A gear-type rolling mechanism for metal pipe non-flaring rolling forming
By designing a gear-type rolling mechanism, the chuck body is driven by the coordination of the gear shaft and the internal ring to drive the rotation of the chuck body, the radial movement of the tool head is achieved to extrude and roll the pipe, and the metal pipe has been solved without flaring rolling forming process The problem of insufficient efficiency and versatility in the medium improves the sealing and pressure resistance of aviation hydraulic pipe joints.
Patent Information
- Application Number
- CN201911302823.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-12-17
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2039-12-17
AI Technical Summary
The prior art is difficult to achieve high efficiency, versatility and simplicity of operation in the rolling forming process of metal pipes without flaring, resulting in insufficient sealing and pressure resistance of aviation hydraulic pipe joints, affecting the safety of aircraft hydraulic systems.
Design a gear-type roller mechanism including a shell, a transmission mechanism and a tool head. Through the cooperation of the gear shaft, the inner gear ring and the chuck body, the radial movement of the tool head is realized, and the rollers are driven to partially squeeze and mill the pipe. Pressure to form continuous plastic deformation.
It realizes efficient rolling forming of metal pipes without flaring, improves the sealing and pressure resistance of pipe joints, reduces the difficulty of replacement and operation, and enhances the safety of aviation hydraulic systems.
Smart Images
Figure CN110918730B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a tube internal rolling forming mechanism, in particular to a gear type rolling forming mechanism for metal tubes without expansion. Background Art
[0002] Aircraft hydraulic pipeline system plays the role of conveying oil and is the guarantee of aircraft safety. It must have the characteristics of high sealing and high pressure resistance. As the most basic hydraulic accessory, aviation hydraulic pipe joints connect hydraulic components such as hydraulic pumps, valves, cylinders, and oil tanks through pipelines to form a hydraulic system. There are many hydraulic pipe joints and they are widely distributed. Leakage of any pipe joint will cause waste of resources, environmental pollution, aircraft hydraulic system failure and even major flight accidents. Pipe joints are an important guarantee for the safe and reliable operation of the entire hydraulic system and provide a basis for the reliable circulation of oil, water and gas in the hydraulic system. Since the non-flaring pipe joint connection is detachable and maintainable, the higher the pressure within a certain hydraulic range, the better the sealing. Compared with the flaring connection, it has the advantages of high pressure resistance, light weight, good self-locking shock resistance, high sealing and long life, so it is widely used in aviation hydraulic systems. It is crucial to realize the non-flaring rolling forming process of the catheter end by designing a simple forming mechanism to form a reliable connection between the catheter and the sleeve. Summary of the invention
[0003] Aiming at the non-expansion rolling forming process of metal pipes, the present invention provides a gear-type rolling mechanism for non-expansion rolling forming of metal pipes, which has strong versatility, simple operation, high efficiency and convenient assembly and disassembly.
[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:
[0005] A gear-type rolling mechanism for non-flaring rolling forming of metal pipes, characterized in that the mechanism includes a shell, a transmission mechanism and a tool head, the transmission mechanism is installed in the shell, the tool head is installed on the shell and connected to the transmission mechanism, and the tool head is driven to move radially by the transmission mechanism.
