CN113333845A - Flexible force cutting device for large-diameter thin-wall part - Google Patents
Flexible force cutting device for large-diameter thin-wall part Download PDFInfo
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- CN113333845A CN113333845A CN202110505608.XA CN202110505608A CN113333845A CN 113333845 A CN113333845 A CN 113333845A CN 202110505608 A CN202110505608 A CN 202110505608A CN 113333845 A CN113333845 A CN 113333845A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D19/00—Shearing machines or shearing devices cutting by rotary discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/02—Arrangements for holding, guiding, and/or feeding work during the operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a flexible power cutting device of heavy-calibre thin wall part belongs to machining technical field, solves the undulant problem of thin wall spare cutting force, reduces duplication time such as clamping work piece with continuous cutting mode simultaneously, is applicable to big batch processing, has improved productivity ratio in the very big degree, satisfies the production requirement, and this cutting device includes: the cutting device comprises a left supporting unit, a cutting adjusting unit, a right supporting unit and a bottom plate; the left supporting unit, the cutting adjusting unit and the right supporting unit are sequentially arranged on the bottom plate; the left supporting unit and the right supporting unit support and limit the large-caliber thin-wall part, and the large-caliber thin-wall part is cut through the cutting adjusting unit. The double-spring pre-tightening floating support device is used for controlling the opening angle of the support frame, so that the hard contact force on the surface of a thin-wall part is reduced, the flexible low-deformation clamping of a workpiece is realized, the cutting deformation is reduced, and the machining precision is improved; the cutting speed can be flexibly controlled, the consistency of the cutting end face is greatly improved, the quality of the section is improved, and great convenience is provided for assembly.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a flexible force cutting device for a large-caliber thin-wall part.
Background
The large-caliber thin-wall parts are widely applied to various major projects, such as high-pressure air exhaust and drainage, sectional wiring, pipe running and the like, but the parts have the characteristics of thin wall, large caliber, large mass and the like, so that the parts are poor in structural strength and easy to deform, and the processing difficulty of the parts is increased. The existing cutting modes aiming at thin-wall parts with different calibers mainly comprise laser cutting, water cutting, flame cutting and the like, and although the cutting modes are widely applied in different places, the cutting modes also have some defects, such as the laser cutting is limited by the power of a laser, the requirements on the thickness of materials are met, and the laser cutting equipment is expensive, high in operation requirements and dangerous to some extent; the large water cutting equipment has large volume, is inconvenient to carry and operate in the actual construction process, and has low automation degree when processing large-caliber thin-wall parts; flame cutting is easily affected by a plurality of factors, the technical requirements on the cut materials and operators are high, the cut pipe fittings are large in deformation and poor in quality, and inconvenience is brought to subsequent use. Therefore, mechanical cutting is still a relatively common thin-walled tube cutting method. The main problems of the existing mechanical cutting mode are that the local stress of the thin wall caused by large fluctuation cutting force is uneven, the port quality is poor, the adaptability of the processing device is poor, the automation degree is low and the like, so that the use efficiency of the thin-wall cutting piece is greatly reduced, and the work burden of an operator is increased. Therefore, an automatic device for cutting the large-caliber thin-wall part, which can improve the quality of the cut end face of the thin-wall part, reduce the labor load of operators and meet the environment requirement of a complex construction site, is urgently needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a flexible force cutting device for a large-diameter thin-wall part, which solves the problem of fluctuation of cutting force of the thin-wall part, reduces the copying time of clamping workpieces and the like in a continuous cutting mode, is suitable for large-batch processing, greatly improves the production efficiency and meets the production requirement.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a flexible force cutting device for large-caliber thin-wall parts comprises: the cutting device comprises a left supporting unit, a cutting adjusting unit, a right supporting unit and a bottom plate; the left supporting unit, the cutting adjusting unit and the right supporting unit are sequentially arranged on the bottom plate; the left supporting unit and the right supporting unit support and limit the large-caliber thin-wall part, and the large-caliber thin-wall part is cut through the cutting adjusting unit.
Preferably, the left support unit and the right support unit have the same structure.
