Involute flat bend device

Abstract

The application discloses a involute flat bending pipe device, and belongs to the technical field of bending pipe equipment, which comprises a bottom plate, the bottom plate is provided with a fixing assembly, a angle adjusting rotating plate is rotatably installed on the bottom plate, a propelling assembly and an auxiliary assembly are arranged on the angle adjusting rotating plate, the fixing assembly can conveniently replace and install an annular mounting seat provided with a required center mold according to requirements, and the bending pipe requirements of pipe column pieces with different specifications and sizes can be met, the propelling assembly can realize automatic conveying of the pipe piece, and the position closest to the fixing assembly of the pipe piece can be assisted and supported under the cooperation of the auxiliary assembly, so that the cleaning of the bending pipe is prevented from being bent before bending, the limiting of the positions of the strip-shaped slide plate and the pressing slide plate can be realized through the setting of a limiting unit, and the stability of the center mold is improved, and the bending requirements of the bending pipe of the involute flat disc pipe with different pipe diameters can be met through the cooperation of the fixing assembly, the propelling assembly and the auxiliary assembly and under the action of the pressing circular plate.

Description

Technical Field

[0001] This invention relates to the field of pipe bending equipment technology, and in particular to an involute flat pipe bending device. Background Technology

[0002] An involute flat pipe bending device is a device for bending involute flat pipes according to different pipe diameters. In the prior art, involute flat pipe bending is mainly achieved by setting different bending curvatures using three or more guide wheels. However, this method has significant limitations. It relies on the change of bending curvature to form the overall shape of the bend, resulting in the bend usually appearing as a cone shape rather than an ideal flat state. In order to achieve a flat state, it is often necessary to perform a pressing and straightening process in the later stage of bending. However, this step brings new problems. After pressing and straightening, the gap between the coils often cannot be adjusted synchronously, thus affecting the final quality and performance of the bend. Therefore, this invention provides an involute flat pipe bending device. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing an involute flat tube bending device. It overcomes the problems of needing to set different tube curvatures with three or more guide wheels to achieve tube bending, relying on changes in tube curvature to form the overall tube into a cone shape, which prevents the tube from being formed into a flat state, and the inability to synchronously adjust the gap between the rings after pressing to a flat state.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an involute flat pipe bending device, comprising a base plate, a fixing assembly on the base plate, the fixing assembly including an annular support frame, on which four strip-shaped sliding plates I, four strip-shaped sliding plates II, and four pressing sliding plates are movably arranged, an annular mounting seat is arranged between the four strip-shaped sliding plates I, four strip-shaped sliding plates II, and four pressing sliding plates, a central mold is fixedly arranged on the annular mounting seat, and a limiting unit is also provided on the annular support frame, the limiting unit being used to limit the position of the strip-shaped sliding plates I and the pressing sliding plates, an angle adjusting plate is also rotatably mounted on the base plate, the angle adjusting plate is provided with a propulsion assembly and an auxiliary assembly, the propulsion assembly including a propulsion ring frame, the auxiliary assembly including an auxiliary ring frame, and three centering sliding plates are slidably mounted in a circumferential array on both the auxiliary ring frame and the propulsion ring frame, each centering sliding plate being provided with a centering wheel, the centering wheel being used to limit the position of the pipe to be processed.

[0005] Furthermore, the annular support frame is fixedly installed on the base plate, and four strip-shaped sliding plates are slidably installed in a circular array on the annular support frame. Four strip-shaped sliding plates are slidably installed in a circular array on the annular support frame. The strip-shaped sliding plates are spaced apart and are equal in size. Four pressing sliding plates are also slidably installed in a circular array on the annular support frame. The strip-shaped sliding plates are arranged opposite to the pressing sliding plates.

[0006] Furthermore, the annular mounting base has eight circumferentially arranged engagement grooves that mate with the second strip slide plate. The end of the first strip slide plate closest to the axis of the annular mounting base is fixedly provided with a short support column. The engagement groove of the first strip slide plate is also provided with a through hole that mates with the short support column. The end of the pressing slide plate closest to the axis of the annular mounting base is an inclined surface. The annular mounting base also has four circumferentially arranged triangular grooves that mate with the end of the pressing slide plate closest to the axis of the annular mounting base.

[0007] Furthermore, eight transmission gears are rotatably mounted on the annular support frame in a circular array. A transmission gear ring is also rotatably mounted on the annular support frame. All transmission gears mesh with the transmission gear ring to form a gear pair. Transmission racks are fixedly installed on the sides of both the first and second strip-shaped slide plates. Transmission gears are rotatably mounted on the second transmission gear. A torsion spring is provided between the first and second transmission gears. The transmission rack meshes with the corresponding first transmission gear to form a gear rack pair.