[0006] Furthermore, the transmission mechanism comprises a chuck body, an inner gear ring, three gears, a gear shaft, and a gear support frame; the front of the chuck body is provided with a planar clockwise rectangular thread, and the center is provided with a first through hole; the inner gear ring is arranged on the back of the chuck body and is fixedly connected to the chuck body; three evenly distributed supporting step shafts are arranged around the front of the gear support frame for installing bearings, and the three gears are installed on the three evenly distributed supporting step shafts through interference fit; a second through hole is provided in the center of the gear support frame, and the gear shaft passes through the second through hole and meshes with the three gears, and the three gears mesh with the inner gear ring;
[0007] The tool head comprises four guide blocks, four rectangular support blocks, four U-shaped support blocks and four rollers. The back of the guide block is provided with multiple arc threads, and rectangular grooves are provided on both sides. The end of the guide block away from the roller is assumed to be the bottom end. The distances from the threads of the four guide blocks closest to the bottom end to the bottom end are d1, d2, d3 and d4 respectively, and d1<d2<d3<d4, and d1-d4 are an arithmetic progression with a pitch of / , so as to ensure that the front faces of the four guide blocks are on the same circumference when they are engaged with the planar clockwise rectangular threads of the chuck body through the back threads; the rectangular support block is fixed to the front face of the guide block, the U-shaped support block is fixed to the top end of the rectangular support block, and the roller is installed in the middle of the U-shaped support block;
[0008] The shell comprises a circular shell and a circular end cover; the outer end surface of the circular shell is provided with four evenly distributed T-slots, the center of the inner end surface is provided with a second stepped shaft, the stepped shaft is provided with a first blind hole for installing a bearing, and the stepped shaft is also provided with a circular annular groove; the chuck body is installed on the second stepped shaft of the circular shell through the first through hole in the center, and an elastic retaining spring is clamped in the circular annular groove for axial positioning of the chuck body; the guide block is installed in the T-slot of the circular shell through the rectangular grooves on both sides, and the chuck body is rotated clockwise so that the clockwise rectangular thread on it is engaged with the back thread of the guide block; when the four guide blocks are engaged with the plane clockwise rectangular thread of the chuck body through the back thread, their front faces are on the same circumference; one end of the gear shaft is a stepped shaft, one end of the gear shaft passes through the second through hole, the inner gear ring, and the chuck body, and is rotatably supported on the circular shell, and the other end passes through the circular end cover and is fixedly connected to the drive shaft, and the circular shell and the circular end cover are fixed together to form the shell.
[0009] Furthermore, the transmission mechanism also includes a bearing stopper, which is arranged on the supporting stepped shaft of the gear support frame, and the axial positioning of the three gears is achieved through the bearing stopper.
[0010] Furthermore, six evenly distributed first threaded holes are provided around the back of the chuck body, and six evenly distributed first threaded through holes are provided around the inner gear ring. The inner gear ring is installed on the chuck body by screwing through the first threaded through holes thereon into the first threaded holes on the back of the chuck body.
[0011] Furthermore, a tenth through hole with a larger diameter at the front end and a smaller diameter at the rear end is provided in the center of the circular end cover for mounting a rolling bearing.
[0012] The beneficial effects of the present invention are as follows:
[0013] (1) In the gear-type rolling mechanism for non-flaring rolling of metal pipes, the gear shaft of the transmission mechanism meshes with the gear, and the gear meshes with the inner gear ring to form a planetary gear mechanism. The gear shaft is small and the gear is large, which has the effect of speed reduction and labor saving when the gear shaft is used as the power transmission part.
[0014] (2) In the gear-type rolling mechanism for non-flaring rolling forming of metal tubes, the gear drives the inner gear ring to rotate by driving the gear shaft, and then drives the chuck body to rotate, so that the tool head produces radial displacement, so that the roller locally extrude and roll the thin-walled tube, causing it to produce continuous plastic deformation, and finally accumulating to form the target part.