Preferably, the left supporting unit comprises a hand wheel, a first supporting assembly, a second supporting assembly, a lead screw supporting seat, a lead screw nut seat, a sliding rail and a supporting seat; one end of the lead screw is connected with the hand wheel, penetrates through the lead screw supporting seat and the lead screw nut seat, and the other end of the lead screw is assembled on the supporting seat; the first supporting assembly is arranged on the supporting seat through the lead screw supporting seat; the slide rail is positioned below the screw rod, one end of the slide rail is arranged on the screw rod supporting seat and penetrates through the screw rod nut seat, and the other end of the slide rail is arranged on the supporting seat; and a hand wheel is shaken, and the lead screw nut seat drives the second support component to adjust the distance between the second support component and the first support component.
Preferably, the first support assembly comprises: four rollers, two rolling shafts and a rolling seat; the rolling shafts penetrate through the rolling seats, and two ends of each rolling shaft are provided with a roller; the roller is rotatable.
Preferably, the second support assembly comprises: the four rollers, the two rolling shafts, the rolling seat, the two hinges and the rotating shaft are arranged on the base; the rolling shafts penetrate through the rolling seats, and two ends of each rolling shaft are provided with a roller; the roller can rotate; two hinges are arranged below the rolling seat, and the second supporting component is assembled with the screw nut seat through a rotating shaft to realize the pitching posture and rotation of the second supporting component.
Preferably, the cutting adjustment unit includes: the device comprises an adjusting component, a fine adjustment bracket, a cutting component, a conveying component, a motor and a transmission box seat; the adjusting assembly, the fine adjustment bracket and the conveying assembly are arranged on the transmission box seat; the fine adjustment bracket is movably matched with the transmission box seat; the transmission case seat and the motor are arranged on the bottom plate; the adjusting component adjusts an included angle between the fine adjustment support and the bottom plate; the cutting assembly is arranged on the fine adjustment support and is used for cutting the large-caliber thin-wall part; the motor is connected with the conveying assembly, and the rotating speed of the cutting assembly and the rotation of the large-caliber thin-wall part are controlled through the conveying assembly.
Preferably, the adjustment assembly comprises: the fine adjustment nut is arranged on the transmission box seat, the upright post is arranged on the transmission box seat, the fine adjustment screw rod penetrates through the upright post, and the support ball is arranged in the direction close to the fine pendulum support and at one end of the fine adjustment screw rod; an included angle is generated between the transmission box seat and the bottom plate by rotating the fine adjustment nut, and the large-caliber thin-wall pipe fitting is adjusted to be in a horizontal state; through rotating the fine adjustment screw rod, the supporting balls support the micro-pendulum support, and an included angle between the transmission case seat and the micro-pendulum support is changed.
Preferably, the cutting assembly comprises: the four supporting wheels, the four supporting frames, the supporting shaft, the four tension springs, the cutter shaft and the cutter are arranged; the supporting shaft is arranged on the fine adjustment support, two supporting frames are arranged at two ends of the supporting shaft respectively, and the four supporting frames and the supporting shaft move in a matched mode; the support wheel is arranged at one end of the support frame, the other end of the support frame is fixed with a tension spring, and two tension springs at the same side are connected together and fixed at one side of the fine adjustment support; a cutter shaft is fixed in the supporting shaft, and the cutter is installed on the cutter shaft and located at the outer ends of the two supporting frames on the same side.
Preferably, the transfer assembly comprises: the belt pulley group, the input shaft, the first transmission shaft, the second transmission shaft, the third transmission shaft, the fourth transmission shaft, the fifth transmission shaft, the sixth transmission shaft, the seventh transmission shaft, the eighth transmission shaft, gears and rolling pulley groups are sleeved on each transmission shaft and are different in size; the output end of the motor is connected with one side of the belt pulley group, the other side of the motor is connected with the input shaft, a gear on the input shaft is respectively meshed with a gear on the first transmission shaft and a gear on the fifth transmission shaft, the gear on the first transmission shaft is meshed with a gear on the second rotating shaft, the gear on the second transmission shaft is meshed with a gear on the third transmission shaft, and two wheels of the rolling pulley group are arranged at two ends of the third transmission shaft and positioned outside the transmission case; the gear on the fifth transmission shaft is meshed with the gear on the sixth transmission shaft, the gear on the sixth transmission shaft is meshed with the gear on the seventh transmission shaft, the seventh transmission shaft is provided with a belt wheel, and the belt wheel on the cutter shaft are provided with a transmission belt to drive the cutter to rotate and cut; the gear on the seventh transmission shaft is meshed with the gear on the eighth transmission shaft, and two wheels of the rolling wheel set are arranged at two ends of the eighth transmission shaft and positioned outside the transmission case; the rotating speeds of the rolling wheel on the third transmission shaft and the rolling wheel on the eighth transmission shaft are different; the motor transmits kinetic energy to the first transmission shaft, the second transmission shaft, the third transmission shaft, the fourth transmission shaft, the fifth transmission shaft, the sixth transmission shaft, the seventh transmission shaft and the eighth transmission shaft through the belt pulley group, the belt pulley group and the input shaft, the motor is sleeved on each transmission shaft, and gears and rolling wheel groups with different sizes enable the large-caliber thin-wall parts arranged on the wheels to rotate and drive the cutter to rotate to cut the large-caliber thin-wall parts.
