CN110369570B - Bending equipment and bending process of precise arc tube - Google Patents
Bending equipment and bending process of precise arc tube Download PDFInfo
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- CN110369570B CN110369570B CN201910741971.4A CN201910741971A CN110369570B CN 110369570 B CN110369570 B CN 110369570B CN 201910741971 A CN201910741971 A CN 201910741971A CN 110369570 B CN110369570 B CN 110369570B
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- arc
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- pipe body
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- steering engine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
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Abstract
The invention discloses a bending device for a precise arc pipe, which comprises a horizontal device platform, wherein a central steering engine is fixedly arranged on the device platform; the side part of the shell of the central steering engine is fixedly connected with a sector-shaped pipe body bending seat, and the sector-shaped circle center of the sector-shaped pipe body bending seat and the steering engine output shaft of the central steering engine are coaxially arranged; the pipe bending machine is simple in structure, the outer surface and the inner surface of the bent pipe can be shaped in time after the straight pipe is bent, and the roundness of the bent pipe and the flatness of the pipe wall are improved; the hard guide ball has the function of shaping and flattening the inner wall of the arc pipe in the process of slowly displacing along the anticlockwise direction of the arc passage in the pipe of the arc pipe; the pipe body restriction hole plays a role in shaping and flattening the outer wall of the arc pipe in the process of clockwise displacement of the pipe body bending guide groove to the clockwise end of the pipe body bending guide groove.
Description
Technical Field
The invention belongs to the field of pipe bending process.
Background
After the arc-shaped pipe is bent, due to certain deformation, the outer surface and the inner surface of the pipe body can have partial local concave and convex unevenness and low roundness, so that the precision and the quality of the bent pipe body are influenced; there is therefore a need for a mechanism to correct the shaping in time during the bending process.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides bending equipment of a precise circular arc pipe capable of being shaped in time and a bending process thereof.
The technical scheme is as follows: in order to achieve the purpose, the bending equipment for the precise arc pipe comprises a horizontal equipment platform, wherein a central steering engine is fixedly arranged on the equipment platform; the side part of the shell of the central steering engine is fixedly connected with a sector-shaped pipe body bending seat, and the sector-shaped circle center of the sector-shaped pipe body bending seat and the steering engine output shaft of the central steering engine are coaxially arranged; a pipe body bending guide groove is formed in the arc surface of the outer end of the fan-shaped pipe body bending seat, the pipe body bending guide groove extends along the bending radian of the arc surface of the outer end of the pipe body bending seat, the cross section profile of the pipe body bending guide groove is semicircular, and arc rolling edges are arranged on two sides of the pipe body bending guide groove; the pipe body rolling device is characterized by further comprising a columnar pipe body rolling wheel, wherein a rolling groove is formed in the middle height of the periphery of the pipe body rolling wheel, two sides of the rolling groove are both annular rolling surfaces, and the cross section of the rolling groove is semicircular; the two annular rolling surfaces are respectively in rolling connection with the two arc-shaped rolling edges; a circular pipe body constraint hole is formed at the intersection position of the rolling groove and the pipe body bending guide groove; the tube body rolling wheel is coaxially and rotatably provided with a rolling wheel shaft and further comprises a power arm, and two ends of the power arm are respectively and fixedly connected with the steering engine output shaft and the rolling wheel shaft; the central steering engine drives an annular rolling surface on the pipe body rolling wheel to roll along the arc-shaped rolling edge through the power arm.
Further, an arc-shaped rack guide rail is arranged on one side, away from the pipe body bending seat, of the shell of the central steering engine, and the arc-shaped circle center of the arc-shaped rack guide rail and the steering engine output shaft of the central steering engine are coaxially arranged; the arc-shaped rack guide rail is fixedly connected with the shell of the central steering engine through a plurality of guide rail supports; an arc guide groove is formed in the outer arc surface of the arc rack guide rail in an extending mode along the direction of the arc rack guide rail; an arc-shaped rack is arranged in the arc-shaped guide groove in a sliding mode, a plurality of tooth bodies are arranged on the outer arc surface of the arc-shaped rack in an array mode along the arc direction, and the inner arc surface of the arc-shaped rack is connected with the arc-shaped guide groove in a sliding mode; the equipment platform is provided with a linear guide rail, the linear guide rail is provided with a linear guide rail groove, the equipment platform further comprises a horizontal linear rack, the lower end of the linear rack is arranged in the linear guide rail groove in a sliding mode, and the linear rack can slide along the length direction of the linear guide rail groove; the tooth body array on the linear rack is meshed with the tooth body on the outer arc surface of the arc rack; the linear motion of the linear rack can drive the arc rack to rotate along the axis of the steering engine output shaft of the central steering engine; one end of the arc-shaped rack in the anticlockwise direction along the axis is integrally provided with a hard guide ball body; the sphere center of the hard guide sphere is positioned on the arc center line of the arc pipe in the pipe body bending guide groove, and the diameter of the hard guide sphere is the same as the inner diameter of the arc pipe in the pipe body bending guide groove; the device comprises a device platform, and is characterized in that a horizontal hydraulic push rod device is installed on the device platform, the hydraulic push rod extension line of the hydraulic push rod device is collinear with the length extension line of the linear rack, and the tail end of a hydraulic push rod of the hydraulic push rod device is fixedly connected with the end part of the linear rack.