[0008] Furthermore, four driven gears are rotatably mounted in a circular array on the annular support frame. Each driven gear is connected to the annular support frame by a torsion spring. A driven rack is fixedly mounted on the side of the pressing slide. The driven gears mesh with the corresponding driven racks to form a gear rack pair. Each driven gear is fixedly mounted with a driven gear two. A driven gear ring is also rotatably mounted on the annular support frame. Each driven gear two meshes with the driven gear ring to form a gear pair.

[0009] Furthermore, two L-shaped support plates are fixedly arranged in a circumferential array on the transmission gear ring, and a transmission push rod is fixedly arranged on each L-shaped support plate. Two driven short plates are also fixedly arranged in a circumferential array on the driven gear ring, and the transmission push rod is used to push the driven short plates to move.

[0010] Furthermore, the limiting unit includes a limiting inner ratchet ring slidably mounted on the annular support frame, and a limiting outer ratchet ring fixedly mounted on the driven gear ring. When the limiting inner ratchet ring and the limiting outer ratchet ring are engaged, they form a ratchet mechanism. A limiting short rod is also fixedly mounted on the L-shaped support plate. Two fan-shaped plates are also fixedly mounted in a circumferential array on the limiting inner ratchet ring. A limiting inclined plate is fixedly mounted on each fan-shaped plate. The two limiting inclined plates are located at the ends of the two fan-shaped plates that are furthest apart. The limiting short rod and the limiting inclined plate are used to adjust the position of the limiting inner ratchet ring.

[0011] Furthermore, the auxiliary ring frame is fixedly installed on the angle-adjusting rotating plate, and the propulsion ring frame is slidably installed on the angle-adjusting rotating plate. The axes of the auxiliary ring frame and the propulsion ring frame are on the same straight line. Centering gear rings are rotatably installed on both the auxiliary ring frame and the propulsion ring frame. Three arc-shaped sliding plates are fixedly arranged in a circumferential array on the centering gear rings. Centering short rods are fixedly installed at the ends of the centering slide plates that are farthest from the axis of the auxiliary ring frame. The centering short rods are movably connected to the corresponding arc-shaped sliding plates. The centering wheel on the auxiliary ring frame is rotatably connected to the corresponding centering slide plate. The centering wheel on the propulsion ring frame is fixedly connected to the corresponding centering slide plate.

[0012] Furthermore, a pressing disc is slidably mounted on the base plate. The axes of the pressing disc and the annular mounting base are on the same straight line, and the surfaces of the strip slide plate one and strip slide plate two closest to the pressing disc are on the same plane.

[0013] The beneficial effects of this invention compared with the prior art are as follows: (1) By setting a fixed component, this invention can easily replace the annular mounting seat with the required central mold according to the needs, adapting to the bending requirements of pipe columns of different specifications and sizes. (2) By setting a propulsion component, this invention can realize the automatic conveying of pipes, and with the cooperation of auxiliary components, it can provide auxiliary support for the position of the pipe closest to the fixed component, thereby preventing the pipe from bending before bending. (3) By setting a limiting unit, this invention can limit the position of the strip slide plate and the pressing slide plate, thereby improving the stability of the central mold. (4) Through the mutual cooperation of the fixed component, the propulsion component, and the auxiliary component, and under the action of the pressing circular plate, this invention can meet the bending requirements of involute flat coils of different pipe diameters. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a top view of the overall structure of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the fixing component of the present invention.

[0017] Figure 4 This is a schematic diagram of the transmission gear ring of the present invention.

[0018] Figure 5 This is a schematic diagram of the driven gear ring of the present invention.

[0019] Figure 6 This is a schematic diagram of the adjusting gear ring of the present invention.

[0020] Figure 7 This is a front view of the structure at the limiting inclined plate of the present invention.

[0021] Figure 8 This is a schematic diagram of the structure at the driven short plate of the present invention.

[0022] Figure 9 This is a schematic diagram of the structure of the angle-adjusting plate of the present invention.

[0023] Figure 10 This is a schematic diagram of the centering gear ring of the present invention.