Preferably, two threshold values, namely a first threshold value and a second threshold value, are preset for the winding current of the motor, and the first threshold value is greater than the second threshold value; when the cutter is used for processing a large-caliber thin-wall pipe fitting, the motor bears load; in a stable cutting state, the motor maintains the winding current running between a first threshold value and a second threshold value; when the rotating speed of the motor is gradually increased, the micro-pendulum support is subjected to inertia and friction force of the synchronous belt and the synchronous belt wheel, the inclination angle of the micro-pendulum support is increased, the cutting depth of the cutter for the large-caliber thin-wall pipe fitting is increased, and the load borne by the motor is increased; when the load torque is too large and exceeds the rated torque of the motor, the winding current can be continuously increased; when the winding current exceeds a first threshold value, the rotating speed of the motor is gradually reduced, the inclination angle of the micro-pendulum support is reduced, the fine tuning support is lowered, the cutter is far away from the large-caliber thin-wall pipe fitting, the cutting depth is reduced, the resistance of the cutter is reduced, the load borne by the motor is reduced, and the winding current is reduced; when the winding current is lower than a second threshold value, the rotating speed of the motor is gradually increased, the micro-pendulum support is subjected to inertia and the friction force of the synchronous belt and the synchronous belt wheel again, the inclination angle is increased, and the cutting depth of the cutter for the large-caliber thin-wall pipe fitting is increased for secondary circulation.
The invention has the beneficial effects that:
1. the double-spring pre-tightening floating support device is used for controlling the opening angle of the support frame, so that the hard contact force on the surface of a thin-wall part is reduced, the flexible low-deformation clamping of a workpiece is realized, the cutting deformation is reduced, and the machining precision is improved;
2. on the premise that the range of the swing angle of the micro-swing support is limited, the motor can regulate and control the rotating speed according to current feedback, and further friction force control is realized; self-adjustment of the micro-pendulum support in a cuttable area can be realized by utilizing the friction force of the transmission belt and the belt wheel, and the stability of cutting force is greatly improved.
3. The workpiece is supported and autorotated by the double pairs of supporting wheels which are in the same direction and have speed difference, so that the cutting speed can be flexibly controlled, the consistency of the cutting end face is greatly improved, the quality of the section is improved, and great convenience is provided for subsequent assembly.
4. The device can realize modularized disassembly and assembly, has strong adaptability to complex severe environments, has low requirement on operators, and greatly reduces the burden of the operators.
Drawings
FIG. 1 is a schematic diagram of the flexible force cutting device for large-caliber thin-wall parts.
FIG. 2 is a schematic structural diagram of a flexible force cutting device for large-caliber thin-wall parts.
FIG. 3 is a structural side view of the flexible force cutting device for the large-caliber thin-wall part.
FIG. 4 is a schematic diagram of a structural transmission assembly of the flexible force cutting device for large-caliber thin-wall parts according to the present invention.
FIG. 5 is a schematic diagram of a first belt wheel and a second belt wheel of a structural transmission assembly of the flexible force cutting device for the large-caliber thin-wall parts.