Furthermore, a retaining ring seat is fixedly arranged on the upper side of the clockwise end of the pipe body bending seat, an arc pipe retaining ring is arranged at the clockwise end of the pipe body bending guide groove, the inner diameter of the arc pipe retaining ring is larger than that of the arc pipe, and the inner diameter of the arc pipe retaining ring is smaller than the outer diameter of the arc pipe; the arc pipe baffle ring is fixedly connected with the pipe body bending seat through a fixing column;
the equipment platform is also provided with a vertical gear shaft, a first gear is rotatably arranged on the gear shaft through a bearing, and the first gear is meshed with the gear body on the arc-shaped rack; the equipment platform is also provided with a vertical power-assisted motor; the output shaft of the power-assisted motor is connected with a second gear, and the second gear is also meshed with the gear body on the arc-shaped rack;
the device platform is also fixedly provided with a second hydraulic push rod device, the second hydraulic push rod device is positioned on one side of the pipe body bending seat in the anticlockwise direction, the tail end of a second hydraulic push rod of the second hydraulic push rod device is fixedly connected with a limiting block, a hard hemisphere is fixedly connected onto the limiting block, the hard hemisphere and the second hydraulic push rod device are coaxially arranged, and the diameter of the hard hemisphere is the same as that of the hard guide sphere;
further, the bending process of the bending equipment for the precise circular arc tube comprises the following steps:
in an initial state, a hard guide ball is positioned at a clockwise end of a bending guide groove of a pipe body, a pipe body rolling wheel rolls to a counterclockwise end of a pipe body bending seat along an arc-shaped rolling edge, and the position of the pipe body rolling wheel is maintained through a power arm; then controlling a second hydraulic push rod device to enable the hard hemispheroid to gradually keep away from the pipe body constraint hole until the distance between the hard hemispheroid and the pipe body constraint hole is larger than that of the straight pipe to be bent, coaxially sleeving one end of the straight pipe to be bent on the hard hemispheroid, and then controlling the second hydraulic push rod device to enable the hard hemispheroid to gradually approach the pipe body constraint hole until the other end of the straight pipe to be bent is just coaxially inserted into the pipe body constraint hole; the process of tooling the straight pipe to be bent is completed at the moment;
controlling a hydraulic push rod device to enable a linear rack to drive an arc-shaped rack to rotate anticlockwise along a steering engine output shaft of the central steering engine until the hard guide ball body moves to the counterclockwise end of the pipe body bending guide groove in a counterclockwise direction; at the moment, the hard guide ball body is just sleeved into the pipe orifice of one end of the straight pipe to be bent, which is far away from the hard hemispheroid;
controlling a second hydraulic push rod device to enable a limiting block to slowly push a straight pipe to be bent along the axis, so that one end, far away from the hard hemispheroid, of the straight pipe to be bent gradually penetrates through the pipe body constraint hole, and simultaneously controlling the hydraulic push rod device to enable a linear rack to drive an arc-shaped rack to slowly rotate clockwise along the steering engine output shaft of the central steering engine, so that the hard guide ball slowly displaces clockwise along the pipe body bending guide groove, and the hard guide ball is always in a pipe orifice of one end, far away from the hard hemispheroid, of the straight pipe to be bent; the straight pipe to be bent which gradually passes through the pipe body bending guide groove is clockwise bent into a bent pipe section under the clockwise guide of the hard guide ball body, the straight pipe to be bent is continuously and slowly pushed along the axis along the limiting block, the bent pipe section is further slowly fed along the clockwise direction of the pipe body bending guide groove until the straight pipe to be bent is pushed by the limiting block to completely pass through the pipe body bending guide groove, at the moment, the hard hemispheroid is just positioned at the counterclockwise end of the pipe body bending guide groove, and the hard guide ball body is just positioned at the clockwise end of the pipe body bending guide groove; at the moment, the straight pipe to be bent is preliminarily bent into a complete circular arc pipe; in the guiding and bending process of the hard guiding sphere in the step, although a complete circular arc tube is integrally formed, the outer wall and the inner wall of the circular arc tube at the moment have partial local depression, protruded unevenness and low roundness;