[0024] Reference numerals: 101-Base plate; 102-Angle adjusting plate; 103-Pressing circular plate; 104-Feed screw; 105-Feed motor; 106-Annular support frame; 107-Angle adjusting motor; 108-Auxiliary ring frame; 109-Push ring frame; 110-Push screw; 111-Push motor; 112-Centering wheel; 113-Centering gear ring; 114-Centering slide plate; 115-Centering gear; 116-Centering motor; 117-Centering short rod; 118-Arc-shaped slide plate; 119-Annular mounting base; 120-Central mold; 121-Strip slide plate one; 122-Strip slide plate two; 123 - Limiting inner ratchet ring; 124 - Driven gear ring; 125 - Limiting outer ratchet ring; 126 - Transmission gear ring; 127 - Transmission rack; 128 - Transmission gear one; 129 - Transmission gear two; 130 - Pressing slide plate; 131 - Driven rack; 132 - Driven gear one; 133 - Driven gear two; 134 - Engaging groove; 135 - Triangular groove; 136 - Adjusting gear ring; 137 - Adjusting motor; 138 - Adjusting gear; 139 - Fan-shaped strip; 140 - L-shaped support plate; 141 - Limiting short rod; 142 - Limiting inclined plate; 143 - Supporting short column; 144 - Driven short plate; 145 - Transmission push rod. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] Example: Reference Figures 1-10 An involute flat bending tube device includes a base plate 101. The base plate 101 is provided with a fixing component, which includes an annular support frame 106. The annular support frame 106 is fixedly installed on the base plate 101. Four strip-shaped sliding plates 121, four strip-shaped sliding plates 122, and four pressing sliding plates 130 are movably arranged on the annular support frame 106. The four strip-shaped sliding plates 121 and the four strip-shaped sliding plates 122 are slidably installed on the annular support frame 106 in a circumferential array. The strip-shaped sliding plates 121 and 122 are spaced apart and are equal in size. The four pressing sliding plates 130 are also slidably installed on the annular support frame 106 in a circumferential array. The strip-shaped sliding plates 122 and the pressing sliding plates 130 are arranged opposite each other.

[0027] An annular mounting base 119 is provided between four strip-shaped sliding plates 121, four strip-shaped sliding plates 122, and four pressing sliding plates 130. A central mold 120 is fixedly mounted on the annular mounting base 119. Eight engagement grooves 134 that mate with strip-shaped sliding plates 122 are arranged in a circular array on the annular mounting base 119. Supporting short columns 143 are fixedly provided at the ends of strip-shaped sliding plates 121 that are closest to the axis of the annular mounting base 119. Through holes that mate with supporting short columns 143 are also provided on the engagement grooves 134 of strip-shaped sliding plates 121.

[0028] Eight transmission gears 129 are rotatably mounted in a circular array on the annular support frame 106. A transmission gear ring 126 is also rotatably mounted on the annular support frame 106. All transmission gears 129 mesh with the transmission gear ring 126 to form a gear pair. Transmission racks 127 are fixedly mounted on the sides of the strip-shaped slide 121 and strip-shaped slide 122. Transmission gears 128 are rotatably mounted on the transmission gears 129. A torsion spring is provided between the transmission gears 128 and the transmission gears 129. One end of the torsion spring is fixedly connected to the transmission gear 128, and the other end of the torsion spring is fixedly connected to the transmission gear 129. The transmission racks 127 mesh with the corresponding transmission gears 128 to form a gear rack pair.

[0029] The drive gear ring 126 rotates, and the eight drive gears 129 rotate synchronously. Under the action of the torsion spring between the drive gear 128 and the drive gear 129, the drive gear 128 rotates synchronously. Under the action of the drive rack 127, the four strip-shaped slide plates 121 and 122 move synchronously towards the axis of the drive gear ring 126 or synchronously away from the axis of the drive gear ring 126. According to the size of the annular mounting base 119 to be installed, the strip-shaped slide plates 121 and 122 are moved to the designated position. Then, the engaging groove 134 on the annular mounting base 119 engages with the strip-shaped slide plates 121 and 122. When slide plate 122 engages, the through hole on the engagement groove 134 engages with the corresponding support short column 143, thus realizing the installation of the annular mounting base 119. At this time, the drive gear ring 126 continues to rotate. Since slide plates 121 and 122 engage with the corresponding engagement groove 134, slide plates 121 and 122 cannot continue to move towards the axis of the drive gear ring 126. That is, the drive gear 128 cannot continue to rotate. The torsion spring between drive gear 128 and drive gear 129 is compressed. Under the action of the drive gear ring 126, drive gear 129 continues to rotate relative to drive gear 128.