In the figure: 1. the large-caliber thin-wall pipe fitting comprises, by weight, 2 parts of a large-caliber thin-wall pipe fitting, 2 parts of a right side support, 3 parts of a bottom plate, 4 parts of a cutting adjusting unit, 4-1 part of a third support wheel set, 4-2 parts of an upright post, 4-3 parts of a tension spring set, 4-4 parts of a motor, 4-5 parts of a belt set, 4-6 parts of a belt wheel set, 4-7 parts of an upper cover, 4-8 parts of a cutter shaft, 4-9 parts of a cutter, 4-10 parts of a support shaft, 4-11 parts of a first support frame, 4-12 parts of a micro-swing support frame, 4-13 parts of a bearing ball, 4-14 parts of an adjusting screw rod, 4-15 parts of a fine adjusting nut, 4-16 parts of a base, 4-17 parts of a transmission case, 4-18 parts of a synchronous belt, 4-19 parts of a seventh transmission shaft end cover, 4-20 parts of a fifth transmission shaft end cover, 4-21 parts of an input shaft end cover, 4-22 parts of a seventh transmission shaft end cover, 4-23 parts of a first transmission shaft end cover, 4-24 parts of a fourth transmission shaft end cover, 4-24 parts of a second support frame, 4-25 parts of a rolling wheel set, 4-26 parts of a fifth transmission shaft, 4-27 parts of a seventh transmission shaft, 4-28 parts of a sixth transmission shaft, 4-29 parts of a fourth transmission shaft, 4-30 parts of a fifth transmission shaft, 4-31 parts of an input shaft, 4-32 parts of a first transmission shaft, 4-33 parts of the second transmission shaft, 4-34 parts of the third transmission shaft, 4-35 parts of the first transmission shaft, 4-36 parts of a first belt wheel, 5-1 parts of a second belt wheel, 5 parts of a left support, 5-1 parts of a hand wheel, 5-2 parts of a first support wheel set, 5-3 parts of a first support wheel shaft, 5-4 parts of a first support wheel seat, 5-5 parts of a screw support seat, 5-6 parts of a screw rod, 5-7 parts of a support base, 5-8 parts of slide rail, 5-9 parts of first hinge, 5-10 parts of second hinge, 5-11 parts of rotating shaft, 5-12 parts of lead screw and nut seat
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a flexible force cutting device for large-caliber thin-wall parts comprises: a left supporting unit 5, a cutting adjusting unit 4, a bottom plate 3 and a right supporting unit 2; the left supporting unit 5, the cutting adjusting unit 4 and the right supporting unit 2 are sequentially arranged on the bottom plate 3; the left supporting unit 5 and the right supporting unit 2 are identical in structure and support and limit the large-caliber thin-wall pipe fitting 1, so that the large-caliber thin-wall pipe fitting 1 is in a balanced state, the central axis of the large-caliber thin-wall pipe fitting is parallel to the bottom plate 3, and the cutting adjusting unit 4 can better cut the large-caliber thin-wall part 1.
As shown in fig. 2, the left supporting unit 5 includes: the device comprises a hand wheel 5-1, a first supporting component, a second supporting wheel set, a screw 5-6, a screw supporting seat 5-5, a screw nut seat 5-12, a sliding rail 5-8 and a supporting base 5-7; the first support assembly includes: a first support wheel set 5-2, two first support wheel axles 5-3 and a first support wheel seat 5-4, the second support assembly comprising: a second supporting wheel set, two second supporting wheel shafts, a second supporting wheel seat, a first hinge 5-9, a second hinge 5-10 and a rotating shaft 5-11. The first support wheel set 5-2 and the second support wheel set each comprise: four rollers. In the first support assembly, two first support shafts 5-3 penetrate through the first support rolling seats 5-4, and two ends of each first support shaft 5-3 are provided with a roller; the roller is rotatable. Similarly, in the second supporting assembly, two second supporting shafts penetrate through the second supporting rolling seats, two ends of each second supporting shaft are provided with a roller, and a first hinge 5-9 and a second hinge 5-10 are arranged below the second supporting rolling seats; the first hinge 5-9 and the second hinge 5-10 are fixed on the rotating shaft 5-11, and are assembled with the screw and nut seat 5-12 through the rotating shaft 5-11, and the roller can rotate. One end of the lead screw 5-6 is connected with a hand wheel 5-1, penetrates through the lead screw supporting seat 5-5 and the lead screw nut seat 5-12, and the other end is assembled on the supporting base 5-7; the first supporting component is arranged on the supporting base 5-7 through the lead screw supporting seat 5-5; the slide rail 5-8 is positioned below the screw 5-6, one end of the slide rail is arranged on the screw support seat 5-5 and penetrates through the screw nut seat 5-12, and the other end of the slide rail is arranged on the support base 5-7; the supporting base 5-7 is of an L-shaped structure, the screw rod supporting base 5-5 is arranged on the horizontal part of the supporting base 5-7, and the screw rod 5-6 and the sliding rail 5-8 are arranged on the vertical part of the supporting base 5-7. And (3) shaking the hand wheel 5-1, wherein the lead screw nut seat 5-12 drives the second support assembly to move along the lead screw 5-6 and the slide rail 5-8, and adjusting the distance between the second support assembly and the first support assembly.