step four, starting the central steering engine at the moment, and driving the pipe body rolling wheel to roll clockwise along the arc-shaped rolling edge by the central steering engine through the power arm until the pipe body rolling wheel rolls to the counterclockwise end of the pipe body bending seat, wherein in the process, due to the position change of the pipe body rolling wheel, the pipe body constraint hole is displaced clockwise along the pipe body bending guide groove to the clockwise end of the pipe body bending guide groove; the pipe body restriction hole is a rigid hole which is sleeved on the arc pipe all the time, so that the pipe body restriction hole plays a role in shaping and flattening the outer wall of the arc pipe in the process of clockwise moving to the clockwise end of the pipe body bending guide groove along the pipe body bending guide groove; then the steering engine of the control center drives the original path of the pipe body rolling wheel to return to the state of the end of the step three through the power arm;
step five, controlling a hydraulic push rod device to enable a linear rack to drive an arc rack to slowly rotate anticlockwise along a steering engine output shaft of the central steering engine, further enabling a hard guide ball to slowly displace along the anticlockwise direction of an in-pipe arc channel of the arc pipe, further enabling the hard guide ball to walk through the in-pipe arc channel of the whole arc pipe, then controlling the hard guide ball to return to the original path again, and recovering to the state when the step four is finished, wherein the hard guide ball has a shaping and leveling effect on the inner wall of the arc pipe in the process of slowly displacing along the anticlockwise direction of the in-pipe arc channel of the arc pipe;
step six, controlling the second hydraulic push rod device to retract, and separating the hard hemispheroid from the counterclockwise end of the circular arc tube to enable the circular arc tube to be released from the positioned state; and then the flattened circular arc pipe is disassembled.
Has the advantages that: the pipe bending machine is simple in structure, the outer surface and the inner surface of the bent pipe can be shaped in time after the straight pipe is bent, and the roundness of the bent pipe and the flatness of the pipe wall are improved; the hard guide ball has the function of shaping and flattening the inner wall of the arc pipe in the process of slowly displacing along the anticlockwise direction of the arc passage in the pipe of the arc pipe; the pipe body restriction hole plays a role in shaping and flattening the outer wall of the arc pipe in the process of clockwise displacement of the pipe body bending guide groove to the clockwise end of the pipe body bending guide groove.
Drawings
FIG. 1 is a top view of the whole apparatus after a straight pipe to be bent is bent into an arc pipe;
FIG. 2 is a side view of the apparatus without a workpiece mounted thereon;
FIG. 3 is a schematic diagram of the transmission portion of the apparatus;
FIG. 4 is a schematic view of the disassembly of an arc-shaped rack;
FIG. 5 is a schematic view of an arc-shaped rack structure;
FIG. 6 is a schematic view of the apparatus in an initial state of a step of the bending process;
FIG. 7 is a schematic view of the apparatus at the end of step two of the bending process;
FIG. 8 is a schematic view of the apparatus during step three of the bending process;
FIG. 9 is a top view of the apparatus at the end of step three of the bending process;
FIG. 10 is a cut-away top view of the apparatus at the conclusion of step three of the bending process;
FIG. 11 is a schematic perspective view of the apparatus at the end of step three of the bending process;
FIG. 12 is a schematic view of the apparatus during step four of the bending process;
FIG. 13 is a schematic illustration of the apparatus during step four of the bending process.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The bending equipment for the precise circular arc pipe shown in the attached drawings 1 to 13 comprises a horizontal equipment platform 7, wherein a central steering engine 6 is fixedly arranged on the equipment platform 7; a fan-shaped pipe body bending seat 23 is fixedly connected to the side part of the shell of the central steering engine 6, and the fan-shaped circle center of the fan-shaped pipe body bending seat 23 and a steering engine output shaft 25 of the central steering engine 6 are coaxially arranged; a pipe bending guide groove 27 is formed in the arc surface of the outer end of the fan-shaped pipe bending seat 23, the pipe bending guide groove 27 extends along the bending radian of the arc surface of the outer end of the pipe bending seat 23, the cross-sectional profile of the pipe bending guide groove 27 is semicircular, and arc rolling edges 28 are arranged on two sides of the pipe bending guide groove 27; the pipe body rolling device is characterized by further comprising a columnar pipe body rolling wheel 5, wherein a rolling groove 30 is formed in the middle height of the periphery of the pipe body rolling wheel 5, two sides of the rolling groove 30 are both annular rolling surfaces 29, and the cross section of the rolling groove 30 is semicircular; the two annular rolling surfaces 29 are respectively in rolling connection with the two arc-shaped rolling edges 28; a round pipe body restriction hole 35 is formed at the intersection position of the rolling groove 30 and the pipe body bending guide groove 27; the pipe body rolling wheel 5 is coaxially and rotatably provided with a rolling wheel shaft 31 and further comprises a power arm 4, and two ends of the power arm 4 are respectively and fixedly connected with the steering engine output shaft 25 and the rolling wheel shaft 31; the central steering engine 6 drives the annular rolling surface 29 on the pipe body rolling wheel 5 to roll along the arc-shaped rolling edge 28 through the power arm 4.
