Improved Bundy tube pushing and expanding machine
By designing an improved rectangular frame structure and a double cylinder fin compression device in the Bondi pipe expander, the problems of insufficient tightness of fin compression and long pipe replacement and maintenance time in the prior art are solved, and more efficient processing and better quality products are achieved.
Patent Information
- Application Number
- CN202510368649.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-05-09
AI Technical Summary
The existing Bondi pipe expanders are insufficient in the compression fins and have too long replacement and maintenance time when the metal pipe is bent, resulting in low processing efficiency.
An improved Bondi pipe expander is designed, and a frame with a rectangular frame structure is equipped with a gear reduction motor, a front U positioning mechanism, a rear precise positioning pushing mechanism, a front guide pipe guard mechanism, a rear plate mechanism and a double cylinder fin compression device. The device coordinates the work of each component through the control system, enabling stronger fin compression and faster pipe replacement.
Through the improved design, the firmness of the fin pressing device is greatly improved, making it less likely to be misaligned between the pipe and the fin; when the metal pipe is bent, it can be replaced and repaired quickly, significantly shortening the maintenance time and improving processing efficiency and product quality.
Smart Images
Figure CN119951948A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heat dissipation tube processing, in particular to an improved Bundy tube expanding machine. Background Art
[0002] The Bundy tube refers to a thin steel tube with a diameter of 4.6-10.6, which is mainly used as a liquid and air duct for automobiles and refrigerators. It has superior performance, mainly reflected in: it has vibration crack resistance and high pressure resistance. Its vibration fatigue resistance is 2-3 times higher than that of the Bundy tube or aluminum alloy tube; it has good processing performance and can be bent into a very small radius; it has high dimensional accuracy and good surface quality; and it is relatively cheap. In the processing of the Bundy tube, it is necessary to set an aluminum heat sink on the outside of the Bundy tube to increase the heat resistance, high pressure resistance and heat dissipation performance of the Bundy tube. However, the current equipment for setting aluminum heat sinks on Bundy tubes has some defects. For example, patent CN218926040 U discloses a Bundy tube expansion machine, which has a fin clamping device that is a single cylinder clamping device, and the clamping firmness is insufficient.
[0003] In addition, if the metal tube is bent in the front guide section and the rear penetration section of the existing Bundy tube expander, the tooling needs to be disassembled to replace the bent tube, which takes too long to repair and results in low processing efficiency.
[0004] The present invention provides an improved Bundy tube expander, which improves the above-mentioned parts, greatly shortens the time for replacing the bent tube, and makes the fin pressing part more firm, thereby improving product efficiency and product quality. Summary of the invention
[0005] The main purpose of the present invention is to provide an improved Bundy tube expander so as to effectively solve the problems raised in the background technology.
[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an improved Bundy tube push-up machine, comprising a frame with a rectangular frame structure, a reduction motor is arranged at the lower left part of the frame, a front U positioning mechanism is arranged at the top left part of the frame, a guide section is arranged on the right side of the front U positioning mechanism, and the guide section is composed of a plurality of separate tube protection mechanisms fixed on a conveying chain and driven by a reduction motor; the right end of the guide section is a rear precise positioning and pushing-up mechanism, the right side of the rear precise positioning and pushing-up mechanism is a front guide tube protection mechanism, the right side of the front guide tube protection mechanism is a row segment, the row segment is provided with a rear row mechanism, a plurality of fin pressing devices are arranged at intervals of the row segment, a rear clamping mechanism and a rear demolding mechanism are arranged on the lower side of the top surface of the frame; in addition, a control system is arranged to control the coordinated work of various components.