[0030] The end of the pressing slide plate 130 closest to the axis of the annular mounting base 119 is inclined. The annular mounting base 119 also has four triangular grooves 135 arranged in a circular array to mate with the end of the pressing slide plate 130 closest to the axis of the annular mounting base 119. The annular support frame 106 has four driven gears 132 arranged in a circular array for rotation. Each driven gear 132 is connected to the annular support frame 106 by a torsion spring. One end of the torsion spring is fixedly connected to the driven gear 132, and the other end of the torsion spring is fixedly connected to the annular support frame 106. Each side of the pressing slide plate 130 is fixedly provided with a driven rack 131. The driven gear 132 meshes with the corresponding driven rack 131 to form a gear rack pair. Each driven gear 132 is fixedly installed with a driven gear 133. The annular support frame 106 is also rotatably installed with a driven gear ring 124. Each driven gear 133 meshes with the driven gear ring 124 to form a gear pair.

[0031] The driven gear ring 124 is driven to rotate, causing the four driven gears 133 to rotate synchronously, and the four driven gears 132 to rotate synchronously as well. The torsion spring between the driven gear 132 and the annular support frame 106 is compressed. Under the action of the driven rack 131, the four pressing slides 130 move towards the axis of the driven gear ring 124. The inclined surface of the end of the pressing slide 130 closest to the axis of the driven gear ring 124 contacts the corresponding triangular groove 135. Under the action of the surface and the triangular groove 135, the annular mounting base 119 moves towards the strip slide plate 121, so that the through hole on the engagement groove 134 is fully engaged with the corresponding support column 143. At this time, the end of the pressing slide plate 130 is fully engaged with the corresponding triangular groove 135. That is, under the action of the strip slide plate 121, the strip slide plate 122, the pressing slide plate 130, the engagement groove 134, the triangular groove 135, and the support column 143, the annular mounting base 119 is fixed.

[0032] Two L-shaped support plates 140 are fixedly arranged in a circular array on the transmission gear ring 126. A transmission push rod 145 is fixedly arranged on each L-shaped support plate 140. Two driven short plates 144 are also fixedly arranged in a circular array on the driven gear ring 124. The transmission push rod 145 is used to push the driven short plates 144 to move.

[0033] In the initial position, strip slide 121, strip slide 2 122, and pressing slide 130 are all located at the position furthest from the axis of the transmission gear ring 126. At this time, the torsion spring between driven gear 132 and the ring support frame 106, as well as the torsion spring between transmission gear 128 and transmission gear 2 129, are not compressed, and the transmission push rod 145 is in contact with the corresponding driven short plate 144.

[0034] The drive gear ring 126 rotates, and the L-shaped support plate 140 on the drive gear ring 126 rotates synchronously, causing the drive push rod 145 to rotate synchronously as well. At this time, the drive push rod 145 rotates away from the driven short plate 144 it is in contact with. After the positions of the first strip slide plate 121 and the second strip slide plate 122 are adjusted, and then the annular mounting seat 119 is installed on the first strip slide plate 121 and the second strip slide plate 122, the drive gear ring 126 continues to rotate, and the torque between the first drive gear 128 and the second drive gear 129... The spring is compressed, and the transmission push rod 145 continues to rotate, eventually causing the transmission push rod 145 to contact another driven short plate 144. At this time, the transmission gear ring 126 rotates 180 degrees relative to the annular support frame 106. The transmission gear ring 126 continues to rotate. Under the action of the driven short plate 144 and the transmission push rod 145, the driven gear ring 124 rotates synchronously, so that the driven gear 133 rotates and the driven gear 132 rotates synchronously. The torsion spring between the driven gear 132 and the annular support frame 106 is compressed.

[0035] The annular support frame 106 is also provided with a limiting unit, which is used to limit the position of the strip slide 121 and the pressing slide 130. The limiting unit includes a limiting inner ratchet ring 123 that is slidably installed on the annular support frame 106. Springs are symmetrically arranged between the limiting inner ratchet ring 123 and the annular support frame 106. A limiting outer ratchet ring 125 is also fixedly installed on the driven gear ring 124. When the limiting inner ratchet ring 123 and the limiting outer ratchet ring 125 are engaged, they form a ratchet mechanism.

[0036] A limiting short rod 141 is also fixedly installed on the L-shaped support plate 140, and two fan-shaped strips 139 are fixedly arranged in a circular array on the limiting inner ratchet ring 123. A limiting inclined plate 142 is fixedly installed on each fan-shaped strip 139. The two limiting inclined plates 142 are located at the ends of the two fan-shaped strips 139 that are furthest apart. The limiting short rod 141 and the limiting inclined plate 142 are used to adjust the position of the limiting inner ratchet ring 123.