As shown in fig. 2 and 3, the cutting adjustment unit 4 includes: the device comprises an adjusting component, a fine adjustment bracket 4-12, a cutting component, a conveying component, a motor 4-4 and a transmission case 4-17; the adjusting assembly, the fine adjustment bracket 4-12 and the conveying assembly are arranged on the transmission case 4-17; the fine adjustment bracket 4-12 is movably matched with the transmission case 4-17; the transmission case 4-17 and the motor 4-4 are arranged on the base 4-16; the adjusting component adjusts an included angle between the fine adjustment support 4-12 and the base 4-16; the cutting assembly is arranged on the fine adjustment support 4-12 and is used for cutting the large-caliber thin-wall pipe fitting 1; the motors 4-4 are connected with the conveying assembly, and the rotating speed of the cutting assembly and the rotation of the large-caliber thin-wall pipe fitting 1 are controlled through the conveying assembly.
Wherein the adjustment assembly comprises: fine adjustment nuts 4-15 arranged on the transmission box seats 4-19, an upright post 4-2 arranged on the transmission box 4-17, an adjusting screw rod 4-14 penetrating through the upright post 4-2 and a support ball 4-13 arranged in the direction close to the micro-pendulum support 4-12 and at one end of the adjusting screw rod 4-14; by rotating the fine adjustment nuts 4-15, included angles are generated between the transmission box bases 4-19 and the bases 4-16, included angles between the micro-pendulum supports 4-12 and the bases 4-16 are changed, and the large-caliber thin-wall pipe fitting 1 is adjusted to be in a horizontal state. And the supporting balls 4-13 support the micro-pendulum supports 4-12 by rotating the adjusting screws 4-14, and the included angle between the fine adjustment support 4-12 and the base 4-16 is changed.
The cutting assembly includes: a third supporting wheel set 4-1, four supporting frames, a supporting shaft 4-10, a tension spring set 4-3, a cutter shaft 4-8 and a cutter 4-9; in the embodiment, the tension spring set 4-3 comprises four tension springs, the third support wheel set 4-1 comprises four support wheels, the support shafts 4-10 are mounted on the fine adjustment supports 4-12, and two support frames are respectively arranged at two ends of each support shaft; as shown in fig. 3, a first support frame 4-11 and a second support frame 4-24 are arranged at one end of the support shaft 4-10, two support wheels are arranged at one end of the first support frame 4-11 and the second support frame 4-24, a tension spring is fixed at the other end of each of the first support frame 4-11 and the second support frame 4-24, the two tension springs are connected together and fixed on the micro-pendulum supports 4-12, the four support frames and the support shaft 4-10 move in a matching manner, a cutter shaft 4-8 is fixed in the support shaft 4-10, and the cutter 4-9 is installed on the cutter shaft 4-8 and located at one end of the two support frames at the same side.