An arc-shaped rack guide rail 11 is arranged on one side, away from the pipe body bending seat 23, of the shell of the central steering engine 6, and the arc-shaped circle center of the arc-shaped rack guide rail 11 and a steering engine output shaft 25 of the central steering engine 6 are coaxially arranged; the arc-shaped rack guide rail 11 is fixedly connected with the shell of the central steering engine 6 through a plurality of guide rail supports 10; an arc guide groove 26 is formed in the outer arc surface of the arc rack guide rail 11 in an extending mode along the direction of the arc rack guide rail; an arc-shaped rack 8 is slidably arranged in the arc-shaped guide groove 26, a plurality of tooth bodies 9 are arranged on the outer arc surface of the arc-shaped rack 8 in an array manner along the arc direction, and the inner arc surface of the arc-shaped rack 8 is slidably connected with the arc-shaped guide groove 26; the equipment platform 7 is provided with a linear guide rail 15, the linear guide rail 15 is provided with a linear guide rail groove 18, the equipment platform further comprises a horizontal linear rack 14, the lower end of the linear rack 14 is slidably arranged in the linear guide rail groove 18, and the linear rack 14 can slide along the length direction of the linear guide rail groove 18; the tooth array 37 on the linear rack 14 is meshed with the tooth 9 on the extrados surface of the arc rack 8; the linear motion energy of the linear rack 14 can drive the arc-shaped rack 8 to rotate along the axis of the steering engine output shaft 25 of the central steering engine 6; one end of the arc-shaped rack 8 in the anticlockwise direction of the axis is integrally provided with a hard guide ball 24; the center of the hard guide sphere 24 is located on the arc center line of the arc tube 22 in the tube bending guide groove 27, and the diameter of the hard guide sphere 24 is the same as the inner diameter of the arc tube 22 in the tube bending guide groove 27; a horizontal hydraulic push rod device 17 is installed on the equipment platform 7, the extension line of a hydraulic push rod 16 of the hydraulic push rod device 17 is collinear with the length extension line of the linear rack 14, and the tail end of the hydraulic push rod 16 of the hydraulic push rod device 17 is fixedly connected with the end part of the linear rack 14.