[0007] Preferably, the pipe protection mechanism includes a pipe pressing mechanism, a guide plate, and a guide plate shifting mechanism; the pipe pressing mechanism includes a perforated plate seat, the perforated plate seat is provided with a plurality of evenly distributed grooves along the length direction, and a pressure plate is fixed on each partition between the grooves with a pressure plate bolt; the guide plate is divided into a front guide plate and a rear guide plate, which are respectively located on both sides of the perforated plate seat, the perforated plate seat, the front guide plate, and the rear guide plate are all arranged on a bottom plate, the front guide plate and the rear guide plate are fixedly connected to the bottom plate, and the sides are fixedly connected to a side seat respectively, a blind hole is arranged at both ends of the perforated plate seat, and a guide screw is arranged on the side seat, the front end of the guide screw is inserted into the blind hole to fix the perforated plate seat, and ensure that the perforated plate seat can move along the guide screw;
[0008] A central axis is arranged in the middle of the pressure hole plate seat, and a long groove is arranged on the bottom plate below the central axis. The central axis passes through the long groove and protrudes to the lower side of the bottom plate. A roller bearing is installed at the lower end of the central axis. The guide plate shifting mechanism includes a movable left plate and a movable right plate arranged on both sides of the roller bearing. The movable left plate and the movable right plate are movably placed on the base plate, and the base plate is fixed on the frame. The movable left plate and the movable right plate are connected together with a movable shaft on the lower side of the roller bearing, and one end of the movable shaft is fixedly connected to the cylinder push rod.
[0009] Preferably, a plurality of evenly distributed front conical holes are provided on the front guide plate, and a rear conical hole concentric with the front conical hole is provided on the rear guide plate. The major diameters of the rear conical holes and the front conical holes are both toward the front end of the equipment, so as to facilitate the insertion of the Bondi tube to be processed into the conical hole. Both the rear conical hole and the front conical hole are U-shaped holes opening upward.
[0010] Preferably, when the cylinder push rod contracts, it drives the moving left plate, and the moving right plate moves to the right. The moving left plate pushes the roller bearing to move to the right, driving the central axis to move to the right, and the orifice plate fixedly connected to the central axis moves to the right, and the pressure plate thereon moves to the right, and the Bondi tubes inserted into the U-shaped holes of the front guide plate and the rear guide plate are compressed. When the cylinder push rod is pushed out, the pressure plate moves to the left, and the Bondi tubes in the U-shaped holes of the front guide plate and the rear guide plate are loosened, so that the Bondi tubes can be taken out.
[0011] Preferably, the front guide pipe protection mechanism includes a bracket, an adjustment device, and a pipe protection device; the bracket includes a rectangular base, two columns are arranged on both sides of the base, cross beams are arranged on the top surfaces of the two columns, an adjustment device, i.e., an adjustment cylinder, is fixed on the cross beam, and a pipe protection device is arranged on the two columns, and the adjustment cylinder push rod is connected to the pipe protection device.
[0012] Preferably, the pipe protection device includes a fixed plate mounted on the bracket column with two sliding sleeves, a plurality of fixed clamps are fixed on the lower side of the fixed plate, each fixed clamp is configured with a movable clamp, the movable clamp is a U-shaped structure, the middle of the U-shaped side wall is fixed to the two side surfaces of the fixed plate with a fixing pin, and the U-shaped top end of the movable clamp is rotatably fixed to the two side surfaces of a pull plate with a movable pin.
[0013] Preferably, one end of the pull plate is connected to a connecting rod by a pin shaft, the connecting rod is connected to a perforated cylinder push rod, the perforated cylinder is fixed on the vertical plate, the vertical plate is fixed on the base, and the base is fixed on the frame.
[0014] Preferably, the adjustment device includes an adjusting cylinder, the adjusting cylinder push rod is connected to an N-type lifting arm, and the two arms of the N-type lifting arm are rotatably fixed on both sides of the middle of the fixed plate by adjusting pins; when the opening cylinder push rod is in the pushing state, the pull plate moves forward accordingly, and the multiple mobile card plates fixed on the pull plate fit with the corresponding fixed card plates, and when the opening cylinder push rod contracts, the mobile card plate rotates around the fixing pin, and the mobile card plate is separated from the corresponding fixed card plate; each mobile card plate is provided with a mobile card plate half hole at the lower end, and the fixed card plate matched thereto is provided with a fixed card plate half hole at the lower end, and when the two are closed, a complete synthetic hole is formed, and a tapered chamfer is provided at the entrance of the two semicircular holes.