Preferably, the transfer assembly comprises: 4-5 parts of belt sets, 4-6 parts of belt pulley sets, 4-31 parts of input shafts, 4-32 parts of first transmission shafts, 4-33 parts of second transmission shafts, 4-34 parts of third transmission shafts, 4-29 parts of fourth transmission shafts, 4-30 parts of fifth transmission shafts, 4-28 parts of sixth transmission shafts, 4-27 parts of seventh transmission shafts, 4-26 parts of eighth transmission shafts, and 4-25 parts of gears and rolling wheel sets which are sleeved on each transmission shaft and have different sizes; the input shaft 4-31, the first transmission shaft 4-32, the second transmission shaft 4-33, the third transmission shaft 4-34, the fourth transmission shaft 4-29, the fifth transmission shaft 4-30, the sixth transmission shaft 4-28, the seventh transmission shaft 4-27 and the eighth transmission shaft 4-26 are all arranged on the transmission case 4-17 and are fixed through transmission shaft end covers; as shown in fig. 3, the input shaft 4-31 is fixed through an input shaft end cover 4-22, the first transmission shaft 4-32 is fixed through a first transmission shaft end cover 4-23, the fourth transmission shaft 4-29 is fixed through a fourth transmission shaft end cover 4-24, the fifth transmission shaft 4-30 is fixed through a fifth transmission shaft end cover 4-21, and the seventh transmission shaft 4-27 is fixed through a seventh transmission shaft end cover 4-24; the belt set 4-5 is sleeved on the belt pulley set 4-6, the output end of the motor 4-4 is connected with one side of the belt pulley set 4-6, the other side of the belt pulley set 4-6 is connected with the input shaft 4-31, the gears on the input shaft 4-31 are respectively meshed with the gears on the first transmission shaft 4-32 and the fifth transmission shaft 4-30, the gears on the first transmission shaft 4-32 are meshed with the gears on the second rotation shaft 4-33, the gears on the second transmission shaft 4-33 are meshed with the gears on the fourth transmission shaft 4-29, the gears on the fourth transmission shaft 4-29 are meshed with the gears on the third transmission shaft 4-34, and the third transmission shaft 4-34 passes through the transmission case 4-17, two wheels of the rolling wheel group are arranged at two ends of the frame; the gears on the fifth transmission shafts 4-30 are meshed with the gears on the sixth transmission shafts 4-28, the gears on the sixth transmission shafts 4-28 are meshed with the gears on the seventh transmission shafts 4-27, as shown in fig. 5, the seventh transmission shafts 4-27 are provided with first belt pulleys 4-35, and a transmission belt 4-18 is arranged between the seventh transmission shafts 4-27 and second belt pulleys 4-36 on the cutter shafts 4-8 to drive the cutters 4-9 to rotate for cutting; the gears on the seventh transmission shafts 4-27 are meshed with the gears on the eighth transmission shafts 4-26, the eighth transmission shafts 4-26 penetrate through the transmission boxes 4-17, and two wheels of the rolling wheel set are arranged at two ends of each transmission box; the rotating speeds of the rolling wheels on the third transmission shafts 4-34 and the rolling wheels on the eighth transmission shafts 4-26 are different, so that the large-caliber thin-wall pipe fitting 1 can realize autorotation motion; the motor 4-4 transmits kinetic energy to the first transmission shaft 4-32, the second transmission shaft 4-33, the third transmission shaft 4-34, the fourth transmission shaft 4-29, the fifth transmission shaft 4-30, the sixth transmission shaft 4-28, the seventh transmission shaft 4-27 and the eighth transmission shaft 4-26 through the belt pulley group 4-6, the belt pulley group 4-5 and the input shaft 4-31, and the gears and the rolling pulley groups 4-25 which are different in size and rotation direction are sleeved on each transmission shaft, so that the large-caliber thin-walled tube 1 arranged on the rolling pulley groups 4-25 can rotate, the cutter 4-9 is driven to rotate, and the large-caliber thin-walled tube 1 is cut.
Two threshold values, a first threshold value and a second threshold value, are preset for the winding current of the motor 4-4, the first threshold value being greater than the second threshold value. When the cutter 4-9 is used for processing the large-caliber thin-wall pipe fitting 1, the motor 4-4 bears load. In a steady cutting state, the motor 4-4 maintains the winding current running between the first threshold and the second threshold. When the rotating speed of the motor 4-4 is gradually increased, the micro-pendulum support 4-12 is subjected to inertia and the friction force between the synchronous belt 4-18 and the synchronous pulley, the inclination angle is increased, the cutting depth of the cutter 4-9 aiming at the large-caliber thin-wall pipe fitting 1 is increased, and the load borne by the motor 4-4 is increased. When the load torque is too large and exceeds the rated torque, the winding current will continue to rise. When the winding current exceeds a first threshold value, the rotating speed of the motor 4-4 is gradually reduced, the fine tuning support 4-12 is lowered, the cutter 4-9 is far away from the large-caliber thin-wall pipe fitting 1, the cutting depth is reduced, the resistance of the cutter 4-9 is reduced, the load borne by the motor 4-4 is reduced, and the winding current is reduced. When the winding current is lower than a second threshold value, the rotating speed of the motor 4-4 is gradually increased, the micro-pendulum support 4-12 is subjected to inertia and the friction force between the synchronous belt 4-18 and the synchronous pulley again, the inclination angle is increased, and the cutting depth of the cutter 4-9 aiming at the large-caliber thin-wall pipe fitting 1 is increased for a secondary cycle.