[0015] (3) The gear-type rolling mechanism used for the non-expansion rolling forming of the metal pipe is easy to replace and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is an exploded schematic diagram of the gear-type rolling mechanism for metal pipe non-flaring rolling forming of the present invention;
[0017] Figure 2 yes Figure 1 Schematic diagram of the specific parts of the middle chuck body;
[0018] Figure 3 yes Figure 1 Schematic diagram of specific parts of the inner gear ring;
[0019] Figure 4 yes Figure 1 Schematic diagram of specific parts of the middle gear support frame;
[0020] Figure 5 yes Figure 1 Schematic diagram of specific parts of the gear;
[0021] Figure 6 yes Figure 1 Schematic diagram of specific parts of the middle bearing stopper;
[0022] Figure 7 yes Figure 1 Schematic diagram of specific parts of the middle gear shaft;
[0023] Figure 8 yes Figure 1 Schematic diagram of specific parts of the middle guide block;
[0024] Fig. 9 yes Figure 1 Schematic diagram of specific parts of the middle rectangular support block;
[0025] Fig.10 yes Figure 1 Schematic diagram of specific parts of the middle U-shaped support block;
[0026] Fig.11yes Figure 1 Schematic diagram of the specific parts of the middle roller;
[0027] Fig.12 yes Figure 1 Schematic diagram of the specific parts of the medium circular shell;
[0028] Fig.13 yes Figure 1 Schematic diagram of the specific parts of the medium circular end cover;
[0029] In the figure, the housing 11, the transmission mechanism 12, the tool head 13, the circular housing 111, the T-slot 1111, the fifth threaded hole 1112, the second stepped shaft 1113, the first blind hole 1114, the circular annular groove 1115, the circular end cover 112, the ninth through hole 1121, the tenth through hole 1122, the sixth threaded hole 1123, the seventh threaded hole 1124, the chuck body 121, the plane clockwise rectangular thread 1211, the first through hole 1212, the first threaded hole 1213, the inner gear ring 122, the first threaded through hole 1221, the gear 123, the third through hole 1231, the gear shaft 124, the A stepped shaft 1241, a first keyway 1242, a gear support frame 125, a supporting stepped shaft 1251, a second threaded hole 1252, a second threaded through hole 1253, a second through hole 1254, a bearing stopper 126, a fourth through hole 1261, a guide block 131, a thread 1311, a third threaded hole 1312, a rectangular groove 1313, a rectangular support block 132, a fifth through hole 1321, a rectangular groove 1322, a fourth threaded hole 1323, a U-shaped support block 133, a sixth through hole 1331, a seventh through hole 1332, a roller 134, an eighth through hole 1341, and a cylindrical head bolt 135. DETAILED DESCRIPTION
[0030] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become more clear. The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0031] like Figure 1-13As shown, a gear-type rolling mechanism for non-flaring rolling forming of metal pipes of the present invention comprises a housing 11, a transmission mechanism 12, and a tool head 13. The transmission mechanism 12 comprises a chuck body 121, an inner gear ring 122, three gears 123, a gear shaft 124, a gear support frame 125, and a bearing stopper 126. The front of the chuck body 121 is provided with a planar clockwise rectangular thread 1211, a first through hole 1212 is provided in the center, and six first threaded holes 1213 are evenly distributed around the back; six first threaded through holes 1221 are evenly distributed around the inner gear ring 122, and the inner gear ring 122 is screwed into the first threaded hole 1213 on the back of the chuck body 121 by passing a screw through the first threaded through hole 1221 thereon to be installed on the chuck body 121. The front of the gear support frame 125 is provided with three evenly distributed support stepped shafts 1251 for mounting bearings, the shaft end is provided with a second threaded hole 1252, the end surface is provided with three evenly distributed second threaded through holes 1253, and the center is provided with a second through hole 1254; the center of the gear 123 is provided with a third through hole 1231, and the center of the bearing stopper 126 is provided with a fourth through hole 1261. The gear 123 is interference-mounted on the support stepped shaft 1251 with bearings of the gear support frame 125 through the third through hole 1231 in the center, and the bearing stopper 126 is installed on the end of the support stepped shaft 1251 of the gear support frame 125 for axial positioning of the gear 123. The bearing stopper 126 is fixed by screws passing through the fourth through hole 1261 in the center and screwed into the second threaded hole 1252 on the gear support frame 125. One end of the gear shaft 124 is provided with a first stepped shaft 1241, and the stepped shaft is provided with a first keyway 1242.