[0015] Preferably, the fin clamping device includes a platform, a flap mechanism, a hook pressure plate mechanism, and a fin clamp; the fin clamp includes a left fin clamp and a right fin clamp for clamping the fins, both of which are arranged in parallel on the platform, and two pressure plates are respectively arranged on the upper sides of the left fin clamp and the right fin clamp, and the pressure plates are fixed on the lower side of a movable pressure plate, and a flap mechanism is arranged on the left side of the movable pressure plate, and a hook pressure plate mechanism is arranged on the right side.
[0016] Preferably, the flap mechanism includes two auxiliary plates fixed on both sides of the movable pressure plate, the two auxiliary plates are rotatably fixed to a vertical plate with a fixed left rotating shaft, the vertical plate is fixed on the platform, the lower end of the vertical plate passes through the platform, a left cylinder is fixed to the lower end of the vertical plate, and the head of the left cylinder push rod is rotatably fixed to the left end of the movable pressure plate with a pin.
[0017] Preferably, the hook pressure plate mechanism includes a fixed plate vertically fixed on the platform, and a "B"-shaped hook pressure plate is rotatably fixed on the fixed plate by a fixed right rotating shaft, the fixed right rotating shaft is located at the lower left corner of the "B" shape, and the lower right end of the "B"-shaped hook pressure plate is connected to the right cylinder push rod by a movable rotating shaft, and the lower end of the right cylinder is rotatably fixed to the lower end of the fixed plate, and the hook on the left side of the "B"-shaped hook pressure plate is pressed on the right end of the movable pressure plate.
[0018] The beneficial effects of the present invention are as follows: the fin pressing device of the Bundy tube expander is changed to a double-cylinder pressing device, which is more secure and less likely to cause misalignment between the tube and the fin; if the metal tube is bent at the front guide section and the rear end penetration section, the clamp can be easily opened to remove the deformed metal tube, which greatly shortens the maintenance time and improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Attached Figure 1 It is a schematic diagram of the structure of the present invention.
[0020] Attached Figure 2 It is a structural schematic diagram of the pipe pressing mechanism of the present invention when it is closed.
[0021] Attached Figure 3 It is a structural schematic diagram of the pipe pressing mechanism of the present invention when it is opened.
[0022] Attached Figure 4 It is a side view of the tube pressing mechanism of the present invention.
[0023] Attached Figure 5 It is a schematic diagram of the pressure plate seat and the pressure plate structure of the present invention.
[0024] Attached Figure 6 It is a front view of the perforated plate seat of the present invention.
[0025] Attached Figure 7 It is a top view of the perforated plate seat structure of the present invention.
[0026] Attached Figure 8 It is the front view of the front guide plate of the present invention.
[0027] Attached Fig. 9 It is a top view of the front guide plate of the present invention.
[0028] Attached Fig.10 It is the front view of the rear guide plate structure of the present invention.
[0029] Attached Fig.11 It is a top view of the rear guide plate structure of the present invention.
[0030] Attached Fig.12 It is a schematic diagram of the structure of the tube protection device after closing of the present invention.
[0031] Attached Fig.13 It is a schematic diagram of the structure of the pipe protection device after being opened.
[0032] Attached Fig.14 It is a schematic diagram of pipe threading of the present invention.
[0033] Attached Fig.15 It is a schematic diagram of the three-dimensional structure of the pipe protection device of the present invention.
[0034] Attached Fig.16 It is a schematic diagram of the three-dimensional structure of the fixed clamping plate and the fixed plate of the present invention.