Claims (10)
1. A flexible force cutting device for large-caliber thin-wall parts is characterized by comprising: the cutting device comprises a left supporting unit, a cutting adjusting unit, a right supporting unit and a bottom plate; the left supporting unit, the cutting adjusting unit and the right supporting unit are sequentially arranged on the bottom plate; the left supporting unit and the right supporting unit support and limit the large-caliber thin-wall part, and the large-caliber thin-wall part is cut through the cutting adjusting unit.
2. The flexible force cutting device for large-caliber thin-wall parts according to claim 1, wherein the left supporting unit and the right supporting unit have the same structure.
3. The flexible force cutting device for the large-caliber thin-wall part according to claim 1, wherein the left supporting unit comprises a hand wheel, a first supporting assembly, a second supporting assembly, a lead screw supporting seat, a lead screw nut seat, a slide rail and a supporting seat; one end of the lead screw is connected with the hand wheel, penetrates through the lead screw supporting seat and the lead screw nut seat, and the other end of the lead screw is assembled on the supporting base; the screw rod supporting seat and the screw rod nut seat are arranged at the same height; the first supporting assembly is fixed on the supporting base through the lead screw supporting seat; the slide rail is positioned below the screw rod, one end of the slide rail is arranged on the screw rod supporting seat and penetrates through the screw rod nut seat, and the other end of the slide rail is arranged on the supporting base; the second support assembly is arranged on the lead screw nut seat; and a hand wheel is shaken, and the lead screw nut seat drives the second support assembly to move along the lead screw and the slide rail, so that the distance between the second support assembly and the first support assembly is adjusted.
4. A large caliber thin wall part flexible force cutting device according to claim 3, wherein the first support component comprises: four rollers, two wheel shafts and a wheel seat; the wheel shafts penetrate through the wheel seats, and two ends of each wheel shaft are provided with a roller; the roller is rotatable.
5. The flexible force cutting device for large-caliber thin-wall parts according to claim 1, wherein the second support component comprises: the four rolling wheels, two wheel shafts, a wheel seat, two hinges and a rotating shaft; the wheel shafts penetrate through the wheel seats, and two ends of each wheel shaft are provided with a roller; the roller can rotate; two hinges are arranged below the wheel seat and fixed on the rotating shaft, and the second supporting component is assembled with the screw nut seat through the rotating shaft to realize the pitching posture and rotation of the second supporting component.
6. The flexible force cutting device for large-caliber thin-wall parts according to claim 1, wherein the cutting adjusting unit comprises: the device comprises an adjusting component, a fine adjustment bracket, a cutting component, a conveying component, a motor and a transmission case; the adjusting assembly, the fine adjustment bracket and the conveying assembly are arranged on the transmission case; the fine adjustment bracket is movably matched with the transmission case; the transmission case and the motor are arranged on the base; the adjusting component adjusts an included angle between the fine adjustment support and the base; the cutting assembly is arranged on the fine adjustment support and is used for cutting the large-caliber thin-wall part; the motor is connected with the conveying assembly, and the rotating speed of the cutting assembly and the rotation of the large-caliber thin-wall part are controlled through the conveying assembly.
7. The flexible force cutting device for large-caliber thin-walled parts according to claim 6, wherein the adjusting assembly comprises: the fine adjustment nut is arranged on the transmission case, the upright post is arranged on the transmission case, the adjusting screw rod penetrates through the upright post, and the supporting ball is arranged in the direction close to the micro-pendulum bracket and at one end of the adjusting screw rod; rotating the fine adjustment nut to enable an included angle to be formed between the transmission case and the bottom plate, and adjusting the thin-wall part to be in a horizontal state; through rotating the adjusting screw, the supporting balls support the micro-pendulum support, and an included angle between the fine adjustment support and the transmission case seat is changed.
8. The flexible force cutting device for large-caliber thin-wall parts according to claim 6, wherein the cutting assembly comprises: the four supporting wheels, the four supporting frames, the supporting shaft, the four tension springs, the cutter shaft and the cutter are arranged; the supporting shaft is arranged on the fine adjustment support, two supporting frames are arranged at two ends of the supporting shaft respectively, and the four supporting frames and the supporting shaft move in a matched mode; the supporting wheel is arranged at one end of the supporting frame, the other end of the supporting frame is fixedly provided with a tension spring, the two tension springs at the same side are connected together, a cutter shaft is fixed in the supporting shaft, and the cutter is arranged on the cutter shaft and located at one end of the two supporting frames at the same side.