A stop ring seat 33 is fixedly arranged on the upper side of the clockwise end of the pipe body bending seat 23, an arc pipe stop ring 32 is arranged on the clockwise end of the pipe body bending guide groove 27, the inner diameter of the arc pipe stop ring 32 is larger than that of the arc pipe 22, and the inner diameter of the arc pipe stop ring 32 is smaller than the outer diameter of the arc pipe 22; the arc tube baffle ring 32 is fixedly connected with the tube body bending seat 23 through a fixing column 34;
a vertical gear shaft 41 is further mounted on the equipment platform 7, a first gear 13 is rotatably mounted on the gear shaft 41 through a bearing, and the first gear 13 is meshed with the gear body 9 on the arc-shaped rack 8; a vertical power-assisted motor 40 is further mounted on the equipment platform 7; the output shaft of the power-assisted motor 40 is connected with a second gear 12, and the second gear 12 is also meshed with the gear body 9 on the arc-shaped rack 8;
the device platform 7 is further fixedly provided with a second hydraulic push rod device 1, the second hydraulic push rod device 1 is located on one side of the pipe body bending seat 23 in the anticlockwise direction, the tail end of a second hydraulic push rod 2 of the second hydraulic push rod device 1 is fixedly connected with a limiting block 20, a hard hemisphere 21 is fixedly connected to the limiting block 20, the hard hemisphere 21 and the second hydraulic push rod device 1 are coaxially arranged, and the diameter of the hard hemisphere 21 is the same as that of the hard guide sphere 24;
the process for bending the precise circular arc tube by using the device comprises the following steps:
in the initial state, the hard guide ball 24 is positioned at the clockwise end of the pipe bending guide groove 27, the pipe rolling wheel 5 rolls to the counterclockwise end of the pipe bending seat 23 along the arc-shaped rolling edge 28, and the position of the pipe rolling wheel 5 is maintained through the power arm 4; then controlling a second hydraulic push rod device 1 to enable the hard hemispheroid 21 to gradually get away from the pipe body constraint hole 35 until the distance between the hard hemispheroid 21 and the pipe body constraint hole 35 is larger than that of the straight pipe 22.1 to be bent, coaxially sleeving one end of the straight pipe 22.1 to be bent on the hard hemispheroid 21, then controlling the second hydraulic push rod device 1 to enable the hard hemispheroid 21 to gradually get close to the pipe body constraint hole 35 until the other end of the straight pipe 22.1 to be bent is just coaxially inserted into the pipe body constraint hole 35; the process of tooling the straight pipe 22.1 to be bent is completed at this time;
step two, controlling a hydraulic push rod device 17 to enable a linear rack 14 to drive the arc-shaped rack 8 to rotate anticlockwise along a steering engine output shaft 25 of the central steering engine 6 until the hard guide ball 24 moves to the counterclockwise end of the pipe body bending guide groove 27 in a counterclockwise manner; at the moment, the hard guide ball 24 is just sleeved into the pipe orifice at one end of the straight pipe 22.1 to be bent, which is far away from the hard hemispheroid 21;
step three, controlling a second hydraulic push rod device 1 to enable a limiting block 20 to slowly push a to-be-bent straight pipe 22.1 along an axis, and further enabling one end, far away from the hard hemispheroid 21, of the to-be-bent straight pipe 22.1 to gradually penetrate through a pipe body restriction hole 35, and meanwhile controlling a hydraulic push rod device 17 to enable a straight rack 14 to drive an arc rack 8 to slowly rotate clockwise along a steering engine output shaft 25 of the central steering engine 6, so that a hard guide ball 24 slowly displaces clockwise along a pipe body bending guide groove 27, and the hard guide ball 24 is always in a pipe orifice of one end, far away from the hard hemispheroid 21, of the to-be-bent straight pipe 22.1; the straight pipe 22.1 to be bent gradually passing through the pipe body restriction hole 35 is clockwise bent into a bent pipe section 22.2 under the clockwise guidance of the hard guidance ball 24, the straight pipe 22.1 to be bent is continuously and slowly pushed along the axis along with the limiting block 20, and then the bent pipe section 22.2 is slowly fed along the clockwise direction of the pipe body bending guidance groove 27 until the straight pipe 22.1 to be bent is pushed by the limiting block to completely pass through the pipe body restriction hole 35, at the moment, the hard hemispheroid 21 is just positioned at the counterclockwise end of the pipe body bending guidance groove 27, and the hard guidance ball 24 is just positioned at the clockwise end of the pipe body bending guidance groove 27; at the moment, the straight pipe 22.1 to be bent is preliminarily bent into a complete circular arc pipe 22; although a complete arc tube is integrally formed in the guiding and bending process of the hard guiding sphere 24 in the step, the outer wall and the inner wall of the arc tube at the moment have partial local depression, protrusion, unevenness and low roundness;
step four, starting the central steering engine 6 at the moment, and then driving the pipe body rolling wheel 5 to roll clockwise along the arc-shaped rolling edge 28 by the central steering engine 6 through the power arm 4 until the pipe body rolling wheel 5 rolls to the counterclockwise end of the pipe body bending seat 23, wherein in the process, due to the position change of the pipe body rolling wheel 5, the pipe body constraint hole 35 is shifted clockwise along the pipe body bending guide groove 27 to the clockwise end of the pipe body bending guide groove 27; the pipe body restriction hole 35 is a rigid hole which is always sleeved on the circular arc pipe 22, so that the pipe body restriction hole 35 plays a role in shaping and flattening the outer wall of the circular arc pipe 22 in the process of clockwise displacement along the pipe body bending guide groove 27 to the clockwise end of the pipe body bending guide groove 27; then the steering engine 6 of the control center drives the tube body rolling wheel 5 to return to the state of the end of the step three through the power arm 4;