[0032] The tool head 13 includes four guide blocks 131 , four rectangular support blocks 132 , four U-shaped support blocks 133 , four rollers 134 and four cylindrical head bolts 135 . The guide block 131 is provided with a thread 1311 on the back, two third threaded holes 1312 on the front, and rectangular grooves 1313 on both sides. The end of the guide block 131 away from the roller 134 is assumed to be the bottom end. The distances from the threads of the four guide blocks 131 closest to the bottom end to the bottom end are d1, d2, d3, and d4, respectively, and d1 < d2 < d3 < d4, and d1-d4 are an arithmetic progression with an arithmetic difference of 1 / 4 pitch, so as to ensure that the front sides of the four guide blocks 131 are on the same circumference when they are engaged with the planar clockwise rectangular thread 1211 of the chuck body 121 through the back thread 1311; the rectangular support block 132 is provided with two fifth through holes 1321, a rectangular groove 1322 on the top, and a fourth threaded hole 1323 at the bottom of the rectangular groove. The rectangular support block 132 is screwed into the third threaded hole 1312 on the guide block 131 through the fifth through hole 1321 thereon by screws, and is fixedly connected to the guide block 131. The U-shaped support block 133 is provided with sixth through holes 1331 on both sides, and a seventh through hole 1332 is provided at the bottom; the U-shaped support block 133 is screwed into the fourth threaded hole 1323 on the rectangular support block 132 through the seventh through hole 1332 thereon by screws, and is fixedly connected to the rectangular support block 132. The center of the roller 134 is provided with an eighth through hole 1341, and the roller 134 is installed on the U-shaped support block 133 by the cylindrical head bolt 135 passing through the eighth through hole 1341 thereon and the sixth through hole 1331 of the U-shaped support block 133, and a nut is screwed on the other end of the cylindrical head bolt 135 to install it on the U-shaped support block 133.
[0033] The housing 11 comprises a circular housing 111 and a circular end cover 112. The outer end surface of the circular housing 111 is provided with four evenly distributed T-shaped slots 1111, the inner end surface is provided with six fifth threaded holes 1112 around, the center of the inner end surface is provided with a second stepped shaft 1113, the stepped shaft is provided with a first blind hole 1114 for mounting a bearing, and the stepped shaft is also provided with a circular annular groove 1115. The chuck body 121 is installed on the second stepped shaft 1113 of the circular housing 111 through the first through hole 1212 in the center, and an elastic retaining spring is inserted into the circular annular groove 1115 for axial positioning of the chuck body 121; the guide block 131 is installed in the T-slot 1111 of the circular housing 111 through the rectangular grooves 1313 on both sides, and the chuck body 121 is rotated clockwise to make the clockwise rectangular thread 1211 on it engage with the back thread 1311 of the guide block 131. When installing the guide block 131, first install the guide block with the smallest distance from the bottom thread to the lower end, and then install the remaining three guide blocks 131 in order from small to large distance from the bottom thread to the lower end. The circular end cover 112 is provided with six evenly distributed ninth through holes 1121 around the end surface, and a tenth through hole 1122 with a large diameter at the front section and a small diameter at the rear end is provided in the center for installing a rolling bearing, three sixth threaded holes 1123 are provided around the center of the front side, and six seventh threaded holes 1124 are provided around the center of the back side. The gear support frame 125 is screwed into the sixth threaded hole 1123 on the front of the circular end cover 112 by passing a screw through the second threaded through hole 1253 thereon so as to be installed on the circular end cover 112; the gear shaft 124 is provided with a second through hole 1254 at the center of the gear support frame 125 at one end of the stepped shaft 1241, which is inserted into the tenth through hole 1122 with a bearing at the center of the circular end cover 112, and the gear thereon is meshed with the gear 123; the circular end cover 112 is screwed into the fifth threaded hole 1112 of the circular housing 111 by passing a screw through the ninth through hole 1121 thereon, and is connected to the circular housing 111, and the other end of the gear shaft 124 installed thereon is installed in the first blind hole 1114 with a bearing on the circular housing 111, and the gear 123 installed thereon is meshed with the inner gear ring 122 installed on the circular housing 111.