[0037] In the initial position, that is, strip slide 121, strip slide 2 122, and pressing slide 130 are all located at the position farthest from the axis of transmission gear ring 126. At this time, the limiting short rod 141 is located on the upper surface of the corresponding fan-shaped strip 139. Under the action of the limiting short rod 141, the spring between the limiting inner ratchet ring 123 and the annular support frame 106 is in a compressed state, that is, the limiting inner ratchet ring 123 and the limiting outer ratchet ring 125 are not engaged at this time.

[0038] The drive gear ring 126 rotates, and the limiting rod 141 rotates synchronously, that is, the limiting rod 141 rotates on the upper surface of the sector plate 139. When the first and second slide plates 121 and 122 can no longer move, the drive gear ring 126 continues to rotate, that is, the limiting rod 141 continues to rotate, and then the limiting rod 141 moves to the position of the limiting inclined plate 142 on the sector plate 139. The drive gear ring 126 continues to rotate, and the limiting rod 141 moves along the inclined surface of the limiting inclined plate 142, that is, the limiting rod 141 contacts the pressing surface of the sector plate 139. When the spring between the inner ratchet ring 123 and the annular support frame 106 is pressed, it begins to return to its original state, eventually causing the limiting short rod 141 to completely disengage from the limiting inclined plate 142. At this time, the spring between the inner ratchet ring 123 and the annular support frame 106 is fully restored, meaning that the inner ratchet ring 123 and the outer ratchet ring 125 are engaged to form a ratchet mechanism. At this time, the transmission gear ring 126 rotates 180 degrees relative to the annular support frame 106. The transmission gear ring 126 continues to rotate, and the driven gear ring 124 rotates synchronously. The limiting short rod 141 rotates below the sector plate 139 at this time.

[0039] When the inner ratchet ring 123 and the outer ratchet ring 125 are engaged to form a ratchet mechanism, the outer ratchet ring 125 cannot rotate in the opposite direction relative to the annular support frame 106, thus restricting the rotation direction of the driven gear ring 124 and locking the position of the pressing slide plate 130. When the pressing slide plate 130 cannot move, the annular mounting base 119 cannot be removed, and under the action of the support short column 143, the strip slide plate 121 cannot move freely, thus locking the positions of the strip slide plate 121 and the pressing slide plate 130.

[0040] When the annular mounting base 119 needs to be replaced, the drive gear ring 126 rotates in the reverse direction. At this time, the driven gear ring 124 cannot rotate in the reverse direction under the action of the inner limiting ratchet ring 123 and the outer limiting ratchet ring 125. That is, the driven gear ring 124 cannot rotate relative to the outer limiting ratchet ring 125. The torsion spring between the second transmission gear 129 and the first transmission gear 128 begins to return to its original state. The limiting short rod 141 rotates towards the limiting inclined plate 142, eventually making the limiting short rod 141 contact the limiting inclined plate 142. The drive gear ring 126 continues to rotate, and the limiting short rod 141 moves along the inclined surface of the limiting inclined plate 142. Under the action of the limiting short rod 141 and the limiting inclined plate 142, the sector strip 139 moves away from the driven gear ring 124, thus achieving the limiting. The spring between the inner ratchet ring 123 and the annular support frame 106 is compressed, and the final limiting rod 141 moves to the upper surface of the fan-shaped strip 139. At this time, the limiting inner ratchet ring 123 disengages from the limiting outer ratchet ring 125, and the torsion spring between the first transmission gear 128 and the second transmission gear 129 has not fully recovered. When the limiting inner ratchet ring 123 and the limiting outer ratchet ring 125 disengage, the driven gear 132 rotates under the action of the torsion spring between the driven gear 132 and the annular support frame 106, so that the pressing slide plate 130 moves away from the axis of the driven gear ring 124. Finally, the pressing slide plate 130 moves to the position farthest from the axis of the driven gear ring 124, that is, the pressing slide plate 130 releases the restriction on the position of the annular mounting seat 119.

[0041] An angle-adjusting plate 102 is rotatably mounted on the base plate 101. An angle-adjusting motor 107 is fixedly mounted on the base plate 101. The output shaft of the angle-adjusting motor 107 is fixedly connected to the angle-adjusting plate 102. The angle-adjusting plate 102 is provided with a propulsion assembly and an auxiliary assembly. The propulsion assembly includes a propulsion ring frame 109, which is slidably mounted on the angle-adjusting plate 102. A propulsion screw 110 is rotatably mounted on the angle-adjusting plate 102. The propulsion screw 110 and the propulsion ring frame 109 form a helical pair. A propulsion motor 111 is fixedly mounted on the angle-adjusting plate 102. The output shaft of the propulsion motor 111 is fixedly connected to the propulsion screw 110. The auxiliary assembly includes an auxiliary ring frame 108, which is fixedly mounted on the angle-adjusting plate 102. The axes of the auxiliary ring frame 108 and the propulsion ring frame 109 are on the same straight line.