step five, controlling the hydraulic push rod device 17 to enable the linear rack 14 to drive the arc rack 8 to slowly rotate anticlockwise along the steering engine output shaft 25 of the central steering engine 6, further enabling the hard guide ball 24 to slowly displace anticlockwise along the in-pipe arc channel 43 of the arc pipe 22, further enabling the hard guide ball 24 to finish the in-pipe arc channel 43 of the whole arc pipe 22, then controlling the hard guide ball 24 to return to the original path again, and recovering to the state when the step four is finished, wherein the hard guide ball 24 plays a role in shaping and leveling the inner wall of the arc pipe 22 in the process of slowly displacing anticlockwise along the in-pipe arc channel 43 of the arc pipe 22;
step six, controlling the second hydraulic push rod device 1 to retract, and separating the hard hemispheroid 21 from the counterclockwise end of the circular arc tube 22 to enable the circular arc tube 22 to be released from the positioned state; the flattened circular arc tube 22 is then removed.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (3)
1. Equipment of buckling of accurate circular arc pipe, its characterized in that: the device comprises a horizontal device platform (7), wherein a central steering engine (6) is fixedly arranged on the device platform (7); a fan-shaped pipe body bending seat (23) is fixedly connected to the side part of the shell of the central steering engine (6), and the fan-shaped circle center of the fan-shaped pipe body bending seat (23) and a steering engine output shaft (25) of the central steering engine (6) are coaxially arranged; a pipe body bending guide groove (27) is formed in the arc surface of the outer end of the fan-shaped pipe body bending seat (23), the pipe body bending guide groove (27) extends along the bending radian of the arc surface of the outer end of the pipe body bending seat (23), the cross section profile of the pipe body bending guide groove (27) is semicircular, and arc rolling edges (28) are arranged on two sides of the pipe body bending guide groove (27); the pipe body rolling device is characterized by further comprising a columnar pipe body rolling wheel (5), wherein a rolling groove (30) is formed in the middle height of the periphery of the pipe body rolling wheel (5), two sides of the rolling groove (30) are both annular rolling surfaces (29), and the cross section of the rolling groove (30) is semicircular; the two annular rolling surfaces (29) are respectively in rolling connection with the two arc-shaped rolling edges (28); a round pipe body restriction hole (35) is formed at the intersection position of the rolling groove (30) and the pipe body bending guide groove (27); the pipe body rolling wheel (5) is coaxially and rotatably provided with a rolling wheel shaft (31) and further comprises a power arm (4), and two ends of the power arm (4) are respectively and fixedly connected with the steering engine output shaft (25) and the rolling wheel shaft (31); the central steering engine (6) drives an annular rolling surface (29) on the pipe body rolling wheel (5) to roll along an arc-shaped rolling edge (28) through the power arm (4);
an arc-shaped rack guide rail (11) is arranged on one side, away from the pipe body bending seat (23), of the shell of the central steering engine (6), and the arc-shaped circle center of the arc-shaped rack guide rail (11) and a steering engine output shaft (25) of the central steering engine (6) are coaxially arranged; the arc-shaped rack guide rail (11) is fixedly connected with the shell of the central steering engine (6) through a plurality of guide rail supports (10); an arc-shaped guide groove (26) is formed in the outer arc surface of the arc-shaped rack guide rail (11) in an extending mode along the direction of the arc-shaped rack guide rail; an arc-shaped rack (8) is arranged in the arc-shaped guide groove (26) in a sliding mode, a plurality of tooth bodies (9) are arranged on the outer arc surface of the arc-shaped rack (8) in an array mode along the arc direction, and the inner arc surface of the arc-shaped rack (8) is connected with the arc-shaped guide groove (26) in a sliding mode; the equipment platform (7) is provided with a linear guide rail (15), a linear guide rail groove (18) is formed in the linear guide rail (15), the equipment platform further comprises a horizontal linear rack (14), the lower end of the linear rack (14) is arranged in the linear guide rail groove (18) in a sliding mode, and the linear rack (14) can slide along the length direction of the linear guide rail groove (18); a tooth body array (37) on the linear rack (14) is meshed with a tooth body (9) on the outer arc surface of the arc rack (8); the linear motion of the linear rack (14) can drive the arc-shaped rack (8) to rotate along the axis of the steering engine output shaft (25) of the central steering engine (6); one end of the arc-shaped rack (8) in the anticlockwise direction along the axis is integrally provided with a hard guide ball body (24); the center of the hard guide sphere (24) is positioned on the arc center line of the arc pipe (22) in the pipe body bending guide groove (27), and the diameter of the hard guide sphere (24) is the same as the inner diameter of the arc pipe (22) in the pipe body bending guide groove (27); the device is characterized in that a horizontal hydraulic push rod device (17) is installed on the device platform (7), the extension line of a hydraulic push rod (16) of the hydraulic push rod device (17) is collinear with the extension line of the length of the linear rack (14), and the tail end of the hydraulic push rod (16) of the hydraulic push rod device (17) is fixedly connected with the end part of the linear rack (14).