[0035] Attached Fig.17 It is a schematic diagram of the three-dimensional structure of the mobile card board of the present invention.
[0036] Attached Fig.18 It is a schematic diagram of the structure of the present invention when the fins are compressed.
[0037] Attached Fig.19 It is a schematic diagram of the structure when the present invention is opened.
[0038] Attached Figure 1-19 In the middle, the frame A, the tube protection mechanism B, the reduction motor C, the front U positioning mechanism D, the rear precise positioning and pushing mechanism E, the front guide tube protection mechanism F, the rear sheet arrangement mechanism G, the fin pressing device H, the rear mold locking mechanism I, and the rear demoulding mechanism J;
[0039] Cylinder A1, side seat A2, guide screw A3, pressure plate A4, pressure plate bolt A5, middle shaft A6, roller bearing A7, movable left plate A8, movable right plate A9, base plate A10, front guide plate A11, pressure plate seat A12, rear guide plate A13, Bondi tube A14, bottom plate A15, rear tapered hole A16, front tapered hole A17;
[0040] Base B1, vertical plate B1-1, sliding sleeve B2, opening cylinder B3, connecting rod B4, pin B5, pull plate B6, column B7, n-type lifting arm B8, adjustment cylinder B9, moving pin B10, fixed pin B11, moving clamping plate B12, synthetic hole B13, fixed clamping plate B14, adjustment pin B15, fixed plate B16, fixed clamping plate half hole B17, moving clamping plate half hole B18, taper chamfer B19;
[0041] Right cylinder C1, fixed plate C2, platform C3, movable rotating shaft C4, fixed right rotating shaft C5, hook pressure plate C6, movable pressure plate C7, left fin clamp C8, clamping plate C9, fixed left rotating shaft C10, auxiliary plate C11, pin C12, cylinder push rod C13, left cylinder C14, right fin clamp C15, fin C16, vertical plate C17. DETAILED DESCRIPTION
[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0043] See attached Figure 1 An improved Bundy tube push-up machine comprises a frame A of a rectangular frame structure, a reduction motor C is arranged at the lower left part of the frame A, a front U positioning mechanism D is arranged at the top left of the frame A, a guide section is arranged on the right side of the front U positioning mechanism D, and the guide section is composed of a plurality of separate tube protection mechanisms B fixed on a conveying chain and driven by a reduction motor C; a rear precise positioning and pushing mechanism E is arranged at the right end of the guide section, a front guide tube protection mechanism F is arranged on the right side of the rear precise positioning and pushing mechanism E, a row segment is arranged on the right side of the front guide tube protection mechanism F, a row segment is arranged with a rear row mechanism G, and a plurality of fin pressing devices H are arranged at intervals of the row segment, and a rear clamping mechanism I and a rear demoulding mechanism J are arranged on the lower side of the top surface of the frame A; in addition, a control system is arranged to control the coordinated work of various components.
[0044] See attached Figure 2 —11, the pipe protection mechanism B includes a pipe pressing mechanism, a guide plate, and a guide plate shifting mechanism; the pipe pressing mechanism includes a perforated plate seat A12, the perforated plate seat A12 is provided with a number of evenly distributed grooves along the length direction, and a pressure plate A4 is fixed on each partition between the grooves with a pressure plate bolt A5; the guide plate is divided into a front guide plate A11 and a rear guide plate A13, which are respectively located on both sides of the perforated plate seat A12, the perforated plate seat A12, the front guide plate A11, and the rear guide plate A13 are all arranged on a bottom plate A15, the front guide plate A11 and the rear guide plate A13 are fixedly connected to the bottom plate A15, and the sides are fixedly connected to a side seat A2 respectively, a blind hole is arranged at both ends of the perforated plate seat A12, and a guide screw A3 is arranged on the side seat A2, the front end of the guide screw A3 is inserted into the blind hole to fix the perforated plate seat A12, and can ensure that the perforated plate seat A12 can move along the guide screw;
[0045] A central axis A6 is arranged in the middle of the pressure hole plate seat A12, and a long groove is arranged on the bottom plate A15 below the central axis. The central axis passes through the long groove and protrudes to the lower side of the bottom plate A15. A roller bearing A7 is installed at the lower end of the central axis A6. The guide plate shifting mechanism includes a movable left plate A8 and a movable right plate A9 arranged on both sides of the roller bearing A7. The movable left plate A8 and the movable right plate A9 are movably placed on the base plate A10, and the base plate A10 is fixed on the frame A. The movable left plate A8 and the movable right plate A9 are connected together by a movable shaft on the lower side of the roller bearing A7, and one end of the movable shaft is fixedly connected to the push rod of the cylinder A1.