[0042] Both the auxiliary ring frame 108 and the propulsion ring frame 109 have three centering slide plates 114 slidably mounted in a circumferential array. Each centering slide plate 114 is equipped with a centering wheel 112, which is used to limit the position of the pipe to be processed. The centering wheel 112 on the auxiliary ring frame 108 is rotatably connected to the corresponding centering slide plate 114, while the centering wheel 112 on the propulsion ring frame 109 is fixedly connected to the corresponding centering slide plate 114. Both the auxiliary ring frame 108 and the propulsion ring frame 109 have a rotatably mounted centering gear ring 113. Both the auxiliary ring frame 108 and the propulsion ring frame 109 are fixedly equipped with a centering motor 116. A centering gear 115 is fixedly installed on the output shaft of the centering motor 116. The centering gear 115 and the corresponding centering gear ring 113 form a gear pair. Three arc-shaped slide plates 118 are fixedly arranged in a circumferential array on the centering gear ring 113. A centering short rod 117 is fixedly installed at the end of the centering slide plate 114 that is farthest from the axis of the auxiliary ring frame 108. The centering short rod 117 is movably connected to the corresponding arc-shaped slide plate 118.

[0043] Initially, the centering slides 114 are located at their furthest points from the axis of the auxiliary ring frame 108. Based on the length of the pipe to be processed, the propulsion motor 111 is activated to drive the propulsion screw 110 to rotate, thereby causing the propulsion ring frame 109 to move closer to the auxiliary ring frame 108. This adjusts the distance between the auxiliary ring frame 108 and the propulsion ring frame 109, placing both ends of the pipe to be processed at the center positions of the auxiliary ring frame 108 and the propulsion ring frame 109, respectively. Then, the two centering motors 116 are activated to drive the corresponding centering gears 11. 5. Rotation causes the centering gear ring 113 to rotate relative to the axis of the auxiliary ring frame 108. The three arc-shaped sliding plates 118 on the centering gear ring 113 rotate synchronously. Under the action of the centering short rod 117, the centering slide plate 114 moves towards the axis of the auxiliary ring frame 108, so that the centering wheel 112 contacts the surface of the pipe fitting. Under the action of multiple centering wheels 112, the centering adjustment of the pipe fitting is realized. And under the action of the centering wheel 112 on the push ring frame 109, the clamping and fixing of the pipe fitting is realized.

[0044] At this time, the propulsion motor 111 is started, causing the propulsion ring frame 109 to move towards the auxiliary ring frame 108. Under the action of the centering wheel 112 on the propulsion ring frame 109, the pipe moves synchronously, and the centering wheel 112 on the auxiliary ring frame 108 rotates.

[0045] A pressing disc 103 is slidably mounted on the base plate 101. A feed screw 104 is rotatably mounted on the base plate 101. A feed motor 105 is fixedly mounted on the base plate 101. The output shaft of the feed motor 105 is fixedly connected to the feed screw 104.

[0046] 104 and the pressing disc 103 form a helical pair. The axes of the pressing disc 103 and the annular mounting base 119 are on the same straight line. The surfaces of the strip slide 121 and the strip slide 122 closest to the pressing disc 103 are on the same plane. The feed motor 105 is started to drive the feed screw 104 to rotate, so that the pressing disc 103 moves along the axis of the feed screw 104.

[0047] An adjusting gear ring 136 is rotatably mounted on the annular support frame 106. The adjusting gear ring 136 is fixedly connected to two L-shaped support plates 140. The axes of the adjusting gear ring 136 and the driven gear ring 124 are on the same straight line. An adjusting motor 137 is fixedly mounted on the annular support frame 106. An adjusting gear 138 is fixedly mounted on the output shaft of the adjusting motor 137. The adjusting gear 138 and the adjusting gear ring 136 mesh to form a gear pair. When the adjusting motor 137 is started, it drives the adjusting gear 138 to rotate, and the adjusting gear ring 136 rotates. Under the action of the L-shaped support plates 140, the transmission gear ring 126 rotates synchronously.