[0034] During installation, firstly, the screw is passed through the first threaded through hole 1221 on the inner gear ring 122, and screwed into the first threaded hole 1213 on the back of the chuck body 121 to fix the inner gear ring 122 on the chuck body 121. Then, the chuck body 121 is installed on the second stepped shaft 1113 of the circular housing 111 through the first through hole 1212 in the center, and an elastic retaining ring is inserted into the circular annular groove 1115 for axial positioning of the chuck body 121. Then, the screw is passed through the fifth through hole 1321 on the rectangular support block 132, and screwed into the third threaded hole 1312 on the guide block 131 to fix the rectangular support block 132 with the guide block 131, and then the screw is passed through the seventh through hole 1332 on the U-shaped support block 133, and screwed into the fourth threaded hole 1323 on the rectangular support block 132 to fix the U-shaped support block 133 with the rectangular support block 132. Then, the roller 134 is passed through the eighth through hole 1341 on the cylindrical head bolt 135 and the sixth through hole 1331 of the U-shaped support block 133, and a nut is screwed on the other end of the cylindrical head bolt 135 to install the roller 134 on the U-shaped support block 133. Then, the guide block 131 with a distance of d1 is installed into the T-slot 1111 of the circular housing 111 through the rectangular grooves 1313 on both sides, and the chuck body 121 is rotated clockwise so that the clockwise rectangular thread 1211 on it is engaged with the back thread 1311 of the guide block 131, and then the remaining three guide blocks 131 are installed clockwise in the order of distances d2, d3, and d4 from small to large. Then, three bearings are installed on the three supporting stepped shafts 1251 on the gear support frame 125, and then the three gears 123 are respectively installed on the three bearings through the third central through holes 1231, and then screws are passed through the fourth through holes 1261 in the center of the three bearing blocks 126, and screwed into the second threaded holes 1252 on the gear support frame 125 respectively to install the three bearing blocks 126 on the ends of the three supporting stepped shafts 1251 of the gear support frame 125. Then, screws are passed through the second threaded through holes 1253 on the gear support frame 125, and screwed into the sixth threaded holes 1123 on the front of the circular end cover 112 to install the gear support frame 125 on the circular end cover 112, and then the bearings are installed in the tenth through holes 1122 of the circular end cover 112, and then the end of the gear shaft 124 provided with the stepped shaft 1241 is passed through the second through hole 1254 in the center of the gear support frame 125 and installed in the bearings, and the gears thereon are meshed with the three gears 123. Finally, pass the screw through the ninth through hole 1121 on the circular end cover 112 and screw it into the fifth threaded hole 1112 of the circular shell 111 to fix the circular end cover 112 to the circular shell 111, and the other end of the gear shaft 124 installed on the circular end cover 112 is inserted into the first blind hole 1114 with a bearing on the circular shell 111, and the three gears 123 installed on the gear support frame 125 are meshed with the inner gear ring 122 installed on the chuck body 121.
[0035] When in use, the metal pipe is supported internally by an iron core and clamped on the three-jaw chuck of the lathe. After the rolling forming mechanism is clamped and fixed, it is extended into the pipe to reach the desired bulging position, and then the lathe is started to rotate the pipe at high speed, and the gear shaft 124 is driven to rotate. The inner ring gear 122 is driven to rotate through the gear 123, and then the chuck body 121 is driven to rotate, causing the tool head 13 to produce radial displacement, thereby locally extruding and rolling the thin-walled tube, causing it to produce continuous plastic deformation, and finally accumulating to form the target part.
[0036] Those skilled in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention.