[0046] The front guide plate A11 is provided with a plurality of evenly distributed front tapered holes A17, and the rear guide plate A13 is provided with a rear tapered hole A16 which is concentric with the front tapered hole A17. The major diameters of the rear tapered holes A16 and the front tapered holes A17 are both oriented toward the front end of the equipment to facilitate the insertion of the Bundy tube to be processed into the tapered holes. The rear tapered holes A16 and the front tapered holes A17 are both U-shaped holes opening upward.
[0047] When the push rod of cylinder A1 contracts, it drives the moving left plate A8 and the moving right plate A9 to move to the right. The moving left plate A8 pushes the roller bearing A7 to move to the right, drives the central axis A6 to move to the right, and the orifice plate A12 fixedly connected to the central axis A6 moves to the right. The pressure plate A4 thereon moves to the right, and the Bundy tube A14 inserted into the U-shaped holes of the front guide plate A11 and the rear guide plate A13 is pressed. When the push rod of cylinder A1 is pushed out, the pressure plate A4 moves to the left, and the Bundy tube A14 in the U-shaped holes of the front guide plate A11 and the rear guide plate A13 is released, so that the Bundy tube A14 can be taken out.
[0048] See attached Fig.12—17, the front guide pipe protection mechanism F includes a bracket, an adjusting device, and a pipe protection device; the bracket includes a rectangular base B1, two columns B7 are arranged on both sides of the base, cross beams are arranged on the top surfaces of the two columns B7, an adjusting device, i.e., an adjusting cylinder B9, is fixed on the cross beam, and a pipe protection device is arranged on the two columns B7, and the push rod of the adjusting cylinder B9 is connected to the pipe protection device.
[0049] The pipe protection device includes a fixed plate B16 which is sleeved on the bracket column B7 with two sliding sleeves B2, and a plurality of fixed card plates B14 are fixed on the lower side of the fixed plate B16. Each fixed card plate B14 is configured with a movable card plate B12. The movable card plate B12 is a U-shaped structure. The middle of the U-shaped side wall is fixed to the two side surfaces of the fixed plate B16 with a fixing pin B11, and the U-shaped top end of the movable card plate B12 is rotatably fixed to the two side surfaces of a pull plate B6 with a moving pin B10.
[0050] One end of the pull plate B6 is connected to a connecting rod B4 by a pin shaft B5, and the connecting rod B4 is connected to a push rod of an open hole cylinder B3, and the open hole cylinder B3 is fixed on the vertical plate B1-1, and the vertical plate B1-1 is fixed on the base B1, and the base B1 is fixed on the frame A.
[0051] The adjustment device includes an adjustment cylinder B9, a push rod of the adjustment cylinder B9 is connected to an n-type lifting arm B8, and the two arms of the n-type lifting arm B8 are rotatably fixed on both sides of the middle of the fixed plate B16 by an adjustment pin B15; when the push rod of the hole-opening cylinder B3 is in the pushing state, the pulling plate B6 moves forward accordingly, and the multiple mobile card plates B12 fixed on the pulling plate B6 fit with the corresponding fixed card plate B14; when the push rod of the hole-opening cylinder B3 contracts, the mobile card plate B12 rotates around the fixing pin B11, and the mobile card plate B12 is separated from the corresponding fixed card plate B14; each mobile card plate B12 is provided with a mobile card plate half hole B18 at the lower end, and the fixed card plate B14 matched thereto is provided with a fixed card plate half hole B17 at the lower end, and when the two are closed, a complete synthetic hole B13 is formed, and a taper chamfer B19 is provided at the entrance of the two semicircular holes.