[0048] Working principle: Based on the size of the pipe fitting to be bent and the desired shape of the involute curve, select an annular mounting base 119 equipped with a corresponding central mold 120. Then, start the adjusting motor 137 to drive the adjusting gear ring 136 to rotate. The transmission gear ring 126 rotates synchronously. Adjust the positions of strip slide one 121 and strip slide two 122 according to the required size of the annular mounting base 119. When adjusted to the designated position, install the annular mounting base 119 onto strip slide one 121 and strip slide two 122. Then, continue to drive the transmission gear ring 126 to rotate. The transmission gear one 128 and transmission gear two 129... The torsion spring is compressed, causing the limiting short rod 141 to disengage from the sector strip 139 and the limiting inclined plate 142. At this time, the transmission gear ring 126 rotates 180 degrees relative to the annular support frame 106, and the transmission push rod 145 contacts the corresponding driven short plate 144. The transmission gear ring 126 continues to rotate. Under the action of the driven short plate 144 and the transmission push rod 145, the driven gear ring 124 rotates synchronously. The limiting outer ratchet ring 125 rotates relative to the limiting inner ratchet ring 123. Under the action of the driven gear ring 124, the end of the pressing slide plate 130 engages with the corresponding triangular groove 135, thereby fixing the annular mounting seat 119.

[0049] Then, the propulsion motor 111 is started to adjust the distance between the auxiliary ring frame 108 and the propulsion ring frame 109. The two ends of the pipe are placed inside the auxiliary ring frame 108 and the propulsion ring frame 109 respectively. Then, the centering motor 116 is started to move the centering slide plate 114 towards the axis of the auxiliary ring frame 108. Finally, the centering wheel 112 contacts the surface of the pipe. That is, the centering adjustment and fixation of the pipe are achieved under the action of the centering wheel 112. Then, the angle adjustment motor 107 is started to drive the angle adjustment plate 102 to rotate relative to the base plate 101, so that the axis of the auxiliary ring frame 108 moves to be on the same straight line as the axis of the annular mounting seat 119.

[0050] Restart the propulsion motor 111 to move the propulsion ring frame 109 closer to the auxiliary ring frame 108. The tube moves synchronously, and the centering wheel 112 on the auxiliary ring frame 108 rotates relative to the tube. Finally, the end of the tube furthest from the propulsion ring frame 109 moves into the interior of the central mold 120. Then, start the angle adjustment motor 107 to drive the angle adjustment plate 102 to rotate, so that the tube at the end of the central mold 120 rotates. Adjust the angle between the axis of the auxiliary ring frame 108 and the axis of the annular mounting base 119 according to the required size of the involute.

[0051] After the axis of the auxiliary ring frame 108 is positioned relative to the annular mounting base 119, the propulsion motor 111 is started, causing the propulsion ring frame 109 to continue moving closer to the auxiliary ring frame 108. The pipe moves synchronously, and the pipe, located at the position of the central mold 120, forms an involute shape towards the outside of the central mold 120. After the propulsion ring frame 109 moves to the position closest to the auxiliary ring frame 108, the involute bend of the pipe is completed. During the pipe bending process, the feed motor 105 is started to drive the pressing circular plate 103 to move closer to the annular support frame 106. Under the action of the plane formed by the pressing circular plate 103, the strip slide plate 121, and the strip slide plate 122, the bent pipe becomes flat.

[0052] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the protection scope of this invention.

