechanism is also provided in the housing (4), and the braking mechanism can fix the inner main shaft (9), and an encoder (23) is also provided in the housing (4).

2. A rolled tube forming machine according to claim 1, characterized in that: The transmission mechanism comprises a drive plate (20) fixedly connected to the box body (4) and a ball screw (21) penetrating the drive plate (20); the ball screw (21) is threadedly connected to the drive plate (20); one end of the ball screw (21) is fixedly connected to the output end of the first servo motor (2); and the other end of the ball screw (21) is rotatably connected to the base (1).

3. A rolled tube forming machine according to claim 1, characterized in that: The rollers (7) and the extrusion blocks (10) are both distributed in a circumference.

4. A rolled tube forming machine according to claim 3, characterized in that: The rollers (7) and the extrusion blocks (10) are both arranged in even numbers.

5. A rolled tube forming machine according to claim 1, characterized in that: A support frame (22) is provided inside the box body (4), the outer main shaft (6) is rotatably connected to the support frame (22), a ball bearing and a limit ring are provided inside the support frame (22), and the support frame (22) is matched with the outer main shaft (6).

6. A rolled tube forming machine according to claim 1, characterized in that: A ball bearing is arranged inside the outer main shaft (6), and the inner main shaft (9) is rotatably connected to the outer main shaft (6) via the ball bearing.

7. A rolled tube forming machine according to claim 1, characterized in that: The brake mechanism comprises a baffle fixedly connected to the box body (4) and a brake mounted on the baffle, and the brake can abut against and fix the second driven pulley (12).

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