[0052] See attached Fig.18 , 19 The fin clamping device H includes a platform, a flap mechanism, a hook pressure plate mechanism, and a fin clamp; the fin clamp includes a left fin clamp C8 and a right fin clamp C15 for clamping the fin C16, both of which are arranged in parallel on the platform C3, and two pressure plates C9 are respectively arranged on the upper sides of the left fin clamp C8 and the right fin clamp C15, and the pressure plate C9 is fixed on the lower side of a movable pressure plate C7, and a flap mechanism is arranged on the left side of the movable pressure plate C7, and a hook pressure plate mechanism is arranged on the right side.
[0053] The flap mechanism includes two auxiliary plates C11 fixed on both sides of the movable pressure plate C7. The two auxiliary plates C11 are rotatably fixed on a vertical plate C17 by a fixed left rotating shaft C10. The vertical plate C17 is fixed on the platform C3. The lower end of the vertical plate C17 passes through the platform C3. A left air cylinder C14 is fixed at the lower end of the vertical plate C17. The head of the push rod C13 of the left air cylinder C14 is rotatably fixed at the left end of the movable pressure plate C7 by a pin C12.
[0054] The hook head pressure plate mechanism includes a fixed plate C2 vertically fixed on the platform C3. A "Z"-shaped hook head pressure plate C6 is rotatably fixed on the fixed plate C2 by a fixed right rotating shaft C5. The fixed right rotating shaft C5 is located at the lower left corner of the "Z" shape. The right end of the lower side of the "Z"-shaped hook head pressure plate C6 is connected to the push rod of the right air cylinder C1 by a movable rotating shaft C4. The lower end of the right air cylinder C1 is rotatably fixed at the lower end of the fixed plate C2. The hook on the left side of the "Z"-shaped hook head pressure plate C6 presses on the right end of the movable pressure plate C7.
[0055] The production process of the present invention is as follows:
[0056] First step, place the blanking die on the blanking section and fix it on the frame A through the rear mold clamping mechanism I;
[0057] Second step, put the fin into the blanking head, and insert the fin C16 into the blanking die with the rear blanking mechanism G;
[0058] Third step, the fin pressing device H rotates and presses down to press the fin C16;
[0059] Fourth step, adjust the air cylinder B9 to descend so that the synthetic hole B13 and the fin are at the same level;
[0060] Fifth step, put the Bundy tube A14 into the multiple individual tube protecting mechanisms B in the guiding section and position it with the front U-positioning mechanism D.
[0061] Sixth step, start the reduction motor C. Through the transmission chain, push the front U-positioning mechanism D and the tube protecting mechanism B forward. When the Bundy tube A14 is pushed to the front guiding tube protecting mechanism F through the rear precise positioning and expanding mechanism E, the air cylinder A1 starts, and pushes the hole pressing plate seat A12 to move left one by one. The pressure plate A4 opens row by row. The Bundy tube A14 is pushed into the blanking die and has an interference fit with the fin. Due to the elasticity of the fin, the Bundy tube can also penetrate through the fin under the large thrust, completing the tube expanding process of the product.
[0062] Seventh step, the reduction motor C rotates in the reverse direction, driving the rear precise positioning and expanding mechanism E to move backward and reset to the original position.
[0063] Eighth step, the right air cylinder C1 of the fin pressing device H opens the hook head pressure plate C6, the left air cylinder C14 makes the movable pressure plate C7 turn up, and the rear demolding mechanism J ejects, so that the product is separated from the blanking die, and then manual material taking can be carried out.