Claims
1. A gear-type rolling mechanism for rolling metal pipes without flaring, characterized in that: The mechanism comprises a housing (11), a transmission mechanism (12) and a tool head (13); the transmission mechanism (12) is installed in the housing (11); the tool head (13) is installed on the housing (11) and is connected to the transmission mechanism (12); the tool head (13) is driven by the transmission mechanism (12) to move radially; The transmission mechanism (12) comprises a chuck body (121), an inner gear ring (122), three gears (123), a gear shaft (124), and a gear support frame (125); the front face of the chuck body (121) is provided with a planar clockwise rectangular thread (1211), and the center is provided with a first through hole (1212); the inner gear ring (122) is arranged on the back face of the chuck body (121) and is fixedly connected to the chuck body (121); the gear support frame (125) is provided with a first through hole (1212) at the center; Three evenly distributed supporting stepped shafts (1251) are arranged around the surface for mounting bearings, the three gears (123) are mounted on the three evenly distributed supporting stepped shafts (1251) by interference fit, a second through hole (1254) is arranged at the center of the gear support frame (125), the gear shaft (124) passes through the second through hole (1254) and meshes with the three gears (123), and the three gears (123) mesh with the inner gear ring (122); The tool head (13) comprises four guide blocks (131), four rectangular support blocks (132), four U-shaped support blocks (133), and four rollers (134). The guide block (131) is provided with a plurality of back threads (1311) on its back, and rectangular grooves (1313) are provided on both sides. The end of the guide block (131) away from the roller (134) is defined as the bottom end. The distances from the threads of the four guide blocks (131) closest to the bottom end to the bottom end are d1, d2, d3, and d4, respectively, and d1 < d2 < d3. <d4, d1-d4 is an arithmetic progression with an arithmetic progression of 1 / 4 pitch, so as to ensure that the front faces of the four guide blocks (131) are on the same circumference when the back threads (1311) are engaged with the planar clockwise rectangular threads (1211) of the chuck body (121); the rectangular support block (132) is fixed to the front face of the guide block (131), the U-shaped support block (133) is fixed to the top end of the rectangular support block (132), and the roller (134) is installed in the middle of the U-shaped support block (133); The housing (11) comprises a circular housing (111) and a circular end cover (112); the outer end surface of the circular housing (111) is provided with four evenly distributed T-shaped grooves (1111), the center of the inner end surface is provided with a second stepped shaft (1113), the stepped shaft is provided with a first blind hole (1114) for mounting a bearing, and the stepped shaft is also provided with a circular annular groove (1115); the chuck body (121) is installed on the second stepped shaft (1113) of the circular housing (111) through the first through hole (1212) in the center, and an elastic retaining spring is clamped in the circular annular groove (1115) for axial positioning of the chuck body (121); the guide block (131) is installed in the T-shaped groove (1111) of the circular housing (111) through the rectangular grooves (1313) on both sides, and is arranged in a straight line. The chuck body (121) is rotated clockwise so that the clockwise rectangular thread (1211) on it meshes with the back thread (1311) of the guide block (131); when the four guide blocks (131) mesh with the planar clockwise rectangular thread (1211) of the chuck body (121) through the back thread (1311), their front faces are on the same circumference; one end of the gear shaft (124) is a stepped shaft; one end of the gear shaft (124) passes through the second through hole (1254), the inner gear ring (122), and the chuck body (121), and is rotatably supported on the circular housing (111); the other end passes through the circular end cover (112); the circular housing (111) and the circular end cover (112) are fixed together to form the housing (11); The transmission mechanism (12) further comprises a bearing stopper (126) which is arranged on the supporting stepped shaft (1251) of the gear support frame (125), and the axial positioning of the three gears (123) is achieved through the bearing stopper (126); The back side of the chuck body (121) is provided with six evenly distributed first threaded holes (1213) around the periphery, and the inner gear ring (122) is provided with six evenly distributed first threaded through holes (1221) around the periphery. The inner gear ring (122) is installed on the chuck body (121) by screws passing through the first threaded through holes (1221) thereon and screwed into the first threaded holes (1213) on the back side of the chuck body (121).
2. The gear-type rolling mechanism for metal pipe non-flaring rolling forming according to claim 1, characterized in that: A tenth through hole (1122) having a larger front diameter and a smaller rear diameter is provided at the center of the circular end cover (112) for mounting a rolling bearing.