Claims

1. An involute flat pipe bending device, comprising a base plate (101), characterized in that: The base plate (101) is provided with a fixing component, which includes an annular support frame (106). Four strip-shaped slide plates one (121), four strip-shaped slide plates two (122), and four pressing slide plates (130) are movably arranged on the annular support frame (106). An annular mounting seat (119) is provided between the four strip-shaped slide plates one (121), four strip-shaped slide plates two (122), and four pressing slide plates (130). A central mold (120) is fixedly arranged on the annular mounting seat (119). The annular support frame (106) is also provided with a limiting unit, which is used to limit the position of the strip-shaped slide plates one (121) and the pressing slide plates (130). An angle-adjusting plate (102) is rotatably mounted on the base plate (101). The angle-adjusting plate (102) is provided with a propulsion assembly and an auxiliary assembly. The propulsion assembly includes a propulsion ring frame (109), and the auxiliary assembly includes an auxiliary ring frame (108). Both the auxiliary ring frame (108) and the propulsion ring frame (109) are slidably mounted with three centering slide plates (114) in a circumferential array. Each centering slide plate (114) is provided with a centering wheel (112). The centering wheel (112) is used to limit the position of the pipe to be processed. The annular support frame (106) is fixedly installed on the base plate (101). The four strip-shaped slide plates (121) are slidably installed on the annular support frame (106) in a circular array. The four strip-shaped slide plates (122) are slidably installed on the annular support frame (106) in a circular array. The strip-shaped slide plates (121) and (122) are spaced apart. The strip-shaped slide plates (121) and (122) are of equal size. The four pressing slide plates (130) are also slidably installed on the annular support frame (106) in a circular array. The strip-shaped slide plates (122) and (130) are arranged opposite to each other. The annular mounting base (119) is provided with eight engagement grooves (134) arranged in a circular array to mate with the second strip slide plate (122). The end of the first strip slide plate (121) closest to the axis of the annular mounting base (119) is fixedly provided with a short support column (143). The engagement groove (134) corresponding to the first strip slide plate (121) is also provided with a through hole that mates with the short support column (143). The end of the pressing slide plate (130) closest to the axis of the annular mounting base (119) is an inclined surface. The annular mounting base (119) is also provided with four triangular grooves (135) arranged in a circular array to mate with the end of the pressing slide plate (130) closest to the axis of the annular mounting base (119). The annular support frame (106) is rotatably mounted with eight transmission gears (129) in a circular array. A transmission gear ring (126) is also rotatably mounted on the annular support frame (106). The transmission gears (129) mesh with the transmission gear ring (126) to form a gear pair. The sides of the strip slide plate (121) and the strip slide plate (122) are fixedly provided with transmission racks (127). The transmission gears (128) are rotatably mounted on the transmission gears (129). A torsion spring is provided between the transmission gears (128) and the transmission gears (129). The transmission racks (127) mesh with the corresponding transmission gears (128) to form a gear rack pair. The annular support frame (106) is rotatably mounted with four driven gears (132) arranged in a circular array. Each driven gear (132) is provided with a torsion spring between itself and the annular support frame (106). Each side of the pressing slide plate (130) is fixedly provided with a driven rack (131). The driven gears (132) mesh with the corresponding driven racks (131) to form a gear rack pair. Each driven gear (132) is fixedly mounted with a driven gear (133). A driven gear ring (124) is also rotatably mounted on the annular support frame (106). Each driven gear (133) meshes with the driven gear ring (124) to form a gear pair. The transmission gear ring (126) has two L-shaped support plates (140) fixedly arranged in a circular array. Each L-shaped support plate (140) is fixedly equipped with a transmission push rod (145). The driven gear ring (124) also has two driven short plates (144) fixedly arranged in a circular array. The transmission push rod (145) is used to push the driven short plates (144) to move. The limiting unit includes a limiting inner ratchet ring (123) slidably mounted on an annular support frame (106), and a limiting outer ratchet ring (125) fixedly mounted on the driven gear ring (124). When the limiting inner ratchet ring (123) and the limiting outer ratchet ring (125) are engaged, they form a ratchet mechanism. A limiting short rod (141) is also fixedly mounted on the L-shaped support plate (140). Two fan-shaped strips (139) are also fixedly mounted in a circular array on the limiting inner ratchet ring (123). A limiting inclined plate (142) is fixedly mounted on each of the fan-shaped strips (139). The two limiting inclined plates (142) are located at the ends of the two fan-shaped strips (139) that are furthest apart. The limiting short rod (141) and the limiting inclined plate (142) are used to adjust the position of the limiting inner ratchet ring (123).

2. The involute flat tube bending device according to claim 1, characterized in that: The auxiliary ring frame (108) is fixedly installed on the angle-adjusting rotating plate (102), and the propulsion ring frame (109) is slidably installed on the angle-adjusting rotating plate (102). The axes of the auxiliary ring frame (108) and the propulsion ring frame (109) are on the same straight line. A centering gear ring (113) is rotatably installed on both the auxiliary ring frame (108) and the propulsion ring frame (109). Three arc-shaped sliding groove plates (113) are fixedly arranged in a circumferential array on the centering gear ring (113). 18) The centering slide (114) is fixedly provided with a centering short rod (117) at the end furthest from the axis of the auxiliary ring frame (108). The centering short rod (117) is movably connected to the corresponding arc-shaped slide plate (118). The centering wheel (112) on the auxiliary ring frame (108) is rotatably connected to the corresponding centering slide (114). The centering wheel (112) on the propulsion ring frame (109) is fixedly connected to the corresponding centering slide (114).

3. The involute flat tube bending device according to claim 2, characterized in that: A pressing disc (103) is also slidably mounted on the base plate (101). The axes of the pressing disc (103) and the annular mounting base (119) are on the same straight line. The surfaces of the strip slide plate one (121) and the strip slide plate two (122) closest to the pressing disc (103) are on the same plane.

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