[0064] Step 9: Repeat the above process to automatically complete the production.
[0065] When the Bundy tube is bent during the production process, the tube protection mechanism B, the front guide tube protection mechanism F, and the fin clamping device H can be opened to remove the bad tube, and the maintenance process is greatly shortened. At the same time, the fin clamping device H adopts double cylinders for more firm compression, which can improve product quality.
[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An improved Bundy tube expansion machine, characterized in that: It includes a frame with a rectangular frame structure, a reduction motor is arranged at the lower left part of the frame, a front U positioning mechanism is arranged at the top left part of the frame, a guide section is arranged on the right side of the front U positioning mechanism, the guide section is composed of multiple separate pipe protection mechanisms fixed on the conveying chain and driven by the reduction motor; the right end of the guide section is a rear precise positioning and pushing mechanism, the right side of the rear precise positioning and pushing mechanism is a front guide pipe protection mechanism, the right side of the front guide pipe protection mechanism is a row segment, the row segment is provided with a rear row mechanism, a plurality of fin pressing devices are arranged at intervals of the row segment, a rear clamping mechanism and a rear demoulding mechanism are arranged on the lower side of the top surface of the frame; in addition, a control system is provided to control the coordinated work of various components.
2. An improved Bundy tube expansion machine according to claim 1, characterized in that: The pipe protection mechanism includes a pipe pressing mechanism, a guide plate, and a guide plate shifting mechanism; the pipe pressing mechanism includes a perforated plate seat, the perforated plate seat is provided with a plurality of evenly distributed grooves along the length direction, and a pressure plate is fixed on each partition between the grooves with a pressure plate bolt; the guide plate is divided into a front guide plate and a rear guide plate, which are respectively located on both sides of the perforated plate seat, the perforated plate seat, the front guide plate, and the rear guide plate are all arranged on a bottom plate, the front guide plate and the rear guide plate are fixedly connected to the bottom plate, and the sides are fixedly connected to a side seat respectively, a blind hole is arranged at both ends of the perforated plate seat, and a guide screw is arranged on the side seat, the front end of the guide screw is inserted into the blind hole to fix the perforated plate seat, and ensure that the perforated plate seat can move along the guide screw; A central axis is arranged in the middle of the pressure hole plate seat, and a long groove is arranged on the bottom plate below the central axis. The central axis passes through the long groove and protrudes to the lower side of the bottom plate. A roller bearing is installed at the lower end of the central axis. The guide plate shifting mechanism includes a movable left plate and a movable right plate arranged on both sides of the roller bearing. The movable left plate and the movable right plate are movably placed on the base plate, and the base plate is fixed on the frame. The movable left plate and the movable right plate are connected together with a movable shaft on the lower side of the roller bearing, and one end of the movable shaft is fixedly connected to the cylinder push rod.
3. An improved Bundy tube expansion machine according to claim 2, characterized in that: The front guide plate is provided with a plurality of evenly distributed front tapered holes, and the rear guide plate is provided with rear tapered holes concentric with the front tapered holes. The major diameters of the rear tapered holes and the front tapered holes are both toward the front end of the equipment, so as to facilitate the insertion of the Bundy tubes to be processed into the tapered holes. Both the rear tapered holes and the front tapered holes are U-shaped holes opening upward.
4. An improved Bundy tube expansion machine according to claim 2, characterized in that: When the cylinder push rod contracts, it drives the moving left plate, and the moving right plate moves to the right. The moving left plate pushes the roller bearing to move to the right, driving the middle shaft to move to the right, and the orifice plate fixedly connected to the middle shaft moves to the right, and the pressure plate thereon moves to the right, and the Bundy tubes inserted into the U-shaped holes of the front guide plate and the rear guide plate are compressed. When the cylinder push rod is pushed out, the pressure plate moves to the left, and the Bundy tubes in the U-shaped holes of the front guide plate and the rear guide plate are loosened, so that the Bundy tubes can be taken out.