2. The bending device of the precise circular arc tube according to claim 1, wherein: a retaining ring seat (33) is fixedly arranged on the upper side of the clockwise end of the pipe body bending seat (23), an arc pipe retaining ring (32) is arranged on the clockwise end of the pipe body bending guide groove (27), the inner diameter of the arc pipe retaining ring (32) is larger than that of the arc pipe (22), and the inner diameter of the arc pipe retaining ring (32) is smaller than that of the arc pipe (22); the arc pipe baffle ring (32) is fixedly connected with the pipe body bending seat (23) through a fixing column (34);
a vertical gear shaft (41) is further mounted on the equipment platform (7), a first gear (13) is rotatably mounted on the gear shaft (41) through a bearing, and the first gear (13) is meshed with a gear body (9) on the arc-shaped rack (8); a vertical power-assisted motor (40) is further mounted on the equipment platform (7); a second gear (12) is connected to an output shaft of the power-assisted motor (40), and the second gear (12) is also meshed with a gear body (9) on the arc-shaped rack (8);
still fixed mounting has second hydraulic pressure push rod device (1) on equipment platform (7), second hydraulic pressure push rod device (1) is located the body is buckled one side of the counter clockwise of seat (23), second hydraulic pressure push rod (2) terminal fixedly connected with stopper (20) of second hydraulic pressure push rod device (1), fixedly connected with stereoplasm hemisphere (21) is gone up in stopper (20), stereoplasm hemisphere (21) with second hydraulic pressure push rod device (1) sets up with the axle center, the diameter of stereoplasm hemisphere (21) with the diameter of stereoplasm guide spheroid (24) is the same.
3. The bending process of the bending equipment for the precise circular arc tube according to claim 2, which is characterized in that: the method comprises the following steps:
in an initial state, a hard guide ball (24) is positioned at a clockwise end of a pipe body bending guide groove (27), a pipe body rolling wheel (5) rolls to a counterclockwise end of a pipe body bending seat (23) along an arc-shaped rolling edge (28), and the position of the pipe body rolling wheel (5) is maintained through a power arm (4); then controlling a second hydraulic push rod device (1), enabling the hard hemispheroid (21) to be gradually far away from the pipe body constraint hole (35) until the distance between the hard hemispheroid (21) and the pipe body constraint hole (35) is larger than the length of the straight pipe (22.1) to be bent, then coaxially sleeving one end of the straight pipe (22.1) to be bent on the hard hemispheroid (21), then controlling the second hydraulic push rod device (1) to enable the hard hemispheroid (21) to be gradually close to the pipe body constraint hole (35) until the other end of the straight pipe (22.1) to be bent is just coaxially inserted into the pipe body constraint hole (35); the process of tooling the straight pipe (22.1) to be bent is completed at the moment;
controlling a hydraulic push rod device (17) to enable a linear rack (14) to drive an arc-shaped rack (8) to rotate anticlockwise along a steering engine output shaft (25) of the central steering engine (6) until a hard guide ball body (24) moves to the counterclockwise end of a pipe body bending guide groove (27) in a counterclockwise manner; at the moment, the hard guide ball body (24) is just sleeved into the pipe orifice at one end of the straight pipe (22.1) to be bent, which is far away from the hard hemispheroid (21);
thirdly, controlling a second hydraulic push rod device (1), enabling a limiting block (20) to slowly push a straight pipe (22.1) to be bent along an axis, enabling one end, far away from the hard hemispheroid (21), of the straight pipe (22.1) to be bent to gradually penetrate through a pipe body constraint hole (35), and meanwhile controlling a hydraulic push rod device (17), enabling a linear rack (14) to drive an arc-shaped rack (8) to slowly rotate clockwise along a steering engine output shaft (25) of a central steering engine (6), further enabling a hard guide ball (24) to slowly displace clockwise along a pipe body bending guide groove (27), and enabling the hard guide ball (24) to be always in a pipe orifice of one end, far away from the hard hemispheroid (21), of the straight pipe (22.1) to be bent; the straight pipe (22.1) to be bent gradually penetrating through the pipe body restriction hole (35) is clockwise bent into a bent pipe section (22.2) under the clockwise guidance of the hard guidance ball body (24), the straight pipe (22.1) to be bent is continuously and slowly pushed along the axis along with the limiting block (20), the bent pipe section (22.2) is slowly fed along the clockwise direction of the pipe body bending guidance groove (27) until the straight pipe (22.1) to be bent is pushed by the limiting block to completely penetrate through the pipe body restriction hole (35), the hard hemispheroid (21) is just positioned at the counterclockwise end of the pipe body bending guidance groove (27), and the hard guidance ball body (24) is just positioned at the clockwise end of the pipe body bending guidance groove (27); at the moment, the straight pipe (22.1) to be bent is preliminarily bent into a complete circular arc pipe (22);
fourthly, starting the central steering engine (6), and then driving the pipe body rolling wheel (5) to roll clockwise along the arc-shaped rolling edge (28) by the central steering engine (6) through the power arm (4) until the pipe body rolling wheel (5) rolls to the clockwise end of the pipe body bending seat (23), wherein in the process, due to the position change of the pipe body rolling wheel (5), the pipe body constraint hole (35) moves clockwise to the clockwise end of the pipe body bending guide groove (27) along the pipe body bending guide groove (27); the pipe body restriction hole (35) is a rigid hole which is sleeved on the circular arc pipe (22) all the time, so that the pipe body restriction hole (35) plays a role in shaping and flattening the outer wall of the circular arc pipe (22) in the process of clockwise moving along the pipe body bending guide groove (27) to the clockwise end of the pipe body bending guide groove (27); then the steering engine (6) of the control center drives the pipe body rolling wheel (5) to return to the state of the original path after the third step through the power arm (4);
fifthly, controlling a hydraulic push rod device (17), enabling a linear rack (14) to drive an arc rack (8) to slowly rotate anticlockwise along a steering engine output shaft (25) of the central steering engine (6), further enabling a hard guide sphere (24) to slowly displace anticlockwise along an in-pipe arc channel (43) of the arc pipe (22), further enabling the hard guide sphere (24) to walk through the in-pipe arc channel (43) of the whole arc pipe (22), then controlling the hard guide sphere (24) to return to the original path again, and recovering to the state after the fourth step, wherein the hard guide sphere (24) has a shaping and leveling effect on the inner wall of the arc pipe (22) in the process of slowly displacing anticlockwise along the in-pipe arc channel (43) of the arc pipe (22);
step six, the second hydraulic push rod device (1) is controlled to retract, the hard hemispheroid (21) is separated from the counterclockwise end of the circular arc tube (22), and the circular arc tube (22) is released from the positioned state; then the flattened circular arc tube (22) is disassembled.
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| CN111496032A (en) * | 2020-05-22 | 2020-08-07 | 杭涛 | Pipe bending forming equipment and bending process |
| CN111842574B (en) * | 2020-07-23 | 2022-04-22 | 临海市金源工艺品有限公司 | A equipment of buckling for producing rattan chair skeleton |
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| RU2353455C2 (en) * | 2006-01-16 | 2009-04-27 | ООО "НПФ "Инстан" | Tube bending device |
| WO2017210285A1 (en) * | 2016-05-31 | 2017-12-07 | Hubbell Incorporated | Helical bending device |
| TWI653107B (en) * | 2017-10-11 | 2019-03-11 | 鄭捷宇 | Bending tool |
| CN209109897U (en) * | 2018-10-23 | 2019-07-16 | 安徽杰航不锈钢装饰工程有限公司 | A kind of highly-safe stainless steel tube apparatus for bending |
| CN209206150U (en) * | 2018-11-22 | 2019-08-06 | 广州市机电安装有限公司 | A kind of New Type Bending Pipe Unit |
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