9. A large-caliber thin-walled part flexible force cutting device according to claim 6, wherein the transmission assembly comprises: the belt pulley group, the input shaft, the first transmission shaft, the second transmission shaft, the third transmission shaft, the fourth transmission shaft, the fifth transmission shaft, the sixth transmission shaft, the seventh transmission shaft, the eighth transmission shaft, gears and rolling pulley groups are sleeved on each transmission shaft and are different in size; the input shaft, the first transmission shaft, the second transmission shaft, the third transmission shaft, the fourth transmission shaft, the fifth transmission shaft, the sixth transmission shaft, the seventh transmission shaft and the eighth transmission shaft are all arranged on the transmission case; the belt set is sleeved on the belt pulley set, the output end of the motor is connected with one side of the belt pulley set, the other side of the motor is connected with the input shaft, a gear on the input shaft is respectively meshed with a gear on a first transmission shaft and a gear on a fifth transmission shaft, the gear on the first transmission shaft is meshed with a gear on a second rotating shaft, the gear on the second transmission shaft is meshed with a gear on a fourth transmission shaft, the gear on the fourth transmission shaft is meshed with a gear on a third transmission shaft, the third transmission shaft penetrates through a transmission case, and two wheels of a rolling wheel set are arranged at two ends of the third transmission shaft; the gear on the fifth transmission shaft is meshed with the gear on the sixth transmission shaft, the gear on the sixth transmission shaft is meshed with the gear on the seventh transmission shaft, the seventh transmission shaft is provided with a belt wheel, and a transmission belt is arranged between the belt wheel and the belt wheel on the cutter shaft to drive the cutter to rotate and cut; the gear on the seventh transmission shaft is meshed with the gear on the eighth transmission shaft, and the eighth transmission shaft penetrates through two wheels of the rolling wheel set arranged at two ends of the transmission case; the rotating speeds of the rolling wheel on the third transmission shaft and the rolling wheel on the eighth transmission shaft are different; the motor transmits kinetic energy to the first transmission shaft, the second transmission shaft, the third transmission shaft, the fourth transmission shaft, the fifth transmission shaft, the sixth transmission shaft, the seventh transmission shaft and the eighth transmission shaft through the belt pulley group, the belt pulley group and the input shaft, the motor is sleeved on each transmission shaft, and gears and rolling wheel groups with different sizes enable large-caliber thin-walled parts arranged on the rolling wheel groups to rotate, drive the cutter to rotate and cut the large-caliber thin-walled parts.
10. The flexible force cutting device for the large-caliber thin-wall parts according to claim 6 or 9, wherein two threshold values, namely a first threshold value and a second threshold value, are preset for the winding current of the motor, and the first threshold value is larger than the second threshold value; when the cutter is used for processing thin-wall parts, the motor bears load; in a stable cutting state, the motor maintains the winding current running between a first threshold value and a second threshold value; when the rotating speed of the motor is gradually increased, the micro-pendulum support is subjected to inertia and friction force of the synchronous belt and the synchronous belt wheel, the inclination angle of the micro-pendulum support is increased, the cutting depth of the cutter for the thin-wall part is increased, and the load borne by the motor is increased; when the load torque is too large and exceeds the rated torque of the motor, the winding current can be continuously increased; when the winding current exceeds a first threshold value, the rotating speed of the motor is gradually reduced, the inclination angle of the micro-pendulum support is reduced, the fine tuning support is lowered, the cutter is far away from the large-caliber thin-wall part, the cutting depth is reduced, the resistance of the cutter is reduced, the load borne by the motor is reduced, and the winding current is reduced; when the winding current is lower than a second threshold value, the rotating speed of the motor is gradually increased, the micro-pendulum support is subjected to inertia and the friction force of the synchronous belt and the synchronous belt wheel again, the inclination angle is increased, and the cutting depth of the cutter aiming at the thin-wall part is increased for secondary circulation.
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| CN202110505608.XA CN113333845B (en) | 2021-05-10 | 2021-05-10 | Flexible force cutting device for large-caliber thin-wall part |
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| CN202110505608.XA CN113333845B (en) | 2021-05-10 | 2021-05-10 | Flexible force cutting device for large-caliber thin-wall part |
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| CN113333845B (en) | 2023-04-25 |
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