5. An improved Bundy tube expansion machine according to claim 1, characterized in that: The front guide pipe protection mechanism includes a bracket, an adjustment device, and a pipe protection device; the bracket includes a rectangular base, two columns are arranged on both sides of the base, cross beams are arranged on the top surfaces of the two columns, an adjustment device, i.e., an adjustment cylinder, is fixed on the cross beam, and the pipe protection device is arranged on the two columns, and the adjustment cylinder push rod is connected to the pipe protection device.
6. An improved Bundy tube expander according to claim 5, characterized in that: The pipe protection device comprises a fixed plate mounted on the support column by two sliding sleeves, a plurality of fixed clamping plates are fixed on the lower side of the fixed plate, each fixed clamping plate is equipped with a movable clamping plate, the movable clamping plate is a U-shaped structure, the middle of the U-shaped side wall is fixed to the two side surfaces of the fixed plate by a fixing pin, and the U-shaped top end of the movable clamping plate is rotatably fixed to the two side surfaces of a pull plate by a moving pin; One end of the pull plate is connected to a connecting rod by a pin shaft, the connecting rod is connected to a perforated cylinder push rod, the perforated cylinder is fixed on the vertical plate, the vertical plate is fixed on the base, and the base is fixed on the frame.
7. An improved Bundy tube expander according to claim 5, characterized in that: The adjustment device includes an adjustment cylinder, and the adjustment cylinder push rod is connected to an N-type lifting arm. The two arms of the N-type lifting arm are rotatably fixed on both sides of the middle of the fixed plate by adjusting pins; when the hole-opening cylinder push rod is in the pushing state, the pull plate moves forward accordingly, and multiple mobile card plates fixed on the pull plate fit with the corresponding fixed card plates. When the hole-opening cylinder push rod shrinks, the mobile card plate rotates around the fixing pin, and the mobile card plate is separated from the corresponding fixed card plate; each mobile card plate is provided with a mobile card plate half hole at the lower end, and the fixed card plate matched therewith is provided with a fixed card plate half hole at the lower end. When the two are closed, a complete synthetic hole is formed, and a taper chamfer is provided at the entrance of the two semicircular holes.
8. An improved Bundy tube expander according to claim 1, characterized in that: The fin clamping device includes a platform, a flap mechanism, a hook pressure plate mechanism, and a fin clamp; the fin clamp includes a left fin clamp and a right fin clamp for clamping the fins, both of which are arranged in parallel on the platform, and two pressure plates are respectively arranged on the upper sides of the left fin clamp and the right fin clamp, and the pressure plates are fixed on the lower side of a movable pressure plate, and a flap mechanism is arranged on the left side of the movable pressure plate, and a hook pressure plate mechanism is arranged on the right side.
9. An improved Bundy tube expander according to claim 8, characterized in that: The flap mechanism includes two auxiliary plates fixed on both sides of the movable pressure plate. The two auxiliary plates are rotatably fixed to a vertical plate with a fixed left rotating shaft. The vertical plate is fixed on the platform. The lower end of the vertical plate passes through the platform. A left cylinder is fixed to the lower end of the vertical plate. The head of the left cylinder push rod is rotatably fixed to the left end of the movable pressure plate with a pin.
10. An improved Bundy tube expander according to claim 8, characterized in that: The hook pressure plate mechanism includes a fixed plate vertically fixed on the platform, and a "B"-shaped hook pressure plate is rotatably fixed on the fixed plate by a fixed right rotating shaft, the fixed right rotating shaft is located at the lower left corner of the "B" shape, and the lower right end of the "B"-shaped hook pressure plate is connected to the right cylinder push rod by a movable rotating shaft, and the lower end of the right cylinder is rotatably fixed to the lower end of the fixed plate, and the hook on the left side of the "B"-shaped hook pressure plate is pressed on the right end of the movable pressure plate.